Motor rotor position determination method and device based on excitation system
A motor rotor and excitation system technology, applied in the direction of single motor speed/torque control, control system, motor control, etc., can solve the problems of motor reliability decline, main motor mechanical structure changes, etc., to improve reliability, Avoid the effects of unreliable factors
Active Publication Date: 2021-12-14
TSINGHUA UNIV
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[0003] In the related art, the method for obtaining the initial position of the rotor of the main motor includes installing a position sensor on the main motor to detect the initial position of the rotor of the main motor. drop in reliability
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[0081] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0082] At present, the generators commonly used in medium and large aircraft are multi-stage electric excitation brushless synchronous motors. The multi-stage electric excitation brushless synchronous motor can start the aeroengine through electric operation, realize the integration of starting and power generation, thereby simplifying the accessory casing and bleed air device of the engine. In order to achieve starting control, various multi-stage motor structures have been proposed, such as three-stage electric excitation brushless synchronous motors. The three-stage str...
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The invention relates to a motor rotor position determination method and device based on an excitation system, computer equipment and a storage medium. The method comprises the following steps: collecting a first three-phase stator current and a second three-phase stator current of an exciter within a preset time length, and calculating a first exciter counter electromotive force and a second exciter counter electromotive force according to a three-phase symmetrical voltage applied to a stator side of the exciter and a stator voltage equation of the exciter; respectively inputting the first exciter back electromotive force and the second exciter back electromotive force into a low-pass filter to obtain a first change condition and a second change condition; and extracting the position of the motor rotor in a preset current change and position form according to the first change condition and the second change condition. The method does not depend on the salient polarity of the motor, and unreliable factors caused by disappearance or reversal of the salient polarity of the main motor are avoided. And the initial position of the main motor rotor can be estimated under the static condition of the main motor rotor, so that the starting control requirement of the main motor is met, and the operation reliability of the main motor is improved.
Description
technical field [0001] The present application relates to the technical field of AC motor drive control, in particular to a method and device for determining the position of a motor rotor based on an excitation system. Background technique [0002] At present, the generators commonly used in medium and large aircraft are multi-stage electric excitation brushless synchronous motors. The multi-stage electric excitation brushless synchronous motor can start the aeroengine through electric operation, realize the integration of starting and power generation, thereby simplifying the accessory casing and bleed air device of the engine. In order to achieve starting control, various multi-stage motor structures have been proposed, such as three-stage electric excitation brushless synchronous motors. The three-stage structure refers to the coaxial installation of the main motor, exciter and auxiliary exciter. Among them, The exciter rotor winding and the main motor rotor winding are ...
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IPC IPC(8): H02P6/08H02P6/18H02P6/182
CPCH02P6/08H02P6/182H02P6/183H02P2203/03H02P2203/11
Inventor 毛帅李建秋徐梁飞胡尊严胡家毅张前欧阳明高
Owner TSINGHUA UNIV