CN204068707U - A kind of parallel power supply system for fault detect and power module thereof - Google Patents
A kind of parallel power supply system for fault detect and power module thereof Download PDFInfo
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- CN204068707U CN204068707U CN201420342594.XU CN201420342594U CN204068707U CN 204068707 U CN204068707 U CN 204068707U CN 201420342594 U CN201420342594 U CN 201420342594U CN 204068707 U CN204068707 U CN 204068707U
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Abstract
The utility model relates to a kind of parallel power supply system for fault detect and power module thereof, each power module comprises a phase whole-bridging circuit, the output of phase whole-bridging circuit connects main transformer (Tr) former limit, and main transformer (Tr) secondary connects rectifying output circuit; The output of the arrangement output circuit of each power module is in parallel, and also comprise a failure detector circuit, failure detector circuit comprises a voltage detecting circuit, for detecting the output voltage of phase whole-bridging circuit; And a drive circuit, for changing the feedback resistance of voltage feedback network; Described voltage detecting circuit exports drive circuit described in control connection.Voltage detecting circuit detects that output voltage is less, exports adjustment feedback network, and adjustment voltage close loop, output voltage is raised, and module will restart raises voltage, makes output voltage reach balance, to realize the startup of power module.
Description
Technical field
The utility model relates to a kind of parallel power supply system, and parallel power supply system is made up of multiple single supply wired in parallel; The particularly fault detection part of single supply module.
Background technology
At present, State Grid Corporation of China promotes the development of electric motorcar charging station energetically, the follow-up of the powerful electric automobile battery charger of demand for development of electrokinetic cell.The lagging in development of current power semiconductor, powerful charger needs the parallel connection of multi-power module, in the power module of parallel connection, there is startup sequence problem in modules, the power module output voltage first started can, the power module output voltage clamp of rear startup, cause the power module starting sequential delayed to start.
At present, the measure taked has: (1) adds at output and cuts off diode (see accompanying drawing 1), and the power consumption that this measure cuts off on diode in High-current output occasion is comparatively large, causes efficiency not increase; (2) add D.C. contactor (see accompanying drawing 2) at output, heavy DC contactor cost is higher, and volume is comparatively large, and need increase by tunnel isolation drive power supply, this measure decreases device Available volume, adds holistic cost.
Need a kind of new solution badly, to solve the defect that above-mentioned two kinds of measures exist.
Utility model content
The purpose of this utility model is to provide a kind of parallel power supply system for fault detect and power module thereof, in order to solve the defect of existing measure.
For achieving the above object, scheme of the present utility model comprises:
A kind of parallel power supply system for fault detect, comprise at least two power modules, each power module comprises a phase whole-bridging circuit, and the output of phase whole-bridging circuit connects main transformer (Tr) former limit, and main transformer (Tr) secondary connects rectifying output circuit; The output of the arrangement output circuit of each power module is in parallel, and also comprise a failure detector circuit, failure detector circuit comprises a voltage detecting circuit, for detecting the output voltage of phase whole-bridging circuit; And a drive circuit, for changing the feedback resistance of voltage feedback network; Described voltage detecting circuit exports drive circuit described in control connection.
Described voltage detecting circuit comprises an isolating transformer (Tr1), the former limit of isolating transformer (Tr1) connects the output of full-bridge circuit, isolating transformer (Tr1) secondary drives connection sense switch pipe (Q5) by a rectifier bridge (D7, D8, D9, D10), and the output of sense switch pipe (Q5) is connected to the I/O port of a MCU.
Isolating transformer (Tr1) former limit is in series with capacitance Cr, for preventing isolating transformer (Tr1) magnetic bias.
Drive circuit comprises a driving switch pipe (Q6) and parallel feedback network, and MCU drived control connects described driving switch pipe (Q6), and driving switch pipe (Q6) connects parallel feedback network; This feedback network is by two parallel feedback resistance (R
f2, R
f1) composition, during Q6 conducting, feedback resistance is R
f2, R
f1parallel connection, Q6 cut-off time, feedback resistance is R
f1.
Described sense switch pipe (Q5), driving switch pipe (Q6) are MOSFET or triode.
For a power module for fault detect, power module comprises a phase whole-bridging circuit, and the output of phase whole-bridging circuit connects main transformer (Tr) former limit, and main transformer (Tr) secondary connects rectifying output circuit; The output of the arrangement output circuit of each power module is in parallel, and also comprise a failure detector circuit, failure detector circuit comprises a voltage detecting circuit, for detecting the output voltage of phase whole-bridging circuit; And a drive circuit, for changing the feedback resistance of voltage feedback network; Described voltage detecting circuit exports drive circuit described in control connection.
Described voltage detecting circuit comprises an isolating transformer (Tr1), the former limit of isolating transformer (Tr1) connects the output of full-bridge circuit, isolating transformer (Tr1) secondary drives connection sense switch pipe (Q5) by a rectifier bridge (D7, D8, D9, D10), and the output of sense switch pipe (Q5) is connected to the I/O port of a MCU.
Isolating transformer (Tr1) former limit is in series with capacitance Cr, for preventing isolating transformer (Tr1) magnetic bias.
Drive circuit comprises a driving switch pipe (Q6) and parallel feedback network, and MCU drived control connects described driving switch pipe (Q6), and driving switch pipe (Q6) connects parallel feedback network; This feedback network is by two parallel feedback resistance (R
f2, R
f1) composition, during Q6 conducting, feedback resistance is R
f2, R
f1parallel connection, Q6 cut-off time, feedback resistance is R
f1.
Described sense switch pipe (Q5), driving switch pipe (Q6) are MOSFET or triode.
Voltage detecting circuit detects that output voltage is less, exports adjustment feedback network, and adjustment voltage close loop, output voltage is raised, and module will restart raises voltage, makes output voltage reach balance, to realize the startup of power module.
Accompanying drawing explanation
Fig. 1 is the resolution circuitry schematic diagram adopting diode in prior art;
Fig. 2 is the resolution circuitry schematic diagram adopting contactor in prior art;
Fig. 3 is the circuit theory diagrams of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
A kind of parallel power supply system embodiment, as shown in Figure 3, circuit part shows phase whole-bridging circuit, transformer and rectifying output circuit to its single power module, and the importation of phase whole-bridging circuit and the utility model scheme have nothing to do, therefore do not draw.The output of several power modules, namely the output (Vo) of rectifying output circuit is in parallel, forms parallel power supply system.
Full-bridge circuit comprises switching tube Q1, Q2, Q3, Q4, and full-bridge exports through the former limit of transformer Tr, and Tr secondary connects rectification circuit, comprises rectifier diode D
r1, D
r2, inductance L
f, electric capacity C
fdeng.
Whether fault detection part of the present utility model, normally start for detecting power module, lower mask body introduces circuit theory and the course of work.
In this enforcement, increase a voltage detecting circuit, for detecting the output voltage of phase whole-bridging circuit; And drive circuit, for changing the feedback resistance of voltage feedback network.
Concrete, voltage detecting circuit comprises an isolating transformer Tr1, and Tr1 withstand voltage is the former secondary withstand voltage of main converter, and the former limit of Tr1 is connected on the output terminals A of full-bridge circuit, B, can sample A, B two point voltage signal play buffer action simultaneously.Be connected on the capacitance Cr on the former limit of isolating transformer Tr1, for preventing Tr1 magnetic bias, have no progeny advanced arm Q1 (or Q2) closing, the voltage above Cr can make Tr1 primary current get back to zero point.Tr1 secondary drives connection switching tube Q5 by a rectifier bridge (D7, D8, D9, D10), and the output of Q5 is connected to the I/O port of MCU.
Drive circuit comprises a switching tube Q6 and parallel feedback network, the level that MCU exports according to Q5, and drived control switching tube Q6, Q6 control parallel feedback network, and this feedback network is by R
f2, R
f1composition, during Q6 conducting, feedback resistance is R
f2, R
f1parallel connection, Q6 cut-off time, feedback resistance is R
f1.Switching tube Q5, Q6 is characterized in that it can being MOSFET, also can be transistors.
Above-mentioned feedback network belongs to voltage feedback network, voltage close loop for the power module of correspondence controls, during voltage close loop controls, feedback resistance is for affecting input reference, input reference changes, causing closed loop voltage to control to redefine control objectives, restarting with the power module realized failing to start.Because voltage close loop controls to belong to this area routine techniques, so overall control circuit not shown in FIG., provide only feedback network and form.
Specific works principle is as follows: when Q1, Q4 or Q2, Q3 conducting, namely main converter can start, A, B point-to-point transmission can produce a square wave, and this square wave is added in transformer Tr1 two ends, and secondary passes through step-down, a direct current pressure drop is obtained after rectifying tube D7, D8, D9, D10, this pressure drop driven MOS FET Q5 conducting, microprocessor detect is to low level signal, and acquiescence converter starts, Q6 is without drive singal not conducting, and Voltage Feedback resistance is R
f1, converter normally works.When converter does not start, Q1, Q4 not conducting, Tr1 cannot detect the voltage of A, B 2, switching tube Q5 without drive singal then not conducting, microprocessor detect to high level signal, system validation fault, then Q6 drive singal is high conducting, and at this moment output voltage feedback resistance is Q6, R
f2, R
f1the parallel feedback network of composition, feedback resistance is R
f2, R
f1gained in parallel, feedback resistance detects that output voltage is less, adjustment voltage close loop, output voltage is raised, and module will restart raises voltage, makes output voltage reach balance, to realize the startup of power module.
About power module embodiment, owing to introducing in detail in the power supply system, repeat no more.
Be presented above concrete execution mode, but the utility model is not limited to described execution mode.Basic ideas of the present utility model are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present utility model, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out execution mode when not departing from principle of the present utility model and spirit, amendment, replacement and modification still fall in protection range of the present utility model.
Claims (10)
1. the parallel power supply system for fault detect, comprise at least two power modules, each power module comprises a phase whole-bridging circuit, the output of phase whole-bridging circuit connects main transformer (Tr) former limit, and main transformer (Tr) secondary connects rectifying output circuit; The output of the arrangement output circuit of each power module is in parallel, and it is characterized in that, also comprise a failure detector circuit, failure detector circuit comprises a voltage detecting circuit, for detecting the output voltage of phase whole-bridging circuit; And a drive circuit, for changing the feedback resistance of voltage feedback network; Described voltage detecting circuit exports drive circuit described in control connection.
2. a kind of parallel power supply system for fault detect according to claim 1, it is characterized in that, described voltage detecting circuit comprises an isolating transformer (Tr1), the former limit of isolating transformer (Tr1) connects the output of full-bridge circuit, isolating transformer (Tr1) secondary drives connection sense switch pipe (Q5) by a rectifier bridge (D7, D8, D9, D10), and the output of sense switch pipe (Q5) is connected to the I/O port of a MCU.
3. a kind of parallel power supply system for fault detect according to claim 2, is characterized in that, isolating transformer (Tr1) former limit is in series with capacitance Cr, for preventing isolating transformer (Tr1) magnetic bias.
4. a kind of parallel power supply system for fault detect according to claim 1, it is characterized in that, drive circuit comprises a driving switch pipe Q6 and parallel feedback network, and MCU drived control connects described driving switch pipe Q6, and driving switch pipe Q6 connects parallel feedback network; This feedback network is by two parallel feedback resistance R
f2, R
f1composition, during Q6 conducting, feedback resistance is R
f2, R
f1parallel connection, Q6 cut-off time, feedback resistance is R
f1.
5. a kind of parallel power supply system for fault detect according to claim 4, is characterized in that, described sense switch pipe (Q5), driving switch pipe Q6 are MOSFET or triode.
6. for a power module for fault detect, power module comprises a phase whole-bridging circuit, and the output of phase whole-bridging circuit connects main transformer (Tr) former limit, and main transformer (Tr) secondary connects rectifying output circuit; The output of the arrangement output circuit of each power module is in parallel, and it is characterized in that, also comprise a failure detector circuit, failure detector circuit comprises a voltage detecting circuit, for detecting the output voltage of phase whole-bridging circuit; And a drive circuit, for changing the feedback resistance of voltage feedback network; Described voltage detecting circuit exports drive circuit described in control connection.
7. a kind of power module for fault detect according to claim 6, it is characterized in that, described voltage detecting circuit comprises an isolating transformer (Tr1), the former limit of isolating transformer (Tr1) connects the output of full-bridge circuit, isolating transformer (Tr1) secondary drives connection sense switch pipe (Q5) by a rectifier bridge (D7, D8, D9, D10), and the output of sense switch pipe (Q5) is connected to the I/O port of a MCU.
8. a kind of power module for fault detect according to claim 7, is characterized in that, isolating transformer (Tr1) former limit is in series with capacitance Cr, for preventing isolating transformer (Tr1) magnetic bias.
9. a kind of power module for fault detect according to claim 6, it is characterized in that, drive circuit comprises a driving switch pipe Q6 and parallel feedback network, and MCU drived control connects described driving switch pipe Q6, and driving switch pipe Q6 connects parallel feedback network; This feedback network is by two parallel feedback resistance R
f2, R
f1composition, during Q6 conducting, feedback resistance is R
f2, R
f1parallel connection, Q6 cut-off time, feedback resistance is R
f1.
10. a kind of power module for fault detect according to claim 9, is characterized in that, described sense switch pipe (Q5), driving switch pipe Q6 are MOSFET or triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420342594.XU CN204068707U (en) | 2014-06-24 | 2014-06-24 | A kind of parallel power supply system for fault detect and power module thereof |
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|---|---|---|---|
| CN201420342594.XU CN204068707U (en) | 2014-06-24 | 2014-06-24 | A kind of parallel power supply system for fault detect and power module thereof |
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| CN204068707U true CN204068707U (en) | 2014-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113217A (en) * | 2014-06-24 | 2014-10-22 | 许继电气股份有限公司 | Parallel power supply system for fault detection and power supply modules thereof |
-
2014
- 2014-06-24 CN CN201420342594.XU patent/CN204068707U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113217A (en) * | 2014-06-24 | 2014-10-22 | 许继电气股份有限公司 | Parallel power supply system for fault detection and power supply modules thereof |
| CN104113217B (en) * | 2014-06-24 | 2018-01-09 | 许继电气股份有限公司 | Parallel power supply system and its power module for fault detect |
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