Stepper motor drive device based on CAN bus

Abstract

The invention discloses a stepper motor drive device based on a CAN bus. The stepper motor drive device comprises a central processing unit, a chopped wave constant current drive circuit, a drive control circuit and a current detection circuit, wherein the central processing unit is connected with a CAN bus interface circuit, an LED indicating circuit, an AD conversion circuit and a keyboard scanning circuit; the chopped wave constant current drive circuit is communicated with a central processor; the output of the chopped wave constant current drive circuit is connected with the drive control circuit of a stepper motor; the input of the drive control circuit is communicated with the central processor and receives an output signal of the chopped wave constant current drive circuit; the output of the drive control circuit is connected with a two-phase stepper motor; the current detection circuit receives the output signal of the drive control circuit and outputs the output signal to the chopped wave constant current drive circuit; and the output end of the current detection circuit is respectively connected with the central processor and the drive control circuit. The stepper motordrive device has the characteristics of realizing no declining of output torque along with the rise of rotational speed and having high resolution and wide application range and also has the advantages of low cost, strong antijamming capacity, abundant selectable resource and good technology and competitiveness.

Description

technical field [0001] The invention relates to the application technology of a stepping motor system in a digital control system, in particular to a stepping motor driving device based on CAN bus. Background technique [0002] With the wide application of stepper motor systems in various digital control systems, the requirements of various digital control systems are getting higher and higher with the performance and service conditions of stepper motors. This requires continuous development of high-performance, high-reliability, high-integration, low-cost drivers to meet the needs. As we all know, domestic research on this aspect has been very active, but there are few high-performance stepping motor drivers available for selection, and domestic drivers basically have large volume, irregular dimensions, unstable performance indicators and It is far from achieving serialization and other problems, which brings great inconvenience to the selection and installation of the dri...

AI Technical Summary

Problems solved by technology

[0007] The inherent resolution of the stepper motor is not high, and it cannot be precisely displaced

Taking the most widely used 8-pole 50-tooth two-phase hybrid stepping motor as an example, its step angle is 0.9° / 1.8°, and it needs to cooperate with a mechanical deceleration mechanism to achieve the required pulse equivalent accuracy. However, the increase in the mechanical system It also introduces a source of error

[0008] Oscillation and overshoot problems of stepper motors at low frequency operation severely limit the application range of stepper motors

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