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  1. jordon

    Passive Input Current Harmonics Filter - Design & Calcuations

    They are measured values using a power analyzer, phase-locked to the input voltage supply. Active solution cannot be considered, sorry.
  2. jordon

    Passive Input Current Harmonics Filter - Design & Calcuations

    Application: SCR-controlled Battery Charger. Input power: 440 VAC, 60 Hz, 3 ph, 3-wire, 10 KW. Output power: 42.3 VDC, 200 Amps. Input Transformer: 440V pri. Δ, 44V sec. Y, 18-pulse (9-phase). Links shows sketch of application and transformer winding configuration. Link I thought the 18-pulse...
  3. jordon

    voltage sensing of 450 VAC 60 Hz to galvanically isolated ADC

    I'd like some guidance on how to measure 450VAC, 60Hz, and pass this to a low voltage sensing circuit (approx. 3 V going to a high-impedence ADC). The two circuits (450V and sensing) must be galvanically isolated. 1. The brute force approach would be to use a 450:3V transformer. The ADC will...

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