Electroless control method of compressor

A control method and compressor technology, applied in motor generator control, electronically reversing motor control, pump control, etc., can solve problems such as heavy workload, no detailed derivation of dq axis current, and cumbersome matching of compressors

Active Publication Date: 2021-09-07
SHENZHEN ZHENBANG TECH
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  • Claims
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Problems solved by technology

[0003] However, the existing technology does not deduce the given method of the dq-axis current in detail. The given value of the dq-axis current can only be obtained offline, and it needs to be experimented, tested and corrected at different operating points and stored in the lookup table for online calling.
In this way, the matching of compressors becomes extremely cumbersome, and the workload is heavy. There is an urgent need for a method that can perform dq-axis current distribution online.

Method used

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  • Electroless control method of compressor
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  • Electroless control method of compressor

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Embodiment Construction

[0020] like figure 1 As shown, the flow chart of the electrolytic control method of the compressor provided by the present invention is described in detail as follows:

[0021] A strategy for generating dq-axis currents for compressor control. At this time, the bus bar is a small film capacitor, which is only a few tenths of the traditional electrolytic capacitor, and the pulsation of the bus bar is very large. However, the relevant indicators of the compressor control must first be realized, and the harmonic requirements of the incoming line current on the grid side must also be met. . Traditional dq-axis current generation strategies are no longer applicable.

[0022] Through the combination of motor control algorithm and power factor control, firstly, through system modeling and theoretical analysis, the relationship between the instantaneous power of the compressor running and the input phase of the grid is calculated, and the feedforward components of the given dq axis ...

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Abstract

The invention is suitable for the field of improvement of a non-electrolysis control technology, and provides a non-electrolysis control method of a compressor. The method comprises the following steps: S1, calculating a relation between instantaneous power of compressor operation and a power grid input phase through system modeling and theoretical analysis, and calculating a feed-forward component given by dq axis current; S2, taking an output result of input current closed-loop control as a given part of dq-axis current, and realizing the vector control of the compressor and the harmonic requirement of the grid-side incoming line current to complete the control of the compressor. A motor control algorithm is combined with power factor control, a relation between compressor operation instantaneous power and a power grid input phase is calculated theoretically, a feed-forward component given by dq-axis current is calculated, and then a closed-loop control result of input current is also used as a given part of the dq-axis current; therefore, the vector control of the compressor and the harmonic wave requirement of the grid-side incoming line current are realized at the same time.

Description

technical field [0001] The invention belongs to the technical improvement field of electrolysis control, and in particular relates to an electrolysis control method of a compressor. Background technique [0002] The master's thesis "High Power Factor Control of Air-conditioning Permanent Magnet Compressor Drive System without Electrolytic Capacitor" is the result of a cooperation project between Harbin Institute of Technology and Guangdong Midea Refrigeration Equipment Co., Ltd. The idea is to perform Fourier decomposition of the current in dq according to the double frequency of the grid frequency, and take the DC component and the fundamental wave component as the given current in dq. After experiments, the grid waveform sine degree and power factor obtained by this method Both are higher. [0003] However, the existing technology does not deduce the given method of dq-axis current in detail. The given value of dq-axis current can only be obtained offline, and it needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/14H02P21/22F04B49/06H02P23/26
CPCH02P21/0003H02P21/22H02P21/14F04B49/06H02P23/26Y02E40/40
Inventor 陈玮钰李云欢
Owner SHENZHEN ZHENBANG TECH
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