Voice Coil Motor Multiple Mover Coils Load Capacity
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Solution Overview
Problem
Existing voice coil motors with single coils require larger-sized chips for increased power, leading to higher costs due to limited power supply capacity, which cannot satisfy larger load requirements.
Innovation Solution
A voice coil motor design featuring multiple mover coils energized by smaller drive chips, reducing power supply pressure and lowering overall production costs while providing greater electromagnetic driving force to meet larger load demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a single coil is energized with larger power capacity, then the load requirement is satisfied, but the chip size increases significantly and cost increases
Solution Approach 1:
The patent divides the single high-power coil into multiple lower-power coils (first mover coil and second mover coil). Each coil is energized by separate drive chips, distributing the power requirements. This segmentation allows using smaller, cheaper chips while achieving the same total driving force through combined electromagnetic action of multiple coils on the mover.
2Device complexity
If a single coil structure is used, then the device is simple, but the power supply capacity is limited and cannot satisfy larger load requirements
Solution Approach 1:
The patent combines multiple coils (first mover coil and second mover coil) to work together on the same mover. The drive chips control both coils to generate electromagnetic forces that act on the mover simultaneously, merging their effects to achieve greater total power output while keeping individual coil complexity manageable.
3Force
If multiple mover coils are used to increase driving force, then the load capacity increases, but the device complexity increases
Solution Approach 1:
The patent introduces a spatial dimension by positioning multiple coils at different locations around the mover (e.g., opposite sides). This spatial arrangement allows the coils to work in parallel, generating combined electromagnetic force without requiring sequential complex control, thus increasing driving force while managing complexity through geometric distribution.
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 solution enables voice coil motors to handle larger loads with reduced costs by utilizing multiple smaller drive chips, enhancing the application range and efficiency of the voice coil motor.
Implementation Method 1
The magnetic field generated by the magnetic field of the yoke interacts with the magnetic field produced by the magnetic poles to achieve a regular motion
Data Source
AI summary
Disclosed are a voice coil motor a zoom lens and a photography device. The voice coil motor includes a machine shell, a magnet structure, a mover structure and a drive structure. The magnet structure is provided on the machine shell and includes an annular magnetic yoke. The mover structure includes a plurality of mover coils, and the plurality of mover coils are movably sleeved on a yoke section of the annular magnetic yoke. The drive structure includes a plurality of drive chips and the plurality of drive chips are electrically connected to the plurality of mover coils respectively.