Question
Download Solution PDFFor synchronous motors, inverted V-curves are the plots of power factor versus ____________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFInverted V – curve:
The excitation and power factor of the synchronous motor can be summed up in the following graph. This is called an inverted V curve of the synchronous motor.
From the inverted V – curve,
- The synchronous motor operates at a lagging power factor when the excitation is under excited.
- The motor operates at a unity power factor at normal excitation.
- The motor operates at a leading power factor when the excitation is over-excited.
Important Points
- Under excited alternator works at the leading power factor
- The normal excited alternator works at the unity power factor
- The overexcited alternator works at lagging power factor
Last updated on May 12, 2025
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