AC analaog current transducer - CR Magnetics

[APDahlen]

Hello @sureshkumar.m,

The CR4100 dataheet does not mention high frequency and VFD use. Instead:

these devices are ideal in chopped wave and phase fired control systems.

This is a relatively low frequency operation associated with thyristors (SCRs) where the current for parts of a 60 Hz signal is measured.

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Instead, you may be interested in this sensor as the datasheet does specify VFD operation.

APR 400 B420L | DigiKey Electronics

Related thoughts:

• The motor will generally look like an inductor. This will tend to smooth out the VFD’s pulsation.

• We can use a high current sensor to measure a smaller current by passing the wire through the senser aperture multiple times as described in this article:

Measure high DC current with an Arduino and the LEM HO 120-P Transducer

What techniques are available to measure high current with an Arduino microcontroller? There are several different ways to measure current using a microcontroller such as the Arduino Nano Every. These methods generally fall into two categories: shared ground connection: With these methods the microcontroller must be at the same ground potential as the system being measured. The classic example is to pass the current through a low resistance shunt resistor. With the microcontroller’s ground an…

Please let us know if you would like to continue exploring your application.

Best wishes,

APDahlen