A speed limiting method for a drive controller of a pure electric new energy vehicle

Abstract

The invention provides a speed limiting method of a pure electric new energy vehicle driving controller. The speed limiting method of the pure electric new energy vehicle driving controller comprisesthe steps of S1, setting a busbar voltage limiting value Umax and a motor highest rotation speed Vmax; S2, obtaining a current motor rotation speed V and a current busbar voltage Udc by using a motordriver; S3, judging whether the current busbar voltage Udc is higher than the busbar voltage limiting value Umax or not; and if the current busbar voltage Udc is higher than the busbar voltage limiting value Umax, closing a main relay and closing a power module of a motor driving controller; and S4, judging whether the current motor rotation speed V is higher than the set motor highest rotation speed Vmax or not, and if the current motor rotation speed V is higher than the set motor highest rotation speed Vmax, enabling a speed limiting protection regulator to limit the speed. According to thespeed limiting method of the pure electric new energy vehicle driving controller, without additionally arranging a device or a system between the motor driving controller and a driving motor, the speed limiting protection of the pure electric vehicle can be realized by using a software to increase a speed limiting function on the level of the motor driving controller

Description

technical field [0001] The invention relates to a speed limiting method, in particular to a speed limiting method for a drive controller of a pure electric new energy vehicle. Background technique [0002] As a big energy consuming country in the world and an important force in environmental protection, my country is actively deploying electric vehicle technology strategy. Pure electric new energy vehicles (hereinafter referred to as pure electric vehicles) have become an important part of the development and production of automobile manufacturers in my country and even in the world. part. [0003] Compared with traditional fuel vehicles, for pure electric vehicles, the motor drive controller controls the operation of the driving power motor according to the driving strategy and driving safety strategy, so as to realize the driving under the driving conditions of the vehicle. The control driving method of most pure electric vehicles is speed The direct torque control of the ...

AI Technical Summary

Problems solved by technology

These methods all use additional devices or systems, which not only increase the hardware cost, but also the protection operation of some methods is limited to the electrical on-off operation between the motor and its controller. When the motor is running at high speed, the instantaneous on-off may cause Phenomena such as large current overcurrent, and instantaneous on-off between the motor and the controller will also affect the driver's driving experience

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