Motor Drive Board Layout With Integrated Connector Assembly
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Solution Overview
Problem
Existing drive devices used in electric power steering systems face challenges in reducing size due to enlarged connection mechanisms between connectors, power boards, and control boards.
Innovation Solution
A drive device configuration where the power board, control board, and connector assembly are arranged in series in the axial direction, with direct connections between the connector assembly and the boards, reducing the number of inter-board connections and allowing for a more compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connector, power board, and control board are connected through multiple inter-board connections, then the electrical connection between components is established, but the connection mechanism becomes enlarged and the drive device size increases
Solution Approach 1:
The patent merges the connector assembly with either the power board or control board to form an integrated unit. This consolidation eliminates the need for separate inter-board connection mechanisms, thereby reducing the overall drive device size while maintaining all necessary electrical connections between the connector, power board, and control board
2Reliability
If a traditional connector configuration with separate power board and control board is used, then the electrical connection is established, but the connection mechanism becomes complex and the drive device size increases
Solution Approach 1:
The patent combines the connector assembly with one of the boards (power board or control board) into a single integrated structure. This merging simplifies the connection mechanism by eliminating separate connection components and reducing the number of inter-board connections required, thereby reducing device complexity while maintaining reliable electrical connections
Data Source
AI summary
A drive device, which is a drive device driving a motor having a rotating shaft, includes a power board on which an inverter circuit driving the motor is mounted, a control board on which a control circuit controlling driving of the motor is mounted and disposed to face the power board in an axial direction of the rotating shaft, an inter-board connector electrically connecting the inverter circuit and the control circuit, and a connector assembly, in which the power board, the control board, and the connector assembly are arranged in this order in the axial direction, and the connector assembly includes a first connector terminal connected to the control board to transmit a signal to the control circuit, and a second connector terminal connected to the power board to supply power to the inverter circuit.