Control system and parameter identification method of permanent magnet synchronous motor
A permanent magnet synchronous motor and parameter identification technology, which is applied in the control system, electronic commutation motor control, single motor speed/torque control, etc., can solve the problems of poor operating conditions, increased noise, and parameter identification Problems such as low precision
Active Publication Date: 2018-02-02
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology
The inaccurate parameters of the permanent magnet synchronous motor will cause problems such as poor motor operation, increased noise, and reduced efficiency.
In the prior art, the parameter identification accuracy of the permanent magnet synchronous motor is low, so there is a need for improvement in the prior art in order to more accurately identify the resistance, inductance and back EMF coefficient of the permanent magnet synchronous motor
Method used
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Embodiment Construction
[0057] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0058] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...
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The invention brings forward a control system of a PMSM. The system comprises a current sampling module for sampling three-phase current Ia, Ib and Ic; a first coordinate conversion module for performing coordinate conversion on the three-phase current Ia, Ib and Ic when an electric angle is zero so as to obtain direct axis current Id and quadrature axis current Iq; a second coordinate conversion module for performing coordination conversion on direct-axis voltage Vd and quadrature axis voltage Vq when the electric angle is zero so as to obtain three-phase reference voltage Va, Vb and Vc; an inversion module for performing power amplification on the three-phase voltage Va, Vb and Vc so as to obtain three-phase voltage U, V and W; a parameter identification module for obtaining direct axis inductance according to the direct axis voltage Vd and the direct axis current Id; and a DC power supply module for supplying DC power to the inversion module. In such a way, high-precision parameters can be obtained, and a basis is provided for accurate estimation of positions and parameter self-setting of an electric current loop and a speed loop. The invention also brings forward a parameter identification method of the PMSM.
Description
technical field [0001] The invention relates to the technical field of electric appliances, in particular to a control system of a permanent magnet synchronous motor and a parameter identification method of the permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have the advantages of high power density, wide speed range, high efficiency, small size, fast response and reliable operation. They are widely used in AC drive applications such as household appliances, CNC machine tools, industrial robots, electric vehicles and aviation equipment. application. During the operation of a permanent magnet synchronous motor, rotor position detection is an essential link, and sensors are usually required to detect the rotor magnetic pole position of the motor. However, in some special occasions, such as high temperature sealing, dust environment and other special occasions, installing a rotor position sensor on the permanent magnet sync...
Claims
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IPC IPC(8): H02P6/08H02P6/182
CPCH02P6/08H02P6/182
Inventor 杨辉
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD