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Soft-open electronic switch

An electronic switch and soft opening technology, applied in the electric power field, can solve the problems of large electromagnetic interference and high power consumption, and achieve the effect of small electromagnetic interference, low power consumption, and small load impact.

Active Publication Date: 2018-01-19
广州大中电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention proposes a soft-opening electronic switch to solve the problems of large power consumption and large electromagnetic interference in the soft-opening process of the existing electronic switch

Method used

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Embodiment Construction

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0017] In order to solve the problems of large power consumption and large electromagnetic interference in the soft opening process of the existing electronic switch, the present invention proposes that the power consumption can be reduced.

[0018] figure 1 is a schematic circuit diagram of a soft-on electronic switch according to the present invention. As shown in the figure, the circuit of the soft turn-on electronic switch includes a comparator, a con...

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Abstract

The invention provides a soft-turning-on electronic switch. The switch comprises a comparator, a control switch and an follow current circuit. The comparator generates control signals which comprise pulse signals with the duty ratio from narrow to wide and switching signals keeping at high levels. The control switch is arranged on a positive electrode or negative electrode of an input voltage and is connected with the comparator, and the control switch is turned on with the duty ratio increasing to a complete connecting mode gradually under the control of the control signals. The after-flow circuit is connected with the control switch and provides smoothly rising voltages for a load when the control switch is turned on. The switch is small in impact on load, power consumption and electromagnetic interference.

Description

technical field [0001] The present invention relates to the field of electric power, and in particular, to soft-opening electronic switches. Background technique [0002] Electronic switches are widely used in power control circuits. For example, soft turn-on is very useful in circuits with inductive and capacitive loads. [0003] The existing electronic switch soft-on function generally adopts a linear step-down technology or a duty cycle gradual change control technology. However, the soft-on electronic switch using the linear step-down technology has a large switch voltage drop, resulting in high power consumption and high heat generation of the switch; the soft-on electronic switch using the pulse duty ratio gradual change control technology has a high output voltage during the turn-on process. Frequency pulse, so the electromagnetic interference is large. Contents of the invention [0004] In view of this, the present invention proposes a soft-opening electronic sw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/042
Inventor 刘必成
Owner 广州大中电力技术有限公司
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