CN100438270C - Electrical automatic transfer switch having thermal overload protection - Google Patents
Electrical automatic transfer switch having thermal overload protection Download PDFInfo
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- CN100438270C CN100438270C CNB2006100930148A CN200610093014A CN100438270C CN 100438270 C CN100438270 C CN 100438270C CN B2006100930148 A CNB2006100930148 A CN B2006100930148A CN 200610093014 A CN200610093014 A CN 200610093014A CN 100438270 C CN100438270 C CN 100438270C
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- switch
- supply voltage
- switch portion
- automatic transfer
- electronic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/14—Modifications for compensating variations of physical values, e.g. of temperature
Abstract
An electrical automatic transfer switch having a thermal overload protection function is disclosed. The electrical automatic transfer switch includes an electrical switch unit formed of a semiconductor switching device, and an assistant switch unit formed of a non-heating device connected with the same inparallel. A switching operation for a switch between a constant power and an emergency power is performed when the phase of a power voltage is zero using a semiconductor switching device. The continuous supply of power voltage is performed through an assistant switch unit. A heating phenomenon does not occur at a semiconductor switch device by power supplied to the load after a switching operation is performed. A radiating plate is not needed, do that a small size system can be fabricated.
Description
Technical field
The present invention relates to a kind of automatic transfer switch (Automatic Transfer Switch:ATS), in more detail, relate to a kind of athermic electronic type automatic transfer switch, it is overheated that it can prevent that switch from switching the required employed thyristor of electronic switch portion.
Background technology
Automatic transfer switch is the device that more than one load is automatically switched to other power supply by a power supply.As shown in Figure 1, automatic transfer switch 2 makes the electric power that comes from stabilized power source be provided for load 4 under normal condition, in this process, if stabilized power source makes the electric power that comes from stand-by power supply be provided for load because accident or fault and can't normal supply will be switched automatically.Stabilized power source generally uses commercial power, and stand-by power supply uses generating power supply or reserve battery power supply etc. usually.
Above-mentioned automatic transfer switch major part is a mechanical type, and the physical property restriction because of the mechanical switch structure is difficult to further improve switch speed.The problem that mechanical switch exists is, produces mechanicalness noise in course of action, and contact can be worn and torn, and also the phenomenon that contact is melting can take place when serious.
The problem of another existence is that noise that produces during switching and arc discharge may make load sustain damage.Especially because the difference of part throttle characteristics, cause misoperation or serious damage because of noise and arc discharge sometimes.Such as, with regard to automation and unattended system, when serious, may lead to personnel casualty accidents owing to misoperation.The controller of being responsible for numerical control in the automatic assembly line may be produced a large amount of substandard products owing to misoperation.
The generation of these problems and the phase-independent of importing power supply all produce because of change action.The inventor is in the Korean Patent of 10-2005-0002211 at the application number of application on January 10th, 2005, has mentioned the electronic type automatic transfer switch that can overcome these problems.This electronic type automatic transfer switch when the phase place of input power supply is zero degree, carries out the switching of power supply when input power supply handover operation, can prevent the damage of noise and arc discharge and load.
On the other hand, the thyristor that is used for the electronic type automatic transfer switch can generate heat when energising.The thyristor that generally is used for the electronic type automatic transfer switch is TRIAC (triac).On structure, the anode of TRIAC (anode) is engaged by 5 layers of PN with negative electrode (cathode) and forms, therefore, if conducting can produce sizable joint heat owing to the contact resistance at junction surface.Engaging hot 1A produces about 1～2W approximately.In order to cool off the heat that produces in the thyristor, must use heating panel, if heating panel is less or heat exchange is obstructed, then must ventilate by force, even use fan.
But electronic type automatic transfer switch major part is installed on the distribution panelboard, because the characteristic of distribution panelboard requires it to have closed structure, thereby is difficult to constitute ventilating opening or other scavenge port sometimes.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of electronic type automatic transfer switch, it can prevent the thyristor heating of electronic type automatic transfer switch effectively.
The present invention proposes in order to solve the problems of the technologies described above, and it relates to the electronic type automatic transfer switch with anti-overheated function.Electronic type automatic transfer switch with anti-overheated function of the present invention is made of following several sections: the 1st rectification part, and it is accepted the input of stabilized power source (Constant Power) and carries out rectification, exports the 1st supply voltage V1; The 2nd rectification part, it is accepted the input of stand-by power supply (Emergency Power) and carries out rectification, exports the 2nd supply voltage V2; The internal electric source generating unit, it accepts the input of the 1st supply voltage and the 2nd supply voltage, produces action power; Control part, its perception stabilized power source has no abnormal, when stabilized power source just often, make the 1st supply voltage be output to load, and when stabilized power source is unusual, then make the 2nd supply voltage be output to load; Electronic switch portion, it accepts the control of above-mentioned control part, carries out change action, makes the some loads that is provided in the 1st supply voltage and the 2nd supply voltage, when the phase place of the 1st and 2 supply voltages is zero degree, carries out switch motion; Auxiliary switch portion, it is made of heat generation switch element not, accepts the control of above-mentioned control part, finishes change action with above-mentioned electronic switch portion interlock, makes the some loads that is provided in the 1st supply voltage and the 2nd supply voltage.The electric power that is provided for load is provided by electronic switch portion at the beginning, and through after the regular hour, portion is provided by auxiliary switch.
Above-mentioned electronic switch portion preferably is made of following several sections: the 1st switch portion, be connected between the 1st supply voltage and the load, and carry out switch control by phase place, it has 4 the 1st switch modules, when the phase place of the 1st supply voltage is carried out change action during for zero degree; The 1st switch drive portion, it is according to controlling and driving the 1st switch module of control part; The 2nd switch portion, it is connected between the 2nd supply voltage and the load, has 4 the 2nd switch modules, when the phase place of the 2nd supply voltage is carried out change action during for zero degree; The 2nd switch drive portion, it is according to controlling and driving the 2nd switch module of control part.
Above-mentioned auxiliary switch portion preferably is made of following several sections: the 1st auxiliary switch portion, and it has 4 the 1st latching relay modules on 4 the 1st switch modules that are connected in parallel on the 1st switch portion respectively; The 2nd auxiliary switch portion, it has 4 the 2nd latching relay modules on 4 the 2nd switch modules that are connected in parallel on the 2nd switch portion respectively.
Above-mentioned auxiliary switch portion is later than electronic switch portion with the regular hour difference and connects in connecting (turn-on) action; In disconnecting (turn-off) action, disconnect prior to electronic switch portion with the regular hour difference.
Description of drawings
In order to understand employed accompanying drawing in the detailed description of the present invention more fully, provide about each brief description of drawings.
Fig. 1 is the structure chart of the general automatic transfer switch connecting structure for electrical equipment of explanation.
Fig. 2 is the structure chart that the circuit of the electronic type automatic transfer switch with anti-overheated function of explanation useful embodiment of the present invention constitutes.
Fig. 3 describes the electronic switch portion of Fig. 2 and the accompanying drawing of the circuit formation of auxiliary switch portion in detail.
Fig. 4 and Fig. 5 are the flow charts of the change action of explanation electronic switch portion and auxiliary switch portion.
Embodiment
For fully understanding the present invention and benefit of the present invention and the purpose that realizes by embodiments of the invention, must reference in order to accompanying drawing that useful embodiment of the present invention is described and the content in the accompanying drawing.For helping to understand each accompanying drawing, identical member is as much as possible with identical reference symbol mark.Be considered to blur the well-known function of aim of the present invention and be described in detail in this omission about constituting.
Below with reference to description of drawings useful embodiment of the present invention, describe the electronic type automatic transfer switch with anti-overheated function of the present invention thus in detail.
Fig. 2 is the structure chart that the circuit of the electronic type automatic transfer switch with anti-overheated function of explanation useful embodiment of the present invention constitutes.By accompanying drawing as can be known, the electronic type automatic transfer switch 100 of useful embodiment of the present invention is made of following several sections basically: the 1st rectification part 10; The 2nd rectification part 13; Internal electric source generating unit 20; Electronic switch portion 30; Control part 50; Auxiliary switch portion 110.
The input of the 1st rectification part 10 is accepted the 1st connector 12 of stabilized power source input; The input of the 2nd rectification part 13 is accepted the 2nd connector 15 of stand-by power supply input.Be connected the 1st fuse 11 between the input of the 1st rectification part 10 and the 1st connector 12; Be connected the 2nd fuse 14 between the input of the 2nd rectification part 13 and the 2nd connector 15.
The 1st rectification part 10 is accepted the input of stabilized power source and is carried out rectification, and the 1st supply voltage V1 is outputed to internal electric source generating unit 20, electronic switch portion 30 and auxiliary switch portion 110.The 2nd rectification part 13 is accepted the input of stand-by power supply and is carried out rectification, and the 2nd supply voltage V2 is outputed to internal electric source generating unit 20, electronic switch portion 30 and auxiliary switch portion 110.Internal electric source generating unit 20 is accepted the input of the 1st supply voltage V1 or the 2nd supply voltage V2, produces the internal actions power Vcc.
Control part 50 perception stabilized power sources have no abnormal, when stabilized power source just often, make the 1st supply voltage V1 be output to load 4, and when stabilized power source is unusual, then can control the change action of electronic switch portion 30, make the 2nd supply voltage V2 be output to load.Be connected the 1st and the 2nd optical coupler 16,17 between the output of the 1st and the 2nd rectification part 10,13 and the control part 50.Control part 50 is by 16,17 perception the 1st of the 1st and the 2nd optical coupler and the 2nd supply voltage V1, the output state of V2.
Electronic type automatic transfer switch 100 can also comprise overcurrent detecting element 40 and auxiliary contact portion 80.Overcurrent detecting element 40 detects the overcurrent condition to the supply voltage of load 4 inputs from electronic switch portion 30, if overcurrent is detected, then to control part 50 input overcurrent detecting signals.The overcurrent detecting signal that 50 pairs of control parts are transfused to is made response, and the change action of control electronic switch portion 30 makes the supply voltage that is imported into load 4 finish switch motion.Auxiliary contact portion 80 has the 1st and the 2nd auxiliary contact 82,84, can connect other device as required, with the change action interlock of electronic switch portion 30.Electronic type automatic transfer switch 100 also comprises front panel 60, and it is made of input part 62 and state display part 64 and state value display part 66.Input part 62 is connected with control part 50, has a plurality of input switches that electronic type automatic transfer switch 100 is moved.State value display part 64 is controlled by control part 50, shows the state of electronic type automatic transfer switch 100 with numeral or literal.State display part 66 shows the operate condition of electronic type automatic transfer switch 100 in bright lamp mode.Xiang Guan more specific description sees the Korean Patent that is numbered 10-2005-0002211 of application on January 10th, 2005 for details therewith.
Fig. 3 describes the electronic switch portion 30 of Fig. 2 and the accompanying drawing of the circuit formation of auxiliary switch portion 110 in detail.With reference to the accompanying drawings as can be known, electronic switch portion 30 is made of following several sections: the 1st switch portion 31; The 2nd switch portion 35; The 1st switch drive portion 33; The 2nd switch drive portion 37.
The 1st switch portion 31 is driven by the 1st switch drive portion 33, and it carries out change action makes the 1st supply voltage V1 be imported into load 4 or be cut off.The 2nd switch portion 35 is driven by the 2nd switch drive portion 37, and it carries out change action makes the 2nd supply voltage V2 be imported into load 4 or be cut off.
The 1st switch portion 31 serial or parallel connections have 4 the 1st switch module 32a that carry out switch control by phase place, 32b, 32c, 32d between the 1st supply voltage V1 and load 4.The 2nd switch portion 35 serial or parallel connections have 4 the 2nd switch module 36a that carry out switch control by phase place, 36b, 36c, 36d between the 2nd supply voltage V2 and load 4.
The 1st switch module 32a, 32b, 32c, each module of 32d is by thyristor TR30 and optical coupler PC30 and a plurality of resistance (R30, R31, R32) formation.The 2nd switch module 36a, 36b, 36c, each module of 36d is by thyristor TR35 and optical coupler PC35 and a plurality of resistance R 35, R36, R37 constitutes.(TR30 TR35) preferably is made of TRIAC (triac) above-mentioned thyristor, and (PC30 PC35) preferably is made of triac optical coupler (Photo Traic) above-mentioned optical coupler.
Constitute the 1st switch module 32a, 32b, 32c, the thyristor TR30 of 32d is connected between the 1st supply voltage V1 and the load 4, the anode terminal of optical coupler PC30 input is connected on the internal actions power Vcc, cathode terminal is connected in the 1st switch drive portion 33, the reflector of output (Emitter) terminal is connected on the 1st supply voltage V1, bonder terminal is connected on the gate terminal of thyristor TR30, when the phase place of the 1st supply voltage V1 is carried out the on/off action during at zero degree.
Constitute the 2nd switch module 36a, 36b, 36c, the thyristor TR35 of 36d is connected between the 2nd supply voltage V2 and the load 4, the anode terminal of optical coupler PC35 input is connected on the internal actions power Vcc, cathode terminal is connected in the 2nd switch drive portion 37, the emitter terminal of output is connected on the 2nd supply voltage V2, bonder terminal is connected on the gate terminal of thyristor TR35, when the phase place of the 2nd supply voltage V2 is carried out the on/off action during at zero degree.
The 1st switch drive portion 33 has transistor Q30 and the resistance (R33,34) that on/off is provided by the 1st switch controlling signal that is provided by control part 50, and the 1st switch controlling signal is made response, drives the 1st switch module 32a, 32b, 32c, 32d.The 2nd switch drive portion 37 has transistor Q35 and the resistance R 38 that realizes on/off by the 2nd switch controlling signal, and R39 makes response to the 2nd switch controlling signal, drives the 2nd switch module 36a, 36b, 36c, 36d.
Simultaneously, auxiliary switch portion 110 is made of the 1st 110a of auxiliary switch portion and the 2nd 110b of auxiliary switch portion.Auxiliary switch portion 110 uses not heat generation switch element, such as latching relay.
The 1st 110a of auxiliary switch portion has and is connected in parallel on the 1st switch module 32a, 32b, 32c, 4 the 1st latching relay module RL10 on the 32d, RL20.RL30, RL40.The 2nd 110b of auxiliary switch portion has and is connected in parallel on the 2nd switch module 36a, 36b, 36c, 4 the 2nd latching relay module RL12 on the 36d, RL22, RL32, RL42.
The the 1st and the 2nd latching relay module RL10, RL20.RL30, RL40 and RL12, RL22, RL32, RL42 have latching relay and the driving appliance circuit that is used to drive latching relay.A plurality of latching relays are connected in parallel on respectively on the corresponding thyristor, to making response by the 1st and the 2nd relay control signal of control part 50 inputs, are switched on or switched off action.
Be used for providing to load 4 action of electronic switch portion 30 with the auxiliary switch portion 110 of electric power, the control according to control part 50 is constructed as follows.This change action is by the 1st switch module 32a, 32b, 32c, 32d and the 2nd latching relay module (RL10, RL20.RL30 is RL40) with the 2nd switch module 36a, 36b, 36c, 36d and the 2nd latching relay module RL12, RL22, RL32, RL42 finishes in an identical manner.
Fig. 4 and Fig. 5 are the flow charts of the change action of explanation electronic switch portion 30 and auxiliary switch portion 110.With reference to figure 4 as can be known, be used for providing the change action of electric power to be constructed as follows to load 4.At first, in the S100 stage, according to the control of control part 50, electronic switch portion 30 corresponding thyristors are switched on, and provide electric power to load 4.Interlock therewith, in the S110 stage, the latching relay that is connected in parallel on the corresponding thyristor is switched on.Therefore, electric power is provided for load 4 by latching relay.Because electric power is provided by latching relay, thyristor generates heat hardly.
If electric power is provided for load 4 by latching relay,, thyristor is disconnected so in the S120 stage.
Thyristor and latching relay are switched on the regular hour difference.For this reason, control part 50 is used to control the control signal of thyristor and latching relay with regular hour difference output, but also can export simultaneously.This is because the response speed of latching relay is later than thyristor, so latching relay is switched on after thyristor is connected, and the time difference at this moment is about 40～50msec.
With reference to figure 5 as can be known, be provided for load 4 electric power, and it is as follows to disconnect the process of the latching relay that electric power once was provided in order to change.
At first, in the S200 stage, corresponding thyristor is connected.Next,, provide back voltage, make it to disconnect to the latching relay that keeps on-state in the S210 stage.Behind about 40～50ms, the thyristor of once connecting is disconnected in the S220 stage.
As mentioned above, why the on/off of thyristor and latching relay in parallel is with it wanted mutually at regular intervals, when being zero degree for the phase place when the supply voltage that is provided for 4 the electric power of loading exactly, finishes switch motion.
And, when switching, at first connect the N phase, last energized, when disconnecting, at first deenergization, and then disconnection N phase.
As mentioned above, electronic type automatic transfer switch 100 of the present invention carries out switch motion by the power supply by the stabilized power source input, makes the 1st supply voltage V1 be provided for load 4.If for some reason, stabilized power source is not transfused to or overcurrent has taken place, and then carries out switch motion by the power supply by the stand-by power supply input, makes the 2nd supply voltage V2 be provided for load 4.At this moment, electronic switch portion 30 carries out switch connection/disconnection action in the phase place of the supply voltage that is provided during for zero degree, and the problem of noise or arc discharge one class can not take place.And when energising, the electric power that is provided for load 4 provides by corresponding latching relay, thereby thyristor can generate heat hardly.
The effect of invention
In sum, electronic type automatic transfer switch of the present invention switches between power supply in the electronics mode, has realized that power supply at a high speed switches.Carry out switch when the phase place of supply voltage during for zero degree, the problem of noise or arc discharge one class can not take place.In addition, after change action was finished, the electric power that is provided for load was provided by corresponding latching relay, thereby thyristor can be generated heat hardly.Therefore need not to use heating panel, do not use heating panel can make smaller and more exquisite switch.
As mentioned above, though the present invention is to serve as with reference to being illustrated with the embodiment that indicates in the accompanying drawing, but this only is an illustration, is familiar with the people of the relevant general knowledge of the technical field of the invention, and various variations and other impartial embodiment thus can fully aware ofly can extend out.Therefore, technical protection scope proposed by the invention must be stipulated by additional claims.
Claims (4)
1. the electronic type automatic transfer switch with anti-overheated function is characterized in that, comprises following several sections: the 1st rectification part, and it is accepted the input of stabilized power source and carries out rectification, exports the 1st supply voltage V1; The 2nd rectification part, it is accepted the input of stand-by power supply and carries out rectification, exports the 2nd supply voltage V2; The internal electric source generating unit, it accepts the input of the 1st supply voltage and the 2nd supply voltage, produces action power; Control part, its perception stabilized power source has no abnormal, when stabilized power source just often, make the 1st supply voltage be output to load, and when stabilized power source is unusual, then make the 2nd supply voltage be output to load; Electronic switch portion, it accepts the control of above-mentioned control part, carries out change action, makes the some loads that is provided in the 1st supply voltage and the 2nd supply voltage, when the phase place of the 1st and the 2nd supply voltage is zero degree, carries out switch motion; Auxiliary switch portion, it is made of heat generation switch element not, accept the control of above-mentioned control part, finish change action with above-mentioned electronic switch portion interlock, make the some loads that is provided in the 1st supply voltage and the 2nd supply voltage, the electric power that is provided for load is provided by electronic switch portion at the beginning, and after time period 40～50ms, portion is provided by auxiliary switch.
2. the electronic type automatic transfer switch with anti-overheated function according to claim 1, it is characterized in that, above-mentioned electronic switch portion is made of following several sections: the 1st switch portion, be connected between the 1st supply voltage and the load, carry out switch control by the 1st supply voltage phase place, it has 4 the 1st switch modules, when the phase place of the 1st supply voltage is carried out change action during for zero degree; The 1st switch drive portion, it is according to controlling and driving the 1st switch module of control part; The 2nd switch portion, it is connected between the 2nd supply voltage and the load, has 4 the 2nd switch modules, when the phase place of the 2nd supply voltage is carried out change action during for zero degree; The 2nd switch drive portion, it is according to controlling and driving the 2nd switch module of control part.
3. the electronic type automatic transfer switch with anti-overheated function according to claim 2, it is characterized in that, above-mentioned auxiliary switch portion is made of following several sections: the 1st auxiliary switch portion, and it has 4 the 1st latching relay modules on 4 the 1st switch modules that are connected in parallel on the 1st switch portion respectively; The 2nd auxiliary switch portion, it has 4 the 2nd latching relay modules on 4 the 2nd switch modules that are connected in parallel on the 2nd switch portion respectively.
4. the electronic type automatic transfer switch with anti-overheated function according to claim 1 is characterized in that: above-mentioned auxiliary switch portion is later than electronic switch portion with the regular hour difference and connects in ON Action; In disconnecting action, disconnect prior to electronic switch portion with the regular hour difference, wherein said regular hour difference is 40～50ms.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050087587A KR100559955B1 (en) | 2005-09-21 | 2005-09-21 | Electrical automatic transfer switch having thermal overload protection |
| KR1020050087587 | 2005-09-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1937352A CN1937352A (en) | 2007-03-28 |
| CN100438270C true CN100438270C (en) | 2008-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100930148A Active CN100438270C (en) | 2005-09-21 | 2006-06-02 | Electrical automatic transfer switch having thermal overload protection |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100559955B1 (en) |
| CN (1) | CN100438270C (en) |
| WO (1) | WO2007035017A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452613C (en) * | 2006-11-29 | 2009-01-14 | 天津百利特精电气股份有限公司 | PC-automatic switch with regional interlock |
| US8743512B2 (en) * | 2011-10-26 | 2014-06-03 | Lear Corporation | Limit switch interface circuit |
| JP6468114B2 (en) * | 2015-08-04 | 2019-02-13 | 住友電気工業株式会社 | Power supply device and switch control method thereof |
| CN111121452B (en) * | 2020-01-09 | 2020-09-18 | 永康市利高工具厂 | Heater based on mutual switching of conductor and semiconductor |
| US20230170162A1 (en) * | 2021-12-01 | 2023-06-01 | Vertiv Corporation | Heatsink connected with a common output and multiple sources |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2311847Y (en) * | 1997-10-10 | 1999-03-24 | 王宪权 | Non-flashy flow and non-arc control switch |
| US20040233602A1 (en) * | 2003-02-28 | 2004-11-25 | Eaton Zane C. | Automatic transfer switch capable of receiving input power having voltage within a wide range |
| US20050057878A1 (en) * | 2003-09-12 | 2005-03-17 | General Electric Company | Automatic transfer switch and protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4405867A (en) * | 1980-01-23 | 1983-09-20 | Automatic Switch Company | System for transferring a load between two power sources without interruption of power to the load |
| US5739594A (en) * | 1996-02-07 | 1998-04-14 | Zenith Controls, Inc. | Controller for automatic transfer switches |
| US5784240A (en) * | 1996-12-20 | 1998-07-21 | Automatic Switch Company | Method and apparatus for limiting current surge upon transfer of a load between A.C. power sources |
| KR20000004240U (en) * | 1998-08-03 | 2000-03-06 | 이상호 | Light Sensing Switch |
| US6825578B2 (en) * | 2001-01-24 | 2004-11-30 | Joseph Perttu | State machine controlled automatic transfer switch system |
| US6542023B1 (en) | 2001-10-10 | 2003-04-01 | International Business Machines Corporation | AC transfer switch using semiconductor devices |
| US6731484B2 (en) * | 2001-12-26 | 2004-05-04 | Northern Technologies, Inc. | Integrated high voltage transient surge suppression with automatic transfer switch for alternate source of electricity |
| US6849967B2 (en) | 2002-04-19 | 2005-02-01 | Eaton Corporation | Automatic transfer switch for microturbine and method of operation |
| US6980911B2 (en) * | 2003-02-28 | 2005-12-27 | Kohler Co. | Automatic transfer switch system with synchronization control |
| KR20040099202A (en) * | 2004-10-22 | 2004-11-26 | (주)에이엔피테크놀러지 | Electronic Switches and Uninterruptible Electronic Automatic Transfer Switches with Power Switching Semiconductor |
-
2005
- 2005-09-21 KR KR1020050087587A patent/KR100559955B1/en active IP Right Grant
- 2005-11-14 WO PCT/KR2005/003853 patent/WO2007035017A1/en active Application Filing
-
2006
- 2006-06-02 CN CNB2006100930148A patent/CN100438270C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2311847Y (en) * | 1997-10-10 | 1999-03-24 | 王宪权 | Non-flashy flow and non-arc control switch |
| US20040233602A1 (en) * | 2003-02-28 | 2004-11-25 | Eaton Zane C. | Automatic transfer switch capable of receiving input power having voltage within a wide range |
| US20050057878A1 (en) * | 2003-09-12 | 2005-03-17 | General Electric Company | Automatic transfer switch and protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2007035017A1 (en) | 2007-03-29 |
| CN1937352A (en) | 2007-03-28 |
| KR100559955B1 (en) | 2006-03-13 |
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Owner name: WUXI HANKWANG ELECTRIC ENGIEERING CO., LTD. Free format text: FORMER OWNER: HANKWANG ELECTRIC CO., LTD. Effective date: 20140904 |
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Effective date of registration: 20140904 Address after: 214000, Jiangsu, Wuxi province Huishan Luo Zhen Town Industrial Park (West Side) Patentee after: Wuxi Hankwang Electric Engieering Co., Ltd. Address before: Seoul, South Korea Patentee before: Hankwang Electric Co., Ltd. |