Dual-winding BSRM suspending winding open-circuit fault fault-tolerant compensation method
A suspension winding, open-circuit fault technology, applied in the field of fault tolerance compensation, can solve the problems of lack of commutation of suspension force, slow dynamic response, large torque ripple, etc., to achieve the effect of simple method, fast dynamic response, and improved performance
Active Publication Date: 2016-11-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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[0004] The purpose of the present invention is to address the deficiencies of the above-mentioned background technology, provide a fault-tolerant compensation method for double-winding BSRM suspension winding open-circuit faults, realize reliable operation of double-winding bearingless switched reluctance motors under suspension winding open-circuit faults, and solve the problem with the help of mathematics. The scheme of the model to realize fault-tolerant control is complicated, the dynamic response is slow, the torque ripple is large, and the suspension force has technical problems such as lack of commutation
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[0023] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.
[0024] Such as figure 1 As shown, the present invention takes a 12 / 8-pole double-winding bearingless switched reluctance motor as the research object. The motor winding group is divided into three phases A, B, and C, and each phase is composed of four radially opposite tooth poles. Different from ordinary switched reluctance motors, in order to achieve rotor suspension, two sets of windings are wound on the motor, namely the main winding Nm and the suspension winding Ns. Taking phase A as an example, the main winding Nma is composed of coils on four tooth poles connected in series in forward direction, the suspension winding Nsa1 is composed of windings on two tooth poles diametrically opposite in the α direction, and Nsa2 is composed of coils in the β direction The windings on the two radially opposite tooth poles are reversely connected in series...
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The invention discloses a dual-winding BSRM suspending winding open-circuit fault fault-tolerant compensation method, and belongs to the technical field of fault-tolerant control of a switched reluctance motor. Through a direct toque control and direct suspension force control combined control mode, fault-tolerant operation of a dual-winding BSRM is realized during open-circuit fault of a set of suspending winding: selecting a basic voltage vector of each phase of main winding according to a torque hysteresis signal and a flux linkage hysteresis signal; selecting the suspending winding, which is in the same direction with the suspending winding in a fault phase, in a compensation phase as a compensation suspending winding; selecting the voltage vector of the suspending winding in the fault phase as the voltage vector of the suspending winding in the compensation phase; and selecting voltage vector of the other set of suspending winding in the fault phase according to the suspension force hysteresis signal. The method is simple and reliable, improves safety of the motor, expands application range of the bearingless switched reluctance motor in various fields, especially in the aspect of aerospace, and realizes reliable operation of the dual-winding bearingless switched reluctance motor under the suspending winding open-circuit fault.
Description
technical field [0001] The invention discloses a fault-tolerant compensation method for the open-circuit fault of a double-winding BSRM (Bearinless Switched Reluctance Motor, bearingless switched reluctance motor) suspension winding, and belongs to the technical field of fault-tolerant control of switched reluctance motors. Background technique [0002] The bearingless switched reluctance motor is a new type of magnetic levitation motor developed at the end of the 20th century. To realize its continuous rotation and stable levitation, the key is to control the torque and levitation force. [0003] At present, the bearingless switched reluctance motor mainly has the minimum magnetic potential, independent control and average suspension force control strategies. The levitation technology of bearingless switched reluctance motor has become mature day by day, and the research on its control strategy has become a current hot spot. For the bearingless switched reluctance motor, t...
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Login to View More IPC IPC(8): H02P25/08H02P29/028H02P27/12
CPCH02P25/08H02P27/12
Inventor 曹鑫周恒刘晨昊王雪瑞邓智泉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS