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  1. I

    Odd voltage reading from digital volt meter

    Sorry, but I don't have a diagram or photo of this setup. I designed a circuit that interfaces into the alternator to collapse the magnetic field of the system. It seems to have worked, just odd output results. I used a short circuit as a load to provide a high counter torque on the alternator...
  2. I

    Odd voltage reading from digital volt meter

    The source per phase winding had a resistance of 0.7ohm. I tried to get a current reading with a clamp meter and it was showing zero amps. I thought the value of voltage across the load was current x resistance. I tried to measure the load voltage many times with different multimeters and they...
  3. I

    Odd voltage reading from digital volt meter

    The resistance of the load is less than 0.0003 ohm. The voltage across the load is in excess of 100 volts. There is regulation for the field, it is supplied by a separate DC source.
  4. I

    Odd voltage reading from digital volt meter

    I tested all the meters and the DC and AC voltage measurements are correct with the appropriate supply. The load I am using is basically a short circuit, It drops 99.95% of the power across the load. The frequency remains stable at 240Hz with no fluctuation.
  5. I

    Odd voltage reading from digital volt meter

    I had the volt meter set to AC volts.
  6. I

    Odd voltage reading from digital volt meter

    I have a three phase alternator and I used a digital voltage meter across the output terminal and the reading went from OL to 4000 volts to 3000 volts and quickly decreased to zero volts, then went through the range again starting from OL. It continued to do this, I thought the meter could have...
  7. I

    Series lc circuit and clamp-on ammeter

    The capacitance in the circuit is 500uF, the inductance of the circuit including the wires is 810.56uH and the resonant frequency is 250Hz. I measured the inductance of the wire to be 13.5uH with a MTP MS5300 inductance meter. The clamp meter I am using is good for frequency from 50Hz to 500Hz...
  8. I

    Series lc circuit and clamp-on ammeter

    When calculating the capacitance for the circuit I did include the inductance of the wire. The resonate frequency is less than a kilohertz. I measured the circuit inductance with and inductance meter and the value dropped below the inductance of a single wire. I just wanted to be sure because...
  9. I

    Series lc circuit and clamp-on ammeter

    In a series LC resonant circuit the capacitor acts to cancel out the inductance of the the circuit. With no inductance in the circuit the magnetic field will collapse. So my question is, with this collapse of the magnetic field will it be be harder to measure the current in the circuit with a...
  10. I

    Calculation for power factor

    I'm trying to calculate the power factor of a three phase synchronous generator torque angle = arctan^-1 (impedance) (sin torque angle/ current x voltage) 90 - torque angle - sin = XYZ power factor is cosine XYZ Is this the correct calculation to use?
  11. I

    Counter torque, voltage and current

    is counter torque affected by voltage and current phase shift?
  12. I

    Counter torque, voltage and current

    When an ac generator produces high current the counter torque increases, but if voltage increases would the counter torque decrease? Is counter torque related to counter EMF?
  13. I

    Magnetic field coupling

    Can a weak alternating magnetic field from one coil have an effect on another coil that has a stronger alternating magnetic field? I ask this because I want to know if magnetic fields follow the same principal as coupling two different voltages together.
  14. I

    Torque angle and power factor of generator

    I need someone to clarify for me how an increase in torque angle in an ac generator increases the power factor. Does the torque from the rotor force the current in phase with the voltage on the stator.
  15. I

    Question on power plant generators

    Sorry but I'm more interested in the electrical side of it and less on the actual mechanical side of the operation. I have been trying to find info in the internet but so far not successful.
  16. I

    Question on power plant generators

    I'm trying to understand exactly how power plant generators increase power output. So I will explain what I think is right. To increase the power output of a generator more torque from the prime mover is required to increase the torque angle between the voltage impressed on the stator from...
  17. I

    Load angle of generator

    Is there a mathematical equation for calculating the load angle of a generator? I'm trying to calculate the real and reactive power of the generator which the equation I am using is EV/Xd sin delta where E is the generator excitation voltage V is the generator terminal voltage Xd is the...
  18. I

    Power plant generators

    Do power plant generators regulate the output voltage the same way a car alternator regulates its output voltage. Or do power plant regulators control the output by regulating the rotation speed of the generator.
  19. I

    Power plant transformers

    When it comes to power plant transformers, What is the typical inductance and impedance on the primary winding?
  20. I

    Voltage doubler and low load values

    The transformer does not have a current rating on it but with the secondary winding connected in series with the 3 ohm resistor the voltage from the secondary is 17.66 volts AC at 0.385 amps AC. What size of capacitor would I need to make this circuit work properly with a transformer that can...
  21. I

    Voltage doubler and low load values

    The transformer voltage is 19 volts AC. On the output through the 3 ohm resistor the DC voltage from a bridge rectifier is 3.5 volts. From the voltage doubler it is 2 volts. Just so that I understand with lower frequencies on the input to the voltage doubler the capacitor takes longer to...
  22. I

    Voltage doubler and low load values

    The source I am using is 60 Hz AC power from a transformer. I have been using a Delon voltage doubler with 2200 Micro Farad capacitors. With the load being 3 ohms the voltage is half that of a bridge rectifier.
  23. I

    Voltage doubler and low load values

    How can I double the voltage through a 3 ohm load with a voltage doubler when the output voltage usually collapses due to low load resistances. I have a feeling it is due to capacitance values and frequency. Can someone please explain.
  24. I

    Current through voltage doublers

    When it comes to voltage doubler circuits, They produce double the output voltage but half the current. But when a voltage doubler output is put through a resistive load, the current through that load is equal to voltage divided by resistance. So how does the voltage doubler provide half of the...
  25. I

    Changing voltmeter resistor value

    Thanks for all the input, i do appreciate it. I don't have a variable DC voltage supply to compare the two voltages, I am limited in my electrical supplies. I do like the idea with using the current meter with the resistor to measure voltage since current x resistance equals voltage. And the...
  26. I

    Changing voltmeter resistor value

    I know there are voltmeters out there with really high internal resistance for measuring voltages with more accuracy. The problem is they are very expensive. The meter I am using, i believe only has one setting. It only has one setting for DC volts and one for AC volts. When i connect it to the...
  27. I

    Changing voltmeter resistor value

    I am try to measure the voltage from a high impedance source with a regular voltmeter with an input impedance of 10 mega ohm. But the voltage being measured is inaccurate. Is it possible to change the resistor value inside the voltmeter to 100 mega ohms to get a more accurate reading?
  28. I

    Voltmeter measurement error

    What is the best way to measure the voltage from a high resistance circuit? The circuit resistance is higher than the resistance of the voltmeter.
  29. I

    Correcting Voltage Drop by Adding Resistor L Pad

    I have a source of 800 Kilo Ohms and I want to power an LED with that source. Which I would presume the LED would have a resistance of 9.5 to 10 Ohms if I'm correct. When I connect the LED to the source the voltage drops from 12 volts DC to around 1 volts DC. If my thinking is correct the reason...
  30. I

    Earth batteries and different materials

    Would titanium and copper make a better Earth battery than iron and copper? What will the voltage and current difference be between the two?
  31. I

    Charging 10 1F Capacitors: Output Voltage and Capacitance?

    Can you tell me if I'm right with this. If you charge ten 1F capacitors in series at 10 volts. Each capacitor has a voltage of 1 volt and a charged capacitance of 0.1F. So if you discharged the ten capacitors in parallel the output would be equal to 1F of capacitance charge and 1 volt. or would...
  32. I

    Transformer impedance match

    So how do you step up voltage with an audio transformer. wouldn't you have to have a larger impedance on the secondary winding compared to the primary.
  33. I

    Transformer impedance match

    So if I get this right, if I have a source impedance of 40K and a load of 50. I need a turn ratio of 1:28.28 to get the same power from the source to the load. So if I have 10 volts in from the source I would have 10 volts out. Is this right?
  34. I

    Transformer impedance match

    I have a question about impedance matching with transformers. If I have a source impedance of 20 K ohms, to step up the voltage does the primary have to match 20K ohms with a secondary of 40K ohms for a step up of 1:2. Or can I change it so the primary is 50 Ohms with a secondary of 40K ohms...
  35. I

    Question on transformers in parallel

    My question is if you connect multiple transformers together with the secondaries in parallel, how do you calculate the sum current from the transformers. Is the current calculated by dividing the voltage on the secondary winding by the impedance of the secondary windings. Or is it based on the...
  36. I

    Question on audio transformer

    So if I connected the primary winding to a signal generator, there should be a signal on the secondary winding.
  37. I

    Question on audio transformer

    Will an audio transformer pass multiple signals at the same time to the secondary winding. For example if there is 200Hz 300Hz and 1000Hz on the primary winding, will there be 200Hz 300Hz and 1000 Hz on the secondary. In my opinion it will but I just wanted to confirm this.
  38. I

    Combining AC Signals Through an Inductor/Resistor Network

    The signals are sine waves at 2 volts and 60 Hz.
  39. I

    Combining AC Signals Through an Inductor/Resistor Network

    So can inductors and resistors in series align the phases of two AC signals so they add voltages.
  40. I

    Combining AC Signals Through an Inductor/Resistor Network

    Is it possible to combine two AC signals that are slightly out of phase, but have the same frequency, voltage and current through an inductor, resistor series network.
  41. I

    RL bandpass filter

    The frequency I am trying to filter is 60Hz, My meter can read to 1 MHz. The meter measures the signal voltage and it gradually rises, but with the components I used I should have a higher current through the output. The calculations show an output current of 1.7 amps but I don't get any output...
  42. I

    RL bandpass filter

    I'm a bit confused here. To measure the output voltage, frequency and current I have to use an oscilloscope. Why won't a multimeter measure the signals voltage, frequency, and current properly.
  43. I

    RL bandpass filter

    I calculated a transfer function of .002. I measured the signal by having two different multi meters, one for ground and one for output. The voltage gradually increased, but I didn't get any current amplification.
  44. I

    RL bandpass filter

    Does an RL low pass and high pass filter need to have the same impedance in the circuit as to the source impedance to work properly. I put an inductor in series with the source with a resistor to ground as the low pass, and a resistor in series with the source with an inductor to ground as a...
  45. I

    Series radio tuner

    How do you connect a variable capacitor to an inductor to make a series radio tuner? And where do you tap the resonant frequency to send to the RF amplifier?
  46. I

    Troubleshooting Series LC Filter: No Resonance, Voltage Gain, or Current Output

    I'm having problems filtering out certain frequencies from others with a series LC filter. I have a 1.923 Henry DC filter choke inductor set in series with a 0.1 micro Farad capacitor. I send the signal through the inductor to the capacitor and output from the other side of the capacitor. I'm...
  47. I

    Caps and resonators

    Tell me if I'm wrong with this , But I thought that if you had a supply current of 1 amp then a 1 Farad cap would work. And if you had a supply current of 3.3 micro amps a 3.3 micro Farad cap would work.
  48. I

    Caps and resonators

    For a low current application would a ceramic capacitor work better.
  49. I

    Caps and resonators

    For a series LC circuit, can a bipolar electrolytic capacitor be used. Also how do you tap the resonant frequency from a series LC circuit.
  50. I

    Problem with Q calculations

    For a series LC circuit the Q I believe is Q= 1/R^(L/C). I have a 1.923 Henry inductor and a 4.4uF cap. The resistance in the inductor is 52.5 ohms. The answer I got was 111.86. I know the circuit can't have a Q of that value. Where did I go wrong?
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