CN105101537B - Silicon controlled rectifier voltage protects circuit and method, light adjusting circuit and lighting apparatus - Google Patents
Silicon controlled rectifier voltage protects circuit and method, light adjusting circuit and lighting apparatus Download PDFInfo
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- CN105101537B CN105101537B CN201510404110.9A CN201510404110A CN105101537B CN 105101537 B CN105101537 B CN 105101537B CN 201510404110 A CN201510404110 A CN 201510404110A CN 105101537 B CN105101537 B CN 105101537B
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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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
-
- 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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
-
- 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
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
-
- 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
- H05B47/20—Responsive to malfunctions or to light source life; for protection
-
- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The present invention provides a kind of silicon controlled rectifier voltage protection circuit and method, light adjusting circuit and lighting apparatus, and silicon controlled rectifier voltage protection circuit includes：Silicon controlled thyristor detecting circuit and protection circuit；The first end of silicon controlled thyristor detecting circuit is connected with controllable silicon regulator, and the second end of silicon controlled thyristor detecting circuit is with protecting the first end of circuit to be connected；The second end of protection circuit is connected with circuit for power conversion；Voltage sample point is provided with the connection circuit of silicon controlled thyristor detecting circuit and controllable silicon regulator；Silicon controlled thyristor detecting circuit is used in silicon-controlled access, detects the voltage of voltage sample point and is output to protection circuit；Circuit is protected to be used for the startup or closing for controlling circuit for power conversion according to the voltage of voltage sample point.By setting control silicon voltage protection circuit between controllable silicon regulator and circuit for power conversion, mutation voltage is detected, by the switch of logic control power converter, protection load and the silicon-controlled voltage damages that will not be mutated.
Description
Technical field
The present embodiments relate to circuit field, more particularly to a kind of silicon controlled rectifier voltage protection circuit and method, light modulation electricity
Road and lighting apparatus.
Background technology
Silicon-controlled is a kind of large power semiconductor device of the four-layer structure with three PN junctions, is also known as thyristor.Tool
There is the features such as small, structure is relatively easy, function is strong, be widely used in various electronic equipments and electronic product, use
To make controlled rectification, inversion, frequency conversion, pressure regulation, noncontacting switch etc..
Desk lamp with dimmer switch, speed-regulating fan, video camera in household electrical appliance etc. and many industrial control equipments have all largely used can
Control silicon device and carry out rectification and pressure regulation etc..By taking the desk lamp with dimmer switch in household electrical appliance as an example, since LED has, luminous efficiency is high, uses
The advantages that long lifespan, stability are good, desk lamp with dimmer switch generally use LED illumination lamp or LED backlight to be illuminated.User exists
During using LED illumination lamp or LED backlight, LED illumination circuit is directly often accessed into existing controllable silicon dimmer, it is silicon-controlled
After silicon-controlled device in light modulator carries out copped wave to alternating current, LED illumination lamp or LED backlight are directly inputted, is caused defeated
Enter electric current to become larger, cause LED illumination lamp or LED backlight even load to be destroyed.
The content of the invention
Silicon controlled rectifier voltage protection circuit and method, light adjusting circuit and lighting apparatus provided in an embodiment of the present invention, for solving
Certainly LED illumination circuit is directly accessed controllable silicon dimmer by user, causes the electric main after copped wave to directly input LED illumination
The problem of circuit, causes input current to become larger, breaking load.
First aspect present invention provides a kind of silicon controlled rectifier voltage protection circuit, including：Silicon controlled thyristor detecting circuit and protection electricity
Road；The first end of the silicon controlled thyristor detecting circuit is connected with voltage sample point；The voltage sample point is arranged on silicon-controlled adjusting
On the connection circuit of device and circuit for power conversion, the second end of the silicon controlled thyristor detecting circuit and the first end of the protection circuit
Connection；The second end of the protection circuit is connected with circuit for power conversion；
The silicon controlled thyristor detecting circuit is used in silicon-controlled access, detects the voltage of voltage sample point and is output to described
Protect circuit；The protection circuit be used for according to the voltage of the voltage sample point control the circuit for power conversion startup or
Close.
In one embodiment of this invention, the silicon controlled rectifier voltage protection circuit further includes：Rectification circuit, the rectified current
Road is connected between the voltage sample point and the controllable silicon regulator, for the controllable electric current for overregulating device output to be carried out
Rectification is output to the voltage sample point again.
In one embodiment of this invention, the silicon controlled thyristor detecting circuit includes：Mutation voltage detection circuit, Current Voltage
Conversion circuit and crest voltage sample circuit；The first end of the mutation voltage detection circuit is connected with the voltage detecting point,
The second end of the mutation voltage detection circuit is connected with the first end of the current-to-voltage converting circuit；The Current Voltage turns
The second end for changing circuit is connected with the first end of the crest voltage sample circuit；The second end of the crest voltage sample circuit
It is connected with the first end of the protection circuit；
The mutation voltage detection circuit is used in silicon-controlled access, detects the mutation voltage production of the voltage sample point
Raw current signal；The current-to-voltage converting circuit is used to the current signal that mutation voltage produces being converted to voltage signal,
And the voltage signal is output to the protection circuit by the crest voltage sample circuit.
In one embodiment of this invention, the protection circuit includes voltage sampling circuit and hysteresis comparator, the electricity
The first end of pressure sample circuit is connected with the second end of the crest voltage sample circuit, the second end of the voltage sampling circuit
It is connected with the first input end of the hysteresis comparator；Second input terminal of the hysteresis comparator is used for input reference voltage；
The output terminal of the hysteresis comparator is connected with the circuit for power conversion；The voltage sampling circuit is used for according to the peak value
The voltage signal of voltage sampling circuit output obtains output voltage, and the hysteresis comparator is used for the output voltage and reference
Voltage is compared；
If the hysteresis comparator, which compares the output voltage, is more than reference voltage, output low level closes the work(
Rate conversion circuit；If the hysteresis comparator, which compares the output voltage, is less than reference voltage, output high level starts institute
State circuit for power conversion.
In one embodiment of this invention, the mutation voltage detection circuit includes the first capacitance, for being connect silicon-controlled
It is fashionable, detect the current signal that the mutation voltage of the voltage sample point produces.
In one embodiment of this invention, the current-to-voltage converting circuit includes the first resistor and first being connected in parallel
Diode.
In one embodiment of this invention, the crest voltage sample circuit includes second resistance, the second capacitance and second
Diode；The second resistance and second capacitance are connected in parallel, the output terminal of second diode and the described second electricity
The one end for the circuit that resistance and second capacitance compose in parallel is connected in series；
The circuit that the input terminal of second diode is formed with the first resistor and first diodes in parallel
First end is connected in series；The first end of the circuit of the first resistor and first diodes in parallel composition is the described 1st
One end of pole pipe output.
Second aspect of the present invention provides a kind of silicon controlled rectifier voltage guard method, and circuit, institute are protected applied to silicon controlled rectifier voltage
Stating silicon controlled rectifier voltage protection circuit includes silicon controlled thyristor detecting circuit and protection circuit；The first end of the silicon controlled thyristor detecting circuit with
Voltage sample point connects；The voltage sample point is arranged on the connection circuit of controllable silicon regulator and circuit for power conversion, institute
The second end for stating silicon controlled thyristor detecting circuit is connected with the first end of the protection circuit；The second end and power of the protection circuit
Conversion circuit connects；The described method includes：
Silicon-controlled, voltage sample point is set between circuit for power conversion；
The silicon controlled thyristor detecting circuit obtains the voltage of the voltage sample point, and to the voltage of the voltage sample point into
The processing of row peak value；
It is described to protect circuit to the voltage of the voltage sample point after peak value processing compared with reference voltage, if peak
The voltage of the voltage sample point after value processing is more than reference voltage level, then controls circuit for power conversion to stop power conversion,
Otherwise the circuit for power conversion startup power is controlled to change.
Third aspect present invention provides a kind of light adjusting circuit, including：Power supply circuit, controllable silicon dimmer, power conversion electricity
Road and claim first aspect any one of them silicon controlled rectifier voltage protection circuit；The power supply circuit and the thyristor regulating
One end connection of device is saved, the other end of the controllable silicon dimmer protects one end and the institute of circuit with the silicon controlled rectifier voltage respectively
State the first input end connection of circuit for power conversion；The other end of the silicon controlled rectifier voltage protection circuit and power conversion electricity
The second input terminal connection on road；The controllable silicon dimmer includes silicon-controlled.
Fourth aspect present invention provides a kind of lighting apparatus, including：Light adjusting circuit described in the third aspect and with it is described
The illuminating device of light adjusting circuit connection.
Silicon controlled rectifier voltage protection circuit and method, light adjusting circuit and lighting apparatus provided by the invention, the silicon controlled rectifier voltage
Circuit is protected to include silicon controlled thyristor detecting circuit and protection circuit, the first end of silicon controlled thyristor detecting circuit is connected with voltage sample point；
The voltage sample point is arranged on the connection circuit of controllable silicon regulator and circuit for power conversion, and silicon controlled thyristor detecting circuit is can
When controlling silicon access, detect the voltage of voltage sample point and be output to protection circuit, protection circuit passes through according to the voltage sample
The voltage of point controls the startup or closing of the circuit for power conversion, and by silicon-controlled, connection can between circuit for power conversion
Silicon detection circuit and protection circuit are controlled, detects the mutation voltage at silicon-controlled place, and by protecting circuit to control circuit for power conversion
Switch, the latter linked load device of protection do not destroy by mutation voltage.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the principle schematic that silicon controlled rectifier voltage of the present invention protects circuit embodiments one；
Fig. 2 is the principle schematic that silicon controlled rectifier voltage of the present invention protects circuit embodiments two；
Fig. 3 is the principle schematic that silicon controlled rectifier voltage of the present invention protects circuit embodiments three；
Fig. 4 is the schematic diagram of 121 1 example of silicon controlled thyristor detecting circuit of the present invention；
Fig. 5 is the principle schematic of the embodiment of light adjusting circuit of the present invention；
Fig. 6 is the principle schematic of the embodiment of lighting apparatus of the present invention；
Fig. 7 is the flow chart of silicon controlled rectifier voltage guard method embodiment of the present invention；
Fig. 8 a are the principle schematic of silicon controlled rectifier voltage guard method application example one of the present invention；
Fig. 8 b are the voltage waveform detection figures of A points in Fig. 8 a；
Fig. 8 c are the principle schematic of silicon controlled rectifier voltage guard method application example two of the present invention；
Fig. 8 d are the voltage waveform detection figures of A points in Fig. 8 c.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without creative efforts, belong to the scope of protection of the invention.
Fig. 1 is the principle schematic that silicon controlled rectifier voltage of the present invention protects circuit embodiments one；As shown in Figure 1, the present invention carries
The silicon controlled rectifier voltage protection circuit 12 of confession includes：Silicon controlled thyristor detecting circuit 121 and protection circuit 122；The silicon-controlled detection electricity
The first end on road 121 is connected with voltage sample point A；The voltage sample point A is arranged on controllable silicon regulator and power conversion electricity
On the connection circuit on road, the second end of the silicon controlled thyristor detecting circuit 121 is connected with the first end of the protection circuit 122；Institute
The second end for stating protection circuit 122 is connected with circuit for power conversion；
The silicon controlled thyristor detecting circuit 121 is used in silicon-controlled access, and the voltage of detection voltage sample point A is simultaneously output to
The protection circuit 122；The protection circuit 122 is used to control the power to change according to the voltage of the voltage sample point A
The startup or closing of circuit.
In the present embodiment, controllable silicon regulator include it is silicon-controlled, after silicon-controlled access before, it is silicon-controlled directly with
Circuit for power conversion connects, and is directly connected to load after circuit for power conversion, such as the device such as LED illumination lamp.
The circuit for power conversion is used to carry out power conversion, can be DC power supply (English：Directcurrent, letter
Claim：DC the power module either AC power (English of DC) is turned：Alternating current, referred to as：AC the electricity of DC) is turned
Source module, such as various adapters or other circuit devices etc..It is silicon-controlled controllable using three terminal bidirectional in the embodiment of the present invention
Transwitch element (TRIAC, TRIode AC semiconductor switch, be also bidirectional thyristor), it is possible to understand that,
It can be other kinds of thyristor.The access silicon controlled rectifier voltage protection circuit 12 includes silicon controlled thyristor detecting circuit 121
With protection circuit 122, the silicon controlled thyristor detecting circuit 121 is arranged on described silicon-controlled between the circuit for power conversion, institute
Protection circuit 122 is stated to be connected between the silicon controlled thyristor detecting circuit 121 and the circuit for power conversion；Described silicon-controlled and institute
Circuit for power conversion connection is stated, the circuit for power conversion can be the device that flyback, normal shock etc. play power conversion.It is described can
Voltage sample point A is provided between control silicon and the circuit for power conversion, it is inevitable due to copped wave when silicon-controlled access
There is voltage jump point, circuit is protected by detecting the switch of this catastrophe point control circuit for power conversion.
Silicon controlled rectifier voltage provided in this embodiment protects circuit, and by silicon-controlled, connection can between circuit for power conversion
Silicon detection circuit and protection circuit are controlled, detects the mutation voltage at silicon-controlled place, and by protecting circuit to control circuit for power conversion
Switch, the latter linked load device of protection do not destroy by mutation voltage.
Fig. 2 be silicon controlled rectifier voltage of the present invention protection circuit embodiments two principle schematic, as described in Figure 2, in Fig. 2 can
Control silicon 11, power circuit 10 and circuit for power conversion 13 are not belonging to silicon controlled rectifier voltage protection circuit, in the base of above-described embodiment
On plinth, silicon controlled rectifier voltage protection circuit 12 further includes：Rectification circuit 123, the rectification circuit 123 are connected to the voltage and adopt
Between sampling point A and the controllable silicon regulator, it is described for the controllable electric current progress rectification for overregulating device output to be output to again
Voltage sample point.
Further, the silicon controlled thyristor detecting circuit 121 includes：Mutation voltage detection circuit 124, Current Voltage conversion electricity
Road 125 and crest voltage sample circuit 126；The first end of the mutation voltage detection circuit 124 connects with the voltage detecting point A
Connect, the second end of the mutation voltage detection circuit 124 is connected with the first end of the current-to-voltage converting circuit 125；It is described
The second end of current-to-voltage converting circuit 125 is connected with the first end of the crest voltage sample circuit 126；The crest voltage
The second end of sample circuit 126 is connected with the first end of the protection circuit 122；
The mutation voltage detection circuit 124 is used in silicon-controlled access, detects the mutation electricity of the voltage sample point A
Press the current signal produced；The current-to-voltage converting circuit 125 is used to the current signal that mutation voltage produces being converted to electricity
Signal is pressed, and the voltage signal is output to the protection circuit by the crest voltage sample circuit 126.
In the present embodiment, rectification circuit 123 is generally realized by rectifier bridge.With reference to figure 2, the present invention provides one kind
One embodiment of silicon controlled thyristor detecting circuit 121, silicon controlled thyristor detecting circuit 121 include mutation power sense circuit 124, electric current electricity
Voltage conversion circuit 125 and crest voltage sample circuit 126, are equipped between described silicon-controlled 11 and the circuit for power conversion 13
Voltage sample point A, the voltage of A points is sampled by the mutation voltage detection circuit 124, can be produced according to the voltage of mutation very big
Electric current principle, this current signal is changed into voltage signal by current-to-voltage converting circuit 125, then passes through peak again
126 output voltage signal Vctr1 of threshold voltage sample circuit extremely protects circuit 122.The protection circuit 122 is then controllable by detecting
The voltage signal Vctr1 that silicon detection circuit 121 inputs controls opening or closing for circuit for power conversion 13.
In the specific implementation, by taking rectifier bridge 123 (i.e. above-mentioned rectification circuit 123) as an example, described silicon-controlled 11 with the power
Rectifier bridge 123 is also associated between conversion circuit 13, allows the voltages of silicon-controlled 11 output to first pass through rectifier bridge 123, then allows A again
The voltage signal of point samples the voltage of A points by mutation voltage detection circuit 124 by mutation voltage detection circuit 124, according to
The voltage of mutation can produce the principle of very big electric current, and output current signal to current-to-voltage converting circuit 125, passes through electric current electricity
Voltage conversion circuit 125 is changed into voltage signal, then again by 126 output voltage signal Vctr1 of crest voltage sample circuit extremely
Protect circuit 122.The protection circuit 122 is then controlled by detecting the voltage signal Vctr1 of the input of silicon controlled thyristor detecting circuit 121
Circuit for power conversion 13 processed opens or closes.
Fig. 3 is the principle schematic that silicon controlled rectifier voltage of the present invention protects circuit embodiments three, as described in Figure 3, the work(in Fig. 3
Rate conversion circuit 13 is not belonging to silicon controlled rectifier voltage protection circuit, on the basis of any of the above-described embodiment, the protection circuit
122 include voltage sampling circuit 127 and hysteresis comparator 128, first end and the peak value electricity of the voltage sampling circuit 127
Press the second end connection of sample circuit 126, the of the second end of the voltage sampling circuit 127 and the hysteresis comparator 128
One input terminal connects；Second input terminal of the hysteresis comparator 128 is used for input reference voltage；The hysteresis comparator 128
Output terminal be connected with the circuit for power conversion；The voltage sampling circuit 127 is used to sample electricity according to the crest voltage
The voltage signal that road 126 exports obtains output voltage, and the hysteresis comparator 128 is used for the voltage sampling circuit 127
Output voltage is compared with reference voltage.
In the present embodiment, if the output voltage that compares the voltage sampling circuit 127 of the hysteresis comparator 128 is big
In reference voltage, then export low level and close the circuit for power conversion 13；If the hysteresis comparator 128 compares the electricity
The output voltage of pressure sample circuit 127 is less than reference voltage, then exports high level and start the circuit for power conversion 13.
In the specific implementation, the voltage sampling circuit 127 samples the voltage of Vctr1 and passes through certain ratio-metric output voltage
Value, compared with the reference voltage Vref 1 of hysteresis comparator 128, hysteresis comparator 128 is exported and controlled the magnitude of voltage according to comparative result
Signal Vctr2 processed is to the circuit for power conversion 13 and controls the circuit for power conversion 13, if the magnitude of voltage of sampling Vctr1 is big
Low level, which is then exported, in the reference voltage Vref 1 of hysteresis comparator 128 closes the circuit for power conversion 13；If sample Vctr1
Magnitude of voltage be less than the reference voltage Vref 1 of hysteresis comparator 128 and then export the high level opening circuit for power conversion 13.
Fig. 4 is the schematic diagram of 121 1 example of silicon controlled thyristor detecting circuit of the present invention, as shown in figure 4, in any of the above-described embodiment
On the basis of, the silicon controlled rectifier voltage protection circuit 12 in the specific implementation, the mutation voltage detection circuit 124 include first electricity
Hold C1, the current signal that the mutation voltage in silicon-controlled access, detecting the voltage sample point produces.The electric current electricity
Voltage conversion circuit 125 includes the first resistor R1 and the first diode D1 being connected in parallel.The crest voltage sample circuit 126 wraps
Include second resistance R2, the second capacitance C2 and the second diode D2；The second resistance R2 and the second capacitance C2 are connected in parallel,
One end of the output terminal of the second diode D2 and the second resistance R2 and the second capacitance C2 circuit composed in parallel
It is connected in series；What the input terminal of the second diode D2 was composed in parallel with the first resistor R1 and the first diode D1
The first end of circuit is connected in series；The first end for the circuit that the first resistor R1 and the first diode D1 are composed in parallel is
One end of the first diode D1 outputs.
Concrete implementation principle is, when user is directly LED illumination circuit inside controllable silicon dimmer access man, so meeting
Make the electric main input LED illumination circuit after copped wave, the voltage that can be produced after voltage is chopped into (A points).Voltage has
Mutation, A point control sources to mutation voltage detection circuit, mutation voltage detection circuit include the first capacitance C1.Stored up according to capacitance
ENERGY E=the 1/2CV for the electric field deposited2, here, C is the capacitance of capacitor C1, and V is the voltage on two pole plates of capacitor C1,
Both members just obtain time differentiation：DE/dt=(1/2) C × 2V (dv/dt)=CV (dv/dt)；Wherein, ENERGY E pair
The change rate of time t is exactly power P, P=dE/dt；And power P=Vi；So：I=C (dv/dt).That is the electricity being mutated
Pressure can produce very big electric current ib.Electric current ib passes through current-to-voltage converting circuit, and current-to-voltage converting circuit includes in parallel connect
First resistor R1, the first diode D1 connect, then inputs to crest voltage sample circuit, and crest voltage sample circuit is included simultaneously
The two or two pole for joining the second resistance R2 and the second capacitance C2 of connection and being connected in series with second resistance R2 and the second capacitance C2
Pipe D2, obtains an output voltage Vctr1, and output voltage signal Vctr1 is inputted to protection circuit 122, the protection electricity
Road 122 then controls opening or closing for circuit for power conversion 13 by voltage signal Vctr1.Therefore, can be by detecting voltage
The electric current ib of catastrophe point A realizes the protection of silicon-controlled access.
Silicon controlled rectifier voltage provided by the invention protects circuit, and the voltage of catastrophe point is detected based on voltage derivative detection technique,
By each module logic control planning, it can be achieved that the load of protecting circuit for power conversion to be followed by and silicon-controlled not being destroyed.
Fig. 5 is the principle schematic of the embodiment of light adjusting circuit of the present invention, as shown in figure 5, the light adjusting circuit includes：Power supply
Circuit 10, controllable silicon dimmer 11 (i.e. silicon-controlled 11), circuit for power conversion 13 and any silicon-controlled electricity of Fig. 1 to Fig. 4
Voltage protection circuit 12；The power supply circuit 10 is connected with one end of the controllable silicon regulator 11, the controllable silicon dimmer 11
The other end respectively with the silicon controlled rectifier voltage protection circuit 12 one end and the circuit for power conversion first input end connect
Connect；The other end of the silicon controlled rectifier voltage protection circuit 12 is connected with the second input terminal of the circuit for power conversion 13；It is described
Controllable silicon dimmer includes silicon-controlled.
The present embodiment provides it is a kind of with silicon controlled rectifier voltage protection circuit light adjusting circuit, circuit for power conversion 13 be used for into
Row power is changed, and can be that DC turns the power circuit either AC of DC and turns the power circuit of DC, for example, various adapters or other
Circuit device etc..The controllable silicon dimmer 11 including silicon-controlled, open by the silicon-controlled use triode ac switch in the present invention
Close element (TRIAC, TRIode AC semiconductor switch, be also bidirectional thyristor), it is possible to understand that, can also
It is other kinds of thyristor.Described silicon-controlled one end is connected with power supply circuit 10, the other end and circuit for power conversion
13 and silicon controlled rectifier voltage protection circuit 12 connect.
The access silicon controlled rectifier protecting circuit 12 is arranged between described silicon-controlled 11 and the circuit for power conversion 13, institute
State silicon-controlled 11 to be connected with the circuit for power conversion 13, the circuit for power conversion 13 can be that flyback, normal shock etc. play work(
The device of rate conversion.Voltage sample point A is provided between described silicon-controlled 11 and the circuit for power conversion 13, when silicon-controlled 11
During access, necessarily there is voltage jump point due to copped wave, circuit is protected by detecting this catastrophe point.Specific principle
Similar with technique effect with previous embodiment, details are not described herein.
Fig. 6 is the principle schematic of the embodiment of lighting apparatus of the present invention, as shown in fig. 6, the lighting apparatus includes：Fig. 5
Shown light adjusting circuit and the illuminating device 14 being connected with the light adjusting circuit.Specific principle and technique effect and foregoing reality
It is similar to apply example, details are not described herein.
Fig. 7 is the flow chart of silicon controlled rectifier voltage guard method embodiment of the present invention, as shown in fig. 7, the silicon controlled rectifier voltage is protected
Maintaining method, protects circuit, the silicon controlled rectifier voltage protects circuit bag applied to the silicon controlled rectifier voltage described in any of the above-described embodiment
Include silicon controlled thyristor detecting circuit and protection circuit；The first end of the silicon controlled thyristor detecting circuit is connected with voltage sample point；The electricity
Pressure sampled point is arranged on the connection circuit of controllable silicon regulator and circuit for power conversion, and the second of the silicon controlled thyristor detecting circuit
The first end with the protection circuit is held to be connected；The second end of the protection circuit is connected with circuit for power conversion；This method
Specific steps include：
S101：Silicon-controlled, voltage sample point is set between circuit for power conversion.
S102：The silicon controlled thyristor detecting circuit obtains the voltage of the voltage sample point, and to the voltage sample point
Voltage carries out peak value processing.
S103：The protection circuit compares the voltage of the voltage sample point after peak value processing with reference voltage
Compared with if the voltage of the voltage sample point after peak value processing is more than reference voltage level, control circuit for power conversion stops work(
Rate is changed, and otherwise controls the circuit for power conversion startup power to change.
Silicon controlled rectifier voltage guard method provided in this embodiment, applied to any silicon-controlled electricity therein of above-mentioned Fig. 1 to Fig. 6
Voltage protection circuit.Fig. 8 a are the principle schematic of silicon controlled rectifier voltage guard method application example one of the present invention, are carried as shown in Figure 8 a
A kind of example of silicon controlled thyristor detecting circuit 121 is supplied, silicon controlled thyristor detecting circuit 121 includes mutation power sense circuit 124, electric current
Voltage conversion circuit 125 and crest voltage sample circuit 126, set between described silicon-controlled 11 and the circuit for power conversion 13
There is voltage sample point A, the voltage of A points is sampled by the mutation voltage detection circuit 124, can be produced very according to the voltage of mutation
This current signal, is changed into voltage signal by current-to-voltage converting circuit 125, then passed through again by the principle of big electric current
126 output voltage signal Vctr1 of crest voltage sample circuit extremely protects circuit 122.The protection circuit 122 then can by detection
The voltage signal Vctr1 of 121 input of control silicon detection circuit controls opening or closing for circuit for power conversion 13.Fig. 8 b are Fig. 8 a
The voltage waveform detection figure of middle A points, transverse axis represent time t, and the longitudinal axis represents magnitude of voltage V.
Fig. 8 c are the principle schematic of silicon controlled rectifier voltage guard method application example two of the present invention, with reference to figure 8c, are used as this
Another embodiment of invention silicon controlled thyristor detecting circuit 121, is also connected between described silicon-controlled 11 and the circuit for power conversion 13
There is rectifier bridge 123, allow the voltage of silicon-controlled 11 output to first pass through rectifier bridge 123, then allow the voltage signal of A points to pass through mutation again
Voltage detecting circuit 124, the voltage of A points is sampled by mutation voltage detection circuit 124, can be produced according to the voltage of mutation very big
Electric current principle, output current signal to current-to-voltage converting circuit 125, is changed into by current-to-voltage converting circuit 125
Voltage signal, then passes through 126 output voltage signal Vctr1 of crest voltage sample circuit to protection circuit 122 again.The protection
Circuit 122 then controls beating for circuit for power conversion 13 by detecting the voltage signal Vctr1 of the input of silicon controlled thyristor detecting circuit 121
On or off is closed.Fig. 8 d are the voltage waveform detection figures of A points in Fig. 8 c, and transverse axis represents time t, and the longitudinal axis represents magnitude of voltage V.
Silicon controlled rectifier voltage guard method provided in this embodiment, is protected in circuit, base applied to above-mentioned silicon controlled rectifier voltage
In the voltage of voltage derivative detection technique detection catastrophe point, by each module logic control planning, it can be achieved that protection power conversion
Load that circuit is followed by and it is silicon-controlled be not destroyed, specific principle is similar with previous embodiment, and details are not described herein.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution described in foregoing embodiments, either to which part or all technical characteristic into
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (9)
1. a kind of silicon controlled rectifier voltage protects circuit, it is characterised in that including：Silicon controlled thyristor detecting circuit and protection circuit；It is described can
The first end of control silicon detection circuit is connected with voltage sample point；The voltage sample point is arranged on controllable silicon regulator and turns with power
Change on the connection circuit of circuit, the second end of the silicon controlled thyristor detecting circuit is connected with the first end of the protection circuit；It is described
The second end of protection circuit is connected with circuit for power conversion；
The silicon controlled thyristor detecting circuit is used in silicon-controlled access, detects the voltage of voltage sample point and is output to the protection
Circuit；The protection circuit is used for startup or the pass that the circuit for power conversion is controlled according to the voltage of the voltage sample point
Close；
The silicon controlled thyristor detecting circuit includes mutation voltage detection circuit, current-to-voltage converting circuit and crest voltage sampling electricity
Road；The first end of the mutation voltage detection circuit is connected with the voltage sample point, and the of the mutation voltage detection circuit
Two ends are connected with the first end of the current-to-voltage converting circuit；The second end of the current-to-voltage converting circuit and the peak value
The first end connection of voltage sampling circuit；The second end of the crest voltage sample circuit and the first end of the protection circuit connect
Connect；
The mutation voltage detection circuit is used in silicon-controlled access, detects the mutation voltage generation of the voltage sample point
Current signal；The current-to-voltage converting circuit is used to the current signal that mutation voltage produces being converted to voltage signal, and will
The voltage signal is output to the protection circuit by the crest voltage sample circuit.
2. silicon controlled rectifier voltage according to claim 1 protects circuit, it is characterised in that the silicon controlled rectifier voltage protects circuit
Further include：Rectification circuit, the rectification circuit are connected between the voltage sample point and the controllable silicon regulator, for inciting somebody to action
The electric current of controllable silicon regulator output carries out rectification and is output to the voltage sample point again.
3. silicon controlled rectifier voltage according to claim 1 protects circuit, it is characterised in that the protection circuit is adopted including voltage
Sample circuit and hysteresis comparator, the first end of the voltage sampling circuit and the second end of the crest voltage sample circuit connect
Connect, the second end of the voltage sampling circuit is connected with the first input end of the hysteresis comparator；The hysteresis comparator
Second input terminal is used for input reference voltage；The output terminal of the hysteresis comparator is connected with the circuit for power conversion；It is described
The voltage signal that voltage sampling circuit is used to be exported according to the crest voltage sample circuit obtains output voltage, the sluggishness ratio
It is used for compared with device by the output voltage compared with reference voltage；
If the hysteresis comparator, which compares the output voltage, is more than reference voltage, output low level is closed the power and is turned
Change circuit；If the hysteresis comparator, which compares the output voltage, is less than reference voltage, output high level starts the work(
Rate conversion circuit.
4. silicon controlled rectifier voltage according to claim 1 protects circuit, it is characterised in that the mutation voltage detection circuit bag
The first capacitance is included, the current signal that the mutation voltage in silicon-controlled access, detecting the voltage sample point produces.
5. silicon controlled rectifier voltage according to claim 1 protects circuit, it is characterised in that the current-to-voltage converting circuit bag
Include the first resistor being connected in parallel and the first diode.
6. silicon controlled rectifier voltage according to claim 5 protects circuit, it is characterised in that the crest voltage sample circuit bag
Include second resistance, the second capacitance and the second diode；The second resistance and second capacitance are connected in parallel, and the described 2nd 2
The one end for the circuit that the output terminal of pole pipe is composed in parallel with the second resistance and second capacitance is connected in series；
The first of the circuit that the input terminal of second diode is formed with the first resistor and first diodes in parallel
End is connected in series；The first end of the circuit of the first resistor and first diodes in parallel composition is first diode
One end of output.
7. a kind of silicon controlled rectifier voltage guard method, it is characterised in that protect circuit, the silicon-controlled electricity applied to silicon controlled rectifier voltage
Voltage protection circuit includes silicon controlled thyristor detecting circuit and protection circuit；The first end of the silicon controlled thyristor detecting circuit and voltage sample point
Connection；The voltage sample point is arranged on the connection circuit of controllable silicon regulator and circuit for power conversion, the silicon-controlled inspection
The second end of slowdown monitoring circuit is connected with the first end of the protection circuit；The second end of the protection circuit connects with circuit for power conversion
Connect；The silicon controlled thyristor detecting circuit includes mutation voltage detection circuit, current-to-voltage converting circuit and crest voltage sample circuit；
The first end of the mutation voltage detection circuit is connected with the voltage sample point, the second end of the mutation voltage detection circuit
It is connected with the first end of the current-to-voltage converting circuit；The second end of the current-to-voltage converting circuit and the crest voltage
The first end connection of sample circuit；The second end of the crest voltage sample circuit is connected with the first end of the protection circuit；
The described method includes：
Silicon-controlled, voltage sample point is set between circuit for power conversion；
The mutation voltage detection circuit detects the current signal that the mutation voltage of the voltage sample point produces, the electric current electricity
The current signal is converted to voltage signal by voltage conversion circuit, and the crest voltage sample circuit handles the voltage signal
After be output to the protection circuit；
It is described to protect circuit to the voltage after crest voltage sample circuit processing compared with reference voltage, if peak value is electric
The voltage of the voltage sample point after pressure sample circuit processing is more than reference voltage level, then controls circuit for power conversion to stop work(
Rate is changed, and otherwise controls the circuit for power conversion startup power to change.
A kind of 8. light adjusting circuit, it is characterised in that including：Power supply circuit, controllable silicon dimmer, circuit for power conversion and right will
1 to 6 any one of them silicon controlled rectifier voltage is asked to protect circuit；One end of the power supply circuit and the controllable silicon regulator connects
Connect, the other end of the controllable silicon dimmer is electric with one end of silicon controlled rectifier voltage protection circuit and power conversion respectively
The first input end connection on road；The other end of the silicon controlled rectifier voltage protection circuit and the second input of the circuit for power conversion
End connection；The controllable silicon dimmer includes silicon-controlled.
A kind of 9. lighting apparatus, it is characterised in that including：Light adjusting circuit described in claim 8 and with the light adjusting circuit
The illuminating device of connection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510404110.9A CN105101537B (en) | 2015-07-08 | 2015-07-08 | Silicon controlled rectifier voltage protects circuit and method, light adjusting circuit and lighting apparatus |
| PCT/CN2016/089496 WO2017005219A1 (en) | 2015-07-08 | 2016-07-08 | Silicon controlled rectifier voltage-protection circuit and method thereof, dimming circuit, and lighting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510404110.9A CN105101537B (en) | 2015-07-08 | 2015-07-08 | Silicon controlled rectifier voltage protects circuit and method, light adjusting circuit and lighting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105101537A CN105101537A (en) | 2015-11-25 |
| CN105101537B true CN105101537B (en) | 2018-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510404110.9A Active CN105101537B (en) | 2015-07-08 | 2015-07-08 | Silicon controlled rectifier voltage protects circuit and method, light adjusting circuit and lighting apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105101537B (en) |
| WO (1) | WO2017005219A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101537B (en) * | 2015-07-08 | 2018-04-24 | 浙江生辉照明有限公司 | Silicon controlled rectifier voltage protects circuit and method, light adjusting circuit and lighting apparatus |
| CN108990199B (en) * | 2018-05-25 | 2021-08-06 | 矽力杰半导体技术(杭州)有限公司 | Detection circuit and method for silicon controlled rectifier dimmer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2671232Y (en) * | 2003-06-29 | 2005-01-12 | 浙江中雁电信设备有限公司 | Bidirectional controllable thysitor overcurrent protector |
| CN201315479Y (en) * | 2008-11-17 | 2009-09-23 | 河北实华科技有限公司 | Pulse by pulse overcurrent shutoff protective circuit |
| CN203378105U (en) * | 2013-07-19 | 2014-01-01 | 深圳市瑞旺光电科技有限公司 | Low ripple chopper circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006319172A (en) * | 2005-05-13 | 2006-11-24 | Wako Denken Kk | Adapter device for light control of led lamp |
| JP5331154B2 (en) * | 2011-04-27 | 2013-10-30 | シャープ株式会社 | LED driving circuit and LED illumination lamp |
| CN202495757U (en) * | 2012-02-03 | 2012-10-17 | 英飞特电子（杭州）股份有限公司 | Impulse current limiting circuit and corresponding chopping dimming system thereof |
| CN103889123B (en) * | 2014-03-27 | 2016-03-23 | 深圳市明微电子股份有限公司 | A kind of LED light adjusting circuit and LED lamp |
| CN204190978U (en) * | 2014-09-19 | 2015-03-04 | 英飞特电子（杭州）股份有限公司 | A kind of controllable silicon maintains current compensation circuit |
| CN105101537B (en) * | 2015-07-08 | 2018-04-24 | 浙江生辉照明有限公司 | Silicon controlled rectifier voltage protects circuit and method, light adjusting circuit and lighting apparatus |
| CN204906777U (en) * | 2015-07-08 | 2015-12-23 | 浙江生辉照明有限公司 | Silicon controlled rectifier voltage protection circuit, Dimmer circuit and lighting apparatus |
-
2015
- 2015-07-08 CN CN201510404110.9A patent/CN105101537B/en active Active
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2016
- 2016-07-08 WO PCT/CN2016/089496 patent/WO2017005219A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2671232Y (en) * | 2003-06-29 | 2005-01-12 | 浙江中雁电信设备有限公司 | Bidirectional controllable thysitor overcurrent protector |
| CN201315479Y (en) * | 2008-11-17 | 2009-09-23 | 河北实华科技有限公司 | Pulse by pulse overcurrent shutoff protective circuit |
| CN203378105U (en) * | 2013-07-19 | 2014-01-01 | 深圳市瑞旺光电科技有限公司 | Low ripple chopper circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105101537A (en) | 2015-11-25 |
| WO2017005219A1 (en) | 2017-01-12 |
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Denomination of invention: Silicon-controlled voltage protection circuit and method, dimming circuit and lighting equipment Effective date of registration: 20191123 Granted publication date: 20180424 Pledgee: China CITIC Bank Co.,Ltd. Jiaxing Tongxiang sub branch Pledgor: ZHEJIANG SHENGHUI LIGHTING Co.,Ltd. Registration number: Y2019330000238 |
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Date of cancellation: 20230208 Granted publication date: 20180424 Pledgee: China CITIC Bank Co.,Ltd. Jiaxing Tongxiang sub branch Pledgor: ZHEJIANG SHENGHUI LIGHTING Co.,Ltd. Registration number: Y2019330000238 |
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Denomination of invention: Thyristor voltage protection circuit and method, dimming circuit and lighting equipment Effective date of registration: 20230210 Granted publication date: 20180424 Pledgee: China CITIC Bank Co.,Ltd. Jiaxing Tongxiang sub branch Pledgor: ZHEJIANG SHENGHUI LIGHTING Co.,Ltd. Registration number: Y2023330000340 |