Steering power system of electric vehicle and control method for steering power system
A technology of electric vehicles and power systems, applied in the control of motor speed or torque, electric steering mechanisms, electric vehicles, etc., can solve the hidden dangers of vehicle driving safety, the difficulty of turning the steering wheel for users, and the inability of the power steering system to work. Achieve the effect of avoiding difficult rotation and improving driving safety
Active Publication Date: 2016-05-18
BYD CO LTD
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Problems solved by technology
However, when the high-voltage system suddenly loses power, it will cause the power steering system to fail to work, making it difficult for the user to turn the steering wheel, which will bring certain safety hazards to the driving of the vehicle.
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[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0030] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...
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The invention discloses a steering power system of an electric vehicle. The steering power system comprises a steering motor, a steering motor controller, a high-voltage power battery, a low-voltage storage battery, a voltage decrease DC-DC converter and a voltage increase DC-DC converter. The steering motor controller is connected with the steering motor to control the steering motor; the high-voltage power battery is used for outputting high-voltage electricity; the voltage decrease DC-DC converter is used for converting the high-voltage electricity output by the high-voltage power battery into low-voltage electricity to supply the low-voltage electricity to the low-voltage storage battery after a high-voltage system of the electric vehicle starts to work; the voltage increase DC-DC converter is used for converting the low-voltage electricity output by the low-voltage storage battery into the high-voltage electricity; and when an abnormal condition occurs to the high-voltage system of the electric vehicle and power is off, the low-voltage storage battery supplies electricity to the steering motor controller through the voltage increase DC-DC converter. By the adoption of the steering power system, short-time electricity supply of the low-voltage storage battery is used for improving the driving safety of the electric vehicle, and the requirements of a user are fully met. The invention further discloses a control method for the steering power system of the electric vehicle.
Description
technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a steering power system of an electric vehicle and a control method for the steering power system of an electric vehicle. Background technique [0002] At present, the power steering system of electric vehicles is mostly powered by the high voltage system on the electric vehicle, which is beneficial to improve the performance of the power steering system. However, when the high-voltage system suddenly loses power, it will cause the power steering system to fail to work, making it difficult for the user to turn the steering wheel, which will bring certain safety hazards to the driving of the vehicle. Contents of the invention [0003] The object of the present invention is to solve at least one of the above-mentioned technical drawbacks. [0004] For this reason, an object of the present invention is to propose a steering power system of an electric vehicle. When the ...
Claims
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IPC IPC(8): B62D5/04
CPCB60R16/03B60L1/003B60L2210/12B60L2210/14B60Y2200/91B62D5/046B62D5/0481Y02T10/72Y02T10/70Y02T10/7072Y02T90/14B60L53/20B60L15/2036B60L2210/10B60L2240/527B60L1/00B60Y2400/112H02P4/00
Inventor 徐金泽伍星驰罗文刚张超王洪军栾振派
Owner BYD CO LTD