A full-frequency-domain constant-torque control system and method for an air-conditioning inverter compressor

A variable frequency compressor and control system technology, applied in pump control, liquid variable capacity machinery, mechanical equipment, etc., can solve problems such as large difference in current peak and peak fluctuation, shutdown, etc., to achieve stable current, improve reliability, The effect of reducing power consumption

Active Publication Date: 2016-08-31
HAIER GRP CORP +1
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  • Abstract
  • Description
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Problems solved by technology

[0009] The purpose of the present invention is to provide a full-frequency domain constant torque control method for an air-conditioning variable-frequency compressor, which solves the problem that the peak and peak fluctuations of the current in each cycle vary greatly during the high-frequency operation of the existing air-conditioning compressor. Under the current situation, the technical problem that causes the compressor current to reach the compressor demagnetization or the current protection value of the power module to stop

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  • A full-frequency-domain constant-torque control system and method for an air-conditioning inverter compressor
  • A full-frequency-domain constant-torque control system and method for an air-conditioning inverter compressor
  • A full-frequency-domain constant-torque control system and method for an air-conditioning inverter compressor

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Embodiment Construction

[0026] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Such as image 3 As shown: the full frequency domain constant torque control system of the air conditioner inverter compressor of this embodiment includes: a current vector control unit and a constant torque control unit.

[0028] The constant torque control unit includes a pulsating current calculation unit and a current compensation command generating unit. The pulsating current calculation unit calculates the pulsating current based on the motor current, and passes the difference between 0 and the pulsating current through the current compensation command generating unit to form a current command for reducing current ripple.

[0029] Among them, the motor current is obtained by sampling the compressor bus current by the current sampling part through the sampling circuit and calculating it according to the bus current and the motor paramete...

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Abstract

The invention relates to an air conditioner inverter compressor frequency-domain constant torque control system and method. The air conditioner inverter compressor frequency-domain constant torque control system comprises a current vector control portion and a constant torque control portion; the constant torque control portion outputs a current command which is used for reducing current pulse and adds the current command which is used for reducing the current pulse and an input signal of the current vector control portion to serve as input of the current vector control portion; the current vector control portion outputs a voltage control command to control a compressor. The improved constant torque compensation control method can be applied to a full frequency domain of a compressor; the constant torque control portion compensates currents to an input end of the current vector control portion; during a high band operation process, the currents are stable, a wave crest value at every period is uniformly distributed, the compressor stably operates.

Description

Technical field [0001] The invention belongs to the technical field of air conditioner compressor variable frequency drive control, and specifically relates to a constant torque control method of an air conditioner variable frequency compressor in the full frequency domain. Background technique [0002] Air conditioners have become a global product. However, air conditioners account for 23% of the energy consumption of household appliances. Energy-saving technology has always been a key research topic for air-conditioning companies. [0003] The current high efficiency methods of DC inverter compressors include: [0004] 1) Use high-performance magnets to increase magnetic flux; [0005] 2) Improve the coil winding method, increase the slit occupation rate, use thick copper wire, and increase the number of winding turns; [0006] 3) Reduce inductance and improve the utilization of motor voltage; [0007] The above methods of improving the efficiency of inverter compressors increase the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06
Inventor 王友宁程永甫刘聚科许国景
Owner HAIER GRP CORP
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