WO2015019448A1 - 半導体スイッチング装置 - Google Patents
半導体スイッチング装置 Download PDFInfo
- Publication number
- WO2015019448A1 WO2015019448A1 PCT/JP2013/071388 JP2013071388W WO2015019448A1 WO 2015019448 A1 WO2015019448 A1 WO 2015019448A1 JP 2013071388 W JP2013071388 W JP 2013071388W WO 2015019448 A1 WO2015019448 A1 WO 2015019448A1
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- WO
- WIPO (PCT)
- Prior art keywords
- switching element
- circuit
- signal
- switching
- load
- Prior art date
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0828—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in composite switches
Definitions
- the present invention relates to a semiconductor switching device used for power conversion or inverter control of electric railway or power transmission.
- an arm short circuit When an arm short circuit occurs in a semiconductor switching device, it can be safely turned off by detecting the short circuit within a specified period. However, when a load short circuit occurs, the gate-emitter voltage is likely to rise compared to an arm short circuit, and the saturation current of the main current flowing through the semiconductor switching device continues to increase. In addition, compared with an arm short circuit, the gate-emitter control voltage VGE between the chips induced by the main current di / dt varies, and the main current flowing between the chips tends to vary.
- FIG. 4 is a diagram showing measured waveforms of current and voltage when a load short circuit occurs and the semiconductor switching device is destroyed.
- VCE is a collector-emitter voltage
- IC1 to IC3 are collector currents of three switching elements connected in parallel. IC1 to IC3 become unbalanced, current concentrates on a certain switching element, and latchup breakdown or thermal breakdown occurs.
- the load short circuit tends to increase the saturation current compared to the arm short circuit, and there is a risk that an imbalance of the shunt current flowing between the chips may occur, leading to latch-up breakdown and turn-off breakdown.
- an apparatus has been proposed in which when a load short-circuit occurs, the arm is short-circuited using a third switch provided on the load side to prevent destruction due to the load short-circuit (for example, see Patent Document 1).
- the present invention has been made to solve the above-described problems, and an object thereof is to obtain a semiconductor switching device that facilitates control for preventing breakdown due to load short-circuiting and can reduce the number of components. is there.
- the semiconductor switching device includes a first switching element connected in parallel to a load, a second switching element connected between the first switching element and a ground point, and the first switching element.
- a first drive circuit that drives a switching element; a second drive circuit that drives the second switching element; a load short-circuit detection circuit that outputs a first signal when a load short-circuit is detected; And a timer that outputs a second signal after a predetermined time from the input of the signal, and the first driving circuit turns on the first switching element when the first signal is input, and the second driving circuit
- the drive circuit of the above is characterized in that when the second signal is inputted, the second switching element is turned off.
- control for preventing breakage due to load short-circuiting can be facilitated, and the number of parts can be reduced.
- FIG. 1 is a circuit diagram showing a semiconductor switching device according to a first embodiment of the present invention.
- 3 is a timing chart showing the operation of the semiconductor switching device according to the first embodiment of the present invention.
- It is a circuit diagram which shows the semiconductor switching apparatus which concerns on Embodiment 2 of this invention.
- It is a figure which shows the actual measurement waveform of an electric current and a voltage when load short circuit generate
- FIG. 1 is a circuit diagram showing a semiconductor switching device according to Embodiment 1 of the present invention.
- Switching element A is connected to load L in parallel.
- a switching element B is connected between the switching element A and a ground point.
- the switching elements A and B are IGBTs (Insulated Gate Bipolar Transistors), but are not limited thereto, and may be transistors or MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors), and the material may be Si or SiC.
- IGBTs Insulated Gate Bipolar Transistors
- MOSFETs Metal-Oxide-Semiconductor Field-Effect Transistors
- the driving circuit 1 drives the switching element A
- the driving circuit 2 drives the switching element B.
- Freewheel diodes D1 and D2 are connected in parallel to switching elements A and B, respectively.
- a capacitor C and a power source are connected in parallel to the switching elements A and B.
- the main current path is (1) and a load short circuit occurs.
- the load short-circuit detection circuit 3 determines that the load is short-circuited and outputs a first signal.
- the load short-circuit detection circuit 3 includes a constant current source 4 connected to a power source having a voltage V2, a diode Dm, and a comparator 5.
- VCE of the switching element B is smaller than V2
- the current from the constant current source 4 flows to the collector of the switching element B through the diode Dm.
- VCE becomes larger than V2
- the comparator 5 detects VCE> V1 and outputs the first signal.
- the drive circuit 1 turns on the switching element A when the first signal is input.
- the path of the main current is (2) and an arm short circuit occurs.
- the timer 6 outputs the second signal after a predetermined time (several ⁇ s) after inputting the first signal.
- the drive circuit 2 turns off the switching element B and interrupts the short-circuit current.
- FIG. 2 is a timing chart showing the operation of the semiconductor switching device according to the first embodiment of the present invention.
- the collector currents of the switching elements A and B are Ic, the gate-emitter voltage is VGE, and the collector-emitter voltage is VCE.
- switching elements A and B are OFF during period a.
- the switching element B is turned on, the main current flows through the path (1) passing through the shorted load L, and a load short circuit occurs.
- t time
- V voltage
- the switching element A is turned ON, and the path (2) flowing through the switching elements A and B is formed, causing an arm short circuit.
- the VGE of the switching element A is stable in the applied voltage state, and the short-circuit current is saturated according to the transfer characteristics.
- the VGE lift of the switching element B is eliminated, and current imbalance between chips is eliminated.
- VCE moves to switching element B having a high temperature and a high resistance.
- the switching elements A and B are turned off again during the period d. The current that flows through the switching element B is suppressed, and the current imbalance between the chips is eliminated, so that it can be safely cut off by performing the turn-off.
- switching element A when a load short circuit occurs, switching element A is turned on to cause an arm short circuit, and after a predetermined time, switching element B is turned off.
- the gate-emitter control voltage can be prevented from increasing and the saturation current can be prevented from being turned off safely.
- the load short circuit can be eliminated by using an existing circuit. Therefore, compared with the prior art, control for preventing breakage due to a load short circuit can be facilitated, and the number of components can be reduced.
- the load short circuit can be detected with high accuracy.
- the voltage between the collector electrode 9 and the emitter electrode 10 may be measured. Note that the same effect as in the first embodiment can be obtained by using n switching elements connected in series in a closed circuit instead of the switching element A.
- FIG. FIG. 3 is a circuit diagram showing a semiconductor switching device according to the second embodiment of the present invention.
- n switching elements A-1,..., An are connected in parallel to each other.
- Drive circuits 1-1,..., 1-n drive switching elements A-1,.
- n switching elements B-1,..., Bn are connected in parallel to each other.
- Drive circuits 2-1,..., 2-n drive the switching elements B-1,.
- the drive circuits 1-1,..., 1-n (here, the drive circuit 1-1) turn on only the switching element A-1. Thereby, when the load short circuit is switched to the arm short circuit, the short circuit current flowing through the switching elements B-1,..., Bn can be reduced to 1 / n and can be safely cut off.
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- Electronic Switches (AREA)
- Power Conversion In General (AREA)
Abstract
Description
図1は、本発明の実施の形態1に係る半導体スイッチング装置を示す回路図である。スイッチング素子Aが負荷Lに並列に接続されている。スイッチング素子Bがスイッチング素子Aと接地点との間に接続されている。スイッチング素子A,BはIGBT(Insulated Gate Bipolar Transistor)であるが、これに限らずトランジスタ又はMOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor)でもよく、その材質はSiでもSiCでもよい。
図3は、本発明の実施の形態2に係る半導体スイッチング装置を示す回路図である。n個のスイッチング素子A-1,・・・,A-nが互いに並列に接続されている。駆動回路1-1,・・・,1-nがそれぞれスイッチング素子A-1,・・・,A-nを駆動する。n個のスイッチング素子B-1,・・・,B-nが互いに並列に接続されている。駆動回路2-1,・・・,2-nがそれぞれスイッチング素子B-1,・・・,B-nを駆動する。
Claims (4)
- 負荷に並列に接続された第1のスイッチング素子と、
前記第1のスイッチング素子と接地点との間に接続された第2のスイッチング素子と、
前記第1のスイッチング素子を駆動する第1の駆動回路と、
前記第2のスイッチング素子を駆動する第2の駆動回路と、
負荷短絡を検出すると第1の信号を出力する負荷短絡検出回路と、
前記第1の信号を入力してから所定時間後に第2の信号を出力するタイマーとを備え、
前記第1の駆動回路は、前記第1の信号を入力すると前記第1のスイッチング素子をONさせ、
前記第2の駆動回路は、前記第2の信号を入力すると前記第2のスイッチング素子をOFFさせることを特徴とする半導体スイッチング装置。 - 前記負荷短絡検出回路は、前記第2のスイッチング素子のコレクタ-エミッタ間電圧が所定電圧を超えると前記第1の信号を出力することを特徴とする請求項1に記載の半導体スイッチング装置。
- 前記第1のスイッチング素子は、互いに並列に接続された複数のスイッチング素子を有し、
前記第1の駆動回路は、前記第1の信号を入力すると前記複数のスイッチング素子の1つのみをONさせることを特徴とする請求項1又は2に記載の半導体スイッチング装置。 - 前記第1及び第2のスイッチング素子は、Si又はSiCからなるトランジスタ、MOSFET又はIGBTであることを特徴とする請求項1~3の何れか1項に記載の半導体スイッチング装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112013007309.9T DE112013007309B4 (de) | 2013-08-07 | 2013-08-07 | Halbleiterschaltvorrichtung |
CN201380078817.4A CN105493407B (zh) | 2013-08-07 | 2013-08-07 | 半导体开关装置 |
PCT/JP2013/071388 WO2015019448A1 (ja) | 2013-08-07 | 2013-08-07 | 半導体スイッチング装置 |
US14/888,955 US9503072B2 (en) | 2013-08-07 | 2013-08-07 | Semiconductor switching device |
JP2015530606A JP6052417B2 (ja) | 2013-08-07 | 2013-08-07 | 半導体スイッチング装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2013/071388 WO2015019448A1 (ja) | 2013-08-07 | 2013-08-07 | 半導体スイッチング装置 |
Publications (1)
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WO2015019448A1 true WO2015019448A1 (ja) | 2015-02-12 |
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PCT/JP2013/071388 WO2015019448A1 (ja) | 2013-08-07 | 2013-08-07 | 半導体スイッチング装置 |
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US (1) | US9503072B2 (ja) |
JP (1) | JP6052417B2 (ja) |
CN (1) | CN105493407B (ja) |
DE (1) | DE112013007309B4 (ja) |
WO (1) | WO2015019448A1 (ja) |
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DE112017005344T5 (de) * | 2016-12-05 | 2019-08-08 | Hitachi Automotive Systems, Ltd. | Steuereinrichtung |
US11165422B2 (en) | 2020-04-01 | 2021-11-02 | Delta Electronics, Inc. | Gate driver circuit with reduced power semiconductor conduction loss |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62211563A (ja) * | 1986-03-13 | 1987-09-17 | Nippon Denso Co Ltd | 電流検出装置 |
JPH10174310A (ja) * | 1996-12-04 | 1998-06-26 | Denso Corp | 誘導性負荷駆動装置 |
JP2004135378A (ja) * | 2002-10-08 | 2004-04-30 | Fujitsu Ten Ltd | 誘導性負荷駆動方法および装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62272821A (ja) | 1986-05-20 | 1987-11-27 | 富士電機株式会社 | トランジスタの過電流保護回路 |
JPH0237828A (ja) | 1988-07-28 | 1990-02-07 | Fuji Electric Co Ltd | Igbtの過電流保護回路 |
JP5044448B2 (ja) * | 2008-03-03 | 2012-10-10 | ルネサスエレクトロニクス株式会社 | 電源スイッチ回路 |
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2013
- 2013-08-07 WO PCT/JP2013/071388 patent/WO2015019448A1/ja active Application Filing
- 2013-08-07 CN CN201380078817.4A patent/CN105493407B/zh active Active
- 2013-08-07 JP JP2015530606A patent/JP6052417B2/ja active Active
- 2013-08-07 DE DE112013007309.9T patent/DE112013007309B4/de active Active
- 2013-08-07 US US14/888,955 patent/US9503072B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62211563A (ja) * | 1986-03-13 | 1987-09-17 | Nippon Denso Co Ltd | 電流検出装置 |
JPH10174310A (ja) * | 1996-12-04 | 1998-06-26 | Denso Corp | 誘導性負荷駆動装置 |
JP2004135378A (ja) * | 2002-10-08 | 2004-04-30 | Fujitsu Ten Ltd | 誘導性負荷駆動方法および装置 |
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Publication number | Publication date |
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US9503072B2 (en) | 2016-11-22 |
US20160072496A1 (en) | 2016-03-10 |
CN105493407A (zh) | 2016-04-13 |
DE112013007309B4 (de) | 2022-05-19 |
DE112013007309T5 (de) | 2016-05-19 |
CN105493407B (zh) | 2018-11-13 |
JPWO2015019448A1 (ja) | 2017-03-02 |
JP6052417B2 (ja) | 2016-12-27 |
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