CN202495749U - Power source protection circuit - Google Patents
Power source protection circuit Download PDFInfo
- Publication number
- CN202495749U CN202495749U CN201120539115XU CN201120539115U CN202495749U CN 202495749 U CN202495749 U CN 202495749U CN 201120539115X U CN201120539115X U CN 201120539115XU CN 201120539115 U CN201120539115 U CN 201120539115U CN 202495749 U CN202495749 U CN 202495749U
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- circuit
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- protection circuit
- transient voltage
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Abstract
The utility model relates to a power source protection circuit, comprising an inductive high-voltage protection circuit and a dc source polarity protection circuit. Said inductive high-voltage protection circuit comprises at least one voltage dependent resistor RT and at least two transient voltage suppressors TVS1 and TVS2, wherein the voltage dependent resistor RT is parallel connected in the input side of the circuit, at least one transient voltage suppressor TVS1 is parallel connected in the input side of the circuit, at least one transient voltage suppressor TVS2 is parallel connected in the output side of the circuit, and the transient voltage suppressor TVS2 is in parallel connection with a capacitor C. Said dc source polarity protection circuit comprises a dc solid-state relay RS1, a diode D1, a diode D2, and a voltage dropping resistor R, wherein a positive terminal of the circuit input side and a positive terminal of the circuit output side are connected with normally open contacts of the dc solid-state relay RS1. The power source protection circuit of the utility model ensures correct connection of input source polarity, is low in power consumption and high in reliability, and effectively protects precision components in the internal circuit, thereby ensuring that devices in an automatic control system can work normally and reliably.
Description
Technical field
The utility model relates to a kind of power protecting circuit, is specifically related to a kind of have DC power supply polarity protection and the circuit of responding to high voltage protective.
Background technology
In the prior art, power protecting circuit uses voltage stabilizing didoe, causes power consumption too big, can not realize big Current Control.Owing to there is not high voltage protection circuit, circuit receives the damage of various surge pulses easily simultaneously.When user's electric power polarity connects inverse time accidentally, the precision components in will badly damaged electronic circuit causes the damage of main equipment.
The utility model content
The deficiency that the utility model exists to prior art just provides a kind of power protecting circuit.
The utility model adopts following technological means to solve the problems of the technologies described above: a kind of power protecting circuit; Comprise induction high tension protection circuit and DC power supply polar protective circuit; Said induction high tension protection circuit comprises at least one piezo-resistance RT and at least two Transient Voltage Suppressor TVS1, TVS2; Piezo-resistance RT is connected in parallel on the circuit input side; At least one Transient Voltage Suppressor TVS1 is connected in parallel on the circuit input side, and at least one Transient Voltage Suppressor TVS2 is connected in parallel on the circuit outlet side, Transient Voltage Suppressor TVS2 shunt capacitance C; Said DC power supply polar protective circuit comprises dc solid-state relay RS1, diode D1 and diode D2 and dropping resistor R, and described circuit input side positive terminal, circuit outlet side positive terminal link to each other with dc solid-state relay RS1 normally opened contact.
Said diode D1 connects with dropping resistor R, the anode connection circuit power cathode input DC-of diode D1, and dropping resistor R links to each other with the cathode output end of dc solid-state relay RS1; The cathode output end of said dc solid-state relay RS1 connects the anode of diode D2, the minus earth of diode D2.
The beneficial effect of the utility model is: the utility model has realized that a kind of little current circuit protects high-current circuit, and it is low in energy consumption, and reliability is high.The said power protecting circuit of the utility model is guaranteed the correct connection of its input electric power polarity, effectively protects the precision components in the internal circuit, thereby guarantees the equipment normal reliable operation in the automatic control system.
Description of drawings
Fig. 1 is the described power protecting circuit figure of the utility model.
Embodiment
To combine concrete embodiment that the content of the utility model is described below.
As shown in Figure 1, be the described power protecting circuit figure of the utility model.The described power protecting circuit of the utility model left side is an input side, and the right side is an outlet side.Described power protecting circuit comprises induction high tension protection circuit and DC power supply polar protective circuit.Said induction high tension protection circuit comprises at least one piezo-resistance RT and at least two Transient Voltage Suppressor TVS1, TVS2; Piezo-resistance RT is connected in parallel on the circuit input side; Transient Voltage Suppressor TVS1 is connected in parallel on the circuit input side, and Transient Voltage Suppressor TVS2 is connected in parallel on the circuit outlet side, Transient Voltage Suppressor TVS2 shunt capacitance C.
Said DC power supply polar protective circuit comprises dc solid-state relay RS1, diode D1, diode D2 and dropping resistor R.Diode D1 connects with dropping resistor R, the anode connection circuit power cathode input DC-of diode D1, and dropping resistor R links to each other with the cathode output end of dc solid-state relay RS1.The cathode output end of dc solid-state relay RS1 connects the anode of diode D2, the minus earth of diode D2.
Described circuit input side positive terminal DC+, circuit outlet side positive terminal link to each other with dc solid-state relay RS1 normally opened contact; Make input, output end voltage be positioned at a predetermined value; Protective circuit avoids charging into the infringement of voltage; Precision components in the protective circuit is avoided the damage of various inductions effectively.
When the input terminal voltage error-polarity connection, dc solid-state relay RS1 does not work, and has then formed not the loop, the not adhesive of contact of dc solid-state relay RS1, and entire circuit opens circuit.Otherwise when dc solid-state relay RS1 conducting, circuit turn-on correctly connects with this polarity of guaranteeing its input power supply like this.
Claims (2)
1. power protecting circuit; It is characterized in that, comprise induction high tension protection circuit and DC power supply polar protective circuit, said induction high tension protection circuit comprises at least one piezo-resistance RT and at least two Transient Voltage Suppressor TVS1, TVS2; Piezo-resistance RT is connected in parallel on the circuit input side; At least one Transient Voltage Suppressor TVS1 is connected in parallel on the circuit input side, and at least one Transient Voltage Suppressor TVS2 is connected in parallel on the circuit outlet side, Transient Voltage Suppressor TVS2 shunt capacitance C; Said DC power supply polar protective circuit comprises dc solid-state relay RS1, diode D1 and diode D2 and dropping resistor R, and described circuit input side positive terminal, circuit outlet side positive terminal link to each other with dc solid-state relay RS1 normally opened contact.
2. a kind of power protecting circuit as claimed in claim 1 is characterized in that, said diode D1 connects with dropping resistor R, the anode connection circuit power cathode input DC-of diode D1, and dropping resistor R links to each other with the cathode output end of dc solid-state relay RS1; The cathode output end of said dc solid-state relay RS1 connects the anode of diode D2, the minus earth of diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120539115XU CN202495749U (en) | 2011-12-21 | 2011-12-21 | Power source protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120539115XU CN202495749U (en) | 2011-12-21 | 2011-12-21 | Power source protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202495749U true CN202495749U (en) | 2012-10-17 |
Family
ID=47001961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120539115XU Expired - Fee Related CN202495749U (en) | 2011-12-21 | 2011-12-21 | Power source protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202495749U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420419A (en) * | 2011-12-21 | 2012-04-18 | 铜陵浩岩节能科技有限公司 | Power protection circuit |
| CN113207205A (en) * | 2021-04-13 | 2021-08-03 | 上海交通大学 | Microwave protection circuit based on transient voltage suppressor |
-
2011
- 2011-12-21 CN CN201120539115XU patent/CN202495749U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420419A (en) * | 2011-12-21 | 2012-04-18 | 铜陵浩岩节能科技有限公司 | Power protection circuit |
| CN113207205A (en) * | 2021-04-13 | 2021-08-03 | 上海交通大学 | Microwave protection circuit based on transient voltage suppressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TONGLING XINSHENGYUAN INDUSTRY TECHNOLOGY CO., LTD Free format text: FORMER OWNER: TONGLING HAIYAN ENERGY SAVING TECHNOLOGY CO., LTD. Effective date: 20131011 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131011 Address after: 244000 Anhui branch of Tongling Development Zone, USTC Patentee after: Tongling Xinshengyuan Industry Technology Co.,Ltd. Address before: 244000 No. 216, building B, hi tech Innovation Service Center, Anhui, Tongling Patentee before: Tongling Haoyan Energy-saving Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20141221 |
|
| EXPY | Termination of patent right or utility model |