Stator-flux-oriented control of PMSM in traction - Experimental results

A control strategy of permanent magnet synchronous motors (PMSMs), which is different from the traditional vector control (VC) and direct torque control (DTC), is proposed. Firstly, the circular rotating magnetic field is analyzed on the simplified model and discredited into stepping magnetic field. The stepping magnetomotive force will drive the rotor to run as the stepping motor. Secondly, the stator current orientation is used to build the control model instead of rotor flux orientation. Then, the discrete current control strategy is set and adopted in positioning control. Three methods of the strategy are simulated in computer and tested on the experiment platform of PMSM. The control precision is also verified through the experiment.

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“…The stator current vector is given as formula (7). When = 0, = 0 and the motor stays at the initial position.…”

Section: Pointing Controlmentioning

confidence: 99%

“…Both methods are based on rotor flux which needs to be tested by an observer or to be controlled with other variables [6,7]. This paper proposes a strategy based on stator current frame and uses the discrete stator current to control the motor.…”

Section: Introductionmentioning

confidence: 99%

Discrete Current Control Strategy of Permanent Magnet Synchronous Motors

Dong

Jing

Sun

et al. 2013

Journal of Applied Mathematics

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A novel MTPA and flux weakening method of stator flux oriented control of PMSM

Wen

Zheng

Yang

et al. 2021

Transportation Safety and Environment

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Permanent magnet synchronous motor (PMSM) has the advantages of high efficiency, high power density and high reliability. It has been widely used in electric vehicles, rail transit, industrial transmission and other fields. Compared with the traditional PMSM control strategy, the Indirect stator-quantities control (ISC) of low torque ripple induction motor has high dynamic response performance in the whole speed range, with high stability and strong security. However, due to the inherent characteristics of PMSM, there are still some difficulties in applying ISC strategy, such as solving the load angle corresponding to the current torque, realizing the maximum torque per ampere (MTPA) control and flux weakening control method in the stator field oriented control algorithm of PMSM. In this paper, theoretical analysis and discussion are carried out for the above difficulties, and an indirect stator vector control (ISC) method for PMSM is proposed. Finally, combined with the electric drive application platform of electric vehicle, the simulation and experimental results verify that the proposed ISC control strategy of PMSM also has good dynamic and steady-state performance in the whole speed range.

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