Important Factors in Vehicle HVAC Performance

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Important Factors in Vehicle HVAC Performance 2023-03-07

• High starting torque: High inertia systems such as electric compressors require high starting torque to allow the compressor motor to reach its preferred operating speed as quickly as possible, improving the end user experience of the HVAC system.

• High efficiency: Except for the HEV/EV powertrain system, the electric compressor system consumes the highest power in EV/HEV, around 5kW. Therefore, power savings through increased efficiency for extended range is a concern for both HEV/EV developers and consumers.

• Low audible noise and low EMI: In ICE cars, the noise of the HVAC system is negligible compared to the noise of the engine. But EVs and HEVs are susceptible to audible noise, especially in silent cars without an engine. Hybrid and electric vehicles are also susceptible to EMI from the BLDC motor and electronics required for the electric compressor. Electric compressor components in HEVs and EVs should not introduce noise that would interfere with existing systems or the consumer's driving experience.

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