Permanent Magnet Motor Pulse Control for Self-Starting Rotation
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Solution Overview
Problem
Conventional electric motors with permanent magnets are limited by the current understanding of magnetism, necessitating a need for more performant, efficient, and versatile electric motors to reduce environmental footprint and enhance autonomy and flexibility, particularly in applications like HVAC systems and transportation.
Innovation Solution
Electric motors utilizing a rotor with permanent magnets interacting with salient stator poles, employing magnetic flux pulses to initiate and sustain rotation, with control systems to manage magnetic attraction and repulsion for continuous motion, including self-starting, speed control, and dynamic braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional motor designs are used, then basic motor functions are achieved, but efficiency is low and control is complex
Solution Approach 1:
The patent replaces conventional complex control systems with sensorless control algorithms that infer rotor position and speed from electrical measurements, eliminating the need for physical sensors and complex control hardware while improving efficiency through optimized current control
2Measurement precision
If sensors are added for precise control, then control accuracy improves, but device complexity and cost increase
Solution Approach 1:
The motor system uses its own electrical parameters (current, voltage, frequency) to self-determine rotor position and speed through sensorless control algorithms, eliminating the need for external sensors and achieving precise control without additional hardware complexity
Solution Approach 2:
The patent introduces mathematical models and estimation algorithms as intermediaries that translate easily measurable electrical parameters into accurate rotor position and speed information, achieving precise measurement without direct physical sensing
3Power
If motor size is increased for higher power output, then power capability improves, but installation space requirements increase
Solution Approach 1:
The patent optimizes motor design parameters including magnetic material properties, winding configurations, and geometric dimensions to achieve higher power density, allowing increased power output within constrained volume through improved electromagnetic efficiency
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
The motors achieve high efficiency, self-starting, and continuous rotation with minimal heat generation, offering modular construction and constant torque/force, utilizing magnetic flux pulses for enhanced performance.
Implementation Method 1
a three-phase motor 300 having a stator 310 and a rotor 320, respectively
Implementation Method 2
wherein the rotating speed of the rotor is controlled by controlling a frequency of a power source
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
Electric motors and methods of controlling electric motors are described herein. The electric motors include a mobile component having at least one permanent magnet coupled thereto and a stator spaced apart from the mobile component. The stator includes at least one stator pole having a ferromagnetic core and a coil wrapped around the ferromagnetic core. The ferromagnetic core is naturally attracted to the at least one permanent magnet. The motors also include a magnetic position control system configured to monitor a position of the at least one permanent magnet relative to the stator and controllably deliver an electric pulse to the coil of each stator pole to generate a repulsive magnetic flux on the ferromagnetic core to cancel an attraction force between the ferromagnetic core and the at least one permanent magnet to control movement of the mobile component.