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  • Transformer Design for Charging Defibrillator Capacitors
    transformer design phase for charging a capacitor in a stated time. The procedure presented eliminates "cut and try" or over-design approaches. Selection of critical values can be made with confidence using the guidance provided. First a little background in flyback topology. Flyback topology has
  • Transformer Basics (.pdf)
    There is more than meets the eye in the insulation employed in transformers. Among the. design and construction considerations are temperature and voltage ratings. To those unfamiliar with transformer manufacturing, terms such as fish, kraft, natural fiber and gum might sound like the main
  • Comparative Test of Low Voltage Lighting Transformers
    Landscape Lighting transformers differ greatly in design, construction and performance. To demonstrate the importance of these differences, a team of electrical engineers were asked to compare two transformers that are commonly used in Landscape Lighting installations. The transformers used
  • Design and Development of Medical Electronic Instrumentation
    for. compliance with safety standards. Projects include the design of an isolated biopotential. amplifier, transformer-coupled analog isolator module, carrier-based optically coupled analog. isolator, linear optically coupled analog isolator with compensation, isolated eight-channel. 12-bit analog
  • Switching power supply design rules
    in a full-resonant converter. When the main switch, Q1, turns on, about a half cycle of current flows through the switch, transferring the energy from the input source to an LC circuit composed of Lr and Cr. The transformer here provides voltage scaling, electrical isolation from primary to secondary
  • Basic Output Generator Excitation and Demodulation Requirements for USD Gyroscopes
    variations of this basic variable transformer design used in various gyroscope designs. All transformer based pickoffs however, operate in the same fundamental manner. As in all typical transformers, AC voltage, or excitation, is supplied to the pickoff transformer primary winding. From the secondary
  • The case for custom transformers
    a single voltage. So equipment that needs multiple voltages may end up with many power cabinets as are visible atop this equipment enclosure. One custom-designed combination transformer in a single cabinet now takes over all the duties of the original transformers. A new custom transformer
  • Circuit Ideas: High-efficiency dc/dc conversion
    magnetism to go to zero during the time available. Reset time is that during which the transformer voltage is not being controlled by the primary switch or the active forward rectifier in the secondary. There are two inductances of concern for efficiency considerations: the primary inductance L
  • High Speed and Safety Reinforced Digital Isolator for Endoscope and Medical Imaging Applications
    isolation so the sensor won't shock the. patient. The combination of high speed and stringent safety requirements. presents signifi cant challenges to isolation. design and often resulted in expensive solution, e.g. fi ber optics. With latest transformer on fl ex technology. developed by Avago
  • Common-Mode Filters For DC/DC Converters
    Switching noise generated from a DC/DC converter appears at both the input and output terminals. The parasitic capacitance of the power transformer, printed circuit board (PCB) and case will couple voltage 'spikes” between input and output. The spike generator in a DC/DC converter can be identified
  • Harmonics and Harmonic Mitigating Transformers (HMTs): FAQs
    and how does it generate harmonics? 5. Can't equipment manufacturers design their products to be free of harmonics? 6. What problems do non-linear loads and harmonics create? 7. Why do 3rd harmonic currents overload neutral conductors? 8. How do non-linear loads create current and voltage harmonics?
  • Improve Plant Production by Addressing 24VDC Switch-Mode Power Supply Issues
    transformer-based power supply, a current overload will cause a gradual drop in voltage output (P=U x I). For example, at two times nominal current, the power supply will provide only half the normal voltage (See Figure 1). A voltage drop may disable control components powered by the supply, which

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