Unlock instant, AI-driven research and patent intelligence for your innovation.

A voice coil motor driving method

A driving method and technology of voice coil motor, applied in the direction of AC motor control, DC motor speed/torque control, control system, etc., can solve the problems of strengthening motor resonance, long motor stabilization time, large step amplitude, etc. Small step amplitude, the effect of shortening the focusing time

Active Publication Date: 2019-06-28
CHIPSEMI SEMICON (NINGBO) CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] existing algorithms such as figure 1 , figure 2 As shown, the motor is a step from the initial value to the intermediate value, and another step from the intermediate value to the target value. According to the Fourier formula, it can be seen that the step part contains a large number of high-frequency signals, and the step amplitude is large , these high-frequency signals and large-amplitude steps will strengthen the motor resonance, causing the motor to settle for too long

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A voice coil motor driving method
  • A voice coil motor driving method
  • A voice coil motor driving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] A method for driving a voice coil motor. The motor stroke first steps from an initial value to an intermediate value, and then from an intermediate value to a target value. Between the initial value and the first intermediate value, between adjacent intermediate values, and finally The amplitude step between an intermediate value and the target value includes the intermediate step amplitude and the slope waveform at both ends. The slope waveform is fitted by N-order transition waveform to reduce the step amplitude. N is an integer greater than or equal to 1 .

[0017] The following examples illustrate in detail, such as image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the present invention optimizes the existing algorithm by eliminating the right angle and using the method of approximating oblique lines, so as to achieve the purpose of reducing the high-frequency component of the algorithm, reducing the step amplitude, and shortening t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of a voice coil motor, specifically to a voice coil motor driving method that can effectively reduce high frequency components in a motor driving algorithm, reduce the step amplitude and shorten the motor focusing time. The motor trip steps from an initial value to an intermediate value and then from the intermediate value to a target value. The voice coil motor driving method is characterized in that the magnitude steps between the initial value and a first intermediate value, between adjacent intermediate values, and between a last intermediate value and the target value include an intermediate step amplitude and slant waveforms at both ends, and the slant waveforms are fitted by an N-order transition waveform to reduce the step amplitude, where N is an integer greater than or equal to 1.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method for driving a voice coil motor. Background technique [0002] A voice coil motor is a device that converts electrical energy into mechanical energy, and realizes linear and limited swing angle motion. A device that uses the interaction between the magnetic field from the permanent magnet steel and the magnetic poles in the magnetic field generated by the energized coil conductor to produce regular motion. Because the voice coil motor is a non-commutating power device, its positioning accuracy depends on the feedback and control system, so VCM is often used to drive the lens. [0003] The main components of VCM are relatively simple, such as coils (inductive devices), springs, magnets, and some fixed structures. Inductive devices exhibit high resonant response characteristics due to their own resonant frequency, which can easily cause ringing during operation, aff...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02P25/034H02P7/025
CPCH02P7/025H02P25/034
Inventor 尹有杰魏昊杨超蒋超
Owner CHIPSEMI SEMICON (NINGBO) CO LTD