Heating control system and heating control method for separate control of cast polycrystalline silicon top

Abstract

The invention discloses a heating control system and a heating control method for separate control of a cast polycrystalline silicon top. The heating control system comprises a human-machine interface and a distribution cabinet, wherein the human-machine interface is connected with an industrial control computer, the industrial control computer is connected with a control cabinet, a control module is arranged in the control cabinet, the control module is connected with controlled silicon, one path of the controlled silicon is connected with top control controlled silicon via a top signal wire, the other path of the controlled silicon is connected with side control controlled silicon via a side signal wire, both the side signal wire and the top signal wire are connected to the distribution cabinet, the distribution cabinet is connected with an external power supply via two parallel transformers, and each of the top control controlled silicon and the side control controlled silicon comprises three heating electrodes connected by water cables. The system and the method realize equal proportional separate control on power of the top control controlled silicon and the side control controlled silicon via the controlled silicon, can effectively ensure the height fall between the center of a seed crystal layer at the bottom of a crucible and four sides, and realize a full seed crystal leading effect.

Description

technical field [0001] The invention relates to a heating control system and a control method for separately controlling the top and side of cast polysilicon. Background technique [0002] With the development of the economy and the progress of society, people put forward higher and higher requirements for energy, and finding new energy has become an urgent issue facing mankind. The existing sources of electric energy mainly include thermal power, hydropower and nuclear power, but these three kinds of energy have different degrees of impact on the environment we depend on for survival, and there are various hidden dangers in installation. Solar energy is an inexhaustible renewable energy source for human beings, and it is also a clean energy source. It is rich in resources, can be used for free, and does not require transportation. An era of saving energy and reducing pollution. Crystalline silicon solar photovoltaic power generation is currently the fastest-growing, most ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a heating control system and control method for separate control of the top and side of cast polysilicon, which solves the problem of using a thyristor system and a power distribution cabinet system to control the heating of the entire five sides in the existing common ingot casting technology. The ingot casting technology cycle is long, the energy consumption of ingot casting is high, and it is difficult to meet the different requirements for top and side power at different stages of the crystal, so that the crystal melting interface is not flat, and the grain growth cannot be perpendicular to the bottom of the crucible, which affects the crystal forming quality. The problem

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