CN202424159U

CN202424159U - Transient-overload preventing adapter

Info

Publication number: CN202424159U
Application number: CN2012200658050U
Authority: CN
Inventors: 潘和玉
Original assignee: FOSHAN SHUNDE DISTRICT YANGWEI ELECTRICAL APPLIANCES CO LTD
Current assignee: FOSHAN SHUNDE DISTRICT YANGWEI ELECTRICAL APPLIANCES CO LTD
Priority date: 2012-02-27
Filing date: 2012-02-27
Publication date: 2012-09-05
Anticipated expiration: 2022-02-27

Abstract

The utility model provides a transient-overload preventing adapter, which comprises an EMI (electro-magnetic interference) circuit module, a rectification filtering module, a power converting module, a PWM (pulse-width modulation) controlling module, a voltage outputting module and a voltage stabilizing module. The EMI circuit module is electrically connected with the rectification filtering module, and a voltage dependent resistor is electrically connected with the EMI circuit module at the position of the voltage input port. The voltage dependent resistor is a non-linear over-voltage protecting semiconductor element which is arranged at the position of the input port of the EMI circuit to effectively protect interior circuits of the adapter from being damaged by high voltage.

Description

A kind of anti-transient error adapter

Technical field

The utility model relates to the adapter technique field, relates in particular to a kind of anti-transient error adapter.

Background technology

In daily life, electric equipment products are a feast for the eyes, such as laptop computer or portable torch; And even the every aspect of mobile phone etc.; These electric equipments all have a common ground, are exactly need an adapter auxiliary, through being the high voltage transformation that low-voltage and alternating current become direct current; Make electrical equipment protect the energy-saving effect that also can realize ideal after the electrical equipment in desirable predeterminated voltage value work.

And for electrical appliance or adapter, except the quality of electronic components self or aging and the thunderbolt of the Nature occurs the short circuit; Beyond doubt the moment of electrical appliance is destroyed, serious even occur burning and cause fire, for fear of the destruction of thunderbolt; People are provided with equipment such as lightning rod on building, the extradition thunder and lightning is carried toward underground, but still thunderbolt still can produce certain influence to civil power; The of short duration phenomenon of boosting that comprises voltage, this is harmful and unhelpful for the laptop computer of personal value noble quality, therefore; For the laptop computer that relies on the adapter transformation, the adapter with lightning-arrest function is very important.

Summary of the invention

The utility model provides a kind of anti-transient error adapter; It is provided with piezo-resistance through the place, input port at inductance filter; The transient overvoltage of overvoltage or the switching overvoltage etc. of thunder and lightning is suppressed by piezo-resistance, thereby effectively protect adapter and electrical appliance thereof.

Therefore, the utility model comprises EMI circuit module and rectification filtering module, and said EMI circuit module is electrically connected said rectification filtering module, and the voltage input place of this EMI circuit module is electrically connected a piezo-resistance.

Said piezo-resistance is to be connected in parallel between the live wire and zero line of voltage input.

The beneficial effect of the utility model is that EMI circuit module and rectification filtering module are electrically connected; The voltage input place of said EMI circuit module is electrically connected piezo-resistance; Because piezo-resistance is to be non-linear overvoltage protection semiconductor element, prevent effectively that at the place, input port of EMI circuit high voltage is to inner damage of circuit by this piezo-resistance.

Description of drawings

Fig. 1 is the utility model circuit block diagram.

Fig. 2 is the annexation figure of EMI circuit module described in Fig. 11 and rectification filtering module 2.

Embodiment

As shown in Figure 1; The utility model comprises EMI circuit module 1 and rectification filtering module 2, Power Conversion module 3, PWM control module 4, voltage output module 5 and Voltage stabilizing module 6; Wherein, PWM control module 4 promptly is the pulse width modulation controlled module, and the output of said rectification filtering module 2 is electrically connected the current input terminal of Power Conversion module 3; The output of said Power Conversion module 3 is electrically connected voltage output module 5; The output of said voltage output module 5 is divided into two-way, and wherein one tunnel connection is electrically connected Voltage stabilizing module 6, another Lu Zewei voltage output 51; Said Voltage stabilizing module 6 is electrically connected PWM control module 4, and the output of said PWM control module 4 is electrically connected said Power Conversion module 3.Further; Said EMI circuit module 1 as shown in Figure 2 and rectification filtering module 2; EMI circuit module 1 promptly is the filter circuit of anti-electromagnetic interference; This EMI circuit module 1 is electrically connected said rectification filtering module 2 and constitutes inductance filter, and the voltage input place of this EMI circuit module 1 is electrically connected a piezo-resistance 11, and said piezo-resistance 11 is between the live wire (being the L line) and zero line (being the N line) that is connected in voltage input in parallel.

According to this piezo-resistance 11 is to be non-linear overvoltage protection semiconductor element characteristic, and prevents effectively that at the place, input port of EMI circuit high voltage is to inner damage of circuit by this piezo-resistance 11.

So, when transient overvoltages such as lightning overvoltage and switching overvoltage,, and avoid high voltage that the internal circuit of adapter is destroyed through the regulating action of piezo-resistance.

Claims

1. anti-transient error adapter; Comprise EMI circuit module (1) and rectification filtering module (2); Said EMI circuit module (1) is electrically connected said rectification filtering module (2), it is characterized in that: the voltage input place of said EMI circuit module (1) is electrically connected a piezo-resistance (11).

2. anti-transient error adapter according to claim 1 is characterized in that: said piezo-resistance (11) is to be connected in parallel between the live wire and zero line of voltage input.