CN203415950U - Electricity-using device input soft start resistor protection circuit - Google Patents
Electricity-using device input soft start resistor protection circuit Download PDFInfo
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- CN203415950U CN203415950U CN201320496868.6U CN201320496868U CN203415950U CN 203415950 U CN203415950 U CN 203415950U CN 201320496868 U CN201320496868 U CN 201320496868U CN 203415950 U CN203415950 U CN 203415950U
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- soft start
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- power consumption
- consumption equipment
- protection circuit
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Abstract
The utility model discloses two types of electricity-using device input soft start resistor protection circuits. A soft start switch is arranged between an electricity-using device and an input power supply. The electricity-using device input soft start resistor protection circuit comprises a relay. Two normally open contact points of the relay are respectively connected with the power supply end and the electricity-using device end. A control signal controls a coil of the relay so that the two normally open contact points are contacted, and thus the soft switch is closed. A soft start resistor is arranged between the two normally open contact points. One type of the protection circuit is arranged between the two normally open contact points. The electricity-using device input soft start resistor protection circuit also comprises a high-molecular polymer positive coefficient temperature resistor which is connected in series with the soft start resistor. In the other type of the electricity-using device input soft start resistor protection circuit, the soft start resistor is the high-molecular polymer positive coefficient temperature resistor. Therefore, damage to the device under the abnormal situation is reduced to the largest extent, and the soft start resistor is not damaged or replaced. Besides, a PPTC has a self-recovery characteristic so that the device can be recovered to the normal state to work after the abnormal situation is eliminated.
Description
Technical field
The utility model relates to circuit protection field, particularly a kind of protective circuit of power consumption equipment input soft start resistance.
Background technology
At present, the requirement of the input impulse current of a lot of power consumption equipments during to opening device is more and more higher, too high input impulse current in the time of will requiring to suppress opening device by soft starting circuit.In the scheme of soft starting circuit, just need to there is soft start resistance that input impulse current is suppressed in the scope of demand, and on soft start resistance and succeed electrical equipment control relay normally open contact closure and eliminate the loss that soft start resistance produces when equipment works.Common soft starting circuit as shown in Figure 1 and Figure 2, when power consumption equipment is opened, too high input impulse current while utilizing soft start resistance R to suppress opening device, after soft start-up process, the closed normally opened contact of control relay K makes soft start resistive short eliminate loss.The problem of sort circuit is, power supply VCC and the control signal control of relay K are provided by power consumption equipment self, when unit exception, there will be 4 kinds of abnormal conditions to make relay disconnect inefficacy normally closed normal battle: 1) control signal control loses, 2) power supply VCC loses, 3) temperature rise of relay electromagnetic wire bag is too high; 4) the most extreme situation is exactly rear class load short circuits, cause without power supply VCC without control signal control, above-mentioned several relays that extremely make disconnect after inefficacy normally closed normal battle, the operating current that equipment is all or short circuit current all can be directly by soft start resistance access input circuits, thereby produce, be far longer than the power consumption that soft start resistance can bear, make the very fast intensification of resistance, until explosion open circuit or catching fire open circuit, and then burn out the miscellaneous equipment parts that close on, serious also can cause fire.
Utility model content
The utility model provides in order to overcome in prior art in soft starting circuit soft start resistance and lost efficacy or the very fast intensification of resistance during the short circuit of rear class load circuit at relay, until a kind of power consumption equipment input soft start resistance protection circuit of the problem of explosion open circuit or catching fire open circuit.
The utility model solves the technical scheme that its technical problem adopts: a kind of power consumption equipment input soft start resistance protection circuit, described soft start switch is arranged between power consumption equipment and input power, comprise relay, two normally opened contacts of described relay connect respectively power end and power consumption equipment end, it is closed that the coil of control signal control relay makes two normally opened contact contacts realize soft switch, and soft start resistance is arranged between two described normally opened contacts; Between two described normally opened contacts, also comprise the high molecular polymer positive coefficient temperature and resistance of connecting with described soft start resistance.
Further, in above-mentioned power consumption equipment input soft start resistance protection circuit: described input power is DC power supply, and described soft start switch is arranged between described DC power anode and power consumption equipment.
Further; in above-mentioned power consumption equipment input soft start resistance protection circuit: between two described normally opened contacts; also comprise the anti-reverse diode of input; the anti-reverse diode of described input and high molecular polymer positive coefficient temperature and resistance and soft start resistance series winding, the anode of the described anti-reverse diode of input connects power supply direction.
The utility model also provides another power consumption equipment input soft start resistance protection circuit, described soft start switch is arranged between power consumption equipment and input power, comprise relay, two normally opened contacts of described relay connect respectively power end and power consumption equipment end, it is closed that the coil of control signal control relay makes two normally opened contact contacts realize soft switch, and soft start resistance is arranged between two described normally opened contacts; Described soft start resistance is high molecular polymer positive coefficient temperature and resistance.
Further, in above-mentioned power consumption equipment input soft start resistance protection circuit: described input power is DC power supply, and described soft start switch is arranged between described DC power anode and power consumption equipment.
Further; in above-mentioned power consumption equipment input soft start resistance protection circuit: between two described normally opened contacts; also comprise the anti-reverse diode of input; the anti-reverse diode of described input and described soft start resistance series winding, the anode of the described anti-reverse diode of input connects power supply direction.
The utility model provides a kind of protective circuit of power consumption equipment input soft start resistance, this circuit utilizes high molecular polymer positive coefficient temperature and resistance to contact as soft start resistance or with soft start resistance, can guarantee that rear class load short circuits or relay utilized the high temperature of overload current or the generation of soft start resistance to disconnect the current circuit of rear class load while losing efficacy disconnection normally opened contact, remove the explosion of soft start resistance overload high temperature, play the security incident hidden danger of baked wheaten cake circuit board or other parts, and can when unit exception, avoid problem to expand, farthest reduce impaired in unit exception situation, soft start resistance can impairedly not changed.And PPTC has from recovery characteristics, so can automatically recover normal operation after abnormal the eliminating.
Below with reference to drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is the power consumption equipment soft starting circuit schematic diagram of AC power supply in prior art.
Fig. 2 is the power consumption equipment soft starting circuit schematic diagram of DC power supply in prior art.
Fig. 3 is that the AC of the utility model embodiment 1 is for the protective circuit schematic diagram of soft starting resistance.
Fig. 4 is that the DC of the utility model embodiment 2 is for the protective circuit schematic diagram of soft starting resistance.
Embodiment
Embodiment 1; as shown in Figure 3: the present embodiment is the soft start resistance protection circuit in AC power supply device; in this circuit, soft start switch is arranged on the L end of power input line as shown in Figure 3; namely on usual said live wire; in the present embodiment, soft start switch is a relay K of being controlled by control signal; under control signal is controlled; now; VCC and Control form loop, have electric current to flow through, now in the coil of relay K; relay adhesive; two contacts of this relay just connect, and now switch is closed, and power consumption equipment obtains power supply and starts working.When there is no control signal, two contacts isolate mutually, are called normally opened contact.Soft start resistance R is arranged between two normally opened contacts; for soft start resistance R is protected; between two normally opened contacts, be also provided with high molecular polymer positive coefficient temperature and resistance PPTC; soft start resistance R, high molecular polymer positive coefficient temperature and resistance PPTC first connect; then the two ends after series connection are succeeded respectively to two normally opened contacts of electrical equipment, namely connect respectively power supply input line and equipment input line.
Here, when relay K is because the reason that can not expect has been damaged, here; between the input supply terminal of power consumption equipment and the L of power supply end, by the electric current having, now, temperature intersection raises; the resistance value of high molecular polymer positive coefficient temperature and resistance PPTC will increase, and soft start resistance is protected.
Here PPTC is the abbreviation of English word: Polyer Positive Temperature coefficient, the Chinese meaning is: high molecular polymer positive coefficient temperature and resistance, that is: high molecular positive temp thermistor.The product contrary with PTC be NTC: Negative temperature Coefficient negative temperature coefficient thermistor.Electronic overcurrent/overvoltage protection industry at home, idiom calls resettable fuse PPTC.Secondary cell overcurrent protection sheet; also be the idiom of domestic electron trade, because the outer very thin rectangle chewing gum of image a slice of overcurrent protection sheet for battery, its material both sides are nickel straps of welding; centre is polymer macromolecular structure, is hereat called battery overcurrent protection sheet PPTC.Poly Switch high molecular polymer switch is also the another kind of address of PPTC.
Embodiment 2, as shown in Figure 4: the present embodiment is used between direct-flow electricity utilization apparatus and DC power supply, as shown in Figure 4, also have the present embodiment different from embodiment 1 also comprise one for inputting anti-reverse diode D, high molecular polymer positive coefficient temperature and resistance PPTC first connects with soft start resistance R, diode D, then the two ends after series connection are succeeded respectively to two normally opened contacts of electrical equipment, namely connect respectively power supply input line (DC+) and equipment input line (LOAD+), diode cathode connects equipment input line (LOAD+).
Embodiment 3, the present embodiment and embodiment 1 is different with embodiment 2 above, soft switch resistance itself adopts PPTC, like this; because the input impulse current time is shorter; temperature can not raise, still, and after relay itself damages; operating current or short circuit current will be tided over PPTC; when crossing after a period of time, temperature will raise, according to the feature of PPTC; will, as the connection of cutting off fuse between power consumption equipment and power supply, protect.
Claims (6)
1. a power consumption equipment is inputted soft start resistance protection circuit, described soft start switch is arranged between power consumption equipment and input power, comprise relay, two normally opened contacts of described relay connect respectively power end and power consumption equipment end, it is closed that the coil of control signal control relay makes two normally opened contact contacts realize soft switch, and soft start resistance is arranged between two described normally opened contacts; It is characterized in that: between two described normally opened contacts, also comprise the high molecular polymer positive coefficient temperature and resistance of connecting with described soft start resistance.
2. power consumption equipment input soft start resistance protection circuit according to claim 1, is characterized in that: described input power is DC power supply, and described soft start switch is arranged between described DC power anode and power consumption equipment.
3. power consumption equipment according to claim 2 is inputted soft start resistance protection circuit; it is characterized in that: between two described normally opened contacts; also comprise the anti-reverse diode of input; the anti-reverse diode of described input and high molecular polymer positive coefficient temperature and resistance and soft start resistance series winding, the anode of the described anti-reverse diode of input connects power supply direction.
4. a power consumption equipment is inputted soft start resistance protection circuit, described soft start switch is arranged between power consumption equipment and input power, comprise relay, two normally opened contacts of described relay connect respectively power end and power consumption equipment end, it is closed that the coil of control signal control relay makes two normally opened contact contacts realize soft switch, and soft start resistance is arranged between two described normally opened contacts; It is characterized in that: described soft start resistance is high molecular polymer positive coefficient temperature and resistance.
5. power consumption equipment input soft start resistance protection circuit according to claim 4, is characterized in that: described input power is DC power supply, and described soft start switch is arranged between described DC power anode and power consumption equipment.
6. power consumption equipment according to claim 5 is inputted soft start resistance protection circuit; it is characterized in that: between two described normally opened contacts; also comprise the anti-reverse diode of input; the anti-reverse diode of described input and described soft start resistance series winding, the anode of the described anti-reverse diode of input connects power supply direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320496868.6U CN203415950U (en) | 2013-08-15 | 2013-08-15 | Electricity-using device input soft start resistor protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320496868.6U CN203415950U (en) | 2013-08-15 | 2013-08-15 | Electricity-using device input soft start resistor protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203415950U true CN203415950U (en) | 2014-01-29 |
Family
ID=49978809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320496868.6U Expired - Lifetime CN203415950U (en) | 2013-08-15 | 2013-08-15 | Electricity-using device input soft start resistor protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203415950U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921286A (en) * | 2017-04-01 | 2017-07-04 | 上海紫通信息科技有限公司 | Distribution line failure simulation system power supply circuit |
| CN107979269A (en) * | 2017-11-08 | 2018-05-01 | 珠海格力电器股份有限公司 | overcurrent protection circuit |
| CN110022053A (en) * | 2019-03-29 | 2019-07-16 | 合肥华耀电子工业有限公司 | It is a kind of to inhibit the three phase rectifier of function to protect circuit with inrush current |
-
2013
- 2013-08-15 CN CN201320496868.6U patent/CN203415950U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921286A (en) * | 2017-04-01 | 2017-07-04 | 上海紫通信息科技有限公司 | Distribution line failure simulation system power supply circuit |
| CN107979269A (en) * | 2017-11-08 | 2018-05-01 | 珠海格力电器股份有限公司 | overcurrent protection circuit |
| CN110022053A (en) * | 2019-03-29 | 2019-07-16 | 合肥华耀电子工业有限公司 | It is a kind of to inhibit the three phase rectifier of function to protect circuit with inrush current |
| CN110022053B (en) * | 2019-03-29 | 2024-03-29 | 合肥华耀电子工业有限公司 | Three-phase rectification protection circuit with input surge current suppression function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 Floors 1-3 and 1-5 of Block A, Block B2, Jinweiyuan Industrial Plant, Longshan District, Pingshan New District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN GOLD POWER TECHNOLOGY Co.,Ltd. Address before: 518000 First, Second and Fifth Floors of B2 Workshop of Fengyeyuan Industrial Plant, Liuxian Second Road, Baocheng 68 District, Baoan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN GOLD POWER TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |