Motor driving device and electric automobile

Abstract

The invention discloses a motor driving device and an electric automobile, wherein the device comprises a power supply unit which comprises a high-voltage storage battery module, a DC-DC module and a low-voltage storage battery module; the high-voltage storage battery module is input to the low-voltage storage battery module after passing through the DC-DC module; the high-voltage storage battery module can supply power to the high-voltage part of the motor controller; the low-voltage storage battery module can supply power to the low-voltage part of the motor controller; the low-voltage storage battery module comprises a low-voltage storage battery, a power supply activation circuit and an auxiliary power supply circuit; the low-voltage storage battery can supply power to the motor controller; and the low-voltage storage battery can supply power to the motor controller after passing through the power supply activation circuit and the auxiliary power supply circuit. According to the scheme, the flyback switching power supply with the power supply activation circuit is arranged, so that a logic error is prevented from occurring during the power starting period of the power supply, and the safety of the flyback switching power supply is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a motor drive device and an electric vehicle, in particular to a high-reliability electric vehicle controller drive circuit and an electric vehicle with the drive circuit. Background technique [0002] Among the related schemes, the power supply scheme of the new energy vehicle motor drive controller mostly uses the power chip to drive the MOS tube to build the flyback switching power supply topology; and the power control IC (that is, the power chip) is input to the voltage lockout (UVLO) The voltage of the circuit is compared with the reference voltage of the comparator inside the chip to realize the control of the voltage and current of the primary and secondary coils of the transformer, so as to prevent the wrong logic state during the power startup of the power supply. However, when the transformer in the flyback switching power supply does not reach the working voltage, but ...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a motor drive device and an electric vehicle to solve the problem of using a switching power supply chip with a UVLO circuit in a flyback switching power supply. When the working voltage is not reached, but the control logic of the power supply chip reaches the working voltage, it will cause the drive circuit to malfunction and pose a safety hazard. By setting a flyback switching power supply with a power activation circuit, it is possible to avoid occurrences during the power start-up period of the power supply. Logical errors are beneficial to ensure the safety of the flyback switching power supply

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