Dual-Motor EV Power Drive for Independent Compressor Speed Control
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Solution Overview
Problem
Existing power drive systems in electric vehicles struggle to efficiently regulate the rotation speed of air conditioning compressors independently of vehicle travel speed, leading to unnecessary energy consumption or inadequate temperature regulation.
Innovation Solution
A power drive system with dual motors and clutches allows independent control of drive wheels and air conditioning compressors, enabling flexible operation modes to match travel and temperature regulation requirements, reducing energy consumption by disconnecting or engaging transmission paths as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the air conditioning compressor is driven simultaneously with the drive wheels by a single motor, then the system structure is simple, but the rotation speed of the compressor cannot be regulated according to temperature regulation requirements, leading to unnecessary energy consumption or inadequate cooling/heating
Solution Approach 1:
The transmission system is segmented into multiple independent transmission paths: a first transmission path connecting the first motor to the drive wheels, and a second transmission path connecting the first motor to the air conditioning compressor. A first clutch is disposed on the first transmission path to control connection or disconnection. This segmentation allows independent control of the compressor's rotation speed according to temperature regulation requirements while maintaining simple system structure.
Solution Approach 2:
The first motor is designed with multi-functionality, capable of driving both the drive wheels through the first transmission path and the air conditioning compressor through the second transmission path. This universal motor design allows the system to maintain simplicity while achieving adaptable temperature regulation by selectively engaging different transmission paths based on operational requirements.
2Reliability
If the air conditioning compressor is driven at high speed to meet high temperature regulation requirements, then cooling/heating performance is improved, but energy consumption increases unnecessarily when low temperature regulation is sufficient
Solution Approach 1:
The system employs dynamic control of the first clutch to selectively engage or disengage the first transmission path based on operational conditions. When high temperature regulation is required, the clutch engages to allow the first motor to drive the compressor at high speed through the first transmission path. When low temperature regulation suffices, the clutch disengages to stop the compressor or run it at low speed via the second transmission path, reducing energy consumption while maintaining reliable temperature regulation.
Solution Approach 2:
The system changes the operational parameters of the air conditioning compressor dynamically by switching between two transmission paths. The first transmission path enables high-speed operation for high temperature regulation requirements, while the second transmission path enables low-speed operation for low temperature regulation requirements. This parameter change approach optimizes energy consumption while ensuring reliable temperature control.
3Device complexity
If the first motor drives both the drive wheels and the air conditioning compressor simultaneously, then the system structure is simple, but the first motor operates at high power consumption even when only the drive wheels require power
Solution Approach 1:
The power transmission system is segmented into distinct transmission paths with independent clutch control. The first clutch controls the transmission path from the first motor to the drive wheels, while the second clutch controls the transmission path from the first motor to the air conditioning compressor. This segmentation allows the first motor to operate independently for each function, reducing energy consumption by activating only the required transmission path rather than running the motor at high power for both functions simultaneously.
Data Source
AI summary
Disclosed are a power drive system and a vehicle. The power drive system may include a first motor, a second motor, a first clutch, a transmission device, and an air conditioning compressor; the first motor may be in transmission connection to the air conditioning compressor via a first transmission path, and may be in transmission connection to the transmission device via a second transmission path; the second motor may be in transmission connection to the air conditioning compressor; and the first clutch may be disposed on the first transmission path for connection or disconnection of the first transmission path.