High-efficiency Sine Ultrasonics Inverter Power based on HPWM

This paper introduces a sine inversion power source matched for ultrasonic wave power transducer.In view of the characters of the switchs in inverters,such zs high operating frequence,high switch losses and output power,an im-proved control scheme named Hybrid Pulse Width Modulation(HPWM) is put forward,in which 80C196MC is used as the main control chip,the HPWM wave is generated by software and LM5111 is applied as the drive circuit.Moreover,the hardware construction of the power source,the control scheme,the software implementation etc.are analyzed.Experiment verifies that the proposed power source based on HPWM has the perfect performances and application prospects.Adopted a developed HPWM control technology,the invertor used 80C196MC single-chip computer as control key,and it also ana-lyzed constitude of hardware,control pian and software and so on.