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How to choose an electric motor

2013-09-22
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1. Understand the basic theory of motor capacity selection and motor working mode. 2. Master the method of motor capacity selection. Key point: Motor capacity selection method. General concept of motor selection The significance of correctly selecting motor capacity If the motor capacity is too large, the motor efficiency is low and the capacity is wasted. If the motor capacity cannot be fully utilized; if the capacity is too small, the motor will overheat and the motor life will be reduced. The insulation material of each motor limits its maximum allowable temperature. If the operating temperature exceeds the allowable temperature, the insulation life will be shortened by half for every 8°C increase. Therefore, it is necessary to select the appropriate capacity. When selecting a motor, in addition to selecting the capacity, you must also select the type of motor, current type, speed, etc. The main method of capacity selection: After determining the current type (AC, DC, excitation mode), pre-select the motor capacity according to the load power. Then perform various checks. 1. Heating effect test According to the heating conditions, the test should meet: P and T are the output power and output torque of the motor.

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