PROCEDURE FOR MEASURING MOTOR LOSSES On many occasions, it is necessary to measure the losses of a squirrel-cage induction motor to determine the motor output and efficiency. The two types of losses for this motor are the copper losses and the fixed losses. The output of the motor is equal to the input of the […]
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Alternating current fundamentals
Three-Phase Induction Motors: Procedure for measuring motor losses , Speed control, Code letter identification , Motor nameplate data and Stator winding connections .
PROCEDURE FOR MEASURING MOTOR LOSSES On many occasions, it is necessary to measure the losses of a squirrel-cage induction motor to determine the motor output and efficiency. The two types of losses for this motor are the copper losses and the fixed losses. The output of the motor is equal to the input of the […]
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Three-Phase Induction Motors: Power factor and Summary of operating characteristics .
POWER FACTOR A squirrel-cage induction motor operating at no load has a low power factor in the range of 10% to 15% lag. The current input to an induction motor at no load consists of a large component of quadrature magnetizing current and a very small component of in-phase current to supply the losses. The […]
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Three-Phase Induction Motors: Power factor and Summary of operating characteristics .
POWER FACTOR A squirrel-cage induction motor operating at no load has a low power factor in the range of 10% to 15% lag. The current input to an induction motor at no load consists of a large component of quadrature magnetizing current and a very small component of in-phase current to supply the losses. The […]
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Three-Phase Induction Motors: Synchronous speed, Percent slip , Rotor frequency , Torque and speed characteristics and Starting characteristics .
SYNCHRONOUS SPEED The speed at which the magnetic field rotates is known as the synchronous speed. The synchronous speed of a three-phase motor is determined by two factors: 1. The number of stator poles 2. The frequency of the ac line Because 60 Hz is a standard frequency throughout the United States and Canada, the […]
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Three-Phase Induction Motors: Synchronous speed, Percent slip , Rotor frequency , Torque and speed characteristics and Starting characteristics .
SYNCHRONOUS SPEED The speed at which the magnetic field rotates is known as the synchronous speed. The synchronous speed of a three-phase motor is determined by two factors: 1. The number of stator poles 2. The frequency of the ac line Because 60 Hz is a standard frequency throughout the United States and Canada, the […]
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Three-Phase Induction Motors: Three-phase, squirrel-cage induction motor and The rotating magnetic field .
Three-Phase Induction Motors THREE-PHASE, SQUIRREL-CAGE INDUCTION MOTOR A three-phase, squirrel-cage induction motor is shown in Figure 16–1. This motor is simple in construction and is easy to maintain. For a given horsepower rating, the physical size of this motor is small, when compared with other types of motors. It has very good speed regulation under […]
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Three-Phase Induction Motors: Three-phase, squirrel-cage induction motor and The rotating magnetic field .
Three-Phase Induction Motors THREE-PHASE, SQUIRREL-CAGE INDUCTION MOTOR A three-phase, squirrel-cage induction motor is shown in Figure 16–1. This motor is simple in construction and is easy to maintain. For a given horsepower rating, the physical size of this motor is small, when compared with other types of motors. It has very good speed regulation under […]
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Special Transformer Applications : Induction voltage regulator.
INDUCTION VOLTAGE REGULATOR A nearly constant voltage can be maintained on long distribution circuits by compensating for the voltage losses due to varying load conditions. An almost constant voltage can be maintained at the load center of the distribution circuit. In this case, an induction voltage regulator is used to compensate for the resistive and […]
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Special Transformer Applications : Induction voltage regulator.
INDUCTION VOLTAGE REGULATOR A nearly constant voltage can be maintained on long distribution circuits by compensating for the voltage losses due to varying load conditions. An almost constant voltage can be maintained at the load center of the distribution circuit. In this case, an induction voltage regulator is used to compensate for the resistive and […]
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