Drive circuit by utilizing STM32 chip to control peristaltic pump stepping motor

Abstract

The invention discloses a drive circuit by utilizing an STM32 chip to control a peristaltic pump stepping motor. The drive circuit comprises the STM32 chip, a motor, a THB6128 chip circuit, three isolation circuits, a current mode setting circuit, an attenuation mode setting circuit and a subdivision setting circuit. The three isolation circuits 1,2,3 send an enable signal, a direction signal and a speed signal of the STM32 chip to the THB6128 chip circuit after the signals are subjected to photoelectric coupling isolation; the current mode setting circuit, the attenuation mode setting circuit and the subdivision setting circuit are used for setting parameters of the THB6128 chip circuit; the THB6128 chip circuit is used for receiving the enable signal, the direction signal and the speed signal sent by the three isolation circuits 1,2,3, and setting parameters thereof through the current mode setting circuit, the attenuation mode setting circuit and the subdivision setting circuit; and a THB6128 chip output a voltage signal for controlling work state of the motor. The STM32 chip controls the THB6128 chip to drive the peristaltic pump stepping motor to work, so that stability and precision of the peristaltic pump stepping motor can be improved.

Description

Technical field [0001] The invention relates to a drive circuit for controlling a stepper motor of a peristaltic pump with an STM32 chip. Background technique [0002] At present, the research of peristaltic pump control technology has made great progress. As the best chip for driving the peristaltic stepper motor, STM32 has a wide range of applications. Its main function is to achieve efficient control of the separate transportation and metering of fluids in microbial experiments. However, due to the small output current of the STM32 chip, it is impossible to directly drive the peristaltic pump stepper motor. At present, the more common STM32 chip controls the A4988 chip to drive the peristaltic pump stepper motor. However, the A4988 chip circuit has poor driving ability and lags in response. , The performance is unstable, the control precision is low and other shortcomings. Therefore, there is an urgent need for a circuit that can control the stability and accuracy of the step...

Images