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The efficiency of a motor is the output power divided by the input power. The difference is the lost power which appears as heat usually. High-efficiency motors produce very little lost power. But they tend to be more massive and expensive to make, so that most motor designs have to compromise on efficiency.
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What is the approximate efficiency of a 60 cycle 6 pole induction motor running at 1050 rpm and having a synchronous speed of 1200 rpm?
A round figure might be 85-90%. But smaller motors are designed for lower efficiency to reduce the cost of the motor, and high-powered motors are designed to be highly efficient, despite the increased cost, to avoid wasting a significant amount of energy.
What is high voltage motors and low voltage motors?
None: "high tension" is just another way of saying "high voltage".
Why Amplifier of class B has high theoretical efficiency of 78.5 percent?
The Class B amplifier is a push pull amplifier with 78.5% efficiency. The high efficiency is due to the absence of power consumption during idle time which simultaneously increases the efficiency.
Which type of motor is used in lathe?
The type of motor used depends on the size of the lathe.Small "hobby" lathes use small fractional (1/8, 1/4...) horsepower ac motors which run on household single-phase power.The lathes which are used to produce crankshafts for huge marine diesel engines - or the rotor shafts of the massive alternators used to generate megawatts of electrical power - must use giant-sized motors, producing hundreds of horsepower.DC SHUNT MOTORS.Three-phase electric motor.
How is condenser high efficiency obtained?
the high efficiency is obtained by using a larger condenser surface or by using more mordern alloys with more extended surface or fins
