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Device for inhibiting impact current

A technology of inrush current and resistance, which is applied in the field of circuits, can solve problems such as excessive inrush current of thyristor dimmers, etc., and achieve the effects of reducing the loss of the first resistance, suppressing inrush current, and suppressing the secondary inrush current

Active Publication Date: 2015-12-09
INVENTRONICS HANGZHOU
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The invention provides a device for suppressing inrush current, which can solve the problem of light flicker caused by abnormal shutdown of the thyristor dimmer due to excessive inrush current when the thyristor dimmer is dimmed with a capacitive load

Method used

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] Such as figure 1 As shown, the present invention provides a device for suppressing inrush current, including a thyristor dimmer 100, a rectifier circuit 200 connected to the output end of the thyristor dimmer, and a rectifier circuit connected to the output end of the rectifier circuit capacitive load 300, also includes:

[0050] a first resistor 400 connected in series between the rectifier circuit 200 and the capacitive load 300;

[0051] A switch t...

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Abstract

The present invention provides a device for inhibiting impact current. The device comprises a thyristor dimmer, a rectifier circuit, a capacitive load, a first resistor, a switch tube, a control unit and a regulation unit. The control unit can switch off the switch tube when a thyristor is switched on, in the conduction phase angle after the switch-on of the thyristor dimmer, the switch tube is switched on such that the resistor is in short circuit, and the switch-on speed of the switch tube is reduced through the regulation unit. Thus according to the device, the impact current brought to capacitive load by the dimming of the thyristor dimmer and the secondary impact current brought to the capacitive load by the switch-on of the switch tube can be inhibited, and the loss of the first resistor can be reduced as much as possible while the impact current is inhibited.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a device for suppressing surge current. Background technique [0002] In traditional applications, thyristor dimmers are generally used for dimming incandescent lamps. The incandescent lamp is equivalent to a resistive load, and the dimming effect is good when the two are used together. When the thyristor dimmer has a capacitive load, when the sudden change in input voltage acts on the capacitive load, a large inrush current will be brought, and the impulse current oscillates between the thyristor dimmer and the capacitive load. When the impulse current oscillates below the holding current of the thyristor dimmer, it will cause the thyristor dimmer to shut down abnormally and cause the light to flicker. [0003] Therefore, a device is needed now to solve the problem of light flicker caused by abnormal shutdown of the thyristor dimmer due to excessive inrush current when the thy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H02H9/02
Inventor 罗世伟徐雁
Owner INVENTRONICS HANGZHOU
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