CN105486968A - DC input power reverse connection prevention device - Google Patents
DC input power reverse connection prevention device Download PDFInfo
- Publication number
- CN105486968A CN105486968A CN201510700649.9A CN201510700649A CN105486968A CN 105486968 A CN105486968 A CN 105486968A CN 201510700649 A CN201510700649 A CN 201510700649A CN 105486968 A CN105486968 A CN 105486968A
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- power
- direct current
- circuit
- reverse
- power lead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention relates to a DC input power reverse connection prevention device, comprising a DC 600V switching-on indication circuit, a DC 600V reverse connection prevention circuit, a 600V+ power line, a 600V- power line, a DC 110V switching-on indication circuit, a DC 110V reverse connection prevention circuit, a 110V+ power line, and a 110V- power line. Through on-off of a light emitting diode, circuit switching-on conditions are indicated, and the light emitting diode is used as a warning lamp of an electrified region. If positive and negative wiring of a power supply is correct, the light emitting diode is illuminated, a MOS tube is switched on, and a three-phase inverter is electrified and can normally test. If the positive and negative wires of the power supply are connected reversely, the light emitting diode goes out, the MOS tube protects and the circuit cannot be switched on. After power failure, the incorrect wiring is corrected in time, and the test is recovered. In the device, the MOS tube is used to replace an ordinary anti-reverse diode, thereby greatly reducing loss, and prolonging service life. The MOS tube adapts to various kinds of voltage classes, so the device is expanded to be used in debugging of other electrical products.
Description
Technical field
The present invention relates to trolley coach three-phase inverter field tests, specifically the anti-reverse device of a kind of direct-current input power supplying.
Background technology
Trolley coach three-phase inverter to be mainly on car the threephase loads such as air-conditioning and to power, to guarantee that passenger has a good environment by bus.Three-phase inverter must carry out the test of every operating mode before entrucking, and the input control power supply needed for test is direct current 110V, and input primary power is direct current 600V, provides by independently DC power cabinet.Usually, the positive and negative wire wire diameter of drawing in power cabinet is identical, color is identical, negative wire can be aligned by the heat-shrinkable T bush of additional different colours to distinguish, but Long-Time Service process middle sleeve can wear and tear gradually, not easily recognizes, simultaneously because of new employee to power cabinet operate unskilled, very easily cause the positive-negative power line reversal connection being connected to three-phase inverter, after power transmission, cause the scaling loss of inverter.
Summary of the invention
The technical problem to be solved in the present invention is: overcome above-mentioned deficiency, provides a kind of direct-current input power supplying anti-reverse device, effectively avoids the positive negative wire of input power to connect the anti-ballistic inverter scaling loss caused.
The technical solution adopted for the present invention to solve the technical problems is: the anti-reverse device of a kind of direct-current input power supplying, comprises that direct current 600V connects indicating circuit, direct current 600V reverse-connection preventing circuit, 600V+ power lead, 600V-power lead, direct current 110V connect indicating circuit, direct current 110V reverse-connection preventing circuit, 110V+ power lead, 110V-power lead.
Described direct current 600V connects indicating circuit and is made up of resistance R11, light emitting diode D1.One end of resistance R11 is connected with 600V+ power lead, and the other end is connected with the positive pole of light emitting diode D1, and the negative pole of light emitting diode D1 is connected with 600V-power lead.Direct current 600V connects indicating circuit entirety and is series between the positive and negative 600V of DC power cabinet and three-phase inverter primary power 600V input, and direct current 600V connection indicating circuit and direct current 600V reverse-connection preventing circuit are parallel connectivity.Wherein, R11 is winding-type resistance, and D1 is red light emitting diodes.
Described direct current 600V reverse-connection preventing circuit is made up of resistance R12, metal-oxide-semiconductor Q1.One end of resistance R12 is connected with 600V+ power lead, be serially connected with between the positive and negative 600V of DC power cabinet and three-phase inverter primary power 600V inputs by source S and drain D after the other end is connected with the grid G of metal-oxide-semiconductor Q1, it is parallel connectivity that direct current 600V reverse-connection preventing circuit and direct current 600V connect indicating circuit.Wherein R12 is common plug-in type resistance, and Q1 is N channel-type metal-oxide-semiconductor.
Described 600V+ power lead is the single core cable of black standard wall thickness, and wire diameter is 16mm
2, be made up of many segmentations, draw from DC power cabinet 600V+ port, after being transferred by intermediate circuit, be finally connected to three-phase inverter primary power 600V+ input port.Cable each end crimp type terminal, and brown heat-shrinkable T bush.
Described 600V-power lead is the single core cable of black standard wall thickness, and wire diameter is 16mm
2, be made up of many segmentations, draw from DC power cabinet 600V-port, after being transferred by intermediate circuit, be finally connected to three-phase inverter primary power 600V-input port.Cable each end crimp type terminal, and blue fever Heat-Shrinkable Tubings.
Described direct current 110V connects indicating circuit and is made up of resistance R21, light emitting diode D2.One end of resistance R21 is connected with 110V+ power lead, and the other end is connected with the positive pole of light emitting diode D2, and the negative pole of light emitting diode D2 is connected with 110V-power lead.Direct current 110V connects indicating circuit entirety and is series between the positive and negative 110V of DC power cabinet and the input of three-phase converter power supply 110V, and direct current 110V connects indicating circuit and direct current 110V reverse-connection preventing circuit is parallel connectivity.Wherein R21 is winding-type resistance, and D2 is yellow light-emitting diode.
Described direct current 110V reverse-connection preventing circuit is made up of resistance R22, metal-oxide-semiconductor Q2.One end of resistance R22 is connected with 110V+ power lead, be serially connected with between the positive and negative 110V of DC power cabinet and three-phase converter power supply 110V by source S and drain D after the other end is connected with the grid G of metal-oxide-semiconductor Q2, it is parallel connectivity that direct current 110V reverse-connection preventing circuit and direct current 110V connect indicating circuit.Wherein R22 is common plug-in type resistance, and Q2 is N channel-type metal-oxide-semiconductor.
Described 110V+ power lead is the single core cable of black standard wall thickness, and wire diameter is 2.5mm
2, be made up of many segmentations, draw from DC power cabinet 110V+ port, after intermediate circuit, be finally connected to three-phase converter power supply 110V+ input port.Cable each end crimp type terminal, and brown heat-shrinkable T bush.
Described 110V-power lead is the single core cable of black standard wall thickness, and wire diameter is 2.5mm
2, be made up of many segmentations, draw from DC power cabinet 110V-port, after intermediate circuit, be finally connected to three-phase converter power supply 110V-input port.Cable each end crimp type terminal, and blue fever Heat-Shrinkable Tubings.
The invention has the beneficial effects as follows: this device uses common common components, with low cost, make simple, safe and reliable.After three-phase inverter wiring completes power transmission, connect lighting of yellow light-emitting diode D2 in indicating circuit by red light emitting diodes D1 and direct current 110V in direct current 600V connection indicating circuit to indicate primary power 600V and control power supply 110V exact connect ion, various working condition tests can be started, and remind this region of non-commissioning staff to be live zone, in order to avoid be strayed into, guarantee personal safety.Not work as arbitrary light emitting diode or two light emitting diodes all do not work; the positive and negative wiring error of power supply is described; and play protection by the metal-oxide-semiconductor Q2 in the metal-oxide-semiconductor Q1 in direct current 600V reverse-connection preventing circuit and direct current 110V reverse-connection preventing circuit; circuit can not conducting; thus avoid the damage of three-phase inverter, reduce unnecessary waste.Correct a mistake promptly after power-off wiring, recovers test.Use metal-oxide-semiconductor to replace general counnter attack diode in device, greatly reduce the wastage, increase the service life, and multiple voltage grade can be adapted to, thus expansion applies to the debugging of other electric product.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the circuit theory diagrams of a kind of preventing reverse connection for DC power source device of the present invention.
In Fig. 1: 1. direct current 600V connects indicating circuit, 2. direct current 600V reverse-connection preventing circuit, 3.600V+ power lead, 4.600V-power lead, 5. direct current 110V connects indicating circuit, 6. direct current 110V reverse-connection preventing circuit, 7.110V+ power lead, 8.110V-power lead.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Embodiment
As shown in Figure 1, a kind of preventing reverse connection for DC power source device of the present invention, comprise direct current 600V and connect indicating circuit 1, direct current 600V reverse-connection preventing circuit 2,600V+ power lead 3,600V-power lead 4, direct current 110V connects indicating circuit 5, direct current 110V reverse-connection preventing circuit 6,110V+ power lead 7,110V-power lead 8.
Described direct current 600V connects indicating circuit 1 and is made up of resistance R11, light emitting diode D1.One end of resistance R11 is connected with 600V+ power lead 3, and the other end is connected with the positive pole of light emitting diode D1, and the negative pole of light emitting diode D1 is connected with 600V-power lead 4.Direct current 600V connects indicating circuit 1 entirety and is series between the positive and negative 600V of DC power cabinet and three-phase inverter primary power 600V input, and direct current 600V connects indicating circuit 1 and direct current 600V reverse-connection preventing circuit 2 is parallel connectivity.Wherein R11 is winding-type resistance, both as the current-limiting resistance of light emitting diode D1, has connect again to be prevented on light emitting diode D1 that reverse voltage is excessive causes scaling loss inverse time by dividing potential drop at 600V positive-negative power line.D1 is red light emitting diodes, whether is connected, keep Chang Liang using the warning as charging zone after connection in testing in actual use by the clear and definite direct current 600V of its light on and off.
Described direct current 600V reverse-connection preventing circuit 2 is made up of resistance R12, metal-oxide-semiconductor Q1.One end of resistance R12 is connected with 600V+ power lead 3, be serially connected with between the positive and negative 600V of DC power cabinet and three-phase inverter primary power 600V inputs by source S and drain D after the other end is connected with the grid G of metal-oxide-semiconductor Q1, it is parallel connectivity that direct current 600V reverse-connection preventing circuit 2 and direct current 600V connect indicating circuit 1.Wherein R12 is common plug-in type resistance, for metal-oxide-semiconductor Q1 provides voltage bias.Q1 is N channel-type metal-oxide-semiconductor, utilizes conducting and the disconnection of its switching characteristic control circuit, thus prevents reverse power connection from causing the scaling loss of three-phase inverter.When the positive and negative wiring of direct current 600V is correct, resistance R12 provides VGS voltage, metal-oxide-semiconductor Q1 saturation conduction; During the positive negative wire reversal connection of direct current 600V, metal-oxide-semiconductor Q1 can not conducting, thus plays anti-reverse effect.
Described 600V+ power lead 3 is the single core cable of black standard wall thickness, and wire diameter is 16mm
2, be made up of many segmentations, draw from DC power cabinet 600V+ port, after being transferred by intermediate circuit, be finally connected to three-phase inverter primary power 600V+ input port.Cable each end crimp type terminal is so that the reliable connection of each section of circuit, and additional brown heat-shrinkable T bush, as the mark of 600V+ power lead 3, improves wiring efficiency.
Described 600V-power lead 4 is the single core cable of black standard wall thickness, and wire diameter is 16mm
2, be made up of many segmentations, draw from DC power cabinet 600V-port, after being transferred by intermediate circuit, be finally connected to three-phase inverter primary power 600V-input port.Cable each end crimp type terminal is so that the reliable connection of each section of circuit, and additional blue fever Heat-Shrinkable Tubings, as the mark of 600V-power lead 4, improves wiring efficiency.
Described direct current 110V connects indicating circuit 5 and is made up of resistance R21, light emitting diode D2.One end of resistance R21 is connected with 110V+ power lead 7, and the other end is connected with the positive pole of light emitting diode D2, and the negative pole of light emitting diode D2 is connected with 110V-power lead 8.Direct current 110V connects indicating circuit 5 entirety and is series between the positive and negative 110V of DC power cabinet and the input of three-phase converter power supply 110V, and it is parallel connectivity that direct current 110V connects indicating circuit 5 with direct current 110V reverse-connection preventing circuit 6.Wherein R21 is winding-type resistance, both as the current-limiting resistance of light emitting diode D2, has connect again to be prevented on light emitting diode D2 that reverse voltage is excessive causes scaling loss inverse time by dividing potential drop at 110V positive-negative power line.D2 is yellow light-emitting diode, whether is connected, keep Chang Liang using the warning as charging zone after connection in testing in actual use by the clear and definite direct current 110V of its light on and off.
Described direct current 110V reverse-connection preventing circuit 6 is made up of resistance R22, metal-oxide-semiconductor Q2.One end of resistance R22 is connected with 110V+ power lead 7, be serially connected with between the positive and negative 110V of DC power cabinet and three-phase converter power supply 110V by source S and drain D after the other end is connected with the grid G of metal-oxide-semiconductor Q2, it is parallel connectivity that direct current 110V reverse-connection preventing circuit 6 and direct current 110V connect indicating circuit 5.Wherein R22 is common plug-in type resistance, for metal-oxide-semiconductor Q2 provides voltage bias.Q2 is N channel-type metal-oxide-semiconductor, utilizes conducting and the disconnection of its switching characteristic control circuit, thus prevents reverse power connection from causing the scaling loss of three-phase inverter.When the positive and negative wiring of direct current 110V is correct, resistance R22 provides VGS voltage, metal-oxide-semiconductor Q2 saturation conduction; During the positive negative wire reversal connection of direct current 110V, metal-oxide-semiconductor Q2 can not conducting, thus plays anti-reverse effect.
Described 110V+ power lead 7 is the single core cable of black standard wall thickness, and wire diameter is 2.5mm
2, be made up of many segmentations, draw from DC power cabinet 110V+ port, after intermediate circuit, be finally connected to three-phase converter power supply 110V+ input port.Cable each end crimp type terminal, so that the reliable connection of each section of circuit, additional brown heat-shrinkable T bush, as the mark of 110V+ power lead 7, improves wiring efficiency.
Described 110V-power lead 8 is the single core cable of black standard wall thickness, and wire diameter is 2.5mm
2, be made up of many segmentations, draw from DC power cabinet 110V-port, after intermediate circuit, be finally connected to three-phase converter power supply 110V-input port.Cable each end crimp type terminal, so that the reliable connection of each section of circuit, additional blue fever Heat-Shrinkable Tubings, as the mark of 110V-power lead 8, improves wiring efficiency.
This device uses common common components, with low cost, makes simple, safe and reliable.Situation is connected and as the warning lamp of charging zone by emitting LED light on and off indicating circuit.The positive and negative wiring of power supply is correct, and light emitting diode is lighted, metal-oxide-semiconductor conducting, three-phase inverter obtain electric can proper testing.Positive and negative wire reversal connection, light emitting diode extinguishes, and plays protection by metal-oxide-semiconductor, and circuit can not conducting, and correct a mistake promptly after power-off wiring, then recovers test.Use metal-oxide-semiconductor to replace general counnter attack diode in device, greatly reduce the wastage, increase the service life, and multiple voltage grade can be adapted to, thus expansion applies to the debugging of other electric product.
With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the scope not departing from this invention technological thought.The technical scope of this invention is not limited to the content on instructions, must determine its technical scope according to right.
Claims (5)
1. the anti-reverse device of direct-current input power supplying, is characterized in that: comprise direct current 600V and connect indicating circuit (1), direct current 600V reverse-connection preventing circuit (2), 600V+ power lead (3), 600V-power lead (4), direct current 110V connection indicating circuit (5), direct current 110V reverse-connection preventing circuit (6), 110V+ power lead (7) and 110V-power lead (8);
Described direct current 600V connects indicating circuit (1) and direct current 110V connects indicating circuit (5) by resistance and light emitting diode composition; Resistance one end is connected with power supply main track, and the other end is connected with light emitting diode positive pole, and light emitting diode negative pole is connected with power supply negative wire; Wherein resistance is winding-type, both as the current-limiting resistance of light emitting diode, has connect again to be prevented that reverse voltage on light emitting diode is excessive causes scaling loss inverse time by dividing potential drop at positive-negative power line; By the clear and definite circuit ON of its light on and off whether light emitting diode is monochromatic type, keep Chang Liang using the warning as charging zone after connection in testing;
Described direct current 600V reverse-connection preventing circuit (2) and direct current 110V reverse-connection preventing circuit (6) are by resistance and metal-oxide-semiconductor composition; One end of resistance is connected with power supply main track, is serially connected with between DC power cabinet out-put supply and three-phase inverter after the other end is connected with the grid G of metal-oxide-semiconductor by source S and drain D; Wherein resistance is common plug-in type, for metal-oxide-semiconductor provides voltage bias; Metal-oxide-semiconductor is the conducting and the disconnection that utilize its switching characteristic control circuit, thus prevents reverse power connection from causing the scaling loss of three-phase inverter;
The single core cable that described 600V+ power lead (3) and 600V-power lead (4) are black standard wall thickness, wire diameter is 16mm
2, draw from DC power cabinet, after being transferred by intermediate circuit, be finally connected to three-phase inverter primary power input port;
The single core cable that described 110V+ power lead (7) and 110V-power lead (8) are black standard wall thickness, wire diameter is 2.5mm
2, draw from DC power cabinet, after being transferred by intermediate circuit, be finally connected to three-phase converter power input port.
2. the anti-reverse device of direct-current input power supplying as claimed in claim 1, it is characterized in that: described direct current 600V connects indicating circuit (1) entirety and is series between the positive and negative 600V of DC power cabinet and three-phase inverter primary power 600V input, and direct current 600V connects indicating circuit (1) and direct current 600V reverse-connection preventing circuit (2) is parallel connectivity; Single color LED is wherein red.
3. the anti-reverse device of direct-current input power supplying as claimed in claim 1, it is characterized in that: described direct current 110V connects indicating circuit (5) entirety and is series between the positive and negative 110V of DC power cabinet and the input of three-phase converter power supply 110V, it is parallel connectivity that direct current 110V connects indicating circuit (5) with direct current 110V reverse-connection preventing circuit (6); Single color LED is wherein yellow.
4. the anti-reverse device of direct-current input power supplying as claimed in claim 1, is characterized in that: described direct current 600V reverse-connection preventing circuit (2) is N channel-type with the metal-oxide-semiconductor in direct current 110V reverse-connection preventing circuit (6).
5. the anti-reverse device of direct-current input power supplying as claimed in claim 1, it is characterized in that: described 600V+ power lead (3), 600V-power lead (4), 110V+ power lead (7), 110V-power lead (8) be segmentation composition all, cable each end crimp type terminal; 600V+ power lead (3) and the additional brown heat-shrinkable T bush of 110V+ power lead (7) are as power supply main track mark, and 600V-power lead (4) and the additional blue fever Heat-Shrinkable Tubings of 110V-power lead (8) identify as power supply negative wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700649.9A CN105486968A (en) | 2015-10-26 | 2015-10-26 | DC input power reverse connection prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700649.9A CN105486968A (en) | 2015-10-26 | 2015-10-26 | DC input power reverse connection prevention device |
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| Publication Number | Publication Date |
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| CN105486968A true CN105486968A (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510700649.9A Pending CN105486968A (en) | 2015-10-26 | 2015-10-26 | DC input power reverse connection prevention device |
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| Country | Link |
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| CN (1) | CN105486968A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940955A (en) * | 2017-05-12 | 2017-07-11 | 中国冶集团有限公司 | A kind of device and method of the training and examination of control cable connection technical ability |
| CN112688276A (en) * | 2020-12-28 | 2021-04-20 | 深圳市安帕尔科技有限公司 | Air station alarm host circuit and air station equipment |
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| CN202975231U (en) * | 2012-12-20 | 2013-06-05 | 江苏宏宝电子有限公司 | Direct-current anti-reverse detection system for photovoltaic grid-connected inverter |
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| CN204651920U (en) * | 2015-04-12 | 2015-09-16 | 林紫晴 | A kind of reverse-connection preventing circuit |
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Patent Citations (7)
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| CN2836301Y (en) * | 2005-08-28 | 2006-11-08 | 华为技术有限公司 | Reverse connection prevention circuit for power supply |
| CN103457255A (en) * | 2012-05-31 | 2013-12-18 | 海洋王（东莞）照明科技有限公司 | Power supply reverse-connection-preventing circuit and lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106940955A (en) * | 2017-05-12 | 2017-07-11 | 中国冶集团有限公司 | A kind of device and method of the training and examination of control cable connection technical ability |
| CN112688276A (en) * | 2020-12-28 | 2021-04-20 | 深圳市安帕尔科技有限公司 | Air station alarm host circuit and air station equipment |
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Application publication date: 20160413 |