Full-digital subdivision high-accuracy stepper motor controller

A technology of digital controller and stepping motor, which is applied in the direction of motor generator control, control system, control using feedback, etc., can solve the problems of stator current not realizing feedback control, large fluctuation of stator current, poor consistency of analog components, etc. Achieve the effect of improving anti-interference ability and operating reliability, improving operating characteristics, and less debugging work

Inactive Publication Date: 2003-10-29
NANKAI UNIV
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Problems solved by technology

The controller does not have the function of limiting current changes, and there is no communication interface circuit
[0007] The common features of the above three patents are: 1) Use the data table stored in the microprocessor to give the current given value data of the stepper motor through the table look-up method, and obtain the analog control voltage through digital-to-analog conversion 2) The control voltage directly supplies power to the two-phase winding of the stator of the stepper motor after power amplification, and the feedback control of the stator current is not realized, so that the output torque of the motor at high speed and low speed is inconsistent, and the stator current fluctuates greatly. 3) The two phases of the stepper motor The control system of the phase winding current is realized by analog components. Due to the poor consistency of the analog components, the characteristics of the components are g

Method used

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  • Full-digital subdivision high-accuracy stepper motor controller
  • Full-digital subdivision high-accuracy stepper motor controller
  • Full-digital subdivision high-accuracy stepper motor controller

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[0021] The following describes the present invention in detail with reference to the figures:

[0022] Such as figure 2 As shown, the central processing unit of the stepper motor controller is a microprocessor (17) with high-speed computing capability. In the actual controller, the TMS320MC2407 produced by the American TI company is used. For the functional unit of the chip, it is a step Into the motor controller designed synchronous serial communication interface circuit (8), asynchronous serial communication interface circuit (9). The synchronous serial communication circuit is a 3-wire synchronous communication mode. The three communication lines are clock line (Clock), data input line (Data_In), and data output line (Data_Out). The asynchronous serial communication circuit is a 2-wire asynchronous communication mode, and the two communication lines are the data receiving line (RXD) and the data sending line (TXD). In order to reduce the interference between the upper and lowe...

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Abstract

A full-digital fine-step high-accuracy controller for step motor is composed of single-chip microprocessor as control core, step motor control interface, power amplifier, and serial communication interface to host computer. Its control signal has standard TTL levels. Its highest frequency (1MH2) can be divided by 250, so increasing its control accuracy by 250 times.

Description

technical field [0001] The invention relates to a stepping motor control device, in particular to a control scheme and a realization method of a subdivided, all-digital stepping motor controller. Background technique [0002] Because the structure of the stepper motor is completely different from that of the DC motor and the AC motor, the control method of the stepper motor is also completely different from these two motors. The stepper motor controls the input current of the motor in the form of pulse voltage. The number of input pulses is strictly proportional to the angle of rotation of the stepper motor rotor, and the frequency of the input pulse is proportional to the rotation speed of the stepper motor. Because of the above characteristics of stepper motors, stepper motors are widely used in many precision motion mechanisms to complete the precise position control function of the system. Under the premise that the load does not exceed the rated load of the motor, the ...

Claims

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Application Information

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IPC IPC(8): G05D3/20H02P8/22
Inventor 张建勋安刚李彬王树新刘铁罗
Owner NANKAI UNIV
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