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Short-circuit compensation control method of four-phase permanent-magnetic fault-tolerant motor

A permanent magnet fault-tolerant and consistent technology, applied in the direction of AC motor control, single motor speed/torque control, control system, etc., can solve problems such as difficult software programming and complex algorithms, and achieve the effect of short-circuit fault fault-tolerant control

Active Publication Date: 2013-12-04
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing fault-tolerant control strategy is limited to open-circuit faults, and the algorithm is complex, requiring multiple complex iterations to obtain a given current applied to the normal phase winding. The entire control process is not easy to program in software

Method used

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  • Short-circuit compensation control method of four-phase permanent-magnetic fault-tolerant motor

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Embodiment Construction

[0025] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0026] like figure 1 Shown, the system block diagram of the fault-tolerant control system of the present invention, i a * i b * i c * i d * are command currents of A, B, C, and D phases respectively, i a i b i c i d are the actual currents of A, B, C, and D phases detected by the Hall current sensor respectively, and the i can be obtained by the adder * The value of -i is used as the input of the current hysteresis comparator, and the power device is turned on and off through the output of the current hysteresis comparator.

[0027] like figure 2 As shown, the stator of the four-phase permanent magnet fault-tolerant motor involved in the present invention adopts concentrated windings, and the radially opposite stator poles in space are connected in series to form a phase, and the phases are independent (this independence includes ...

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Abstract

The invention discloses a short-circuit compensation control method of a four-phase permanent-magnetic fault-tolerant motor. A concentrated winding is adopted to be connected with an independent H-bridge-driving inverter to realize complete fault isolation. When a winding of a certain phase is in a short-circuit fault, a big short-circuit current may be generated at the phase to cause unbalanced running of the motor. By utilizing a torque equivalence principle and adjusting amplitude values and phase positions of other non-fault-phase currents, equivalence in electromagnetic torque output by the motor before and after faults is realized to realize short-circuit fault-tolerant control.

Description

technical field [0001] The invention relates to a motor short-circuit compensation control method, in particular to a four-phase permanent magnet fault-tolerant motor short-circuit compensation control method. Background technique [0002] In recent years, with the rapid development of AC motor speed control technology, research on multi-electric and all-electric aircraft has become a hot topic in the aviation field. One of the key technologies of the multi-electric aircraft system is the design of the electric actuation system. Since the electric actuation system is widely used in key electric drive systems such as aircraft brakes, rudder surface control, and oil pumps, once a fault occurs, the motor will run without phase after the fault, and the output torque will fluctuate greatly, resulting in large mechanical noise , The overall performance of the system is greatly reduced, or even unable to work, causing heavy losses. Therefore, the electric actuation system must ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P23/00H02P25/02
Inventor 吉敬华刘文庆赵文祥朱纪洪王壮
Owner JIANGSU UNIV
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