WO1990013177A1 - Circuits with switching protection and parts therefor - Google Patents
Circuits with switching protection and parts therefor Download PDFInfo
- Publication number
- WO1990013177A1 WO1990013177A1 PCT/AU1990/000152 AU9000152W WO9013177A1 WO 1990013177 A1 WO1990013177 A1 WO 1990013177A1 AU 9000152 W AU9000152 W AU 9000152W WO 9013177 A1 WO9013177 A1 WO 9013177A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- controlled
- load
- resonant circuit
- transistors
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
Definitions
- an electrical circuit with switching protection comprising: a controlled circuit having an input of fixed frequency and including switching devices, the controlled circuit being adapted to produce one or more outputs of a frequency different to the input by the switching devices; an electrical load connected to the one or each outputs &£ the controlled circuit; and a resonant circuit connected to the one or each outputs of the controlled circuit, wherein, the resonant circuit is operable to cooperate with the load to provide the controlled circuit in an advantageous condition for activation of the switching devices at a change of state.
- the sources for the bridge circuit 10 are the two DC supply voltages V + and V —. It is equally possible to provide for the supply voltage to be of a frequency other than
- the bridge circuit 10 is formed by two limbs, each of which comprises a pair of switching devices in the form of bipolar junction transistors 12.
- the first limb is
- the bridge circuit 10 is formed by two limbs, each of which comprises a pair of switching devices in the form of bipolar junction transistors 12.
- the first limb is constituted by transistors Q1A and Q2A and the second limb by transistors QlB and Q2B.
- Each of the transistors 12 is provided with a free wheeling diode 14, being variously D1A, D2A, DIB and D2B.
- transistors have been shown in the limbs of the bridge, it would be equally applicable to substitute other semiconductor devices which can be switched-off via a control electrode, such as GTO's or IGFET's.
- FIG. 2 shows the condition of transistors Q1A and Q2B conducting. This corresponds to any particular one of the pulses V in the positive half-cycle of the output voltage waveform V Q as shown in Figure 1.
- load current I ⁇ flows from the supply V through the inductive load 50 returning to the input supply V as shown.
- the voltage appearing between the output terminals V, and V ⁇ would be close to 2*V , allowing for collector-emitter voltage drops in transistors QLA and Q2B, as well as the voltage drop across resistors RSA and RSB.
- Figure 4 shows the near continuous load current I_ together with current through inductor LC and the load voltage between output terminals V, and V ⁇ .
- the section A-B in Figure 4 represents the increase of current through inductor LC up to a point where it is equal to the load current I ⁇ . After this point, the current through inductor LC continues to increase following a resonant trajectory B-C for a period of l/(4*7f*,/(LC*CS) ) due to the resonant circuit formed between inductor LC and capacitors CS2 and CS3.
- transistors 22 and diodes 24 in the resonant circuit 30 are rated with the equivalent forward current rating of the load, however the advantages of low stress switching and the elimination of commutation clamp rails are sufficient to justify the extra cost when operating at high switching frequency associated with PWM techniques.
- This example allows one simultaneous state change from a present state to the diagonally opposite state. All other state combination must be as a result of switch-off of the bridge transistors in the three phase inverter 60 from the opposite state.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Burglar Alarm Systems (AREA)
- Interface Circuits In Exchanges (AREA)
- Electronic Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPJ375189 | 1989-04-18 | ||
AUPJ3751 | 1989-04-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1990013177A1 true WO1990013177A1 (en) | 1990-11-01 |
Family
ID=3773860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1990/000152 WO1990013177A1 (en) | 1989-04-18 | 1990-04-18 | Circuits with switching protection and parts therefor |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0469003A4 (en) |
JP (1) | JPH04506895A (en) |
AU (1) | AU631861B2 (en) |
CA (1) | CA2051668A1 (en) |
WO (1) | WO1990013177A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108781076A (en) * | 2016-03-15 | 2018-11-09 | 理想能量有限公司 | Biradical pole linking bipolar transistor with the passive components for preventing from being surprisingly connected |
CN115184763A (en) * | 2022-09-09 | 2022-10-14 | 佛山市联动科技股份有限公司 | Protection device, control method thereof and avalanche testing device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2812474B1 (en) * | 2000-07-31 | 2004-06-18 | Valeo Climatisation | DEVICE FOR PROTECTING AN ELECTRIC SOURCE CAPABLE OF SUPPLYING AN ELECTRICAL MEMBER |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1016382A (en) * | 1962-10-31 | 1966-01-12 | British Telecomm Res Ltd | Improvements in or relating to electrical signalling systems |
GB1472007A (en) * | 1975-01-23 | 1977-04-27 | Burroughs Corp | Drive system for switched inductive loads particularly for multi-phase stepping motors |
GB2015291A (en) * | 1978-02-03 | 1979-09-05 | Mawdsleys Ltd | Improvements in electrical switching circuits using transistors |
US4288738A (en) * | 1980-04-03 | 1981-09-08 | Tektronix, Inc. | Dual-mode amplifier |
US4446513A (en) * | 1980-06-13 | 1984-05-01 | La Telemecanique Electrique | DC/AC Bridge inverter including a switching aid and inductive energy recovery circuit |
GB2199202A (en) * | 1986-12-24 | 1988-06-29 | Ferranti Plc | Electric power regulator snubber circuit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0010811A1 (en) * | 1978-10-28 | 1980-05-14 | Westinghouse Brake And Signal Company Limited | Switching transistor over-voltage protection means |
US4626980A (en) * | 1984-05-17 | 1986-12-02 | Square D Company | Power bridge having a non-dissipative snubber circuit |
US4691270A (en) * | 1986-07-22 | 1987-09-01 | Rca Corporation | Current fed inverter bridge with lossless snubbers |
DE3639495A1 (en) * | 1986-11-20 | 1988-05-26 | Licentia Gmbh | Circuitry for the switches of pulse-controlled invertors and DC semiconductor controllers for multi-quadrant operation |
-
1990
- 1990-04-18 CA CA002051668A patent/CA2051668A1/en not_active Abandoned
- 1990-04-18 WO PCT/AU1990/000152 patent/WO1990013177A1/en not_active Application Discontinuation
- 1990-04-18 JP JP2506287A patent/JPH04506895A/en active Pending
- 1990-04-18 EP EP19900906060 patent/EP0469003A4/en not_active Withdrawn
- 1990-04-18 AU AU54497/90A patent/AU631861B2/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1016382A (en) * | 1962-10-31 | 1966-01-12 | British Telecomm Res Ltd | Improvements in or relating to electrical signalling systems |
GB1472007A (en) * | 1975-01-23 | 1977-04-27 | Burroughs Corp | Drive system for switched inductive loads particularly for multi-phase stepping motors |
GB2015291A (en) * | 1978-02-03 | 1979-09-05 | Mawdsleys Ltd | Improvements in electrical switching circuits using transistors |
US4288738A (en) * | 1980-04-03 | 1981-09-08 | Tektronix, Inc. | Dual-mode amplifier |
US4446513A (en) * | 1980-06-13 | 1984-05-01 | La Telemecanique Electrique | DC/AC Bridge inverter including a switching aid and inductive energy recovery circuit |
GB2199202A (en) * | 1986-12-24 | 1988-06-29 | Ferranti Plc | Electric power regulator snubber circuit |
Non-Patent Citations (1)
Title |
---|
See also references of EP0469003A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108781076A (en) * | 2016-03-15 | 2018-11-09 | 理想能量有限公司 | Biradical pole linking bipolar transistor with the passive components for preventing from being surprisingly connected |
CN108781076B (en) * | 2016-03-15 | 2022-08-09 | 理想能量有限公司 | Bipolar transistor with passive components for preventing accidental turn-on |
CN115184763A (en) * | 2022-09-09 | 2022-10-14 | 佛山市联动科技股份有限公司 | Protection device, control method thereof and avalanche testing device |
Also Published As
Publication number | Publication date |
---|---|
CA2051668A1 (en) | 1990-10-19 |
AU5449790A (en) | 1990-11-16 |
EP0469003A4 (en) | 1992-10-28 |
JPH04506895A (en) | 1992-11-26 |
EP0469003A1 (en) | 1992-02-05 |
AU631861B2 (en) | 1992-12-10 |
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