CN204013230U - Auxiliary power circuit - Google Patents

Auxiliary power circuit Download PDF

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Publication number
CN204013230U
CN204013230U CN201420395125.4U CN201420395125U CN204013230U CN 204013230 U CN204013230 U CN 204013230U CN 201420395125 U CN201420395125 U CN 201420395125U CN 204013230 U CN204013230 U CN 204013230U
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Prior art keywords
circuit
power supply
elementary translation
terminal
elementary
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CN201420395125.4U
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Inventor
陈冀生
王建廷
程亮
仇雷
康海震
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SICON CHAT UNION ELECTRIC CO., LTD.
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HEBEI SICON-EMI POWER SYSTEM Co Ltd
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Abstract

The utility model provides a kind of auxiliary power circuit.The utility model auxiliary power circuit, comprising: at least two elementary translation circuits, and each elementary translation circuit includes an armature winding, and a direct voltage source; At least one secondary transformation output power supply circuits, each secondary transformation output power supply circuits include a secondary winding; Main power conversion flyback transformer, described main power conversion flyback transformer is made up of the each secondary winding in the each armature winding in each elementary translation circuit and each secondary transformation output power supply circuits; Control circuit, is electrically connected with each elementary translation circuit respectively, for each elementary translation circuit is carried out to switch control.Auxiliary power circuit circuit of the present utility model number of devices simple, that use is less, thereby effectively save the cost of auxiliary power circuit, and, the each elementary translation circuit power-sharing of the auxiliary power circuit that the utility model provides, current-sharing is effective.

Description

Auxiliary power circuit
Technical field
The utility model relates to power technology, relates in particular to a kind of auxiliary power circuit.
Background technology
Accessory power supply is converted into through high frequency conversion the output voltage that signal control circuit needs by the input direct voltage of equipment, for example high-voltage direct-current electricity can be exported to a series of high-quality direct currents such as 5V, 12V, 3.3V through accessory power supply, the signal control circuit power supply that offers device interior is used.In various power electronic equipments, auxiliary power circuit, as a requisite part, obtains using very widely.For example, in uninterrupted power supply (Uninterruptible Power Supply, be called for short UPS), also need auxiliary power circuit to provide DC power supply for its inside, to ensure the normal work of each signal control circuit in UPS.
Be applied to the accessory power supply in the three-level inverter circuit in UPS, because the input voltage of tri-level inversion circuit is negative and positive dual power power supply, as: ± 380VDC.For ensureing busbar voltage ± 380VDC balance, the single-ended reverse exciting translation circuit that traditional accessory power supply adopts two-way independently to control conventionally, input+380VDC uses the single-ended reverse exciting translation circuit that a road is independently controlled, the single-ended reverse exciting translation circuit that input-380VDC uses a road independently to control, the output-parallel after rectification is powered to signal control circuit together.
But adopt above-mentioned accessory power supply, its auxiliary power circuit complexity, device is many, and cost is higher.And due to the single-ended reverse exciting translation circuit that adopts two-way independently to control, parallel connection is carried out in the single-ended reverse exciting translation circuit that output need to independently be controlled two-way output separately, can cause thus this accessory power supply current-sharing weak effect.
Utility model content
The utility model provides a kind of auxiliary power circuit, to solve the higher problem of circuit complexity, cost of auxiliary power circuit in prior art.
The utility model provides a kind of auxiliary power circuit, comprising:
At least two elementary translation circuits, each elementary translation circuit includes an armature winding, and a direct voltage source;
At least one secondary transformation output power supply circuits, each secondary transformation output power supply circuits include a secondary winding;
Main power conversion flyback transformer, described main power conversion flyback transformer is made up of the each secondary winding in the each armature winding in each elementary translation circuit and each secondary transformation output power supply circuits;
Control circuit, is electrically connected with each elementary translation circuit respectively, for each elementary translation circuit is carried out to switch control.
Further, the number of turn of each armature winding is identical or different, and the number of turn of each secondary winding is identical or different.
Further, each elementary translation circuit also wraps and can draw together:
Diode, the positive pole of described diode is connected with the positive pole of described direct voltage source, and the negative pole of described diode is connected with one end of described armature winding;
Power tube, the first terminal of described power tube is connected with the other end of described armature winding;
Driving transformer, one end of described driving transformer is connected with the second terminal of described power tube, and the other end of described driving transformer is electrically connected with described control circuit, for described control circuit and described power tube are isolated;
Current transformer, between the 3rd terminal and the negative pole of described direct voltage source that are connected to described power tube of described current transformer, the output of described current transformer is electrically connected with described control circuit, for obtaining the sample rate current value of described elementary translation circuit, and described sample rate current value is flowed to described control circuit;
Described control circuit is specifically for carrying out switch control according to described sample rate current value to described power tube.
Further, each secondary transformation output power supply circuits can also comprise:
Rectifier diode, the positive pole of described rectifier diode is connected with one end of described secondary winding;
Commutation capacitor, the positive pole of described commutation capacitor is connected to the first tie point place between the negative pole of described rectifier diode and the first output of described secondary transformation output power supply circuits; The negative pole of described commutation capacitor is connected to the second tie point place between the other end of described secondary winding and the second output of described secondary transformation output power supply circuits.
Further, described power tube is triode, corresponding, described the first terminal is collector electrode, and described the second terminal is base stage, and described the 3rd terminal is emitter; Or described power tube is metal-oxide-semiconductor, corresponding, described the first terminal is drain electrode, and described the second terminal is grid, and described the 3rd terminal is source electrode.
The utility model auxiliary power circuit, by at least two elementary translation circuits by different input dc power potential sources, through a main power conversion flyback transformer, the output of secondary transformation output power supply circuits offers the direct current of the signal control circuit power supply of device interior, each elementary translation circuit is carried out in switch control procedure, use a control circuit to complete each elementary translation circuit control, the auxiliary power circuit circuit that the utility model provides is simple, the number of devices using is less, thereby effectively save the cost of auxiliary power circuit, and, the each elementary translation circuit power-sharing of the auxiliary power circuit that the utility model provides, current-sharing is effective.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the utility model auxiliary power circuit embodiment mono-;
Fig. 2 is the structural representation of the utility model auxiliary power circuit embodiment bis-.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the utility model auxiliary power circuit embodiment mono-, as shown in Figure 1, the auxiliary power circuit of the present embodiment can comprise: at least two elementary translation circuits 10, at least one secondary transformation output power supply circuits 20, main power conversion flyback transformer 30 and a control circuit 40.
Wherein, elementary translation circuit 10 comprises an armature winding, and a direct voltage source.Direct voltage source difference in each elementary translation circuit 10, the magnitude of voltage of each direct voltage source can be the same or different.The number of elementary translation circuit determines by the number of input dc power potential source, and the number of such as elementary translation circuit can be 2,3,4 etc.Secondary transformation output power supply circuits 20 comprise a secondary winding.Main power conversion flyback transformer 30 is made up of the each secondary winding in the each armature winding in each elementary translation circuit 10 and each secondary transformation output power supply circuits 20.Control circuit 40 is electrically connected with each elementary translation circuit 10 respectively, for each elementary translation circuit 10 is carried out to switch control.
The auxiliary power circuit that the present embodiment provides passes through at least two elementary translation circuits by different input dc power potential sources, through a main power conversion flyback transformer, the output of secondary transformation output power supply circuits offers the direct current of the signal control circuit power supply of device interior, each elementary translation circuit is carried out in switch control procedure, use a control circuit to complete each elementary translation circuit control, the auxiliary power circuit circuit that the present embodiment provides is simple, the number of devices using is less, thereby effectively save the cost of auxiliary power circuit, and, the each elementary translation circuit power-sharing of the auxiliary power circuit that the present embodiment provides, current-sharing is effective.
It should be noted that, the auxiliary power circuit that the each embodiment of the utility model provides specifically can be applied to multi-channel DC voltage source and input shared auxiliary power circuit, for example, when the input voltage of use three-level inverter circuit is inputted as direct voltage source, because three-level inverter is dual power supply, so now, auxiliary power circuit of the present utility model can arrange two elementary translation circuits; And for example, in the time using the input voltage of booster circuit (boost circuit) in UPS and output voltage as the input of direct voltage source, auxiliary power circuit of the present utility model can arrange four elementary translation circuits.The number of elementary translation circuit can arrange according to demand flexibly.
Fig. 2 is the structural representation of the utility model auxiliary power circuit embodiment bis-, and as shown in Figure 2, on the basis of the structure of the auxiliary power circuit embodiment illustrated in fig. 1, elementary translation circuit 10 can also comprise: diode, power tube, driving transformer summation current transformer, the auxiliary power circuit shown in Fig. 2 be on embodiment illustrated in fig. 1 one basis with 3 elementary translation circuit explanations for example, the first elementary translation circuit comprises: direct voltage source E1, diode D3, armature winding T1A, power tube Q1, current transformer TC1 and driving transformer TV1, the second elementary translation circuit comprises: direct voltage source E2, diode D4, armature winding T1B, power tube Q2, current transformer TC2 and driving transformer TV2, the 3rd elementary translation circuit comprises: direct voltage source E3, diode D5, armature winding T1C, power tube Q3, armature winding T1C, power tube Q3, current transformer TC3 and driving transformer TV3, wherein the first elementary translation circuit, the second elementary translation circuit and the 3rd elementary translation circuit share a control circuit, each elementary translation circuit are carried out to switch control, the armature winding T1A in the first elementary translation circuit, armature winding T1C in armature winding T1B in the second elementary translation circuit and the 3rd elementary translation circuit is provided by a main power flyback transformer 30.Wherein, the number of turn of armature winding T1A, armature winding T1B and armature winding T1C can be the same or different, and can arrange flexibly according to the actual requirements.
Annexation in the first elementary translation circuit between each device is specially, the positive pole of direct voltage source E1 is connected with the positive pole of diode D3, the negative pole of diode D3 is connected with the end points a of armature winding T1A, the first terminal of power tube Q1 is connected with the end points b of armature winding T1A, the second terminal of power tube Q1 is connected with one end of driving transformer TV1, the other end of driving transformer TV1 is electrically connected with control circuit, for control circuit 40 is isolated with power tube Q1, thereby in the time that breaking down, auxiliary power circuit prevents that high voltage from damaging control circuit 40, current transformer TC1 is connected between the 3rd terminal and the negative pole of direct voltage source E1 of power tube Q1, the output of current transformer TC1 is electrically connected with control circuit 40, for obtaining the sample rate current value I1 of the first elementary translation circuit, and this sample rate current value I1 is flowed to control circuit 40, the output of control circuit 40 is connected with driving transformer, for power tube Q1 being carried out to switch control according to sample rate current value.Wherein, power tube Q1, Q2 and Q3 can be triode, and corresponding the first terminal is collector electrode, and the second terminal is base stage, and the 3rd terminal is emitter.Power tube Q1, Q2 and Q3 can be also metal-oxide-semiconductor, and corresponding the first terminal is drain electrode, and the second terminal is grid, and the 3rd terminal is source electrode.
Annexation in each elementary translation circuit between each device, here with the explanation for example of the first elementary translation circuit, annexation in the second elementary translation circuit of the auxiliary power circuit shown in Fig. 2 and the 3rd elementary translation circuit between each device is identical with the first elementary translation circuit, repeat no more herein, it should be noted that, the sample rate current value that current transformer TC2 in the second elementary translation circuit obtains is I2, the sample rate current value that current transformer TC3 in the 3rd elementary translation circuit obtains is I3, the first elementary translation circuit, the second elementary translation circuit and the 3rd elementary translation circuit share a control circuit 40, control circuit 40 obtains the sample rate current value of each elementary translation circuit, by sample rate current value I1, I2 and I3 are as input, produce corresponding control information and flow to the each power tube in each elementary translation circuit by each driving transformer, each power tube is carried out to switch control.
The number of secondary transformation output power supply circuits can arrange according to demand flexibly, in the time that needs are given a signal control circuit power supply, secondary transformation output power supply circuits can be set, need to give multiple signal control circuit power supply time, multiple secondary transformation output power supply circuits can be set.
Secondary transformation output power supply circuits A comprises a secondary winding T1D, a rectifier diode D1 and a commutation capacitor C1, wherein, the positive pole of rectifier diode D1 is connected with one end end points c of secondary winding T1D, the positive pole of commutation capacitor C1 is connected to the first tie point place between negative pole and the first output e of rectifier diode D1, and the negative pole of commutation capacitor C1 is connected to the second tie point place between other end end points d and the second Ausgang of secondary winding T1D.
The end points c that it should be noted that the secondary winding T1D in the end points b of the armature winding T1A in the first elementary translation circuit in main power flyback transformer 30 and secondary transformation output power supply circuits A is Same Name of Ends.
Further, if also need a road output power supply, can arrange as secondary transformation output power supply circuits B in Fig. 2, annexation between device and the each device comprising in these secondary transformation output power supply circuits B is all identical with secondary transformation output power supply circuits A, it should be noted that, the number of turn of secondary winding T1E in secondary transformation output power supply circuits B can be identical with the number of turn of T1D, also can be different, can arrange flexibly according to power demands.
The auxiliary power circuit that the present embodiment provides passes through three elementary translation circuits by different input dc power potential sources, through a main power conversion flyback transformer, the output of two secondary transformation output power supply circuits offers the direct current of the signal control circuit power supply of device interior, the each power tube in each elementary translation circuit is carried out in switch control procedure, use a control circuit to complete each elementary translation circuit control, and use driving transformer that control circuit and each power tube are isolated, the auxiliary power circuit circuit that this enforcement provides is simple, the number of devices using is less, thereby effectively save the cost of auxiliary power circuit, and, because multichannel input dc power potential source uses a main power conversion flyback transformer, so each elementary translation circuit power-sharing of auxiliary power circuit, current-sharing is effective, buffer action can be effectively played in the use of driving transformer, prevent the damage of control circuit.
Taking the structure shown in Fig. 2 as basis, the operation principle of auxiliary power circuit is carried out to brief description below: different input dc power potential source (E1, E2, E3) access respectively different elementary translation circuits, be in each elementary translation circuit, to include an input dc power potential source, the magnitude of voltage of each input dc power potential source can be the same or different, armature winding T1A in elementary translation circuit, T1B, T1C, with the secondary winding T1D in secondary transformation output power supply circuits, T1E, provide by a main power conversion flyback transformer T1, power tube (Q1 in each elementary translation circuit, Q2, Q3) when conducting, main power conversion flyback transformer T1 stored energy, power tube (Q1 in each elementary translation circuit, Q2, Q3) while shutoff, main power conversion flyback transformer T1 transferring energy, diode D1 and the D2 of secondary transformation output power supply circuits complete switching process, the high-quality direct voltage needing from the output of secondary transformation output power supply circuits, can realize the direct voltage that output need to be big or small by the secondary winding T1D of main power conversion flyback transformer T1 and the number of turn of T1E are set.In the auxiliary power circuit course of work; circuit instrument transformer in each elementary translation circuit is for obtaining the sample rate current value of each elementary translation circuit; and input using the sample rate current value of obtaining as control circuit; control circuit carries out switch control according to each sample rate current value to power tube; and then protect each power tube; between control circuit and power tube, be also connected with driving transformer, prevent that for carrying out high-low pressure isolation high voltage from damaging control circuit.Owing to there will be mutual inductance phenomenon between each elementary translation circuit, for preventing circulation between each elementary translation circuit, use diode D3, D4, D5 to prevent circulation phenomenon.
Finally it should be noted that: above each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the scope of the each embodiment technical scheme of the utility model.

Claims (5)

1. an auxiliary power circuit, is characterized in that, comprising:
At least two elementary translation circuits, each elementary translation circuit includes an armature winding, and a direct voltage source;
At least one secondary transformation output power supply circuits, each secondary transformation output power supply circuits include a secondary winding;
Main power conversion flyback transformer, described main power conversion flyback transformer is made up of the each secondary winding in the each armature winding in each elementary translation circuit and each secondary transformation output power supply circuits;
Control circuit, is electrically connected with each elementary translation circuit respectively, for each elementary translation circuit is carried out to switch control.
2. circuit according to claim 1, is characterized in that, the number of turn of each armature winding is identical or different, and the number of turn of each secondary winding is identical or different.
3. circuit according to claim 1 and 2, is characterized in that, each elementary translation circuit also comprises:
Diode, the positive pole of described diode is connected with the positive pole of described direct voltage source, and the negative pole of described diode is connected with one end of described armature winding;
Power tube, the first terminal of described power tube is connected with the other end of described armature winding;
Driving transformer, one end of described driving transformer is connected with the second terminal of described power tube, and the other end of described driving transformer is electrically connected with described control circuit, for described control circuit and described power tube are isolated;
Current transformer, between the 3rd terminal and the negative pole of described direct voltage source that are connected to described power tube of described current transformer, the output of described current transformer is electrically connected with described control circuit, for obtaining the sample rate current value of described elementary translation circuit, and described sample rate current value is flowed to described control circuit;
Described control circuit is specifically for carrying out switch control according to described sample rate current value to described power tube.
4. circuit according to claim 1 and 2, is characterized in that, each secondary transformation output power supply circuits also comprise:
Rectifier diode, the positive pole of described rectifier diode is connected with one end of described secondary winding;
Commutation capacitor, the positive pole of described commutation capacitor is connected to the first tie point place between the negative pole of described rectifier diode and the first output of described secondary transformation output power supply circuits; The negative pole of described commutation capacitor is connected to the second tie point place between the other end of described secondary winding and the second output of described secondary transformation output power supply circuits.
5. circuit according to claim 3, is characterized in that, described power tube is triode, corresponding, described the first terminal is collector electrode, and described the second terminal is base stage, and described the 3rd terminal is emitter;
Or described power tube is metal-oxide-semiconductor, corresponding, described the first terminal is drain electrode, and described the second terminal is grid, and described the 3rd terminal is source electrode.
CN201420395125.4U 2014-07-17 2014-07-17 Auxiliary power circuit Active CN204013230U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106961146A (en) * 2016-01-08 2017-07-18 伊顿制造(格拉斯哥)有限合伙莫尔日分支机构 Uninterrupted power source and its control power supply circuit
CN107517005A (en) * 2017-09-22 2017-12-26 厦门玛司特电子工业有限公司 A kind of high-low pressure synchronization active clamp change-over circuit and its control method
CN107733241A (en) * 2017-11-14 2018-02-23 深圳睿舍智能科技有限公司 Double primary side insulating power supplies
CN112260541A (en) * 2019-07-22 2021-01-22 维谛技术有限公司 Multi-winding coupling flyback converter and auxiliary power supply
CN112448468A (en) * 2019-09-05 2021-03-05 维谛技术有限公司 Power supply device and control method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106961146A (en) * 2016-01-08 2017-07-18 伊顿制造(格拉斯哥)有限合伙莫尔日分支机构 Uninterrupted power source and its control power supply circuit
CN106961146B (en) * 2016-01-08 2021-05-14 伊顿制造(格拉斯哥)有限合伙莫尔日分支机构 Uninterruptible power supply and control power supply circuit thereof
CN107517005A (en) * 2017-09-22 2017-12-26 厦门玛司特电子工业有限公司 A kind of high-low pressure synchronization active clamp change-over circuit and its control method
CN107733241A (en) * 2017-11-14 2018-02-23 深圳睿舍智能科技有限公司 Double primary side insulating power supplies
CN107733241B (en) * 2017-11-14 2024-01-26 深圳睿舍智能科技有限公司 Dual primary side isolated power supply
CN112260541A (en) * 2019-07-22 2021-01-22 维谛技术有限公司 Multi-winding coupling flyback converter and auxiliary power supply
CN112448468A (en) * 2019-09-05 2021-03-05 维谛技术有限公司 Power supply device and control method thereof
CN112448468B (en) * 2019-09-05 2023-11-28 维谛技术有限公司 Power supply device and control method thereof

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Owner name: SICON CHAT UNION ELECTRIC CO., LTD.

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Address after: Fourteenth, fifteenth building 319, 050035 Xiangjiang Road, hi tech Zone, Hebei, Shijiazhuang

Patentee after: SICON CHAT UNION ELECTRIC CO., LTD.

Address before: 050035, 15 floor, Tianshan science and Technology Industrial Park, 319 Xiangjiang Road, Hebei, Shijiazhuang

Patentee before: HEBEI SICON-EMI POWER SYSTEM CO., LTD.