Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
In which machine part/parts does the pulsation loss occurs?
Answer: d Explanation: The pulsation losses occurs in the teeth of the machine. The pulsation losses also occur in the pole faces.
Answer: d
Explanation: The pulsation losses occurs in the teeth of the machine. The pulsation
losses also occur in the pole faces.
See lessHow are the pulsation losses aggravated?
Answer: a Explanation: The pulsation losses occurs in the pole faces and teeth. The pulsation losses are aggravated if the air gap is small compared with slot openings.
Answer: a
Explanation: The pulsation losses occurs in the pole faces and teeth. The pulsation
losses are aggravated if the air gap is small compared with slot openings.
See lessThe slotting produces harmonic fields which cause high frequency losses near the gap surface.
Answer: a Explanation: The pulsation losses are aggravated if the length of air gap is small than the slot openings. The slotting produces harmonic fields which cause high frequency losses near the gap surface.
Answer: a
Explanation: The pulsation losses are aggravated if the length of air gap is small than
the slot openings. The slotting produces harmonic fields which cause high frequency
losses near the gap surface.
See lessIn which machine is the pulsation losses considerable?
Answer: b Explanation: The pulsation losses are aggravated if the length of air gap is small than the slot openings. The pulsation losses although are considerable in the induction motors.
Answer: b
Explanation: The pulsation losses are aggravated if the length of air gap is small than
the slot openings. The pulsation losses although are considerable in the induction
motors.
See lessWhat are the factors the permeance depends upon in the zigzag leakage?
Answer: c Explanation: The permeance for the path of zigzag leakage will depend upon the relative position of stator. The permeance for the path of zigzag leakage will depend upon the relative position of rotor.
Answer: c
Explanation: The permeance for the path of zigzag leakage will depend upon the relative
position of stator. The permeance for the path of zigzag leakage will depend upon the
relative position of rotor.
See lessWhat is the formula for the stored energy at any position?
Answer: c Explanation: First the mmf per slot along with the permeance in a particular position is calculated. On substitution, the stored energy at any position is calculated.
Answer: c
Explanation: First the mmf per slot along with the permeance in a particular position is
calculated. On substitution, the stored energy at any position is calculated.
See lessWhat is the relation between resistivity, magnetizing mmf and magnetizing current?
Answer: b Explanation: The high resistivity materials are made use of to reduce the eddy current loss. The high resistivity materials have high magnetizing mmf which in turn leads to high magnetizing current.
Answer: b
Explanation: The high resistivity materials are made use of to reduce the eddy current
loss. The high resistivity materials have high magnetizing mmf which in turn leads to
high magnetizing current.
See lessWhat is the value of constant ‘a’ in the core part of the ac machines?
Answer: a Explanation: The value of constant ‘a’ in the core part of the ac machines is 4.7 and that in the teeth part is 6.5. The value of constant ‘a’ in the core part of the dc machines is 6.5 and that in the teeth part is 2.3.
Answer: a
Explanation: The value of constant ‘a’ in the core part of the ac machines is 4.7 and that
in the teeth part is 6.5. The value of constant ‘a’ in the core part of the dc machines is
6.5 and that in the teeth part is 2.3.
See lessWhat are the equations that are to be satisfied by flux patterns?
Answer: c Explanation: The flux patterns must satisfy the Poisson equation within the section of the conductors. The flux patterns must satisfy the Laplace equation in the other parts.
Answer: c
Explanation: The flux patterns must satisfy the Poisson equation within the section of the
conductors. The flux patterns must satisfy the Laplace equation in the other parts.
See lessHow many assumptions can be used for the slot leakage calculation?
Answer: b Explanation: There are 3 assumption made in the slot leakage calculation. They are the current in the slot conductors is uniformly distributed, the leakage path is straight across the slot and around the iron at the bottom and the permeance of air paths is only considered.
Answer: b
Explanation: There are 3 assumption made in the slot leakage calculation. They are the
current in the slot conductors is uniformly distributed, the leakage path is straight across
the slot and around the iron at the bottom and the permeance of air paths is only
considered.
See less