Lamination control device and lamination control method

Abstract

The invention provides a lamination control device. The lamination control device comprises a controller, a transformer and a plurality of groups of thyristors, wherein the transformer comprises a primary coil and a secondary coil; the secondary coil of the transformer is provided with a plurality of taps with different voltage levels and a reference end; one ends of each group of thyristors are correspondingly connected with the taps with different voltage levels and in the secondary coil of the transformer, and the other ends of each group of thyristors are connected with each other and connected with one end of a load; the reference end of the secondary coil of the transformer is connected with the other end of the load; each group of thyristors comprises a thyristor used for conductinga positive half cycle of the voltage of a corresponding tap and a thyristor used for conducting a negative half cycle of the voltage of the corresponding tap, and the two thyristor are connected in parallel in the group; and each thyristor is controlled by the controller. The invention further provides a lamination control method. The lamination control device and lamination control method of theinvention have the advantages of low current impact and almost no harmonic wave.

Description

technical field [0001] The invention relates to a power control device of a high-power heater, in particular to a lamination control device. Background technique [0002] When the high-power heater is in use, its power needs to be adjusted according to the usage requirements. [0003] At present, one of the power adjustment methods of high-power heaters adopts non-stacked control devices; low-power heating loads have little impact on the power grid, and high-power loads will cause harmonic pollution or impact on the power grid. [0004] Because the traditional stack control scheme still adopts the conduction angle control method, the waveform is destroyed during the control process, so certain harmonics will be generated; figure 1 It is the current waveform diagram under the control of the conduction angle under the control of the lamination layer. The shaded part is the conduction part, and the blank part is the non-conduction part. It can be seen that the waveform has bee...

AI Technical Summary

Problems solved by technology

[0003] At present, one of the power adjustment methods of high-power heaters adopts non-stacked control devices; low-power heating loads have little impact on the power grid, and high-power loads will cause harmonic pollution or impact on the power grid

[0004] Because the traditional stack control scheme still adopts the conduction angle control method, the waveform is destroyed during the control process, so certain harmonics will be generated; figure 1 It is the current waveform diagram under the control of the conduction angle under the control of the lamination layer. The shaded part is the conduction part, and the blank part is the non-conduction part. It can be seen that the waveform has been damaged to varying degrees; resulting in different degrees of Harmonics cause pollution to the power grid. The most direct manifestation is that the power factor is lower than 0.9, which does not meet the electricity standard.

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