Which of the following is a function of electric drive?
Which of the following is a function of electric drive? Explanation: The electric drive system’s primary duty is to transport energy from the storage system to the wheels, which is utilised to overcome rolling resistance, air resistance, acceleration resistance, and climbing resistance.
What is the function of the electric drive motor?
Is not a part of electrical drive Mcq?
Which of the following is incorrect pertaining to the electrical drives?
What is the advantage of electrical drives Mcq?
The attractive feature of the dc motor is that it offers a wide range of speed control both above and below the rated speeds. Dc series motors are termed as best suited drives for electrical traction applications used for driving heavy loads in starting conditions.
What is heating time constant of the machine?
What is heating time constant of the machine? Explanation: The heating time constant of the machine is the ratio of the thermal capacity of the machine and heat dissipation constant value. Τ = c÷D. It has a unit of second.
How is a hybrid car powered?
Hybrid electric vehicles are powered by an internal combustion engine and one or more electric motors, which uses energy stored in batteries. A hybrid electric vehicle cannot be plugged in to charge the battery. Instead, the battery is charged through regenerative braking and by the internal combustion engine.
What is the voltage for single-phase AC system?
In a single-phase connection, the voltage starts at 230 Volts and has a frequency of about 50 Hertz. Because the voltage in a single-phase connection rises and falls constantly, constant power isn’t delivered to the load. Let’s discuss the advantages and disadvantages of using a single-phase power.
Which type of motor can be used for textile industry?
Normally a 4 pole to 6 pole squirrel cage induction motor is used.
Which affects the terminal voltage of a DC shunt motor?
Explanation: The speed reduced slightly due to armature drops practically. 2. Mark the correct option which affects the terminal voltage of a dc shunt motor. Explanation: If the dc motor has compensating winding, flux will remain constant regardless of load.
Which motor is convenient for smooth and accurate speed control?
For an application that requires smooth and precise speed control over the wide range, the DC motor is preferred. A DC motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy.
Which type of force phenomenon is used in sugar mills?
Which type of force phenomenon is used in Sugar mills? Explanation: In sugar mills, a centrifugal is used to separate out sugar crystals from the syrup by the action of centrifugal forces. Centrifugal force acts away from the center.
What is duty S1 in motors?
S1. Continuous running duty. The duty type S1 can be defined as operation at a constant load maintained for sufficient time to allow the machine to reach thermal equilibrium. For a motor suitable to this duty type, the rating at which the machine may be operated for an unlimited period is specified.
How long does a hybrid battery last?
Most hybrid car manufacturers say a hybrid battery lasts 80,000 to 100,000 miles. However, with the right maintenance and basic auto repair, hybrid owners have reported some batteries lasting up to 150,000 miles and even up to 200,000 miles.
How do you charge a plug-in hybrid at home?
To charge an electric car at home, you should have a home charging point installed where you park your electric car. You can use an EVSE supply cable for a 3 pin plug socket as an occasional back up. Drivers usually choose a dedicated home charging point because it’s faster and has built-in safety features.
How does a split-phase transformer work?
A split-phase power system is one with multiple (in-phase) AC voltage sources connected in series, delivering power to loads at more than one voltage, with more than two wires. They are used primarily to achieve a balance between system efficiency (low conductor currents) and safety (low load voltages).
What does a single-phase plug look like?
The single-phase wire has the two hot wires surrounded by black and red insulation, the neutral is always white and there is a green grounding wire.
How is a single phase motor reversed?
Once started, a single phase induction motor will happily run in either direction. To reverse it, we need to change the direction of the rotating magnetic field produced by the main and starter windings. And this can be accomplished by reversing the polarity of the starter winding.
How do you start a differential compound motor?
In starting a differential compound motor the series field should be short-circuited, as the large starting current passing through the series field may be sufficiently large to overbalance the shunt field ampere-turns and cause the motor to start in the wrong direction.
How do you test a DC shunt motor?
first test the field winding with a megohmmeter to check, that the winding has no short to the housing. Then check the current consumption of the field winding. If you can, start with a low voltage and rise it until you reach the nominal voltage. Look for the maximum current at the specification plate.
How do you change the speed of a single phase AC motor?
Is is possible to control the speed of an induction motor (single or three phase) by reducing the voltage. This will reduce the magnetizing current, flux, and thereby increase the slip, by essentially reducing the rating.