Metodyka pomiarowa i urz�dzenia do badania up�ywno�ci kabli i przewod�w elektroenergetycznych stosowanych w podziemnych sieciach g�rniczych

Chudorliński, J.; Michalski, Paweł; Prystupiuk, P.; Przybysz, Radosław; Wlazło, Paweł

doi:10.15199/ele-2014-074

Cited by 2 publications

(2 citation statements)

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“…Figure 1 presents a simplied schematic of the device [4]. This schematic does not include digital control circuits, user interface, communication interfaces and other supplementary circuits integrated in the DSP * corresponding author; e-mail: witold.kardys@itr.org.pl control unit as well as transistors driver circuits and protection circuits.…”

Section: Theoretical Losses Analysismentioning

confidence: 99%

Efficiency Measurements of Ultrasonic Generator for Welding

Kardyś

Milewski

2015

Acta Phys. Pol. A

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The paper presents results of theoretical analysis as well as practical measurements of eciency 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. Articial 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.

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Section: Theoretical Losses Analysismentioning

confidence: 99%

Efficiency Measurements of Ultrasonic Generator for Welding

Kardyś

Milewski

2015

Acta Phys. Pol. A

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“…Output waveform of ultrasonic generator is sinusoidal and output frequency of particular generator is variable in narrow range. Narrow frequency band and sinusoidal output voltage allow the use of a resonant converter [3]. Such a solution eliminates commutation losses in power switching transistor, hence has better eciency compared to other converter designs.…”

Section: Generator Power Stagementioning

confidence: 99%

Universal Ultrasonic Generator for Welding

et al. 2013

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The paper presents design and parameters of a multifunction ultrasonic generator manufactured by Tele and Radio Research Institute. Ecient usage of ultrasonic welding and cutting technology depends on the ability to precisely control process parameters and tune those parameters to suit particular needs. Ultrasonic generator is responsible for such control and tuning. Presented design incorporates powerful 32 bit Cortex M4 microcontroller with oating point unit which allows using modern signal processing methods to calculate parameters of ultrasonic stack in real time. Calculated parameters, especially impedance of the stack are used to estimate load level and identify phases of the welding process such as melting of the welded material. Precise control of the output signal is possible due to innovative design of the direct digital signal synthesis unit implemented in programmable logic device (CPLD). Resonant inverter topology of the generator front end ensures high electrical eciency of the device. Designed generator is equipped with various communication interfaces such as USB host and slave, Ethernet, Bluetooth, CAN and RS485. Multiple digital inputs and outputs together with load cell interface, 420 mA receiver and 010 V analog input enable the generator to monitor and control entire ultrasonic welding system without the need of a PLC unit.

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Metodyka pomiarowa i urz�dzenia do badania up�ywno�ci kabli i przewod�w elektroenergetycznych stosowanych w podziemnych sieciach g�rniczych

Cited by 2 publications

References 0 publications

Efficiency Measurements of Ultrasonic Generator for Welding

Efficiency Measurements of Ultrasonic Generator for Welding

Universal Ultrasonic Generator for Welding

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