A deep field weakening control device and method for a permanent magnet synchronous motor
A permanent magnet synchronous motor and field weakening control technology, which is used in motor generator control, control of electromechanical transmission, electronic commutation motor control, etc. Slow and other problems to achieve the effect of improving stability
Active Publication Date: 2020-09-15
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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Problems solved by technology
During high-speed flux-weakening operation, the parameter changes of the motor and the cross-coupling of the D-axis and Q-axis will reduce the control stability, slow down the dynamic response speed, and reduce the torque control accuracy. The traditional vector control based on dual current regulators is difficult to meet High Performance Drive Control Requirements
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[0015] In order to further clearly illustrate the features of the technical solution, the following will provide specific embodiments combined with the accompanying drawings to illustrate the present invention, but it should not be construed as a limitation of the present invention.
[0016] A permanent magnet synchronous motor deep field weakening control device of the present invention is composed of a torque correspondence table, a polar coordinate controller and a dynamic controller, and does not include the D-axis current regulator in the traditional vector control, as shown in the attached figure 1 shown. The polar coordinate controller is composed of two parts: a regulator and a polar coordinate transformation, such as figure 2 shown. The regulator adopts PID regulator, PI regulator or integrator, its input is iq error, output is β, fixed value vs and β are used as input of polar coordinate transformation, D axis voltage vd0 and Q axis voltage vq are polar coordinate ...
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The invention discloses a deep field weakening control device and method for a permanent magnet synchronous motor. The deep field weakening control device comprises a torque correspondence table, a polar coordinate controller and a dynamic controller, wherein the polar coordinate controller is formed by an adjuster and polar coordinate transformation. The deep field weakening control method for apermanent magnet synchronous motor can improve the stability, the dynamic response speed and the torque control accuracy of high speed field weakening operation of the permanent magnet synchronous motor, and is applicable to an electric vehicle, a hybrid vehicle and other transport and communication devices taking the permanent magnet synchronous motor as the driving power.
Description
technical field [0001] The invention belongs to the technical field of power electronic equipment and its control, and in particular relates to a deep field weakening control device for a permanent magnet synchronous motor and a control method thereof. Background technique [0002] Permanent magnet synchronous motors are widely used in electric vehicles, ship propulsion and other fields. Commonly used three-phase permanent magnet synchronous motors are generally powered by inverters. Current sensors and position sensors collect the signals required for control and send them to the control circuit of the inverter. Calculation and adjustment are performed through the all-digital control chip to obtain the inverter The PWM drive signal of the power device controls the frequency phase and amplitude of the power supply voltage of the permanent magnet synchronous motor, and then controls its current and torque. [0003] When used for direct drive, the permanent magnet synchronous...
Claims
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IPC IPC(8): H02P21/00
CPCH02P21/0003
Inventor 朱磊肖烨然刘忠举
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST