Rotating shaft and motor rotor unit

Abstract

The invention discloses a rotating shaft for a motor rotor unit. The rotating shaft is divided into a left side part and a right side part by a shaft shoulder; a first stepped structure is formed on the left side of the rotating shaft, adjacent to the shaft shoulder and used for fixing the first motor rotor assembly; a second stepped structure is formed on the left side of the rotating shaft, adjacent to the first stepped structure and used for connecting a bearing; a third step structure is formed on the right side of the rotating shaft, adjacent to the shaft shoulder and used for fixing themagnetism isolating part; a fourth step structure is formed on the right side of the rotating shaft, is adjacent to the third step structure and is used for fixing the second motor rotor assembly; anda fifth step structure is formed on the right side of the rotating shaft, adjacent to the fourth step structure and used for connecting a bearing. The invention further discloses a motor rotor unit used for the EPS steering system redundant motor and provided with the rotating shaft. Double movement of the motor rotor in the space electrical angle can be achieved, torque fluctuation can be eliminated, the influence caused by shaking of a steering wheel of the steering system is avoided, and the safety of the EPS steering system is improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a rotating shaft used for a motor rotor unit of an EPS steering system. The invention also relates to a rotor unit of an electrical machine with the shaft. Background technique [0002] The EPS steering system is one of the most important assemblies related to the personal safety of drivers and passengers on the vehicle. Redundant safety design must be considered to ensure that at least basic and controllable steering capabilities can be provided under any circumstances. At present, the electric power steering system EPS is composed of an electronic control part and a mechanical structure. In the case of failure of the electronic control part of the traditional EPS system, the driver can only drive the steering through the mechanical structure such as the pipe column, which is undoubtedly a difficult problem for the driver, and it is difficult to achieve the goal of safe steering and ...

AI Technical Summary

Problems solved by technology

At present, the six-phase motor researched in many journal papers is essentially a double shift of the electrical angle on a set of windings, which cannot realize the real double shift of the electromagnetic field of the motor space

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