Research on novel matching topology and characteristics of rotary ultrasonic machining system with inductive contactless power transmitter

Abstract

The rotary ultrasonic vibration machining is of great advantage in the precision and high efficient machining for hard to machine materials，and is being increasingly applied. In the rotary ultrasonic vibration machining system with inductive contactless power transmitter (ICPT), the inductance of ICPT and its impedance matching with the ultrasonic generator have a great influence on the output power and the efficiency of the system. A new matching topology with C-C double matching capacitance series-parallel on the primary side of transmitter is proposed in this paper. Based on the theoretical analysis, the model of the bilateral resonance of a rotating ultrasonic vibration machining system with C-C double matching capacitance series-parallel matching topology is established, and the matching capacitance calculation method are proposed. The experimental results show that the system can achieve an ideal bilateral resonance after being matched with the calculated C-C double-matching capacitance. The power transmission and load characteristics of the new system have been further studied theoretically and experimentally. It is concluded from the study that the transmission and load characteristics of the system changes with the self-inductance and mutual inductance of the inductive contactless power transmitter under the condition of bilateral resonance. When the self-inductance of primary side is of the same value with that of the secondary side, the system exhibits the excellent comprehensive transmission performance. The results are of great significance to the optimization and engineering application of the rotary ultrasonic vibration machining system.