Braking Resistor Calculation Braking Resistor In ac Drive Braking Resistor Ohm & Power Rating

Braking Resistor Calculation. Breaking Resistor In ac Drive.Braking Resistor Resistance & Power Rating Calculation.

This Video is about How to calculate the Resistance and Power rating require for your braking resistor used for VFD. This video becomes helpful for the electrician and Engineer who want to know about the braking resistor Value for their VFD.

Braking resistors are used for applications where the motor speed exceeds the speed that is set by the variable frequency drive (VFD) or when fast deceleration is required. They can provide controlled braking to motor. If the rotational speed of the motor exceeds the synchronous velocity from the VFD, it will act as a generator. The extra voltage will be fed into the VFD and increase the voltage on the DC bus.If this Voltage does not control proper way it can damage the VFD.

It is important to select correct size a braking resistor. The lower ohm of a resistor, the faster it can stop the motor and the more heat it generates. To compensate this the resistor must be big. The designer calculates the power of the resistor to sustain under the temperature limits during braking.

Part 1 Braking Resistor Connection in VFD.Use Of Braking Resistor In VFD. How Braking Resistor work in VFD.

Problem Solved:
1)How do you calculate the dynamic braking resistor for a VFD?
2) How to calculate Braking Resistor Resistance and Power Rating for ac drive?

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