KR100246407B1 - Output control device and method of linear compressor using external temperature of motor - Google Patents

Abstract

The present invention relates to an apparatus and method for controlling output of a linear compressor using an external temperature of a motor. In the related art, a motor constant is changed according to a temperature, and thus, there is a problem in that it cannot be controlled to have a constant amplitude according to a use condition. Therefore, in the present invention, by using the temperature detected by attaching a temperature sensor to the outside of the compressor or the motor, the constant constant motor constant can be estimated and used to perform amplitude-independent amplitude control to obtain stable characteristics of the compressor. It is.

Description

Output control device and method of linear compressor using external temperature of motor

The present invention relates to an apparatus and method for controlling the output of a linear compressor using an external temperature of a motor to control the amplitude according to the temperature generated when driving the linear compressor using a magnet, so as to obtain the characteristics of a stable compressor. The present invention relates to a linear compressor output control device and a method using an external temperature of a motor which is controlled to have a constant amplitude by estimating and using a motor constant using a temperature detected by attaching a temperature sensor to the outside.

In the conventional sensorless control of a linear compressor using a magnet, voltage and current are measured using Equation (1) below, and control is performed using the measured voltage and current.

V : Motor terminal voltage v : Speed of moving parts, R : Motor resistance i Current α : Motor Constant

L : Motor Inductance

In Equation (1), the speed and the movement of the moving unit can be obtained as follows.

x : Movement of moving part

As described above, the voltage and the current are measured, and the output of the linear compressor using the magnet is controlled using the measured voltage and current.

However, since the motor constant α, which is an important constant in the linear compressor using a magnet in the prior art as described above, changes with temperature as shown in FIG. 3, the compressor cannot be controlled to have a constant amplitude according to the use conditions. There is a problem that you cannot get the output.

Therefore, an object of the present invention for solving the conventional problems as described above is to attach a temperature sensor to the outside of the compressor or motor to estimate the motor constant in consideration of the ambient temperature as well as the temperature generated during the compressor operation irrespective of the temperature The present invention provides an apparatus and method for controlling output of a linear compressor using an external temperature of a motor that can always perform stable output control of a compressor.

1 is a block diagram of an output control apparatus for a linear compressor using an external temperature of a motor of the present invention.

Figure 2 is an operation of the output control method of the linear compressor using the external temperature of the motor of the present invention.

3 is a characteristic diagram of a temperature constant according to temperature in FIG. 1;

*** Explanation of symbols for main parts of drawing ***

10: voltage control unit 20: voltage sensor

30: current sensor 40: temperature sensor

50: stroke calculation unit 60: microcomputer

70: drive unit COMP: compressor

The present invention for achieving the above object is a first step of storing the input stroke, a second step of compensating the stroke stored in the first step in proportion to the temperature data detected from the temperature sensor, and the second And a third step of controlling the drive output of the compressor using the stroke compensated in the step.

The present invention also provides a voltage control unit for supplying a driving voltage for driving a compressor, a voltage sensor for detecting a voltage at a compressor input stage when the compressor is driven, a current sensor for detecting a current generated when the compressor is driven, and a A temperature sensor which is attached to the outside and detects not only the ambient temperature but also the temperature generated by the compressor operation, a stroke calculator which receives the voltage output from the voltage sensor and the current output from the current sensor, and calculates a stroke; A microcomputer for compensating and outputting the stroke provided by the calculation unit according to the detected temperature output from the temperature sensor, and adjusting the amplitude of the voltage drive signal for controlling the operation of the compressor according to the compensated stroke output from the microcomputer. This voltage controlled signal is amplitude controlled It characterized in that a drive unit configured to output to the voltage control unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a flowchart illustrating a method of controlling an output of a linear compressor using an external temperature of a motor of the present invention. As shown in FIG. 2, a first step S1 of storing an input stroke and a first step S1 of FIG. In the second step (S2) and the stroke compensated in the second step (S2) for compensating the stored stroke in proportion to the temperature data by the ambient temperature detected by the temperature sensor and the temperature of the compressor operation A third step S3 of controlling the drive output of the compressor is performed.

Thus, the output control device of the linear compressor using the external temperature of the motor of the present invention for performing the method consisting of each step, as shown in Figure 1, the voltage control unit for supplying a driving voltage for driving the compressor (COMP) ( 10), a voltage sensor 20 for detecting a voltage at the compressor input terminal when the compressor is driven, a current sensor 30 for detecting a current generated when the compressor is driven, and the compressor. Attached to the outside of the temperature sensor 40 for detecting not only the ambient temperature but also the temperature generated by the compressor (COMP) operation, the voltage output from the voltage sensor 20 and the current output from the current sensor 30, respectively The stroke calculation unit 50 which receives the input and calculates the stroke, and compensates the stroke provided by the stroke calculation unit 50 in accordance with the detected temperature output from the temperature sensor 40 to output According to the microcomputer 60 and the compensated stroke output from the microcomputer 60, the amplitude of the voltage driving signal for controlling the driving of the compressor COMP is adjusted, and the voltage driving signal whose amplitude is adjusted is read out. It consists of the drive part 70 which outputs to the voltage control part 10. FIG.

Referring to the operation and effect of the present invention configured as described in detail as follows.

When the voltage controller 10 supplies a driving voltage for driving the compressor COMP, the compressor COMP operates by the driving voltage.

When the compressor COMP operates, the voltage generated at the time is detected by the voltage sensor 20 and output to the stroke calculator 50, and the current is detected by the current sensor 30 to detect the current. Will output

In addition, the temperature sensor 40 detects the temperature generated during the operation of the compressor COMP and its ambient temperature, and outputs the detected temperature data to the microcomputer 60.

Then, the stroke calculator 50 receives the voltage detected by the voltage sensor 20 and the current detected by the current sensor 30, respectively, and calculates a stroke using the received voltage and current.

Accordingly, the stroke calculator 70 outputs the stroke calculated above to the microcomputer 60.

Accordingly, the microcomputer 60 compensates the stroke provided from the stroke calculator 70 by the temperature data received from the temperature sensor 40, and outputs the compensated stroke to the driver 70.

Accordingly, the driving unit 70 adjusts the amplitude of the driving voltage signal to be output by the stroke provided from the microcomputer 60, and outputs the voltage driving signal whose amplitude is adjusted to the voltage controller 10.

Accordingly, the voltage controller 10 sets a driving voltage according to the voltage driving signal provided from the driving unit 70, and outputs the set driving voltage to the compressor 40 to operate the driving voltage.

Thus, by using the temperature sensor 40 to adjust to a constant amplitude in consideration of the temperature generated by the compressor (COMP) operation and the ambient temperature it is possible to obtain a stable compressor characteristics.

Here, an operation process for compensating the stroke in order to control the output of the linear compressor in the microcomputer 60 will be described with reference to FIG. 2.

First, the microcomputer 60 receives and stores the stroke calculated by the stroke calculator 50 (S1).

Then, from the temperature sensor 40 receives the temperature data for the temperature generated during the operation of the compressor (COMP) and its ambient temperature (S2).

Then, the stroke stored in the step S1 is compensated with a stroke proportional to the temperature data received from the temperature sensor 40 (S3), and this control stroke is set to the stroke to be controlled, and then the control stroke is driven. Output to 70. (S4)

As a result, it is possible to control the stable output of the compressor by controlling the amplitude for output control of the linear compressor in consideration of the temperature generated during the operation of the compressor (COMP) and its ambient temperature.

Therefore, according to the present invention, it is possible to perform amplitude-independent amplitude control by estimating and using a constant motor constant by using a temperature detected by attaching a temperature sensor to the outside of a compressor or motor. There is an effect that allows you to gain talent.

Claims (2)

A voltage controller for supplying a driving voltage for driving the compressor, a voltage sensor for detecting a voltage generated when the compressor is driven, a current sensor for detecting a current generated when the compressor is driven, and an external device attached to the outside of the compressor A temperature sensor which detects not only the temperature but also the temperature generated by the compressor operation, a stroke calculator which receives the voltage output from the voltage sensor and the current output from the current sensor, and calculates a stroke, and the stroke calculator Microcomputer for compensating the stroke according to the detected temperature output from the temperature sensor and output, and a drive unit for outputting a voltage drive signal for controlling the drive of the compressor according to the compensated stroke output from the microcomputer to the voltage controller Of the motor, characterized in that Output control apparatus of a linear compressor using the unit temperature. A compressor using a first step of storing the input stroke, a second step of compensating the stroke stored in the first step in proportion to the temperature data detected from the temperature sensor, and a stroke compensated in the second step. And a third step of controlling the drive output of the linear compressor output control method using the external temperature of the motor.

Images