Fault-tolerant modular permanent magnet auxiliary synchronous reluctance motor

Abstract

The invention discloses a fault-tolerant modular permanent magnet auxiliary synchronous reluctance motor which comprises modular stators and rotors. The modular stators are connected through non-conductive magnets. Grooves on both sides of each non-conductive magnet are skewed at different angles. Stator module units are connected through independent three-phase distributed windings. The rotors comprise rotor cores and asymmetric magnetic barriers. Permanent magnets are embedded in the magnetic barrier structures. N poles and S poles of adjacent permanent magnets are alternately arranged. According to the invention, due to the fact that a PMa-SynRM motor in a traditional winding distributed structure is not fault-tolerant, the modular idea is applied to the design of the motor to realize decoupling between modules and meet the requirement of high reliability of a drive motor system in the field of electric vehicles.

Description

technical field [0001] The present invention relates to the field of motors, more specifically, to a permanent magnet assisted synchronous reluctance motor. Background technique [0002] As a key component of electric vehicles, the motor drive system's performance is directly related to the power performance and conversion efficiency of electric vehicles. At present, the interior permanent magnet synchronous motor (IPMSM) with distributed winding structure is more researched on the driving motor used in electric vehicles. However, rare earth materials such as NdFeB are expensive, which will greatly increase the cost of the motor, and it is easy to cause demagnetization in a high temperature environment, resulting in the failure of the motor drive system to operate normally, which will limit the application of IPMSM motors in the field of electric vehicles to a certain extent. Permanent magnet assisted synchronous reluctance motor (PMa-SynRM) is a special IPMSM motor. The pe...

AI Technical Summary

Problems solved by technology

In traditional three-phase motors, when faults such as winding open circuit and winding short circuit occur, the torque of the motor will drop sharply and be accompanied by severe vibration, so that the motor cannot work normally. the threat of

However, PMa-SynRM with distributed winding can have the same power density as other motors in a smaller size, but it has no fault tolerance

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