CN103855681B - Light fixture open loop protection circuit - Google Patents
Light fixture open loop protection circuit Download PDFInfo
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- CN103855681B CN103855681B CN201210505405.1A CN201210505405A CN103855681B CN 103855681 B CN103855681 B CN 103855681B CN 201210505405 A CN201210505405 A CN 201210505405A CN 103855681 B CN103855681 B CN 103855681B
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Abstract
A kind of light fixture open loop protection circuit, the access power supply for disconnecting light fixture when light fixture is opened a way, including Voltage stabilizing module and switch module, it is characterised in that also including voltage detection module and control module；Wherein, the voltage detection module is used to detect the voltage in the circuit that the light fixture is constituted with the trigger, the control module is used to obtain the voltage of the voltage detection module detection, and controls the conducting of the switch module and disconnect according to the magnitude of voltage for obtaining；When the voltage detection module detects voltage, the control module controls the switch module conducting, and the AC power is powered to the light fixture；When the pressure drop detected in the voltage detection module is zero, the control module controls the switch module to disconnect, and the access power supply of the light fixture disconnects.Therefore, trigger is also without input power, it is impossible to triggering high pressure is sent to light fixture, so as to protect light fixture to damage or not damaged by high pressure under open-circuit condition.
Description
Technical field
The present invention relates to open loop protection circuit, more particularly to a kind of simple light fixture open loop protection circuit.
Background technology
Current many most of HID still in illumination fields（High-voltage gas discharging light）, HID light source is on startup
Need high pressure（4-5KV）Triggering can just be lighted.When light source is opened a way or is damaged, there is provided the trigger of high pressure can constantly send height
Pressure, can so influence light fixture safety and in reducing circuit electric elements life-span.
The content of the invention
Based on this, there is provided a kind of light fixture open loop protection circuit of the access power supply that light fixture is disconnected when light fixture is opened a way.
A kind of light fixture open loop protection circuit, the access power supply for disconnecting light fixture when light fixture is opened a way, including Voltage stabilizing module
And switch module, also including voltage detection module and control module；
The voltage detection module include for be connected with the zero line of AC power first input end, for trigger
Power input connection the second input and the output end that is connected with the test side of the control module；
The control module includes power input, earth terminal, test side and is connected with the input of the switch module
Output end；
The Voltage stabilizing module is parallel between the output end of the power input of the control module and the control module,
Common port after the Voltage stabilizing module is connected with the power input of the control module is used to be connected with positive source；It is described steady
Die block is used to be provided between the power input of the control module and the output end of the control module pressure drop of stabilization；
The switch module is also including for the output end being connected with the zero line of the AC power and for power supply just
The power input of pole connection；
Wherein, the voltage detection module is used to detect voltage in the circuit that the light fixture is constituted with the trigger,
The control module is used to obtain the voltage of the voltage detection module detection, and controls the switch according to the magnitude of voltage for obtaining
The conducting of module and disconnection；
When the voltage detection module detects voltage, the control module controls the switch module conducting, described
AC power is powered to the light fixture；When the pressure drop detected in the voltage detection module is zero, the control module control
The switch module disconnects, and the access power supply of the light fixture disconnects.
Wherein in one embodiment, the voltage detection module includes becoming electrical equipment T1 and diode D2；
The primary side for becoming electrical equipment T1 be series at the zero line of the AC power and the trigger power input it
Between, the Same Name of Ends of the secondary for becoming electrical equipment T1 be connected with the positive pole of the diode D2, the secondary of the change electrical equipment T1 it is another
One end is grounded；
The negative pole of the diode D2 is the output end of the voltage detection module；Become electrical equipment T1 primary sides two connect
Line end is respectively the first input end and the second input of the voltage detection module, wherein, near the AC power zero line
Terminals be the voltage detection module first input end, the terminals of power input near the trigger are institute
State the second input of voltage detection module.
Wherein in one embodiment, the voltage detection module also includes filter capacitor C2 and divider resistance R3；
One end of the filter capacitor C2 is connected with the negative pole of the diode D2, other end ground connection；
One end of the divider resistance R3 is connected with the negative pole of the diode D2, the inspection of the other end and the control module
Survey end connection.
Wherein in one embodiment, the control module includes triode Q1 and triode Q2；
The emitter stage of the emitter stage of the triode Q2 and the triode Q1 is grounded, the colelctor electrode of the triode Q2
Base stage with the triode Q1 is connected；
The base stage of the triode Q2 is the test side of the control module, the base stage of the triode Q1 and three pole
The common port of the colelctor electrode of pipe Q2 is the power input of the control module, the extremely described control of current collection of the triode Q1
The common port of the emitter stage of the output end of module, the emitter stage of the triode Q2 and the triode Q1 is the control module
Earth terminal.
Wherein in one embodiment, the control module also include current-limiting resistance R2, described current-limiting resistance R2 one end with
The base stage connection of the triode Q1, the other end is used to be connected with positive source.
Wherein in one embodiment, the Voltage stabilizing module includes voltage-regulator diode D1, and the voltage-regulator diode D1 is just
Pole is connected with the output end of the control module, the negative pole of the voltage-regulator diode D1 and the power input of the control module
Connection.
Wherein in one embodiment, the switch module includes relay K1, the electronic coil one of the relay K1
End is connected with the output end of the control module, and the other end of the relay K1 electronic coils is used to connect with the positive source
Connect, the normally closed switch of the relay K1 is series on the zero line of the AC power.
Wherein in one embodiment, also including electric capacity C1, the electric capacity C1 be parallel to the live wire of the alternating voltage with
Between zero line.
Above-mentioned light fixture open loop protection circuit detects the electricity in the circuit that light fixture is constituted with trigger by voltage detection module
Pressure.When voltage is detected, that is, light fixture normal work is illustrated, thus light fixture open loop protection circuit is not dynamic to AC power execution
Make.When the voltage in detecting the circuit that light fixture and trigger are constituted is zero, i.e., light fixture is damaged or in open-circuit condition, because
And, then controlling switch module disconnects the control module being connected with voltage detection module, that is, disconnect the access power supply of light fixture.Therefore,
Trigger is also without input power, it is impossible to triggering high pressure is sent to light fixture, so as to protect light fixture to damage or in open-circuit condition
Under do not damaged by high pressure.
Brief description of the drawings
Fig. 1 is the module map of light fixture open loop protection circuit；
Fig. 2 is the schematic diagram of light fixture open loop protection circuit.
Specific embodiment
As shown in figure 1, being the module map of light fixture open loop protection circuit.
A kind of light fixture open loop protection circuit, the access power supply for disconnecting light fixture when light fixture is opened a way, also examines including voltage
Survey module 101, control module 103, Voltage stabilizing module 105 and switch module 107.
The voltage detection module 101 include for be connected with the zero line of AC power first input end, for it is tactile
The output end sent out the second input of the power input connection of device and be connected with the test side of the control module 103.
The control module 103 includes power input, earth terminal, test side and the input with the switch module 107
Hold the output end of connection.
The Voltage stabilizing module 105 be parallel to the control module 103 power input and the control module 103 it is defeated
Go out between end, the common port after the Voltage stabilizing module 105 is connected with the power input of the control module 103 is used for and power supply
Positive pole is connected；The Voltage stabilizing module 105 is used for power input and the control module 103 in the control module 103
The pressure drop of stabilization is provided between output end.
The switch module 107 also include for the output end that is connected with the zero line of the AC power and for power supply
The power input of positive pole connection.
Wherein, the voltage detection module 101 is used to detect the electricity in the circuit that the light fixture is constituted with the trigger
Pressure, the control module 103 is used to obtain the voltage of the detection of the voltage detection module 101, and according to the magnitude of voltage control for obtaining
Make the conducting of the switch module 107 and disconnect.
When the voltage detection module 101 detects voltage, the control module 103 controls the switch module 107
Conducting, the AC power is powered to the light fixture；It is described when the pressure drop detected in the voltage detection module 101 is zero
Control module 103 controls the switch module 107 to disconnect, and the access power supply of the light fixture disconnects.
Voltage detection module 101 is used to detect the electric current that light fixture is constituted in circuit with trigger, actually in order to detect
Whether light fixture is in normal operating conditions.Usually, during light fixture normal work, voltage detection module 101 is able to detect that pressure drop,
And the pressure drop that will be detected is transferred to control module 103.Similarly, when light fixture is in open-circuit condition or damages, voltage detection module
101 pressure drops for detecting are zero, likewise, the pressure drop of detection is zero this signal transmission to control by voltage detection module 101
Module 103.
The test side of control module 103 is connected with the output end of voltage detection module 101, for receiving voltage detection module
The pressure drop information of 101 detections.Usually, when the pressure drop that control module 103 is received is not zero, the controlling switch mould of control module 103
Block 107 is turned on, light fixture now normal work.When the pressure drop that control module 103 is received is zero, the controlling switch mould of control module 103
Block 107 disconnects, and light fixture is now in open circuit or distress condition.
Voltage stabilizing module 105 is parallel between the power input of control module 103 and output end, for control module
103 pressure drops that stabilization is provided.
Switch module 107 controls itself conducting and disconnects according to the control signal of control module 103, so as to realize controlling lamp
Connection and disconnection between tool and AC power.
Incorporated by reference to Fig. 2.
Voltage detection module 101 includes becoming electrical equipment T1 and diode D2.The primary side for becoming electrical equipment T1 is series at the friendship
Flow between the zero line and the power input of the trigger of power supply, the Same Name of Ends of the secondary for becoming electrical equipment T1 and two pole
The positive pole connection of pipe D2, the other end ground connection of the secondary for becoming electrical equipment T1.
The negative pole of the diode D2 is the output end of the voltage detection module 101；It is described to become the two of electrical equipment T1 primary sides
Individual terminals are respectively the first input end and the second input of the voltage detection module 101, wherein, near the alternating current
The terminals of source zero line are the first input end of the voltage detection module 101, are close to the power input of the trigger
Terminals are the second input of the voltage detection module 101.
Voltage detection module 101 also includes filter capacitor C2 and divider resistance R3.
One end of the filter capacitor C2 is connected with the negative pole of the diode D2, other end ground connection.
One end of the divider resistance R3 is connected with the negative pole of the diode D2, the other end and the control module 103
Test side connection.
Control module 103 includes triode Q1 and triode Q2.The emitter stage of the triode Q2 and the triode Q1
Emitter stage be grounded, the colelctor electrode of the triode Q2 is connected with the base stage of the triode Q1.
The base stage of the triode Q2 is the test side of the control module 103, the base stage of the triode Q1 with it is described
The common port of the colelctor electrode of triode Q2 is the power input of the control module 103, and the current collection of the triode Q1 is extremely
The common port of the emitter stage of the output end of the control module 103, the emitter stage of the triode Q2 and the triode Q1 is
The earth terminal of the control module 103.
Control module 103 also includes current-limiting resistance R2, and described current-limiting resistance R2 one end connects with the base stage of the triode Q1
Connect, the other end is used to be connected with positive source.
Voltage stabilizing module 105 includes positive pole and the control module 103 of voltage-regulator diode D1, the voltage-regulator diode D1
Output end is connected, and the negative pole of the voltage-regulator diode D1 is connected with the power input of the control module 103.
Switch module 107 includes electronic coil one end and the control module 103 of relay K1, the relay K1
Output end is connected, and the other end of the relay K1 electronic coils is used to be connected with the positive source, the relay K1's
Normally closed switch is series on the zero line of the AC power.
Light fixture open loop protection circuit is also parallel to the live wire and zero line of the alternating voltage including electric capacity C1, the electric capacity C1
Between.
Based on above-mentioned all embodiments, the operation principle of light fixture open loop protection circuit is as follows：
In light fixture normal work, there is electric current to pass through in the primary side for becoming electrical equipment T1, thus it is right on the secondary for becoming electrical equipment T1
Pressure drop should be produced.After becoming the pressure drop on electrical equipment T1 secondary through diode D2 rectifications, then triode is passed to via current-limiting resistance R2
The base stage of Q2.After the base stage of triode Q2 receives high voltage, triode Q2 conductings.Thus, it is connected with triode Q2 colelctor electrodes
The base stage of triode Q1 be pulled to low level, triode Q1 cut-offs.The electronic coil of relay K1 must not be electric, relay K1's
Normally closed switch is remained closed, therefore, it is held between AC power and light fixture, light fixture normal work.
When light fixture is opened a way or is damaged, there is no electric current to pass through in the primary side for becoming electrical equipment T1, hence without the negative of diode D1
Extremely without voltage output.Similarly, the base stage of triode Q2 is low level, triode Q2 cut-offs.Triode Q2 is not to triode Q1
Effect.So the base stage of triode Q1 is connected equivalent to positive source, triode Q1 conductings.The relay being connected with triode Q1
The electronic coil of device K1 obtains electric, and the normally closed switch of relay K1 disconnects.Therefore, the plant-grid connection of light fixture is disconnected, so and lamp
The trigger for having connection does not have power input, and trigger no longer sends triggering high pressure to light fixture.
Above-mentioned light fixture open loop protection circuit is detected in the circuit that light fixture is constituted with trigger by voltage detection module 101
Voltage.When voltage is detected, that is, light fixture normal work is illustrated, thus light fixture open loop protection circuit is not dynamic to AC power execution
Make.When the voltage in detecting the circuit that light fixture and trigger are constituted is zero, i.e., light fixture is damaged or in open-circuit condition, because
And, then controlling switch module 107 disconnects the control module 103 being connected with voltage detection module 101, that is, disconnect the access electricity of light fixture
Source.Therefore, trigger is also without input power, it is impossible to triggering high pressure is sent to light fixture, so as to protect light fixture to damage or be in
Do not damaged by high pressure under open-circuit condition.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of light fixture open loop protection circuit, the access power supply for disconnecting light fixture when light fixture is opened a way, including Voltage stabilizing module and
Switch module, it is characterised in that also including voltage detection module and control module；
The voltage detection module is including the first input end for being connected with the zero line of AC power, for the electricity with trigger
Second input of source input connection and the output end being connected with the test side of the control module；
The control module includes power input, earth terminal, test side and defeated with what the input of the switch module was connected
Go out end；
The Voltage stabilizing module is parallel between the output end of the power input of the control module and the control module, described
Common port after Voltage stabilizing module is connected with the power input of the control module is used to be connected with positive source；The voltage stabilizing mould
Block is used to be provided between the power input of the control module and the output end of the control module pressure drop of stabilization；
The switch module with positive source also including for the output end being connected with the zero line of the AC power and for connecting
The power input for connecing；
Wherein, the voltage detection module is described for detecting the voltage in the circuit that the light fixture is constituted with the trigger
Control module is used to obtain the voltage of the voltage detection module detection, and controls the switch module according to the magnitude of voltage for obtaining
Conducting with disconnect；
When the voltage detection module detects voltage, the control module controls the switch module conducting, the exchange
Power supply is powered to the light fixture；When the pressure drop detected in the voltage detection module is zero, the control module control is described
Switch module disconnects, and the access power supply of the light fixture disconnects；
The control module includes triode Q1 and triode Q2；
The emitter stage of the emitter stage of the triode Q2 and the triode Q1 is grounded, the colelctor electrode of the triode Q2 and institute
State the base stage connection of triode Q1；
The base stage of the triode Q2 is the test side of the control module, the base stage of the triode Q1 and the triode Q2
Colelctor electrode common port be the control module power input, the extremely described control module of current collection of the triode Q1
Output end, the common port of the emitter stage of the emitter stage of the triode Q2 and the triode Q1 is connecing for the control module
Ground terminal；The control module also includes current-limiting resistance R2, and described current-limiting resistance R2 one end is connected with the base stage of the triode Q1,
The other end is used to be connected with positive source；
When light fixture is opened a way or is damaged, the base stage of the triode Q2 is low level, the triode Q2 cut-offs；The triode
Q2 is not acted on the triode Q1；The base stage of the triode Q1 is connected equivalent to positive source, and the triode Q1 leads
It is logical；The plant-grid connection that the switch module being connected with the triode Q1 has obtained light fixture electrically disconnected；
When light fixture normal work, the base stage of the triode Q1 being connected with triode Q2 colelctor electrodes is pulled to low level, triode
Q1 ends；The electronic coil of relay K1 must not be electric, and the normally closed switch of relay K1 is remained closed, between AC power and light fixture
It is held on.
2. light fixture open loop protection circuit according to claim 1, it is characterised in that the voltage detection module includes power transformation
Device T1 and diode D2；
The primary side for becoming electrical equipment T1 is series between the power input of the zero line of the AC power and the trigger, institute
The Same Name of Ends for stating the secondary for becoming electrical equipment T1 is connected with the positive pole of the diode D2, another termination of the secondary for becoming electrical equipment T1
Ground；
The negative pole of the diode D2 is the output end of the voltage detection module；Two terminals for becoming electrical equipment T1 primary sides
The first input end and the second input of respectively described voltage detection module, wherein, near connecing for the AC power zero line
Line end is the first input end of the voltage detection module, is the electricity near the terminals of the power input of the trigger
Press the second input of detection module.
3. light fixture open loop protection circuit according to claim 2, it is characterised in that the voltage detection module also includes filter
Ripple electric capacity C2 and divider resistance R3；
One end of the filter capacitor C2 is connected with the negative pole of the diode D2, other end ground connection；
One end of the divider resistance R3 is connected with the negative pole of the diode D2, the test side of the other end and the control module
Connection.
4. light fixture open loop protection circuit according to claim 1, it is characterised in that the Voltage stabilizing module includes the pole of voltage stabilizing two
Pipe D1, the positive pole of the voltage-regulator diode D1 is connected with the output end of the control module, the negative pole of the voltage-regulator diode D1
Power input with the control module is connected.
5. light fixture open loop protection circuit according to claim 1, it is characterised in that the switch module includes relay
K1, electronic coil one end of the relay K1 is connected with the output end of the control module, the relay K1 electronic coils
The other end be used for be connected with the positive source, the normally closed switch of the relay K1 is series at the zero line of the AC power
On.
6. light fixture open loop protection circuit according to claim 1, it is characterised in that also including electric capacity C1, the electric capacity C1
It is parallel between the live wire of the alternating voltage and zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505405.1A CN103855681B (en) | 2012-11-30 | 2012-11-30 | Light fixture open loop protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210505405.1A CN103855681B (en) | 2012-11-30 | 2012-11-30 | Light fixture open loop protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103855681A CN103855681A (en) | 2014-06-11 |
| CN103855681B true CN103855681B (en) | 2017-05-31 |
Family
ID=50863014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210505405.1A Active CN103855681B (en) | 2012-11-30 | 2012-11-30 | Light fixture open loop protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103855681B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066615B (en) * | 2018-09-05 | 2024-02-06 | 成都彩虹电器（集团）股份有限公司 | Broken wire protector for two-core power line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068744U (en) * | 1990-03-26 | 1991-01-02 | 陈守伟 | Electronic ballast with various kinds of protective circuit |
| CN101451693A (en) * | 2007-11-30 | 2009-06-10 | 深圳市海洋王投资发展有限公司 | Lamp protection method and device, and lamp using the protection arrangement |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001268784A (en) * | 2000-03-17 | 2001-09-28 | Alps Electric Co Ltd | Inverse connection preventing circuit of power source |
| CN2932912Y (en) * | 2006-01-23 | 2007-08-08 | 达方电子股份有限公司 | Light tube driving circuit |
| CN201805575U (en) * | 2010-05-27 | 2011-04-20 | 贵州航天风华精密设备有限公司 | Serial-parallel protective circuit of LED street lamp |
-
2012
- 2012-11-30 CN CN201210505405.1A patent/CN103855681B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2068744U (en) * | 1990-03-26 | 1991-01-02 | 陈守伟 | Electronic ballast with various kinds of protective circuit |
| CN101451693A (en) * | 2007-11-30 | 2009-06-10 | 深圳市海洋王投资发展有限公司 | Lamp protection method and device, and lamp using the protection arrangement |
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| Publication number | Publication date |
|---|---|
| CN103855681A (en) | 2014-06-11 |
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