Efficiency Measurements of Ultrasonic Generator for Welding
W. Kardyƛ and A. Milewski
Tele and Radio Research Institute, Ratuszowa 11, 03-450 Warsaw, Poland
Received: March 18, 2015
Full Text PDF
The paper presents results of theoretical analysis as well as practical measurements of efficiency in ultrasonic welding system with main focus on ultrasonic generator. Through analysis and tests were performed using 3 kW 20 kHz Sonic Blaster ultrasonic generator manufactured by ITR. Special equipment was used to perform accurate measurements of input and output power of such generator since an output signal of the ultrasonic generator has high voltage amplitude up to 3 kV and frequency of 20 kHz. Artificial load able to dissipate up to 6 kW of continuous power was designed to simulate ultrasonic transducer. Power measurements were performed on the mains supply of the generator using accurate true RMS power meter and load side measurements were performed using specially built power metering system able to measure high voltage 20 kHz signals based on calibrated high voltage resistive divider and high frequency current transducer.

DOI: 10.12693/APhysPolA.128.456
PACS numbers: 81.20.Vj, 43.35.-c, 43.35.+d, 77.65.Dq, 77.84.Cg, 85.50.-n