Current setting method for fault-tolerant control on one-phase winding open-circuit fault of 45-degree phase belt angle four-phase permanent-magnet synchronous motor

A permanent magnet synchronous motor, current setting technology, applied in the direction of the current controller, etc., can solve the problem of weak torque output capacity of the motor, and achieve the effect of improving the torque output capacity

Active Publication Date: 2016-07-27
黑龙江省工研院资产经营管理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the motor torque output capability is weak when the one-phase winding of a conventional four-phase permanent magnet synchronous motor with a phase belt angle of 45° is faulty, and provides a four-phase permanent magnet synchronous motor with a phase belt angle of 45°. Current setting method for fault-tolerant control of one-phase winding open-circuit fault of magnetic synchronous motor

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  • Current setting method for fault-tolerant control on one-phase winding open-circuit fault of 45-degree phase belt angle four-phase permanent-magnet synchronous motor
  • Current setting method for fault-tolerant control on one-phase winding open-circuit fault of 45-degree phase belt angle four-phase permanent-magnet synchronous motor
  • Current setting method for fault-tolerant control on one-phase winding open-circuit fault of 45-degree phase belt angle four-phase permanent-magnet synchronous motor

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specific Embodiment approach 1

[0036] Specific implementation mode one: the following combination Figure 1 to Figure 7 Describe this embodiment, the current setting method for the fault-tolerant control of one-phase winding open-circuit fault of a four-phase permanent magnet synchronous motor with a 45° phase angle described in this embodiment, this embodiment provides that the current amplitude remains unchanged before and after adjustment Case.

[0037] The schematic diagram of the power supply principle of a four-phase permanent magnet synchronous motor with a phase angle of 45° is shown in figure 1 with figure 2 as shown, figure 2 The disclosed topology is described in detail in the Chinese patent "Four-Phase Six-Bridge Inverter with High Fault Tolerance" with publication number CN103051226A. The schematic diagram of the winding space of a four-phase permanent magnet synchronous motor with a 45° phase belt angle is shown in image 3 shown. The number of turns in series for each phase of the four...

specific Embodiment approach 2

[0083] Specific implementation mode two: this implementation mode will further illustrate implementation mode one, 1' m = I m . And provide a specific embodiment.

[0084] Adopting the current setting method for fault-tolerant control of one-phase winding open-circuit faults of four-phase permanent magnet synchronous motors with 45° phase angles according to the present invention can significantly improve the torque output capability of the motor after a fault, specifically manifested in: Under the premise of not increasing the current excitation amplitude, the torque output by the traditional fault-tolerant control method after a one-phase open-circuit fault is 63.3% of the normal state, while using the method of the present invention, the output torque after a one-phase open-circuit fault is 68.3% of normal conditions.

specific Embodiment approach 3

[0085] Embodiment 3: This embodiment will further explain Embodiment 1. In the case of an open-circuit fault of a phase winding of the motor, the inverter adjusts the phase relationship of the remaining winding currents of each phase according to the method of the present invention, and the amplitude of the current Simultaneous scaling can be performed in a proportional relationship.

[0086] I' m = kI m , where k is the scaling factor, and k is a positive number.

[0087] If the D-phase winding is open, if k=1.2, the A, B, and C three-phase currents are all adjusted to 1.2 times the original.

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Abstract

The invention relates to a current setting method for fault-tolerant control on a one-phase winding open-circuit fault of a 45-degree phase belt angle four-phase permanent-magnet synchronous motor, and belongs to the field of a motor and aims to solve the problem of poor motor torque output capability of the conventional 45-degree phase belt angle four-phase permanent-magnet synchronous motor during the one-phase winding open-circuit fault. According to the scheme, the conventional 45-degree phase belt angle four-phase permanent-magnet synchronous motor adopts a four-phase full-bridge inverter to supply power; when the motor encounters the one-phase winding open-circuit fault and in order that the motor can output maximum smooth torque, the amplitude of a positive rotation component is maximum on the premise that a reverse rotation component in synthesis magnetomotive force is zero, so that a positive round rotation magnetic field with maximum amplitude can generate in an air gap, and the input current of each remaining phase winding is adjusted; and compared with a winding open-circuit fault fault-tolerant control method, the method has the advantages that the torque output capability of the four-phase permanent-magnet synchronous motor under the one-phase winding open-circuit fault can be improved.

Description

technical field [0001] The invention belongs to the field of motors. Background technique [0002] Since the 21st century, with the increasingly serious energy crisis and environmental pollution problems, new energy vehicles represented by electric vehicles have gained more and more attention. For electric vehicles, the safety and reliability of their electric drive systems are of paramount importance. However, when the traditional three-phase permanent magnet synchronous motor has a winding open circuit or a short circuit fault, the output torque of the motor will change drastically, and even fail to work. The four-phase permanent magnet synchronous motor has good fault-tolerant operation ability due to its redundant phase number. Good application potential. [0003] From the structure of the motor body, the four-phase permanent magnet synchronous motor can be divided into a 90° phase angle four-phase permanent magnet synchronous motor and a 45° phase angle four-phase pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/28
Inventor 隋义佟诚德王伟男刘家琦王明峤
Owner 黑龙江省工研院资产经营管理有限公司
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