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What Is Static Kramer Drive | Definition And Working Method

by Vishnu Patil Leave a Comment

Hello friends, in today’s article we will see what is Static Kramer Drive and what is its working method.

Definition: In a Static Kramer Drive rotor circuit the speed of the induction motor can be stopped by giving the voltage of the opposite phase. The given voltage increases the impedance of the speed of the rotor thus the speed of the motor is controlled. The motor impedance and speed can be controlled by changing the given voltage.

Also Read: What Is Motor Winding | Types Of Motor Winding | Motor Winding Calculation

Table of Contents

  • Static Kramer Drive:
    • Static Kramer Drive Working Method:

Static Kramer Drive:

The Static Kramer Drive converts the sleep power of the induction motor to AC power and supplies it back to the line. Sleep power is said to be caused by the air gap between the rotor and the stator of the induction motor. Such power is not converted into mechanical power which is the loss of this power. In this way, the Static Kramer Drive manages the power in vain. This method only applies when the drive speed is less than the synchronous speed.

Static Kramer Drive:

Also Read: Best Pole Changing Method Of Speed Control Of Induction Motor

Static Kramer Drive Working Method:

The power of the rotor sleep is converted to DC with the help of a diode bridge. This DC power is now supplied to the DC motor. Which is connected to the induction motor with the help of a coupler. The torque supplied to the load is the total sum of the torque produced by the induction and the DC motor drive.

Static Kramer Drive

 

As shown in the figure, the field current of the DC motor represents the variation of VD1 and VD2 with the speed of two values. Thus the value of VD1 is the same as VD2. Only then the steady-state operation is achieved in the drive. This means that for field flows of I1 and IF2 at A and B.

Such speed control is possible only when the speed of the motor is half or less than the synchronous speed when the motor is to be driven at a higher speed. This is connected to the thyristor bridge instead of the diode bridge. The relationship between VAD1 and speed can be changed by controlling the firing angle of the thyristor bridge amplifier. The speed can now be easily controlled to stabilize

 

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Filed Under: Electrical Drive

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Hey, I am Vishnu Patil and I'm an Electrical Engineer and Electrical maestro. I have more than 10 years of experience with electricals. Through ElectricalGang I want to spread my knowledge with everyone else.

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