Variable carrier frequency motor control device and method
A carrier frequency, motor control technology, applied in the direction of AC motor control, control system, general control strategy, etc., can solve problems such as large switching loss and high power consumption of motor control circuit boards
Active Publication Date: 2020-07-14
四川长虹精密电子科技有限公司 +1
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Problems solved by technology
Since power semiconductor devices have switching losses, the higher the switching times of power semiconductor devices per unit time, the greater the switching loss and the greater the power consumption of the motor control circuit board
Method used
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[0030] The motor control device with variable carrier frequency of the present invention has a structural block diagram such as figure 1 , including a control module, a storage module, a test instrument and a motor, the storage module and the motor are respectively connected to the control module, and the test instrument is connected to the motor;
[0031] The control module is used to control the starting and running of the motor, obtain the minimum target carrier frequency that can meet the requirements of starting the motor at full load and the minimum target carrier frequency that can meet the normal operation of the motor in each speed range, and debug according to the corresponding minimum target carrier frequency The corresponding PI loop parameters and filter cut-off frequency, and the debugged optimal PI loop parameters, filter cut-off frequency and corresponding minimum target carrier frequency are respectively recorded in the storage module for loading when the motor...
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The invention relates to the field of motor control, and specifically relates to a variable carrier frequency motor control device and method. According to the invention, different carrier frequencies, PI ring parameters and filter cut-off frequencies are adopted at different stages and different rotating speeds of a motor, so the overall performance of the motor is greatly optimized, the overallpower consumption of the motor is reduced, and the service life of the motor is prolonged. The technical scheme is summarized in that the device comprises a control module, a storage module, a test instrument and a motor; the storage module and the motor are connected with the control module; the test instrument is connected with the motor; the control module is used for controlling the motor to start running, and obtaining the minimum target carrier frequency at different stages and different rotating speeds; the storage module is used for storing minimum target carrier frequencies corresponding to different rotating speeds in different stages and debugged PI ring parameters and filter cut-off frequencies, and the test instrument is used for outputting a motor performance fluctuation curve graph.
Description
technical field [0001] The technology of the invention relates to the field of motor control, in particular to a motor control device and method for variable carrier frequency. Background technique [0002] With the improvement of living standards, various household appliances have been used by more and more families, and energy saving and efficiency enhancement have long been the development trend of the household appliance industry. With the rapid development of power electronics technology and new semiconductor devices, frequency conversion speed regulation technology has been continuously improved and improved, and gradually perfected frequency converters have been widely used in frequency conversion speed regulation motors due to their good output waveforms and excellent performance-price ratio. . The refrigerator and air-conditioning industries have developed from fixed-frequency compressors to variable-frequency compressors, and are still improving energy efficiency ...
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IPC IPC(8): H02P27/08H02P23/00H02P25/024
CPCH02P27/085H02P23/0004H02P25/024
Inventor 石海兵刘祥邓曦
Owner 四川长虹精密电子科技有限公司