High-reliability permanent-magnet fault-tolerant steering motor

Abstract

The invention discloses a high-reliability permanent-magnet fault-tolerant steering motor, and belongs to the technical field of fault-tolerant motors, the motor adopts a 20-pole 24-slot matched structure, a winding mode adopts a tooth-separated winding mode of fractional-slot single-layer concentrated windings, armature teeth are provided with high-voltage windings and low-voltage windings in a crossing manner, fault-tolerant teeth are not provided with windings, and a magnetic loop is provided; a stator adopts a large and small tooth distribution mode, and stator teeth are in a parallel tooth type; a rotor adopts a semi-embedded SPM topological structure, the rotor comprises permanent magnets and a rotor iron core, the permanent magnets are of surface-mounted structures, the rotor iron core is of a dovetail groove type design, circular holes are uniformly formed in a rotor punching sheet at intervals, and the number of the circular holes is the same as that of the permanent magnets. The problem that the switching time of switching the high-voltage winding to the low-voltage winding is too long due to the fact that the high-voltage winding and the low-voltage winding cannot operate at the same time in a traditional double-winding motor applied to a double-source steering system is solved, the inter-phase mutual inductance and the high-voltage winding and low-voltage winding mutual inductance of the motor are almost zero, the fault-tolerant capability of the motor is improved, and the inter-phase short-circuit fault probability is reduced.

Description

technical field [0001] The invention relates to the technical field of fault-tolerant motors, in particular to a highly reliable permanent magnet fault-tolerant steering motor. Background technique [0002] The dual-source steering system is currently applied in the field of electric vehicles. The steering motor is the key executive part of the steering system. In the dual-source steering system, the steering motor is selected as a high-voltage and low-voltage dual-source steering motor. This motor is a double-winding permanent magnet fault-tolerant motor. There are independent high-voltage windings and low-voltage windings to ensure that the 24V low voltage is automatically connected when a high-voltage fault occurs during the driving of the vehicle, and the vehicle can maintain the power steering capability and realize the safe parking of the vehicle. [0003] At present, in the traditional double-winding motor technology, the motor adopts double-layer winding distribution...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-reliability permanent magnet fault-tolerant steering motor for the defects of the background technology, so as to solve the problem that the double-winding motors traditionally used in dual-source steering systems cannot realize the simultaneous operation of high and low voltage windings, resulting in switching of high voltage windings to The low-voltage winding switching time is too long, and the mutual inductance between the motor phases and the high-voltage and low-voltage windings can be almost zero, which improves the fault tolerance of the motor and reduces the probability of short-circuit faults between phases

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