Drive Protection and Diagnosis of the Air Conditioner Actuator Module of the Bus

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Drive Protection and Diagnosis of the Air Conditioner Actuator Module of the Bus 2020-07-14

With the popularity of coaches, the requirements for comfort and energy-saving and environmental protection of coaches are getting higher and higher, and the performance of the air-conditioning of coaches is also getting more and more attention. Compared with traditional manual air conditioning, the new automatic air conditioning system can significantly improve fuel economy and reduce carbon emissions. The core of automatic air conditioning control is the air conditioning controller, and its control strategy and control accuracy are related to the performance of the automatic air conditioning. The industry provides a series of air motor drive chips used in bus automatic air conditioning, which can achieve perfect fault diagnosis and protection, and effectively improve the overall performance and reliability of the automatic air conditioning system of the bus automatic air conditioning system. This paper analyzes the control principle, various fault states and protection requirements of automobile air conditioning damper motor, and puts forward the control logic of automobile damper motor fault diagnosis and protection, and finally gives the verification results of the actual system.

In the entire bus automatic air conditioning system, the damper actuator is one of the most core controller core control devices. It is mainly used to control the system operation mode, adjust the system temperature, and set the internal and external air circulation. Generally, the single-zone automatic air conditioner has three damper actuators to control the functions mentioned above. There are more than four damper actuators in the dual temperature zone to better adjust the temperature of the rear passengers, and some complex automotive automatic air conditioning systems may have more than ten damper actuators to achieve more complex functions.

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