CN104184205A - Power switching circuit and lighting equipment - Google Patents
Power switching circuit and lighting equipment Download PDFInfo
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- CN104184205A CN104184205A CN201310196904.1A CN201310196904A CN104184205A CN 104184205 A CN104184205 A CN 104184205A CN 201310196904 A CN201310196904 A CN 201310196904A CN 104184205 A CN104184205 A CN 104184205A
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- 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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention is applicable to the field of switching power supplies, and provides a power switching circuit, which is connected with an output end of an electromagnetic compatible circuit, a battery and a lamp. The input end of the electromagnetic compatible circuit is connected with an AC power supply; the output end of the electromagnetic compatible circuit is connected with a charging circuit charging the battery; and the power switching circuit comprises a relay, a first drive module, a second drive module, a switching power module and a voltage comparison module. In the condition in which no comparison voltage is outputted and power of the battery is adequate of the voltage comparison module according to the first drive module, the switching power module is started through conducting the second drive module to convert the battery voltage to timely provide a temporary power supply for the lamp out of power for lighting, and in the condition in which the first drive module has comparison voltage output and/or in the condition of under voltage of the battery, the switching power module is closed through cutting off the second drive module to stop the power of a consumed battery.
Description
Technical field
The invention belongs to field of switch power, relate in particular to a kind of power supply switch circuit and lighting apparatus.
Background technology
At present, illumination become the part that people are indispensable, in megastore, enterprise almost daytime with evening light source be all light yellow, if there is emergency case, when power-off or breaking out of fire, civil power is cut off, and just cannot give light source.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of power supply switch circuit, is intended to solve the problem that light source can not be provided after the power cut-off of illuminator in time.
The embodiment of the present invention is to realize like this, a kind of power supply switch circuit, be connected with output, battery and the light fixture of electromagnetic compatibility circuit, the input incoming transport power supply of described electromagnetic compatibility circuit, the output of described electromagnetic compatibility circuit is connected with the charging circuit charging for described battery, described power supply switch circuit comprises relay, the first driver module, the second driver module, switch power module, voltage comparison module, wherein
The normally opened contact of described relay is connected with the output of described electromagnetic compatibility circuit, moving contact is connected with the input of described light fixture, normally-closed contact is connected with the output of described switch power module;
The input of described the first driver module is connected with the output of described electromagnetic compatibility circuit, control end is connected with the coil of described relay, output is connected with the first test side of described voltage comparison module, in the time that described AC power has Voltage-output, described the first driver module receives relay work described in the voltage control of described electromagnetic compatibility circuit output, and at its output output comparative voltage;
The input of described the second driver module is connected with accessory power supply, controlled end is connected with the drive end of described voltage comparison module, output is connected with the power end of described switch power module;
The input of described switch power module is connected with described battery, after the voltage transformation that described switch power module is exported described battery in the time of described AC power power-off, exports at its output;
The second test side of described voltage comparison module is connected with described battery, when the output of described the first driver module has comparative voltage output and/or during at described battery undervoltage, described voltage comparison module makes described the second driver module cut-off in its drive end output cut-off control signal; When the output of described the first driver module is incomparably compared with Voltage-output and described cell voltage when normal, described voltage comparison module makes described the second driver module conducting in its drive end output conducting control signal.
Another object of the embodiment of the present invention is to provide a kind of lighting device, comprise light fixture and the electromagnetic compatibility circuit, charging circuit, the battery that connect successively, described light fixture is connected with AC power through described electromagnetic compatibility circuit, also comprises above-mentioned power supply switch circuit.
Above-mentioned power supply switch circuit by described voltage comparison module according to the first driver module incomparably compared with in the situation of Voltage-output battery electric quantity abundance, to provide in time temporary source with illumination can to after cell voltage conversion the light fixture after power-off by conducting the second driver module with starting switch power module, and the first driver module have comparative voltage output and/battery undervoltage in the situation that, by turn-off the second driver module with closing switch power module to stop the electric weight of consuming cells, solved the problem that light source can not be provided after the power cut-off of illuminator in time.
Brief description of the drawings
Fig. 1 is the module map of the power supply switch circuit that provides of the embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of the voltage comparison module that provides of the embodiment of the present invention;
Fig. 3 is the circuit theory diagrams of the second driver module of providing of the embodiment of the present invention;
Fig. 4 is the electromagnetic compatibility circuit that provides of the embodiment of the present invention and the circuit theory diagrams of the first driver module;
Fig. 5 is the circuit theory diagrams of the switch power module that provides of the embodiment of the present invention.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, show the module map of the power supply switch circuit that a preferred embodiment provides, for convenience of description, only show the part relevant to the present embodiment.
In conjunction with Fig. 1 to Fig. 5, output, battery 300 and the light fixture 400 of power supply switch circuit 100 electromagnetic compatibility circuit 200 connect, the input incoming transport power supply 500 of electromagnetic compatibility circuit 200, the output of electromagnetic compatibility circuit 200 is connected with the charging circuit 600 charging for battery 300, and power supply switch circuit 100 comprises relay K 1, voltage comparison module 110, the second driver module 120, the first driver module 130, switch power module 140.
The normally opened contact of relay K 1 is connected with the output of electromagnetic compatibility circuit 200, and the moving contact of relay K 1 is connected with the input of light fixture 400, the normally-closed contact of relay K 1 with the output OUT(of switch power module 140 with reference to Figure 4 and 5) be connected.
The input of the first driver module 130 is connected with the output of electromagnetic compatibility circuit 200, the control end of the first driver module 130 is connected with the coil of relay K 1, the output B(of the first driver module 130 is with reference to figure 4) be connected with the first test side B ' (with reference to figure 2) of voltage comparison module 110, in the time that AC power 500 has Voltage-output, the first driver module 130 receives the voltage control relay K 1 that electromagnetic compatibility circuit 200 exports and works, and at its output B output comparative voltage.
The input of the second driver module 120 is connected with accessory power supply VCC, the controlled end C(of the second driver module 120 is with reference to figure 2) be connected with the drive end C ' (with reference to figure 3) of voltage comparison module 110, the output D(of the second driver module 120 is with reference to figure 3) be connected with the power end D ' (with reference to figure 5) of switch power module 140;
The input of switch power module 140 is connected with battery 300, after the voltage transformation that switch power module 140 is exported battery 300 in the time of AC power 500 power-off, exports at its output OUT.
The second test side E(of voltage comparison module 110 is with reference to figure 2, shown in the 6th pin of chip with the second pin be all) be connected with battery 300, when the output B of the first driver module 130 has comparative voltage output and/or in the time that battery 300 is under-voltage, voltage comparison module 110 ends the second driver module 120 in its drive end C ' output cut-off control signal; When the output B of the first driver module 130 is incomparably compared with Voltage-output and battery 300 voltages when normal, voltage comparison module 110 makes the second driver module 120 conductings in its drive end C ' output conducting control signal.
Above-mentioned power supply switch circuit 100 is incomparable with in the situation of Voltage-output battery 300 electric weight abundances according to the first driver module 130 by voltage comparison module 110, to provide in time temporary source with illumination can to after battery 300 voltage transformations the light fixture 400 after power-off by conducting the second driver module 120 with starting switch power module 140, and the first driver module 130 have comparative voltage output and/battery 300 is under-voltage in the situation that, by turn-off the second driver module 120 with closing switch power module 140 to stop the electric weight of consuming cells 300.
With reference to figure 1,2, in a preferred embodiment, voltage comparison module 110 comprises comparable chip U1, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 1, capacitor C 2, diode D1, positive-negative-positive triode Q1 and diode D2.
The comparator chip that the preferred model of comparable chip U1 is LM393, the first in-phase input end 3 of comparable chip is connected with the output B of the first driver module 130 as the first test side B ' of voltage comparison module 110, and the first inverting input 3 of comparable chip U1 and the second inverting input 6 are electrically connected with battery 300 as the second test side E of voltage comparison module 110.Particularly, the first inverting input 3 of comparable chip U1 and the second inverting input 6 be through the positive pole of a resistance and battery 300, and be connected the plus earth of this voltage stabilizing didoe with the negative electrode of a voltage stabilizing didoe.
The first output 1 of comparable chip U1 is connected with the base stage of triode Q1 through resistance R 1, the base stage of triode Q1 is also connected with accessory power supply VCC through resistance R 2, the emitter of triode Q1 is connected with accessory power supply VCC through resistance R 3, the collector electrode of triode Q1 is the anodic bonding with diode D1 through resistance R 4, and the negative electrode of diode D1 is connected with the second in-phase input end 5 of comparable chip U1.
After capacitor C 1 is in parallel with resistance R 4 through resistance R 5 ground connection, capacitor C 1 and with the anodic bonding of diode D2, the negative electrode of diode D2 is connected with the second output of comparable chip U1 through resistance R 6, and the second output 7 of comparable chip U1 is connected with the controlled end C of the second driver module 120 as the drive end C ' of voltage comparison module 110; Earth terminal 4 ground connection of comparable chip U1, the power end of comparable chip U1 are connected with accessory power supply VCC and through capacitor C 2 ground connection.
With reference to figure 1～3, in a preferred embodiment, the second driver module 120 comprises positive-negative-positive triode Q2 and Q3, resistance R 7, resistance R 8 and resistance R 9.
The base stage of triode Q2 is connected with the drive end C ' of voltage comparison module 110 through resistance R 7 as the controlled end C of the second driver module 120, and the base stage of triode Q2 is connected with accessory power supply VCC through resistance R 8, the emitter of triode Q1 is connected with accessory power supply VCC.
The collector electrode of triode Q2 is connected with the base stage of triode Q3, the collector electrode of triode Q2 through resistance R 9 ground connection, the emitter of triode Q3 is connected with accessory power supply VCC, the collector electrode of triode Q3 is connected as the output D of the second driver module 120 and the power end D ' of switch power module 140.
Known, in the time that the base stage of triode Q2 receives low level, the second driver module 120 conductings, the power end D ' of switch power module 140 can obtain work starting resistor, after can converting the voltage of battery 300, outputs in light fixture 400; In the time that the base stage of triode Q2 receives high level, the second driver module 120 ends, and the power end D ' of switch power module 140, without work starting resistor, can not convert the voltage of battery 300.
With reference to figure 1 and Fig. 4, the output of electromagnetic compatibility circuit 200 comprises the first output and the second output, and the first driver module 130 comprises the first current limliting unit 131, the second current limliting unit 132, absorbing circuit 133, photoelectrical coupler U2, partial pressure unit 134 and driver element 135.
The first input end of photoelectrical coupler U2 is connected with the first output of electromagnetic compatibility circuit 200 through the first current limliting unit 131, and the second input of photoelectrical coupler U2 is connected with the second output of electromagnetic compatibility circuit 200 through the second current limliting unit 132; Absorbing short circuit is connected between the first input end and the second input of photoelectrical coupler U2.
The first output access accessory power supply VCC of photoelectrical coupler U2 and the first output of photoelectrical coupler U2 are connected with the power end of driver element 135, the second output of photoelectrical coupler U2 is through partial pressure unit 134 ground connection, and the second output of photoelectrical coupler U2 is connected with the control end of driver element 135, the first drive end of driver element 135 is as the control end A of the first driver module 130, and the second drive end of driver element 135 is as the output B of the first driver module 130.
In the present embodiment, in the time that AC power 500 has normal voltage output, the light emitting source work of photoelectrical coupler U2, light-receiving device is also worked, driver element 135 is also worked, the coil of driving relay K 1 obtains electric adhesive armature two moving contact and two normally opened contacts is joined, light fixture 400 can connect AC power 500 and work, and there is comparative voltage output at second drive end (the output B of the first driver module 130) of driver element 135, make so drive end C ' the output high level of voltage comparison module 110; And in the time that AC power 500 does not have normal voltage output, driver element 135 is not worked, relay K 1 attonity, now at the second drive end of driver element 135 incomparably compared with Voltage-output, make so the drive end C ' output low level of voltage comparison module 110, the second driver element 135 conductings, switch power module 140 is worked, for light fixture 400 provides odd-job power supply.
In a preferred embodiment, the first current limliting unit 131 comprises that current-limiting resistance R10, resistance R 11, resistance R 13 and resistance R 13, the second current limliting unit 132 comprise current-limiting resistance R14, resistance R 15, resistance R 16 and resistance R 17.
Current-limiting resistance R10 is connected with the first input end of photoelectrical coupler U2 with the first output that is connected to electromagnetic compatibility circuit 200 after current-limiting resistance R11 series connection, current-limiting resistance R12 is connected with the first input end of photoelectrical coupler U2 with the first output that is connected to electromagnetic compatibility circuit 200 after current-limiting resistance R13 series connection, and current-limiting resistance R10 is connected with the node of current-limiting resistance R13 series connection with current-limiting resistance R12 with the node of current-limiting resistance R11 series connection.
Current-limiting resistance R14 is connected to the second output of electromagnetic compatibility circuit 200 after connecting with current-limiting resistance R15 and the second input of photoelectrical coupler U2 is connected, current-limiting resistance R16 is connected to the second output of electromagnetic compatibility circuit 200 after connecting with current-limiting resistance R17 and the second input of photoelectrical coupler U2 is connected, and current-limiting resistance R14 is connected with the node of current-limiting resistance R17 series connection with current-limiting resistance R16 with the node of current-limiting resistance R15 series connection.
In a preferred embodiment, absorbing circuit 133 comprises diode D3 and resistance R 18, and anode, the negative electrode of diode D3 are connected with the second input, the first input end of light end coupler respectively, and resistance R 18 is in parallel with diode D3.What export due to electromagnetic compatibility circuit 200 is alternating voltage, and the light emitting source of photoelectrical coupler U2 (light-emitting diode) can only consume the wherein phase voltage in alternating voltage, and a so other phase voltage is to utilize absorbing circuit 133 to absorb.
In a preferred embodiment, driver element 135 comprises NPN type triode Q4, positive-negative-positive triode Q5, NPN type triode Q6 and diode D4.
The base stage of triode Q4 and Q5 is all connected with the second output of photoelectrical coupler U2, and the collector electrode of triode Q4 is connected with accessory power supply VCC, and the emitter of triode Q4 is connected with the emitter of triode Q5, the grounded collector of triode Q5.
The emitter of triode Q4 is connected with the base stage of triode Q6 through a resistance R 19, and the emitter of triode Q4 is connected with the negative electrode of diode D4, the anode of diode D4 is as the output B of the first driver module 130 and through capacitor C 3 ground connection, diode D4 is in parallel with a resistance R 20, and its negative electrode is through capacitor C 4 ground connection.
The base stage of triode Q6 is also connected as the control end A of the first driver module 130 and coil one end of relay K 1 through resistance R 21 ground connection, grounded emitter, collector electrode, and the other end of coil is connected with accessory power supply VCC.
In a preferred embodiment, with reference to figure 1 and Fig. 5, switch power module 140 comprises PWM(Pulse Width Modulation, pulse-width modulation) chip U3, transformer T1, two drive sub-circuits 142, N-type metal-oxide-semiconductor T1 and T2, diode D5, diode D6, diode D7 and diode D8.
The primary coil N1 of transformer T1 comprises first input end a, the second input b and the 3rd input c between this first input end a and the second input b, the first input end a of transformer T1 is connected with metal-oxide-semiconductor T1 drain electrode, the second input b of transformer T1 is connected with metal-oxide-semiconductor T2 drain electrode, and the 3rd input c of transformer T1 is connected with battery 300 is anodal.
The secondary coil N2 of transformer T1 comprises the first output d, the second output e and the 3rd Ausgang between this first output d and the second output e, the first output d of transformer T1 and the anodic bonding of the diode D5 being connected in series, diode D6, the second output e of transformer T1 and the anodic bonding of the diode D7 being connected in series, diode D8, the negative electrode of diode D6 and diode D8 is as the output OUT of switch power module 140.
The fixed frequency pulse width modulated chip that the preferred model of PWM chip U3 is TL949, the power pins 12 of PWM chip U3 is connected with the output D of the second driver module 120 as the power end D ' of switch power module 140, the first pwm signal pin 9 of PWM chip U3 is connected with the grid of metal-oxide-semiconductor T1 through one of them drive sub-circuits 142, the second pwm signal pin 10 of PWM chip U3 is connected with the grid of metal-oxide-semiconductor T2 through another drive sub-circuits 142, the source ground of metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2.
First of the PWM chip U3 pin 1 of just comparing is connected with the cathodic electricity of diode D6 or diode D8, the first anti-phase relatively pin 2, PWM feedback pin 3 of PWM chip U3 is all electrically connected with its reference voltage pin 14, between the first anti-phase relatively pin 2 and PWM feedback pin 3, is connected to dividing potential drop filtering device.
Second of PWM chip U3 pin 16 ground connection of just comparing, the second anti-phase relatively pin 15, reference voltage pin 14 and the output of PWM chip U3 are controlled pin 13 and are all connected with the 3rd Ausgang of transformer T1 and the cathodic electricity of diode D6 or diode D8.
The drive sub-circuits 142 of switch power module 140 comprises positive-negative-positive triode Q7, diode D9, resistance R 22, resistance R 23, the base stage of triode Q7 is connected with one of them pwm signal pin 9 or 10, the collector electrode of triode Q7 is connected with one of them pwm signal pin 9 or 10 through resistance R 22, the emitter of triode Q7 is connected with the negative electrode of diode D9, the anode of diode D9 is connected with the collector electrode of triode Q7, the emitter of triode Q7 is also connected with one end of resistance R 23, the other end of resistance R 23 is connected with the grid of metal-oxide-semiconductor T1 or T2 as the output of drive sub-circuits 142.
In addition, with reference to figure 5, in present embodiment, accessory power supply VCC is preferably by above-mentioned battery 300 and provides, and battery 300 by a switch SW after just for each circuit module provides accessory power supply VCC, it can be in the normal situation of AC power 500, and the working power of the commutation circuit of cutting off the electricity supply 100, reduces the wasting of resources when avoiding misoperation.
Below by the operation principle with an embodiment simple declaration power supply switch circuit 100.
It is the AC power 500 that 50Hz, rated voltage are 220V that AC power 500 provides frequency, in the time that AC power 500 is normal, triode Q6 conducting, the coil of relay K 1 does not connect one end of accessory power supply VCC can ground connection, relay K 1 is worked, two normal open switch of adhesive, light fixture 400 will directly be connected in AC power 500.Meanwhile, charging circuit 600 charges to battery 300, and powers to relay K 1.
When after AC power 500 power-off, charging circuit 600 is also by dead electricity, triode Q6 cut-off, and the coil blackout of relay K 1, two normal open switch of relay K 1 disconnect, and at this moment light fixture 400 will be connected to switch power module 140 and utilize battery 300 to power.The direct voltage that battery 300 voltages are 12V, after the boosting inverter of switch power module 140, powers the output OUT output 220V direct voltage at switch power module 140 to light fixture 400, this is that load is normally lit.
When after work a period of time; the pressure drop meeting step-down thereupon of battery 300; in the time being reduced to certain value; circuit carries out Cross prevention; make the controlled end C end of the second driver module 120 become high level from low level through the Cross prevention control circuit (being voltage comparison module 110) being formed from comparable chip; triode Q2 and Q3 will be cut off, thereby make PWM chip U3 by dead electricity, and the output OUT of switch power module 140 is output no.
A kind of lighting device is provided in addition, it comprises light fixture 400 and the electromagnetic compatibility circuit 200, charging circuit 600, the battery 300 that connect successively, light fixture 400 is connected with AC power 500 through electromagnetic compatibility circuit 200, the power supply switch circuit 100 that lighting device also comprises.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a power supply switch circuit, be connected with output, battery and the light fixture of electromagnetic compatibility circuit, the input incoming transport power supply of described electromagnetic compatibility circuit, the output of described electromagnetic compatibility circuit is connected with the charging circuit charging for described battery, it is characterized in that, described power supply switch circuit comprises relay, the first driver module, the second driver module, switch power module, voltage comparison module, wherein
The normally opened contact of described relay is connected with the output of described electromagnetic compatibility circuit, moving contact is connected with the input of described light fixture, normally-closed contact is connected with the output of described switch power module;
The input of described the first driver module is connected with the output of described electromagnetic compatibility circuit, control end is connected with the coil of described relay, output is connected with the first test side of described voltage comparison module, in the time that described AC power has Voltage-output, described the first driver module receives relay work described in the voltage control of described electromagnetic compatibility circuit output, and at its output output comparative voltage;
The input of described the second driver module is connected with accessory power supply, controlled end is connected with the drive end of described voltage comparison module, output is connected with the power end of described switch power module;
The input of described switch power module is connected with described battery, after the voltage transformation that described switch power module is exported described battery in the time of described AC power power-off, exports at its output;
The second test side of described voltage comparison module is connected with described battery, when the output of described the first driver module has comparative voltage output and/or during at described battery undervoltage, described voltage comparison module makes described the second driver module cut-off in its drive end output cut-off control signal; When the output of described the first driver module is incomparably compared with Voltage-output and described cell voltage when normal, described voltage comparison module makes described the second driver module conducting in its drive end output conducting control signal.
2. power supply switch circuit as claimed in claim 1, it is characterized in that, described voltage comparison module comprises comparable chip, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 1, capacitor C 2, diode D1, positive-negative-positive triode Q1 and diode D2, wherein
The first in-phase input end of described comparable chip as the first test side of described voltage comparison module be connected with the output of described the first driver module, the first inverting input and the second inverting input be electrically connected with described battery as the second test side of described voltage comparison module;
The first output of described comparable chip is connected with the base stage of described triode Q1 through described resistance R 1, the base stage of described triode Q1 is also connected with described accessory power supply through described resistance R 2, the emitter of described triode Q1 is connected with described accessory power supply through resistance R 3, the collector electrode of described triode Q1 is the anodic bonding with diode D1 through resistance R 4, and the negative electrode of described diode D1 is connected with the second in-phase input end of described comparable chip;
After described capacitor C 1 is in parallel with described resistance R 4 through resistance R 5 ground connection and with the anodic bonding of diode D2, the negative electrode of described diode D2 is connected with the second output of described comparable chip through resistance R 6, and the second output of described comparable chip is connected with the controlled end of described the second driver module as the drive end of described voltage comparison module;
The earth terminal ground connection of described comparable chip, power end are connected with described accessory power supply and through described capacitor C 2 ground connection.
3. power supply switch circuit as claimed in claim 1 or 2, is characterized in that, described the second driver module comprises positive-negative-positive triode Q2 and Q3, resistance R 7, resistance R 8 and resistance R 9, wherein,
The base stage of described triode Q2 is connected with the drive end of described voltage comparison module through described resistance R 7 as the controlled end of described the second driver module and described base stage is connected with described accessory power supply through resistance R 8, and the emitter of described triode Q2 is connected with described accessory power supply;
The collector electrode of described triode Q2 is connected with the base stage of described triode Q3 and through described resistance R 9 ground connection, the emitter of described triode Q3 is connected with described accessory power supply, collector electrode is connected as the output of described the second driver module and the power end of described switch power module.
4. power supply switch circuit as claimed in claim 1 or 2, it is characterized in that, the output of described electromagnetic compatibility circuit comprises the first output and the second output, described the first driver module comprises the first current limliting unit, the second current limliting unit, absorbing circuit, photoelectrical coupler, partial pressure unit and driver element, wherein
The first input end of described photoelectrical coupler is connected with the first output of described electromagnetic compatibility circuit through described the first current limliting unit, and the second input of described photoelectrical coupler is connected with the second output of described electromagnetic compatibility circuit through described the second current limliting unit;
Described absorption short circuit is connected between the first input end and the second input of described photoelectrical coupler;
The first output of described photoelectrical coupler accesses described accessory power supply and is connected with the power end of described driver element, the second output of described photoelectrical coupler is through described partial pressure unit ground connection, and be connected with the control end of described driver element, the first drive end of described driver element is as the control end of described the first driver module, and the second drive end of described driver element is as the output of described the first driver module.
5. power supply switch circuit as claimed in claim 4, it is characterized in that, described the first current limliting unit comprises current-limiting resistance R10, resistance R 11, resistance R 13 and resistance R 13, and described the second current limliting unit comprises current-limiting resistance R14, resistance R 15, resistance R 16 and resistance R 17;
Described current-limiting resistance R10 is connected with the first input end of described photoelectrical coupler with the first output that is connected to described electromagnetic compatibility circuit after current-limiting resistance R11 series connection, described current-limiting resistance R12 is connected with the first input end of described photoelectrical coupler with the first output that is connected to described electromagnetic compatibility circuit after current-limiting resistance R13 series connection, and described current-limiting resistance R10 is connected with the node of current-limiting resistance R13 series connection with described current-limiting resistance R12 with the node of current-limiting resistance R11 series connection;
Described current-limiting resistance R14 is connected to the second output of described electromagnetic compatibility circuit after connecting with current-limiting resistance R15 and the second input of described photoelectrical coupler is connected, described current-limiting resistance R16 is connected to the second output of described electromagnetic compatibility circuit after connecting with current-limiting resistance R17 and the second input of described photoelectrical coupler is connected, and described current-limiting resistance R14 is connected with the node of current-limiting resistance R17 series connection with described current-limiting resistance R16 with the node of current-limiting resistance R15 series connection.
6. power supply switch circuit as claimed in claim 4, it is characterized in that, described absorbing circuit comprises diode D3 and resistance R 18, anode, the negative electrode of described diode D3 are connected with the second input, the first input end of described light end coupler respectively, and described resistance R 18 is in parallel with described diode D3.
7. power supply switch circuit as claimed in claim 4, is characterized in that, described driver element comprises NPN type triode Q4, positive-negative-positive triode Q5, NPN type triode Q6 and diode D4, wherein,
The base stage of triode Q4 and Q5 is all connected with the second output of described photoelectrical coupler, and the collector electrode of triode Q4 is connected with described accessory power supply, emitter is connected with the emitter of described triode Q5, the grounded collector of described triode Q5;
The emitter of described triode Q4 is connected with the base stage of triode Q6 through a resistance R 19, and is connected with the negative electrode of diode D4, and the anode of described diode D4 is as the output of described the first driver module and through capacitor C 3 ground connection; Described diode D4 and negative electrode in parallel with a resistance R 20 is through capacitor C 4 ground connection;
The base stage of described triode Q6 is also connected as the control end of described the first driver module and coil one end of described relay through the collector electrode of resistance R 21 ground connection, the grounded emitter of described triode Q6, described triode Q6, and the other end of described coil is connected with described accessory power supply.
8. power supply switch circuit as claimed in claim 1, is characterized in that, described switch power module comprises PWM chip, transformer T1, two drive sub-circuits, N-type metal-oxide-semiconductor T1 and T2, diode D5, diode D6, diode D7 and diode D8, wherein,
The primary coil of described transformer T1 comprises first input end, the second input and the 3rd input between this first input end and the second input, the first input end of described transformer T1 is connected with metal-oxide-semiconductor T1 drain electrode, the second input of described transformer T1 is connected with metal-oxide-semiconductor T2 drain electrode, and the 3rd input of described transformer T1 is connected with described anode;
The secondary coil of described transformer T1 comprises the first output, the second output and the 3rd output between this first output and the second output, the first output of described transformer T1 and the described diode D5 being connected in series, the anodic bonding of diode D6, the second output of described transformer T1 and the described diode D7 being connected in series, the anodic bonding of diode D8, the negative electrode of described diode D6 and diode D8 is as the output of described switch power module;
The power pins of described PWM chip is connected with the output of described the second driver module as the power end of described switch power module, the first pwm signal pin of described PWM chip is connected with the grid of described metal-oxide-semiconductor T1 through described one of them drive sub-circuits, the second pwm signal pin of described PWM chip is connected with the grid of described metal-oxide-semiconductor T2 through described another drive sub-circuits, the source ground of described metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2;
First of the described PWM chip pin of just comparing is connected with the cathodic electricity of described diode D8, the first anti-phase relatively pin, PWM feedback pin of described PWM chip is all electrically connected with its reference voltage pin, between described the first anti-phase relatively pin and described PWM feedback pin, is connected to dividing potential drop filtering device;
Second of the described PWM chip pin ground connection of just comparing, the second anti-phase relatively pin, reference voltage pin and the output of described PWM chip are controlled pin and are all connected with the 3rd output of described transformer T1 and the cathodic electricity of described diode D8.
9. a lighting device, comprise light fixture and the electromagnetic compatibility circuit, charging circuit, the battery that connect successively, described light fixture is connected with AC power through described electromagnetic compatibility circuit, it is characterized in that, also comprises the power supply switch circuit as described in claim 1 to 8 any one.
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| CN201310196904.1A CN104184205A (en) | 2013-05-23 | 2013-05-23 | Power switching circuit and lighting equipment |
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| CN201310196904.1A CN104184205A (en) | 2013-05-23 | 2013-05-23 | Power switching circuit and lighting equipment |
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| CN201310196904.1A Pending CN104184205A (en) | 2013-05-23 | 2013-05-23 | Power switching circuit and lighting equipment |
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