Speed-sensor-free control method for self-adaptive sliding mode gain permanent magnet synchronous motor
A permanent magnet synchronous motor, no speed sensor technology, used in motor control, motor generator control, electronic commutation motor control and other directions, can solve the problem of large sliding mode chattering, unstable phase current output, and sliding mode observer observation. Low precision, etc.
Active Publication Date: 2020-10-30
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology
The existing permanent magnet synchronous motor adaptive sliding mode observer control method has the following disadvantages: 1. The sliding mode chattering in the sliding mode observation control system is relatively large; 2. The phase current output is unstable, and there are 3. The observation accuracy of the sliding mode observer is low; 4. A fixed adaptive factor is used in the whole system. However, the adaptive sliding mode gain is not used to make the adaptive factor change according to the change of the control system. Variety
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[0025] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0026] Such as figure 2 As shown, an adaptive sliding mode gain permanent magnet synchronous motor speed sensorless control method. Including: the measured current output link of the motor, the observed current output link estimated by the motor model, and the adaptive sliding mode gain control part. In order to match the measured current with t...
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The invention discloses a speed-sensor-free control method for a self-adaptive sliding mode gain permanent magnet synchronous motor. The method comprises the following steps of: acquiring three-phasestator current of a tested motor; obtaining a measurement current through Clark transformation; calculating an observed current value by using a motor mathematical model, calculating a sliding mode gain adaptive rate K, and applying the sliding mode gain adaptive rate K to the motor mathematical model in the step S2 to correct a current error value between the measured current value and the observed current value, so that the current error value is gradually close to zero. The self-adaptive sliding mode gain observer adopted by the invention can enable the tested motor to configure a self-adaptive gain factor in real time, so that the sliding mode buffeting phenomenon is better overcome, and the observation precision is improved; and meanwhile, a current curve obtained by the self-adaptivesliding mode gain observer is smoother, the buffeting content is lower, and operation is more stable.
Description
technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a speed sensorless control method of an adaptive sliding mode gain permanent magnet synchronous motor. Background technique [0002] The adaptive sliding mode observer control method of permanent magnet synchronous motor is a very common method used in the existing permanent magnet synchronous motor control. The sliding mode observer is a kind of dynamic system that obtains the estimated value of the state variable according to the measured value of the external variable (input variable and output variable) of the system, also known as the state reconstructor. The sliding mode observer not only provides the practical possibility for the technical realization of state feedback, but also has been practically applied in many aspects of control engineering. The sliding mode observer can obtain an estimate of the internal state of a given system by measuring the inp...
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IPC IPC(8): H02P21/00H02P21/13H02P21/14H02P21/22H02P6/34
CPCH02P21/001H02P21/13H02P21/14H02P21/22H02P6/34H02P2207/05H02P2205/01
Inventor 申永鹏王延峰叶晨光胡智宏刘普杨小亮张志艳邱洪波赵俊杜海明武洁郭磊磊郑竹风李元丰王前程王帅兵刘迪
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY