Cross-Interlocked DC Brushless Machine Auxiliary Excitation
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Solution Overview
Problem
Conventional switched DC brushless electric machines require individual electromechanical control units due to their reliance on Hall elements or open loop excitation methods, leading to inefficiencies and increased complexity.
Innovation Solution
A cross-interlocked multi-set switch type DC brushless electric machine system with auxiliary excitation winding sets, where serial and parallel types of auxiliary excitation winding sets are connected in series and parallel configurations to allow for variable excitation by altering the current of magnetic field winding sets across multiple machines, enabling shared control and reduced unit requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Hall elements or open loop excitation methods are used in conventional switched DC brushless electric machines, then the machines can operate independently with individual control, but the system complexity increases due to requiring separate electromechanical control units for each machine
Solution Approach 1:
The patent merges the control functions of multiple electric machines by connecting auxiliary excitation winding sets of different machines in series or parallel configurations. This allows a single control unit to regulate the excitation current shared across multiple machines, eliminating the need for separate control units for each machine while maintaining coordinated operation.
Solution Approach 2:
The auxiliary excitation winding sets serve multiple functions: they provide excitation current to multiple different electric machines simultaneously, enable cross-regulation between machines, and allow a single control unit to manage the operation of multiple machines. This multi-functionality reduces the overall number of control units required in the system.
2Ease of operation
If individual electromechanical control units are used for each switched DC brushless electric machine, then each machine can be precisely controlled, but the system architecture becomes more complex and requires more control components
Solution Approach 1:
The patent combines multiple control functions into a single control unit that manages the auxiliary excitation winding sets of multiple electric machines. By controlling the excitation current that is shared across machines through series or parallel connections, one control unit achieves coordinated control of multiple machines, simplifying the overall control system architecture.
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 and flexible control of multiple DC brushless electric machines with reduced need for individual control units, enhancing operational characteristics and simplifying the system architecture.
Implementation Method 1
a first auxiliary excitation winding set, wherein the first auxiliary excitation winding set is used for performing auxiliary excitation or differential excitation on the magnetic pole of the first rotary part of electric machine
Implementation Method 2
a first electric conductive annular brush device is served as an interface for transmitting electric power
Data Source
AI summary
The present invention relates to a multi-set switched DC brushless electric machine having its rotary part of electric machine being installed with an auxiliary excitation winding set, for being connected in series with a magnetic field winding set of electric machine of another electric machine through the auxiliary excitation winding set installed on the rotary part of electric machine, such that the excitation can be variable through altering the current of the magnetic field winding set of electric machine of the another electric machine thereby changing the operational characteristic of the electric machine.