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Control circuit for parallel and series connection of polysilicon reduction power supply silicon rod

A technology of control loops and polysilicon, applied in control/regulation systems, regulation of electrical variables, instruments, etc., can solve problems such as inconvenient maintenance, harmonic pollution, and complex control, and achieve easy maintenance, power saving, and simple control Effect

Active Publication Date: 2011-01-19
SICHUAN INJET ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] the above image 3 , Figure 4 The control loop shown realizes the series-parallel technology, which solves the problem of wide range of voltage and current changes; uses stack control to solve the problem of harmonic pollution, but the above control loop must use multiple sets of stack control, at least two sets Control system, the control is relatively complicated; the circuit is complicated and maintenance is inconvenient

Method used

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  • Control circuit for parallel and series connection of polysilicon reduction power supply silicon rod
  • Control circuit for parallel and series connection of polysilicon reduction power supply silicon rod
  • Control circuit for parallel and series connection of polysilicon reduction power supply silicon rod

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Embodiment 1

[0036] This embodiment 1 takes the transformer with 4 taps as an example, and its one-phase control loop is as follows Figure 5 shown.

[0037] The present embodiment 1 is a control circuit in which polysilicon reduction power supply silicon rods are connected in series. There are 4 groups of taps (U1, U2, U3, U4) on the secondary side of the transformer T. The 4 taps are respectively connected in series with a thyristor. One end of each thyristor are all connected in series on the tap, and the other ends of all thyristors are connected in parallel to one end of the first switch K1 and the second switch K2 respectively, and the first group of load RM is connected between the other ends of the first switch K1 and the second switch K2, The other end of the first switch K1 is also connected to one end of the fourth switch K4 via the third switch K3, and a second group of loads RN is connected between the other end of the fourth switch K4 and the other end of the second switch K2...

Embodiment 2

[0050] This embodiment 2 takes the transformer with 4 taps as an example, and its one-phase control loop is as follows Image 6 shown. In Embodiment 2, a transformer T2 is added on the basis of Embodiment 1. Adding the transformer T2 will make the power supply system work better.

[0051] The present embodiment 2 is a kind of control circuit in which polysilicon reduction power supply silicon rods are connected in series. There are 4 sets of taps (U1, U2, U3, U4) on the secondary side of the transformer T. The 4 taps are respectively connected in series with a thyristor. One end of each thyristor are all connected in series on the tap, and the other ends of all thyristors are connected in parallel to one end of the first switch K1 and the second switch K2 respectively, and the first group of load RM is connected between the other ends of the first switch K1 and the second switch K2, The other end of the first switch K1 is also connected to one end of the fourth switch K4 via ...

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Abstract

The invention discloses a parallel serial control circuit for polysilicon reducing power silicon rod, which is characterized in that: the secondary side of a transformer (T) is provided with a plurality group of taps, each tap is connected in series with one end of a thyristor, the other ends of all the thyristors are connected in parallel and then are respectively connected with a first switch (K1) and a second switch (K2), the middle of the first switch (K1) and the second switch (K2) is connected with a first group of load (RM), the first switch (K1) is connected with a fourth switch (K4) through a third switch (K3), and the middle of the fourth switch (K4) and the second switch (K2) is connected with a second group of load (RN). The control circuit of the invention adopts an arbitrarytap and automatic parallel serial switching is controlled by the switch, thus solving the problem of power factor, harmonic wave, and the like, and moreover, having the following advantages: 1. a clearer circuit and easy maintenance; 2. easy control and reduced fault occurring; and 3. saving power devices (the thyristor).

Description

technical field [0001] The invention relates to a polysilicon reduction power supply, in particular to a control loop in which silicon rods of the polysilicon reduction power supply are connected in series. Background technique [0002] Polysilicon is the most basic raw material for information and solar energy industries. The polysilicon reduction furnace is a very important technical equipment in the polysilicon production process, which completes the production process from trichlorosilane to polysilicon. There are 9 pairs of rods, 12 pairs of rods, 18 pairs of rods, 24 pairs of rods and 36 pairs of rods in the production mode of polycrystalline reduction. [0003] The role of the polysilicon reduction power supply is to provide appropriate voltage and current during the entire production process to keep the surface temperature of the silicon rod at the value required for the growth of the silicon rod. [0004] In the initial stage of polysilicon reduction, the diameter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/20
Inventor 周英怀陈毅松邓长春
Owner SICHUAN INJET ELECTRIC CO LTD