New energy automobile electric power-assisted steering system

Abstract

The invention discloses a new energy automobile electric power-assisted steering system. The new energy automobile electric power-assisted steering system comprises a steering oil pump and a steering motor, the steering motor is provided with a high voltage winding and a low voltage winding, the high voltage winding is electrically connected with a high voltage power source, the low voltage winding is electrically connected with a low voltage power source, the high voltage winding is driven by a high voltage controller, the low voltage winding is driven by a lower voltage controller, communication is achieved between the high voltage controller and the lower voltage controller, and among the high voltage controller, the low voltage controller and a whole-vehicle controller through CAN, and when a whole vehicle works normally and the high voltage controller drives the high voltage winding to output power, the low voltage winding does not output the power or a low voltage driver drives the low voltage winding to output part of the power; when a fault which causes that the high voltage winding cannot work occurs in any one of the high voltage power source, a high voltage driver and the high voltage winding, a low voltage driver drives the low energy winding to output the power with full power. The new energy automobile electric power-assisted steering system solves the problem that the steering system has no assisted power after the high voltage control system of the new energy passenger car is invalid.

Description

technical field [0001] The invention relates to automobile engineering technology, in particular to an electric power steering system for a new energy vehicle. Background technique [0002] The current electro-hydraulic power steering system of new energy vehicles is mainly driven by a high-voltage drive motor to drive the steering oil pump. The drive motor is driven by the high-voltage control system of the vehicle. At present, the electro-hydraulic power steering system of new energy vehicles has the following disadvantages: [0003] (1) When the vehicle actively cuts off the power, that is, when the high-voltage battery has no voltage, the power supply of the high-voltage controller is cut off immediately, and the corresponding steering motor will stop running at this time, and the steering will have no power steering. prone to accidents; [0004] (2) When the whole vehicle is running, if any one of the steering motor and the steering controller fails and is damaged, it...

AI Technical Summary

Problems solved by technology

[0003] (1) When the vehicle actively cuts off the power, that is, when the high-voltage battery has no voltage, the power supply of the high-voltage controller is cut off immediately, and the corresponding steering motor will stop running at this time, and the steering will have no power steering. prone to accidents;

[0004] (2) When the whole vehicle is running, if any one of the steering motor and the steering controller fails and is damaged, it will have a fatal effect on the steering, and it is very easy to cause the thugs to cause loss of control when turning;

[0005] (3) The steering system of the whole vehicle has no emergency backup steering, and the safety is low