Multi-phase Motor Switching Device Series-Parallel Coil Configuration
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Solution Overview
Problem
Existing multi-phase motor technologies lack the ability to dynamically switch between series and parallel connections for coil parts, limiting flexibility and efficiency in torque generation and high-speed driving.
Innovation Solution
A multi-phase motor switching device with switching units that can switch coil parts between series and parallel connections, utilizing semiconductor and mechanical relays, and a control unit to manage these connections, allowing for dynamic configuration of coil wire parts for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If coil parts are connected in series, then inductance increases and torque generation is enhanced, but the motor is unsuitable for high-speed driving
Solution Approach 1:
The patent applies dynamics by making the coil connection configuration changeable during operation. The switching unit dynamically reconfigures coil parts between series and parallel connections based on operating conditions, allowing the motor to adapt to different speed and torque requirements. This resolves the contradiction by enabling the system to have high inductance (series) for torque generation and low inductance (parallel) for high-speed operation.
2Speed
If coil parts are connected in parallel, then the motor is suitable for high-speed driving, but inductance decreases and torque generation is reduced
Solution Approach 1:
The switching unit enables dynamic reconfiguration of coil connections, allowing the motor to switch between parallel connection (for high-speed operation) and series connection (for torque generation). This dynamic adaptability resolves the contradiction by permitting the system to optimize for speed when needed while maintaining the capability for high torque when required.
3Adaptability or versatility
If a switching unit is added to enable series-parallel switching, then operational flexibility is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the coil into multiple independent coil parts that can be independently connected. The switching unit segments the control of each coil part, allowing independent connection configuration. This segmentation enables operational flexibility while managing complexity through modular, independent switching elements rather than a monolithic complex system.
Data Source
AI summary
Provided is a multi-phase motor switching device capable of switching a plurality of coil parts constituting the phase coils of a multi-phase motor between a series connection and a parallel connection. A multi-phase motor switching device is used in a multi-phase motor provided with a first-phase coil, a second-phase coil, and a third-phase coil. The multi-phase motor switching device includes: a first switching unit configured to switch a plurality of first coil parts constituting the first-phase coil between a series connection and a parallel connection; a second switching unit configured to switch a plurality of second coil parts constituting the second-phase coil between a series connection and a parallel connection; a third switching unit configured to switch a plurality of third coil parts constituting the third-phase coil between a series connection and a parallel connection.