Virtual-Stator-Flux-Based Direct Torque Control of Five-Phase Fault-Tolerant Permanent-Magnet Motor With Open-Circuit Fault

2020 ◽  
Vol 35 (5) ◽  
pp. 5007-5017 ◽  
Author(s):  
Huawei Zhou ◽  
Cheng Zhou ◽  
Weiguo Tao ◽  
Jiabin Wang ◽  
Guohai Liu
Keyword(s):  
Permanent Magnet ◽  
Fault Tolerant ◽  
Direct Torque Control ◽  
Open Circuit ◽  
Torque Control ◽  
Permanent Magnet Motor ◽  
Stator Flux

scholarly journals Switching Sequence Model Predictive Direct Torque Control of IPMSMs for EVs in Switch Open-Circuit Fault-Tolerant Mode

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5593
Author(s):  
Ting Yang ◽  
Takahiro Kawaguchi ◽  
Seiji Hashimoto ◽  
Wei Jiang
Keyword(s):  
Fault Tolerant ◽  
Direct Torque Control ◽  
Open Circuit ◽  
Torque Control ◽  
Flux Linkage ◽  
Switching Sequence ◽  
Space Vectors ◽  
Stator Flux ◽  
Maximum Torque Per Ampere ◽  
Capacitor Voltage Balance

A switching sequence model predictive direct torque control (MPDTC) of IPMSMs for EVs in switch open-circuit fault-tolerant mode is studied in this paper. Instead of selecting one space vector from the possible four space vectors, the proposed MPDTC method selects an optimized switching sequence from two well-designed switching sequences, including three space vectors, according to a new designed cost function of which the control objectives have been transferred to the dq-axes components of the stator flux-linkage under the maximum-torque-per-ampere control. The calculation method of the durations of the adopted space vectors in the optimized switching sequence is studied to realize the stator flux-linkage reference tracking. In addition, the capacitor voltage balance method, by injecting a dc offset to the current of fault phase, is given. Compared with the conventional MPDTC method, the complicated weighting factors designing process is avoided and the electromagnetic torque ripples can be greatly suppressed. The experimental results prove the effectiveness and advantages of the proposed scheme.

Research on ALA+SPM Rotor Synchronous Motor Direct Torque Control

2010 ◽  
Vol 121-122 ◽  
pp. 866-871
Author(s):  
Xue Zhen Chen
Keyword(s):  
Permanent Magnet ◽  
Control Method ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Torque Control ◽  
Flux Linkage ◽  
Permanent Magnet Motor ◽  
Maximum Torque ◽  
Stator Current ◽  
Stator Flux

This paper compares the electromagnet torque characteristics of ALA+PM rotor synchronous motor with the conventional permanent magnet motor, the former holds on linearity relationship with the increase of the stator flux linkage, but the later needs restrict condition. The direct electromagnet torque control is the best control method for ALA+PM rotor synchronous motor, but the stator current can increase if the stator flux linkage is bigger or smaller than magnet flux linkage, the maximum torque current percent ampere control method is used to overcome the disadvantage.

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