Comprehensive cooling control method for new energy vehicle driving motor

Abstract

The invention relates to a comprehensive cooling control method of a new energy vehicle driving motor. The control method comprises the following steps: firstly, introducing two parameters, namely anenvironment temperature Tamb and a vehicle speed Vhost, which have great influence on cooling of a driving motor M into control of a water cooling system; in combination with a specific algorithm, obtaining a target heat dissipating capacity Qaim needing auxiliary heat dissipation of a water cooling system, and further obtaining a target water inlet temperature Taim for cooling the driving motor M; calculating the rotating speed requirements of the water pump P and the fan F based on the temperature, and fusing the operation control logic to obtain the control duty ratios of the water pump P and the fan F; and finally, outputting pulse width modulation control PWM signals through a controller hard wire, and achieving starting, stopping and rotating speed control over the water pump P and the fan F. According to the control method, the two parameters of the environment temperature Tamb and the vehicle speed Vhost are introduced into control over the water cooling system, the heat dissipation requirement of the driving motor M is considered and calculated more comprehensively and meticulously, work of the water pump P and work of the fan F can be controlled more accurately based on the requirement, and energy consumption for heat dissipation is effectively reduced.

Description

technical field [0001] The invention relates to the field of thermal management of new energy vehicles, in particular to a cooling control technology for driving motors of new energy vehicles. Background technique [0002] The driving motor is an important power component of the new energy vehicle. The cooling control of the driving motor can directly affect the key indicators such as the output power, service efficiency, and service life of the driving motor. This is further reflected in pure electric cruising range, comprehensive fuel consumption of hybrid models, and user driving experience. [0003] At present, most of the cooling of the driving motor in the automotive industry is adopted figure 1 The scheme of the drive motor water cooling system shown, or a derivative scheme based on this scheme. The water-cooling system is composed of a water pump P, a water temperature sensor S, a water supply pot K, a heat dissipation assembly composed of a radiator and a fan F, a...

AI Technical Summary

Problems solved by technology

The main reason is that the influence of the ambient temperature and the real-time heat generation of the driving motor on the cooling of the driving motor is not considered

Images