Integrated Inverter Control Device for Electric Vehicle Thermal Management
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Solution Overview
Problem
The increasing demand for permanent magnet synchronous motors in electric vehicles leads to a higher number of VVVF inverters and associated devices, resulting in larger system configurations and increased costs due to individual control requirements.
Innovation Solution
An electric vehicle control device comprising a motor, multiple inverters with semiconductor device packages, and a cooler unit that transforms DC power to AC power, where the semiconductor device packages are connected to share cooling resources, reducing heat generation and space requirements by integrating multiple devices into a single unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple VVVF inverters and gate control devices are equipped to control each permanent magnet synchronous motor individually, then the control precision and motor performance are improved, but the device complexity and system cost increase
Solution Approach 1:
The patent combines multiple gate control devices into a single integrated control device that can control multiple VVVF inverters simultaneously. This merging approach maintains the individual control capability for each permanent magnet synchronous motor while reducing the overall number of control devices, thereby decreasing device complexity and system cost without sacrificing control precision
Solution Approach 2:
The integrated gate control device is designed with multi-functional capability to control multiple VVVF inverters through a single device. This universal control approach allows one control device to perform the functions previously requiring multiple separate control devices, reducing system complexity while maintaining the ability to individually control each motor
2Reliability
If multiple VVVF inverters and associated control devices are equipped for each permanent magnet synchronous motor, then the motor control performance is improved, but the system size and installation space increase
Solution Approach 1:
The patent merges multiple gate control devices into a single integrated control device, which directly reduces the system size and installation space required. This consolidation maintains the ability to control multiple permanent magnet synchronous motors individually while occupying less physical space in the vehicle
3Adaptability or versatility
If a conventional system with multiple separate inverters and control devices is used, then each motor can be controlled individually, but the overall system cost increases due to the increase in number of apparatus
Solution Approach 1:
The patent combines multiple gate control devices into a single integrated control device, reducing the total number of components that need to be manufactured, assembled, and installed. This merging approach maintains the adaptability to control multiple motors individually while significantly reducing system cost by eliminating redundant control devices
Solution Approach 2:
The integrated gate control device is designed with universal control capability that can individually control multiple permanent magnet synchronous motors through a single device. This multi-functional design maintains the versatility needed for individual motor control while reducing the overall system cost by replacing multiple separate control devices with one unified device
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for efficient cooling and reduced part counts, minimizing space and costs while maintaining efficient operation of permanent magnet synchronous motors, thereby addressing the challenge of scaling and cost in electric vehicle control systems.
Implementation Method 1
a cooler unit connected to semiconductor device packages of plurality inverter to cool the semiconductor device packages of plurality inverter
Implementation Method 2
a cooler unit connected to semiconductor device packages of plurality inverter to cool the semiconductor device packages of plurality inverter
Data Source
Figure 1
Figure 2
Figure 3(a)~3(f)
AI summary
According to one embodiment, there is provided an electric vehicle control device having an inverter package (1), whereas the electric vehicle control device can distribute the heat generated by the semiconductor devices (22a-22c) in the DC/AC converter (21a-21c) of the inverter package efficiently. Also disclosed herein are methods of converting DC to AC while keeping the heat value of the semiconductor devices (22a-22c) stable.