Danfoss Vfd Control Wiring Diagram

By | April 8, 2023

Danfoss VFD Control Wiring Diagram

Danfoss variable frequency drives (VFDs) are used to control the speed of AC motors. They are a versatile and efficient way to control a wide range of applications, from fans and pumps to conveyor belts and machine tools. To connect a Danfoss VFD to a motor, you will need the following components: * A Danfoss VFD * A motor * A power supply * A control circuit The power supply can be either a single-phase or three-phase AC source. The control circuit can be either open-loop or closed-loop. The following diagram shows the basic wiring for a Danfoss VFD with a single-phase AC power supply and an open-loop control circuit:

1. Power Supply

The power supply for the VFD can be either a single-phase or three-phase AC source. The voltage and frequency of the power supply must match the specifications of the VFD.

2. Motor

The motor must be compatible with the VFD. The motor must have the same voltage and frequency as the VFD. The motor must also be able to handle the maximum current output of the VFD.

3. Control Circuit

The control circuit is used to send signals to the VFD to control the speed of the motor. The control circuit can be either open-loop or closed-loop. *

Open-loop control

is the simplest type of control circuit. In an open-loop control circuit, the VFD receives a signal from the controller to set the desired speed of the motor. The VFD then uses its internal control loop to adjust the motor speed to the desired speed. *

Closed-loop control

is more complex than open-loop control. In a closed-loop control circuit, the VFD receives a signal from the controller to set the desired speed of the motor. The VFD then uses a feedback sensor to measure the actual speed of the motor. The VFD compares the actual speed to the desired speed and makes adjustments to the motor speed as needed. The following table shows the wiring connections for a Danfoss VFD with a single-phase AC power supply and an open-loop control circuit: | Connection | Pin | Description | |---|---|---| | L1 | 1 | Power supply L1 | | L2 | 2 | Power supply L2 | | N | 3 | Power supply neutral | | VFD IN1 | 4 | Control input 1 | | VFD IN2 | 5 | Control input 2 | | VFD IN3 | 6 | Control input 3 | | VFD IN4 | 7 | Control input 4 | | VFD IN5 | 8 | Control input 5 | | VFD IN6 | 9 | Control input 6 | | VFD IN7 | 10 | Control input 7 | | VFD IN8 | 11 | Control input 8 | | VFD COM | 12 | Control common | | M1 | 13 | Motor phase 1 | | M2 | 14 | Motor phase 2 | | M3 | 15 | Motor phase 3 | For more information on Danfoss VFDs, please refer to the product documentation. ## Conclusion Danfoss VFDs are a versatile and efficient way to control the speed of AC motors. They are easy to install and use, and they offer a wide range of features and benefits. If you are looking for a way to control the speed of an AC motor, a Danfoss VFD is a great option.


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