Shared-Rotor Kinetic Generator for Back-EMF Interference
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Solution Overview
Problem
Conventional electric motors and power generators experience interference effects due to counter electromotive force, which hinder their operational efficiency.
Innovation Solution
The magnetic fields of electric motors and power generators are synchronized by sharing a common rotor and using a DC brushless drive controller to change the phases of the exciting winding, transforming the interference effect into a positive effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electric motors and power generators operate independently with separate magnetic fields, then each device can function autonomously, but counter electromotive force creates interference effects that reduce operational efficiency
Solution Approach 1:
The patent merges the electric motor and power generator into a single integrated unit where both devices share a common rotor and magnetic field system. The stator contains both exciting coil windings (for the motor) and field windings (for the generator), creating a unified magnetic field that eliminates the interference effects caused by separate counter electromotive forces. This combination allows the harmful counter electromotive force to be converted into a positive effect by synchronizing the magnetic fields of both devices.
2Device complexity
If the electric motor and power generator use separate rotors and magnetic fields, then each component can be optimized independently, but the system complexity increases and interference effects occur
Solution Approach 1:
The patent combines multiple components into a unified structure: a single rotor serves both the electric motor and power generator functions, while the stator contains both exciting coil windings and field windings arranged in the same magnetic circuit. This merging reduces device complexity by eliminating redundant components and simplifying the overall system architecture.
Solution Approach 2:
The common rotor and shared magnetic field system perform multiple functions simultaneously - the rotor acts as both the motor rotor and generator rotor, while the magnetic field serves both motor excitation and generator field generation. This multi-functionality reduces the number of separate components needed and simplifies the system structure.
3Reliability
If the exciting winding phases are not synchronized, then the electric motor and power generator can operate at different speeds, but the counter electromotive force creates negative effects
Solution Approach 1:
The patent employs periodic phase switching of the exciting windings through a controller that sequentially energizes different phases. This periodic action synchronizes the magnetic field generation between the motor and generator, ensuring that the counter electromotive forces are converted into positive effects. The phase switching creates a coordinated magnetic field pattern that eliminates interference while allowing flexible speed operation.
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 the electric motor and power generator to operate in the same direction, enhancing their efficiency by converting the interference effect into a positive influence, thereby improving kinetic and power generation capabilities.
Implementation Method 1
the magnetic field of the electric motor and the magnetic field of the power generator are improved by changing to the same magnetic field coupling
Implementation Method 2
the electric motor generates an induction potential in normal operations, and this potential is called counter electromotive force (cemf) which will block the moving direction of an induction potential conductor
Implementation Method 3
the phases of an exciting winding of the electric motor will be changed and transmitted to a phase voltage sequentially by a DC brushless drive controller to drive the rotor to operate
Data Source
AI summary
A kinetic power generation unit improves the magnetic field of an electric motor and the magnetic field of a power generator into a same magnetic field coupling of a same rotor, so that the rotors of electric motor and the power generator have the same rotational direction, and an exciting winding of the electric motor changes and transmits phases sequentially to a phase voltage by a brushless drive controller, so that an interference effect on the counter electromotive force of the electric motor and the counter-electromotive force of the power generator is changed to a positive effect.