CN205029571U - Super wide input voltage's isolation power - Google Patents
Super wide input voltage's isolation power Download PDFInfo
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- CN205029571U CN205029571U CN201520799001.7U CN201520799001U CN205029571U CN 205029571 U CN205029571 U CN 205029571U CN 201520799001 U CN201520799001 U CN 201520799001U CN 205029571 U CN205029571 U CN 205029571U
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- transformer
- isolating switch
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- switch power
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Abstract
The utility model discloses a super wide input voltage's isolation power, including an isolator power, the 2nd isolator power, first transformer, the second transformer, a voltage detection circuit, the 2nd voltage detection circuit and amplitude limiting protection circuit, an isolator power the first input end respectively with three phase current's A line, B line and C line connection, the second input and three phase current's the zero line of an isolator power are connected, three phase current's A line, B line and C line still are connected with the transformer, and circuit connection is protected with the 2nd isolator power and amplitude limiting respectively to the transformer, and the amplitude limiting protection circuit is connected with the 2nd isolator power, output burden DC power supply after an isolator power and the 2nd isolator power merge. The utility model discloses be applied to 30Vac-500Vac's instrument, instrument (containing all kinds of electric energy meters) working power supply, the occasion of solving different electric pressures needs the problem of different voltage range electric energy meters.
Description
Technical field
The utility model is applied to instrument, instrument (containing all kinds of electric energy meter) working power of input 30Vac ~ 500Vac, relates to a kind of insulating power supply of ultra-wide input voltage.
Background technology
The operating voltage range of current domestic instrument, instrument (containing electric energy meter) is all narrower.General work voltage range is: rated voltage ± 20%.Different power supply occasions needs the power supply of different electric pressure to coordinate, and brings unnecessary trouble to the wide range of application of instrument, instrument.
Such as: the operating voltage range of three-phase electric energy meter is from 57.7Vac ~ 380Vac.And the occasion of different electric pressure needs different voltage range electric energy meter.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of insulating power supply of ultra-wide input voltage.
The purpose of this utility model is achieved through the following technical solutions: a kind of insulating power supply of ultra-wide input voltage, and it comprises the first isolating switch power, the second isolating switch power, the first transformer, the second transformer, the first voltage detecting circuit, the second voltage detecting circuit and limiter protection circuit;
The first input end of the first described isolating switch power is connected with the A line of three phase mains, B line and C line respectively, and the second input of the first isolating switch power is connected with the zero line of three phase mains;
The A line of three phase mains also respectively with the first input end of limiter protection circuit, first transformer first input end connects, the B line of three phase mains also respectively with the second input of the first transformer, second input of the second transformer, second isolating switch power second input connects, the C line of three phase mains also respectively with the first input end of limiter protection circuit, the first input end of the second transformer connects, the output of the first transformer is connected with the first input end of the first voltage detecting circuit and the second isolating switch power respectively, the output of the second transformer is connected with the first input end of the second voltage detecting circuit and the second isolating switch power respectively, the output of the first voltage detecting circuit is connected with the control input end of limiter protection circuit with the output of the second voltage detecting circuit, the output of limiter protection circuit is connected with the first input end of the second isolating switch power,
Export positive direct-current power supply after first output of the first isolating switch power and the first output of the second isolating switch power merge, after the second output of the first isolating switch power and the second output of the second isolating switch power merge, export negative DC power supply.
Described limiter protection circuit comprises a field effect transistor, and the control signal input of field effect transistor is connected with the first voltage detecting circuit and the second voltage detecting circuit respectively.
The first described transformer is isolating transformer or autotransformer; The second described transformer is isolating transformer or autotransformer.
A kind of insulating power supply of ultra-wide input voltage also comprises three rectifier diodes D1, D2 and D3, described rectifier diode D1 is arranged between A line and the first isolating switch power, described rectifier diode D2 is arranged between the points of common connection of B line and the first isolating switch power, and described rectifier diode D3 is arranged between C line and the first isolating switch power.
The insulating power supply of ultra-wide input voltage also comprises a two rectifier diode D4 and D5, and described rectifier diode D4 is arranged between A line and limiter protection circuit; Described rectifier diode D5 is arranged between C line and limiter protection circuit.
The insulating power supply of ultra-wide input voltage also comprises an isolating diode D6, and the positive pole of described isolating diode D6 connects limiter protection circuit, and the negative pole of isolating diode D6 connects the second isolating switch power.
The insulating power supply of ultra-wide input voltage also comprises a two voltage stabilizing didoe D7 and D8, and the positive pole of described voltage stabilizing didoe D7 is connected with the output of the first transformer, and the negative pole of voltage stabilizing didoe D7 is connected with the second isolating switch power; The positive pole of described voltage stabilizing didoe D8 is connected with the output of the second transformer, and the negative pole of voltage stabilizing didoe D8 is connected with the second isolating switch power.
The beneficial effects of the utility model are: the utility model realizes two parts input to phase three-wire three and three-phase and four-line, and achieve the insulating power supply of ultra-wide input voltage, can be widely used in inputting the instrument of 30Vac ~ 500Vac, the working power of instrument (containing all kinds of electric energy meter), solve the problem that different electric pressure occasion needs different voltage range electric energy meter.
Accompanying drawing explanation
Fig. 1 is the utility model block diagram;
Fig. 2 is utility model works mode schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail:
In the present embodiment, the operating voltage range of the first isolating switch power and the second isolating switch power is: 20 ~ 265Vac.
As shown in Figure 1, a kind of insulating power supply of ultra-wide input voltage, it comprises the first isolating switch power, the second isolating switch power, the first transformer, the second transformer, the first voltage detecting circuit, the second voltage detecting circuit and limiter protection circuit;
The first input end of the first described isolating switch power is connected with the A line of three phase mains, B line and C line respectively, and the second input of the first isolating switch power is connected with the zero line of three phase mains;
The A line of three phase mains also respectively with the first input end of limiter protection circuit, first transformer first input end connects, the B line of three phase mains also respectively with the second input of the first transformer, second input of the second transformer, second isolating switch power second input connects, the C line of three phase mains also respectively with the first input end of limiter protection circuit, the first input end of the second transformer connects, the output of the first transformer is connected with the first input end of the first voltage detecting circuit and the second isolating switch power respectively, the output of the second transformer is connected with the first input end of the second voltage detecting circuit and the second isolating switch power respectively, the output of the first voltage detecting circuit is connected with the control input end of limiter protection circuit with the output of the second voltage detecting circuit, the output of limiter protection circuit is connected with the first input end of the second isolating switch power,
Export positive direct-current power supply after first output of the first isolating switch power and the first output of the second isolating switch power merge, after the second output of the first isolating switch power and the second output of the second isolating switch power merge, export negative DC power supply.
Described limiter protection circuit comprises a field effect transistor, and the control signal input of field effect transistor is connected with the first voltage detecting circuit and the second voltage detecting circuit respectively.
The first described transformer is isolating transformer or autotransformer; The second described transformer is isolating transformer or autotransformer.
A kind of insulating power supply of ultra-wide input voltage also comprises three rectifier diodes D1, D2 and D3, described rectifier diode D1 is arranged between A line and the first isolating switch power, described rectifier diode D2 is arranged between the points of common connection of B line and the first isolating switch power, and described rectifier diode D3 is arranged between C line and the first isolating switch power.
The insulating power supply of ultra-wide input voltage also comprises a two rectifier diode D4 and D5, and described rectifier diode D4 is arranged between A line and limiter protection circuit; Described rectifier diode D5 is arranged between C line and limiter protection circuit.
The insulating power supply of ultra-wide input voltage also comprises an isolating diode D6, and the positive pole of described isolating diode D6 connects limiter protection circuit, and the negative pole of isolating diode D6 connects the second isolating switch power.
The insulating power supply of ultra-wide input voltage also comprises a two voltage stabilizing didoe D7 and D8, and the positive pole of described voltage stabilizing didoe D7 is connected with the output of the first transformer, and the negative pole of voltage stabilizing didoe D7 is connected with the second isolating switch power; The positive pole of described voltage stabilizing didoe D8 is connected with the output of the second transformer, and the negative pole of voltage stabilizing didoe D8 is connected with the second isolating switch power.
As shown in Figure 2, circuit specific works mode:
(1) general three-phase and four-line power-frequency voltage can not more than 265Vac, therefore this input voltage directly can be accessed (or accessing after rectification) first isolating switch power;
(2) if the mode of phase three-wire three, can carry out different output according to input voltage size, limiter protection circuit is in opening state:
(2-1) when phase three-wire three voltage will more than 265Vac time, two road input voltage detection circuits will export control signal, close the field effect transistor in limiter protection circuit by force, stop and pass through more than the voltage of 265Vac.Power supply now through the first transformer T1, the second transformer T2 step-down enters the second isolating switch power.Due to powered on moment, the hysteresis of transformer, the first voltage detecting circuit and the second voltage detecting circuit also do not work.If the high pressure not amplitude limit of input, will burn out follow-up Switching Power Supply.Therefore a limiter protection circuit is added in the loop.
(2-2) when phase three-wire three voltage will lower than 265Vac time, limiter protection circuit is directly open-minded, input voltage is directly accessed the second follow-up isolating switch power.Because voltage is lower than 265Vac, transformer exports too low, and input voltage detection circuit does not work, and can not control limiter protection circuit.
DC power supply after merging via the first isolating switch power and the second isolating switch power, can export to application system.Thus achieve the ultra-wide input voltage power supply of 30 ~ 500Vac.
Claims (7)
1. an insulating power supply for ultra-wide input voltage, is characterized in that: it comprises the first isolating switch power, the second isolating switch power, the first transformer, the second transformer, the first voltage detecting circuit, the second voltage detecting circuit and limiter protection circuit;
The first input end of the first described isolating switch power is connected with the A line of three phase mains, B line and C line respectively, and the second input of the first isolating switch power is connected with the zero line of three phase mains;
The A line of three phase mains also respectively with the first input end of limiter protection circuit, first transformer first input end connects, the B line of three phase mains also respectively with the second input of the first transformer, second input of the second transformer, second isolating switch power second input connects, the C line of three phase mains also respectively with the first input end of limiter protection circuit, the first input end of the second transformer connects, the output of the first transformer is connected with the first input end of the first voltage detecting circuit and the second isolating switch power respectively, the output of the second transformer is connected with the first input end of the second voltage detecting circuit and the second isolating switch power respectively, the output of the first voltage detecting circuit is connected with the control input end of limiter protection circuit with the output of the second voltage detecting circuit, the output of limiter protection circuit is connected with the first input end of the second isolating switch power,
Export positive direct-current power supply after first output of the first isolating switch power and the first output of the second isolating switch power merge, after the second output of the first isolating switch power and the second output of the second isolating switch power merge, export negative DC power supply.
2. the insulating power supply of a kind of ultra-wide input voltage according to claim 1; it is characterized in that: described limiter protection circuit comprises a field effect transistor, the control signal input of field effect transistor is connected with the first voltage detecting circuit and the second voltage detecting circuit respectively.
3. the insulating power supply of a kind of ultra-wide input voltage according to claim 1, is characterized in that: the first described transformer is isolating transformer or autotransformer; The second described transformer is isolating transformer or autotransformer.
4. the insulating power supply of a kind of ultra-wide input voltage according to claim 1, it is characterized in that: also comprise three rectifier diodes D1, D2 and D3, described rectifier diode D1 is arranged between A line and the first isolating switch power, described rectifier diode D2 is arranged between the points of common connection of B line and the first isolating switch power, and described rectifier diode D3 is arranged between C line and the first isolating switch power.
5. the insulating power supply of a kind of ultra-wide input voltage according to claim 1, it is characterized in that: also comprise two rectifier diode D4 and D5, described rectifier diode D4 is arranged between A line and limiter protection circuit; Described rectifier diode D5 is arranged between C line and limiter protection circuit.
6. the insulating power supply of a kind of ultra-wide input voltage according to claim 1; it is characterized in that: also comprise an isolating diode D6; the positive pole of described isolating diode D6 connects limiter protection circuit, and the negative pole of isolating diode D6 connects the second isolating switch power.
7. the insulating power supply of a kind of ultra-wide input voltage according to claim 1, it is characterized in that: also comprise two voltage stabilizing didoe D7 and D8, the positive pole of described voltage stabilizing didoe D7 is connected with the output of the first transformer, and the negative pole of voltage stabilizing didoe D7 is connected with the second isolating switch power; The positive pole of described voltage stabilizing didoe D8 is connected with the output of the second transformer, and the negative pole of voltage stabilizing didoe D8 is connected with the second isolating switch power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520799001.7U CN205029571U (en) | 2015-10-16 | 2015-10-16 | Super wide input voltage's isolation power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520799001.7U CN205029571U (en) | 2015-10-16 | 2015-10-16 | Super wide input voltage's isolation power |
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| Publication Number | Publication Date |
|---|---|
| CN205029571U true CN205029571U (en) | 2016-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520799001.7U Withdrawn - After Issue CN205029571U (en) | 2015-10-16 | 2015-10-16 | Super wide input voltage's isolation power |
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| Country | Link |
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| CN (1) | CN205029571U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141147A (en) * | 2015-10-16 | 2015-12-09 | 成都天兴电气有限公司 | Ultra-wide input voltage isolation power supply and method |
-
2015
- 2015-10-16 CN CN201520799001.7U patent/CN205029571U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141147A (en) * | 2015-10-16 | 2015-12-09 | 成都天兴电气有限公司 | Ultra-wide input voltage isolation power supply and method |
| CN105141147B (en) * | 2015-10-16 | 2017-06-09 | 成都天兴电气有限公司 | The insulating power supply and method of a kind of ultra-wide input voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160210 Effective date of abandoning: 20170609 |