Question
Download Solution PDFFor speed control of a DC motor, which technique provides speed above base speed?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFArmature resistance control:
We know that,
We can control the speed by increasing armature resistance. This method gives only below base speeds. This method is constant torque and variable power drive.
Field control method:
We know that,
By varying flux, we can increase the speed more than its base speed. This method is constant power and variable torque drive.
The characteristics are shown below
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