Hybrid control method for open-phase fault-tolerant operation of dual three-phase permanent magnet synchronous motor
A dual-three-phase permanent magnet, synchronous motor technology, applied in the direction of motor generator control, AC motor control, electronic commutation motor control, etc., can solve the problems of reducing the torque range, unable to obtain stator copper consumption, etc., to achieve the reduction of stator The effect of copper consumption
Active Publication Date: 2022-04-26
XIAN UNIV OF TECH
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The MT strategy control goal is to obtain the largest possible torque output range under the condition of phase loss fault operation, but cannot obtain the minimum stator copper loss, while the ML control strategy ensures the minimum stator copper loss for each torque value, but with Reduced torque range at the expense of
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[0078] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0079] The hybrid control method for the phase-deficiency and fault-tolerant operation of the double-three-phase permanent magnet synchronous motor of the present invention is specifically implemented according to the following steps:
[0080] Step 1. Assume that when the F phase fails, the main circuit topology of the dual-three-phase permanent magnet synchronous motor system changes from that shown in Figure 1(a) to that shown in Figure 1(b). After a single-phase phase-loss fault occurs, the detected remaining 5-phase currents are first decoupled using the vector space of the single-phase phase-loss state to decouple the stationary transformation matrix T 5s , mapped to the α-β sub-plane and z1-z2 harmonic sub-plane related to electromechanical energy conversion, the variables in the α-β sub-plane are transformed by rotating coordinate tran...
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The invention discloses a hybrid control method for open-phase fault-tolerant operation of a dual three-phase permanent magnet synchronous motor, and the method comprises the steps: dividing an output torque range, employing an ML strategy between 0-0.542 (p.u.), employing a hybrid control strategy between 0.542-0.694 (p.u.), obtaining the proportion of the output torque of the MT strategy in the hybrid control strategy according to the total output torque T when the hybrid control strategy is employed, and obtaining the proportion of the output torque of the MT strategy in the hybrid control strategy according to the total output torque T; and then a z1-z2 sub-plane current reference value corresponding to the MT strategy output torque is obtained. The z1-z2 sub-plane current reference value corresponding to the ML strategy is zero, so that the z1-z2 sub-plane current reference value corresponding to the MT strategy is the z1-z2 sub-plane current reference value in the hybrid control strategy; according to the invention, the maximum output torque range under the condition of a single-phase open-phase fault is realized, and meanwhile, the stator copper loss of the output torque range of the dual three-phase motor between 0.542-0.694 (p.u.) is reduced.
Description
technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a hybrid control method for phase-deficiency and fault-tolerant operation of a double-three-phase permanent magnet synchronous motor. Background technique [0002] With the rapid development of industrial high-power and high-reliability electric drive systems, compared with traditional three-phase motor drive systems, multi-phase motors have the advantages of high power density, low voltage high power, low torque ripple and high fault tolerance. , It has very broad development prospects in aerospace, wind power generation, electric vehicles and other fields. Among all kinds of multi-phase motors, the double three-phase motor with a phase shift of 30° is an asymmetrical six-phase motor, which eliminates the 5th and 7th harmonic magnetic potential inside, and then eliminates the 6th harmonic torque ripple. It has a greater advantage in torque ripple and thus has ...
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IPC IPC(8): H02P21/22H02P21/00H02P25/024
CPCH02P21/22H02P21/0003H02P25/024
Inventor 周长攀史奔奔景国秀陈圣安刘海峰孙向东
Owner XIAN UNIV OF TECH