Voltage control method for micro vibration motor driving chip

A voltage control method and driving chip technology, applied in the direction of linear DC motor control, etc., can solve problems such as single vibration effect, reduce input influence, increase adjustment range, and improve user experience.

Active Publication Date: 2020-12-08
LEADER MICROELECTRONICS HUIZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this state of use, the vibration effect is single to the user, and different levels of vibration cannot be obtained in combination with actual needs.

Method used

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  • Voltage control method for micro vibration motor driving chip

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment, the preset usage scenario is a mobile phone terminal, the power supply voltage is rated at 3V DC power supply, and the starting voltage of the driver chip is 2.4V. The driver chip is connected with the micro-vibration motor, and the driver chip directly drives the micro-vibration motor to vibrate through the output voltage.

[0042] A vibration intensity database is preset in the driver chip. In this embodiment, five levels of vibration intensity 1 to 5 are preset, and the corresponding duty ratios are 20%, 40%, 60%, 80% and 100%. 100% of them are directly driving the micro vibration motor with 3V voltage.

[0043] The vibration signal database is preset in the driver chip. In this embodiment, the user defines A, B, C, D, E, and F signals, and sets: the vibration intensity of the A signal is level 1, and the vibration time is 0.25 S; B signal vibration intensity is level 2, vibration time is 0.25S; C signal vibration intensity is level 3, vibration ...

Embodiment 2

[0049] The difference between this embodiment and Embodiment 1 is that in the vibration signal database, there is also a signal X, which is defined as other undefined signals (ie default settings), the vibration intensity of signal X is 2, and the vibration time is 0.5S.

[0050] When a signal not defined in the vibration signal database appears, such as signal M, which is not defined in the vibration signal database, it will be automatically classified as signal X, and the driver chip will be driven according to the preset vibration information of the X signal vibration.

Embodiment 3

[0052] In this embodiment, the power supply voltage is 3.6V, and a vibration intensity database is preset in the driver chip. In this embodiment, the preset vibration intensity is 0-80, a total of 81 vibration levels. From low to high, the corresponding duty cycle is 10%, 11%...90%.

[0053] The vibration signal database is preset in the driver chip. In this embodiment, the user defines A, B, C, D, E, and F signals, and sets: the vibration intensity of the A signal is level 1, and the vibration time is 0.2 S; B signal vibration intensity is level 2, vibration time is 0.2S; C signal vibration intensity is level 3, vibration time is 0.2S; D signal vibration intensity is level 4, vibration time is 0.2S; E signal vibration intensity is 5 Level, vibration time is 0.25S; F signal vibration intensity is level 5, vibration time is 0.5S.

[0054] After completing the customization of the required parameters in the database, the power supply voltage directly supplies power to the drive...

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Abstract

The invention discloses a voltage control method for a micro vibration motor driving chip. The method is characterized by comprising the following steps: S1, a vibration signal database is preset in adriving chip, a user customizes a vibration intensity level corresponding to a vibration signal, and each vibration intensity level corresponds to a PWM voltage duty ratio; S2, the driving chip directly obtains voltage from a direct-current power supply to serve as driving voltage, and waits for a vibration signal; S3, the driving chip acquires a vibration signal, and acquires an voltage duty ratio corresponding to output according to the content of the vibration signal database; and S4, the driving chip directly drives the micro vibration motor in a PWM mode, and the duty ratio is the corresponding output voltage duty ratio obtained in the step S3. The driving mode of the driving chip is PWM voltage driving, in cooperation with the vibration signal database, the driving chip is enabled to have enough starting voltage, low voltage can be actually outputted, the adjustable vibration range of the motor is enabled to be larger, and the actual use effect is enabled to be finer and more controllable.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a voltage control method for a miniature brushless vibration motor drive chip Background technique [0002] With the increasing use of smart terminals, the use of device vibration is increasing, such as: in order to achieve the simulation and touch effects of games, it is applied to smart phones; it is used as a reminder on earphones, electronic cigarettes, and various wearable electronic instruments function adopted. The above-mentioned electronic products focus on miniaturization, low power consumption, and long life, so micro-vibration motors are usually used to respond to vibration requirements. [0003] However, it is found in practical applications that the internal power supply voltage of mobile terminals, especially some miniature wearable electronic instruments, is relatively low. For example, a DC low-voltage power supply is usually used, and the voltage is usually rated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/02
CPCH02P7/02
Inventor 张国付
Owner LEADER MICROELECTRONICS HUIZHOU CO LTD
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