Integrated Motor Coil and Bridge Arm Circuit for EV Charging
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Solution Overview
Problem
Current electric vehicle systems have complex circuit structures, low integration levels, large volumes, and high costs due to independent motor drive and battery charging circuits.
Innovation Solution
An energy conversion device integrating a motor coil, bridge arm converter, and bidirectional bridge arm, which forms both DC and AC charging circuits and a motor drive circuit, allowing for shared components and simplified system design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If motor drive circuit and battery charging circuit are designed as independent circuits, then normal motor driving and battery charging can be ensured, but the circuit structure becomes complex, integration level decreases, volume increases, and cost increases
Solution Approach 1:
The patent combines the motor drive circuit and battery charging circuit into a single integrated circuit. The motor coil serves dual purposes: as the motor winding for motor drive and as the charging inductor for battery charging. The bridge arm converter handles both motor control and charging functions, eliminating the need for separate independent circuits while maintaining reliable operation of both functions.
Solution Approach 2:
The motor coil is designed to perform multiple functions: it acts as the motor winding when the vehicle is driving and as the charging inductor when the vehicle is charging. The bridge arm converter is configured to handle both motor drive operations and battery charging operations, making the circuit universal and multi-functional rather than dedicated to a single purpose.
2Reliability
If motor drive circuit and battery charging circuit are designed as independent circuits, then normal motor driving and battery charging can be ensured, but the integration level becomes low
Solution Approach 1:
The patent merges the previously separate motor drive and battery charging circuits into one integrated system. The same motor coil and bridge arm converter are used for both functions, achieving high integration level while ensuring reliable operation through proper circuit configuration and control.
3Reliability
If motor drive circuit and battery charging circuit are designed as independent circuits, then normal motor driving and battery charging can be ensured, but the volume becomes large
Solution Approach 1:
By combining the motor drive and battery charging circuits into a single integrated circuit using shared components (motor coil as dual-purpose element, bridge arm converter for both functions), the overall system volume is significantly reduced compared to having separate independent circuits for each function.
4Reliability
If motor drive circuit and battery charging circuit are designed as independent circuits, then normal motor driving and battery charging can be ensured, but the cost becomes high
Solution Approach 1:
The integrated circuit design reduces manufacturing costs by eliminating redundant components. Instead of requiring separate motors, separate chargers, and separate control circuits, the system uses a single motor coil and bridge arm converter that performs both motor drive and battery charging functions, thereby reducing component count, assembly complexity, and overall manufacturing cost.
Data Source
AI summary
An energy conversion device is provided, including a motor coil (11), a bridge arm converter (12), and a bidirectional bridge arm (13). The bridge arm converter (12) is connected to the motor coil (11) and the bidirectional bridge arm (13). The motor coil (11), the bridge arm converter (12), and the bidirectional bridge arm (13) are all connected to an external charging port (10). Both the bridge arm converter (12) and the bidirectional bridge arm (13) are connected to an external battery 200. The motor coil (11), the bridge arm converter (12), and the external charging port (10) form a DC charging circuit for charging the external battery 200. The motor coil (11), the bridge arm converter (12), the bidirectional bridge arm (13), and the external charging port (10) form an AC charging circuit for charging the external battery (200). The motor coil (11), the bridge arm converter (12), and the external battery (200) form a motor drive circuit.