Self-adaptive control method for cooling electronic fan of pure electric bus driving system

Abstract

The invention discloses a self-adaptive control method for a cooling electronic fan of a pure electric bus driving system. The method specifically comprises the following steps: (1), when a key signalis equal to 1, enabling a cooling system to be in a power-off mode; (2), when the key signal is equal to 2, enabling the cooling system to enter an awakening mode; (3), when the key signal is greaterthan or equal to 3, self-checking an electronic fan, and entering a waiting mode after the self-checking is finished; (4), after entering a waiting mode, not entering a driving mode, enabling a waterpump and a fan not to work, and only when the motor or the motor control temperature is greater than a set threshold value, enabling the water pump to intervene in working in advance and stopping working until the motor and motor controller temperature is lower than the set threshold value; and (5) when detecting that the whole vehicle enters the driving mode, enabling the water pump, enabling the electronic fan to enter the working mode, and enabling the PWM of the electronic fan to be equal to max (PWM1, PWM2). The method is simple in control, low in cost, easy to implement, suitable for cooling the electronic fan of the pure electric bus driving system and capable of effectively avoiding excessive energy consumption of the cooling system.

Description

technical field [0001] The invention relates to the technical field of thermal management of new energy vehicles, and more specifically refers to an adaptive control method for a cooling electronic fan of a driving system of a pure electric bus. Background technique [0002] With the increasingly prominent environmental and energy issues, energy-saving and environmentally friendly pure electric buses are increasingly recognized by people in the field of urban public transportation. The drive motor is the power source of the pure electric bus, and its performance directly affects the safety and quality of the vehicle. When the vehicle starts, accelerates, and drives at high speed, the motor works under high current conditions, the internal friction between the motor controller and the motor will increase sharply, and a large amount of heat will be released. If the heat is not effectively cooled, the internal temperature of the motor controller and the motor will It will rise...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an adaptive control method for the cooling electronic fan of the driving system of a pure electric bus, in order to overcome the existing method of using PWM to control the electronic fan, which cannot effectively avoid the excessive energy consumption of the cooling system in the pure electric bus

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