Multi-Phase Winding Deflection Scanning Device
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Solution Overview
Problem
Existing deflection scanning devices with 2-phase windings suffer from severe additional defocusing and limited deflection scanning range and frequency due to non-uniform magnetic induction intensity, which restricts their broadband and wide-angle scanning capabilities.
Innovation Solution
A multi-phase winding deflection scanning device with an axisymmetric structure, featuring a ferromagnetic frame with equally distributed wire slots and phase windings whose axes are symmetrically arranged, producing a resultant magnetomotive force that drives the charged particle beam perpendicular to its flight direction, enhancing magnetic induction uniformity and increasing the scanning range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a 2-phase winding deflection scanning device is used, then the device complexity is reduced, but the magnetic induction intensity uniformity deteriorates causing severe additional defocusing
Solution Approach 1:
The patent changes the parameter of winding phase number from 2-phase to multi-phase (3-phase or more) to improve magnetic induction intensity uniformity. This parameter change directly addresses the technical contradiction by accepting increased device complexity in exchange for significantly improved scanning precision and reduced additional defocusing effects.
2Speed
If the DC power supply voltage is increased to enable high frequency operation, then the operating frequency is improved, but the power consumption and overheating of the winding drive circuit increases
Solution Approach 1:
The patent changes the electrical parameter of operating frequency by optimizing the winding design and drive circuit configuration. The multi-phase winding structure allows for improved frequency response without requiring excessive voltage increases, thereby managing power consumption more effectively while achieving broadband operation.
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 multi-phase winding design improves the uniformity of magnetic induction intensity, expands the scanning range, and allows for higher operating frequencies with reduced power consumption, enhancing the dynamic response speed and scanning accuracy.
Implementation Method 1
after energization, the w-phase winding produces resultant magnetomotive force perpendicular to the flight direction of the charged particle beam on the cross section of the deflection scanning device
Implementation Method 2
the resultant magnetomotive force produces directly proportional resultant magnetic induction intensity, and the resultant magnetic induction intensity drives the charged particle beam to move
Implementation Method 3
the deflection scanning device comprises: a ferromagnetic frame and a deflection scanning winding
Implementation Method 4
the non-salient-pole magnetic deflection scanning device includes a ferromagnetic frame and a deflection scanning winding, wherein the ferromagnetic frame is provided with 2aw wire slots extending longitudinally and equally distributed along the circumference
Data Source
AI summary
The present invention relates to a deflection scanning device with a multi-phase winding and a deflection scanning system. The deflection scanning device is of an axisymmetric structure, and comprises a ferromagnetic frame and a deflection scanning winding, wherein the inner side of the ferromagnetic frame is longitudinally provided with 2aw wire slots equally distributed along the circumference; and the deflection scanning winding comprises a w-phase winding, wherein the axis of the each phase winding is symmetrically distributed. The deflection scanning system comprises a deflection scanning device, a drive power supply unit and, a central, control unit. The deflection scanning device of the present invention can improve the uniformity of the magnetic induction intensity in the charged particle beam channel, and then reduce the defocusing effect and improve the scanning accuracy.