CN211127137U - Direct current power supply positive and negative polarity universal device and charging equipment - Google Patents
Direct current power supply positive and negative polarity universal device and charging equipment Download PDFInfo
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- CN211127137U CN211127137U CN201922292586.4U CN201922292586U CN211127137U CN 211127137 U CN211127137 U CN 211127137U CN 201922292586 U CN201922292586 U CN 201922292586U CN 211127137 U CN211127137 U CN 211127137U
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Abstract
The utility model provides a DC power supply positive and negative polarity universal device and charging equipment, which comprises an input end, an output end and a protection circuit, wherein the input end and the output end are connected through the protection circuit, the input end at least comprises two input terminals, and the output end at least comprises two output terminals; the protection circuit is configured to judge according to the input polarities of the two input terminals and regulate and control the positive and negative poles of the two output terminals according to the difference of the input polarities. The direct-current power supply can be suitable for positive and negative polarities, and electronic device breakdown caused by the fact that equipment is turned on or off reversely can not be caused.
Description
Technical Field
The utility model belongs to the new forms of energy are filled and are traded electric, little electric wire netting control and direct current distribution field, relate to a DC power supply positive negative polarity universal device and battery charging outfit.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The non-polar input of the DC power supply means that the DC power supply has no difference between the positive and negative poles in the power system. Dc power supplies are widely used in power systems. While a non-polar power supply allows both voltage directions to be used. Therefore, a non-polar power supply is better than a polar power supply in terms of voltage direction alone.
At present, in the new energy charging and battery replacement and microgrid control industry, a power supply method of a direct current power supply mainly adopts a single input power supply with positive and negative polarities. The disadvantages brought by the power supply mode are as follows: once the positive and negative polarities are reversed, most devices are hung up, and the polar plates are burnt out if the batteries are reversely connected. If the electronic equipment is connected reversely, the components such as a diode, a triode, an integrated block, a thyristor, a direct current capacitor and the like can be subjected to reverse large-current breakdown.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, provided a DC power supply positive negative polarity universal device and battery charging outfit, the utility model discloses can realize that DC power supply positive negative polarity can all be suitable for, can not cause the electronic device breakdown of some equipment when switching on reversely.
According to some embodiments, the utility model adopts the following technical scheme:
a kind of direct current power positive and negative polarity universal device, including input end, carry-out terminal and protective circuit, the input end, carry-out terminal are connected through double or multiple protective circuit, wherein, the said input end includes two input terminals at least, the said carry-out terminal includes two output terminals at least;
the protection circuit is configured to judge according to the input polarities of the two input terminals and regulate and control the positive and negative poles of the two output terminals according to the difference of the input polarities. The middle part is not provided with any inverter circuit, and the reliability of zero voltage drop is highest. The direct current power supply can be suitable for positive and negative polarities, and electronic device breakdown caused by the fact that equipment is touched reversely can not be caused.
As an alternative embodiment, the protection circuit comprises an input protection circuit arranged between the two input terminals, and an output protection circuit arranged between the two output terminals, and a selection circuit between the input protection circuit and the output protection circuit. Through setting up double protection circuit, improved the reliability of circuit.
As an alternative embodiment, the protection circuit specifically includes two diodes disposed in a forward relative series connection between the first input terminal and the second input terminal, and a relay, a third contact of the relay is connected to the first input terminal, a sixth contact is connected to the second input terminal, and the second contact and the fifth contact are grounded to the first inductor; the fourth contact and the seventh contact are connected to the first output terminal through the common-mode inductor, the first contact and the eighth contact are respectively connected to two ends of the diode, and the relay coil is electrified when the first contact and the eighth contact are electrified.
The two terminals of the input terminal are referred to as a first input terminal and a second input terminal, and in general, the first input terminal is a positive voltage and the second input terminal is a negative voltage, and if the terminals are connected in reverse, the second input terminal is a positive voltage and the first input terminal is a negative voltage, and the output terminal is directly connected to an electronic component to be powered, and the polarity is fixed.
The utility model discloses a protection circuit's design has guaranteed:
when the first input terminal inputs a positive voltage, the second input terminal inputs a negative voltage. The direct current power supply passes through a diode and a JDQ coil, the coil is electrified, the normally closed contact is disconnected, the normally open contact is closed, the fourth contact and the fifth contact of the relay are electrified, the fourth contact is positive voltage, and the fifth contact is negative voltage, namely, the positive end of the power supply and the negative end of the power supply.
When the second input terminal inputs a positive voltage and the first input terminal inputs a negative voltage, the coil of the relay is not electrified because the diode is at a low potential, and the relay does not act. The power is directly output from the common contact to the normally closed contact, and the positive end and the negative end of the power are also ensured. The middle part does not pass through a complex switching circuit, and the power supply voltage is smoothly output without loss.
As a further limitation, a voltage stabilizing resistor is connected between the first input terminal and the second input terminal. The combination of the transient suppression diode, the Zener diode and the capacitor can be replaced, the IC and other equipment can be protected, and damage to the IC and other equipment caused by electrostatic discharge, surge, transient large current (such as lightning stroke) and the like can be prevented;
the voltage stabilizing resistor is arranged at the front stage of the protection circuit and is connected with the protection circuit in parallel.
By way of further limitation, two piezoresistors connected in series are further connected between the first input terminal and the second input terminal, and the central points of the two piezoresistors are grounded through the gas discharge tube. Preventing the generation of a follow current problem.
The piezoresistor is arranged at the front stage of the protection circuit and is connected with the protection circuit in parallel, so that the insulativity between the positive pole and the negative pole of the power supply is reliably ensured.
By way of further limitation, a first inductor and a first capacitor are connected between the second contact and the fourth contact, and the first inductor and the first capacitor are connected in series.
As a further limitation, an aluminum electrolytic capacitor for filtering noise and ac components of the output power supply and smoothing pulsating dc voltage is connected between the two output terminals.
A charging device comprises the direct current power supply positive and negative polarity universal device. Power is supplied to other devices.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses control power source uses the direct current, then after normal operating power source interrupt, the supply control circuit that battery power source can not have the interrupt, does not have the switching time in the centre, also does not have the transform circuit through any contravariant class, and the reliability is the highest.
The utility model discloses even if the voltage polarity of input has connect conversely, utilize protection circuit, can not cause the reverse heavy current breakdown of component yet, need not consider the polarity problem when DC power supply input, and the output voltage loss is low, simple and convenient safety.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a detailed circuit diagram of the present embodiment;
fig. 3 is an operation schematic diagram of the present invention.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
As shown in fig. 1, the principle of the present invention is: a direct current power supply positive and negative polarity universal device comprises an input end, an output end and a protection circuit, wherein the input end and the output end are connected through the protection circuit, the input end at least comprises two input terminals, and the output end at least comprises two output terminals;
the protection circuit is configured to judge according to the input polarities of the two input terminals and regulate and control the positive and negative poles of the two output terminals according to the difference of the input polarities.
As an alternative embodiment, the protection circuit comprises an input protection circuit arranged between the two input terminals, and an output protection circuit arranged between the two output terminals, and a selection circuit between the input protection circuit and the output protection circuit.
As shown in fig. 2 and fig. 3, as a typical embodiment, a device for common positive and negative polarities of a dc power supply is described, for convenience of description, two terminals of an input terminal are referred to as an a terminal and a B terminal, in general, the a terminal is a positive voltage, the B terminal is a negative voltage, if reversed, the B terminal is a positive voltage, the a terminal is a negative voltage, and the output terminal is directly connected to an electronic component to be powered, and the polarity is fixed.
When the A terminal inputs 24V + and the B terminal inputs 24V-. The direct current power supply passes through diode D1, relay JDQ coil, and the relay is direct current 24 relay, double-pole double-throw relay. When the coil is electrified, the normally closed contact is disconnected, and the normally open contact is closed. The JDQ-4 and JDQ-5 contacts of the relay are electrified, the contact 4 is 24V positive, the contact 5 is 24V negative, namely the anode of the power supply at the end C, and the end D is the cathode.
When the terminal B inputs positive 24V, the terminal A inputs negative 24V. Since the a pole of D1 is low, the JDQ coil does not get energized. The relay JDQ does not act. The power is directly output from the common contact to the normally closed contact, the end C is the positive electrode of the power, and the end D is the negative electrode of the power.
In conclusion, no matter how the input end A, B is connected to the power supply, the output end always outputs a fixed single polarity, that is, the end C is the positive electrode of the power supply, and the end D is the negative electrode of the power supply.
Meanwhile, in some embodiments, the protection can be performed by a piezoresistor common-mode choke coil T1, and EMC experiments such as common-mode differential mode surge and the like are mainly prevented.
In some embodiments, voltage limiting protection is performed by using a voltage dependent resistor MY1-MY 3. The voltage dependent resistor is a resistor device with nonlinear volt-ampere characteristic, and is a voltage limiting type protection device. The working principle is as follows: when the voltage across the varistor exceeds its threshold, the current flowing through it increases sharply, corresponding to a resistance of infinitesimal magnitude. When the voltage applied to the varistor is below its threshold value, the current flowing through it is extremely small, corresponding to a resistance of infinite value. The voltage dependent resistor can clamp the voltage to a relatively fixed voltage value, thereby realizing the protection of the post-stage circuit.
In some embodiments, a gas discharge tube DS1 is connected between the voltage dependent resistor MY2 and the voltage dependent resistor MY3, and is commonly used in the first or former two stages of a multi-stage protection circuit to discharge lightning transient overcurrent and limit overvoltage.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (10)
1. A DC power supply positive and negative polarity universal device is characterized in that: the circuit comprises an input end, an output end and a protection circuit, wherein the input end and the output end are connected through a double or multiple protection circuit, the input end at least comprises two input terminals, and the output end at least comprises two output terminals;
the protection circuit is configured to judge according to the input polarities of the two input terminals and regulate and control the positive and negative poles of the two output terminals according to the difference of the input polarities.
2. The apparatus as claimed in claim 1, wherein the apparatus comprises: the protection circuit includes a dual protection circuit disposed between two input terminals and two output terminals, and a selection circuit between the input protection circuit and the output protection circuit.
3. The apparatus as claimed in claim 1, wherein the apparatus comprises: the protection circuit includes two diodes and a relay arranged in forward relative series between a first input terminal and a second input terminal.
4. The device as claimed in claim 3, wherein the device comprises: when the first input terminal inputs positive voltage, the second input terminal inputs negative voltage, the direct current power supply passes through the diode and the relay coil, the coil is electrified, the normally closed contact is disconnected, the normally open contact is closed, the fourth contact and the fifth contact of the relay are electrified, the fourth contact is positive voltage, and the fifth contact is negative voltage.
5. The device as claimed in claim 3, wherein the device comprises: when the second input terminal inputs a positive voltage and the first input terminal inputs a negative voltage, the coil of the relay is not electrified because the diode is at a low potential, and the relay does not act.
6. The device as claimed in claim 3, wherein the device comprises: a voltage stabilizing resistor is also connected between the first input terminal and the second input terminal;
or further, the voltage stabilizing resistor is arranged at the front stage of the protection circuit and is connected with the protection circuit in parallel.
7. The device as claimed in claim 3, wherein the device comprises: two piezoresistors connected in series are further connected between the first input terminal and the second input terminal, and the central points of the two piezoresistors are grounded through a gas discharge tube;
or further, the piezoresistor is arranged at the front stage of the protection circuit and is connected with the protection circuit in parallel.
8. The device as claimed in claim 3, wherein the device comprises: the second contact and the fourth contact of the relay are also connected with a first inductor and a first capacitor in series, the inductor is equivalent to a short circuit in a normally working direct current circuit, at the moment of circuit connection, the current starts to change from 0 to i, but the currents at two ends of the inductance coil cannot change suddenly, the inductance delay protection effect is achieved to a certain extent, and the first capacitor has a considerable buffer protection effect on the voltage of the circuit.
9. The device as claimed in claim 3, wherein the device comprises: an aluminum electrolytic capacitor is connected between the first output terminal and the second output terminal.
10. A charging device is characterized in that: the direct-current power supply positive and negative polarity universal device comprises the direct-current power supply positive and negative polarity universal device as claimed in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922292586.4U CN211127137U (en) | 2019-12-18 | 2019-12-18 | Direct current power supply positive and negative polarity universal device and charging equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922292586.4U CN211127137U (en) | 2019-12-18 | 2019-12-18 | Direct current power supply positive and negative polarity universal device and charging equipment |
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| CN211127137U true CN211127137U (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022242222A1 (en) * | 2021-05-21 | 2022-11-24 | 胡汉坚 | Method and apparatus for prolonging service life of ceramic electric heating body under direct-current power supply condition |
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2019
- 2019-12-18 CN CN201922292586.4U patent/CN211127137U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022242222A1 (en) * | 2021-05-21 | 2022-11-24 | 胡汉坚 | Method and apparatus for prolonging service life of ceramic electric heating body under direct-current power supply condition |
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Effective date of registration: 20201214 Address after: Room 902, 9 / F, block B, Yinhe building, 2008 Xinluo street, hi tech Zone, Jinan City, Shandong Province Patentee after: Shandong Luneng Software Technology Co.,Ltd. intelligent electrical branch Address before: 250101 power intelligent robot production project 101 south of Feiyue Avenue and east of No.26 Road (in ICT Industrial Park) in Suncun District of Gaoxin, Jinan City, Shandong Province Patentee before: National Network Intelligent Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 902, 9 / F, block B, Yinhe building, 2008 Xinluo street, hi tech Zone, Jinan City, Shandong Province Patentee after: Shandong luruan Digital Technology Co.,Ltd. smart energy branch Address before: Room 902, 9 / F, block B, Yinhe building, 2008 Xinluo street, hi tech Zone, Jinan City, Shandong Province Patentee before: Shandong Luneng Software Technology Co.,Ltd. intelligent electrical branch |