A Stepping Motor Subdivision Drive Device with Current Vector Constant Amplitude Control

Abstract

The invention discloses a stepping motor subdivision driving device with current vector constant amplitude control, which comprises an RS232 interface circuit, an optocoupler isolation circuit, an LED indication circuit, a voltage and current protection circuit, a subdivision driving power supply circuit, a main control unit, a power The drive circuit, two-phase stepper motor and current detection and conditioning circuit, the RS232 interface circuit, optocoupler isolation circuit, LED indicator circuit, voltage and current protection circuit, subdivision drive power supply circuit and current detection and conditioning circuit are respectively connected with the main control unit connection; the main control unit, the power drive circuit are connected to the two-phase stepping motor in sequence, and the power drive circuit is connected to the current detection and conditioning circuit in sequence. The current vector constant-amplitude control stepping motor subdivision drive device of the present invention can overcome the defects of poor adjustability, low control precision, low reliability and poor repeatability in the prior art, so as to achieve good adjustability and control The advantages of high precision, high reliability and good repeatability.

Description

technical field [0001] The invention relates to the technical field of stepping motors, in particular to a subdivision driving device of a stepping motor with current vector constant amplitude control. Background technique [0002] Stepper motor is a special motor used for control. It is an electrical transmission device that converts digital quantities into angular displacement. Its operation is synchronized with control pulses. The step error does not accumulate for a long time. It can be composed of a relatively simple structure and has a certain The precision open-loop control system can also form a closed-loop control system when higher precision is required. Due to the advantages of high-precision positioning control, simple position and speed control, and no accumulation of step errors, stepper motors are widely used in low-load, low-speed industrial control. It is widely used in CNC machine tools, automated production lines, industrial instrumentation, computer equi...

AI Technical Summary

Problems solved by technology

[0009] However, the single-chip microcomputer is limited by the calculation speed and precision. When subdivision control is used, the number of subdivisions cannot be very high, the noise is large at low frequencies, the motor is easy to shake, and the temperature rise is also large under normal operation.

In addition, in order to make up for the disadvantage of single-chip computing speed, the regulator composed of analog comparison unit is usually used. Once the parameters are set, it is not easy to adjust frequently, and the adaptability to changes in working conditions and objects is poor; and it is difficult to simulate the main control unit. To achieve advanced control strategies and control methods, the detection accuracy is not high, and the control accuracy is poor; the control circuit composed of analog devices is not highly integrated, the hardware design is complicated, the reliability is low, and the repeatability is poor.

[0010] In the process of realizing the present invention, the inventor found that there are at least defects such as poor adjustability, low control precision, low reliability and poor repeatability in the prior art

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