Table 1 shows applications for PID control.

Table 1. PID Control Applications

Application

Control Content

Sensors Used

Speed Control

  • The drive uses a feedback signal for the machine speed, and adjusts that speed to align with the target value.

  • The drive uses speed data from other machinery as the target value to do synchronous control. The drive then adds that target value to the feedback from the machine it is operating to align its speed with the other machinery.

Tacho generator

Pressure control

The drive uses feedback from the actual pressure to hold constant pressure.

Pressure sensor

Flow control

The drive uses feedback from the actual flow to hold constant flow.

Flow rate sensor

Temperature control

The drive uses feedback from the actual temperature to control a fan and hold constant temperature.

Thermocoupler, thermistor