Single-loop speed control method, device and system for permanent magnet synchronous motor
A permanent magnet synchronous motor and control method technology, applied in the field of controllers, can solve the problems affecting the dynamic performance of the control system, affecting the dynamics of the quadrature axis current, complex structure, etc., so as to improve the speed control performance, reduce the difficulty of parameter adjustment, control the good performance
Active Publication Date: 2019-12-31
QINGDAO UNIV
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Problems solved by technology
[0005] However, the inventors found that most of the current sliding mode control methods for permanent magnet synchronous motors use the cascaded control structure of the speed loop and the current loop. When running at high speed, the coupling between the direct-axis current and the rotational speed is intensified, and affects the dynamics of the quadrature-axis current in a nonlinear form, thereby affecting the dynamic performance of the entire control system
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[0083] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0084] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0085] Implementation Example 1
[0086] A single-loop control method for permanent magnet synchronous motor sp...
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The invention discloses a permanent magnet synchronous motor rotating speed and current single loop control method. The method comprises the steps that the permanent magnet synchronous motor rotatingspeed, position and two-phase current are obtained; the permanent magnet synchronous rotating speed and the current of a motor under a two-phase synchronous rotating coordinate system are input to a disturbance observer to obtain an estimated disturbance variable; the expected reference rotating speed of the permanent magnet synchronous motor, the permanent magnet synchronous motor rotating speed,the current of the motor under the two-phase synchronous rotating coordinate system and the estimated disturbance variable are input to a sliding-mode speed controller to obtain a q-axis voltage value under the two-phase synchronous rotating coordinate system; and a d-axis voltage value is obtained, the q-axis voltage value and the d-axis voltage value are subjected to coordinate transformation to obtain the voltage of the motor under a two-phase static coordinate system, and the motor is driven to operate. According to the method, rapid tracking and controlling over the rotating speed and the current are achieved, the control performance is better, the parameter adjusting difficulty is reduced, and an effective way is provided for engineering implementation.
Description
technical field [0001] The invention relates to the technical field of controllers, in particular to a single-loop control method, device and system for the speed of a permanent magnet synchronous motor. Background technique [0002] The electric drive system is the core of the energy conversion unit of an electric vehicle. Its task is to convert the electric energy in the power battery of the electric vehicle into the kinetic energy on the wheels. The performance of the electric drive system is directly related to the power, comfort and safety of the vehicle. . Due to the advantages of high efficiency, high power density, high power factor, and good reliability, permanent magnet synchronous motors have become the main development trend of drive motors for electric vehicle drive systems. However, the operating conditions of electric vehicles are complex and random, and the permanent magnet synchronous motor itself is also a complex nonlinear, multivariable, strongly coupled...
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IPC IPC(8): H02P21/18H02P21/22H02P21/00H02P21/13
CPCH02P21/0007H02P21/13H02P21/18H02P21/22
Inventor 刘旭东于海生
Owner QINGDAO UNIV