Complex three phase AC motor

Abstract

The name of this invention is: a multiple 3-phase AC motor relating to many industrial fields of oils, mines, steels and cements. Many devices are very heavy when they start, large power motors should be prepared, yet, their load reduces after start, the output power of the motor is reduced too, thus its efficiency and power factor are low to result in heavy waste in energy. Now, a multiple 3-phase AC motor is used, which can ensure enough start moment at start since double motors operate, then one operates while the other stops running after it turns to normal operation. The stand-by supply can be shared by several synchronous motors.

Description

technical field [0001] The present invention relates to various industrial fields such as petroleum, mining, steel and cement. Background technique [0002] In various industrial fields such as petroleum, mining, steel, cement, etc., quite a lot of equipment has a heavy load when starting, and must be equipped with a large-power motor. The reduction, the load is often lower than 50% of the rated power. In this way, the efficiency and power factor of the motor are very low, resulting in serious waste of energy. Contents of the invention [0003] In order to save energy and improve the efficiency and power factor of the motor, dual-motor drive is used for equipment that requires high starting power and low operating power, that is, two motors with the same power or different power are connected coaxially. When starting, the two motors operate to ensure a sufficiently large starting torque, and after turning into normal operation and reducing the load, one motor stops and t...

AI Technical Summary

Problems solved by technology

In this way, the efficiency and power factor of the motor are very low, resulting in serious waste of energy.

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