KR101677612B1 - Swiching mode power supply and controlling method thereof - Google Patents

Abstract

The present invention relates to a switching mode power supply and a control method thereof. To this end, a switching mode power supply device according to the present invention includes: a switch unit for outputting an input commercial AC power; A power switch for receiving and outputting the commercial AC power; A power cutoff unit for receiving and outputting power from the power switch based on a control signal; A rectifying unit for rectifying the power output from the switch unit, the power switch, or the power cutoff unit; A smoothing unit for smoothing the rectified voltage; A transformer for converting the smoothed DC voltage into a plurality of voltages and outputting the converted voltages; And a control unit for generating a control signal for controlling operations of the switch unit, the power switch, and the power cut-off unit, wherein the rectifying unit is configured to, when power is restored after the power failure, And the power supplied through the switch unit is rectified.

Switching mode power supply (SMPS), standby power,

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switching mode power supply,

The present invention relates to a switching mode power supply and a control method thereof.

Generally, a switched mode power supply (SMPS) converts commercial AC power (AC) to appropriate DC power and supplies it to each load, including the control system.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a switching mode power supply apparatus and a control method thereof that enable a normal operation of the system based on a pre-stored system operation state when a system is restored after a power failure.

Another object of the present invention is to provide a switching mode power supply apparatus and a control method thereof that operate the entire system in a state before power failure without additional operation at the time of power failure after power failure.

According to an aspect of the present invention, there is provided a switching mode power supply comprising: a switch unit for outputting an input commercial AC power; A power switch for receiving and outputting the commercial AC power; A power cutoff unit for receiving and outputting power from the power switch based on a control signal; A rectifying unit for rectifying the power output from the switch unit, the power switch, or the power cutoff unit; A smoothing unit for smoothing the rectified voltage; A transformer for converting the smoothed DC voltage into a plurality of voltages and outputting the converted voltages; And a control unit for generating a control signal for controlling operations of the switch unit, the power switch, and the power cut-off unit, wherein the rectifying unit is configured to, when power is restored after the power failure, And the power supplied through the switch unit is rectified.

According to another aspect of the present invention, there is provided a method of controlling a switching-mode power supply, the method comprising: storing an operating state at a predetermined time interval during normal operation; And driving the system using a power source supplied through a connection between the switch unit and the rectifying unit based on the stored operation state when the power source is recovered after the power failure.

The switching mode power supply and the control method thereof according to the embodiment of the present invention enable stable operation of the system by enabling normal operation of the system based on the pre-stored system operation state upon power failure after system power failure have.

Further, the switching mode power supply apparatus and the control method thereof according to the embodiment of the present invention can improve the convenience in use by supplying a voltage to the system and performing normal operation of the system, have.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration and operation according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a switching mode power supply according to a first embodiment of the present invention. As shown in FIG. 1, the switching mode power supply 100 includes a power switch 110, a switch unit 120, A power cutoff unit 130, a rectification unit 140, a smoothing unit 150, a transforming unit 160, a voltage sensing unit 170, and a control unit 180.

The power switch 110 is operated by a user input and supplies the input commercial AC power (or AC power) to the rectifier 140 when the power switch 110 is turned on D, and supplies a voltage to the control unit 180 after a predetermined process.

The power switch 110 supplies the input commercial AC power to the power cutoff unit 130 when the power switch 110 is turned on.

The switch 120 is connected to an outlet through which the commercial AC power is supplied and a power cord provided in the switching mode power supply 100 is connected to an outlet (B) to the power cut-off unit 130. The power cut-

In addition, when the system is in operation, the switch unit 120 releases the connection (B) with the power cutoff unit 130 based on the control signal generated by the control unit 180, (A) the commercial AC power to the rectifying unit 140 directly.

The switching unit 120 maintains the connection B with the power shutoff unit 130 based on the control signal generated by the control unit 180 when all the strokes are normally terminated, Thereby releasing the connection (A) with the connection terminal (140).

The power cutoff unit 130 may be configured to cut off the commercial AC power output from the power switch 110 when the system is operating normally based on the control signal generated by the controller 180, (E).

That is, the power cutoff unit 130 may be configured to switch the power supply to the control unit 180 based on a control signal generated by a microcomputer (not shown) of the apparatus (or system) having the control unit 180 or the switching mode power supply apparatus 100 And performs an input or a shut-off function of the commercial AC power inputted from the outside.

The power shutoff unit 130 may include a switching device such as a relay.

The power cutoff unit 130 turns off the power (or the function) of the power cutoff unit 130 based on the control signal generated by the control unit 180 upon a normal termination.

Also, it is possible to prevent noise of the input line of the commercial AC power outputted from the power cut-off unit 130 from entering into the switching mode power supply 100, A filter (not shown) may be further included to prevent the switching noise from flowing into the input line of the commercial AC power source.

For example, the filter removes the noise of the commercial AC power outputted from the power cut-off unit 130 and outputs the noise to the rectifying unit 140. The rectifying unit 140 rectifies the no- And can be configured to rectify.

The rectifying unit 140 rectifies the commercial AC power input from the outside.

That is, the rectifying unit 140 converts the input commercial AC power into a DC power (or a DC voltage) by using a diode rectifier or the like.

For example, when the power switch 110 is turned on, the rectifying unit 140 rectifies the commercial AC power input through the power switch 110.

The rectifier 140 may be connected to the switching unit 120 (A) or the power source intercepting unit 130 (E) via the switch unit 120 (A) based on the control signal generated by the controller 180. Alternatively, The commercial AC power source is rectified.

The smoothing unit 150 includes a capacitor or a circuit including the capacitor, and stores the DC voltage output from the rectifying unit 140 and smoothens it.

The transforming unit 160 converts the DC voltage output from the smoothing unit 150 into a plurality of driving voltages and outputs them.

For example, when the switching mode power supply 100 is provided in the washing machine, the transformer 160 may generate a control signal generated by a microcomputer (not shown) provided in the controller 180 or the washing machine The voltage output from the smoothing unit 150 is converted into a voltage of 5 V, 13.5 V, or 16.5 V used in the washing machine, and is output. At this time, the output voltage of 5V is supplied to the microcomputer, and the output voltage of 13.5V is supplied to a load such as a pump, a clutch, a water supply valve, and the output voltage of 16.5V LED, intelligent power module (Intelligent Power Module: IPM), and buzzer.

Further, a DC stabilizing unit (not shown) for maintaining the DC link voltage constant on the basis of the input voltage and the input current input to the smoothing unit 150 and the DC link voltage output from the smoothing unit 150 .

The DC stabilizing unit is connected between the smoothing unit 150 and the transforming unit 160 and maintains a constant DC link voltage output from the smoothing unit 150 to the transforming unit 160. The DC stabilizing unit may be disposed in parallel between the smoothing unit 150 and the transforming unit 160, or may be independently provided in the form of an external device. In the case of external dc stabilization, it can be used without a direct current safety connection in the area where the normal voltage is supplied and only in a region where the low voltage occurs or the input power is unstable It can be used by connecting direct current control.

The voltage sensing unit 170 senses voltages of one or more output terminals output from the transforming unit 160.

A braking resistor unit (not shown) may be further provided between the transforming unit 160 and the voltage sensing unit 170 to prevent the components from being burned when an event such as rapid braking or reverse braking of the motor occurs.

When the power switch 110 is turned on, the controller 180 is rectified by the rectifying unit 140 receiving the commercial AC power output from the power switch 110, 150 and the transforming unit 160 to perform an initialization process of the system.

In addition, the controller 180 generates and outputs a control signal for turning on the function of the power shutoff unit 130.

Also, the controller 180 rectifies the rectified voltage by the rectifying unit 140 receiving the (E) commercial AC power output from the power cut-off unit 130 powered on based on the generated control signal, And controls the normal operation of the entire system based on the voltages smoothed and transformed by the transformer 150 and the transformer 160, respectively.

When the power switch 110 is turned on, the control unit 180 releases the connection B between the switch unit 120 and the power cutoff unit 130, And a control signal for maintaining the connection (A) between the rectifying part 140 and the rectifying part 140.

The control unit 180 stores the operation state (or the operation state) (including the state information on the normal operation mode or the standby mode, etc.) of the system (for example, a washing machine) And controls the vehicle to proceed to the previous driving state based on the stored operation state without additional input (or control) of the user at the time of restoration after power failure. The driving voltage for driving the control unit 180 when the electric power is restored after the electric power is supplied to the rectifying unit 140 through the switch unit 120 based on the stored operation state, Is a rectified, smoothed, and transformed voltage.

The controller 180 generates a control signal for controlling the transformer 160 based on the voltage detected by the voltage detector 170.

When the switching mode power supply apparatus 100 is operating normally, the controller 180 controls the switching power supply apparatus 100 so that the predetermined DC power supply DC voltage) to a predetermined DC power source, and controls the transformer 160 based on the generated control signal.

The control unit 180 releases the connection A between the switch unit 120 and the rectifier unit 140 and stops the switch unit 120 and the power shutoff unit 130 (B). The control unit 180 may further generate a control signal for turning off the power supply to the power shutoff unit 130 when the control signal is generated.

In this way, when the apparatus (or system) completes its operation after the power failure, the commercial AC power input through the switch unit 120 is directly supplied to the rectifying unit 140, It is possible to perform normal operation.

Also, during the termination of the operation, the connection A between the switch unit 120 and the rectifying unit 140 is released, and the power shutoff unit 130 is turned off to cut off the power supply, so that standby power of 0.5 W or less can be maintained .

Hereinafter, a method of controlling the switching mode power supply according to the present invention will be described in detail with reference to FIGS. 1 and 2. FIG.

2 is a flowchart illustrating a method of controlling a switching mode power supply according to a first embodiment of the present invention.

First, when the power switch 110 is turned on, the commercial AC power output from the power switch 110 is output to the power cutoff unit 130 (C) and the rectifying unit 140 (D) (S210).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transformer 160 converts the DC voltage output from the smoothing unit 150 into a driving voltage for driving the controller 180 and outputs the DC voltage.

The control unit 180 then initializes the switching mode power supply 100 based on the driving voltage output from the transforming unit 160 and generates a first control signal for receiving the main power (S220).

Thereafter, the power cutoff unit 130 maintains the power-on state based on the generated first control signal, and receives (C) the commercial AC power input through the power switch 110 as the main power And outputs it to the rectifying unit 140.

The controller 120 releases the connection B between the switch unit 120 and the power cutoff unit 130 based on the generated first control signal and controls the connection between the switch unit 120 and the rectifying unit 140 (S230).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the controller 180 into a plurality of voltages required by any device provided with the switching mode power supply 100 And outputs the converted voltage (S240).

Thereafter, the controller 180 stores an operation state (or a running state) when a predetermined time interval or a specific event occurs.

That is, under the control of the controller 180, when the commercial AC power is input to the rectifier 140 through the switch 120, (C) the commercial AC power source is inputted to the power cutoff unit 130 and the commercial AC power inputted to the power cutoff unit 130 is input to the rectifying unit 140, the normal operation mode or the standby mode, State information and the like in a storage unit (S250).

Thereafter, when the power is turned on again after a sudden power failure occurs during operation (or driving), the rectifier 140 generates a commercial AC signal (hereinafter referred to as " A ") input through the switch unit 120 based on the stored operation state The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140 and the transforming unit 160 converts the DC voltage output from the smoothing unit 150 to the control unit 180) and outputs the driving voltage.

Thereafter, the controller 180 generates and outputs a second control signal to receive the main power to advance (or maintain) the operation state before the power-off based on the drive voltage output from the transformer 160 (S260).

The power cutoff unit 130 and the power switch 110 maintain the power on state based on the generated second control signal and the power cutoff unit 130 is connected to the power switch 110, (C) input from the main power source to the rectifier 140 (S270).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the controller 180 into a plurality of voltages required by any device provided with the switching mode power supply 100 And outputs the converted voltage.

Thereafter, the control unit 180 controls the operation state before the power failure by using the plurality of voltages output from the transforming unit 160 and the operation state of the stored static electricity (S280).

When the power of the switching mode power supply 100 or any device provided with the switching mode power supply 100 is terminated or when the stroke is normally terminated, the controller 180 controls the third control And outputs the third control signal to the switching unit 120 and the power shutoff unit 130 to release the connection A between the switch unit 120 and the rectification unit 140, The connection B is maintained and the power of the power cutoff unit 130 is turned off (S290).

FIG. 3 is a block diagram of a switching mode power supply according to a second embodiment of the present invention. As shown in FIG. 3, the switching mode power supply 100 includes a power switch 110, a switch 120, A power cutoff unit 130, a rectification unit 140, a smoothing unit 150, a transforming unit 160, a voltage sensing unit 170, and a control unit 180.

When the power switch 110 is turned on, the power switch 110 supplies the input commercial AC power (or AC power) to the rectifier 140 (D And supplies a voltage to the control unit 180 after a predetermined process.

The power switch 110 supplies the input commercial AC power to the power cutoff unit 130 when the power switch 110 is turned on.

The switch unit 120 is connected to the outlet to which the commercial AC power is supplied and a power cord provided in the switching mode power supply unit 100 is connected to the outlet by the control unit 180 And outputs the inputted commercial AC power to the rectifying unit 140 directly (A) based on the generated control signal.

The switch unit 120 releases the connection (A) with the rectifier unit 140 based on the control signal generated by the controller 180 when all the strokes normally terminate.

The power cutoff unit 130 may be configured to cut off the commercial AC power output from the power switch 110 when the system is operating normally based on the control signal generated by the controller 180, (E).

That is, the power cutoff unit 130 may be configured to switch the power supply to the control unit 180 based on a control signal generated by a microcomputer (not shown) of the apparatus (or system) having the control unit 180 or the switching mode power supply apparatus 100 And performs an input or a shut-off function of the commercial AC power inputted from the outside.

In addition, the power shutoff unit 130 may include a switching device such as a relay.

The power cutoff unit 130 turns off the power (or the function) of the power cutoff unit 130 based on the control signal generated by the control unit 180 upon a normal termination.

Also, it is possible to prevent the noise of the input line of the commercial AC power outputted from the power cut-off unit 130 from entering the switching mode power supply 100 and to prevent the switching noise inside the switching mode power supply 100 And a filter (not shown) for preventing the input of the commercial AC power to the input line.

For example, the filter removes the noise of the commercial AC power outputted from the power cut-off unit 130 and outputs the noise to the rectifying unit 140. The rectifying unit 140 rectifies the no- And can be configured to rectify.

The rectifying unit 140 rectifies the commercial AC power input from the outside.

That is, the rectifying unit 140 converts the input commercial AC power into a DC power (or a DC voltage) by using a diode rectifier or the like.

For example, when the power switch 110 is turned on, the rectifying unit 140 rectifies the commercial AC power input through the power switch 110.

Alternatively, the rectifying unit 140 may be connected to the switching unit 120 (A) or the power intercepting unit 130 (E) based on the control signal generated by the control unit 180 Rectify commercial AC power.

The smoothing unit 150 includes a capacitor or a circuit including the capacitor, and stores the DC voltage output from the rectifying unit 140 and smoothens it.

The transforming unit 160 converts the DC voltage output from the smoothing unit 150 into a plurality of driving voltages and outputs them.

For example, when the switching mode power supply 100 is provided in the washing machine, the transformer 160 may generate a control signal generated by a microcomputer (not shown) provided in the controller 180 or the washing machine The voltage output from the smoothing unit 150 is converted into a voltage of 5 V, 13.5 V, or 16.5 V used in the washing machine, and is output. At this time, the output voltage of 5V is supplied to the microcomputer, and the output voltage of 13.5V is supplied to a load such as a pump, a clutch, a water supply valve, and the output voltage of 16.5V is supplied to an LED, Module, and buzzer.

Further, a DC stabilizing unit (not shown) for maintaining the DC link voltage constant on the basis of the input voltage and the input current input to the smoothing unit 150 and the DC link voltage output from the smoothing unit 150 .

The DC stabilizing unit is connected between the smoothing unit 150 and the transforming unit 160 and maintains a constant DC link voltage output from the smoothing unit 150 to the transforming unit 160. The DC stabilizing unit may be disposed in parallel between the smoothing unit 150 and the transforming unit 160, or may be independently provided in the form of an external device. In the case of external dc stabilization, it can be used without a direct current safety connection in the area where the normal voltage is supplied and only in a region where the low voltage occurs or the input power is unstable It can be used by connecting direct current control.

The voltage sensing unit 170 senses voltages of one or more output terminals output from the transforming unit 160.

A braking resistor unit (not shown) may be further provided between the transforming unit 160 and the voltage sensing unit 170 to prevent the components from being burned when an event such as rapid braking or reverse braking of the motor occurs.

When the power switch 110 is turned on, the controller 180 is rectified by the rectifying unit 140 receiving the commercial AC power output from the power switch 110, 150 and the transforming unit 160 to perform an initialization process of the system.

In addition, the controller 180 generates and outputs a control signal for turning on the function of the power shutoff unit 130.

Also, the controller 180 rectifies the rectified voltage by the rectifying unit 140 receiving the (E) commercial AC power output from the power cut-off unit 130 powered on based on the generated control signal, And controls the normal operation of the entire system based on the voltages smoothed and transformed by the transformer 150 and the transformer 160, respectively.

The control unit 180 generates a control signal for maintaining the connection A between the switch unit 120 and the rectifying unit 140 when the power switch 110 is turned on.

The control unit 180 stores the operation state (or the operation state) of the system (including the state information on the normal operation mode or the standby mode) when the system is in operation, And controls to continue the previous driving state based on the stored operation state without additional input (or control). The driving voltage for driving the control unit 180 when the electric power is restored after the electric power is supplied to the rectifying unit 140 through the switch unit 120 based on the stored operation state, Is a rectified, smoothed, and transformed voltage.

The controller 180 generates a control signal for controlling the transformer 160 based on the voltage detected by the voltage detector 170.

When the switching mode power supply apparatus 100 is operating normally, the controller 180 controls the switching power supply apparatus 100 so that the predetermined DC power supply DC voltage) to a predetermined DC power source, and controls the transformer 160 in response to the generated control signal.

The control unit 180 generates a control signal for releasing the connection A between the switch unit 120 and the rectifying unit 140 when all the strokes are normally terminated. The control unit 180 may further generate a control signal for turning off the power supply to the power shutoff unit 130 when the control signal is generated.

Hereinafter, a method of controlling the switching mode power supply according to the present invention will be described in detail with reference to FIG. 3 to FIG.

4 is a flowchart illustrating a method of controlling a switching mode power supply according to a second embodiment of the present invention.

First, when the power switch 110 is turned on, the commercial AC power output from the power switch 110 is output to the power cutoff unit 130 (C) and the rectifying unit 140 (D) (S410).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transformer 160 converts the DC voltage output from the smoothing unit 150 into a driving voltage for driving the controller 180 and outputs the DC voltage.

The control unit 180 then initializes the switching mode power supply 100 based on the driving voltage output from the transforming unit 160 and generates a first control signal for receiving the main power (S420).

Thereafter, the power cutoff unit 130 maintains the power-on state based on the generated first control signal, and receives (C) the commercial AC power input through the power switch 110 as the main power And outputs it to the rectifying unit 140.

In addition, based on the generated first control signal, a connection A between the switch unit 120 and the rectifying unit 140 is maintained (S430).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the controller 180 into a plurality of voltages required by any device provided with the switching mode power supply 100 And outputs the converted voltage (S440).

Thereafter, the controller 180 stores an operation state (or a running state) when a predetermined time interval or a specific event occurs.

That is, under the control of the controller 180, when the commercial AC power is input to the rectifier 140 through the switch 120, (C) the commercial AC power source is inputted to the power cutoff unit 130 and the commercial AC power inputted to the power cutoff unit 130 is input to the rectifying unit 140, the normal operation mode or the standby mode, State information and the like in a storage unit (S450).

Thereafter, when the power is turned on again after a sudden power failure occurs during operation (or driving), the rectifier 140 generates a commercial AC signal (hereinafter referred to as " A ") input through the switch unit 120 based on the stored operation state The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140 and the transforming unit 160 converts the DC voltage output from the smoothing unit 150 to the control unit 180) and outputs the driving voltage.

Thereafter, the controller 180 generates and outputs a second control signal to receive the main power to advance (or maintain) the operation state before the power-off based on the drive voltage output from the transformer 160 (S460).

The power cutoff unit 130 and the power switch 110 maintain the power on state based on the generated second control signal and the power cutoff unit 130 is connected to the power switch 110, (C) input from the main power source to the main power source and outputs the main AC power to the rectifying unit 140 (S470).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the controller 180 into a plurality of voltages required by any device provided with the switching mode power supply 100 And outputs the converted voltage.

Thereafter, the control unit 180 controls the operation state before the power failure by using the plurality of voltages output from the transforming unit 160 and the stored operation state of the stored electric charge (S480).

When the power of the switching mode power supply 100 or any device provided with the switching mode power supply 100 is terminated or when the operation is normally terminated, Generates a control signal, releases the connection (A) between the switch unit 120 and the rectifier unit 140 based on the generated third control signal, and turns off the power source of the power cutoff unit 130 (S490 ).

5 is a block diagram of a switching mode power supply according to a third embodiment of the present invention. As shown in FIG. 5, the switching mode power supply 100 includes a power switch 110, a switch unit 120, A power cutoff unit 130, a rectification unit 140, a smoothing unit 150, a transforming unit 160, a voltage sensing unit 170, and a control unit 180.

When the power switch 110 is turned on, the power switch 110 supplies the input commercial AC power (or AC power) to the rectifier 140 (D And supplies a voltage to the control unit 180 after a predetermined process.

When the power cord provided in the switching mode power supply unit 100 is connected to a socket to which the commercial AC power is supplied and the operation of the system is stopped, the switch unit 120 switches the input commercial AC And outputs the power to the power cutoff unit 130 (B).

When the system is in operation, the switch unit 120 maintains the connection (B) with the power cutoff unit 130 based on the control signal generated by the control unit 180, (A) the commercial AC power to the rectifying unit 140 directly.

The switching unit 120 maintains the connection B with the power shutoff unit 130 based on the control signal generated by the control unit 180 when all the strokes are normally terminated, Thereby releasing the connection (A) with the connection terminal (140).

The power cutoff unit 130 may be configured to cut off the commercial AC power output from the switch unit 120 when the system is operating normally based on the control signal generated by the controller 180, (E).

That is, the power cutoff unit 130 may be configured to switch the power supply to the control unit 180 based on a control signal generated by a microcomputer (not shown) of the apparatus (or system) having the control unit 180 or the switching mode power supply apparatus 100 And performs an input or a shut-off function of the commercial AC power inputted from the outside.

In addition, the power shutoff unit 130 may include a switching device such as a relay.

The power cutoff unit 130 turns off the power (or the function) of the power cutoff unit 130 based on the control signal generated by the control unit 180 upon a normal termination.

Also, it is possible to prevent the noise of the input line of the commercial AC power outputted from the power cut-off unit 130 from entering the switching mode power supply 100 and to prevent the switching noise inside the switching mode power supply 100 And a filter (not shown) for preventing the input of the commercial AC power to the input line.

For example, the filter removes the noise of the commercial AC power outputted from the power cut-off unit 130 and outputs the noise to the rectifying unit 140. The rectifying unit 140 rectifies the no- And can be configured to rectify.

The rectifying unit 140 rectifies the commercial AC power input from the outside.

That is, the rectifying unit 140 converts the input commercial AC power into a DC power (or a DC voltage) by using a diode rectifier or the like.

For example, when the power switch 110 is turned on, the rectifying unit 140 rectifies the commercial AC power input through the power switch 110.

Alternatively, the rectifying unit 140 may be connected to the switching unit 120 (A) or the power intercepting unit 130 (E) based on the control signal generated by the control unit 180 Rectify commercial AC power.

The smoothing unit 150 includes a capacitor or a circuit including the capacitor, and stores the DC voltage output from the rectifying unit 140 and smoothens it.

The transforming unit 160 converts the DC voltage output from the smoothing unit 150 into a plurality of driving voltages and outputs them.

For example, when the switching mode power supply 100 is provided in the washing machine, the transformer 160 may generate a control signal generated by a microcomputer (not shown) provided in the controller 180 or the washing machine The voltage output from the smoothing unit 150 is converted into a voltage of 5 V, 13.5 V, or 16.5 V used in the washing machine, and is output. At this time, the output voltage of 5V is supplied to the microcomputer, and the output voltage of 13.5V is supplied to a load such as a pump, a clutch, a water supply valve, and the output voltage of 16.5V is supplied to an LED, Module, and buzzer.

Further, a DC stabilizing unit (not shown) for maintaining the DC link voltage constant on the basis of the input voltage and the input current input to the smoothing unit 150 and the DC link voltage output from the smoothing unit 150 .

The DC stabilizing unit is connected between the smoothing unit 150 and the transforming unit 160 and maintains a constant DC link voltage output from the smoothing unit 150 to the transforming unit 160. The DC stabilizing unit may be disposed in parallel between the smoothing unit 150 and the transforming unit 160, or may be independently provided in the form of an external device. In the case of external dc stabilization, it can be used without a direct current safety connection in the area where the normal voltage is supplied and only in a region where the low voltage occurs or the input power is unstable It can be used by connecting direct current control.

The voltage sensing unit 170 senses voltages of one or more output terminals output from the transforming unit 160.

A braking resistor unit (not shown) may be further provided between the transforming unit 160 and the voltage sensing unit 170 to prevent the components from being burned when an event such as rapid braking or reverse braking of the motor occurs.

When the power switch 110 is turned on, the controller 180 is rectified by the rectifying unit 140 receiving the commercial AC power output from the power switch 110, 150 and the transforming unit 160 to perform an initialization process of the system.

In addition, the controller 180 generates and outputs a control signal for turning on the function of the power shutoff unit 130.

Also, the controller 180 rectifies the rectified voltage by the rectifying unit 140 receiving the (E) commercial AC power output from the power cut-off unit 130 powered on based on the generated control signal, And controls the normal operation of the entire system based on the voltages smoothed and transformed by the transformer 150 and the transformer 160, respectively.

When the power switch 110 is turned on, the control unit 180 maintains the connection B between the switch unit 120 and the power cutoff unit 130, And generates a control signal for maintaining the connection (A) of the rectifying part (140).

The control unit 180 stores the operation state (or the operation state) of the system (including the state information on the normal operation mode or the standby mode) when the system is in operation, And controls to continue the previous driving state based on the stored operation state without additional input (or control). The driving voltage for driving the control unit 180 when the electric power is restored after the electric power is supplied to the rectifying unit 140 through the switch unit 120 based on the stored operation state, Is a rectified, smoothed, and transformed voltage.

The controller 180 generates a control signal for controlling the transformer 160 based on the voltage detected by the voltage detector 170.

When the switching mode power supply apparatus 100 is operating normally, the controller 180 controls the switching power supply apparatus 100 so that the predetermined DC power supply DC voltage) to a predetermined DC power source, and controls the transformer 160 based on the generated control signal.

The control unit 180 releases the connection A between the switch unit 120 and the rectifier unit 140 and stops the switch unit 120 and the power shutoff unit 130 (B). The control unit 180 may further generate a control signal for turning off the power supply to the power shutoff unit 130 when the control signal is generated.

Hereinafter, a method of controlling the switching mode power supply according to the present invention will be described in detail with reference to FIGS. 5 to 6. FIG.

6 is a flowchart illustrating a method of controlling a switching mode power supply according to a third embodiment of the present invention.

First, when the power switch 110 is turned on, the commercial AC power outputted from the power switch 110 is outputted to the rectifying section 140 (D) (S610).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transformer 160 converts the DC voltage output from the smoothing unit 150 into a driving voltage for driving the controller 180 and outputs the DC voltage.

The control unit 180 then initializes the switching mode power supply 100 based on the driving voltage output from the transforming unit 160 and generates a first control signal for receiving the main power And outputs it (S620).

Thereafter, the power cutoff unit 130 maintains the power-on state based on the generated first control signal, and receives (B) the commercial AC power input through the switch unit 120 as the main power And outputs it to the rectifying unit 140.

The connection B between the switch unit 120 and the power shutoff unit 130 and the connection A between the switch unit 120 and the rectification unit 140 are maintained based on the generated first control signal. (S630).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the controller 180 into a plurality of voltages required by any device provided with the switching mode power supply 100 And outputs the converted voltage (S640).

Thereafter, the controller 180 stores an operation state (or a running state) when a predetermined time interval or a specific event occurs.

That is, under the control of the controller 180, a state in which the commercial AC power is input to the rectifier 140 through the switch 120, And a state in which the commercial AC power is input to the rectifier 140 and the commercial AC power input to the power cutoff unit 130 is input to the rectifier 140, State information and the like in a storage unit (not shown) (S650).

Thereafter, when the power is turned on again after a sudden power failure occurs during operation (or driving), the rectifier 140 generates a commercial AC signal (hereinafter referred to as " A ") input through the switch unit 120 based on the stored operation state The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140 and the transforming unit 160 converts the DC voltage output from the smoothing unit 150 to the control unit 180) and outputs the driving voltage.

Thereafter, the controller 180 generates and outputs a second control signal to receive the main power to advance (or maintain) the operation state before the power-off based on the drive voltage output from the transformer 160 (S660).

The power cutoff unit 130 maintains the power on state based on the generated second control signal and the power cutoff unit 130 receives the input (B) through the switch unit 120 The commercial AC power is input to the main power source and output (E) to the rectifying unit 140 (S670).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the controller 180 into a plurality of voltages required by any device provided with the switching mode power supply 100 And outputs the converted voltage.

Thereafter, the control unit 180 controls the operation state before the power failure by using the plurality of voltages output from the transforming unit 160 and the operation state of the stored static electricity (S680).

When the power of the switching mode power supply 100 or any device provided with the switching mode power supply 100 is terminated or when the stroke is normally terminated, the controller 180 controls the third control And outputs the third control signal to the switching unit 120 and the power shutoff unit 130 to release the connection A between the switch unit 120 and the rectification unit 140, The connection B is maintained and the power of the power cutoff unit 130 is turned off (S690).

7 is a block diagram of a switching mode power supply according to a fourth embodiment of the present invention. As shown in FIG. 7, the switching mode power supply 100 includes a switch 120, a power shutoff unit 130, A rectifying unit 140, a smoothing unit 150, a transforming unit 160, a voltage sensing unit 170, and a control unit 180.

When the power switch (not shown) included in the switch unit 120 is turned on, the switch unit 120 supplies the input commercial AC power (or AC power) to the rectifying unit 140 (A) And supplies a voltage to the control unit 180 after a predetermined process.

In addition, when the power cord provided in the switching mode power supply unit 100 is connected to an outlet to which the commercial AC power is supplied and the operation of the system is stopped, And outputs the commercial AC power to the power cutoff unit 130 (B).

When the system is in operation, the switch unit 120 maintains the connection (B) with the power cutoff unit 130 based on the control signal generated by the control unit 180, (A) the commercial AC power to the rectifying unit 140 directly.

The switching unit 120 maintains the connection B with the power shutoff unit 130 based on the control signal generated by the control unit 180 when all the strokes are normally terminated, Thereby releasing the connection (A) with the connection terminal (140).

The power cutoff unit 130 may be configured to cut off the commercial AC power output from the switch unit 120 when the system is operating normally based on the control signal generated by the controller 180, (E).

That is, the power cutoff unit 130 may be configured to switch the power supply to the control unit 180 based on a control signal generated by a microcomputer (not shown) of the apparatus (or system) having the control unit 180 or the switching mode power supply apparatus 100 And performs an input or a shut-off function of the commercial AC power inputted from the outside.

In addition, the power shutoff unit 130 may include a switching device such as a relay.

The power cutoff unit 130 turns off the power (or the function) of the power cutoff unit 130 based on the control signal generated by the control unit 180 upon a normal termination.

Also, it is possible to prevent the noise of the input line of the commercial AC power outputted from the power cut-off unit 130 from entering the switching mode power supply 100 and to prevent the switching noise inside the switching mode power supply 100 A filter (not shown) may be further included to prevent the power from flowing into the input line of the commercial AC power source.

For example, the filter removes the noise of the commercial AC power outputted from the power cut-off unit 130 and outputs the noise to the rectifying unit 140. The rectifying unit 140 rectifies the no- And can be configured to rectify.

The rectifying unit 140 rectifies the commercial AC power input from the outside.

That is, the rectifying unit 140 converts the input commercial AC power into a DC power (or a DC voltage) by using a diode rectifier or the like.

For example, when the power switch is turned on, the rectifying unit 140 rectifies the commercial AC power input through the switch unit 120.

Alternatively, the rectifying unit 140 may be connected to the switching unit 120 (A) or the power intercepting unit 130 (E) based on the control signal generated by the control unit 180 Rectify commercial AC power.

The smoothing unit 150 includes a capacitor or a circuit including the capacitor, and stores the DC voltage output from the rectifying unit 140 and smoothens it.

The transforming unit 160 converts the DC voltage output from the smoothing unit 150 into a plurality of driving voltages and outputs them.

For example, when the switching mode power supply 100 is provided in the washing machine, the transformer 160 may generate a control signal generated by a microcomputer (not shown) provided in the controller 180 or the washing machine The voltage output from the smoothing unit 150 is converted into a voltage of 5 V, 13.5 V, or 16.5 V used in the washing machine, and is output. The output voltage of 5V is supplied to the microcomputer. The output voltage of 13.5V is supplied to a load such as a pump, a clutch, a water supply valve, and the output voltage of 16.5V is supplied to the LED, Semiconductor modules, and buzzer.

Further, a DC stabilizing unit (not shown) for maintaining the DC link voltage constant on the basis of the input voltage and the input current input to the smoothing unit 150 and the DC link voltage output from the smoothing unit 150 .

The DC stabilizing unit is connected between the smoothing unit 150 and the transforming unit 160 and maintains a constant DC link voltage output from the smoothing unit 150 to the transforming unit 160. The DC stabilizing unit may be disposed in parallel between the smoothing unit 150 and the transforming unit 160, or may be independently provided in the form of an external device. In the case of external dc stabilization, it can be used without a direct current safety connection in the area where the normal voltage is supplied and only in a region where the low voltage occurs or the input power is unstable It can be used by connecting direct current control.

The voltage sensing unit 170 senses voltages of one or more output terminals output from the transforming unit 160.

A braking resistor unit (not shown) may be further provided between the transforming unit 160 and the voltage sensing unit 170 to prevent the components from being burned when an event such as rapid braking or reverse braking of the motor occurs.

When the power switch is turned on, the controller 180 is rectified by the rectifying unit 140 receiving the commercial AC power output from the switch unit 120, and the smoothing unit 150 and / And is driven based on the voltage smoothed and transformed by the transformer 160 to perform the initialization process of the system.

In addition, the controller 180 generates and outputs a control signal for turning on the function of the power shutoff unit 130.

Also, the controller 180 rectifies the rectified voltage by the rectifying unit 140 receiving the (E) commercial AC power output from the power cut-off unit 130 powered on based on the generated control signal, And controls the normal operation of the entire system based on the voltages smoothed and transformed by the transformer 150 and the transformer 160, respectively.

When the power switch is turned on, the control unit 180 maintains the connection B between the switch unit 120 and the power cutoff unit 130 and connects the switch unit 120 and the rectifying unit 140 to maintain the connection (A).

The control unit 180 stores the operation state (or the operation state) of the system (including the state information on the normal operation mode or the standby mode) when the system is in operation, And controls to continue the previous driving state based on the stored operation state without additional input (or control). The driving voltage for driving the control unit 180 when the electric power is restored after the electric power is supplied to the rectifying unit 140 through the switch unit 120 based on the stored operation state, Is a rectified, smoothed, and transformed voltage.

The control unit 180 generates a control signal for controlling the transformer 160 based on the voltage sensed by the voltage sensing unit 170.

When the switching mode power supply apparatus 100 is operating normally, the controller 180 controls the switching power supply apparatus 100 so that the predetermined DC power supply DC voltage) to a predetermined DC power source, and controls the transformer 160 based on the generated control signal.

The control unit 180 releases the connection A between the switch unit 120 and the rectifier unit 140 and stops the switch unit 120 and the power shutoff unit 130 (B). The control unit 180 may further generate a control signal for turning off the power supply to the power shutoff unit 130 when the control signal is generated.

Hereinafter, a method of controlling the switching mode power supply according to the present invention will be described in detail with reference to FIGS. 7 to 8. FIG.

8 is a flowchart illustrating a method of controlling a switching mode power supply according to a fourth embodiment of the present invention.

First, when the power switch is turned on, the commercial AC power outputted from the switch unit 120 is outputted to the power cutoff unit 130 (B) and the rectifying unit 140 (A) (S810).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 into a driving voltage for driving the control unit 180 and outputs the driving voltage.

The control unit 180 then initializes the switching mode power supply 100 based on the driving voltage output from the transforming unit 160 and generates a first control signal for receiving the main power (S820).

Thereafter, the power cutoff unit 130 maintains the power-on state based on the generated first control signal, and receives (B) the commercial AC power input through the switch unit 120 as the main power And outputs (E) to the rectifying unit 140.

The connection B between the switch unit 120 and the power shutoff unit 130 and the connection A between the switch unit 120 and the rectification unit 140 are controlled based on the generated first control signal, (S830).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the controller 180 into a plurality of voltages required by any device provided with the switching mode power supply 100 And outputs the converted voltage (S840).

Thereafter, the controller 180 stores an operation state (or a running state) when a predetermined time interval or a specific event occurs.

That is, under the control of the controller 180, a state in which the commercial AC power is input to the rectifier 140 through the switch 120, And a state in which the commercial AC power is input to the rectifier 140 and the commercial AC power input to the power cutoff unit 130 is input to the rectifier 140, State information and the like in a storage unit (not shown) (S850).

Thereafter, when the power is turned on again after a sudden power failure occurs during operation (or driving), the rectifier 140 generates a commercial AC signal (hereinafter referred to as " A ") input through the switch unit 120 based on the stored operation state The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140 and the transforming unit 160 converts the DC voltage output from the smoothing unit 150 to the control unit 180) and outputs the driving voltage.

Thereafter, the controller 180 generates and outputs a second control signal to receive the main power to advance (or maintain) the operation state before the power-off based on the drive voltage output from the transformer 160 (S860).

The power cutoff unit 130 maintains the power on state based on the generated second control signal and the power cutoff unit 130 receives the input (B) through the switch unit 120 The mains power is input to the rectifying unit 140 (S870).

Then, the rectifying unit 140 rectifies and outputs the inputted commercial AC power. The smoothing unit 150 smoothes the DC voltage output from the rectifying unit 140. The transforming unit 160 transforms the DC voltage output from the smoothing unit 150 under control of the control unit 180 into a plurality of DC voltages required in an apparatus equipped with the switching mode power supply apparatus 100 And outputs the converted voltage.

Thereafter, the control unit 180 controls the operation state before the power failure by using the plurality of voltages output from the transforming unit 160 and the operation state of the stored static electricity (S880).

When the power of the switching mode power supply 100 or any device provided with the switching mode power supply 100 is terminated or when the stroke is normally terminated, the controller 180 controls the third control And outputs the third control signal to the switching unit 120 and the power shutoff unit 130 to release the connection A between the switch unit 120 and the rectification unit 140, The connection B is maintained and the power of the power cut-off unit 130 is turned off (S890).

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1 is a block diagram of a switching mode power supply according to a first embodiment of the present invention.

2 is a flowchart illustrating a method of controlling a switching mode power supply according to a first embodiment of the present invention.

3 is a block diagram of a switching mode power supply according to a second embodiment of the present invention.

4 is a flowchart illustrating a method of controlling a switching mode power supply according to a second embodiment of the present invention.

5 is a block diagram of a switching mode power supply according to a third embodiment of the present invention.

6 is a flowchart illustrating a method of controlling a switching mode power supply according to a third embodiment of the present invention.

7 is a block diagram of a switching mode power supply according to a fourth embodiment of the present invention.

8 is a flowchart illustrating a method of controlling a switching mode power supply according to a fourth embodiment of the present invention.

Claims (12)

A switching mode power supply for supplying power to a power consumption device or a power consumption system, A switch unit for outputting the input commercial AC power; A power switch for receiving and outputting the commercial AC power; A power cutoff unit for receiving and outputting power from the power switch based on a control signal; A rectifying unit for rectifying the power output from the switch unit, the power switch, or the power cutoff unit; A smoothing unit for smoothing the rectified voltage; A transformer for converting the smoothed DC voltage into a plurality of voltages and outputting the converted voltages; And And a control unit for storing an operation state of the apparatus or the system and generating a control signal for controlling operations of the switch unit, the power switch, and the power cutoff unit, The rectifying unit includes: And regulates the power supplied through the switch unit based on the stored operation state when the power is restored after the power failure. The apparatus of claim 1, And a first control signal for turning on the operation of the power cutoff unit is generated by using the voltage rectified through the rectification unit connected to the output terminal of the power switch when the power switch is on, Switching mode power supply. The power supply apparatus according to claim 2, And outputs the commercial AC power output from the power switch to the rectifying unit based on the generated first control signal. 3. The apparatus according to claim 2, Wherein when the power switch is turned on, an input power is outputted to the rectifying unit, and the connection to the power cutoff unit is released. The apparatus of claim 1, And generates a second control signal for controlling operations of the switch unit and the power cutoff unit when the operation of the apparatus or the system is normally terminated. 6. The apparatus according to claim 5, Wherein the output of the power source based on the second control signal is released to maintain the connection with the power cutoff unit. 6. The apparatus of claim 5, And is turned off based on the second control signal. The apparatus of claim 1, And disconnects the switch unit and the rectifying unit to maintain the connection between the switch unit and the power cutoff unit when the power of the apparatus or the system is terminated or the operation of the apparatus or the system is normally terminated, And generates a third control signal for turning off the power of the blocking unit. A switch unit for outputting the input commercial AC power; A power switch for receiving and outputting the commercial AC power; A power cutoff unit for receiving and outputting power from the power switch based on a control signal; A rectifying unit for rectifying the power output from the switch unit, the power switch, or the power cutoff unit; A smoothing unit for smoothing the rectified voltage; And a transformer for converting the smoothed DC voltage into a plurality of voltages and outputting the converted voltages, A control method of a switching mode power supply for supplying power to a power consumption device or a power consumption system, Storing the operating state of the device or the system at a predetermined time interval when the device or the system is in normal operation; And And driving the apparatus or the system using a power source supplied through a connection between the switch unit and the rectifying unit based on the stored operation state when the power source is restored after the power failure. A method of controlling a device. 10. The method of claim 9, Processing the commercial AC power inputted through the power switch by a predetermined signal when the power switch is turned on; Performing initialization based on a voltage of a power source signal processed in the processing step and generating a first control signal for receiving a main power; Processing the power input through the power cutoff unit based on the generated first control signal to convert the power into a plurality of voltages and outputting the signals; Disconnecting the switch unit and the power cutoff unit based on the generated first control signal and maintaining the connection between the switch unit and the rectifier unit; And operating the apparatus or the system normally using a power supplied through the connected switch unit. 11. The method according to claim 10, And rectifying, smoothing, and transforming the input commercial AC power. 10. The method of claim 9, Disconnects the switch unit and the rectifying unit and maintains the connection between the switch unit and the power cutoff unit when the power of the apparatus or the system is turned off or the operation of the apparatus or the system is normally terminated, And turning off the power of the power cutoff unit.

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