EP0806781B1 - Circuit pour l'alimentation protégée d'une charge électrique - Google Patents
Circuit pour l'alimentation protégée d'une charge électrique Download PDFInfo
- Publication number
- EP0806781B1 EP0806781B1 EP97400951A EP97400951A EP0806781B1 EP 0806781 B1 EP0806781 B1 EP 0806781B1 EP 97400951 A EP97400951 A EP 97400951A EP 97400951 A EP97400951 A EP 97400951A EP 0806781 B1 EP0806781 B1 EP 0806781B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- electronic switch
- load
- power supply
- switch
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
- H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/548—Electromechanical and static switch connected in series
Definitions
- the present invention relates to a circuit for protected power supply of an electric charge in alternating current, this circuit comprising a switch electromechanical protection and a bidirectional electronic switch placed in series, downstream of the protection switch, and controlled by a control device to ensure gradual operation of the load; parallel to the switch electronic is mounted a shunt switch which ensures operation continuous charge.
- the role of the protection switch is to protect the main path of current if a fault current is detected; its response time is however too long to effectively protect the electronic switch or the shunt switch during operation.
- the present invention therefore aims to use a bypass contactor of standard dimensions whose protection is still ensured during the detection of a fault current.
- the supply circuit is characterized in that connected in series to the shunt switch and upstream of it a component electric designed to establish a DC voltage across the switch electronic.
- the electrical component preferably consists of a resistor or a transformer whose impedance is chosen so as to make it conductive, when an overload current appears in the circuit and during a phase of continuous operation of the load, the electronic switch to which is sent periodically control pulses.
- FIG. 1 shows a supply circuit 10 for an electric charge such than a single- or multi-phase motor M.
- the supply circuit 10 is connected to the conductors of a three-phase distribution network U, V, W.
- an electromechanical protection switch 20 and a electronic switch 30 are placed on one or more phases and in series an electromechanical protection switch 20 and a electronic switch 30; the electronic switch 30 is controlled by a device pulse modulated control unit 40 for modulating the energy supplied to the motor.
- a device pulse modulated control unit 40 for modulating the energy supplied to the motor.
- Motor M is supplied only when the switch electromechanical protection 20, such as a circuit breaker comprising contacts movable cooperating with fixed contacts, is closed, then the device control 40 has closed the electronic switch 30, the current passing through a main current path C.
- the switch electromechanical protection 20 such as a circuit breaker comprising contacts movable cooperating with fixed contacts
- the electronic switch 30 is controlled by the control device pulse modulation 40 to thereby form an electronic dimmer to supply the motor with graduated energy during the start-up and slowing down so as to ensure progressiveness.
- the electronic switch 30 is constituted by two thyristors mounted at the head spade in parallel or by any other bi-directional semiconductor switch controllable; it is connected by an upstream terminal 31 to the switch electromechanical protection 20 and by a downstream boom 32 to the motor M.
- an electromechanical contactor of shunt 50 comprising main contacts 51, 52; the contactor understands also an electromagnet whose coil 53 has terminals connected to the command 40 and which determines the opening and closing of the contacts 51, 52. These contacts are closed outside of a motor start-up or braking phase when it is desired to supply the motor with unmodulated energy.
- the current bypass through path C1 of contactor 50 prevents overheating thyristors.
- a electrical component 60 capable of establishing a direct voltage V across the terminals of thyristors when the contacts 51, 52 of the contactor are closed.
- the component electric 60 has an upstream terminal 61 connected to the upstream terminal 31 of the electronic switch 30 and a downstream terminal 62 connected to the upstream terminal 51 of the contactor 50, the downstream terminal 52 of which is connected to the static switch 30.
- the electrical component 60 may consist of a resistor R ( Figure 1) or by a transformer T ( Figure 2).
- the use of transformer T can allow to supply a branch circuit 11 of circuit 10.
- the impedance of resistance R or the impedance of the primary of transformer T is chosen so as to establish a sufficient voltage V so that thyristors, on which the device 40 continuously sends pulses of control, be conductors at the passage of an overcurrent on the way to main current C.
- FIG 3 shows the circuit of Figure 1 to which a device is added electric arc jump 70 of known type associated with switch 20.
- the device 70 is for example an arc transfer electrode, located on the one hand at a short distance from the fixed upstream contact of the switch 20 connected to the network, and on the other hand connected to the downstream terminal 32 of the electronic switch 30.
- the device 70 has the function of protect the electronic switch 30, during a phase of its operation, by drifting the current when an overcurrent appears on the main path C of current in order to prevent the switch 30 from being crossed by the arc current generated when the switch 20 contacts open.
- the protective switch 20 is closed and then the control device 40 applies ignition signals to the thyristor control electrode or to make the thyristors conductive or non-conductive during the engine starting phase while the contactor 50 remains open.
- control 40 shunts the thyristors by closing the contactor 50 which provides a continuous energy to the motor, the current flowing in the thyristors is then zero.
- the device 40 When the contactor 50 is closed, the device 40 continuously sends control pulses to the thyristors which are however not conductive due to the voltage V at their bomes remaining below the threshold voltage boot.
- Figure 4 illustrates the current patterns in the circuit and the voltage at the thyristor terminals when an overload current, due for example to a short circuit, appears on the current path C.
- the current I c of the main path C increases, causing an increase in the current I Ct passing through the current path C1 when the shunt contactor 50 is closed.
- the increase in current I C1 causes an increase in the voltage V across the terminals of the electronic switch 30 to reach the ignition voltage, which causes the conduction of the thyristors and therefore the passage through them of a current I T , representing part of the current I C.
- the current I C1 increases but remains lower than the repulsion current I R of the contactor corresponding to the welding of the contacts.
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Control Of Ac Motors In General (AREA)
Description
- la figure 1 est un schéma simplifié d'un circuit d'alimentation d'une charge électrique selon l'invention;
- la figure 2 est une variante du mode de réalisation illustré à la figure 1;
- la figure 3 représente le circuit d'alimentation de la figure 1 auquel est associé un dispositif à saut d'arc;
- la figure 4 représente des courbes de grandeurs électriques du circuit lors de l'apparition d'une surcharge.
Claims (4)
- Circuit pour l'alimentation protégée d'une charge électrique en courant alternatif, le circuit (10) comprenant un interrupteur de protection (20) et un interrupteur électronique bidirectionnel (30) placé en série, en aval de l'interrupteur de protection (20) et piloté par un dispositif de commande (40) pour assurer un fonctionnement gradué de la charge, et comprenant en parallèle à l'interrupteur électronique (30) un contacteur de shuntage (50) assurant un fonctionnement continu de la charge, caractérisé en ce qu'est branché en série au contacteur de shuntage (50) et en amont de celui-ci un composant électrique (60) destiné à établir une tension continue (V) aux bornes de l'interrupteur électronique (30) et dont l'impédance est choisie de manière à rendre conducteur, lors de l'apparition d'un courant de surcharge dans le circuit et pendant une phase de fonctionnement continu de la charge, l'interrupteur électronique (30) sur lequel est envoyé périodiquement des impulsions de commande.
- Circuit d'alimentation selon la revendication 1, caractérisé en ce que le composant électrique (60) est une résistance.
- Circuit d'alimentation selon la revendication 1, caractérisé en ce que le composant électrique (60) est un transformateur qui alimente un circuit dérivé (11) du circuit d'alimentation (10).
- Circuit d'alimentation selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend un dispositif à saut d'arc (70) shuntant l'interrupteur électronique (30) en cas d'apparition d'un courant de surcharge pendant un fonctionnement gradué de la charge.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9605956 | 1996-05-10 | ||
FR9605956A FR2748612B1 (fr) | 1996-05-10 | 1996-05-10 | Circuit pour l'alimentation protegee d'une charge electrique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0806781A1 EP0806781A1 (fr) | 1997-11-12 |
EP0806781B1 true EP0806781B1 (fr) | 2002-09-11 |
Family
ID=9492097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97400951A Expired - Lifetime EP0806781B1 (fr) | 1996-05-10 | 1997-04-28 | Circuit pour l'alimentation protégée d'une charge électrique |
Country Status (9)
Country | Link |
---|---|
US (1) | US5953189A (fr) |
EP (1) | EP0806781B1 (fr) |
AU (1) | AU716799B2 (fr) |
BR (1) | BR9703106A (fr) |
CZ (1) | CZ293753B6 (fr) |
DE (1) | DE69715296T2 (fr) |
FR (1) | FR2748612B1 (fr) |
TW (1) | TW463440B (fr) |
ZA (1) | ZA973974B (fr) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1016791C2 (nl) * | 2000-12-04 | 2002-06-05 | Holec Holland Nv | Hybride elektrische schakelinrichting. |
EP1733470B1 (fr) | 2004-04-05 | 2012-08-15 | Siemens Aktiengesellschaft | Dispositif de commutation servant a faire fonctionner un moteur, et procede correspondant |
US8072723B2 (en) * | 2007-06-19 | 2011-12-06 | General Electric Company | Resettable MEMS micro-switch array based on current limiting apparatus |
KR100954674B1 (ko) * | 2008-02-05 | 2010-04-27 | 엘에스산전 주식회사 | 피크 전류 제한 장치 |
FR2930091B1 (fr) * | 2008-04-09 | 2011-10-28 | Schneider Electric Ind Sas | Systeme a relais statique comprenant deux transistors de type jfet en serie |
US8922957B2 (en) * | 2008-04-30 | 2014-12-30 | Keysight Technologies, Inc. | Dynamic switch contact protection |
CN102804314B (zh) * | 2009-06-25 | 2016-04-06 | 东芝三菱电机产业系统株式会社 | 低频断路器 |
US8619395B2 (en) | 2010-03-12 | 2013-12-31 | Arc Suppression Technologies, Llc | Two terminal arc suppressor |
KR101044492B1 (ko) * | 2010-04-23 | 2011-06-27 | 엘에스산전 주식회사 | 하이브리드 한류기 |
JP5106606B2 (ja) | 2010-09-27 | 2012-12-26 | 三菱電機株式会社 | 放電システムおよび電動車両 |
CN102244510A (zh) * | 2011-05-18 | 2011-11-16 | 广州市金矢电子有限公司 | 触发节能装置及晶闸管开关 |
EP2590314A1 (fr) * | 2011-11-03 | 2013-05-08 | ABB Technology AG | Onduleur et système électronique de puissance doté de tels systèmes onduleurs |
DE102012214814A1 (de) * | 2012-08-21 | 2014-02-27 | Siemens Aktiengesellschaft | Motorstarter |
CN104813430B (zh) * | 2012-11-19 | 2017-03-29 | 西门子公司 | 用于控制连接在下游的电机的能量供给的开关设备 |
US9270119B2 (en) * | 2013-05-24 | 2016-02-23 | Eaton Corporation | High voltage direct current transmission and distribution system |
CN104660107A (zh) * | 2013-11-21 | 2015-05-27 | 河南省济源市矿用电器有限责任公司 | 矿用隔爆兼本安质安全型双接触器低压交流软启动器 |
CN104730441B (zh) * | 2013-12-20 | 2018-07-17 | 中国科学院宁波材料技术与工程研究所 | 晶闸管故障检测装置 |
CN104752080A (zh) * | 2013-12-31 | 2015-07-01 | 北京新宇航世纪科技有限公司 | 具有消弧功能的感性负载直流开关 |
DE102016203755A1 (de) * | 2016-03-08 | 2017-09-14 | Siemens Aktiengesellschaft | Motorstarter und Diagnoseverfahren |
EP3410601A1 (fr) * | 2017-06-02 | 2018-12-05 | General Electric Technology GmbH | Appareil de commutation |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3868549A (en) * | 1973-04-26 | 1975-02-25 | Franklin Electric Co Inc | Circuit for protecting contacts against damage from arcing |
FR2584529B1 (fr) * | 1985-07-04 | 1995-01-06 | Merlin Gerin | Disjoncteur-contacteur electrique, notamment pour des batteries de condensateurs |
FR2707437B1 (fr) * | 1993-07-05 | 1995-08-11 | Telemecanique | Dispositif de protection et de commande pour charge électrique. |
-
1996
- 1996-05-10 FR FR9605956A patent/FR2748612B1/fr not_active Expired - Lifetime
-
1997
- 1997-04-28 DE DE69715296T patent/DE69715296T2/de not_active Expired - Lifetime
- 1997-04-28 EP EP97400951A patent/EP0806781B1/fr not_active Expired - Lifetime
- 1997-05-08 ZA ZA9703974A patent/ZA973974B/xx unknown
- 1997-05-08 AU AU20098/97A patent/AU716799B2/en not_active Ceased
- 1997-05-09 CZ CZ19971423A patent/CZ293753B6/cs not_active IP Right Cessation
- 1997-05-09 BR BR9703106A patent/BR9703106A/pt not_active Application Discontinuation
- 1997-05-09 US US08/854,164 patent/US5953189A/en not_active Expired - Lifetime
- 1997-05-30 TW TW086107571A patent/TW463440B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
AU716799B2 (en) | 2000-03-09 |
TW463440B (en) | 2001-11-11 |
FR2748612B1 (fr) | 1998-06-19 |
CZ142397A3 (cs) | 1998-12-16 |
US5953189A (en) | 1999-09-14 |
DE69715296T2 (de) | 2003-06-12 |
EP0806781A1 (fr) | 1997-11-12 |
DE69715296D1 (de) | 2002-10-17 |
BR9703106A (pt) | 1998-06-30 |
CZ293753B6 (cs) | 2004-07-14 |
AU2009897A (en) | 1997-11-13 |
ZA973974B (en) | 1997-12-02 |
FR2748612A1 (fr) | 1997-11-14 |
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