Electro-magnetic doubly salient motor converter power tube and winding open-circuit fault diagnosis method

An electric excitation double salient pole and open circuit fault technology, which is applied in the direction of electric winding test, continuity test, etc., can solve problems such as failure diagnosis and research of armature winding open circuit fault, achieve low diagnosis cost, simple and accurate method, and improve stability Effect

Active Publication Date: 2022-05-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, the above-mentioned existing technologies mainly focus on the diagnosis of the open-circuit fault of the power tube in the converter, and cannot study the open-circuit fault diagnosis of the armature winding.

Method used

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  • Electro-magnetic doubly salient motor converter power tube and winding open-circuit fault diagnosis method
  • Electro-magnetic doubly salient motor converter power tube and winding open-circuit fault diagnosis method
  • Electro-magnetic doubly salient motor converter power tube and winding open-circuit fault diagnosis method

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Embodiment Construction

[0013] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] This application discloses a method for diagnosing power tube and winding open-circuit faults of electric excitation doubly salient motor converters. The method includes the following steps, please combine figure 1 The schematic diagram of the diagnostic logic is shown.

[0015] Step 1. Based on the principle of passing positive current in the rising region of inductance and passing negative current in the falling region of inductance, control the on-off of the corresponding power tube and armature winding in the converter of the electrically excited double salient pole motor, and obtain the electric excitation double salient pole motor Positive bus current i in the current operating state dc and the freewheeling current i of the low-side diode fw The difference current i m = i dc -i fw , where the direction in which the current ...

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Abstract

The invention discloses a doubly salient electro-magnetic motor converter power tube and winding open-circuit fault diagnosis method, and relates to the field of doubly salient electro-magnetic motors. And the neutral point voltage of the armature winding of the electro-magnetic doubly salient motor is compared with half of the bus voltage, open-circuit fault diagnosis is carried out on the power tube and the armature winding in the current operation state, the implementation method is simple and accurate, the fault diagnosis speed is high, the diagnosis cost is low, and the fault diagnosis accuracy is high. And the stability of the whole driving system is improved.

Description

technical field [0001] The invention relates to the field of electric excitation double salient pole motors, in particular to a power tube and winding open circuit fault diagnosis method for electric excitation double salient pole motor converters. Background technique [0002] Electrically excited doubly salient pole is a reluctance motor with doubly salient pole structure and concentrated stator excitation. It has the advantages of simple structure, flexible control, and good fault tolerance. It has broad application prospects in aviation, wind power and other fields. However, the electrical faults in the motor drive system seriously threaten the safe operation of the system. Among the electrical faults, the open-circuit faults of the power tube and the armature winding are two open-circuit faults with a high occurrence rate. The current on the two-phase winding in the state is zero and stops working, which will reduce the torque output of the system and increase the torqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/54G01R31/72
CPCG01R31/54G01R31/72
Inventor 房文静周波王开淼张义军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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