Compact Variable-Speed Permanent Magnet Motor Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric motors with permanent magnets face size constraints and inefficiencies in providing high torque at variable speeds, particularly when trying to maintain compactness and high efficiency.
Innovation Solution
A compact high-efficiency motor design incorporating at least two sets of permanent magnets and electromagnets controlled by a system to modulate magnetic fields, allowing for variable-speed operation with high torque, where the magnetic polarity and interaction between the magnets are dynamically adjusted to sequence through rotation-induced steps, enabling efficient energy use and recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a motor design with two sets of permanent magnets and electromagnets is used to provide high torque at variable speeds, then the torque and efficiency are improved, but the motor size increases and becomes incompatible with compact applications
Solution Approach 1:
The motor is divided into two distinct magnetic systems: a passive magnetic system with permanent magnets that provides the primary magnetic field, and an active electromagnetic system with electromagnets that provides controlled modulation. This segmentation allows each system to be optimized independently, enabling high torque output while maintaining a compact overall structure.
Solution Approach 2:
The electromagnets are dynamically controlled to modulate the magnetic field strength and polarity in real-time, enabling variable-speed operation and high torque delivery. This dynamic control allows the motor to adapt its magnetic field characteristics to match load requirements, maximizing torque density without increasing physical size.
2Adaptability or versatility
If permanent magnets are used to provide one magnetic field and electromagnets are used to generate the other, then variable-speed control and high efficiency are achieved, but the device complexity increases
Solution Approach 1:
The electromagnet assembly serves multiple functions: it generates the second magnetic field, modulates the overall magnetic field strength, enables variable-speed control, and provides directional control. This multi-functionality reduces the need for separate control mechanisms, thereby managing complexity while achieving versatile variable-speed operation.
Solution Approach 2:
The motor achieves variable-speed control by changing the electrical parameters (current magnitude and polarity) supplied to the electromagnets. By modulating these parameters, the magnetic field characteristics are dynamically adjusted, enabling precise speed and torque control without complex mechanical transmission systems.
3Force
If the magnetic centers are offset to induce torque on the rotor, then torque generation is achieved, but the magnetic attraction and efficiency are reduced
Solution Approach 1:
The electromagnets are activated in a periodic sequence, creating alternating zones of magnetic attraction and repulsion as the rotor turns. This periodic modulation of the magnetic field ensures that the magnetic centers are offset only when needed to generate torque, while maintaining strong magnetic attraction during other phases of the cycle, thereby reducing energy loss.
Solution Approach 2:
The passive permanent magnets continuously provide a strong magnetic field, while the active electromagnets continuously modulate this field to maintain optimal torque generation. This continuous interaction ensures that the magnetic attraction is maximized throughout the entire rotation cycle, minimizing energy loss while sustaining torque output.
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 motor achieves high torque and efficiency with minimal power consumption, is environmentally friendly, and can be used in applications where size is a constraint, while also allowing for smooth torque generation and reversible operation.
Implementation Method 1
electromagnets incorporated to be energized by a control system to provide a variable-speed motor
Implementation Method 2
An electric/magnetic motor operates by utilizing the magnetic attraction/repulsion between magnetic fields that are from the rotor and stator
Implementation Method 3
the magnetic effect between the at two sets of magnetics can be modulated or otherwise modified or changed to sequence through a series of rotation-induced steps by controlling the associated interaction of the magnetic fields
Data Source
AI summary
A compact high-efficiency motor is disclosed. The motor includes at least two rotor segments having passive magnetics comprising permanent magnets and at least two stator segments having active magnetics comprising permanent magnets and associated electromagnets controlled by a control system. The magnetic effect between the at two sets of magnetics can be modified to sequence the rotor segments through a series of rotation-induced steps by controlling the associated interaction of the magnetic fields produced by the two sets of magnetics. The electromagnets are energized by a control system to provide a variable-speed motor that produces high torque.