Motor Magnetic Pole Control for Wide Speed Range Without Gearbox
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Solution Overview
Problem
Existing electrical devices struggle to cover a wide range of speeds without the complexity and space requirements of a gearbox with multiple gear levels, and they often cannot achieve high speeds beyond 10,000 to 20,000 revolutions per minute.
Innovation Solution
The process involves operating an electrical device with an engine by flowing an electric current that generates a magnetic field, creating a second magnetic pole with the same polarity as the first pole, which weakens the magnetic field, allowing the device to operate in a second speed range with higher average speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a gearbox with multiple gear stages is used to cover a wide speed range, then the speed range is expanded, but the device complexity and volume increase
Solution Approach 1:
The patent replaces the mechanical gearbox system with an electromagnetic field control system. By manipulating the magnetic field strength through electrical current control, the motor directly achieves variable speed operation across a wide range without mechanical transmission components. This substitution eliminates the gearbox while maintaining the speed range expansion capability.
Solution Approach 2:
The patent changes the magnetic field parameter (strength) to control motor speed. By adjusting the electrical current to weaken or strengthen the magnetic field, the motor operates at different speeds within a wide range. This parameter-based control replaces the discrete gear stage approach with continuous speed variation.
2Adaptability or versatility
If a gearbox with multiple gear stages is used to cover a wide speed range, then the speed range is expanded, but the device volume increases
Solution Approach 1:
The patent replaces the mechanical gearbox system with an electromagnetic field control system. By manipulating the magnetic field strength through electrical current control, the motor directly achieves variable speed operation across a wide range without mechanical transmission components. This substitution eliminates the gearbox while maintaining the speed range expansion capability.
3Speed
If the motor operates at high speeds (10,000-20,000 rpm), then new functionalities are enabled, but the magnetic field strength must be reduced
Solution Approach 1:
The patent changes the magnetic field parameter (strength) to control motor speed. By adjusting the electrical current to weaken or strengthen the magnetic field, the motor operates at different speeds within a wide range. This parameter-based control replaces the discrete gear stage approach with continuous speed variation.
Solution Approach 2:
The patent makes the magnetic field strength dynamic rather than fixed. By continuously adjusting the electrical current to the motor windings, the magnetic field adapts in real-time to enable operation across the full speed range from low to high speeds (10,000-20,000 rpm), providing dynamic speed control without mechanical transmissions.
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 method enables electrical devices to achieve a significantly wider range of speeds without the need for a gearbox or multiple gear levels, allowing for higher speeds up to 21,000 revolutions per minute and providing flexibility for various applications.
Implementation Method 1
an electrical current I flows through the motor. The electrical current I can generate a magnetic field B
Implementation Method 2
a second magnetic pole with a second polarity is generated in spatial proximity to the first magnetic pole. The first polarity and the second polarity are the same. The generation and arrangement of the second magnetic pole result in a weakening of the magnetic field B
Data Source
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AI summary
The present invention relates to a method for providing a wide range of rotational speeds in an electrical device comprising a motor. In the proposed method, the electrical device is operated in a first speed range, with an electric current I flowing through the motor. The electric current I can generate a magnetic field B. The motor of the electrical device has a first magnetic pole with a first polarity, and in the course of the method, a second magnetic pole with a second polarity is generated in close proximity to the first magnetic pole. The first and second polarities are identical. The generation and arrangement of the second magnetic pole weaken the magnetic field B, thereby enabling the electrical device to be operated in a second speed range. In a second aspect, the invention relates to an electrical device for carrying out the method.The electrical device can be a machine tool or a suction device, such as a vacuum cleaner.