CN1476671A - Two-wire controlled switching - Google Patents
Two-wire controlled switching Download PDFInfo
- Publication number
- CN1476671A CN1476671A CNA018193315A CN01819331A CN1476671A CN 1476671 A CN1476671 A CN 1476671A CN A018193315 A CNA018193315 A CN A018193315A CN 01819331 A CN01819331 A CN 01819331A CN 1476671 A CN1476671 A CN 1476671A
- Authority
- CN
- China
- Prior art keywords
- circuit
- switching
- energy storage
- switch device
- storage device
- 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.)
- Granted
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
- H05B39/04—Controlling
- H05B39/041—Controlling the light-intensity of the source
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
A switching circuit, which facilitates electrically controlled actuation of a switching device, such as a relay, in a two-wire circuit where access may be gained only to an active conductor. The switching circuit (10) comprises an electrically actuatable switching device (19) that is arranged to be connected in series with a load in the form of a lamp (11) in a single-phase ac circuit (18). A solid-state second switching device (20) is connected in series with the first switching device (19). A first energy storage device (21) is connected across the first and second switching devices and arranged under controlled conditions to deliver actuating power to an actuating element (22) of the first switching device (19). Also, a second energy storage device (23) is connected across the second switching device (20) and is arranged to provide power for gating the second switching device. Gating circuitry (24) associated with the second energy storage device (23) is provided to effect periodic ON-OFF gating of the second switching device (20) during the time that the first switching device (19) is actuated to a conducting state. Circuit connections (25 and 26) are made to the first and second energy storage devices (21 and 23) from the junction (27) of the first and second switching devices (19 and 20), the circuit connections providing for charge replenishment of the first energy storage device (21) and charging of the second energy storage device (23) during the OFF gating periods of the second switching device (20).
Description
Technical field
The present invention relates to a kind of circuit, it helps: the automatically controlled action of the switching device in can only inserting energized conductor or the lead two-wire circuit of (being called energized conductor herein).The present invention has been applied to the lighting circuit of remote-controllable, for example, and the lighting circuit that switches in response to the output that obtains from timer or motion detector, and, will the present invention be described from this angle hereinafter.Yet, will be understood that the present invention has wider application.
Background technology
Lighting circuit in the building is typically by twin-core (charged with neutrality) line powered, and this twin conductor is placed on the ceiling in building.And, twin conductor be often used on the ceiling energized conductor be loaded on ceiling on the charged side of lighting fitting between circuit in be connected switch on wall.That is to say that in typical building situation, below the ceiling level, neutral conductor can not normally be obtained usually, and therefore, can not obtain the power supply supply from the circuit below the ceiling level.So, be not easy to provide the electric-controlled switch of illumination, for example, use relay, need power supply to encourage its coil.
The control switch that various so-called two-wire switching circuits are used to throw light on, it only uses an energized conductor.In a this circuit, for example, in on February 28th, 1989 disclosed Australian Patent No.608416, a TRIAC is used as control switch, but this method can be created in the heat dissipation problem in the space of qualification, especially when sizable electric current of 10 order of amps.In the practical methods that addresses this problem, an electric capacity is used in the circuit with a bistable rel-ay, and when this relay disconnected, this electric capacity was charged to its maximum level.Then, when relay is passive when accomplishing closed condition, capacitance charge is used to field application relay coil " connection ", but, this relay only just is maintained at closed condition in such moment, and the described moment is: think that capacitance discharges to is lower than the level of field application relay " disconnection " coil.
Another kind method relates to the use of step-up transformer and the diode that oppositely is connected, and is used for lock current is provided to relay coil, and still, this is not suitable for using in the restricted clearance situation.
Yet another kind of method relates to a kind of circuit that is proposed by the present patent application people on March 26th, 1999 disclosed Australian patent application No.22429/99.Yet the sort of circuit need use dissipate 2 to 3 watts the fin of average power of a kind of Schottky diode and being used to of costliness.
Summary of the invention
The invention provides a kind of alternative method that addresses the above problem, it is convenient to the perseveration as the control switch device of relay etc., and it is provided for the action of automatically controlled switching device on the load current of a wide region in better mode.
In general, the invention provides a kind of switching circuit, comprising:
First switching device that can be electronic, its be arranged to single phase alternating current circuit in load be connected in series;
Solid-state second switch device, itself and first switching device are connected in series;
First energy storage device, it strides the connection of first and second switching devices, and is arranged under the controlled condition, so that action power is sent to first switching device;
Second energy storage device, it strides the connection of second switch device, and is arranged to be used for storing the power supply that is used for gate second switch device;
Gating circuit interrelates with second energy storage device, and be arranged to first switching device passive as conducting state during, act on regular " disconnection "-" connection " gate of second switch device; And
Circuit connects, the tie point of first and second switching devices, and first and second energy storage devices between, this circuit connects and be used for providing the charging of first energy storage device and the charging of second energy storage device during " disconnection " gate of second switch device.
In the operation of switching circuit, first energy storage device is used as action and locks the power supply of first switching device.First energy storage device is charged to its full capacity and surpasses an initial time at interval, and this time interval is after the circuit to supply voltage connects but before first switching device moves conducting state.When first switching device move conducting state, from the charge loss of first energy storage device by regular " disconnection "-" connection " gate of second switch device replenished thereafter.This process will being described in detail at this specification after a while.
First switching device can comprise an adopted solid switch device in quite low power application, but it preferably includes a relay with coil, and this coil is encouraged by the actuating signal of first energy storage device output.That is to say, offer the action/lock current of relay coil, is to export from first energy storage device under the condition of control.
For the thermal losses that can not receive minimizes and/or for fear of the needs of radiator, solid-state second switch device preferably includes low-impedance device, that is to say, under its conducting state, the impedance that is presented is for average 10 amperes electric current, and caused voltage drop is not more than average about 500 millivolts.The second switch device preferably includes mos field effect transistor (MOSFET) device.
In initial time interim of each positive half period of power supply, preferably arrange gating circuit that second switch device gate is arrived " disconnection " state, and thereafter, for the remaining positive half period and the next follow-up negative half-cycle of power supply, be " connection " state with second switch device gate.Adopt this method, just no longer need: needed Schottky (Shottky) diode and the fin that interrelates in one in aforesaid art methods.
During the second switch device was arrived the time interval of " disconnection " by gate, the voltage at second switch device two ends rose and is used to first and second energy storage devices output charging current.Yet gating circuit forbidden effectively, moves conducting state up to first switching device.
The second switch device can be caused preferably that by the gate selection in the time interval during " disconnection " state the voltage at device two ends rises to 10 volts to 20 volts magnitude.
Preferably include a processor as top defined switching circuit, make it can respond input signal, and act on the control action of first switching device from hand switch device, near detector, luminosity grade transducer, motion detector, remote control (infrared ray or radio frequency) signal transducer or other this type of device.
From the following description of the preferred embodiment of switching circuit, will more fully understand the present invention.This circuit will be described with reference to the accompanying drawings.
Description of drawings
In the accompanying drawings:
Fig. 1 shows the part details of switching circuit and the figure of part summary; And
Fig. 2 shows the circuit diagram of the assembly that comprises switching circuit as shown in fig. 1 and additional selectable process circuit.
Embodiment
As shown in fig. 1, switching circuit 10 is used to control the excitation of the incandescent lamp 11 of being installed on the ceiling 12.This lamp is installed on the accessory 13, and this accessory 13 comprises: loop terminal 14, switched active terminal 15 and neutral terminal 16.This switching circuit is connected to the charged and switched active terminal of lamp fitting 13 by two-wire conductor 17.
Two-wire single phase alternating current power supply 18 is provided on the ceiling 12 in due form.
Comprise two capacitor C
2And C
421 cross-over connections of first energy storage device in, promptly be connected in parallel on first and second switching devices 19 and 20, and be arranged under the controlled condition, as after this described, so that action power is sent to the coil 22 of relay 19.Equally, comprise capacitor C
323 cross-over connections of second energy storage device on MOS (metal-oxide-semiconductor) memory 20, and be arranged to be used for storing the power supply of gate MOS (metal-oxide-semiconductor) memory 20.
With the gating circuit 24 that MOS (metal-oxide-semiconductor) memory 20 interrelates, be used at the relay 19 passive time durations of accomplishing conducting state, act on regular " disconnection "-" connection " gate of MOS (metal-oxide-semiconductor) memory 20.
Between relay-MOS (metal-oxide-semiconductor) memory point of contact 27 and first energy storage device 21, exist circuit to be connected 25, so that during " disconnection " gate of MOS (metal-oxide-semiconductor) memory 20 and after the action of relay 19, via capacitor C
2The charging of first energy storage device is provided.Equally, during " disconnection " gate of MOS (metal-oxide-semiconductor) memory 20, circuit connection 26 provides regular charging, i.e. capacitor C for second energy storage device 23
3Charging, wherein, connect 23 cross-over connections of 26, the second energy storage devices on MOS (metal-oxide-semiconductor) memory 20 by described circuit.
Now, the while is described the operation of switching circuit 10 with reference to figure 1 and Fig. 2.
As initial condition, suppose that relay 19 disconnects, promptly unperturbed, and, do not supply with the power supply of gating circuit 24, MOS (metal-oxide-semiconductor) memory 20 is non-conduction.Then, during continuous positive half period, as indicated, be no-voltage with respect to energy storage device, electric current is flowing through lamps 11, with to capacitor C
2Charging, and during continuous negative half-cycle, the electric current charged connection of will flowing through is with to capacitor C
4Charging.According to lamp resistance, capacitor C
2And C
4Usually completely charged to 48 volts total, series voltage level, by Zener diode ZD2 and ZD4 decision, and will be above the time durations in about 20 cycles.
In any moment thereafter, along with the operation of switch 29, the relay 19 passive conducting states of accomplishing.The excitation power supply that is used for relay coil is from capacitor C
2And C
4Middle output.Thereafter, along with the voltage that occur to surpass an initial time in first and each positive half period subsequently of power supply rises, the drain voltage on MOS (metal-oxide-semiconductor) memory device 20 will make the electric current diode D that flows through
4, with to capacitor C
3Charging, and the diode D that flows through
5, with to capacitor C
2Charging.
Work as capacitor C
3When being charged to the level that makes Zener diode ZD1 and ZD3 conducting, output from latch U1A is used to: the remaining positive half period of power supply the duration and next follow-up negative half-cycle in, with MOS (metal-oxide-semiconductor) memory 20 gates to " connection " state.Only it should be noted that after the initial setting up of latch U1A and resetting subsequently, just with MOS (metal-oxide-semiconductor) memory 20 gates to " connection " state.Before the closure of relay 19, not to capacitor C
3Charging, this just guarantees that MOS (metal-oxide-semiconductor) memory 20 is " disconnection " by initial lock.
In addition, in the beginning of each positive half period of power supply, the latch U1A that resets detects voltage and rises, and latch U1A is reset to " disconnections " state, and causing MOS (metal-oxide-semiconductor) memory so conversely is that " disconnection " one is by capacitor C by gate
3The initial time of charging interval decision.In the minimum interval of each positive half period of power supply, promptly 0.5 to 1.5 microsecond during, can realize the charging of first energy storage device 21 and the charging of second energy storage device 23.
The personnel that are familiar with traditional circuit design will be understood that shown in Fig. 2 but and the requirement and the function of unspecified various circuit units.Circuit shown in Fig. 2 also is applicable to satisfied: certain loads and other requirement when work of the scheme shown in Fig. 1.
Yet as can be seen, by selecting the latch offset resistor R4 of low value, as shown in Figure 2, this switching circuit can use lamp or other load with wide operating power scope.Under the situation of relative heavy load, circuit will be worked in above-mentioned mode, and electric current is with relay 19 and the MOS (metal-oxide-semiconductor) memory 20 of flowing through simultaneously.Yet during each positive half period of power supply, under the very little situation of load current, low voltage drop will appear in resistance R 4 two ends, can not operable lock storage U1A, and load current will the flow through resistance R 4 rather than the MOS (metal-oxide-semiconductor) memory of flowing through.Then, during each negative half-cycle of power supply, utilize the intrinsic backward diode characteristic of MOS (metal-oxide-semiconductor) memory device, the electric current MOS (metal-oxide-semiconductor) memory of will flowing through.Depend on various circuit parameters, can adopt device, hold scope 20 milliamperes to the load current between 16 peaces, promptly surpass 3 orders of magnitude nearly.
Claims (9)
1. switching circuit comprises:
First switching device that can be electronic, its be arranged to single phase alternating current circuit in load be connected in series;
Solid-state second switch device, itself and first switching device are connected in series;
First energy storage device, it strides the connection of first and second switching devices, and is arranged under the controlled condition, so that action power is sent to first switching device;
Second energy storage device, it strides the connection of second switch device, and is arranged to be used for storing the power supply that is used for gate second switch device;
Gating circuit interrelates with second energy storage device, and be arranged to first switching device passive as conducting state during, act on regular " disconnection "-" connection " gate of second switch device; And
Circuit connects, the tie point of first and second switching devices, and first and second energy storage devices between, this circuit connects and is used for providing the charging of first energy storage device and the charging of second energy storage device during " disconnection " gate of second switch device.
2. switching circuit as claimed in claim 1, wherein, first energy storage device comprises at least one electric capacity.
3. switching circuit as claimed in claim 1, wherein, second energy storage device comprises at least one electric capacity.
4. switching circuit as claimed in claim 1, wherein, first switching device comprises the electromagnetic relay with an actuation coil, described actuation coil is connected with first energy storage device in circuit.
5. switching circuit as claimed in claim 1, wherein, the second switch device comprises a MOS (metal-oxide-semiconductor) memory element.
6. switching circuit as claimed in claim 1, wherein, in initial time interim of each positive half period of AC power, it is " disconnection " state that this gating circuit is arranged to second switch device gate, and thereafter, remaining positive half period and next follow-up negative half-cycle for AC power, with second switch device gate is " connection " state, and wherein, during the second switch device is the time interval of " disconnection " state by gate, utilize the voltage at second switch device two ends to rise, charging current is exported to first and second energy storage devices.
7. switching circuit as claimed in claim 6, wherein, before first switching device moved conducting state, gating circuit was arranged to halted state effectively.
8. switching circuit as claimed in claim 7, wherein, gating circuit comprises: latch, described latch initially are arranged to lock MOS (metal-oxide-semiconductor) memory and are " disconnection " state; Reset with latching, its function is after predetermined positive voltage rises, and described latch is reset to " connection " state, and with this gate second switch device.
9. switching circuit as claimed in claim 8, wherein, the circuit that interrelates with latch comprises the low value biasing resistor, it is arranged to the carry load electric current this resistance, otherwise, in the continuous half period of AC power, when the voltage drop at these resistance two ends is not enough to be provided with latch and gate second switch device for " connection " state, this load current will flow through the second switch device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPR1635A AUPR163500A0 (en) | 2000-11-23 | 2000-11-23 | Two-wire controlled switching |
| AUPR1635 | 2000-11-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1476671A true CN1476671A (en) | 2004-02-18 |
| CN1214527C CN1214527C (en) | 2005-08-10 |
Family
ID=3825675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018193315A Expired - Fee Related CN1214527C (en) | 2000-11-23 | 2001-11-09 | Two-wire controlled switching |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1350322A4 (en) |
| CN (1) | CN1214527C (en) |
| AU (2) | AUPR163500A0 (en) |
| CA (1) | CA2429565A1 (en) |
| NZ (1) | NZ525729A (en) |
| WO (1) | WO2002043244A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101213885B (en) * | 2005-06-30 | 2012-06-06 | 路创电子公司 | Dimmer having a microprocessor-controlled power supply |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8004122B2 (en) | 2008-08-13 | 2011-08-23 | Zarlink Semiconductor (U.S.) Inc. | Bootstrap supply for switched mode power converter |
| US8680783B2 (en) | 2011-08-10 | 2014-03-25 | Cree, Inc. | Bias voltage generation using a load in series with a switch |
| US8981673B2 (en) | 2012-03-12 | 2015-03-17 | Cree, Inc. | Power supply that maintains auxiliary bias within target range |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4274045A (en) * | 1979-04-09 | 1981-06-16 | Richard Goldstein | Power supply and control circuit for series connected controller |
| JPS60117518A (en) * | 1983-11-28 | 1985-06-25 | オムロン株式会社 | Relay unit |
| US4878010A (en) * | 1987-12-10 | 1989-10-31 | Weber Harold J | Electric a.c power switch controller and d.c. power supply method and apparatus |
| DK628788A (en) * | 1987-12-12 | 1989-06-13 | Insta Elektro Gmbh & Co Kg | BRIGHTNESS ADJUSTMENT CIRCUIT |
| US5038081A (en) * | 1987-12-16 | 1991-08-06 | Lutron Electronics Co., Inc. | Reverse phase-controlled dimmer |
| JP2780566B2 (en) * | 1992-06-10 | 1998-07-30 | 株式会社日立製作所 | Power converter |
| US5907198A (en) * | 1996-03-05 | 1999-05-25 | Molex Incorporated | Trickle power supply |
| GB2330704A (en) * | 1997-10-21 | 1999-04-28 | Timeguard Limited | Semiconductor AC switch units |
| DE19807517A1 (en) * | 1998-02-21 | 1999-08-26 | Insta Elektro Gmbh & Co Kg | Electronic two wire switch for controlling electronic loads e.g. incandescent lamps |
| AU748268B2 (en) * | 1998-04-16 | 2002-05-30 | H.P.M. Industries Pty Limited | Controlled switching circuit |
| AU757994B2 (en) * | 1999-03-25 | 2003-03-13 | H.P.M. Industries Pty Limited | Control circuit |
-
2000
- 2000-11-23 AU AUPR1635A patent/AUPR163500A0/en not_active Abandoned
-
2001
- 2001-11-09 EP EP01983290A patent/EP1350322A4/en not_active Withdrawn
- 2001-11-09 AU AU1480302A patent/AU1480302A/en active Pending
- 2001-11-09 CA CA002429565A patent/CA2429565A1/en not_active Abandoned
- 2001-11-09 NZ NZ525729A patent/NZ525729A/en not_active IP Right Cessation
- 2001-11-09 CN CNB018193315A patent/CN1214527C/en not_active Expired - Fee Related
- 2001-11-09 WO PCT/AU2001/001451 patent/WO2002043244A1/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101213885B (en) * | 2005-06-30 | 2012-06-06 | 路创电子公司 | Dimmer having a microprocessor-controlled power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1480302A (en) | 2002-06-03 |
| AUPR163500A0 (en) | 2000-12-14 |
| NZ525729A (en) | 2003-08-29 |
| CN1214527C (en) | 2005-08-10 |
| WO2002043244A1 (en) | 2002-05-30 |
| CA2429565A1 (en) | 2002-05-30 |
| EP1350322A1 (en) | 2003-10-08 |
| EP1350322A4 (en) | 2005-02-09 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |