Control system for curing forming of bent portion of stator coil of large-capacity air-cooled generator

Abstract

The invention discloses a control system for curing forming of a bent portion of a stator coil of a large-capacity air-cooled generator. The control system for curing forming of the bent portion of the stator coil of the large-capacity air-cooled generator comprises a master station control system, a heating and curing temperature control driving system, a temperature control system, a heater line breakage detection system, an industrial monitoring system and a mechanical electrical substation. According to the control system for curing forming of the bent portion of the stator coil of the large-capacity air-cooled generator, a master station controller is adopted, all control is automatically completed through the master station controller, manual intervention is not needed, control over heating, curing forming is achieved fully automatically, the labor is liberated greatly; temperature compensation is achieved by each temperature sensor through a standard thermal resistance temperature compensation instrument, and the accuracy of the temperature is improved; due to the fact each sensor is in zero-distance contract with the coil, heating precision is improved; the side which a heating plate coil leans against is integrally flat through full-screw-thread fit; on the whole, the quality of the coil is improved; due to the fact that the closed-loop PID algorithm is adopted, the temperature control precision can be improved, overshoot can be reduced, and the curing quality of the coil is improved remarkably.

Description

technical field [0001] The invention relates to a production technology for solidification and molding of stator coil bends, in particular to a control system for solidification and molding of stator coil bends of large-capacity air-cooled generators. Background technique [0002] The stator coil is the core component of the generator, and the process and production level of the stator coil directly affect the performance and service life of the generator. At present, there are mainly two methods for curing the stator coil bending at home and abroad: one is heating and curing in the coil, and the other is curing by manually controlling the power on and off to control the heating tube. The internal heating and curing method is mainly to convert the factory power (generally 380V) into a power supply below 24V through a transformer, and then directly connect the two ends of the stator coil through the cable to heat and cure the coil. The principle of internal heating and curin...

AI Technical Summary

Problems solved by technology

The main disadvantage of manual control of power on and off is that the process adjustment is completely manual, the temperature control is unstable, and the quality compliance rate of the stator coil is not high.

In addition, when the heating tube fails in the way of manually controlling the power on and off, it cannot be detected

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