Permanent Magnet Generator Short Pitch Winding Power Output
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Solution Overview
Problem
Conventional permanent magnet generators face challenges in increasing electric power output while maintaining a compact size, as the voltage and power are limited by the magnetic force, frequency, and number of windings, with existing winding methods failing to effectively enhance power without increasing generator size.
Innovation Solution
The solution involves winding multiple stator windings at a short pitch with a shifted tooth configuration, allowing each winding to generate electromotive voltage independently, which are then rectified to DC and combined, increasing power output without enlarging the generator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional single winding method is used in permanent magnet generator, then the generator structure is simple, but the electric power output is limited and cannot be increased without enlarging the generator size
Solution Approach 1:
The stator windings are divided into multiple independent windings (first winding and second winding) instead of using a single winding. Each winding is wound at a short pitch and shifted by one tooth position, allowing them to generate electromotive voltages independently that can be combined to increase total power output without increasing generator volume
Solution Approach 2:
The invention introduces a new dimension of winding configuration by shifting windings in the tooth position domain rather than simply increasing winding turns in the traditional direction. The windings are shifted by one tooth position and wound at short pitch, creating phase differences that enable power addition without increasing the physical size of the generator
2Power
If multiple windings are added to increase power output, then the electric power increases, but the device complexity increases
Solution Approach 1:
Each winding has a specific local characteristic: the first winding is wound at a short pitch and shifted by one tooth position, while the second winding has a different winding direction and phase. These local quality differences create independent electromotive voltages that can be combined to increase power while maintaining manageable complexity through systematic differentiation
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 doubles or triples the electric power output of conventional generators without increasing size, by optimizing the magnetic flux distribution and reducing cogging torque, while maintaining a compact design.
Implementation Method 1
a rotor shaft rotatably supported by a housing; a rotor fixed to the rotor shaft and mounted with a plurality of permanent magnet members on an outer periphery side 48; and a stator disposed at the outside of the rotor with a winding
Data Source
AI summary
The present invention relates to a plurality windings of U phase corresponding to one magnetic pole including first and second windings wound in a short pitch winding manner. The winding starts of the first and second windings are shifted by at least one tooth. The windings are wound so that a winding angle occupied by the windings inter-slot angle from the winding start of the first winding to the winding end of the second winding corresponds to a pole angle. The windings in the V phase are disposed in the same relationship as in the U phase at the position delayed by an electric angle of 120 degrees with respect to the U phase, and those in the W phase are disposed at the position delayed by an additional 120 degrees. The outputs of the windings are then each rectified, subsequently joined together and used by adding currents.