Multi-Tunnel Electric Machine With Halbach Flux Concentration
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Solution Overview
Problem
Conventional electric motors and generators face inefficiencies in energy conversion due to limitations in flux density and torque production, leading to increased energy consumption and costs as energy becomes scarcer and more expensive.
Innovation Solution
The implementation of a magnetic toroidal cylinder with multiple magnetic tunnels and Halbach arrays enhances flux density by strategically arranging magnets with NNNN and SSSS magnetic pole configurations, allowing for increased torque production and efficiency by channeling magnetic flux in a circumferential direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional motors use traditional magnetic field configurations, then the structure is simple, but the flux density and torque production are limited
Solution Approach 1:
The magnetic field structure is divided into multiple magnetic tunnels (first, second, third, and fourth magnetic tunnels) with different pole configurations (NNNN, SSSS, NSNS, SNES). Each tunnel segment independently contributes to flux density, allowing the system to achieve high torque production through cumulative effect of segmented magnetic paths.
Solution Approach 2:
The patent transitions from conventional two-dimensional magnetic field arrangements to a three-dimensional multi-tunnel configuration. By stacking multiple magnetic tunnels in the radial direction with alternating pole configurations, the system increases flux density in the axial dimension, thereby enhancing torque production without proportionally increasing device footprint.
2Use of energy by moving object
If conventional generators produce sinusoidal voltage, then the design is traditional, but energy efficiency is reduced due to higher energy consumption
Solution Approach 1:
The patent fundamentally changes the voltage waveform parameter from conventional sinusoidal to square wave output. This parameter change enables more efficient energy conversion by reducing copper losses and improving power factor, directly addressing energy efficiency concerns. The square wave configuration allows for better utilization of magnetic flux and reduced idle current consumption.
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 results in higher torque and power density, reduced vibration and noise, and minimized energy consumption, enabling continuous torque and power output with reduced locked rotor current and inrush current, while maintaining compactness and efficient cooling.
Implementation Method 1
a first plurality of permanent magnets radially arranged about an axial axis to form a first magnetic tunnel... a second plurality of permanent magnets radially arranged about the axial axis to form a second magnetic tunnel... Halbach arrays
Implementation Method 2
strategically arranging magnets with NNNN and SSSS magnetic pole configurations, allowing for increased torque production and efficiency by channeling magnetic flux
Implementation Method 3
Generators are usually based on the principle of electromagnetic induction, which was discovered by Michael Faraday in 1831. Faraday discovered that when an electrical conducting material (such as copper) is moved through a magnetic field (or vice versa), an electric current will begin to flow through that material.
Implementation Method 4
Electric motors use electrical energy to produce mechanical energy, very typically through the interaction of magnetic fields and current-carrying conductors. The conversion of electrical energy into mechanical energy by electromagnetic means was first demonstrated by the British scientist Michael Faraday in 1821 and later quantified by the work of Hendrik Lorentz.
Data Source
AI summary
Disclosed are various embodiments for an electric machine where the stator is a coil assembly and the rotor is a magnetic toroidal cylindrical tunnel or where the rotor is a coil assembly and the stator is a magnetic toroidal cylindrical tunnel.