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Control device, control method, and computer-readable recording medium

A control device and one-sided technology, which are applied in control systems, AC motor control, emergency protection circuit devices, etc., can solve the problems that the inverter is not suitable for driving the motor and the system is in abnormal state.

Inactive Publication Date: 2019-05-28
MITSUBISHI HEAVY IND THERMAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the inverter may not properly drive the motor, and the system may become abnormal

Method used

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  • Control device, control method, and computer-readable recording medium
  • Control device, control method, and computer-readable recording medium
  • Control device, control method, and computer-readable recording medium

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0029] Embodiments will be described in detail below with reference to the drawings.

[0030] First, the configuration of the outdoor unit used in the air conditioning system including the control device according to the first embodiment of the present invention will be described.

[0031] Such as figure 1 As shown, the outdoor unit 1 (target device) according to this embodiment includes an AC power supply 10 , an AC (Alternative Current)-DC (Direct Current) converter 20 , an inverter 30 , a motor 40 and a control device 50 .

[0032] The AC power supply 10 generates an AC voltage and outputs it to the AC-DC converter 20 .

[0033] The AC-DC converter 20 includes a reactor 201 , a rectifier diode stack 202 and a capacitor 203 .

[0034] The rectifier diode stack 202 included in the AC-DC converter 20 rectifies the AC voltage input from the AC power supply 10 .

[0035] The reactor 201 and the capacitor 203 constitute a smoothing filter for suppressing harmonics of the AC po...

no. 2 approach

[0087] Next, the structure of the outdoor unit used for the air-conditioning system provided with the control apparatus according to the 2nd Embodiment of this invention is demonstrated.

[0088] Such as Figure 8 As shown, like the outdoor unit 1 according to the first embodiment, the outdoor unit 1 according to the second embodiment of the present invention includes an AC power supply 10, an AC-DC converter 20, an inverter 30, a motor 40, and a control device. 50.

[0089] However, the control device 50 according to the second embodiment further includes a detection unit 508 in addition to the control device 50 according to the first embodiment.

[0090] Furthermore, the detection unit 501 is connected between the switching element 302 and the negative voltage side terminal of the AC power supply 10 . Therefore, the current corresponding to the U phase in the inverter 30 flows from the switching element 302 to the negative voltage side terminal of the AC power supply 10 vi...

no. 3 approach

[0117] Next, the structure of the outdoor unit used for the air conditioning system provided with the control apparatus according to the 3rd Embodiment of this invention is demonstrated.

[0118] Such as Figure 12 As shown, the outdoor unit 1 according to the third embodiment of the present invention includes an AC power supply 10, an AC-DC converter 20, an inverter 30, a motor 40, and a control device, similarly to the outdoor unit 1 according to the first embodiment. 50.

[0119] However, the control device 50 according to the third embodiment further includes a sensor 509 , two multiplexers 510 and 511 , and a sensor voltage conversion unit 512 in addition to the control device 50 according to the first embodiment.

[0120] The sensor 509 detects current or voltage other than the motor current of the motor 40 in the outdoor unit 1 . The sensor 509 detects, for example, a motor current of a motor other than the motor 40 included in the outdoor unit 1 . Furthermore, the s...

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PUM

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Abstract

A control device, a control method and a program are provided. The control device in an air conditioning system of an inverter drive motor can detect abnormal actions when at least one of one or more A / D conversion circuits acts abnormally and can safely stop the air conditioning system. The control device is provided with one or more A / D conversion parts and a determining part. The A / D conversion parts convert a voltage detected by a voltage detection unit from analogue values into digital values in a circuit of a target device. The determining part calculates the average value of the digital values after conversion by the A / D conversion parts, and determines that the A / D conversion parts acts abnormally when a difference between the calculated average value and a reference value of an average value pre-determined by a voltage in a certain period.

Description

technical field [0001] The invention relates to a control device, a control method and a computer-readable recording medium. Background technique [0002] In a system in which an inverter drives a motor, a control signal for controlling a switching element constituting an inverter that drives the motor is generated. For example, in an air conditioning system including an air conditioner (hereinafter referred to as an air conditioner), a control signal for controlling a switching element constituting an inverter for driving a compressor motor in a compressor is generated. Generally, the inverter detects various voltages (analog values) in the system in order to control the motor so that it operates according to the state of the system. Furthermore, it is necessary to generate a control signal for controlling the switching elements constituting the inverter based on the detected voltage. At this time, an A / D conversion circuit that converts a voltage that is an analog value ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/06H02H7/08
CPCH02H7/0844H02P27/06
Inventor 林茂树川岛一允
Owner MITSUBISHI HEAVY IND THERMAL SYST
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