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  • Combing GDTs and MOVs for Surge Protection of AC Power Lines (.pdf)
    reference is IEEE C62.41-1991 entitled "IEEE Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits" (formerly IEEE Standard 587).This standard defines the open circuit voltage and short circuit current waveforms which can be expected to occur on AC power lines of 1000 Volts (RMS
  • AN1162 - Sensorless Field Oriented Control (FOC) of an AC Induction Motor (ACIM)
    AN1162 Sensorless Field Oriented Control (FOC) of an AC Induction Motor (ACIM) operate at a speed that is roughly proportional to the Author: Mihai Cheles input frequency. As you decrease the frequency of the Microchip Technology Inc. drive voltage, you also need to decrease the amplitude Co-Author
  • Offline UPS Reference Design Using the dsPIC DSC (.pdf)
    (steps up the DC battery voltage to a constant high-voltage DC) 2)Full-Bridge Inverter (converts DC voltage to a sinusoidal AC output) 3)Flyback Switch Mode Charger (current source and charges battery with constant current)
  • Data Line Protectors (.pdf)
    In many office and industrial locations, data lines (such as RS-232 and ethernet) and AC power lines run in close proximity to each other, which often results in voltage spikes being induced onto the data line, causing damage to sensitive equipment. Protection Requirements Data lines should
  • Principles of lock-in detection and the state of the art
    of accurately measuring a signal in the presence of noise up to a million times higher in amplitude than the signal of interest. Over decades of development, researchers have found many different ways to use lock-in amplifiers. Most prominently they are used as precision AC voltage and AC phase meters

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