Motor angle detection and diagnosis device, motor controller, electric vehicle and method

Abstract

The invention relates to a motor angle detection and diagnosis device and method in a vehicle-mounted motor controller. The motor angle detection and diagnosis device is connected with a driving motor through a rotary transformer, and the rotary transformer is used for outputting a rotary transformer feedback signal of the electric angle of the driving motor. An angle sampling and diagnosis system in the motor angle detection and diagnosis device carries out two-path simultaneous sampling on the rotary transformer feedback signals conditioned by the rotary transformer feedback processing circuit, calculates a first electrical angle and a second electrical angle respectively, and carries out real-time diagnosis on the two paths of sampling data, the first electrical angle and the second electrical angle. Meanwhile, a hardware circuit is diagnosed, and the motor controller is controlled to enter a safe state when a diagnosis result is abnormal. According to the scheme, sampling is carried out through two sampling channels, angle software decoding is achieved through a software algorithm, and a software diagnosis mechanism is added, so that angle decoding above ASILC can be achieved, use of a safety decoding chip is avoided, and the production cost is reduced.

Description

technical field [0001] The present application relates to the technical field of vehicle-mounted motor control, and in particular to a motor angle detection and diagnosis device, a motor controller, an electric vehicle, and a motor angle detection and diagnosis method. Background technique [0002] ISO 26262 "Functional Safety of Road Vehicles" is a functional safety standard for road vehicles. It is derived from the basic standard for functional safety of electronics, electrical and programmable devices IEC61508. It is mainly targeted at specific electrical devices, electronic equipment, and programmable electronics in the automotive industry Devices and other components specially used in the automotive field, aiming to improve the international standards for the functional safety of automotive electronics and electrical products. According to the degree of safety risk, the standard determines and divides the safety requirements of the system or a certain part of the system...

AI Technical Summary

Problems solved by technology

However, although this solution can achieve angle sampling above the ASILC level, the price of the security decoding chip with the ASILC level or above is relatively high, which in turn leads to an increase in the material cost of the motor controller

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