DEVELOPMENT OF A MICRODRIVE MODEL FOR A BIOMEDICAL ELECTRONIC PIPETTE BASED ON A CORELESS MOTOR

Abstract

A regulated medical pipette with electronic control is an essential and indispensable modern device. The study analyzes the importance of using electronically regulated medical pipettes in medical and related fields. Modern approaches to developing their microelectromechanical actuator are outlined. To improve the design and control system of the electronic medical pipette, it is necessary to develop an appropriate mathematical model, which requires motor parameters that are often missing from manufacturer descriptions. At the first stage, a model for a coreless motor of the 610 series (6 mm diameter, 10 mm length) was developed using the specialized design and simulation software JMAG Designer for a supply voltage of 3.0 - 3.7V, followed by its analysis. Using the JMAG Designer model, some necessary parameters of the coreless motor were determined. At the second stage, an algorithm was developed, and a series of experimental studies of the 610-series coreless motor was conducted to obtain all necessary parameters for the further development of a high-precision model. Based on the experimental results, a transfer function was obtained, and a high-precision MATLAB model of the coreless motor was developed. The corresponding transient processes of current and speed were obtained, confirming the accuracy of the model. The transient current response in the model at a supply voltage of 3.7V matched the operating point with an error of 8.1%, while the motor's rotational speed had an error of 5.7%. A simulation model of an electric microdrive based on a coreless motor for a regulated electronic medical pipette was developed and its operation was analyzed.