Self-adaptive control miniature motor

Patent metadata

Field	Value
Publication number	US-10944313-B2
Application number	US-201515758879-A
Country	US
Kind code	B2
Filing date	Dec 15, 2015
Priority date	Sep 24, 2015
Publication date	Mar 9, 2021
Grant date	Mar 9, 2021

Abstract

A self-adaptive control miniature motor comprises a driving unit (200), a mover (300) and a self-adaptive control unit (100). The driving unit comprises a fixed stator and a movable vibration block, and provides the driving force for the reciprocating motion of the mover through the interaction between the stator and the vibration block. The mover is a forced vibration part, and is driven by the movable vibration block of the driving unit to do the reciprocating motion. The self-adaptive control unit is used for controlling a motion state of the mover in real time by adjusting a force applied on the mover, based on a feedback information of the motion state of the mover. The self-adaptive control miniature motor, by combining the motor hardware with a control circuit, facilitates real-time adjustment of the magnetic field intensity in the motor, thus improving the stability of the vibration of the motor.

First claim

The invention claimed is:

1. A self-adaptively controlled miniature motor, comprising a driving unit and a mover, wherein the driving unit comprises a fixed stator and a movable vibration block, and a driving force for a reciprocating motion is provided for the mover through an interaction force between the stator and the vibration block; the mover is a forced vibration part, and does the reciprocating motion driven by the movable vibration block of the driving unit, wherein
the self-adaptively controlled miniature motor further comprises a self-adaptive controller for controlling a motion state of the mover in real time by adjusting a force applied on the mover, according to a feedback information of the motion state of the mover,
wherein the self-adaptive controller comprises a control chip and a magnetic field force controller, wherein,
the control chip is used for adjusting and controlling an external input signal according to the feedback information of the motion state of the mover and determining a real-time control signal output to the magnetic field force controller; and
the magnetic field force controller is used for providing a real-time controlled force for the mover under the control of the control signal,
wherein the control chip comprises:
a feedback signal collector, for collecting a voltage signal or a current signal fed back from the mover;
a difference determination part, for determining an error signal for adjusting the motion state of the mover according to the signal collected by the feedback signal collector;
a self-adaptive filter, for self-adaptively filtering the external input signal according to the error signal determined by the difference determination part; and
a power amplifier, for performing power amplifying to the signal filtered by the self-adaptive filter to output the real-time control signal to the magnetic field force controller,
wherein the difference determination part determines the error signal by taking the feedback information of the motion state of the mover as an input signal, extracting a current waveform representing a current motion state of the mover in the input signal, comparing the current waveform with a preset sine waveform, and generating the error signal based on the difference between the current waveform and the present sine waveform.

2. The self-adaptively controlled miniature motor according to claim 1 , wherein in a process that the difference determination part and the self-adaptive filter determine the error signal for adjusting the motion state of the mover according to the signal collected by the feedback signal collector and perform self-adaptive filtering for the external input signal according to the error signal determined by the difference determination part, the process comprises four stages of “extraction-comparison-correction-determination”,
the self-adaptive filter adjusts a filtering parameter thereof according to the error signal and corrects the external input signal according to the filtering parameter;
after the external input signal is corrected, it is determined whether the corrected external input signal is sufficient to adjust the motion state of the mover to a preset state, if the corrected external input signal is not sufficient to adjust the motion state of the mover to the preset state, the process comprising “extraction-comparison-correction-determination” is carried out again by taking the corrected external input signal as the feedback information of the motion state of the mover, until the corrected external input signal is sufficient to adjust the motion state of the mover to the preset state.

3. The self-adaptively controlled miniature motor according to claim 1 , wherein
the control chip is a built-in circuit or a peripheral circuit of the self-adaptively controlled miniature motor.

4. The self-adaptively controlled miniature motor according to claim 1 , wherein
the magnetic field force controller comprises a movable part and a fixed part for applying a force on the movable part, wherein
the movable part is coupled with the mover and does the reciprocating motion together with the mover, and the fixed part is stationary with respect to the stator.

5. The self-adaptively controlled miniature motor according to claim 4 , wherein
the movable part is a permanent magnet, an electromagnet or a multi-turn coil that is fixedly coupled with the mover.

6. The self-adaptively controlled miniature motor according to claim 1 , wherein
the vibration block comprises at least two permanent magnets disposed adjacent to each other and a magnetic conductive yoke disposed between any two adjacent permanent magnets, and adjacent ends of two adjacent permanent magnets have the same polarities;
the stator comprises a coil and a magnetic conductive core provided in the coil; and
a magnetization direction of the permanent magnets is perpendicular to an axial direction of the coil.

7. The self-adaptively controlled miniature motor according to claim 6 , wherein
the magnetic conductive yoke and the magnetic conductive core are misaligned; and
a horizontal distance d between the magnetic conductive yoke and the magnetic conductive core corresponding to the magnetic conductive yoke is within a numerical range of 0.1 mm to 0.3 mm.

8. The self-adaptively controlled miniature motor according to claim 1 , wherein
the stator and the vibration block are arranged in a vertical direction, and a vibration direction of the vibration block is parallel to a mounting plane of the stator.

9. The self-adaptively controlled miniature motor according to claim 6 , wherein
the stator and the vibration block are arranged in a vertical direction, and a vibration direction of the vibration block is parallel to a mounting plane of the stator.

10. A self-adaptively controlled miniature motor, comprising a driving unit and a mover, wherein the driving unit comprises a fixed stator and a movable vibration block, and a driving force for a reciprocating motion is provided for the mover through an interaction force between the stator and the vibration block; the mover is a forced vibration part, and does the reciprocating motion driven by the movable vibration block of the driving unit, wherein
the self-adaptively controlled miniature motor further comprises a self-adaptive controller for controlling a motion state of the mover in real time by adjusting a force applied on the mover, according to a feedback information of the motion state of the mover,
wherein the self-adaptive controller comprises a control chip and a magnetic field force controller, wherein,
the control chip is used for adjusting and controlling an external input signal according to the feedback information of the motion state of the mover and determining a real-time control signal output to the magnetic field force controller; and
the magnetic field force controller is used for providing a real-time controlled force for the mover under the control of the control signal,
wherein the control chip comprises:
a feedback signal collector, for collecting a voltage signal or a current signal fed back from the mover;
a difference determination part, for determining an error signal for adjusting the motion state of the mover according to the signal collected by the feedback signal collector;
a self-adaptive filter, for self-adaptively filtering the external input signal according to the error signal determined by the difference determination part; and
a power amplifier, for performing power amplifying to the signal filtered by the self-adaptive filter to output the real-time control signal to the magnetic field force controller, wherein
the vibration block comprises at least two

Assignees

• Goertek Inc

Inventors

• Zu Fenglei
• Liu Chunfa

Classifications

• A63F13/24 Primary

  Constructional details thereof, e.g. game controllers with detachable joystick handles · CPC title

• H02K33/16

  with polarised armatures moving in alternate directions by reversal or energisation of a single coil system · CPC title

• G06F3/016

  Input arrangements with force or tactile feedback as computer generated output to the user · CPC title

• G06F2203/013

  Force feedback applied to a game · CPC title

• H02P25/032

  Reciprocating, oscillating or vibrating motors · CPC title