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Method and system for driving stepper motor to rotate

A stepping motor, driving pulse technology, applied in the direction of motor generator control, control system, electrical components, etc., can solve the problems of complex driving method, unfavorable stepping motor transition, etc., and achieve the effect of easy control and simple control process

Active Publication Date: 2017-07-11
BEIJING BORGWARD AUTOMOBILE 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 driving method is complicated during the process of the motor from stationary to starting to rotate, which is not conducive to the smooth and fast transition of the stepping motor to the constant speed zone.

Method used

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  • Method and system for driving stepper motor to rotate
  • Method and system for driving stepper motor to rotate
  • Method and system for driving stepper motor to rotate

Examples

Experimental program
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Effect test

Embodiment 1

[0053] This embodiment provides a method for driving a stepping motor to rotate, see figure 1 shown, including the following steps:

[0054] S1: Set the total number N of accelerations required for the stepping motor from start to constant speed operation, and the time t required for the nth acceleration n , n is an integer and 1≤n≤N, meanwhile, t n n-1 . The larger the value of N, the smoother the acceleration process of the stepping motor, but considering the time required to reach a constant speed operation and the memory of the processor driving the acceleration process of the stepping motor, the value of N is generally : 5≤N≤10. set t n n-1 It is guaranteed that as the stepper motor accelerates, when n is closer to N, the time t required for the nth acceleration n shorter.

[0055] S2: According to the total number of times N and the time t required for each acceleration n , to drive the stepper motor.

[0056] S3: After the number of times of acceleration is equa...

Embodiment 2

[0075] A system for driving a stepper motor to rotate provided by this embodiment, see Figure 4 shown, including:

[0076] The data setting module is used to set the total number of acceleration times N required for the motor to run at a constant speed from the start, and the time t required for the nth acceleration n , n is an integer and 1≤n≤N, meanwhile, t n n-1 ;

[0077] Acceleration drive signal output module, used for according to the total number of times N and the time t required for each acceleration n , to drive the motor;

[0078] The constant speed drive signal output module is used to drive the motor to the target position at a constant speed after the number of accelerations is equal to the total number of times N.

[0079] As a preferred solution, on the basis of the above solution, the data setting module specifically includes: a reference time setting submodule and an acceleration array setting submodule, wherein the reference time setting submodule is u...

Embodiment 3

[0085] This embodiment provides a method for driving a stepper motor to rotate by using a central processing unit in a digital instrument. The central processing unit uses the method for driving a stepper motor described in Embodiment 1 to output a driving pulse signal to drive a stepper 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.

[0086] Such as Figure 5 A schematic diagram of the circuit connection between the MC9S12H256 chip and the stepping motor is given.

[0087] Figure 5 The shown M0C0M / PU0, M0C0P / PU1, M0C1M / PU2, M0C1P / PU3 are the first group, which are connected to th...

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Abstract

The invention provides a method and a system for driving the rotation of a stepping motor. The method comprises the steps that a total number N of the times of acceleration needed by the stepping motor from starting to constant-speed running is set, and time tn needed for the nth time of acceleration is set, wherein n is an integer, 1<=n <= N, and simultaneously, tn< tn-1; the stepping motor is driven according to the total number N and the time tn needed for each time of acceleration; and when the number of the times of acceleration is equal to the total number N, the motor is driven to run at a constant speed. When the control method is adopted to drive the stepping motor, only acceleration and constant-speed processes are included, so that the control process is simple; in addition, the total number N of the times of acceleration and the time tn needed for each time of acceleration are respectively adjustable, so that the stability of the running of the stepping motor is facilitated, and that is to say, the stepping motor is enabled to stably and rapidly to rotate to a constant-speed period.

Description

technical field [0001] The invention relates to the technical field of motor drive, in particular to a method and system for driving a stepper motor to rotate. 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, etc., in order to correctly display the working parameters of the vehicle on the pointer instrument panel, it is necessary to drive the stepper motor. A stepper motor is an actuator that converts electrical pulse signals into mechanical angular displacement or linear displacement. The main function of the stepper motor driver is to distribute the received pulse signals to the windings of each phase of the stepper motor in a certain order and distribution method. , so that it can be turned on and off according to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P8/14
Inventor 李琰左从兵艾名升
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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