A multi-motor control method, system and electric vehicle

Abstract

The invention discloses a multi-motor control method comprising the steps of storing parameter sets of all motors configured in the electric vehicle and a current table corresponding to each parameterset one by one into a storage unit in advance; after a recognition command is received, outputting a preset voltage and a preset current to acquire the parameter set of a current motor configured inthe electric vehicle; judging whether the parameter set that is the same as the parameter set of the current motor exists in the storage unit; and if yes, calling the parameter set which is the same as the parameter set of the current motor and the current table corresponding to the parameter set one by one, to control an output parameter of the current motor. According to the method provided by the invention, the parameter sets of all motor that can be configured in the electric vehicle and the current tables are stored in the storage unit in advance, for the same electric vehicle, only a storage unit is needed, the quantity of material codes is reduced, and the convenience of material management is improved. The invention also discloses a multi-motor control system and the electric vehicle, with the abovementioned beneficial effects.

Description

technical field [0001] The invention relates to the field of motors, in particular to a multi-motor control method, system and electric vehicle. Background technique [0002] At present, electric vehicles generally use permanent magnet synchronous motors as the main power drive motors. When the motor controller adopts vector control algorithm, the output torque equation of permanent magnet synchronous motors is T=3 / 2×p×[ψ×I d -(L d -L q )×I d ×I q ], where p is the number of pole pairs of the motor, ψ is the flux linkage of the permanent magnet, L d is the direct axis inductance, L q is the quadrature axis inductance, I d is the direct axis current, I q is the quadrature current. In order to maximize the output torque characteristics of permanent magnet synchronous motors, the motor controller generally adopts the MTPA (Maximum Torque Per Ampere, maximum torque-to-current ratio) control method to control I d and I q , considering L d and L q vary greatly under di...

AI Technical Summary

Problems solved by technology

When the same electric vehicle is matched with permanent magnet synchronous motors from different suppliers, multiple material codes are required to distinguish the different permanent magnet synchronous motors that the electric vehicle can be equipped with and the motor controller software corresponding to the permanent magnet synchronous motors one by one. Increased workload for material management

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