Many scholars and research institutions at home and abroad have conducted research on dynamic coil linear motors, but most of the research has focused on optimizing the structure and materials of permanent magnets, the overall structure of motors, and the design of control circuits and chips that combine efficient control strategies. However, there is still limited research on its power to work ratio and the time delay from start-up to steady state. This article provides an in-depth exploration of this aspect.
The moving coil linear motor can continuously and proportionally convert the external input voltage signal into linear displacement of reciprocating linear motion, and can generate electromagnetic force about 2.5 times that of structures of the same size. It has been widely studied for its high linearity and small hysteresis characteristics. However, traditional single coil coil components are prone to generating eddy currents inside the magnetic material during movement, which reduces the electromagnetic force generated by the coil. Due to the inherent impedance characteristics of coil components, there are certain limitations in both response time and response speed. Developing dynamic coil linear motors with high output electromagnetic force and high response is the development trend in the field of electrical engineering.
To this end, a novel bidirectional reversible control dynamic coil linear motor is proposed in the article, which adopts a new coil segmentation and series parallel transformation combination method for its current carrying coil. By changing the resistance and time constant to improve the loading response time at both ends of the coil, the PWM pulse width modulation control method is used to control the magnitude and direction of the coil current. This not only achieves stable and disturbance free motor conversion control, but also realizes the device's large electromagnetic force output and high-frequency response characteristics.
