A control method for a DC inverter air conditioner compressor
An air-conditioning compressor and control method technology, which is applied in the direction of motor generator control, electronic reversing motor control, control system, etc., can solve the problems of high energy consumption for compressor start-up, device impact, etc., so as to improve the service life and balance the overall heat generation Effect
Active Publication Date: 2019-04-12
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a control method for a DC inverter air conditioner compressor, which overcomes the problems in the prior art that the energy consumption of the compressor is too large to start and it is easy to cause impact on the device
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[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0029] For a DC inverter air conditioner, the compressor needs to go through multiple on-load startup and shutdown processes during the entire operation process. see figure 1 Shown is a functional block diagram of an embodiment of a control method for a DC inverter air conditioner compressor disclosed in the present invention. As shown in the fi...
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The present invention provides a control method for a direct-current variable frequency air-conditioning compressor. The control method comprises: in a rotor positioning stage and a rotor stationary stage, controlling a set current of a phase in a motor to be a maximum value and the sum of actual currents that flow through three phases to be equal to zero; if electromagnetic torque is smaller than load torque in the process where a controller determines that the current of the motor is amplified in a starting stage, automatically restarting the motor, and adding three-phase set currents in proportion in the restarting stage, and meanwhile controlling the set current of another phase of the motor to be the maximum value; and if the startup does not succeed when the frequency of automatic restart reaches a set value, outputting a fault signal. According to the control method, by maximizing the set currents of different phases during each loaded restart time and uniformly dividing the heat generation amount by a compressor motor winding and a variable frequency module of different phases during each loaded restart time on the premise of ensuring that the rotor is precisely positioned and does not jitter, the whole heat generation of the motor is balanced, and the service lives of the compressor and the variable frequency module are prolonged.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control method for a DC inverter air conditioner compressor. Background technique [0002] At present, in the inverter air conditioner, the compressor with built-in permanent magnet synchronous motor is used, and the vector control method without position sensor is adopted. The basic idea of permanent magnet synchronous motor vector control is based on the rotation coordinate transformation and the motor electromagnetic torque equation. In the permanent magnet synchronous motor, the motor is fed with three-phase AC current, the three-phase windings are strongly coupled, and at the same time coupled with the rotor magnetic field. That is to say, in the motor armature current, a part of the current is used to generate electromagnetic torque, and a part of the current is used to form a synthetic magnetic field with the rotor permanent magnet. [0003] When starting th...
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IPC IPC(8): H02P21/34
Inventor 耿焱时斌朱东涛肖成进国德防
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD