Titlebook: Energy-Efficient Electric Motors and their Applications; Howard E. Jordan Book 1994 Springer Science+Business Media New York 1994 Motor.Ph

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Energy-Efficient Electric Motors and their Applications978-1-4899-1465-1

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ac Motor Control and Protection: Starting, Running Protection, and Surge Protection, may be needed. Light flicker is a common symptom of voltage reductions that occur during motor starting. This is often tolerable, but if the voltage reduces to such a low level that the motor will not start the load, then some corrective action needs to be taken. Computers and production equipment

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Technology of Energy-Efficient Motors,own. Although some losses do occur in the conversion process, the majority of the electrical energy which enters the motor is converted to mechanical form and delivered to the load. Consider Fig. 2.1 which shows a 50-hp motor driving a pump of equivalent rating. The power distribution is shown in th

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Power Factor,o heat in the form of motor losses. The second, reactive energy, is stored in the inductive elements of the machine. If a motor, or any ac circuit for that matter, has no capacitive or inductive elements, then all of the energy is expended as real power, but if either capacitance, inductance, or bot

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ac Motor Control and Protection: Starting, Running Protection, and Surge Protection,, electronically controlled starting is being used. When rated voltage is applied to a motor at standstill, the inrush current is several times the rated load current. For motors in the medium ac size, the starting torque accompanying this high inrush current generally exceeds 100% of full-load torq