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Three-phase thyristor power controller and phase change control method

A technology of power controller and thyristor, applied in the direction of output power conversion device, AC power input conversion to AC power output, electrical components, etc., can solve problems such as difficult to achieve effect, affect product quality, uneven heating, etc., to achieve High promotion and application value, optimization of heating unevenness, and effect of quality improvement

Inactive Publication Date: 2012-12-26
SICHUAN INJET ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the general three-phase thyristor power controller is used to supply power to the load, since the power grid is a non-ideal power grid, there must be an unbalanced phenomenon, and the three-phase voltage values ​​of A, B, and C are not equal; Balance phenomenon, when the load is unbalanced, the phase of the three-phase electricity will also have an impact on the actual power of each phase load
Therefore, using a fixed phase to supply power to the load may cause uneven heating, which will eventually affect the quality of the product, resulting in a high scrap rate, and it is difficult to achieve satisfactory results

Method used

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  • Three-phase thyristor power controller and phase change control method
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  • Three-phase thyristor power controller and phase change control method

Examples

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Embodiment 1

[0027] as attached figure 1 As shown, the three-phase thyristor power controller in this embodiment includes a control board and 5 groups of thyristor bridges, the thyristor bridge is formed by two thyristors connected in reverse parallel, and the control board is electrically connected with 5 groups of thyristor bridges respectively, through The control board outputs 5 sets of driving signals to respectively control the conduction state of each group of thyristor bridges, wherein the common input terminals of the first group of thyristor bridge 1 and the second group of thyristor bridge 2 are connected to the A-phase voltage, and the input terminals of the third group of thyristor bridge 3 The common input terminals of the fourth group of thyristor bridges 4 and the fifth group of thyristor bridges 5 are connected with the C-phase voltage; in addition, the first group of thyristor bridges 1 and the fourth group of thyristor bridges 4 have common output terminals, which can be...

Embodiment 2

[0034] as attached Figure 4 As shown, the three-phase thyristor power controller in this embodiment includes a control board and 6 groups of thyristor bridges, the thyristor bridges are formed by two thyristors connected in reverse parallel, and the control board is electrically connected to 6 groups of thyristor bridges respectively, through The control board outputs 6 groups of driving signals to respectively control the conduction state of each group of thyristor bridges. Among them, the common input terminal of the first group of thyristor bridge 1 and the second group of thyristor bridge 2 is connected to the A-phase voltage, and the common input terminal of the third group of thyristor bridge 3 and the fourth group of thyristor bridge 4 is connected to the input terminal of the B-phase voltage. The common input terminals of the five groups of thyristor bridges 5 and the sixth group of thyristor bridges 6 are connected to the C-phase voltage; in addition, the first group...

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Abstract

The invention relates to a power controller, in particular to a three-phase thyristor power controller with an interchangeable output phase sequence and a phase change control method. The three-phase thyristor power controller comprises a control panel and at least five groups of thyristor bridges, wherein each thyristor bridge is formed by reversely connecting two thyristors in parallel; each thyristor bridge is provided with an input end and an output end; and the control panel is electrically connected with each group of thyristor bridges respectively. The phase-interchangeable three-phase thyristor power controller is adopted, phase change can be performed on an output voltage, the phase change time can be set according to a use requirement, and the phenomenon of non-uniform heating of a three-phase load is optimized, so that the product quality is improved, an optimal effect which meets the production process requirements is achieved, and the power controller has extremely high popularization and application values.

Description

technical field [0001] The invention relates to a power controller, in particular to a three-phase thyristor power controller with interchangeable output phase sequence and a phase commutation control method. Background technique [0002] Thyristor power controllers are also called SCR power regulators, thyristor voltage regulators or power regulators. Thyristor power controllers are divided into single-phase thyristor power controllers, two-phase thyristor power controllers and three-phase thyristor power controllers from the phase of control. The control of the conduction state of the thyristor by the existing power controller is generally divided into two methods: phase-shift control and zero-crossing control, that is, the conduction state of the thyristor is controlled by controlling the α angle of the thyristor. [0003] In industry, three-phase electricity is often used for power supply, and the load is a three-phase load. When the general three-phase thyristor powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/257
Inventor 周英怀陈毅松周文全
Owner SICHUAN INJET ELECTRIC CO LTD