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What type of excitation is used in the small universal commutator motors and what type of supply is provided?
Answer: b Explanation: The excitation which is provided is the series excitation in the small universal commutator motors. The type of supply provided is dc or ac supply.
Answer: b
See lessExplanation: The excitation which is provided is the series excitation in the small
universal commutator motors. The type of supply provided is dc or ac supply.
What are the applications of the small universal commutator motors?
Answer: d Explanation: Small universal commutator motors have power outputs varying from few watts to hundreds of watts. They have lots of application in industry, medicine, domestic sector.
Answer: d
See lessExplanation: Small universal commutator motors have power outputs varying from few watts to hundreds of watts. They have lots of application in industry, medicine, domestic sector.
The active resistance of the stator winding is calculated at the temperature of 45°c
Answer: b Explanation: The active resistance of the stator winding determination is one of the steps in the design of stator windings. The value is calculated at the temperature of 45° C.
Answer: b
See lessExplanation: The active resistance of the stator winding determination is one of the steps in the design of stator windings. The value is calculated at the temperature of 45° C.
What is the formula for the slot pitch factor in design of rotors?
Answer: c Explanation: First the rotor diameter and the number of rotor slots are first calculated. On substitution the slot pitch factor can be obtained.
Answer: c
See lessExplanation: First the rotor diameter and the number of rotor slots are first calculated. On substitution the slot pitch factor can be obtained.
How many design steps are involved in the determination of the losses and efficiency?
Answer: b Explanation: There are 3 steps involved in the determination of the losses and efficiency. They are copper loss in stator winding, iron loss in stator steel, mechanical loss in the motor.
Answer: b
See lessExplanation: There are 3 steps involved in the determination of the losses and efficiency. They are copper loss in stator winding, iron loss in stator steel, mechanical loss in the motor.
How many steps are involved in the design of performance parameters?
Answer: c Explanation: There are 7 steps involved in the design of the performance parameters. They are no load current, height of steel stator teeth, weight of steel in the stator core, copper loss in the stator winding under no load, active resistance and leakage reactance, active component of noRead more
Answer: c
See lessExplanation: There are 7 steps involved in the design of the performance parameters.
They are no load current, height of steel stator teeth, weight of steel in the stator core,
copper loss in the stator winding under no load, active resistance and leakage
reactance, active component of no load current, starting torque of 3 phase reluctance
motor.
How many steps are present in the calculation of the design of rotor of reluctance motors?
Answer: a Explanation: There are 4 steps involved in the design of rotor of reluctance motor. They are rotor diameter calculation, height of rotor core, mmf for magnetic circuit, saturation coefficient of motor.
Answer: a
See lessExplanation: There are 4 steps involved in the design of rotor of reluctance motor. They are rotor diameter calculation, height of rotor core, mmf for magnetic circuit, saturation coefficient of motor.
How many steps are present in the calculation of the design of stator windings?
Answer: b Explanation: There are 11 steps involved in the calculation of the design of stator windings. They are input current to motor, number of stator slots, stator winding pitch, winding factor, useful flux, number of turns per stator winding, cross sectional area of the stator winding, slot areRead more
Answer: b
See lessExplanation: There are 11 steps involved in the calculation of the design of stator
windings. They are input current to motor, number of stator slots, stator winding pitch, winding factor, useful flux, number of turns per stator winding, cross sectional area of the stator winding, slot area, mean length for conductor, active resistance of stator winding, specific permeance of leakage flux.
How many steps are present in the calculation of the determination of main dimensions?
Answer: a Explanation: There are 5 steps present in the calculation of the determination of main dimensions. They are electromagnetic power of reluctance motor, output coefficient, pole pitch, pole arc, peripheral velocity.
Answer: a
See lessExplanation: There are 5 steps present in the calculation of the determination of main
dimensions. They are electromagnetic power of reluctance motor, output coefficient,
pole pitch, pole arc, peripheral velocity.
What is the range of the constant used in the calculation of the active power of reluctance motor?
Answer: b Explanation: The minimum value of the range of the constant used in the calculation of the active power of reluctance motor is 0.35. The maximum value of the range of the constant used in the calculation of the active power of reluctance motor is 0.55.
Answer: b
See lessExplanation: The minimum value of the range of the constant used in the calculation of the active power of reluctance motor is 0.35. The maximum value of the range of the constant used in the calculation of the active power of reluctance motor is 0.55.