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- By using the star- delta starting method
- By using variable rhoestats
- By using auto Transformers
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What is difference IN DRIVE AND MOTOR?
An electric motor is an electromechanical energy conversion devicewhereas an electric drive is that which involves control of speed or position of the motor.
What is the speed of a 3kW electric motor?
The speed of motion generated by a motor is not a function of its nominal power. The nominal power, 3kW in this example, is an indicator for the electric power consumed, and for the force available in the direction of motion. The speed of a motor is determined by its construction, and can cover an extremely wide range regardless of its power.
What is an electrical drive?
the aggregate of electric motor,the energy transmitting shaft and the control equipment by which the motor characteristics are adjusted and controlled is called an electrical drive.
Does the RPM of a motor vary if a load is added to the motor?
The speed of an electric motor is directly proportional to the frequency of supply. The rpm written on the name plate is the maximum operating speed for the motor design. Typically, for a squirrel cage induction motors, the speed is constant by design and this type of motor cannot operate for a long time at speeds below the rated value. It is true that loading affects motor speed to some extend but the electric motor will accelerate to the rated speed. If the loading is within the design parameters of the motor, the electric motor speed will not drop. What typically happens is that if the loading increases, the speed goes down, and the current increases. Because voltage is constant, this result in a high I2R loss in the windings and the motor circuit protection trips on thermal and electrical overload. The formula for electric motor speed is SRPM=(120f)/P. The above is for AC motors. If you are referring to a DC motor, what you have stated is correct. The motor will slow down as load is added. That is why you are not supposed to run many DC motors under no load conditions - they will overspeed.
Replace two speed electric motor with single speed electric motor?
Replace with single speed of the same electrical, speed, and mechanical considerations for mounting, choosing the preferred speed from the existing two speed. In general it is common practice especially in the HVAC industry to replace a three speed motor with a four speed motor, using only three of the speeds that match the existing. Replacement must be with a single speed of the same horsepower, torque, and other electrical considerations of the needed or preferred two speed choice of speeds. Often the choice of speed, changes the horsepower or torque.
What happens if you use synchronous motor in ceiling fans?
Synchronous motors are much more efficient at converting electric power into motion. However, the speed of the motor is controlled by the frequency of the electric supply. So a synchronous motor ceiling fan would be much more efficient, but the speed of the fan would not be controllable, unless frequency controlled power supplies (inverter power) are used.
How do you control the speed on an ac motor?
the speed of ac motor can be controlled by controlling the synchronous speed (Ns=120f/p). and synchronous speed can be varried or controlled by changing frequency or by changing poles. but practicaly pole can not be changed. but we can change the frequency. the frequency can be VFD (Variable frequency Drives). so the speed of ac motor can be chaged or controlled by VFD.
The operation of an electric motor depends on?
Controlled movement of magnetic fields.
What is difference IN DRIVE AND MOTOR?
An electric motor is an electromechanical energy conversion devicewhereas an electric drive is that which involves control of speed or position of the motor.
What is a controlled high speed skid in motor racing called?
A drift
What is the relationship between torque and speed for an electric motor?
Torque and speed are inversely proportional
Is there a relay for the blower motor in a 1989 dynasty?
Only for the high speed. The lower speeds are controlled with the use of a blower motor speed resistor.
Speed control of motor using SCR?
An SCR chip is commonly used to control the speed of a motor. The speed is controlled using an AC circuit and phase angles.
What control the speed of a piston on a pneumatic motor?
The speed of a pneumatic motor is controlled by regulating the flow of intake air with a proportional control valve Paul Berbakov
What is the speed of a 3kW electric motor?
The speed of motion generated by a motor is not a function of its nominal power. The nominal power, 3kW in this example, is an indicator for the electric power consumed, and for the force available in the direction of motion. The speed of a motor is determined by its construction, and can cover an extremely wide range regardless of its power.
What is the name of electric motor in which both rotor and stator fields rotate with same speed?
only synchronous motor
Why do you control the speed of DC motors?
because dc motor is a powerful & dangerous motor it is akiller
