CN206602700U - Direct current supply electric ballast - Google Patents
Direct current supply electric ballast Download PDFInfo
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- CN206602700U CN206602700U CN201720147994.9U CN201720147994U CN206602700U CN 206602700 U CN206602700 U CN 206602700U CN 201720147994 U CN201720147994 U CN 201720147994U CN 206602700 U CN206602700 U CN 206602700U
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- direct current
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- electric ballast
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Abstract
The utility model discloses a kind of direct current supply electric ballast, solve, its drip irrigation device is, including undervoltage protection device, undervoltage protection device detects signal and in response to the execution unit of detection signal to export the detection unit of detection signal and be coupled to detection unit including the undervoltage condition for detection output mouthful to receive, detection unit has a reference value, a reference value corresponds to critical voltage value, direct current supply electric ballast of the present utility model, detection unit can detect the undervoltage condition of electronic ballast output end mouthful, if generation undervoltage condition, then execution unit can cut off the electricity supply input at once, so that dc source is stopped power supply, power supply is avoided to be vented；Switch unit can switch to power input the dc source of different voltages, to adapt to different operating modes；Tube starting circuit design is pipeline start up by preheating mode, allows the fluorescent tube number of starts up to up to ten thousand times, is adapted to the place of the frequent starter of fluorescent tube needs, it is possible to achieve the fluctuation range of 12V~48V ± 10%.
Description
Technical field
The utility model is related to ballast, more particularly to direct current supply electric ballast.
Background technology
Electric ballast refers to drive electric light source using electronic technology, is allowed to produce the required electronic equipment illuminated.It is modern
Fluorescent lamp more and more uses electric ballast, light compact, it might even be possible to which electric ballast and fluorescent tube etc. are integrated in into one
Rise, meanwhile, electric ballast can generally have starter function concurrently, so can save single starter again.Direct current supply electricity
Sub-ballast can be powered by dc source, be widely used in portable UV lamp etc. using dc source power it is portable
Light fixture.
Existing direct current supply electric ballast external 12V or 24V dc source is powered, and first passes through amplifying circuit
The direct current after lifting is changed by the DC voltage of the voltage increase of dc source to 300V or higher, then by inverter circuit
For alternating current, so that fluorescent tube is used.
Can electric ballast under-voltage phenomenon occurs in use, often, it is under-voltage to refer to due to originals such as short troubles
Cause, the phenomenon that line voltage distribution can in a short time occur being greatly lowered or even disappear, in the event of under-voltage phenomenon, the electricity of circuit
Pressure will reduce terribly, can be obtained by calculation formula P=UI of power, electric current can steeply rise, so, the electricity of power supply
It can in a short time be vented, and substantial amounts of heat can be produced, infringement is brought to circuit and DC power supply, influence power supply
Service life.
Utility model content
The purpose of this utility model, which is to provide, can carry out the direct current supply electric ballast of under-voltage protection.
Above-mentioned technical purpose of the present utility model technical scheme is that：
A kind of direct current supply electric ballast, including it is defeated to export the power supply of direct current power source voltage for coupling dc source
Enter end, the power input is coupled with for receiving direct current power source voltage and direct current power source voltage being amplified and exported directly
The amplifying circuit of big voltage is banished, the amplifying circuit is coupled with for receiving direct current amplification voltage and turning direct current amplification voltage
It is changed into the inverter circuit of alternating voltage, the inverter circuit is coupled with the output port for connecting tube, in addition to under-voltage guarantor
Protection unit, the undervoltage protection device includes being used for the undervoltage condition of detection output mouthful exporting the detection unit of detection signal
Signal is detected to receive and in response to the execution unit of detection signal, the detection unit has a base with detection unit is coupled to
Quasi- value, a reference value corresponds to critical voltage value；
When the magnitude of voltage that detection unit detects output port is less than critical voltage value, the execution unit is cut off the electricity supply
Input.
Using such scheme, detection unit can detect the undervoltage condition of electronic ballast output end mouthful, if occurring under-voltage
Situation, then execution unit can cut off the electricity supply at once input so that dc source is stopped power supply, it is to avoid power supply is vented.
Preferably, the detection unit includes under-voltage test section and the comparing section with an a reference value, the under-voltage inspection
Survey portion is used to the undervoltage condition of detection output mouthful export brown-out detection signal；The comparing section be coupled to under-voltage test section with
Receive brown-out detection signal, and after the value of brown-out detection signal and a reference value are compared output detection signal to performing list
Member.
Using such scheme, the undervoltage condition that comparing section can obtain under-voltage test section with a reference value by being compared
Output detection signal makes detection process more accurate to execution unit afterwards.
Preferably, the output end of the comparing section is coupled with for shunting to reduce the feedback of detection signal voltage value
Portion.
Using such scheme, feedback section can be dropped the magnitude of voltage for detecting signal by shunting after execution unit work
It is low, it is to avoid the working condition of execution unit is fluctuated near a reference value.
Preferably, the execution unit includes being coupled to detection unit receiving detection signal and output switching signal
Switch element and it is coupled to switch element to receive switching signal and in response to switching signal with input of cutting off the electricity supply at once
Executive component.
Using such scheme so that integrated circuit is simpler, using more convenient, exploitativeness is improved, while simple
Single circuit is more easy-maintaining and safeguards, further improves the feasibility of scheme.
Preferably, also including switching switch K-1, the power input includes the first power input and second source
Input, the c ends of the switching switch K-1 are coupled to the input of amplifying circuit, and a ends are coupled to the first power input, b ends
It is coupled to second source input.
Using such scheme, switching switch can switch to power input the dc source of different voltages, to adapt to
Different operating modes.
Preferably, the switching switch K-1 is coupled with the switching on-off circuit for controlling switching switch K-1 actions.
Using such scheme, switching on-off circuit can control switching switch K-1 operation, so as to realize switching switch
Long-range switching.
Preferably, the inverter circuit is push pull forward circuit.
Using such scheme, two switch alternate conductions in push pull forward circuit, are formed respectively at corresponding winding two ends
The alternating voltage of opposite in phase, output voltage can be just changed by changing dutycycle so that control more facilitates.
In summary, the utility model has the advantages that：
1st, detection unit can detect the undervoltage condition of electronic ballast output end mouthful, if occurring undervoltage condition, perform
Unit can cut off the electricity supply input at once, so that dc source is stopped power supply, it is to avoid power supply is vented；
2nd, switching switch can switch to power input the dc source of different voltages, to adapt to different operating modes；
3rd, tube starting circuit design is pipeline start up by preheating mode, allows the fluorescent tube number of starts up to up to ten thousand times, is adapted to fluorescent tube
Need the place of frequent starter.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model；
Fig. 2 is the circuit diagram of undervoltage protection device in the utility model.
In figure：1st, the first power input；2nd, amplifying circuit；3rd, inverter circuit；4th, output port；5th, under-voltage protection is filled
Put；6th, execution unit；7th, under-voltage test section；8th, comparing section；9th, feedback section；10th, on-off circuit is switched；11st, reference section；12nd,
Two power inputs.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
This specific embodiment is only to explain of the present utility model, and it is not to limitation of the present utility model, ability
Field technique personnel can make the modification without creative contribution to the present embodiment as needed after this specification is read, but
As long as all being protected in right of the present utility model by Patent Law.
A kind of direct current supply electric ballast disclosed in the present embodiment, as shown in figure 1, including for couple dc source with
The power input of direct current power source voltage is exported, power input is coupled with for receiving direct current power source voltage and by dc source
Voltage is amplified and exported the amplifying circuit 2 that direct current amplifies voltage, and amplifying circuit 2 is coupled with for receiving direct current amplification voltage
And direct current is amplified into the inverter circuit 3 that voltage is changed into alternating voltage, inverter circuit 3 is push pull forward circuit, the coupling of inverter circuit 3
The output port 4 for connecting tube, in addition to undervoltage protection device 5 are connected to, undervoltage protection device 5 includes being used to detect output
The undervoltage condition of port 4 with export detection signal detection unit and be coupled to detection unit with receive detection signal and in response to
The execution unit 6 of signal is detected, detection unit has an a reference value, and a reference value corresponds to critical voltage value；When detection unit inspection
When the magnitude of voltage for measuring output port 4 is less than critical voltage value, execution unit 6 is cut off the electricity supply input.
As shown in Fig. 2 detection unit includes under-voltage test section 7 and the comparing section 8 with an a reference value.
As shown in Fig. 2 under-voltage test section 7 is used to the undervoltage condition of detection output mouthful 4 export brown-out detection signal, owe
Test section 7 is pressed to include resistance R57, R58 and R60, resistance R57 one end is coupled to output port 4, and the other end is coupled to resistance
R58 one end, the resistance R58 other end is coupled to resistance R60 one end, resistance R60 other end ground connection.
As shown in Fig. 2 wherein resistance R58 and R60 constitute bleeder circuit, and when flowing through both electric current increases, resistance
Tie point voltage increase between R58 and R60；Conversely, voltage reduces.Resistance R57 plays a part of current limliting.
As shown in Fig. 2 comparing section 8 is also coupled to the reference section 11 for providing a reference value, reference section 11 includes resistance
R61, voltage-stabiliser tube ZD6 and electric capacity C21, resistance R61 one end are coupled to resistance R57 and R58 tie point, and the other end is coupled to surely
Pressure pipe ZD6 negative electrode, voltage-stabiliser tube ZD6 plus earth, electric capacity C21 is parallel to voltage-stabiliser tube ZD6 two ends.
As shown in Fig. 2 comparing section 8 is coupled to under-voltage test section 7 to receive brown-out detection signal, and by brown-out detection signal
Value and a reference value be compared after output detection signal to execution unit 6.Comparing section 8 is comparator IC3, its normal phase input end
Resistance R61 and voltage-stabiliser tube ZD6 tie point are coupled to, inverting input is coupled to resistance R58 and resistance R60 tie point.
As shown in Fig. 2 the output end of comparing section 8 is coupled with for shunting to reduce the feedback section 9 of detection signal voltage value.
Feedback section 9 includes resistance R54, R59 and triode Q10, and resistance R54 one end is coupled to comparator IC3 output end, the other end
Triode Q10 base stage, triode Q10 grounded emitter are coupled to, colelctor electrode is coupled to resistance R59 one end, resistance R59
The other end be coupled to comparator IC3 inverting input.
As shown in Fig. 2 execution unit 6 includes triode Q9, resistance R53, relay KA and fly-wheel diode VD3, relay
One end of device KA coil is coupled to voltage V3, and the other end is coupled to triode Q9 colelctor electrode, and triode Q9 emitter stage connects
Ground, base stage is coupled to resistance R53 one end, and the resistance R53 other end is coupled to comparator IC3 output end to receive detection letter
Number, fly-wheel diode VD3 and relay KA coil inverse parallel.
When under-voltage phenomenon occurs in output port 4, the voltage of its end will be reduced, and corresponding electric current will drastically rise
Height, when electric current rises to voltage-stabiliser tube ZD6 breakdown voltage, voltage-stabiliser tube ZD6 will be breakdown so that resistance R61 and voltage-stabiliser tube
Tie point voltage between ZD6 can be maintained at a stationary value, so as to provide benchmark electricity for comparator IC3 in-phase input end
Pressure.At this moment the tie point voltage reduction between resistance R60 and resistance R58, when the voltage less than comparator IC3 in-phase input ends
When, the detection signal of comparator IC3 output high level turns on triode Q9, relay KA line to triode Q9 base stage
Electric adhesive is enclosed to obtain, its corresponding normally-closed contact KA-1 disconnects, with input of cutting off the electricity supply, so as to play a protective role, it is to avoid straight
Stream power supply is vented because under-voltage.
As shown in figure 1, also including switching switch K-1, power input includes the first power input 1 and second source is defeated
Enter end 12, the first power input 1 and second source input 12 can be respectively intended to connect 12V and 24V dc source.Switching
Switch K-1 c ends are coupled to the input of amplifying circuit 2, and a ends are coupled to the first power input 1, and b ends are coupled to the second electricity
Source input 12.
As shown in figure 1, switching switch K-1 is coupled with the switching on-off circuit 10 for controlling switching switch K-1 actions.Cut
Changing on-off circuit 10 includes triode Q3, relay K, diode VD4 and normally opened button SB, one end coupling of relay K coil
Voltage V1 is connected to, the other end is coupled to triode Q3 colelctor electrode, triode Q3 grounded emitter, diode VD4 and relay
Device K coil inverse parallel, diode VD4 plays a part of afterflow, when relay K coil blackout, remains in coil
Electric current can be discharged by diode VD4, prevent from impacting triode Q3 colelctor electrode, normally opened button SB one end coupling
Voltage V2 is connected to, the other end is coupled to triode Q3 base stage, and switching switch K-1 is the contact corresponding to relay K.When normally opened
When button SB is off, triode Q3 is not turned on, and relay K coil must not electricity, the switching switch K-1 corresponding to it
A ends are switched to, are connected with the first power input 1；On the contrary, when normally opened button SB is closed, triode Q3 base stage passes through
Voltage V2 receives high level signal and turned on, and relay K coil is obtained electric adhesive, switching switch K-1 is switched to b ends,
It is connected with second source input 12, so as to realize the switching between different dc sources.
The DC voltage of more than ten volts or tens volts can be promoted to 300V or higher DC voltage by amplifying circuit 2；It is permanent
Power designs can make fluorescent tube power output keep constant；Tube starting circuit design is pipeline start up by preheating mode, makes opening for fluorescent tube
Dynamic number of times can reach that being more suitable for fluorescent tube needs the place of frequent starter up to ten thousand times；Wide-voltage range design can realize 12V
The fluctuation ranges of~48V ± 10%.
Claims (7)
1. a kind of direct current supply electric ballast, including for coupling dc source to export the power input of direct current power source voltage
End, the power input is coupled with for receiving direct current power source voltage and being amplified direct current power source voltage and export direct current
Amplify the amplifying circuit (2) of voltage, the amplifying circuit (2) is coupled with for receiving direct current amplification voltage and direct current being amplified into electricity
Pressure is changed into the inverter circuit (3) of alternating voltage, and the inverter circuit (3) is coupled with the output port (4) for connecting tube,
It is characterized in that：Also include undervoltage protection device (5), the undervoltage protection device (5) includes being used for owing for detection output mouthful (4)
Pressure situation detects signal and in response to detection signal to export the detection unit of detection signal and be coupled to detection unit to receive
Execution unit (6), the detection unit have an a reference value, a reference value correspond to critical voltage value；
When the magnitude of voltage that detection unit detects output port (4) is less than critical voltage value, execution unit (6) the cut-out electricity
Source input.
2. direct current supply electric ballast according to claim 1, it is characterized in that：The detection unit includes under-voltage detection
Portion (7) and the comparing section (8) with an a reference value, the under-voltage test section (7) are used for the undervoltage condition of detection output mouthful (4)
To export brown-out detection signal；The comparing section (8) is coupled to under-voltage test section (7) to receive brown-out detection signal, and will owe
Output detects signal to execution unit (6) after the value of pressure detection signal is compared with a reference value.
3. direct current supply electric ballast according to claim 2, it is characterized in that：The output end coupling of the comparing section (8)
It is connected to for shunting to reduce the feedback section (9) of detection signal voltage value.
4. direct current supply electric ballast according to claim 3, it is characterized in that：The execution unit (6) includes coupling
Believed in detection unit with receiving the switch element of detection signal and output switching signal and being coupled to switch element with receiving switch
Number and in response to switching signal with the executive component for input of cutting off the electricity supply at once.
5. direct current supply electric ballast according to claim 4, it is characterized in that：Also include switching switch K-1, the electricity
Source input includes the first power input (1) and second source input (12), and the c ends of the switching switch K-1 are coupled to
The input of amplifying circuit (2), a ends are coupled to the first power input (1), and b ends are coupled to second source input (12).
6. direct current supply electric ballast according to claim 5, it is characterized in that：The switching switch K-1 is coupled with use
In the switching on-off circuit (10) of control switching switch K-1 actions.
7. direct current supply electric ballast according to claim 6, it is characterized in that：The inverter circuit (3) pushes away for normal shock
Draw circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016206438156 | 2016-06-24 | ||
| CN201620643815 | 2016-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206602700U true CN206602700U (en) | 2017-10-31 |
Family
ID=60146698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720147994.9U Active CN206602700U (en) | 2016-06-24 | 2017-02-18 | Direct current supply electric ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206602700U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110888A (en) * | 2017-11-20 | 2018-06-01 | 上海裕达实业有限公司 | It is switched fast power circuit and its switching method |
-
2017
- 2017-02-18 CN CN201720147994.9U patent/CN206602700U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110888A (en) * | 2017-11-20 | 2018-06-01 | 上海裕达实业有限公司 | It is switched fast power circuit and its switching method |
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