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Torque control device and method of DC variable frequency compressor

A technology of torque control and DC frequency conversion, which is applied in the field of air-conditioning technology and frequency conversion control, which can solve the problems that the compressor cannot maintain torque balance and vibration at all times, and achieve the effects of improving low-frequency characteristics, reducing vibration, and improving service efficiency

Active Publication Date: 2007-07-18
HAIER GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a torque control device and method for a DC variable frequency compressor to overcome the defect in the prior art that the compressor cannot maintain the torque balance during operation and generate vibration

Method used

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  • Torque control device and method of DC variable frequency compressor
  • Torque control device and method of DC variable frequency compressor
  • Torque control device and method of DC variable frequency compressor

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail:

[0024] The system structure of the present invention is shown in FIG. 3 . The system includes a current sampling unit, a control unit, a DC power supply V, an intelligent frequency conversion module and a compressor. After the DC power supply V is frequency-converted by the intelligent frequency conversion module, it drives the operation of the compressor; the current sampling part samples the bus current of the intelligent frequency conversion module, and then sends the sampling current Idc to the control part for detection; the control part sends a control signal to the intelligent frequency conversion module , to control the driving voltage of the compressor. The control part also includes a current detection part and a position, torque calculation and frequency conversion control part. The current detection part detects the sampling cu...

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PUM

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Abstract

This invention relates to a torque control device and a method for DC frequency conversion compressors including a current sampling part and a control part, in which, an 180deg. sine wave DC conversion mode is applied to test the position of a compressor rotor timely and control is carried out by the applied drive voltage to the motor of the drive compressor so as to adjust the output torque of the compressor timely and the compressor can keep torque balance at any time in the process of operation.

Description

technical field [0001] The invention relates to the fields of air conditioning technology and frequency conversion control technology, in particular to a torque control device and method for a DC frequency conversion compressor. Background technique [0002] At present, DC inverter air conditioners are more and more popular among consumers because of their good energy saving, precise temperature control, ultra-low temperature start-up, and rapid heating. The main energy consumption of the DC inverter air conditioner is on the compressor, so improving the performance of the compressor is the focus of energy saving of the DC inverter air conditioner. The working process of the compressor is divided into three stages: suction, compression and exhaust. In each stage, the resistance torque of the rotor is not the same. If the driving torque of the rotor does not change with the change of the resistance torque of the rotor Adjustment will cause unbalanced force on the rotor, espe...

Claims

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Application Information

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IPC IPC(8): H02P27/06H02P23/00H02P21/05
Inventor 楚人震谷东照程永甫刘俊杰
Owner HAIER GRP CORP
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