Motor driving system, method, motor driver and electromobile

Abstract

The present invention provides a motor driving system, a method, a motor driver and an electromobile. The motor driving system comprises a high voltage backup power supply, a motor controller, a driving circuit, a first voltage detection unit, a low voltage power supply and a driving power supply supplied by the low voltage power supply. The driving circuit comprises a first driving unit and a second driving unit; the first driving unit is used to output the driving voltage to an upper arm switching tube of an inventer; and the second driving unit is used to output the driving voltage to a lower upper arm switching tube of the inventer. The driving power supply generates two-way driving voltage which is respectively output through a first voltage output port and a second voltage output port. The first voltage output port is connected with the first driving unit. The second voltage output port and a first output port of the high voltage backup power supply are connected with the second driving unit via a first selection unit; and the first selection unit switches the second driving unit to the first output port of the high voltage backup power supply for power supply when the second voltage output port is abnormal.

Description

technical field [0001] Embodiments of the present invention relate to the field of electric vehicle control, and more specifically, relate to a motor drive system, method, motor driver and electric vehicle. Background technique [0002] With the development of electric vehicle technology, electric vehicles are accepted by more and more people, and correspondingly, the safety requirements for electric vehicles are also getting higher and higher. Such as figure 1 As shown, in the existing electric vehicle, the high-voltage terminal 10 provides electric energy for the operation of the motor. Specifically, the high-power DC conversion circuit 11 converts the high-voltage direct current provided by the high-voltage terminal 10 into a low-voltage direct current and charges the low-voltage battery 12. The motor controls Device 15, lower bridge arm drive power supply 13, and upper bridge arm drive power supply 14 are powered by low-voltage battery 12, and motor controller 15 genera...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the embodiments of the present invention is to provide a motor drive system, a motor drive and an electric vehicle in view of the problems in the technical solution of the drive power supply of the above-mentioned motor drive, such as a large number of power supplies, high cost, and large volume.

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