[특허]Circuit arrangement and method for current measurement

Circuit arrangement and method for current measurement 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01R-001/20 G01R-015/14 G01R-019/00 H03K-017/082 H03K-017/56
출원번호	US-0117511 (2014-12-19)
등록번호	US-10018655 (2018-07-10)
우선권정보	DE-10 2014 202 611 (2014-02-13)
국제출원번호	PCT/EP2014/078663 (2014-12-19)
국제공개번호	WO2015/120935 (2015-08-20)
발명자 / 주소	Sievert, Holger Butzmann, Stefan
출원인 / 주소	Robert Bosch GmbH
대리인 / 주소	Michael Best & Friedrich LLP
인용정보	피인용 횟수 : 0 인용 특허 : 26

초록 ▼

The invention relates to a circuit arrangement having a switching device (1) which is designed to provide a first voltage (UE) and a first electrical current (IE) in a power path and to provide a second voltage (US) and a second electrical current (IS) in a measuring path for the duration of a switching period, wherein the first electrical current corresponds to the second electrical current; having a current measuring apparatus (2) which is arranged in the measuring path and is designed to provide an output signal (UM) which corresponds to the first electrical current; and having a control circuit (3, 4) which is designed to activate the current measuring apparatus for the duration of a measuring period and to deactivate the current measuring apparatus again after the measuring period expires.

대표청구항 ▼

1. A circuit arrangement comprising: a switching device (1) configured, for the duration of a switching period (TB), to provide a first voltage (UE) and a first electric current (IE) in a power path and also to provide a second voltage (US) and a second electric current (IS) in a measurement path, wherein the second electric current (IS) corresponds to the first electric current (IE);a current measuring apparatus (2) arranged in the measurement path and configured to provide an output signal corresponding to the second electric current (IS); anda control circuit (4) configured to turn on the current measuring apparatus (2) for the duration of a measurement period (TM) and to turn off the current measuring apparatus (2) again after the measurement period (TM) has elapsed. 2. The circuit arrangement as claimed in claim 1, wherein the switching device (1) comprises a BJT, a MOSFET, a JFET and/or an IGBT. 3. The circuit arrangement as claimed in claim 2, wherein the switching device (1) is embodied as an IGBT having a sense terminal. 4. The circuit arrangement as claimed in claim 1, wherein the duration of the measurement period (TM) of the current measuring apparatus (2) is less than the duration of the switching period (TB) of the switching device (1). 5. The circuit arrangement as claimed in claim 1, wherein the control circuit (4) activates the current measuring apparatus (2) at the beginning of the switching period (TB) of the switching device (1). 6. The circuit arrangement as claimed in claim 1, wherein the control circuit (4) comprises a monostable multivibrator (5). 7. The circuit arrangement as claimed in claim 6, wherein the control circuit (4) comprises a transistor (6) configured to activate and to deactivate the current measuring apparatus (2) and including a control terminal drivable by the monostable multivibrator (5). 8. The circuit arrangement as claimed in claim 1, wherein the current measuring apparatus (2) is configured to provide a voltage signal (UM) that is proportional to the first electric current (IE). 9. The circuit arrangement as claimed in claim 1, furthermore comprising: a compensation circuit (3) configured to regulate the ratio of the first voltage (UE) and the second voltage (US) of the switching device during the switching period (TB). 10. The circuit arrangement as claimed in claim 9, wherein the compensation circuit (3) includes an operational amplifier (OP) configured to regulate the first voltage (UE) and the second voltage (US) of the switching device (1) by negative feedback. 11. A method for current measurement of an electric current in a measurement path of a circuit arrangement as claimed in claim 1, comprising the following steps: activating (110) the switching device (1) for the duration of a switching period (TB);turning on (120) the current measuring apparatus (2) for the duration of a measurement period (TM) by the control circuit (4);turning off the current measuring apparatus (2) following the measurement period (TM) by the control circuit (4); andoutputting (130) an output signal by the current measuring apparatus (2),said output signal corresponding to the second electric current (IS) in the measurement path.

이 특허에 인용된 특허 (26)

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Mizobe, Shunichi; Maebara, Tsuneo; Watanabe, Kazunori, Electronic control apparatus having switching element and drive circuit.
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Fukuda, Yutaka; Okuda, Ryoichi; Makino, Tomoatsu; Yagi, Kenji; Tsuzuki, Yukio, Semiconductor switching element driving circuit.
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John Vinod ; Suh Bum-Seok,KRX ; Lipo Thomas Anthony, Short circuit protection of IGBTs and other power switching devices.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Circuit arrangement and method for current measurement 원문보기

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Circuit arrangement and method for current measurement 원문보기

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