Parameter self-adaptation method in the running process of DC variable frequency compressor
A technology of DC frequency conversion in the operation process, applied in the field of compressors, can solve problems such as the inability to self-adaptively adjust compressor motor parameters, and achieve the effect of avoiding low efficiency
Active Publication Date: 2018-07-27
四川长虹空调有限公司 +1
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem that the prior art cannot realize the self-adaptive adjustment of the motor parameters of the compressor during the operation of the DC inverter compressor
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[0029] The specific implementation process of the method for parameter self-adaptation during the running process of the DC inverter compressor of the present invention will be further described in detail below.
[0030] Before the DC variable frequency compressor starts to run, firstly preset the electromagnetic quantity and magnetic flux of the motor. After the compressor is running, its real-time inductance and magnetic flux will change as the running time progresses. During the operation of the compressor, the U-phase current and the W-phase current of the compressor motor are detected in real time, and the current detection can be realized by using a current sensor or a shunt resistor. After calculating the U-phase current and W-phase current of the compressor motor, calculate the V-phase current of the motor according to the U-phase current and W-phase current, and the V-phase current of the motor is equal to the sum of the U-phase current and the W-phase current negati...
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The invention relates to a compressor, and aims to solve the problem that the prior art cannot realize self-adaptive adjustment of motor parameters of the compressor during the running process of the DC frequency conversion compressor. The method for parameter self-adaptation during the running process of the DC inverter compressor provided by the present invention includes the following specific steps: first, during the running process of the compressor, the U-phase current and the W-phase current of the compressor motor are detected in real time, and according to the The U-phase current and the W-phase current calculate the V-phase current of the motor; then, coordinate transformation is performed on the U-phase current, W-phase current and V-phase current to obtain the DQ axis current; finally, according to the compressor parameters and the The DQ axis current is calculated to obtain the DQ axis inductance under the current current, and the calculated inductance is used to correct the parameter preset inductance. The invention is suitable for direct current variable frequency compressors.
Description
technical field [0001] The invention relates to a compressor, in particular to a method for self-adapting parameters of a DC frequency conversion compressor using a permanent magnet synchronous motor. Background technique [0002] DC inverter compressors have been widely used in the field of air conditioning. The DC frequency conversion compressor is driven by a DC motor. The specific driving method is: firstly convert the power frequency commercial power into a DC power supply and send it to the power module. Power supply, this DC power is sent to the DC motor of the compressor to control the displacement of the compressor. [0003] Because the compressor uses a DC motor, and by providing different driving voltages to the retention motor to obtain a suitable compressor working displacement. Compared with fixed-frequency compressors, DC variable-frequency compressors can make the motor run at a higher speed when the current temperature is greatly different from the require...
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IPC IPC(8): H02P21/14
Inventor 李越峰高向军赵静邓平林志强何雄军
Owner 四川长虹空调有限公司