CN203399007U - Wide-input-voltage power supply for distribution terminal - Google Patents
Wide-input-voltage power supply for distribution terminal Download PDFInfo
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- CN203399007U CN203399007U CN201320409118.0U CN201320409118U CN203399007U CN 203399007 U CN203399007 U CN 203399007U CN 201320409118 U CN201320409118 U CN 201320409118U CN 203399007 U CN203399007 U CN 203399007U
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 32
- 238000005070 sampling Methods 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model discloses a wide-input-voltage power supply for a distribution terminal. The wide-input-voltage power supply comprises an AC-DC converting circuit, a transformer, a switch tube, a switch tube starting loop, a driving loop, a driving bypass, a voltage stabilizing and adjusting circuit and an over-current protection circuit, wherein the switch tube starting loop, the driving bypass without a bypass capacitor, the voltage stabilizing and adjusting circuit without a potentiometer and a current sampling circuit without a sampling resistor are form an independent thick-film circuit unit. The wide-input-voltage power supply is provided with a voltage stabilizing and adjusting circuit, and intelligent voltage adjustment can be realized by changing the potentiometer. The output of the power supply is stable, and the over-current protection circuit ensures reliable work of the power supply. Partial circuit is made into a thick film circuit unit based on the characteristics thereof, which substantially increasing the integration degree of the circuit. The circuit is more compact in structure, and circuit performance and work stability are improved.
Description
Technical field
The utility model relates to distribution terminal power supply technique, is specially a kind of distribution terminal wide input voltage power supply.
Background technology
Existing power distribution network terminal is terminal on post particularly, because being arranged on open air, can not adopt the supply power mode of common civil power, therefore to obtain employing voltage transformer be PT supply power mode to power supply, and the alternating voltage distribution network terminal that instrument transformer equipment directly changes 220V or 110V grade into 10KV line voltage distribution is used.When there is large fluctuation in the voltage of 10KV electrical network, the voltage of voltage transformer output also there will be large fluctuation, because the operating voltage range of existing power distribution network terminal is all 80%Un-150%Un, 50% distribution terminal when above that is greater than rated value when fluctuation, with regard to cisco unity malfunction, can not be realized the monitoring to power distribution network.
Summary of the invention
For the problems referred to above, the utility model provides the distribution terminal power supply of a kind of stable output, reliable operation, the complicated fluctuation of adaptation power distribution network power environment, when this power supply fluctuates between the 20%-200% in rated voltage in input voltage size, also can reliably working stable output voltage.
The utility model is that the technical scheme that its technical problem of solution adopts is:
A wide input voltage power supply, comprising: ac-dc converter circuit, has positive voltage terminal and earth terminal for exporting; At primary side, have main coil and ancillary coil and at secondary side, have the transformer of at least one output winding, one end of main coil is connected with positive voltage terminal, and one end of ancillary coil is connected with earth terminal; Collector electrode and the switching tube that the main coil other end is connected, emitter is connected with earth terminal; Switching tube starts loop, and it is serially connected with between positive voltage terminal and the base stage of switching tube; Be serially connected with the driving loop between switching tube base stage and the ancillary coil other end; Drive bypass, comprise bypass voltage stabilizing didoe, bypass diode and shunt capacitance, the negative electrode of bypass voltage stabilizing didoe is connected with the base stage of switching tube, the anodic bonding of anode and bypass diode, the negative electrode of bypass diode is connected with the ancillary coil other end, the positive terminal of shunt capacitance is connected with earth terminal, and negative pole end is connected with the junction of bypass voltage stabilizing didoe and bypass diode; Voltage stabilizing regulating circuit, comprises and is connected to the adjustable voltage-stabiliser tube at bypass voltage stabilizing didoe two ends and for controlling the change resistance loop of adjustable voltage-stabiliser tube voltage stabilizing value, becomes in resistance loop and be provided with potentiometer; Current foldback circuit, comprise the overcurrent protection triode being connected between switching tube base stage and earth terminal, the emitter that is serially connected with switching tube and the sampling resistor between earth terminal and be connected to switching tube emitter and overcurrent protection transistor base between sampling circuit; The current sampling circuit that described switching tube starts loop, remove the driving bypass of shunt capacitance, remove the voltage stabilizing regulating circuit of potentiometer and remove sampling resistor is configured to independently thick film circuit unit.
Wherein, described switching tube starts loop and is formed by least one voltage-stabiliser tube and at least one current-limiting resistance serial connection, and the negative electrode of voltage-stabiliser tube electrically connects near positive voltage terminal one side, and anode electrically connects near switching tube base stage one side.
Described driving loop is by driving electric capacity and current-limiting resistance serial connection to form.
This power supply also comprises the backward diode being connected between switching tube, and backward diode is arranged in thick film circuit unit.
The beneficial effects of the utility model are: the utility model is provided with voltage stabilizing regulating circuit, by the change of potentiometer, realize the adjustment to voltage, power supply stable output; Arranging of current foldback circuit can guarantee that this power work is reliable; Partial circuit forms the form of being arranged to thick film circuit unit based on its characteristic, has greatly increased the degree of integration of circuit, and circuit structure is compacter, and the stability of circuit performance and work gets a promotion.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, be further detailed:
Fig. 1 is integrated circuit schematic diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of thick film circuit unit.
Embodiment
The utility model improves and forms on existing RCC power supply.See figures.1.and.2, power supply of the present utility model comprises that ac-dc converter circuit 1, transformer 2, switching tube 3, switching tube start loop, drive loop, drive bypass, voltage stabilizing regulating circuit, current foldback circuit, between switching tube and be connected to backward diode.Wherein backward diode, switching tube start loop, remove the driving bypass of shunt capacitance, the current sampling circuit of removing the voltage stabilizing regulating circuit of potentiometer and removing sampling resistor is configured to independently thick film circuit unit 4.The general silk screen printing process that adopts in this thick film circuit unit 4 is made, and is suitable for that voltage is high, electric current is large, powerful occasion, so it is particularly suitable for this power-supply system and uses, and this element has increased the integrated level of system greatly, makes to assemble maintenance work easier.During specific implementation, this thick film circuit unit is connected with other parts of circuit by a plurality of pins of design.
Ac-dc converter circuit 1 is converted to direct voltage by input voltage, and it has positive voltage terminal and earth terminal for exporting.Transformer 2 has main coil and ancillary coil and has at least one output winding at secondary side at primary side, and one end of main coil is connected with positive voltage terminal, and one end of ancillary coil is connected with earth terminal.The two ends of main coil the diode being connected to by current-limiting resistance and fast restitution are connected in series the loop forming.The quantity of output winding arranges as required.
Switching tube 3 can utilize the various switching tubes such as IGBT, metal-oxide-semiconductor to realize, and its collector electrode is connected with the main coil other end, emitter is connected with earth terminal.Switching tube starts loop and is serially connected with between positive voltage terminal and the base stage of switching tube 3, by voltage-stabiliser tube ZD11, ZD12 and current-limiting resistance R71, R72 serial connection, formed, the negative electrode of voltage-stabiliser tube electrically connects near positive voltage terminal one side, and anode electrically connects near switching tube base stage one side.When positive voltage terminal voltage surpasses certain voltage, ZD11, ZD12 conducting, switching tube 3 conductings, power initiation.As shown in Figure 1, drive loop to be formed by the current-limiting resistance R3A after driving capacitor C 6 and parallel connection and R3B serial connection.
Drive bypass to comprise bypass voltage stabilizing didoe ZD2, bypass diode D3 and shunt capacitance C7, the negative electrode of bypass voltage stabilizing didoe ZD2 is connected with the base stage of switching tube 3, the anodic bonding of anode and bypass diode D3, the negative electrode of bypass diode D3 is connected with the ancillary coil other end, the positive terminal of shunt capacitance C7 is connected with earth terminal, and negative pole end is connected with bypass diode D3 junction with bypass voltage stabilizing didoe ZD2.Open the light between pipe 3 closers, ancillary coil is that C7 charges by the D3 of conducting, and the voltage of C7 becomes negative voltage, and bypass voltage stabilizing didoe ZD2 conducting forms conducting bypass, and switching tube 3 is closed.
The approximate direct ratio of reverse voltage stabilizing value of the secondary side output voltage values of this power supply and bypass voltage stabilizing didoe ZD2, therefore can be by regulating its reverse voltage stabilizing value to control the magnitude of voltage of output.In the utility model, comprise a voltage stabilizing regulating circuit, specifically comprise and be connected to the adjustable voltage-stabiliser tube at bypass voltage stabilizing didoe ZD2 two ends and for controlling the change resistance loop of adjustable voltage-stabiliser tube voltage stabilizing value, becoming resistance loop is comprised of resistance R 4, R5 and potentiometer VR1, when VR1 is changed to, the reverse voltage stabilizing value of adjustable voltage-stabiliser tube changes, thereby changes the reverse voltage stabilizing value in this driving bypass.
Current foldback circuit comprise the overcurrent protection triode TR1 that is connected between switching tube 3 base stages and earth terminal, be serially connected with the emitter of switching tube and the sampling resistor R6 between earth terminal and be connected to switching tube emitter and overcurrent protection transistor base between sampling circuit, this sampling circuit is comprised of the resistance being connected in series and diode.When the electric current that passes through as sampling resistor R6 is excessive, the input voltage of sampling circuit, by conducting TR1, closes switching tube 3, reaches the object of protection.
Execution mode of the present utility model is not restricted to the described embodiments, as long as it reaches technique effect of the present utility model with essentially identical means, all should belong to protection range of the present utility model.
Claims (4)
1. a distribution terminal wide input voltage power supply, is characterized in that comprising:
Ac-dc converter circuit, has positive voltage terminal and earth terminal for exporting;
At primary side, have main coil and ancillary coil and at secondary side, have the transformer of at least one output winding, one end of main coil is connected with positive voltage terminal, and one end of ancillary coil is connected with earth terminal;
Collector electrode and the switching tube that the main coil other end is connected, emitter is connected with earth terminal;
Switching tube starts loop, and it is serially connected with between positive voltage terminal and the base stage of switching tube;
Be serially connected with the driving loop between switching tube base stage and the ancillary coil other end;
Drive bypass, comprise bypass voltage stabilizing didoe, bypass diode and shunt capacitance, the negative electrode of bypass voltage stabilizing didoe is connected with the base stage of switching tube, the anodic bonding of anode and bypass diode, the negative electrode of bypass diode is connected with the ancillary coil other end, the positive terminal of shunt capacitance is connected with earth terminal, and negative pole end is connected with the junction of bypass voltage stabilizing didoe and bypass diode;
Voltage stabilizing regulating circuit, comprises and is connected to the adjustable voltage-stabiliser tube at bypass voltage stabilizing didoe two ends and for controlling the change resistance loop of adjustable voltage-stabiliser tube voltage stabilizing value, becomes in resistance loop and be provided with potentiometer;
Current foldback circuit, comprise the overcurrent protection triode being connected between switching tube base stage and earth terminal, the emitter that is serially connected with switching tube and the sampling resistor between earth terminal and be connected to switching tube emitter and overcurrent protection transistor base between sampling circuit;
The current sampling circuit that described switching tube starts loop, remove the driving bypass of shunt capacitance, remove the voltage stabilizing regulating circuit of potentiometer and remove sampling resistor is configured to independently thick film circuit unit.
2. a kind of distribution terminal wide input voltage power supply according to claim 1, it is characterized in that described switching tube starts loop and formed by least one voltage-stabiliser tube and at least one current-limiting resistance serial connection, the negative electrode of voltage-stabiliser tube electrically connects near positive voltage terminal one side, and anode electrically connects near switching tube base stage one side.
3. a kind of distribution terminal wide input voltage power supply according to claim 1, is characterized in that described driving loop is by driving electric capacity and current-limiting resistance serial connection to form.
4. a kind of distribution terminal wide input voltage power supply according to claim 1, is characterized in that comprising the backward diode being connected between switching tube, and backward diode is arranged in thick film circuit unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320409118.0U CN203399007U (en) | 2013-07-10 | 2013-07-10 | Wide-input-voltage power supply for distribution terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320409118.0U CN203399007U (en) | 2013-07-10 | 2013-07-10 | Wide-input-voltage power supply for distribution terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203399007U true CN203399007U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320409118.0U Expired - Lifetime CN203399007U (en) | 2013-07-10 | 2013-07-10 | Wide-input-voltage power supply for distribution terminal |
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| Country | Link |
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| CN (1) | CN203399007U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401439A (en) * | 2013-07-10 | 2013-11-20 | 珠海许继芝电网自动化有限公司 | Wide-input voltage power supply of power distribution terminal |
-
2013
- 2013-07-10 CN CN201320409118.0U patent/CN203399007U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401439A (en) * | 2013-07-10 | 2013-11-20 | 珠海许继芝电网自动化有限公司 | Wide-input voltage power supply of power distribution terminal |
| CN103401439B (en) * | 2013-07-10 | 2015-07-08 | 珠海许继芝电网自动化有限公司 | Wide-input voltage power supply of power distribution terminal |
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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 |
Granted publication date: 20140115 Effective date of abandoning: 20150708 |
|
| RGAV | Abandon patent right to avoid regrant |