Control method of permanent magnet assisted synchronous reluctance motor
A technology for assisting synchronous and reluctance motors, applied in motor control, motor generator control, AC motor control, etc., can solve the inaccurate rotor position, affect the accuracy of the motor control phase angle, and do not consider the resolver rotor position deviation, etc. problem, to achieve the effect of improving accuracy
Active Publication Date: 2022-03-15
CRRC YONGJI ELECTRIC CO LTD
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[0004] The rotor position positioning and correction methods currently used do not consider the rotor position deviation caused by system errors such as resolver sampling and transmission errors, control algorithm interruption delay, and modulation algorithm interruption delay. Therefore, the obtained rotor position is inaccurate, which affects Motor Control Phase Angle Accuracy
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[0058] In order to make the purpose, technical solutions and advantages 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 embodiments of the present invention. Obviously, the described embodiments are part of the implementation of the present invention. example, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0059] figure 1 The structure diagram of the control system of the permanent magnet assisted synchronous reluctance motor corresponding to the control method of the permanent magnet assisted synchronous reluctance motor provided by the present invention, such as figure 1 As shown, the control system of the permanent magnet assisted synchronous reluctance motor includes: ...
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The present invention provides a method for controlling a permanent magnet assisted synchronous reluctance motor. The method includes: acquiring a permanent magnet according to a control interruption period, a pulse width modulation PWM carrier period, and the current angular velocity of the rotor of the permanent magnet assisted synchronous reluctance motor. The compensation phase angle of the rotor of the auxiliary synchronous reluctance motor; according to the compensation phase angle, the current actual phase angle is obtained; according to the current d-axis voltage given value and the current q-axis voltage given value, the current expected phase angle is obtained; according to the current expected phase angle The proportional deviation between the angle and the current actual phase angle, and the current actual phase angle is corrected online. The invention takes the sampling delay, transmission delay and algorithm delay of the resolver into consideration, and corrects the actual phase angle online to ensure that the actual phase angle is consistent with the expected phase angle, thereby improving the accuracy of the motor control phase angle.
Description
technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a control method for permanent magnet assisted synchronous reluctance motors. Background technique [0002] Due to its advantages of high power density, high power factor, strong overload capacity and high efficiency, permanent magnet assisted synchronous reluctance motors are increasingly used in the field of rail transportation. In the field of high-power permanent magnet-assisted synchronous reluctance motor traction system, because of its own multi-stage motor structure, it is easy to cause large rotor positioning errors, and the stator-rotor separated multi-pole resolver position detection system is used in design and manufacture. There are non-ideal error factors in installation and debugging and digital decoding, which will also affect the detection accuracy of the rotor position of the resolver, and then affect the accuracy of the motor control...
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IPC IPC(8): H02P21/18H02P25/08H02P27/08
CPCH02P21/18H02P25/08H02P27/08H02P2203/03
Inventor 路瑶张吉斌苑伟华张瑞峰王龙刚杨高兴张亚斌张巧娟柴璐军
Owner CRRC YONGJI ELECTRIC CO LTD