Zapi AC-2 Service Manual download pdf (Page 85)

85

85

- Some basics.

DC controller system AC controller system

- In a close loop speed control system a

feedback signal is returned from the motor to

the controller. If the speed doesn’t match the

requirements, the power output to the motor is

automatically adjusted until the proper speed is

reached.

- In a open loop speed control system NO

feedback signal from the motor returns to the

controller. Only a speed requirement signal

arrives at the controller.

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