Phase Difference Control System for TR Motor

The authors have developed a translational and rotational motor in one device by ultrasonic drive technology. This motor has two degree of freedom, that is, translational movement and rotational movement (TR motor). Two movements are controlled independently or simultaneously such as screw movement. As the motor is driven by ultrasonic vibration at the resonant frequency, the motor (stator) is designed and optimized by FEM analysis. Based on the analysis of FEM, the authors have developed a TR motor successfully. It shows good controllability in both movements.

Speed Control System Research on Hydraulic Torque Forklift

By researching the characteristics of hydraulic torque forklifts, developed a device which achieved inching function. It can detect position of the handle, using Delta PLC controlled stepper motor driven screw movement, to achieve the control of the engine speed, and modify the control parameters via touch-screen on-site commissioning, to achieve a truck at idle operation, through the manipulation of the handle can Smooth and stable pan, lift or tilt operation, making operation more convenient forklift and reduces the operator's labor intensity, a high value market applications.