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Driving method and system for stepping motor of digital instrument

A technology of stepping motors and digital instruments, applied in the direction of electrical components, electric pulse generation, pulse generation, etc., can solve the problem of not being able to determine the running process of the motor in real time, and achieve the effect of ensuring accuracy

Active Publication Date: 2017-11-24
BEIQI FOTON MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the running process of the motor cannot be determined in real time when driving the stepping motor in the digital instrument in the prior art, thereby proposing a driving method and system for the stepping motor of the digital instrument

Method used

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  • Driving method and system for stepping motor of digital instrument
  • Driving method and system for stepping motor of digital instrument
  • Driving method and system for stepping motor of digital instrument

Examples

Experimental program
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Embodiment 1

[0049] This embodiment provides a driving method for a stepping motor of a digital instrument, see figure 1 shown, including the following steps:

[0050] S1: Obtain the target position of the stepper motor.

[0051] S2: Acquiring the current position of the stepping motor in real time, judging whether the current position is equal to the target position, and returning to step S1 if they are equal, otherwise entering step S3.

[0052] S3: Obtain the duty cycle of each drive pulse signal according to the current position.

[0053] S4: Outputting a driving pulse signal with a corresponding duty ratio to drive the stepping motor to rotate for one step, and then return to the step S2.

[0054] In the driving method of the digital instrument stepper motor in this embodiment, the current position and the target position of the stepper motor are determined by obtaining the operating state of the motor in real time in the control flow, and comparing the current position with the targe...

Embodiment 2

[0077] This embodiment provides a driving system for a digital instrument stepper motor, such as Figure 4 As shown, it includes a first data acquisition module, a second data acquisition module, a data processing module and a drive signal output module. in:

[0078] The first data acquisition module is used to acquire the target position of the stepping motor. The second data acquisition module is used for acquiring the current position of the stepper motor in real time, and judging whether the current position is equal to the target position. The data processing module is used for not needing to drive the stepper motor when the current position is equal to the target position, otherwise, the duty ratio of each drive pulse signal is obtained according to the current position. The driving signal output module is used to output a driving pulse signal corresponding to a duty ratio to drive the stepping motor to rotate until the current position of the motor is equal to the tar...

Embodiment 3

[0084] This embodiment provides a method for driving a stepping motor by using a central processing unit in a digital instrument. The central processing unit uses the driving method for a stepping motor of a digital instrument described in Embodiment 1 to output a driving pulse signal to drive the stepping motor. Wherein said central processing unit is MC9S12H256 chip, and it has 24 PWM output ports, wherein 4 PWM output ports are connected with the voltage input end of the stator magnetic field coil of a stepper motor to be driven as the output end of drive pulse signal, this It can drive 6 stepping motors at the same time, which can well meet the number of motors that need to be driven on the pointer instrument panel in the digital instrument.

[0085] Such as Figure 5 A schematic diagram of the circuit connection between the MC9S12H256 chip and the stepping motor is given.

[0086] Figure 5 The shown M0C0M / PUO, M0C0P / PU1, M0C1M / PU2, M0C1P / PU3 are the first group, which ...

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Abstract

The invention provides a digital instrument stepper motor driving method and a system. through acquiring an operation state of a motor in real time in a control process, the current position and a target position of the stepper motor are judged, the current position and the target position are compared, a program for driving the stepper motor is started when the current position and the target position are not consistent, and according to the current position of the stepper motor, the duty ratio of a driving pulse signal is adjusted to drive the stepper motor to rotate until the current position of the motor is the same as the target position. Thus, according to the above scheme, through determining the operation state of the stepper motor in real time, the operation process of the stepper motor is controlled, and when the method and the system are applied to a pointer-type dashboard, the working state of the vehicle can be accurately reflected in real time.

Description

technical field [0001] The invention relates to the driving field of a stepping motor, in particular to a driving method and system for a stepping motor of a digital instrument. Background technique [0002] At present, the instruments on automobiles generally adopt digital instruments. The instruments are composed of pointer instrument panels, alarm indicators, fault diagnosis display screens, and light-touch buttons. : Engine speed, vehicle speed, water temperature, oil quantity, if the truck also needs to increase the front axle air pressure and rear axle air pressure, so six stepper motors are needed. In order for the pointer instrument panel to correctly display the working parameters of the vehicle, it is necessary to drive the stepper motor. [0003] Chinese patent document CN202586854U discloses a digital stepper motor driver, including a main control chip and a control interface circuit, wherein the control interface circuit includes a differential control signal c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K3/017
Inventor 马东辉朱利明宁昀鹏
Owner BEIQI FOTON MOTOR CO LTD
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