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Electric Machines: Pole Pitch and Coil Relations

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Electric Machines: Pole Pitch and Coil Relations

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Questions and Answers

What is the ratio of induced emf in a coil with short pitch winding to the induced emf in the same coil with full pitch winding?

$e \cos \frac{E}{2}$

$\frac{e}{2}$

$2e$

$2e \cos \frac{E}{2}$ (correct)

What is the coil span factor generally denoted by?

$Ks$

$Kp$

$Kc$ (correct)

$Kf$

In a distributed winding, where are all the conductors of any one phase, which lie under a single pole, placed?

Under different phases

In a single slot

In multiple slots (correct)

Under different poles

What is the relationship between the emfs induced in conductors lying in two adjacent slots in a distributed winding?

They are similar in wave shape and magnitude Signup and view all the answers

What does the slot pitch represent?

Phase difference between two adjacent slots Signup and view all the answers

What is the term used to describe the ratio of induced emf in a coil when it is short pitched to when it is full pitched?

Span factor Signup and view all the answers

How are the conductors arranged under a single pole in a concentrated winding?

In a single slot Signup and view all the answers

What is the name given to the number of coils representing each phase connected in series in a distributed winding?

Coil group Signup and view all the answers

'Chorded factor' and 'pitch factor' are alternative names for what term?

$Kc$ Signup and view all the answers

'Distribution Factor' relates to what aspect of winding design?

Conductor arrangement under poles Signup and view all the answers