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  • Using AC PWM Drives on Non-Standard Voltages and Frequencies
    Often, there may arise the need to apply an AC PWM drive1 to input voltages such as 200, 208, 380, 415 and possibly other levels, as well as input frequencies such as 50 Hz. The AC PWM regulator utilizes a switching power supply for control power that is sourced from a DC bus. This gives the unit
  • Implementing Arc Detection in Solar Applications: Achieving Compliance with the new UL 1699B Standard
    of installations today. utilize long runs of high-voltage DC power that. have raised concerns over safety issues relating. to power arcs. This has led to the drafting of the. UL 1699B standard that requires the use of arc. detection in high-voltage systems to increase. personal safety, protect equipment
  • Inverter Buying Guide
    A power inverter is a device that converts low-voltage DC (direct current) power to standard household AC (alternating current) power. An Inverter allows you to operate household appliances and electrical equipment using the power produced by a car, truck or boat battery or renewable energy sources
  • Electrical Considerations of Fan Cooling
    . The standard fan supplied with the amplifiers is a 12V brushless DC motor fan. Like all switching circuits the brushless motor commutation generates electrical noise. If care is not taken in how the fan is connected to the amplifier circuit some of that electrical noise may appear at the output
  • Design and Development of Medical Electronic Instrumentation
    for dc-correct signal acquisition. through a sound card, as well as fast Fourier transform and high-resolution spectral estimation. software. In Chapter 6 we discuss the need for artificial signal sources in medical equipment. design and testing. The chapter covers the basics of digital signal synthesis

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