Title:
FAULT-TOLERANT PERMANENT-MAGNET VERNIER CYLINDRICAL ELECTRIC MOTOR WITH ELECTROMAGNETIC SUSPENSION AND FAULT-TOLERANT VECTOR CONTROL METHOD FOR SHORT CIRCUIT OF TWO ADJACENT PHASES
Document Type and Number:
WIPO Patent Application WO/2018/018671
Kind Code:
A1
Abstract:
Disclosed are a fault-tolerant permanent-magnet vernier cylindrical electric motor with an electromagnetic suspension and a fault-tolerant vector control method for a short circuit of two adjacent phases. The method comprises: establishing a model of the electric motor; firstly deducing a popularization Clark transformation matrix by taking two non-adjacent phases that are equal in current amplitude value as a constraint condition according to the principles that the two phases are constant in magnetomotive force before and after an open-circuit fault and that a sum of non-fault-phase current is zero; converting a non-linear strong-coupling system of such an electric motor in a fault state into a one-order inertia system by using an internal model controller, a one-order inertia feed-forward voltage compensator and a counter potential observer; solving a short-circuit compensation voltage according to the principle that a synthetic magnetomotive force of a short-circuit compensation current of non-fault phases and current of two phases with a short circuit fault is zero; and superposing this voltage and output voltage of a vector controller. The fault-tolerant permanent-magnet vernier cylindrical electric motor with an electromagnetic suspension and the fault-tolerant vector control method for a short circuit of two adjacent phases suppress motor thrust ripples caused by a fault of two adjacent phases of an electric motor. More importantly, the dynamic performance and the steady-state performance thereof are consistent with those under a normal state, and the switching frequency of a voltage source inverter is constant.
Inventors:
ZHOU HUAWEI (CN)
LU ZHEN (CN)
LIU GUOHAI (CN)
ZHAO WENXIANG (CN)
JI JINGHUA (CN)
CHEN LONG (CN)
LU ZHEN (CN)
LIU GUOHAI (CN)
ZHAO WENXIANG (CN)
JI JINGHUA (CN)
CHEN LONG (CN)
Application Number:
PCT/CN2016/095626
Publication Date:
February 01, 2018
Filing Date:
August 17, 2016
Export Citation:
Assignee:
UNIV JIANGSU (CN)
International Classes:
H02K1/17; H02K1/16; H02K16/04; H02P21/00; H02P25/06
Foreign References:
| CN104578635A | 2015-04-29 | |||
| CN101882819A | 2010-11-10 | |||
| CN102916642A | 2013-02-06 | |||
| CN101404435A | 2009-04-08 | |||
| JP2015135159A | 2015-07-27 |
Other References:
XU, LIANG ET AL.: "Leading Design Parameter Analysis and Experimental Validation of a Fault Tolerant Permanent Magnet Vernier Machine", PROCEEDINGS OF THE CSEE, vol. 36, no. 18, 20 September 2016 (2016-09-20)
Attorney, Agent or Firm:
JW IP LAW FIRM (CN)
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