ISO102 and OPA27 schematic configuration measuring DC current 500VDV


Posted on Mar 28, 2007

As shown in FIG constituted by ISO102 OPA27 500VDV DC current measurement circuit. Circuit between + 500V DC voltage source and the sampling resistor in series with a DC motor,


ISO102 and OPA27 schematic configuration measuring DC current 500VDV
Click here to download the full size of the above Circuit.

the voltage drop across the resistor is detected sampling to detect changes in the motor current, the voltage input to the op amp sample OPA27 amplification, and then later by the IS0102 isolation amplifier output. The characteristics of the circuit is the use of isolation amplifiers, the noise of the big motor circuits with low voltage circuit isolation, avoiding the big noise of electric circuits strong electric circuit interference. Offset voltage regulation, cf. the gain adjustment potentiometer.




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