CN2935618Y - Electronic control equipment - Google Patents
Electronic control equipment Download PDFInfo
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- CN2935618Y CN2935618Y CN 200520105298 CN200520105298U CN2935618Y CN 2935618 Y CN2935618 Y CN 2935618Y CN 200520105298 CN200520105298 CN 200520105298 CN 200520105298 U CN200520105298 U CN 200520105298U CN 2935618 Y CN2935618 Y CN 2935618Y
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- controlled installation
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Abstract
The utility model provides an electronic control device, comprising an AC/DC converting circuit; a switching circuit being connected with the AC/DC converting circuit, which is designed to apply a voltage on a load at a first status and remove the voltage at a second status; a control circuit being connected with the AC/DC converting circuit, which is designed to switch-over between the first status and the second status of the switching circuit; a zero-cross voltage sampling circuit being designed to provide clock impulses for the control circuit; which is characterized in that the electronic control device also has a bootstrap power supply, being connected with the AC/DC converting circuit, and the output terminals of the bootstrap power supply are connected with the switching circuit and the control circuit. This utility model provides circuits with discrete components to regulate the power of capacitive loads.
Description
Technical field
The utility model relates to a kind of control system, and more specifically, the utility model relates to a kind of electronic-controlled installation that is used for the power of control load.
Background technology
In lighting field, extensively adopt efficient illumination at present.Utilizing high-frequency electronic ballast to carry out energy-conservationly forbidding under the condition of work of full load especially, light modulation is a kind of power control device that adopts usually.Light adjusting system utilizes the control signal of dimmer to realize dimming function by one of regulating frequency, duty ratio, DC bus voltage and four parameters of resonance impedance.The operation principle of dimmer has following three kinds usually:
1. input ac voltage is carried out conduction phase angle control;
2. the low-voltage direct dim signal of 0-10V is provided from the outside;
On input ac voltage the stack count pulse control mode.
Above-mentioned every kind of method all has its characteristics.First method can low-costly easily realize not needing simultaneously to change the assembling wiring of lamp, thereby is widely used.Two lead-in wires that second method need be added obtain the dim signal of 0-10V.Expensive dimmer and complicated assembling have hindered the application of this method in a lot of fields.The third method is restricted because of its single load characteristic, and simultaneously, the distortion of input current and noise also are the problems that this method exists.
At present, adopt first kind of method that exchanges phase control to come the power output of regulating load usually.Fig. 1 shows the block diagram that exchanges phase control.Exchange phase control method and comprise forward position phase control method and back along phase control method, these two kinds of methods all realize phase control by the voltage that is partly cut away in the load by controller.For the forward position phase control, controller is exchanging the shutoff of no-voltage point, and recovers on-state at all after dates of setting, and load this moment obtains power.The back is at first connected and is recovered off state at all after dates of setting exchanging no-voltage point control device along control in contrast.Along in the control light-dimming method, complex circuit design has caused corresponding higher cost in existing back.
In various types of electric loadings, the lamp of gas discharge type and relevant ballast thereof are to be difficult to the electric loading type regulating and control.Here said gaseous discharge lamp comprises fluorescent lamp, high-intensity discharge lamp that has or do not have independent heater and any lamp that demonstrates negative resistance property usually.When the light that the light output that can get whenever the standard of this lamp can not be satisfied environment requires with required light level, just need regulate the power of lamp.Therefore need a kind of being used for that this lamp is carried out the control system of light modulation with the related work cost of minimizing energy loss and lamp.
In the prior art, the forward position phase controller component number simple in structure because of it, that adopted with bidirectional triode thyristor dimmer is few, cost is back lower along controller than circuit structure complexity, and is widely used.But under forward position controller with bidirectional triode thyristor dimmer and situation that capacitive load is together used, the ac cycle of each input voltage, instantaneously all can produce sharp-pointed impulse current pulse on capacitive load what capacitive load was powered up, this all is not wish the phenomenon that occurs concerning load and control circuit.The back of no-voltage connection can not produce the problems referred to above along control circuit when together using with capacitive load, adopt the back to have lower total harmonic distortion and noise along the method for control simultaneously, so the back more is applicable to capacitive load usually along phase controller.
In phase-control circuit, there is dual mode to provide power control circuit work necessary power supply usually, a kind of is to introduce power supply from the outside, another kind is that the components and parts by control circuit inside form power supply.Introduce power supply from the outside, extra power supply, lead-in wire or interface must be provided, this has not only increased design complexity and has increased circuit cost simultaneously.Fig. 2 shows a kind of schematic diagram of power control circuit.It is other element power supply that the voltage drop that for example produces on resistor R 1 and the transistor Q1 with the components and parts of principal current in major loop in this control circuit is used as voltage source.The problem that this circuit exists is that in order to reach required magnitude of voltage, resistor R 1 and transistor Q1 must bear very big power consumption.This causes, and the components and parts volume increases, cost increases, and brings problem such as heat radiation.
Therefore, the purpose of this utility model is to provide a kind of electronic-controlled installation cheaply with conventional discrete component structure.
The utility model content
Electronic-controlled installation of the present utility model has been realized above-mentioned purpose.In according to electronic-controlled installation of the present utility model, only exchanging the no-voltage point, the voltage zero-cross sample circuit is in off state and provides a high level narrow pulse signal.Phase-control circuit starts under the effect of this pulse signal, and drive circuit produces strong driving pulse simultaneously.Switching circuit is with on-state work at this moment, and load obtains power from power supply.After the time cycle of setting, the drive voltage pulses of phase-control circuit disappears.Switching circuit enters off state, and load and power supply disconnect and exchange the no-voltage point up to next cycle.Realized power adjustments according to electronic-controlled installation of the present utility model thus to load.
In according to the utility model electronic-controlled installation, provide a bootstrap power supply, for phase-control circuit and drive circuit provide electric energy.
According to the utility model, a kind of electronic-controlled installation is provided, comprising:
An AC/DC change-over circuit;
A switching circuit couples with described AC/DC change-over circuit, is used for supply voltage is applied to load and in second operating state supply voltage is removed from load at first state;
A control circuit couples with described switching circuit and AC/DC change-over circuit, is used to control the conversion of described switching circuit between described first state and second state;
A voltage zero-cross sample circuit is used to described control circuit that clock pulse is provided;
It is characterized in that this electronic-controlled installation also comprises a bootstrap power supply, this bootstrap power supply and described AC/DC change-over circuit couple, and its output and described switching circuit and described control circuit couple.
According to the utility model, provide a kind of driver that comprises above-mentioned electronic-controlled installation.
According to the utility model, provide a kind of lamp that comprises electric ballast and above-mentioned electronic-controlled installation.
According to the utility model, realized the power of load being regulated with the electronic-controlled installation cheaply that the discrete component of routine is constructed.
Description of drawings
Fig. 1 exchanges the phase control system block diagram.
Fig. 2 is the circuit diagram of the driver of prior art.
Fig. 3 is according to the circuit block diagram of electronic-controlled installation of the present utility model.
Fig. 4 is the circuit diagram according to electronic-controlled installation of the present utility model.
Fig. 5 is in the oscillogram according to the different test points place of electronic-controlled installation of the present utility model.
Embodiment
Fig. 3 shows the circuit block diagram according to electronic-controlled installation of the present utility model.As shown in the figure, this electronic-controlled installation 100 comprises AC/DC change-over circuit 12; Be used to connect/switching circuit 14 of voltage on the switching off load; Be used for phase control and drive circuit 16 that the operating state of switching circuit 14 is controlled; Be used for providing the voltage zero-cross sample circuit 18 of clock pulse in each switch periods; Be used to components and parts in the electronic-controlled installation that the bootstrap power supply 20 of energy is provided.
In this manual, term " switch periods " is meant the cycle between two adjacent in ac cycle voltage over zero.
Fig. 4 is the circuit diagram according to electronic-controlled installation of the present utility model.In according to electronic-controlled installation circuit of the present utility model, the AC/DC transducer 12 that diode D1-D4 constitutes is connected with communication power supply, be used for alternating current is converted to direct current, so that use the power control circuit that constitutes by direct current component to realize the interchange of load is controlled.Switching circuit 14 comprises gate-controlled switch, MOS transistor Q1 for example, and the source electrode of transistor Q1 couples with transducer 12 mutually with drain electrode, is used for connecting/interchange input on the switching off load.The bootstrap power supply 20 that comprises diode D7 and capacitor C4 links to each other with AC/DC transducer 12, and the input of its output and phase control and drive circuit 16 and the control end of the gate-controlled switch for example grid of transistor Q1 couple mutually.Voltage zero-cross sample circuit 18 comprises resistor R 1, diode D5, D10, D11, resistor R 2, R7, capacitor C2 and transistor Q2.This voltage zero-cross sample circuit 18 is coupled between transducer 12 and phase control and the drive circuit, provides clock pulse in each switch periods for phase control and drive circuit.Phase control and drive circuit 16 comprise for example reverse-blocking tetrode thyristor elements T 1 of resistor R 4, diode D6, resistor R 3, capacitor C3, Zener diode D8 and gate-controlled switch; and resistor R 8, R9, transistor Q3, Zener diode D9 and capacitor C1, wherein Zener diode D9 is used for protective transistor Q1 and avoids being damaged by too high grid voltage.Reverse-blocking tetrode thyristor elements T 1 is connected between the collector electrode of the grid of transistor Q1 and transistor Q2, is used for making when transistor Q2 conducting transistor Q1 to recover off state.The resistor R 4 and the capacitor C3 that are connected in series are in parallel with reverse-blocking tetrode thyristor elements T 1, are used for the shutoff moment of oxide-semiconductor control transistors Q1.
In according to bootstrap power supply of the present utility model, capacitor C4 is recharged during each cycle that transistor Q1 turn-offs and keeps substantially invariable voltage level, diode D7 to be used for preventing that discharge from appearring in capacitor C4 when converter output voltage is low.In addition, this bootstrap power supply also comprises resistor R 5, R6 and capacitor C6, and resistor R 6 is that little resistance resistors is used to reduce surge current, and resistor R 5 and capacitor C6 are used for suppressing to offer the dc voltage of other components and parts of electronic-controlled installation.
The mode of operation of electronic-controlled installation of the present utility model will be described below.AC power offers bootstrap power supply 20 by AC/DC transducer 12 output dc voltages.After the capacitor C4 charging high potential is offered the grid of transistor Q1 in the switching circuit, transistor Q1 conducting by resistor R 8 by capacitor C1.This moment, transducer 12 work were applied to alternating current in the load, and load is started working.
Only exchanging the no-voltage point, the voltage zero-cross sample circuit is in off state and provides a high level narrow pulse signal at the collector electrode of transistor Q2.When the starting point of each switch periods was alternating voltage zero-crossing, diode D5, D10 in the voltage zero-cross sample circuit and D11 both end voltage reduced to zero.Capacitor C2 is by resistor R 2, diode D5, D10, D11 and resistor R 7 discharges, and transistor Q2 is in off state.This moment, reverse-blocking tetrode thyristor elements T 1 reverted to off state by transistor Q2.Simultaneously, capacitor C5 is by resistor R 9 chargings, and transistor Q3 enters on-state afterwards.Capacitor C4 can directly charge to capacitor C1.Strong driving pulse makes transistor Q1 become on-state in the short time.The AC input can be applied in the load at once.
Thereafter, when voltage was begun to rise by zero crossing after rectification, diode D5, D10 and D11 recovered conducting.Total conducting voltage of these diodes can be charged to capacitor C2 sufficiently high current potential, so that transistor Q2 becomes conducting state.Resistor R 1 guaranteed in transistor Q2 shutoff period, and diode D5, D10 and D11 also can be by the sample signals of alternating voltage zero-crossing point of resistor R 1.When capacitor C5 discharged into low level by transistor Q2, transistor Q3 reverted to off state.Capacitor C4 charges so that transistor Q1 is remained on on-state by 8 couples of capacitor C1 of resistor R.
In the time of transistor Q1 conducting, when promptly voltage was begun to rise by zero crossing after rectification, the capacitor C3 in the control circuit was recharged by resistor R 4 and R8.When the voltage on the capacitor C3 is recharged withstand voltage above Zener diode D8, reverse-blocking tetrode thyristor elements T 1 conducting that is triggered, because transistor Q2 is conducting at this constantly, it originally is zero that the grid voltage of transistor Q1 pulled down to base, and transistor Q1 transfers off state to.This moment, the AC/DC transducer was not worked, and alternating current is removed from load, and load quits work.The time constant of resistor R 4 and capacitor C3 charge circuit, promptly the value of resistor R 4 and capacitor C3 determines transistor Q1 to turn-off speed constantly.Usually, resistor R 4 adopts the variable one or more resistors of resistance, and capacitor C3 has fixing capacitance.In the case, the resistance of change resistor R 4 will change the width of conducting pulse.The effective value that is added to the input voltage in the load has directly been controlled in the waveform cutting control that electronic-controlled installation repeatedly carries out in each switch periods, can realize the power adjustments to load.
In the utility model, provide the bootstrap power supply that constitutes by diode D7 and capacitor C4.This bootstrap power supply adopts energy-storage travelling wave tube capacitor C4 as voltage source, has realized that volume is little, cost is low and the negligible power circuit of the heating loss of power circuit.
Though foregoing is described in detail preferred implementation with reference to accompanying drawing, should be appreciated that foregoing is schematic but not determinate.In a preferred embodiment, be that example is illustrated with MOS transistor and reverse-blocking tetrode thyristor element respectively, should be appreciated that can be with other switch element of for example gated transistor IGBT etc. as controllable switch element.It will be appreciated by those skilled in the art that described AC/DC transducer, switching circuit and phase control and drive circuit can adopt alternate manner to realize and do not depart from protection range of the present utility model.Preferred embodiment discloses the situation that power control circuit and the capacitive load that for example has the gaseous discharge lamp of electric ballast are together used, be appreciated that any load that can be applied to when cutting off the power supply, can not produce harmful back-emf voltage according to power control circuit of the present utility model equally.Spirit and scope of the present utility model are only limited by claims and equivalent thereof.
Claims (10)
1. electronic-controlled installation comprises:
An AC/DC change-over circuit;
A switching circuit couples with described AC/DC change-over circuit, is used for supply voltage is applied to load and in second operating state supply voltage is removed from load at first state;
A control circuit couples with described switching circuit and AC/DC change-over circuit, is used to control the conversion of described switching circuit between described first state and second state;
A voltage zero-cross sample circuit is used to described control circuit that clock pulse is provided;
It is characterized in that this electronic-controlled installation also comprises a bootstrap power supply, this bootstrap power supply and described AC/DC change-over circuit couple, and its output and described switching circuit and described control circuit couple.
2. electronic-controlled installation as claimed in claim 1, wherein, described switching circuit comprises first controllable switch element.
3. electronic-controlled installation as claimed in claim 2, wherein, described bootstrap power supply comprises a diode and one first capacitor, the tie point between this diode and the capacitor and the input of described control circuit couples and couple with the control end of described first controllable switch element.
4. electronic-controlled installation as claimed in claim 3, wherein said control circuit comprises a resistor and one second capacitor, and be coupled in second controllable switch element between the control end of second capacitor and first controllable switch element, be used to control the width of the output pulse of described switching circuit.
5. electronic-controlled installation as claimed in claim 4, wherein said voltage zero-cross sample circuit comprises one the 3rd controllable switch element, is used for only providing when the supply voltage zero passage clock pulse.
6. electronic-controlled installation as claimed in claim 5, wherein, the control end of described the 3rd controllable switch element and first end couple with the AC/DC change-over circuit respectively, and the control end of its second end and first gate-controlled switch couples.
7. as the described electronic-controlled installation of one of claim 2, wherein, described first gate-controlled switch is a MOS (metal-oxide-semiconductor) memory.
8. as the described electronic-controlled installation of one of claim 4, wherein said resistor comprises or one group of resistor that resistance is variable.
9. a driver comprises the described electronic-controlled installation as one of claim 1-8.
10. lamp comprises electric ballast and as the described electronic-controlled installation of one of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520105298 CN2935618Y (en) | 2005-09-08 | 2005-09-08 | Electronic control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520105298 CN2935618Y (en) | 2005-09-08 | 2005-09-08 | Electronic control equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2935618Y true CN2935618Y (en) | 2007-08-15 |
Family
ID=38352301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520105298 Expired - Fee Related CN2935618Y (en) | 2005-09-08 | 2005-09-08 | Electronic control equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2935618Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102197709A (en) * | 2008-10-22 | 2011-09-21 | 欧司朗有限公司 | Method and circuit arrangement for making a lamp wattage available for operating at least one gas discharge lamp |
-
2005
- 2005-09-08 CN CN 200520105298 patent/CN2935618Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102197709A (en) * | 2008-10-22 | 2011-09-21 | 欧司朗有限公司 | Method and circuit arrangement for making a lamp wattage available for operating at least one gas discharge lamp |
| US8492994B2 (en) | 2008-10-22 | 2013-07-23 | Osram Gesellschaft Mit Beschrankter Haftung | Method and circuit arrangement for making a lamp wattage available for operating at least one gas discharge lamp |
| CN102197709B (en) * | 2008-10-22 | 2014-10-08 | 欧司朗股份有限公司 | Method and circuit arrangement for making a lamp wattage available for operating at least one gas discharge lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070815 Termination date: 20100908 |