Marine dual three-phase asynchronous transmission system with low rotating speed and high torque

Abstract

The invention discloses a marine dual three-phase asynchronous transmission system with low rotating speed and high torque. The marine dual three-phase asynchronous transmission system comprises a dual three-phase asynchronous motor, a first speed reduction unit, a second speed reduction unit, a voltage-resistance insulating protection unit, a first three-phase inverter, a second three-phase inverter, a three-phase uncontrolled rectifier bridge, a control actuator, a speed change gear box, an electromagnetic brake unit and a dragging shaft, wherein the two three-phase windings of the dual three-phase asynchronous motor are connected with the first speed reduction unit and the second speed reduction unit in parallel respectively; the voltage-resistance insulating protection unit is connected with the winding ends of the dual three-phase asynchronous motor; the output voltages of the first three-phase inverter and the second three-phase inverter are transmitted to the voltage-resistance insulating protection unit separately; the bus voltages of the first three-phase inverter and the second three-phase inverter are formed by the three-phase uncontrolled rectifier bridge; the control actuator is used for adjusting the output signals of the first three-phase inverter and the second three-phase inverter to further change the rotating speed of the dual three-phase asynchronous motor; the speed change gear box and the electromagnetic brake unit are connected with the rotor shaft of the dual three-phase asynchronous motor; and the rotor shaft is further connected with the dragging shaft used for carrying loads. The marine dual three-phase asynchronous transmission system can improve the torque output under a low speed and can improve the voltage-resistant and insulation property of the motor stator, so that the marine dual three-phase asynchronous transmission system can run safely and reliably under different working conditions.

Description

technical field [0001] The invention belongs to the technical field of AC transmission, in particular to a low-speed, high-torque double-three-phase asynchronous transmission system. Background technique [0002] With the rapid development of science and technology and power electronics, the exploration of marine resources has become possible. With the promotion of marine science and technology and the support of ship technology, the development of the ocean has entered a prosperous new situation. Develop marine economy, adhere to land and sea planning, formulate and implement marine development strategies, and improve marine development, control, and comprehensive management capabilities as one of the country's development plans. At the same time, the development of the ocean is inseparable from the development of marine equipment, which is also a national development strategy, of which marine lifting technology is one of its key technologies. [0003] Marine cranes hoist...

AI Technical Summary

Problems solved by technology

The traditional method does not consider the low-speed, high-torque output characteristics of the motor, and the insulation and withstand voltage protection of the motor. There are deficiencies in practical applications.

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