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Servo Drive & Motor Expert | VFD AC Drive Repair

Posted on 8th Jan 2024

Lenze Drive and KEB Drive for 3 phase motor

Lenze Drive

If you have a three-phase motor and you want to control its speed or other parameters, you can use a Variable Frequency Drive (VFD). A VFD is a device that can vary the frequency and voltage supplied to the motor, allowing you to control its speed and other characteristics. Here are the general steps to connect a Lenze Drive and KEB Drive to a three-phase motor:

Power Supply:

Connect the VFD to a three-phase power supply. Ensure the input voltage matches the VFD specifications and the motor specifications.

Motor Connection:

Connect the three-phase motor to the output terminals of the VFD. Check the VFD's documentation for the specific terminals labeled U, V, and W for the motor connections.


Properly ground the VFD according to the manufacturer's instructions. This is crucial for safety and proper operation.

Control Wiring:

Connect the control wiring according to the VFD's manual. This may include connections for start, stop, speed reference (potentiometer or analog input), and other control signals.

Parameters Setting:

Set the parameters on the VFD to match the motor specifications and the desired operation. This includes motor parameters such as voltage, current, and frequency.


Test the system in a controlled environment to ensure proper functioning. Start with low speeds and gradually increase to full speed.

Precautions and Tips:

Ensure that the VFD is sized appropriately for the motor. Check the VFD's specifications and the motor's nameplate information.

Carefully follow the manufacturer's instructions for installation, wiring, and parameter settings.

Be cautious about electrical safety. Ensure that power is disconnected before making any connections or adjustments.

If you are unsure about any aspect of the installation, consult with a qualified electrician or contact the VFD manufacturer for support.

Regularly inspect and maintain the VFD system to ensure optimal performance.

Remember that the specifics may vary depending on the make and model of the VFD such as Lenze Drive and KEB Drive available at CM Industry Supply Automation and the three-phase motor you are using. Always refer to the documentation provided by the VFD manufacturer and the motor manufacturer for accurate and safe installation.