Rotary Machine Connector Radial Positioning for Sensor Signal Integrity
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Solution Overview
Problem
Rotary electrical machines face electromagnetic interference issues due to connectors disrupting measurement signals from the angular position measurement element, caused by the magnetic fields generated by current passing through them.
Innovation Solution
The connectors are positioned radially between the stator body's outer periphery and the base of a notch, spaced from the measurement element, and a protective magnetic screen is used to prevent interference, allowing for precise angular positioning of phase outputs without disrupting the measurement signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connector extends circumferentially opposite the measurement element to connect pins of a single phase winding, then electrical connection between phase windings is achieved, but magnetic interference disrupts the measurement signals from the measurement element
Solution Approach 1:
The connector is repositioned from an axial extension to a radial position between the stator body outer periphery and the notch base. This spatial reconfiguration in the radial dimension separates the connector from the measurement element's axial plane, eliminating magnetic interference while preserving electrical connectivity between pins of the same phase winding
2Object-affected harmful factors
If the connector is positioned radially between the stator body outer periphery and the notch base, then magnetic interference with the measurement element is minimized, but the angular positioning of phase outputs becomes more complex
Solution Approach 1:
The connector is positioned at a specific radial location between the stator body outer periphery and the notch base, creating a localized solution that addresses magnetic interference in the measurement element region without affecting the overall angular positioning of phase outputs. This localized positioning maintains electrical connectivity while eliminating harmful magnetic fields from the sensor area
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 effectively minimizes magnetic interference between the connectors and the measurement signals, ensuring accurate angular position measurements of the rotor.
Implementation Method 1
because of the current which passes through it, a connector of this type generates a magnetic field which disrupts the signals obtained from the measurement element
Implementation Method 2
a protective magnetic screen is used to prevent interference
Data Source
AI summary
The invention relates mainly to a rotary electrical machine comprising: a rotor (12); a device (51) for measurement of the angular position of the rotor (12); a stator (11) comprising: a body comprising a plurality of notches; a winding (24) comprising a plurality of phase windings, each having a winding input and a winding output; each phase winding being formed by a plurality of pins (45) inserted in the notches and forming a chignon (40); at least one connector (48) which connects two pins of a single winding; the connector (48) extending opposite the measurement element (52); the connector (48) comprising a portion which is situated radially between an outer periphery of the body (23) and a base of a notch.