ABB PHARPS03000000 Overspeed Tachometer Module

Alternating Current Amplification of the Speed Controller To adjust the amplification, couple the motor to load and define a set value of 0V. Turn the potentiometer P3 to the right until the oscillation starts, immediately reset the amplification until the oscillation (amplified motor noise because of rotary oscillation of the motor shaft with approx. 200Hz) stops and a tick more.The capacitor C21 is responsible for the tachometer filtering (see Figure 16). When operating the drive with a three-phase tachometers a standard value of 22nF is enough. It allows a very good dynamic controller response.

Integral-Action Component of the Speed Controller 

The capacitor C27 is responsible for the integral-action component of the speed controller (see Figure 17). The standard value of C27 is 220nF. 5.5 Direct Voltage Amplification of the Speed Controller The resistor R71 is intended for modifying the static rigidity (see Figure 17). The rigidity decreases with increasing resistor value. The standard value is 330Ohm. 5.6 Derivative-Action Component in the Tachometer Feedback By inserting a resistor (R80) normally not provided with components and a capacitor (C25), a differential action can be given for special requests to the control of the tachometer feedback.

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