CN1036745C - Power supply comprising at least two switching bridges - Google Patents
Power supply comprising at least two switching bridges Download PDFInfo
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- CN1036745C CN1036745C CN94103056A CN94103056A CN1036745C CN 1036745 C CN1036745 C CN 1036745C CN 94103056 A CN94103056 A CN 94103056A CN 94103056 A CN94103056 A CN 94103056A CN 1036745 C CN1036745 C CN 1036745C
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Abstract
A switching power supply for converting a mains voltage supplied by an electric mains into a desired output voltage comprises inter alia at least two bridge circuits (7), each of which comprises four branches which include switching elements (9) and a primary winding (19) of a transformer. Each bridge circuit (7) comprises two input terminals (13) which are connected to an input circuit (1). There are also provided coupling means which comprise a transformer core (121) which is common to at least two bridge circuits (7) and on which there are provided the primary transformer windings (19) associated with the relevant bridge circuits and a common secondary transformer winding in such a manner that the primary transformer windings are rigidly coupled to one another. There are provided at least two switching units (33) which comprise equal numbers of bridge circuits (7).
Description
The present invention relates to the switch mode power that a kind of line voltage by mains supply is transformed into desired output voltage, this power supply comprises:
A) input circuit is in order to be transformed into direct voltage with line voltage;
B) at least two bridge type circuit, each bridge circuit has four branch roads, and the switch element of band control electrode and the elementary winding of transformer are arranged in the branch road, and each described bridge circuit has two input terminals that are connected to input circuit;
C) control circuit, for producing control signal usefulness, the lead-out terminal of control circuit all is connected with the control electrode of each switch element;
D) coupling device, the transformer core that has at least a soft magnetic material to make, this coupling device is in order to coupled to each other with each primary transformers group of each bridge circuit;
E) output circuit, has a secondary transformer winding at least through transformer core and at least one primary transformers winding coupled, described coupling device has one to be at least two transformer cores that bridge circuit is shared, be wound with the primary transformers winding that interrelates with relevant bridge circuit on the iron core, also be wound with common secondary transformer winding, two kinds of winding techniques must make each primary transformers winding close-coupled each other, each input terminal of relevant each bridge circuit is connected in series on electric, thereby makes each bridge circuit constitute the switching device of two input terminals together.
Can recognize the situation of this power supply from the philips Power System catalogue 22-23 page or leaf of version in 1993.This known equipment has two bridge circuits, and the primary transformers winding of bridge circuit is all coupled to each other through transformer core.Therefore, the voltage at these Transformer Winding two ends is identical all the time, thereby the input voltage of two bridge circuits is also identical.When this equipment for example connect three phase mains through input circuit, the DirectCurrent Voltage Ratio that input circuit produced was higher.Fortunately the input voltage of each bridge circuit just in time is half of this high input voltage, thereby can adopt in each bridge circuit and be not suitable for extra-high voltage but more cheap general switch element.The electric power of this power supply supply only is subjected to the restriction of the temperature rise of transformer.Can select bigger transformer for use when supplying bigger electric power, but the volume of this power supply and price just increase unworthily also.
A kind of suitable bigger electric power that can provide than above-mentioned known power-supply device and employed transformer of providing of that the purpose of this invention is to provide that this specification proposes is at volume with the power-supply device of certain limit is still arranged in price.For reaching this purpose, the first embodiment of the present invention has such characteristics: be equipped with two switching mechanisms at least, this switching mechanism has the bridge circuit that quantity equates, the input terminal of described switching mechanism is connected in parallel on electric, and the secondary transformer winding relevant with each described switching mechanism is connected in series on electric.In this embodiment, the switching mechanism of any amount can be connected in parallel on electric, being connected in series of secondary transformer winding guaranteed that all primary transformers windings carry same electric current, thereby makes all bridge circuits make same contribution in the whole supply of electric power of power supply.
The second embodiment of the present invention has such characteristics: each bridge circuit relevant with switching mechanism has two primary transformers windings at least, these winding techniques are on the iron core of discrete transformer, each described transformer fe also is wound with the secondary transformer winding in the heart, and this secondary transformer winding is connected in series on electric.Because each bridge circuit of this embodiment has two transformers, thereby the electric power that is provided is doubled.In this embodiment, all elementary windings also are forced to carry same electric current.
Describe above-mentioned and others of the present invention with reference to the accompanying drawings in detail.
Fig. 1 shows the circuit diagram of known power source equipment, and power-supply device of the present invention is promptly based on this known power source equipment.
Fig. 2 shows the circuit diagram of power supply first embodiment of the present invention.
Fig. 3 shows the circuit diagram of the power supply second embodiment scheme of the present invention.
The schematic power supply of Fig. 1 has a known input circuit 1, and line voltage (for example 380 volts of voltages of three-phase) can be added to input circuit 1 through three input terminals 3, by power supply described line voltage is transformed into desired output voltage.Therefore input circuit 1 has a three-phase rectifier.The also suitable order phase mains supply of input circuit, in this case, input circuit has only two input terminals 3 and the simple rectification electric bridge with or without smoothing filter, for example resembles U.S. Pat, A-4, that described in 916,599 is a kind of.
Power-supply device also has two identical in structure bridge circuits 7.Each bridge circuit 7 has four branch roads, and each branch road also has switch element 9, and this switch element is formed by MOSFET (mos field effect transistor) in the present embodiment, and the grid 11 of MOSFET is as the control utmost point of switch element.Also can adopt the switch element of other form in case of necessity, for example bipolar transistor, controllable silicon and GTO (gate circuit cut-off switch).Each bridge circuit 7 has two input terminals 13 to be connected to the lead-out terminal 5 of input circuit 1.Be connected to the capacitor of using as buffer 14 between two input terminals 13 of each bridge circuit 7, bridge circuit promptly obtains its supply power voltage from this capacitor.Control circuit 15 is in order to produce the control signal of switch element 9.These control signals are obtained with lead-out terminal 17 that the control 11 of switch element 9 is connected by those of control circuit 15.At last, each bridge circuit 7 all has the elementary winding 19 of transformer.In each bridge circuit 7, the switch element 9 shown in Fig. 1 upper left side and the right bottom side constitutes first pair of switch element, and two other switch element constitutes second pair of switch element.Control circuit 15 control switch elements 9 make that the first couple and the second pair of switch element in each bridge circuit 7 replaces conducting on electric, and sense of current alternately flows from left to right and from right to left in the primary transformers winding 19 thereby make.Bridge circuit 7 and control circuit 15 have many known suitable embodiments, and what introduce among U.S. Pat-A-4916599 is exactly one of them example.
The primary transformers winding 19 of two bridge circuits 7 is wound on the public transformer core 121, and with this iron core magnetic coupling, also be wound with shared secondary transformer winding 123 on the iron core, this winding is then with rectification circuit 125 and filter 27,29, constitute output circuit, the lead-out terminal 31 of output circuit carries direct voltage.Primary transformers winding 19 all passes through transformer core 121 close-coupled each other.Owing to this close-coupled, add the equal turn numbers of two primary transformers windings 19, thereby the voltage at two winding two ends is under any circumstance also identical all the time.The input terminal 13 of two bridge circuits 7 is connected in series on electric, and promptly the positive input terminal of a bridge circuit connects negative input end of another bridge circuit.Therefore the buffer condenser 14 of bridge circuit 7 input ends also all is connected in series, and constitutes capacitive divider.Because the voltage at two primary transformers windings, 19 two ends is identical all the time, so the voltage at two buffer condensers, 14 two ends also equates.This point is in input circuit 1 particular importance when input terminal 3 connects 380 volts of three-phase mains power supplys.At this moment, input circuit 1 transmits 540 volts of direct voltages through lead-out terminal 5.This voltage is too high to general MOSFET, so have a bit very important.The input voltage that promptly should make each bridge circuit 7 just in time is half of input circuit 1 output voltage.Two or more bridge circuits 7 of pressing the mode shown in Fig. 2 and 3 through transformer 121 interconnection constitute switching mechanism together.This switching mechanism of the present invention can be used as the element of the power-supply device of the big electric power of suitable transmission.
Fig. 2 has schematically illustrated the embodiment of a power supply, and this power supply has two switching mechanisms 33, and each is made up of two bridge circuits 7 that are connected in series on electric.For simplicity's sake, 9 of the switch elements among the figure are symbolically represented with simple switch.For the same reason, input circuit 1 and control circuit 15 are not shown among the figure.Each switching mechanism 33 has two input terminals 113, and first that this just in time is connected in series with relevant bridge circuit 7 and last input terminal overlap.The input terminal of switching mechanism 33 is connected in parallel through wiring lead-in wire 35 on electric, and the secondary transformer group 123 relevant with each switching mechanism is connected in series on electric.Connection circuit 37 after secondary transformer winding 123 is connected in series.Similar with the embodiment shown in Fig. 1, circuit 37 can comprise a rectification circuit, but it also can be the external equipment by this power supply supplied alternating voltage.
In the embodiment shown in Figure 2, all primary transformers windings 19, the same with secondary transformer winding 123, have the same number of turn.Therefore, the electric current on all primary transformers windings 19 and the voltage at two ends all equate, thereby all bridge circuits are made same contribution in the power supply of power supply.Like this, this power supply can provide the electric power bigger four times than the situation of single bridge circuit 7.Need even when also wanting big electric power, install additional in each switching mechanism more bridge circuit also/or the more switches mechanism that interconnects in a manner described just be not difficult to increase the number of bridge circuit 7.
Fig. 3 shows second embodiment, and this embodiment has a switching mechanism 33 with many bridge circuits (being two in this example), and the input terminal 13 of bridge circuit is connected in series on electric.Here, in the series circuit in first input terminal 13 of first bridge circuit 7 and the series circuit last input terminal also constitute the input terminal 113 of switching mechanism 33.This power supply is also to illustrate with the same form of simplifying of Fig. 2.
In the embodiment shown in fig. 3, each bridge circuit 7 of the part of formation switching mechanism 33 has two primary transformers windings 19 that are wound on the discrete transformer iron core 121.These transformer cores 121 each all with primary transformers winding 19 (in the present embodiment the be two) coupling relevant with different bridge circuit 7.Each all is wound with secondary transformer winding 123 on these transformer cores 121, and this secondary transformer winding is connected in series on electric.With the same among the embodiment shown in Figure 2, this series circuit connection circuit 37.The equal turn numbers of all primary transformers windings 19, the number of turn of all secondary transformer windings also equates.
In the embodiment shown in fig. 3, flow through the electric current of all primary transformers windings 19 and the voltage at these winding two ends, same reason when embodiment illustrated in fig. 2 all equates for explanation.But in the present embodiment, each bridge circuit 7 has two primary transformers iron cores 19 that are wound on the discrete transformer iron core 121, so the electric power that each bridge circuit can transmit is the twice of Fig. 2 bridge circuit.Like this, the electric power of power delivery shown in Fig. 2 and 3 about equally, and the power-supply device shown in Fig. 3, its element (switch element 9) number is less, thereby cost can be smaller, and more compact.Equally, the number of bridge circuit 7 also can increase in the present embodiment.
Claims (2)
1. a switch mode power is transformed into desired output voltage in order to the line voltage that mains supply is supplied to come, and this power supply comprises;
A) input circuit (1) is in order to be transformed into direct voltage with line voltage;
B) at least two bridge circuits (7), each bridge circuit has four branch roads, and the switch element (9) of band control electrode (11) and the elementary winding (19) of transformer are arranged in the branch road, and each described bridge circuit has two input terminals (13) that connect input circuit;
C) control circuit (15), for producing control signal usefulness, the lead-out terminal of control circuit (17) is connected with the control electrode of each switch element;
D) coupling device, the transformer core (121) that has at least a soft magnetic material to make, this coupling device is in order to coupled to each other with each primary transformers winding of each bridge circuit;
E) output circuit, has a secondary transformer winding (123) at least through transformer core and at least one primary transformers winding coupled, described coupling device has one to be at least two transformer cores that bridge circuit is shared, be wound with the primary transformers winding that interrelates with relevant bridge circuit on the iron core, also be wound with shared secondary transformer winding, two kinds of winding techniques must make each primary transformers winding close-coupled each other, each input terminal of relevant each bridge circuit is connected in series on electric, thereby makes each bridge circuit constitute the switching mechanism (33) of two input terminals (113) together; It is characterized in that, at least two switching mechanisms (33) are equipped with, this switching mechanism has the bridge circuit (7) that quantity equates, the input terminal of described switching mechanism (113) is connected in parallel on electric, and the secondary transformer winding (123) relevant with each described switching mechanism is connected in series.
2. a switch mode power is transformed into desired output voltage in order to the line voltage that mains supply is supplied to come, and this power supply comprises:
A) input circuit (1) is in order to be transformed into direct voltage with line voltage;
B) at least two bridge circuits (7), each bridge circuit has four branch roads, and the switch element (9) of band control electrode (11) and the elementary winding (19) of transformer are arranged in the branch road, and each described bridge circuit has two input terminals (13) that connect input circuit;
C) control circuit (15), for producing control signal usefulness, the lead-out terminal of control circuit (17) all is connected with the control electrode of each switch element;
D) coupling device, the transformer core (121) that has at least a soft magnetic material to make, this coupling device is in order to coupled to each other with each primary transformers winding of each bridge circuit;
E) output circuit, has a secondary transformer winding (123) at least through transformer core and at least one primary transformers winding coupled, described coupling device has one to be at least two transformer cores that bridge circuit is shared, be wound with the primary transformers winding that interrelates with relevant bridge circuit on the iron core, also be wound with shared secondary transformer winding, two kinds of winding techniques must make each primary transformers winding close-coupled each other, each input terminal of relevant each bridge circuit is connected in series on electric, thereby makes each bridge circuit constitute the switching mechanism (33) of two input terminals (113) together; It is characterized in that, each bridge circuit relevant with switching mechanism (33) has two primary transformers windings (19) at least, these winding techniques are on discrete transformer iron core (121), each described transformer fe also is wound with secondary transformer winding (123) in the heart, and this secondary transformer winding is connected in series on electric.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP93200812 | 1993-03-19 | ||
| EP93200812.1 | 1993-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1092567A CN1092567A (en) | 1994-09-21 |
| CN1036745C true CN1036745C (en) | 1997-12-17 |
Family
ID=8213712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94103056A Expired - Fee Related CN1036745C (en) | 1993-03-19 | 1994-03-16 | Power supply comprising at least two switching bridges |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH06351253A (en) |
| CN (1) | CN1036745C (en) |
| DE (1) | DE69407637T2 (en) |
| TW (1) | TW310496B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5682611B2 (en) * | 2012-11-09 | 2015-03-11 | トヨタ自動車株式会社 | Power converter and failure detection method for power converter |
| JP5741558B2 (en) * | 2012-11-09 | 2015-07-01 | トヨタ自動車株式会社 | Power converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4916599A (en) * | 1989-03-29 | 1990-04-10 | Hyperpower, Inc. | Switching power supply |
| EP0390184A2 (en) * | 1989-03-31 | 1990-10-03 | Kabushiki Kaisha Toshiba | Improvements in variable-voltage & variable-frequency power converter |
-
1994
- 1994-03-14 DE DE1994607637 patent/DE69407637T2/en not_active Expired - Fee Related
- 1994-03-16 CN CN94103056A patent/CN1036745C/en not_active Expired - Fee Related
- 1994-03-16 JP JP6045854A patent/JPH06351253A/en active Pending
- 1994-04-08 TW TW83103068A patent/TW310496B/zh active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4916599A (en) * | 1989-03-29 | 1990-04-10 | Hyperpower, Inc. | Switching power supply |
| EP0390184A2 (en) * | 1989-03-31 | 1990-10-03 | Kabushiki Kaisha Toshiba | Improvements in variable-voltage & variable-frequency power converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06351253A (en) | 1994-12-22 |
| DE69407637D1 (en) | 1998-02-12 |
| TW310496B (en) | 1997-07-11 |
| CN1092567A (en) | 1994-09-21 |
| DE69407637T2 (en) | 1998-06-25 |
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| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: N.V. PHILIPS OPTICAL LAMP MANUFACTURING COMPANY TO: N.V. PHILIPS OPTICALLAMP LTD., CO. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Philips Electronics N. V. Patentee before: N.V. Philips' Gloeipenfabrieken |
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| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: N.V. PHILIPS OPTICAL LAMP LTD., CO. TO: ROYAL PHILIPS ELECTRONICS CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Koninklike Philips Electronics N. V. Patentee before: Philips Electronics N. V. |
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| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: ROYAL PHILIPS ELECTRONICS CO., LTD. TO: INDUSTRY AND TELECOMMUNICATIONS SYSTEMS CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: Wavre in Belgium Patentee after: Industrial and Telecommunications Systems Ltd Address before: Holland Ian Deho Finn Patentee before: Koninklike Philips Electronics N. V. |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |