Electric motor coach dual-power driving system and torque distribution method

Abstract

The invention discloses an electric motor coach dual-power driving system and a torque distribution method, and relates to the technical field of pure electric motor coaches. The electric motor coachdual-power driving system comprises a first power battery, a first high-voltage power distribution cabinet, a first motor controller and a first motor which are connected in sequence, and further comprises a second power battery, a second high-voltage power distribution cabinet, a second motor controller and a second motor which are connected in sequence; the first motor and the second motor rotate coaxially and transmit driving force to a front axle or a rear axle through a transmission shaft. According to the invention, two sets of driving systems which operate independently are configured,the two motors in the driving systems rotate coaxially, and the torques are superposed to jointly drive the front axle or the rear axle, so that the phenomenon of single-motor overheating caused by continuous large-torque output can be avoided, the output balance of the two batteries can be ensured, the condition of single-battery overload is avoided, therefore, the service lives of the motor andthe batteries are effectively prolonged, and the stability and reliability of the driving system are improved.

Description

technical field [0001] The invention relates to the technical field of pure electric passenger cars, in particular to a dual-power drive system and a torque distribution method for electric passenger cars. Background technique [0002] Centralized drive is a commonly used drive method for traditional pure electric buses. Its power system generally includes batteries, motors, motor controllers and high-voltage power distribution cabinets. The high-voltage power distribution cabinets are connected between the batteries and motor controllers to provide The controller provides a high-voltage power supply to power the vehicle through the electric motor. Existing electric buses generally only have one set of power system. When there is a torque demand, power output can only be performed by a single battery and driven by a single motor. However, when there is a continuous high torque demand, there may be a phenomenon that the motor is overheated or the balance of the battery is af...

AI Technical Summary

Problems solved by technology

However, when there is a continuous high torque demand, there may be a phenomenon that the motor is overheated or the balance of the battery is affected, resulting in a reduction in the allowable output power of the battery, and affecting the climbing performance and power of the vehicle.

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