Universal Motor With Intermediate Screening Component
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Solution Overview
Problem
Electric motors with both rotor and stator windings face efficiency drops dramatically when operating away from their optimum frequency, necessitating the use of costly gearing systems to maintain efficiency at different speeds.
Innovation Solution
Incorporating an intermediate screening component between the rotor and stator, which is magnetically active and rotationally mounted, allowing independent control of the windings to decouple magnetic fields and enable efficient operation across a range of speeds without the need for gearing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If motors are operated away from their optimum operating frequency, then they can drive axles at different speeds, but the efficiency drops dramatically
Solution Approach 1:
The motor is divided into two independent motor systems: a stator motor and a rotor motor. Each motor can operate independently at its own optimum frequency, allowing the combined system to achieve multiple different rotational speeds while maintaining high efficiency in each component.
Solution Approach 2:
The motor system dynamically adjusts the operation mode by independently controlling the stator and rotor motors. The rotor can be powered alone, the stator alone, or both together, enabling the system to adapt to different speed requirements while maintaining optimal efficiency points for each motor.
2Loss of energy
If gearing systems are added to maintain efficiency at different speeds, then the motor can operate close to its optimum rotation frequency, but the cost increases and efficiency is reduced by the gears themselves
Solution Approach 1:
The gearing system is completely removed from the design. Instead of using mechanical gears to adjust speed, the invention extracts the speed control function and implements it through independent electrical control of the stator and rotor motors, eliminating the need for mechanical transmission components.
Solution Approach 2:
The mechanical gearing system is replaced with an electrical control system. Speed adjustment is achieved through electrical means by independently powering the stator and rotor motors at different frequencies and power levels, substituting mechanical speed reduction with electrical frequency control.
3Adaptability or versatility
If an intermediate screening component is added to decouple magnetic fields, then independent control is enabled, but the device complexity increases
Solution Approach 1:
An intermediate screening component is introduced between the stator and rotor to act as a magnetic field mediator. This component decouples the magnetic fields of the two motors, allowing independent control of each motor while preventing magnetic interference between them.
Solution Approach 2:
The intermediate screening component serves multiple functions: it provides magnetic screening between the stator and rotor, supports the rotor assembly, and enables the decoupling necessary for independent motor operation. This multi-functionality justifies the added component by providing several benefits simultaneously.
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 motor to maintain high efficiency at various speeds, reducing the need for gearing and transmission systems, thereby decreasing costs and improving efficiency by enabling independent operation of the rotor and stator components.
Implementation Method 1
an intermediate screening component rotationally mounted between said stator component and said rotor component and configured to provide at least some magnetic screening between said rotor component and said stator component
Implementation Method 2
changing magnetic fields generated by changing electric currents in said windings on either said rotor component or said stator component generate a force on said magnetically active sections causing said intermediate screening component to rotate
Data Source
Figure 1a~1b
Figure 2~3
Figure 4~5
AI summary
An electric motor apparatus comprising: a stator component and a rotor component rotationally mounted coaxially with and within the stator component. The stator component and the rotor component each comprise windings configured to generate an electromagnetic field from an electric current. The electric motor further comprises an intermediate screening component rotationally mounted between the stator component and the rotor component and configured to provide at least some magnetic screening between the rotor component and the stator component. The intermediate screening component comprises at least some magnetically active sections configured such that changing magnetic fields generated by changing electric currents in the windings on either the rotor component or the stator component generate a force on the magnetically active sections causing the intermediate screening component to rotate; and control circuitry for independently controlling power supplied to the windings on the rotor component and the stator component in dependence upon a desired output rotational speed.