How to measure electrical frequency?

In summary, to convert a frequency to a voltage, an electronic frequency is needed. Different types of transducers can be used to obtain an electronic frequency from a mechanical one. National's LM2917 chip is specifically designed for this application and can be found on their website. A magnetic pick up is used as the transducer. There are different components involved in the conversion process, such as a generator, transformer, schmitt's trigger, and PLC, before reaching the LM2917 chip. The LM2917 chip only detects positive peaks of a sinusoidal wave.
  • #1
killjoy_scofiel
6
0
in f to V converter, input is frequencies . Is that electrical or Mechanical frequency?
 
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  • #2
To convert a frequency to a voltage, you need an electronic frequency (voltage varying in time).
One can use different types of transducers to get an electronic frequency from a mechanical one.
National makes a chip, LM2917, just for this application. Check out http://www.national.com/mpf/LM/LM2917.html" where you can see the transducer (magnetic pick up).
 
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  • #3
sensor transduces electrical frequencies?
how to convert this frequency to mechanical frequency(RPM),,,
i ve seen a design before, they use scmitt's trigger before f to V converter

generator--->trafo---->scmitt's---->LM2917---->PLC---->inTouchwonderware

i think schmitts don't sense the frequency...(no magnetic pick up)?

LM2917 only detect positive peak of sinusoidal wave?
http://www.imagehosting.com/out.php/i1447796_all.jpg
 
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1. What is electrical frequency?

Electrical frequency refers to the number of cycles or oscillations of an alternating current (AC) per second. It is measured in Hertz (Hz) and is a crucial factor in determining the performance and functionality of electrical systems and devices.

2. How is electrical frequency measured?

Electrical frequency is typically measured using an oscilloscope, which displays the waveform of an AC signal. The frequency can be calculated by counting the number of cycles within a specific time interval (usually one second) and dividing it by the time interval.

3. What factors affect electrical frequency?

The electrical frequency of an AC signal can be affected by various factors such as the power source, the design of the circuit, and the type of load connected to the circuit. Changes in these factors can result in fluctuations in the frequency of the signal.

4. Why is it important to measure electrical frequency?

Measuring electrical frequency is crucial in ensuring the proper functioning and safety of electrical systems and devices. It helps identify any irregularities or fluctuations in the frequency, which can indicate potential issues or malfunctions. Additionally, some devices and equipment may require a specific frequency to function correctly, so measuring it ensures optimal performance.

5. Can electrical frequency be changed?

Yes, electrical frequency can be changed using a device called a frequency converter. This device can convert the frequency of an AC signal to a different frequency, allowing it to be used with devices that require a different frequency. However, it is essential to note that changing the frequency may also affect the performance and functionality of certain devices.

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