[특허]Protection device for stopping operation of an inverter

Protection device for stopping operation of an inverter 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02H-007/122
출원번호	US-0080790 (1993-06-24)
우선권정보	JP-0165997 (1992-06-24); JP-0023894 (1993-02-12); JP-0096199 (1993-04-22); JP-0106308 (1993-05-07)
발명자 / 주소	Okado Chihiro (Tokyo JPX)
출원인 / 주소	Kabushiki Kaisha Toshiba (Kawasaki JPX 03)
인용정보	피인용 횟수 : 29 인용 특허 : 0

초록 ▼

A protection device for an inverter which is connected to an AC power system, converts DC power into AC power, supplies the AC power to a load and includes a control circuit for detecting a phase and a frequency of an output voltage, for generating a current reference synchronized with the output voltage and for controlling the inverter such that an output current is coincident with the current reference. The protection device includes a first detection circuit for detecting that an AC output is disconnected from the AC power system based on an electrical quantity of the output voltage and for generating a detection signal based on a detection result, and a correction circuit connected to receive the detection signal for generating a correction signal to break a power balance between an output power and a power consumed by the load. The control circuit corrects the current reference by the correction signal and controls the inverter based on the current reference thus corrected thereby to break the power balance. The protection device also includes a second detection circuit for detecting that the power balance is broken and for generating an abnormality signal to stop operation of the inverter based on a detection result.

대표청구항 ▼

A protection device for an inverter which is connected to an AC power system through a circuit breaker, converts DC power into AC power, supplies said AC power to a load and includes control means for detecting a phase and a frequency of an output voltage of said inverter, for generating a current reference synchronized with said output voltage and for controlling said inverter such that an output current of said inverter is coincident with said current reference, said protection device comprising: first detection means for detecting that an AC output of said inverter is disconnected from said AC power system based on an electrical quantity of said output voltage including said frequency of said output voltage and for generating a detection signal based on a detection result; correction means connected to receive said detection signal for generating a correction signal so as to shift said phase of said output voltage in a direction to diverge said frequency of said output voltage thereby to break a power balance between an output power of said inverter and a power consumed by said load such that said phase is advanced when said frequency is increasing and said phase is lagged when said frequency is decreasing; said control means being connected to receive said correction signal for correcting said current reference by said correction signal and for controlling said inverter based on said current reference thus corrected thereby to break said power balance; and second detection means for detecting that said power balance is broken and for generating an abnormality signal to stop operation of said inverter based on a detection result.

이 특허를 인용한 특허 (29)

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Smith, David; Gong, Maozhong, Power converter for executing anti-islanding procedures upon detecting an islanding condition.
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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

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연합인증

Protection device for stopping operation of an inverter 원문보기

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Protection device for stopping operation of an inverter 원문보기

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이 특허를 인용한 특허 (29)

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