N-Phase Electric Machine With Integrated Magnetic Encoder Coils
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Solution Overview
Problem
Existing electrical machines require separate systems for power supply management and displacement information determination, leading to reduced compactness and the need for indexing of the mobile organ.
Innovation Solution
An electrical machine design where the power supply and displacement information determination systems are integrated, using a unified coder and sensor system to generate and read a representative signal of the mobile organ's displacement, allowing for simultaneous power supply management and displacement tracking without mechanical indexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate systems are used for power supply management and displacement information determination, then functional reliability is improved, but device compactness deteriorates
Solution Approach 1:
The encoder is integrated into the rotor structure, combining the displacement determination function with the power supply system. The magnetic track is formed directly on the rotor surface, and the sensor is mounted on the stator, eliminating the need for separate indexing mechanisms and reducing overall device volume while maintaining functional reliability.
Solution Approach 2:
The rotor structure serves multiple functions: it generates the magnetic field for power conversion and simultaneously carries the encoder magnetic track for displacement determination. This multi-functionality reduces the number of separate components needed, improving compactness without sacrificing reliability.
2Adaptability or versatility
If separate systems are used for power supply management and displacement information determination, then functional independence is improved, but device complexity deteriorates
Solution Approach 1:
The encoder system is merged with the power supply system by integrating the magnetic track into the rotor and the sensor into the stator structure. This reduces the number of separate components and interconnections needed, simplifying the overall system while maintaining functional independence through magnetic field coupling.
Solution Approach 2:
The mechanical indexing system is replaced with a magnetic field-based encoder system. The magnetic track and sensor provide displacement information without requiring mechanical contact or separate indexing mechanisms, reducing mechanical complexity while maintaining functional independence.
3Measurement precision
If indexing of the mobile organ is implemented, then measurement precision is improved, but device complexity deteriorates
Solution Approach 1:
The mechanical indexing system is replaced with a magnetic encoder system. The magnetic track with North and South poles provides precise displacement measurement through magnetic field detection by the sensor, eliminating the need for mechanical indexing components while maintaining high measurement precision.
Solution Approach 2:
The encoder creates a magnetic field pattern that copies the rotor's angular position information. The sensor detects this magnetic field pattern to determine displacement, providing precise measurement without requiring direct mechanical indexing of the mobile organ.
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 integrated design enhances compactness by eliminating the need for separate components and improves operational efficiency by directly linking power supply management with displacement information, enabling more precise control of the electrical machine.
Implementation Method 1
the widths Ld and/or Le being such that their ratio to NLp is not even or inversely even in order to direct the magnetic flux between the coil and the encoder so that the electrical supply of the coils induces the movement of the encoder and/or the movement of the encoder induces the electrical supply of said coils
Implementation Method 2
the encoder having a magnetic track formed of a succession of npp pairs of North and South magnetic poles of width Lp which are arranged to deliver a pseudo-sinusoidal magnetic field, the sensor comprising at least two sensitive elements arranged at a reading distance from the magnetic track of the encoder
Data Source
Figure 1a~1b
Figure 2~3a
Figure 3b~4
AI summary
The invention relates to an N-phase electric machine comprising a movable member (1) mounted so as to move with respect to a fixed member, a system for determining at least one item of information relating to the movement of said movable member and an electric power supply system (2) that is managed by said item of information, said determination system comprising an encoder (3) having a magnetic strip, the fixed member having an armature (7) equipped with at least one conductive coil per phase, said coils being magnetically coupled to the strip, the armature (7) having pads (8) around which a coil is respectively arranged, said pads each having teeth that are spaced apart by hollows so as to direct the magnetic flux between the coil and the encoder (3) so that the supply of electric power to the coils causes the encoder (3) to move and/or the movement of the encoder (3) causes electric power to be supplied to said coils.