JP2000180491A5 - - Google Patents
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- JP2000180491A5 JP2000180491A5 JP1998354671A JP35467198A JP2000180491A5 JP 2000180491 A5 JP2000180491 A5 JP 2000180491A5 JP 1998354671 A JP1998354671 A JP 1998354671A JP 35467198 A JP35467198 A JP 35467198A JP 2000180491 A5 JP2000180491 A5 JP 2000180491A5
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- JP
- Japan
- Prior art keywords
- diodes
- photocouplers
- detection circuit
- light emitting
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001514 detection method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 1
Description
【０００１】
【発明の属する技術分野】
本発明は、３相交流電力供給系統を対象とした欠相検出回路に関する。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is related to open-phase detection circuit intended for three-phase AC power supply system.
【００２０】
本発明の目的は、電気機器の入力に回り回路が存在しても、欠相が検出できるようにした欠相検出回路を提供することにある。[0020]
An object of the present invention is to provide a phase loss detection circuit that can detect a phase loss even if a circuit is present at the input of an electric device.
【００５３】
【発明の効果】
本発明によれば、インバータ装置など電気機器の入力に、表示用のランプや電磁接触器、ノイズフィルタなど回り回路となってしまう各種の機器が接続されている場合でも、欠相を検出することができる。
また、本発明によれば、多相交流電力で運転される電気機器の異常発生を未然に抑えることができ、電気機器の安全性と信頼性を確保することができる。[0053]
【The invention's effect】
Advantageous Effects of Invention According to the present invention, it is possible to detect an open phase even when various types of devices such as a display lamp, an electromagnetic contactor, and a noise filter are connected to an input of an electrical device such as an inverter device, which become a circling circuit. Can be.
Further, according to the present invention, abnormality of the electrical equipment to be operated with polyphase AC power can be suppressed in advance to, and reliability and safety of electrical equipment can be secure.
Claims (4)
前記各フォトカプラが接続された電源線の電圧が、３本の電源線の中で一番高くなるとオンになるように構成したことを特徴とする欠相検出回路。 Each phase of the power line of the three-phase AC Connect the optocouplers, the open-phase detecting apparatus of a type which detects a phase loss by turning off the respective photocouplers,
The voltage of each photocoupler is connected to power supply lines, open phase detection circuit, characterized by being configured such that the highest and a that the ON of the three power supply lines.
前記各フォトカプラの入力側発光ダイオードのアノードは、該発光ダイオードと同じ導通方向の夫々のダイオードを介して、前記電源線の夫々に個別に接続され、
前記各フォトカプラの入力側発光ダイオードのカソードは１個の抵抗を介して３個のダイオードのアノードに共通に接続され、
これら３個のダイオードのカソードは、前記電源線に個別に接続されていることを特徴とする欠相検出回路。In the invention according to claim 1,
The anode of the input side light emitting diode of each photocoupler is individually connected to each of the power supply lines via each diode in the same conduction direction as the light emitting diode,
The cathodes of the input side light emitting diodes of the respective photocouplers are commonly connected to the anodes of the three diodes via one resistor,
The cathode is open phase detection circuit, characterized in that before Symbol power line are connected to separate these three diodes.
前記各フォトカプラの入力側発光ダイオードのアノードは、共通に１個の抵抗を介して３個のダイオードのカソードに接続され、
これら３個のダイオードのアノードは、前記３本の電源線に個別に接続され、
前記各フォトカプラの入力側発光ダイオードのカソードは、該発光ダイオードと同じ導通方向のダイオードを介して、前記電源線に接続されていることを特徴とする欠相検出回路。In the invention according to claim 1,
The anodes of the input-side light-emitting diodes of the respective photocouplers are commonly connected to the cathodes of three diodes via one resistor,
The anode of these three diodes are individually connected to the three power lines,
The cathode of the input-side light-emitting diodes of the photocouplers through the same conducting direction of the diodes and light emitting diodes, open phase detection circuit, characterized in that connected to the power line.
前記各フォトカプラの全てがオフしたとき、電源遮断と判別する論理回路が設けられていることを特徴とする欠相検出回路。In the invention according to any one of claims 1 to 3,
An open phase detection circuit, comprising: a logic circuit for determining that power is cut off when all of the photocouplers are turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35467198A JP3718597B2 (en) | 1998-12-14 | 1998-12-14 | Phase loss detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35467198A JP3718597B2 (en) | 1998-12-14 | 1998-12-14 | Phase loss detection circuit |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2000180491A JP2000180491A (en) | 2000-06-30 |
| JP2000180491A5 true JP2000180491A5 (en) | 2004-12-24 |
| JP3718597B2 JP3718597B2 (en) | 2005-11-24 |
Family
ID=18439130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35467198A Expired - Lifetime JP3718597B2 (en) | 1998-12-14 | 1998-12-14 | Phase loss detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3718597B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4786142B2 (en) * | 2004-05-17 | 2011-10-05 | 三和機材株式会社 | Construction machinery |
| CN201811997U (en) | 2007-11-13 | 2011-04-27 | 艾默生环境优化技术有限公司 | Three-phase detection equipment |
| JP2011135752A (en) * | 2009-12-25 | 2011-07-07 | Japan Aviation Electronics Industry Ltd | Open-phase detection circuit and method of detecting open phase |
| JP5433528B2 (en) * | 2010-08-20 | 2014-03-05 | 日本航空電子工業株式会社 | Phase loss detection circuit and phase loss detection method |
| JP2021136007A (en) * | 2020-02-21 | 2021-09-13 | パナソニックＩｐマネジメント株式会社 | Apparatus for detecting phase interruption and blockage in a three-phase ac power source and method of detecting same |
| CN117526737B (en) * | 2023-11-20 | 2024-06-07 | 深圳市卓飞电子科技有限公司 | Input rectifying circuit of power supply |
-
1998
- 1998-12-14 JP JP35467198A patent/JP3718597B2/en not_active Expired - Lifetime
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