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computation electric actuator on durability

The question of calculating the actuator on the strength of reason, not lit in the technical literature, despite its relevance in everyday work designer. He always causes a lot of questions from novice designers. The method of calculating the actuator is simple. This method of jamming . Let us clarify its essence. Actuator - a chain of devices that mechanically linked to each with one another. At one end of the chain motor is (or electro- magnet), and at the other end - the actuator. essence of the method. Actuator mentally jams in any randomly selected location, and the chain of devices is calculated on the strength of loads developed by an electric motor (solenoid). Data on the torque developed by motor is sometimes found in reference books, but in their absence, the time can be determined by the following formula: N = M * w where N - motor power, W M - rated torque at the motor shaft, Nm w - angular velocity of the motor shaft, rad / s For most engines (such as asynchronous AC) should take into account the magnification of starting torque to nominal, which is proportional to the magnification inrush current (shown in references). The correctness of the calculation load can be verified by diameter shafts elektrodvi- engines, gearboxes, clutches and other standard devices. We should not forget about safety factor and the possibility of torque control drive (use of protective and control devices).
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