Motor Power Supply Circuit for Switchable Winding Modes
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Solution Overview
Problem
Existing rotary electric machine systems face complexity in configuration due to a large number of lead wires and switching elements, which complicates the imparting of different characteristics to the motor, especially in achieving optimal torque and output across various speed ranges.
Innovation Solution
A power supply circuit with a first and second circuit, each comprising arms with switching elements and flyback diodes, connected to windings of a rotary electric machine, allowing for different winding configurations to be powered, reducing the number of lead wires and switching elements while enabling three or six switchable modes to optimize torque and output across rotation speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple windings are energized to provide different motor characteristics, then torque and output optimization is improved, but the number of lead wires and switching elements increases
Solution Approach 1:
The patent divides each phase winding into multiple independent winding portions (first winding portion and second winding portion per phase). By segmenting the windings and providing selective switching capability through the power supply circuit, the system can energize different combinations of winding portions to achieve various motor characteristics without requiring separate complete winding sets, thus reducing overall complexity while maintaining versatility.
Solution Approach 2:
The patent implements dynamic switching capability through the power supply circuit that can selectively energize different winding portions based on operating conditions. The switching elements and control unit enable the system to dynamically reconfigure which winding portions are active, allowing adaptation between high-speed and low-speed modes, and optimizing torque and output characteristics in real-time without physical reconfiguration.
2Productivity
If winding configurations are changed to optimize torque and output, then motor performance is improved, but the number of switching elements increases
Solution Approach 1:
The patent combines the switching functions for multiple winding portions into a unified power supply circuit structure. By merging the control of first and second winding portions within the same phase into a single power supply circuit with coordinated switching elements, the system achieves efficient torque and output optimization while reducing the total number of switching elements compared to having separate independent control circuits for each winding portion.
Solution Approach 2:
The power supply circuit is designed with multi-functionality to handle multiple winding portions across different phases. The switching elements and control unit can universally manage various winding combinations to achieve different motor characteristics (high-speed mode, low-speed mode, torque optimization, output optimization), reducing the need for dedicated switching elements for each specific function.
Data Source
AI summary
A power supply circuit configured to supply electric power to a rotary electric machine that includes: a first phase winding including a first winding portion and a second winding portion; and a second phase winding including a third winding portion and a fourth winding portion, the power supply circuit including: a first circuit connected to the first phase winding; and a second circuit connected to the second phase winding. The first circuit includes: first to third arms, and a first switch. The second circuit includes: fourth to sixth arms; and a second switch.