CN203838499U - Power supply system and linear control module - Google Patents

Abstract

A power supply system, linear control module is connected with a power supply device, the power supply device includes a AC/DC power supply conversion module, a switch element, a control signal output end, a main power supply output end and a standby power supply output end, the AC/DC power supply conversion module has a power output end, the switch element is connected with the power output end of the AC/DC power supply conversion module and the main power supply output end, the standby power supply output end is connected with the power output end of the AC/DC power supply conversion module, the linear control module includes a control switch, a first resistor, a capacitor and a second resistor, the control switch is connected with the control signal output end, the first resistor is connected with the control switch, the capacitor is connected with the power output end of the AC/DC power supply conversion module and the first resistor, the second resistor is electrically connected to the switching element, the first resistor and the capacitor.

Description

Power supply system and linear control module

technical field

The utility model relates to a power supply system, in particular to a power supply system with low standby power consumption.

Background technique

Referring to FIG. 1 , it is a circuit diagram of an existing switch control circuit. The switch control circuit 1 is electrically connected between a DC power VDC and a switch element 10 , and the switch control circuit 1 is used to control the switch element 10 to be turned on or off, and then determine whether the DC power VDC is connected to an electronic system PS. Wherein, the electronic system PS is electrically connected to the drain of the switch element 10 through the output resistors Ro1 and Ro2, and the terminals connected between the electronic system PS and the output resistors Ro1 and Ro2 are defined as power output terminals Vo1 and Vo2.

The switch control circuit 1 includes a sense resistor RS, a control switch Q, a resistor R and a capacitor C. One end of the sensing resistor RS is electrically connected to the DC power source VDC and the source of the switching element 10 , and the other end of the sensing resistor RS is electrically connected to the drain of the control switch Q and the gate of the switching element 10 . The source of the control switch Q is electrically connected to the ground terminal, and the gate of the control switch Q is electrically connected to a control signal output terminal Sin. One end of the resistor R and the capacitor C is electrically connected to the gate of the control switch Q, and the other end of the resistor R and the capacitor C is electrically connected to the ground. In other words, the resistor R and the capacitor C are connected in parallel, It is used to filter the noise of the signal output from the control signal output terminal Sin.

When the power conversion system PS starts up, the control signal output terminal Sin sends a control signal to the control switch Q to drive the control switch Q to conduct. At the same time, the switching element 10 will also be turned on. In other words, when the switch control circuit 1 receives the control signal, the control switch Q and the switching element 10 will be turned on almost at the same time. However, this makes the DC power supply VDC The voltage drops suddenly, as shown in Figure 2.

Utility model content

The purpose of this utility model is to provide a linear control module and a power supply system, the linear control module is electrically connected to a power supply device for supplying DC power, to solve the problem of the electronic system electrically connected to the power supply device starting In an instant, the DC power supply has a problem of sudden drop.

In order to achieve the above purpose, the utility model provides a linear control module, which is electrically connected to a power supply device, and the power supply device includes: an AC/DC power conversion module, a switching element, a control signal output terminal, a main power supply output terminal and a standby power output terminal, the AC/DC power conversion module has a power output terminal, the switching element is electrically connected to the power output terminal of the AC/DC power conversion module and the main power output terminal, and the standby power output The terminal is electrically connected to the power output terminal of the AC/DC power conversion module, wherein the linear control module includes:

A control switch electrically connected to the control signal output end;

a first resistor electrically connected to the control switch;

a capacitor electrically connected to the power output terminal of the AC/DC power conversion module and the first resistor; and

A second resistor is electrically connected to the power output terminal of the AC/DC conversion module, the switch element, the first resistor and the capacitor.

The above linear control module further includes a discharge circuit electrically connected to the power output end, the control signal output end, the capacitor, the first resistor and the second resistor of the AC/DC conversion module.

The linear control module above, wherein the discharge circuit includes:

a switching element electrically connected to the power output end and the signal output end of the AC/DC conversion module; and

A third resistor electrically connected to the switching element, the first resistor, the capacitor and the second resistor.

In the above linear control module, the switching element is a metal oxide semiconductor field effect transistor.

The above-mentioned linear control module further includes a protection switch electrically connected to the power output end, the switching element and the capacitor of the AC/DC conversion module.

In the above linear control module, the protection switch is a diode.

To achieve the above purpose, the utility model also provides a power supply system, which has the linear control module described in any one of claims 1 to 6, and is electrically connected to an AC power supply and an electronic system, characterized in that the The power supply system includes:

An AC/DC conversion module electrically connected to the AC power supply, the AC/DC conversion module includes a power output terminal;

a switching element electrically connected to the power output end;

A power manager, electrically connected to the electronic system and the switch element, the power manager includes a control signal output terminal;

a controller electrically connected to the power manager and the AC/DC conversion module;

a main power output terminal electrically connected to the switching element and the electronic system; and

A standby power output terminal is electrically connected to the power output terminal and the electronic system.

The above power supply system further includes an isolation unit located at the power manager and the controller, and electrically connected to the power manager and the controller.

In the aforementioned power supply system, the AC/DC conversion module includes:

an electromagnetic interference filter electrically connected to the AC power supply;

a rectifier electrically connected to the EMI filter; and

A DC/DC power converter is electrically connected to the rectifier, and the DC/DC power converter includes the power output terminal.

The power supply system and the linear control module provided by the utility model can solve the problem that the direct current power supply suddenly drops at the moment of start-up of the electronic system electrically connected to the power supply device.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

Figure 1 shows a circuit block diagram of an existing power supply system;

Fig. 2 is a waveform diagram corresponding to the DC power supply of Fig. 1 and the voltage at the output end of the power supply;

Fig. 3 depicts the circuit block diagram of the power supply system of the content of the present utility model;

Fig. 4 shows the circuit diagram of the linear control module of the first embodiment of the content of the present utility model;

5 is a circuit diagram of a linear control module according to a second embodiment of the present invention;

Fig. 6 corresponds to the waveform diagram of the voltage output from the power output terminal and the output terminal of the main power supply shown in Fig. 4 and Fig. 5;

FIG. 7 illustrates linear control signals of switching elements.

Among them, reference signs

1 switch control circuit

3 Power supply system

5 Power supply unit

50 AC/DC power conversion module

500 EMI filter

502 rectifier

503 power factor correction circuit

504 power converter

506 Power Manager

52 controller

54 switching elements

56 Power Manager

58 isolation unit

7, 7a Linear control module

70 discharge circuit

ACP power supply unit

C, C1 capacitor

D protection switch

PS electronic system

Q, Q1 control switch

R resistor

Ro1, Ro2 main power output resistors

Ro3 Standby power output resistor

R1 first resistor

RS Second resistor

R3 third resistor

VDC DC power supply

Vdc power output terminal

Vo1, Vo2 power output

V1, V2 main power output

Vsb Standby power output terminal

Detailed ways

The above and additional objects, features and advantages of the disclosure of the present invention will be better understood through the following illustrative and non-limiting detailed description of preferred embodiments of the disclosure of the present invention with reference to the accompanying drawings.

With reference to Fig. 3, it is a circuit block diagram of the power supply system of the content of the utility model. The power supply system 3 includes a power supply device 5 and a linear control module 7 . The linear control module 7 is used to control the working state of a switch element 54 of the power supply device 5 .

The power supply device 5 is electrically connected between an AC power supply ACP and an electronic system PS for receiving the AC power output by the AC power supply ACP, and converting the AC power to the electronic system PS.

The power supply device 5 includes an AC/DC power conversion module 50, a controller 52, a switch element 54, a power manager 56, an isolation unit 58, a plurality of main power output resistors Ro1 and Ro2, at least one main power output terminal, a standby power output resistor Ro3 and a standby power output terminal Vsb. In this embodiment, the power supply device 5 includes two main power output terminals V1 and V2 as an example for illustration.

The AC/DC power conversion module 50 includes an EMI filter 500 , a rectifier 502 and a power converter 504 . The EMI filter 500 is electrically connected to the AC power supply ACP, the rectifier 502 is electrically connected to the EMI filter 500 and the controller 52 , and the power converter 504 is electrically connected to the rectifier 502 and the controller 52 . The EMI filter 500 receives the AC power output by the AC power supply ACP, and filters out the EMI components present in the AC power. The rectifier 502 converts the AC power that passes through the EMI filter 500 and removes the EMI components into DC power. The rectifier 502 may include a power factor correction circuit 503 to reduce the output current.

The power converter 504 is a DC/DC power converter 504. The power converter 504 receives the DC power passing through the rectifier 502, and changes the voltage value of the power output from the power output terminal Vdc according to the control of the controller 52, such as boosting the power output terminal. The voltage value of the power output by Vdc (boost) or reduce the voltage value of the power output terminal Vdc (step down). The power converter 504 can be, for example (but not limited to), an LLC resonant power converter, a dual forward converter (Dual Forward Converter) or a single forward converter (Single Forward Converter).

The switch element 54 is electrically connected to the power output terminal Vdc of the AC/DC power conversion module 50 . The main power output resistors Ro1 and Ro2 are electrically connected to the switch element 54 and the main power output terminals V1 and V2 respectively, the main power output terminals V1 and V2 are electrically connected to the electronic system PS, and the standby power output resistor Ro3 is electrically connected to the AC/DC The power output terminal Vdc and the standby power output terminal Vsb of the power converter module 50 .

In addition, it should be noted that the power supply system 3 of the present utility model can not only include two main power output terminals V1 and V2. In actual implementation, users can increase the number of main power output terminals according to actual needs. The number of mains output resistors connected to the mains output must be increased accordingly.

In this embodiment, the voltage level of the power output from the output terminal Vsb of the standby power supply may be the same as the voltage level of the power output from the output terminals V1 and V2 of the main power supply, or the voltage level of the power output from the output terminal Vsb of the standby power supply may be different. It is the same as the power voltage level output from the output terminals V1 and V2 of the main power supply. When the voltage level of the power output from the output terminal Vsb of the standby power supply is different from the voltage level of the power output from the output terminals V1 and V2 of the main power supply, there can be a connection between the AC/DC power conversion module 50 and the output resistor Ro3 of the standby power supply. A step-up circuit or a step-down circuit is provided to increase or decrease the voltage level of the power output from the output terminal Vsb of the standby power supply.

The power manager 56 is electrically connected to the AC/DC power conversion module 50 , the electronic system PS and the isolation unit 58 . The power manager 56 includes a signal output terminal PG, a signal input terminal PS_on and a control signal output terminal Sin, the signal output terminal PG and the signal input terminal PS_on are respectively electrically connected to the electronic system PS, and the control signal output terminal Sin is electrically connected to the linear control module7. The signal output terminal PG is used to transmit the signal output by the power manager 56 to the electronic system PS, and the signal input terminal PS_on is used to receive the signal from the electronic system PS.

The linear control module 7 is electrically connected to the switch element 54 and the power manager 56 . The linear control module 7 receives a control signal output by the control signal output terminal Sin of the power manager 56, and selects to close or open the switching element 54 according to the control signal, and then cuts off or conducts the output from the main power supply output terminals V1 and V2 to Electricity of the electronic system PS.

The isolation unit 58 is electrically connected to the power manager 56 and the controller 52, and is used to transmit the signal sent by the power manager 56 to the controller 52 in an isolated manner. In addition, the isolation unit can also transmit the signal sent by the controller 52 to the controller 52 in isolation. Power Manager 56.

In actual operation, when the switch element 54 is turned off, the DC power output by the power output terminal Vdc of the AC/DC power conversion module 50 cannot be transmitted to the electronic system PS through the output terminals V1 and V2 of the main power supply; otherwise, when the switch element When 54 is turned on, the DC power output by the power output terminal Vdc of the AC/DC power conversion module 50 can be transmitted to the electronic system PS through the main power output terminals V1 and V2. In addition, no matter whether the switch element 54 is turned on or off, the standby power output terminal Vsb will output power to the electronic system PS.

Referring to FIG. 4 , it is a circuit diagram of the linear control module according to the first embodiment of the content of the present invention. For the convenience of illustration, FIG. 4 also shows the switch element 54 , the main power output resistors Ro1 and Ro2 , the main power output terminals V1 and V2 , the standby power output terminal Vsb and the standby power output resistor Ro3 . Meanwhile, FIG. 4 also shows the power output terminal Vdc of the AC/DC conversion module 50 and the control signal output terminal Sin of the power manager 56 . In this embodiment, the switch element 54 is illustrated by using a P-type Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) as an example, and it is not limited to this in actual implementation.

The linear control module 7 includes a control switch Q1, a first resistor R1, a capacitor C1 and a second resistor RS, the control switch Q1 is electrically connected to the control signal output terminal Sin, and the first resistor R1 is electrically connected to the control switch Q1, the capacitor C1 is electrically connected to the power output terminal Vdc of the AC/DC conversion module 50 and the switch element 54, the second resistor RS is electrically connected to the capacitor C1, the first resistor R1 and the switch element 54, and is connected in parallel to the capacitor C1.

In this embodiment, the control switch Q1 is an NMOS field effect transistor, and the gate of the control switch Q1 is electrically connected to the control signal output terminal Sin, and the drain of the control switch Q1 is electrically connected to the first resistor R1 , the source of the control switch Q1 is electrically connected to the ground terminal. In actual implementation, the control switch Q1 may also be other electronic components with a switching function.

Referring to FIG. 3 and FIG. 4 together, when the electronic system PS is started, the signal input terminal PS_On of the power manager 56 will receive the start signal sent by the electronic system PS. Afterwards, the control signal output terminal Sin of the power manager 56 sends a control signal to the control switch Q1 of the linear control module 7 to drive the control switch Q1 to conduct. When the control switch Q1 is turned on, the capacitor C1 starts to charge, and the voltage between the gate and the source of the switching element 54 rises. Secondly, when the control switch Q1 is turned on, the first resistor R1 and the second resistor R2 form a voltage divider circuit, so by properly configuring the resistance values of the first resistor R1 and the second resistor RS, it is possible to control The voltage difference between the gate and the source of the switching element 54 is used to control the switching element 54 to be turned on, and at the same time prevent the switching element 54 from being damaged due to excessive voltage. When the switch element 54 is turned on, the main power output terminals V1 and V2 output power to the electronic system PS.

By using the capacitor C1, the first resistor R1 and the second resistor RS, the voltage difference between the source and the gate of the switching element 54 can be increased gently and linearly, so as to prevent the switching element 54 from being activated in the electronic system PS Instantaneous conduction, so that the voltage value output by the power output terminal Vdc can be prevented from suddenly dropping suddenly when the electronic system PS is started.

Referring to FIG. 6 , the solid line shows the voltage corresponding to the power output terminal Vdc in FIG. 3 , and the dotted line shows the voltage corresponding to the main power output terminals V1 and V2 in FIG. 3 . Compared with Fig. 2, the voltage output by the power output terminal Vdc shown in Fig. 6 does not have the problem of instantaneous sudden drop at the moment of starting the electronic system PS, which can provide the stability of the power supply system 3 and avoid the power supply system 3 Malfunction due to voltage drop. Therefore, the linear control module 7 of the present invention can effectively avoid the situation that the voltage value output by the power output terminal Vdc drops suddenly at the moment when the electronic system PS is started.

Conversely, when the electronic system PS is not activated (that is, the electronic system PS is operating in a standby state), the power manager 56 controls the signal output terminal Sin to send a control signal to the control signal input terminal Sin of the linear control module 7 . The linear control module 7 receives the aforementioned control signal, and drives the control switch Q1 to be turned off. When the control switch Q1 is turned off, the switch element 54 is turned off, and the main power output terminals V1 and V2 have no power output; otherwise, only the standby power output terminal Vsb outputs power to the electronic system PS.

Thus, when the electronic system PS is not activated, the main power supply output terminals V1 and V2 will not provide power to the electronic system PS, and only the standby power supply output terminal Vsb supplies the power of the electronic system PS when it is in a standby state. In this way, Can effectively achieve energy saving effect.

Referring to FIG. 5 , it is a circuit diagram of the linear control module according to the second embodiment of the present invention. For the convenience of illustration, FIG. 5 also shows the switch element 54 , the main power output resistors Ro1 and Ro2 , the main power output terminals V1 and V2 , the standby power output terminal Vsb and the standby power output resistor Ro3 . Meanwhile, FIG. 4 also shows the power output terminal Vdc of the AC/DC conversion module 50 and the control signal output terminal Sin of the power manager 56 .

In addition, the linear control module 7 a of this embodiment is similar to the linear control module 7 of the first embodiment, and the same elements are marked with the same symbols. The difference between the linear control module 7 a of this embodiment and the linear control module 7 of the first embodiment is that the control module 7 a of this embodiment further includes a discharge circuit 70 .

The discharge circuit 70 is electrically connected to the power output terminal Vdc, the control signal output terminal Sin, the capacitor C1 and the first resistor R1 of the AC/DC conversion module 50 , and the discharge circuit 70 serves as a discharge path for the capacitor C1 .

The discharge circuit 70 includes a switching element Q2 and a third resistor R3. The switching element Q2 is electrically connected to the power output terminal Vdc, the control signal output terminal Sin and the control switch Q1 of the AC/DC conversion module 50. The third resistor R3 is electrically connected to Connected to the control switch Q1, the first resistor R1, the second resistor RS and the capacitor C1. In this embodiment, the switching element Q2 is a metal oxide field effect transistor, the gate of the switching element Q2 is electrically connected to the control signal output terminal Sin and the control switch Q1, and the source of the switching element Q2 is electrically connected to the AC/DC conversion module The power output terminal Vdc of 50, the drain of the switching element Q2 is electrically connected to the third resistor R3.

The discharge circuit 70 provides a discharge path for the charge stored in the capacitor C1 to accelerate the discharge of the capacitor C1. In this way, when the power supply system restarts within a short time after the electronic system PS is turned off, the switching element 54 cannot be linearly turned on due to the incomplete discharge of the capacitor C1, resulting in the occurrence of a voltage output from the DC power output terminal Vdc. Instantly plummeted.

In addition, the linear control module 7 a further includes a protection switch D electrically connected to the power output terminal Vdc of the AC/DC conversion module 50 , the switching element Q2 and the capacitor C1 . In this embodiment, the protection switch D is, for example (but not limited to) a diode, and the anode of the protection switch D2 is electrically connected to the power output terminal Vdc, and the cathode of the protection switch D is electrically connected to the switching element Q2 and the capacitor C1. When the electronic system PS is short-circuited, the power output terminal Vdc generates a large current output, and the protection switch D2 can prevent the capacitor C1 from being effectively discharged when the electronic system PS is short-circuited and the power output terminal Vdc outputs a large current, which means protection The switch D2 allows the capacitor C1 to still be discharged through the discharge circuit 70 when the electronic system PS is short-circuited. Therefore, when the short-circuit of the electronic system PS is eliminated and restarted, the switching element 54 will be linearly turned on to avoid power output. The voltage value output by the terminal Vdc suddenly drops suddenly at the moment when the electronic system PS is started.

In addition, the present invention further provides a linear conduction method of the switch element, which is suitable for the circuit structure of the linear control module shown in FIG. 4 and FIG. 5 . The linear control method is used to control the switching element electrically connected to the secondary side of the AC/DC conversion module. The AC/DC conversion module has a power output terminal on the secondary side, as shown in FIG. 3 .

The switching element receives the power output from the power output terminal, and when the electronic system PS is started, the main power supply output terminal outputs the aforementioned power to the electronic system PS to supply the operating power of the electronic system PS in the starting state; and in the electronic system PS When operating in the standby state, stop outputting power from the output terminal of the main power supply to the electronic system PS.

The linear control method of the switching element is used to control the switching state of the switching element 54, so that the switching element 54 is turned on linearly, so that the switching element 54 operates in a safe operating area, thereby preventing the switching element 54 from being damaged due to overheating. The linear control method of the switch element 54 firstly provides a driving voltage, and provides a plurality of pulse width modulation (PWM) control signals to the switch element 54 in sequence. Switching the duty cycle of the pulse width modulation signals, so that the duty cycle of the pulse width modulation signals increases from 0% to 100% in sequence, as shown in Figure 7, so that the driving voltage increases linearly, so as to drive the switching element 54 is turned on linearly. In this embodiment, the time for the duty cycle of the control signal to increase from 0% to 100% is about 20 milliseconds (ms).

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (9)

1. a Linear Control module, be electrically connected on a power supply device, this power supply device comprises: an AC/DC power transfer module, one on-off element, one control signal output terminal, one primary power output terminal and a standby power output terminal, AC/DC power transfer module has a power output end, this on-off element is electrically connected on this power output end and this primary power output terminal of this AC/DC power transfer module, this standby power output terminal is electrically connected on this power output end of this AC/DC power transfer module, it is characterized in that, this Linear Control module comprises:

One gauge tap, is electrically connected on this control signal output terminal;

One first resistor, is electrically connected on this gauge tap;

One capacitor, is electrically connected on this power output end and this first resistor of this AC/DC power transfer module; And

One second resistor, is electrically connected on this power output end, this on-off element, this first resistor and this capacitor of this AC/DC modular converter.

2. Linear Control module according to claim 1, is characterized in that, more comprises a discharge circuit, is electrically connected on this power output end, this control signal output terminal, this capacitor, this first resistor and this second resistor of this AC/DC modular converter.

3. Linear Control module according to claim 2, is characterized in that, this discharge circuit comprises:

One switching device, is electrically connected on this power output end and this signal output part of this AC/DC modular converter; And

One the 3rd resistor, is electrically connected on this switching device, this first resistor, this capacitor and this second resistor.

4. Linear Control module according to claim 3, is characterized in that, this switching device is metal oxide semiconductcor field effect transistor.

5. Linear Control module according to claim 4, is characterized in that, more comprises a protection switch, is electrically connected on this power output end, this switching device and this capacitor of this AC/DC modular converter.

6. Linear Control module according to claim 5, is characterized in that, this protection switch is diode.

7. a power system, has the Linear Control module described in claim 1～6 any one, is electrically connected on an AC power supply and an electronic system, it is characterized in that, this power system comprises:

One AC/DC modular converter, is electrically connected on this AC power supply, and this AC/DC modular converter comprises a power output end;

One on-off element, is electrically connected on this power output end;

One power supervisor, is electrically connected on this electronic system and this on-off element, and this power supervisor comprises a control signal output terminal;

One controller, is electrically connected on this power supervisor and this AC/DC modular converter;

One primary power output terminal, is electrically connected on this on-off element and this electronic system; And

One standby power output terminal, is electrically connected on this power output end and this electronic system.

8. power system according to claim 7, is characterized in that, more comprises an isolated location, is positioned at this power supervisor and this controller, and is electrically connected on this power supervisor and this controller.

9. power system according to claim 8, is characterized in that, this AC/DC modular converter comprises:

One Electromagnetic interference filter, is electrically connected on this AC power supply;

One rectifier, is electrically connected on this Electromagnetic interference filter; And

One direct current/DC power converter, is electrically connected on this rectifier, and this DC-DC power supply changeover device comprises this power output end.