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  • Users: mriechert
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  1. mriechert

    Rectifying 115V AC @ 400Hz

    Hello all; I have just had a discussion with a collegue about rectfiying 115V AC @ 400Hz. The question came up if we can use a power supply rated for 115V AC @60Hz to rectify 115V AC @ 400Hz. At first I thought you could since after the bridge diode rectifer the voltage would be DC and so...
  2. mriechert

    OP AMP CMRR Measurement?

    Hello all, I am on a quest to understand the specifications for op-amps more clearly. On this quest I am trying to measure the common mode rejection ration for a 741 op amp. But I am at a bit of a loss how to measure considering the measurement needs to be very precise. I have tried one...
  3. mriechert

    power factor, inductive or capacitive??

    Hello Why is a capacitive power factor undesirable? I am currently working on a project and have managed to build a controller that corrects the power factor by generating a greater or lesser inductance on the system. The system load is inductive but a fixed capacitor is used to make the...
  4. mriechert

    Measuring Dielectric Losses

    Hello, I have been reading up on Dielectric losses and came across the following definiton: "Under AC conditions dielectric losses arise mainly from the movement of free charge carriers (electrons or ions), space charge polarisation and dipole orientation. Ionic, space charge and dipole...
  5. mriechert

    hi-pot testing versus megger insulation testing

    I am looking into the advantages of doing an AC-Hipot test versus doing a megger (I think it is otherwise known as DC-Hipot test) on electronic equipment. I am trying to get information together so that I can write a report but I am having trouble trying to compare the two tests. I have...

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