CN101621256A - Power-supply system with power saving mechanism - Google Patents
Power-supply system with power saving mechanism Download PDFInfo
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- CN101621256A CN101621256A CN200910149659A CN200910149659A CN101621256A CN 101621256 A CN101621256 A CN 101621256A CN 200910149659 A CN200910149659 A CN 200910149659A CN 200910149659 A CN200910149659 A CN 200910149659A CN 101621256 A CN101621256 A CN 101621256A
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Abstract
The invention discloses a power-supply system with a power saving mechanism, comprising a voltage stabilizer, a power supply input module and a switching signal generating unit, wherein the voltage stabilizer is used for carrying out the voltage stabilization treatment of first voltage to generate second voltage; the power supply input module comprises a transformer, a rectifying unit, a switch and a switch control unit, the rectifying unit is matched with the transformer to convert input voltage into the first voltage, the switch is used for controlling current of a primary winding through the transformer, the switch control unit generates a control signal according to a switch signal to control the switch, and a switch signal generating unit is used for generating switch signals to remove the energy of the switch control unit in an energy transmission and removal time period.
Description
Technical field
The present invention refers to a kind of power-supply system of tool electricity-saving mechanism especially about a kind of power-supply system.
Background technology
Flyback power-supply system (Flyback Power System) has high efficiency, low-loss, small size and advantage such as in light weight, therefore by widely in order to the power supply change-over device as various electronic products.Please refer to Fig. 1, Fig. 1 is the electrical block diagram of flyback power-supply system 100 in the prior art.Rectification circuit 102 and filter capacitor 105 are used for that the AC-input voltage Vac that AC power supply 101 is provided is carried out rectifying and wave-filtering and handle to produce input voltage vin.Transformer 120 comprises elementary winding 121, secondary winding 122 and auxiliary winding 123, and wherein elementary winding 121 is in order to receive input voltage vin.First current rectifying and wave filtering circuit 170 is used for the preposition output voltage V op of secondary winding 122 inductions is carried out the rectifying and wave-filtering processing, is fed to first load 195 to produce the first output voltage V o1.Voltage stabilizing circuit 180 is used for that the first output voltage V o1 is carried out voltage stabilizing and handles, and is fed to second load 196 to produce the second output voltage V o2.The second output voltage V o2 can feedback to ON-OFF control circuit 130 to produce feedback signal Sfb via the signal processing of feedback circuit 140 in addition.Second current rectifying and wave filtering circuit 190 is used for that the induced voltage of auxiliary winding 123 is carried out rectifying and wave-filtering and handles, and is supplied to ON-OFF control circuit 130 to produce power source voltage Vcc.ON-OFF control circuit 130 produces the conduction and cut-off state of control signal Sc with control switch 125 according to feedback signal Sfb, and then control flows is through the electric current of elementary winding 121.
In the running of flyback power-supply system 100, the first output voltage V o1 that is supplied to first load 195 is higher than the second output voltage V o2 that is supplied to second load 196.When entering power-saving working mode, only need supply second stable output voltage V o2 to the second load 196, need not supply electric energy to the first load 195, yet the first output voltage V o1 still remains on high-voltage value, this moment, 100 meetings of flyback power-supply system consumed suitable electric power to keep the high-voltage value of the first output voltage V o1, so just can't reach the high purpose of economizing electrical efficiency.
Summary of the invention
The present invention discloses a kind of power-supply system of tool electricity-saving mechanism, and it comprises pressurizer, electric capacity, power supply input module and switching signal generation unit.Pressurizer comprises voltage input end mouth and voltage output end mouth, and wherein the voltage input end mouth is in order to receive first voltage, and the voltage output end mouth is in order to export second voltage.Electric capacity is electrically connected between the voltage input end mouth and reference potential of pressurizer.Power supply input module comprises transformer, rectification unit, switch and switch control unit.Transformer comprises elementary winding, secondary winding and auxiliary winding, and wherein elementary winding is used for receiving input voltage.Rectification unit is electrically connected between the voltage input end mouth of secondary winding and pressurizer, is used for producing first voltage.Switch is connected in series with elementary winding, in order to the electric current of control flows through elementary winding.Switch control unit is electrically connected on auxiliary winding and switch, is used for the conduction and cut-off state of control switch.The switching signal generation unit is electrically connected on the voltage output end mouth of pressurizer, is used for producing switching signal with decapacitation switch control unit in the power transfer decapacitation period, makes first voltage drop to the second predeterminated voltage value by the first predeterminated voltage value.
The present invention discloses a kind of power-supply system of tool electricity-saving mechanism in addition, and it comprises pressurizer, switching signal generation unit, feedback processing circuit and power supply input module.Pressurizer comprises voltage input end mouth and voltage output end mouth, and wherein the voltage input end mouth is in order to receive first voltage, and the voltage output end mouth is in order to export second voltage.The switching signal generation unit is electrically connected on the voltage output end mouth or the voltage input end mouth of pressurizer, is used for producing switching signal according to index signal.The feedback processing circuit is electrically connected on the voltage input end mouth and the switching signal generation unit of pressurizer, is used for producing feedback signal according to first voltage and switching signal.Power supply input module comprises transformer, rectification unit, switch and switch control unit.Transformer comprises elementary winding, secondary winding and auxiliary winding, and wherein elementary winding is used for receiving input voltage.Rectification unit is electrically connected between the voltage input end mouth of secondary winding and pressurizer, is used for producing first voltage.Switch is connected in series with elementary winding, in order to the electric current of control flows through elementary winding.Switch control unit is electrically connected on auxiliary winding and switch, is used for producing the conduction and cut-off state of control signal with control switch according to feedback signal.
The present invention discloses a kind of power-supply system of tool electricity-saving mechanism in addition, and it comprises pressurizer, switching signal generation unit, feedback processing circuit, first switch and power supply input module.Pressurizer comprises voltage input end mouth, voltage output end mouth and activation port, and wherein the voltage input end mouth is in order to receive first voltage, and the voltage output end mouth is in order to export second voltage, and the activation port is in order to receive first switching signal.The switching signal generation unit is electrically connected on the voltage output end mouth or the voltage input end mouth of pressurizer, is used for producing first switching signal, second switch signal and the 3rd switching signal according to index signal.The feedback processing circuit is electrically connected on the voltage input end mouth and the switching signal generation unit of pressurizer, is used for producing feedback signal according to first voltage and second switch signal.First switch is electrically connected between the voltage input end mouth and voltage output end mouth of pressurizer, is used for according to the voltage input end mouth of the 3rd switching signal control pressurizer and the electric connection between the voltage output end mouth.Power supply input module comprises transformer, rectification unit, second switch and switch control unit.Transformer comprises elementary winding, secondary winding and auxiliary winding, and wherein elementary winding is used for receiving input voltage.Rectification unit is electrically connected between the voltage input end mouth of secondary winding and pressurizer, is used for producing first voltage.Second switch is connected in series with elementary winding, in order to the electric current of control flows through elementary winding.Switch control unit is electrically connected on auxiliary winding and second switch, is used for producing the conduction and cut-off state of control signal with the control second switch according to feedback signal.
Description of drawings
Fig. 1 is the electrical block diagram of flyback power-supply system in the prior art;
Fig. 2 is the electrical block diagram of the power-supply system of first embodiment of the invention;
Fig. 3 be power-supply system shown in Figure 2 in the waveform schematic diagram of the coherent signal of battery saving mode work, wherein transverse axis is a time shaft;
Fig. 4 is the electrical block diagram of the power-supply system of second embodiment of the invention;
Fig. 5 be power-supply system shown in Figure 4 in the waveform schematic diagram of the coherent signal of battery saving mode work, wherein transverse axis is a time shaft;
Fig. 6 is the electrical block diagram of the power-supply system of third embodiment of the invention;
Fig. 7 is the waveform schematic diagram of the work coherent signal of power-supply system shown in Figure 6, and wherein transverse axis is a time shaft;
Fig. 8 is the electrical block diagram of the power-supply system of fourth embodiment of the invention;
Fig. 9 is the electrical block diagram of the power-supply system of fifth embodiment of the invention;
Figure 10 is the electrical block diagram of the power-supply system of sixth embodiment of the invention.
Embodiment
For making the present invention more apparent and understandable, hereinafter, cooperate appended graphic elaborating, but the embodiment that is provided not is the scope that contains in order to restriction the present invention especially exemplified by embodiment according to the power-supply system of tool electricity-saving mechanism of the present invention.
Please refer to Fig. 2, Fig. 2 is the electrical block diagram of the power-supply system 200 of first embodiment of the invention.As shown in Figure 2, power-supply system 200 comprises pressurizer 205, first electric capacity 211, second electric capacity 212, power supply input module 220, control unit 280 and optical coupling unit 265.Pressurizer 205 comprises voltage input end mouth 206, voltage output end mouth 207 and shared port 208, wherein voltage input end mouth 206 is in order to receive the first voltage Vout1, voltage output end mouth 207 is in order to the second voltage Vout2 of output less than the first voltage Vout1, and common port 208 is electrically connected on reference potential.In the embodiment shown in Figure 2, this reference potential is an earthing potential.Control unit 280 comprises switching signal generation unit 260.First electric capacity 211 is electrically connected between the voltage input end mouth 206 and reference potential of pressurizer 205, and purpose is providing the charge and discharge function.Second electric capacity 212 is electrically connected between the voltage output end mouth 207 and reference potential of pressurizer 205.
Power supply input module 220 comprises AC power supply 221, first rectification filtering unit 222, transformer 225, switch 230, resistance 231, rectification unit 235, second rectification filtering unit 240, switch control unit 245 and the slow circuit (Snubber Circuit) 250 that shakes.Switch 230 can be metal-oxide-semifield-effect electric crystal (Metal Oxide Semiconductor Field Effect Transistor) or Junction fet (Junction Field Effect Transistor).First rectification filtering unit 222 is used for that the AC-input voltage Vac that AC power supply 221 is provided is carried out rectifying and wave-filtering and handles to produce input voltage vin.Transformer 225 comprises elementary winding 226, secondary winding 227 and auxiliary winding 228, and wherein elementary winding 226 is used for receiving input voltage vin, and secondary winding 227 cooperates rectification unit 235 to produce the first voltage Vout1.Switch 230 is connected in series with elementary winding 226, is used for the electric current of control flows through elementary winding 226.The slow circuit 250 that shakes is electrically connected on elementary winding 226 and switch 230, is used for protection switch 230 to suffer damage when switching cut-off state avoiding.Resistance 231 is electrically connected between switch 230 and the earth terminal.
Second rectification filtering unit 240 is electrically connected between auxiliary winding 228 and the switch control unit 245, is used for that the induced voltage of auxiliary winding 228 is carried out rectifying and wave-filtering and handles, and is supplied to switch control unit 245 to produce power source voltage Vcc.Switch control unit 245 is electrically connected on the switch 230 and second rectification filtering unit 240, is used for producing control signal Sc with control switch 230 according to switching signal Ssw, and wherein control signal Sc is pulse wave width modulation (Pulse Width Modulation) signal.Control unit 280 is electrically connected on the voltage output end mouth 207 of pressurizer 205, with the second voltage Vout2 as its supply voltage.Control unit 280 receives power save signal Sps, when power save signal Sps activation power-saving working mode, control unit 280 is according to the voltage ripple amplitude of oscillation of the first voltage Vout1, the power transfer decapacitation period and the power transfer activation period of the electric current I x setting cycle that the voltage input end mouth 206 of the capacitance of first electric capacity 211 and pressurizer 205 is received, and driving switch signal generation unit 260 produces switching signal Ssw with decapacitation switch control unit 245 in the power transfer decapacitation period, thereby making control signal Sc in low voltage value, this moment, the low voltage value of control signal Sc was used for continuing cutoff switch 230 with the power transfer of decapacitation from elementary winding 226 to secondary winding 227.In another embodiment, power transfer decapacitation period and power transfer activation period are preestablished, and produce switching signal Ssw to carry out the periodic circuit decapacitation operation of switch control unit 245 in order to control unit 280 driving switch signal generation units 260 to be provided.Optical coupling unit 265 is electrically connected between switch control unit 245 and the switching signal generation unit 260, is used to provide the optical coupling interface with electrical isolation switch control unit 245 and switching signal generation unit 260.
Fig. 3 be power-supply system 200 shown in Figure 2 in the waveform schematic diagram of the coherent signal of battery saving mode work, wherein transverse axis is a time shaft.In Fig. 3, basipetal signal is respectively the first voltage Vout1, control signal Sc and switching signal Ssw.Please refer to Fig. 3 and Fig. 2, when switching signal Ssw is the first magnitude of voltage VL1 in power transfer activation period Ton, switch control unit 245 is enabled to produce the tool control signal Sc of corresponding work period, be used for control switch 230 with the power transfer of activation from elementary winding 226 to secondary winding 227, and then make the first voltage Vout1 from the low ripple voltage Vmin paramount ripple voltage Vmax that rises.When switching signal Ssw is the second magnitude of voltage VL2 in power transfer decapacitation period Toff, switch control unit 245 is by decapacitation, thereby make control signal Sc in low voltage value, this moment, the low voltage value of control signal Sc was used for continuing cutoff switch 230 with the power transfer of decapacitation from elementary winding 226 to secondary winding 227, and then made the first voltage Vout1 drop to low ripple voltage Vmin from high ripple voltage Vmax.Low ripple voltage Vmin can be in order to drive the stable required minimum voltage of the second voltage Vout2 of pressurizer 205 outputs.From the above, in the battery saving mode work of power-supply system 200, switch control unit 245 by decapacitation periodically to reduce energy dissipation, so can show the raising power-efficient.
Please refer to Fig. 4, Fig. 4 is the electrical block diagram of the power-supply system 400 of second embodiment of the invention.As shown in Figure 4, power-supply system 400 is similar to power-supply system shown in Figure 2 200, and main difference is control unit 280 is replaced into control unit 480, and comprises partial pressure unit 470 in addition.Partial pressure unit 470 is electrically connected between the voltage input end mouth 206 and earth terminal of pressurizer 205, the dividing potential drop Vdiv that is used for producing the first voltage Vout1 exports control unit 480 to, and control unit 480 promptly produces switching signal Ssw according to dividing potential drop Vdiv with driving switch signal generation unit 260.In the embodiment of Fig. 4, partial pressure unit 470 comprises first resistance 471 and second resistance 472 of serial connection.In another embodiment, partial pressure unit 470 can comprise two metal-oxide-semifield-effect electric crystals of serial connection, produces dividing potential drop Vdiv in order to the voltage division processing of carrying out the first voltage Vout1 according to the aisle resistance of two metal-oxide-semifield-effect electric crystals.In another embodiment, partial pressure unit 470 can be omitted, that is control unit 480 is directly connected in the voltage input end mouth 206 of pressurizer 205, and control unit 48O produces switching signal Ssw according to the first voltage Vout1 with driving switch signal generation unit 260.
Fig. 5 be power-supply system 400 shown in Figure 4 in the waveform schematic diagram of the coherent signal of battery saving mode work, wherein transverse axis is a time shaft.In Fig. 5, basipetal signal is respectively dividing potential drop Vdiv, control signal Sc and switching signal Ssw.Please refer to Fig. 5 and Fig. 4, when switching signal Ssw when time T 0 is the first magnitude of voltage VL1, switch control unit 245 is enabled to produce the tool control signal Sc of corresponding work period, be used for control switch 230 with the power transfer of activation from elementary winding 226 to secondary winding 227, and then dividing potential drop Vdiv is risen from low ripple voltage Vdmin.
When dividing potential drop Vdiv when time T 1 rises paramount ripple voltage Vdmax, the switching signal Ssw of the switching signal generation unit 260 output devices second magnitude of voltage VL2 is with decapacitation switch control unit 245, thereby make control signal Sc in low voltage value, this moment, the low voltage value of control signal Sc was used for continuing cutoff switch 230 with the power transfer of decapacitation from elementary winding 226 to secondary winding 227, and then dividing potential drop Vdiv is descended from high ripple voltage Vdmax.When dividing potential drop Vdiv when time T 2 drops to low ripple voltage Vdmin, the switching signal Ssw of the switching signal generation unit 260 output devices first magnitude of voltage VL1 is with activation switch control unit 245, the switch control unit 245 that is enabled produces the tool control signal Sc of corresponding work period, be used for control switch 230 with the power transfer of activation from elementary winding 226 to secondary winding 227, and then dividing potential drop Vdiv is risen from low ripple voltage Vdmin.
In Fig. 5, the time difference between time T 2 and the time T 1 is power transfer decapacitation period Toff, and the time difference between time T 1 and the time T 0 is power transfer activation period Ton.In other words, switching signal generation unit 260 is directly according to the high ripple voltage Vdmax and the magnitude of voltage of low ripple voltage Vdmin with diverter switch signal Ssw of dividing potential drop Vdiv, so rather than can provide power transfer controlling mechanism more accurately according to precalculated power transfer decapacitation period Toff and power transfer activation period Ton with the magnitude of voltage switching of control switch signal Ssw.In like manner, in the battery saving mode work of power-supply system 400, switch control unit 245 still by decapacitation periodically to reduce energy dissipation, so also can show the raising power-efficient.
Please refer to Fig. 6, Fig. 6 is the electrical block diagram of the power-supply system 600 of third embodiment of the invention.As shown in Figure 6, power-supply system 600 comprises pressurizer 605, first electric capacity 611, second electric capacity 612, feedback processing circuit 615, power supply input module 620 and switching signal generation unit 660.Pressurizer 605 comprises voltage input end mouth 606, voltage output end mouth 607 and shared port 608, wherein voltage input end mouth 606 is in order to receive the first voltage Vout1, voltage output end mouth 607 is in order to export the second voltage Vout2, and common port 608 is electrically connected on reference potential.First electric capacity 611 is electrically connected between the voltage input end mouth 606 and reference potential of pressurizer 605.Second electric capacity 612 is electrically connected between the voltage output end mouth 607 and reference potential of pressurizer 605.Power supply input module 620 comprises AC power supply 621, first rectification filtering unit 622, transformer 625, first switch 630, resistance 631, rectification unit 635, second rectification filtering unit 640, switch control unit 645 and the slow circuit 650 that shakes.The internal circuit configuration of power supply input module 620 is same as power supply input module 220 shown in Figure 2, so repeat no more.
Switching signal generation unit 660 is electrically connected on the voltage output end mouth 607 of pressurizer 605, is as its supply voltage with the second voltage Vout2.In another embodiment, switching signal generation unit 660 can be electrically connected on the voltage input end mouth 606 of pressurizer 605, and with the first voltage Vout1 as its supply voltage.Switching signal generation unit 660 is used for according to index signal Sind producing switching signal Ssw, and then the running of the circuit of Control and Feedback treatment circuit 615.Feedback processing circuit 615 is electrically connected on the voltage input end mouth 606 and switching signal generation unit 660 of pressurizer 605, is used for producing feedback signal Sfb according to the first voltage Vout1 and switching signal Ssw.
Fig. 7 is the waveform schematic diagram of the work coherent signal of power-supply system 600 shown in Figure 6, and wherein transverse axis is a time shaft.In Fig. 7, basipetal signal is respectively the index signal Sind and the first voltage Vout1.Please refer to Fig. 7 and Fig. 6, when index signal Sind was the first magnitude of voltage VLa of indication normal manipulation mode in period Tnormal, the switching signal Ssw of switching signal generation unit 660 output device low voltage value was to end second switch 674.So the dividing potential drop Vdiv that is produced according to first resistance 671 and second resistance 672 is not influenced with second switch 674 by the 3rd resistance 673, the feedback signal Sfb that this moment, feedback processing circuit 615 was exported produces the first voltage Vout1 of tool high-voltage value VH in order to driving power input module 620.
When index signal Sind is the second magnitude of voltage VLb of indication power-saving working mode in period Tps, the switching signal Ssw of switching signal generation unit 660 output device high-voltage values is with conducting second switch 674, so the dividing potential drop Vdiv that is produced according to first resistance 671 and second resistance 672 can be improved by the 3rd resistance 673 and the influence of the aisle resistance of second switch 674, be used for reducing by the magnitude of voltage of 615 output feedback signal Sfb of feedback processing circuit, and then the work period of reduction control signal Sc is to produce the first voltage Vout1 of tool low voltage value VL.Low voltage value VL is a little more than the magnitude of voltage of the second voltage Vout2, if pressurizer 605 be low dropout voltage regulator (Low Dropout Regulator), then low voltage value VL is with regard to the magnitude of voltage of the second voltage Vout2 no better than.In other words, when entering power-saving working mode, power supply input module 620 only need provide the first voltage Vout1 of tool low voltage value VL to produce the second voltage Vout2 to drive pressurizer 605.So compared to known techniques, the running of the circuit of power-supply system 600 can reach the purpose that Geng Gao economizes electrical efficiency.
Please refer to Fig. 8, Fig. 8 is the electrical block diagram of the power-supply system 800 of fourth embodiment of the invention.As shown in Figure 8, power-supply system 800 is similar to power-supply system shown in Figure 6 600, and main difference is feedback processing circuit 615 is replaced into feedback processing circuit 815, in addition switching signal generation unit 660 is replaced into switching signal generation unit 860.The 3rd resistance 873 that feedback processing circuit 815 comprises serial connection is parallel to second resistance 672 with second switch 874, the three resistance 873 with second switch 874.Second switch 874 can be metal-oxide-semifield-effect electric crystal or Junction fet, the condition controlled switching signal Ssw that is exported in switching signal generation unit 860 of its conduction and cut-off.Index signal Sind during power-supply system 800 runnings and the signal waveform of the first voltage Vout1 are same as waveform shown in Figure 7, and the circuit working principle summary of power-supply system 800 is as follows.
When index signal Sind is the first magnitude of voltage VLa of indication normal manipulation mode in period Tnormal, the switching signal Ssw of switching signal generation unit 860 output device high-voltage values is with conducting second switch 874, so the dividing potential drop Vdiv that is produced according to first resistance 671 and second resistance 672 can be reduced by the 3rd resistance 873 and the influence of the aisle resistance of second switch 874, be used for improving the magnitude of voltage of 815 output feedback signal Sfb of feedback processing circuit, and then increase by the first voltage Vout1 of the work period of control signal Sc with generation tool high-voltage value VH.
When index signal Sind is the second magnitude of voltage VLb of indication power-saving working mode in period Tps, the switching signal Ssw of switching signal generation unit 860 output device low voltage value is to end second switch 874, so the dividing potential drop Vdiv that is produced according to first resistance 671 and second resistance 672 is not influenced with second switch 874 by the 3rd resistance 873, the feedback signal Sfb that this moment, feedback processing circuit 815 was exported produces the first voltage Vout1 of tool low voltage value VL in order to driving power input module 620.That is when entering power-saving working mode, power supply input module 620 only need provide the first voltage Vout1 of tool low voltage value VL to produce the second stable voltage Vout2 to drive pressurizer 605.In like manner, compared to known techniques, the running of the circuit of power-supply system 800 also can reach the purpose that Geng Gao economizes electrical efficiency.
Please refer to Fig. 9, Fig. 9 is the electrical block diagram of the power-supply system 900 of fifth embodiment of the invention.As shown in Figure 9, power-supply system 900 comprises pressurizer 905, first electric capacity 911, second electric capacity 912, first switch 913, feedback processing circuit 915, power supply input module 920 and switching signal generation unit 960.Pressurizer 905 comprises voltage input end mouth 906, voltage output end mouth 907, activation port 909 and shared port 908, wherein voltage input end mouth 906 is in order to receive the first voltage Vout1, voltage output end mouth 907 is in order to export the second voltage Vout2, activation port 909 is in order to receive the first switching signal Ssw1, and common port 908 is electrically connected between the reference potential.First electric capacity 911 is electrically connected between the voltage input end mouth 906 and reference potential of pressurizer 905.Second electric capacity 912 is electrically connected between the voltage output end mouth 907 and reference potential of pressurizer 905.First switch 913 is electrically connected between the voltage input end mouth 906 and voltage output end mouth 907 of pressurizer 905, is used for according to the voltage input end mouth 906 of the 3rd switching signal Ssw3 control pressurizer 905 and the electric connection between the voltage output end mouth 907.First switch 913 can be metal-oxide-semifield-effect electric crystal or Junction fet.Power supply input module 920 comprises AC power supply 921, first rectification filtering unit 922, transformer 925, second switch 930, resistance 931, rectification unit 935, second rectification filtering unit 940, switch control unit 945 and the slow circuit 950 that shakes.The internal circuit configuration of power supply input module 920 is same as power supply input module 220 shown in Figure 2, so repeat no more.
Switching signal generation unit 960 is electrically connected on the voltage output end mouth 907 of pressurizer 905, is as its supply voltage with the second voltage Vout2.In another embodiment, switching signal generation unit 960 can be electrically connected on the voltage input end mouth 906 of pressurizer 905, and with the first voltage Vout1 as its supply voltage.Switching signal generation unit 960 is used for according to index signal Sind producing the first switching signal Ssw1, second switch signal Ssw2 and the 3rd switching signal Ssw3, and then the circuit of control pressurizer 905, feedback processing circuit 915 and first switch 913 operates.
Feedback processing circuit 915 is electrically connected on the voltage input end mouth 906 and switching signal generation unit 960 of pressurizer 905, is used for producing feedback signal Sfb according to the first voltage Vout1 and second switch signal Ssw2.Feedback processing circuit 915 comprises optical coupling unit 965, first resistance 971, second resistance 972, the 3rd resistance 973 and the 3rd switch 974.Optical coupling unit 965 is electrically connected on switch control unit 945, is used for output feedback signal Sfb, that is the electrical isolation mechanism that feedback processing circuit 915 is provided based on optical coupling unit 965 is with output feedback signal Sfb.First resistance 971 and second resistance 972 are serially connected with between the voltage input end mouth 906 and earth terminal of pressurizer 905.The 3rd resistance 973 of serial connection and the 3rd switch 974 are parallel to first resistance, 971, the three switches 974 and can be metal-oxide-semifield-effect electric crystal or Junction fet, and its conduction and cut-off is condition controlled in second switch signal Ssw2.Index signal Sind during power-supply system 900 runnings and the signal waveform of the first voltage Vout1 are same as waveform shown in Figure 7, and the circuit working principle summary of power-supply system 900 is as follows.
When index signal Sind is the first magnitude of voltage VLa of indication normal manipulation mode in period Tnormal, the 3rd switching signal Ssw3 of switching signal generation unit 960 output device low voltage value and second switch signal Ssw2 are to end first switch 913 and the 3rd switch 974, and the first switching signal Ssw1 of output device enabled status is with activation pressurizer 905 in addition.So the dividing potential drop Vdiv that is produced according to first resistance 971 and second resistance 972 is not influenced by the 3rd resistance 973 and the 3rd switch 974, the first voltage Vout1 then can't transfer to the voltage output end mouth 907 of pressurizer 905 via first switch 913.The feedback signal Sfb that this moment, feedback processing circuit 915 was exported produces the first voltage Vout1 of tool high-voltage value VH in order to driving power input module 920, and pressurizer 905 just can produce the second voltage Vout2 according to this, exports from voltage output end mouth 907.
When index signal Sind is the second magnitude of voltage VLb of indication power-saving working mode in period Tps, the 3rd switching signal Ssw3 of switching signal generation unit 960 output device high-voltage values and second switch signal Ssw2 are with conducting first switch 913 and the 3rd switch 974, and the first switching signal Ssw1 of output device decapacitation state is with decapacitation pressurizer 905 in addition.So the dividing potential drop Vdiv that is produced according to first resistance 971 and second resistance 972 can be improved by the influence of the aisle resistance of the 3rd resistance 973 and the 3rd switch 974, be used for reducing by the magnitude of voltage of 915 output feedback signal Sfb of feedback processing circuit, and then the work period of reduction control signal Sc is to produce the first voltage Vout1 of tool low voltage value VL.Because this moment, pressurizer 905 was by decapacitation, that is the first voltage Vout1 of tool low voltage value VL does not need in order to drive pressurizer 905, so the low voltage value VL that can set the first voltage Vout1 equals the magnitude of voltage of the second voltage Vout2 in fact, directly transfers to the voltage output end mouth 907 of pressurizer 905 via first switch 913.In other words, when entering power-saving working mode, the load that the second voltage Vout2 is supplied, the first voltage Vout1 by tool low voltage value VL directly supplies in fact.So compared to known techniques, the running of the circuit of power-supply system 900 can reach the purpose that Geng Gao economizes electrical efficiency.
Please refer to Figure 10, Figure 10 is the electrical block diagram of the power-supply system 990 of sixth embodiment of the invention.As shown in figure 10, power-supply system 990 is similar to power-supply system shown in Figure 9 900, and main difference is feedback processing circuit 915 is replaced into feedback processing circuit 916, in addition switching signal generation unit 960 is replaced into switching signal generation unit 961.Feedback processing circuit 916 comprises the 3rd resistance 983 of serial connection and the 3rd switch 984, the three resistance 983 and the 3rd switch 984 and is parallel to second resistance 972.The 3rd switch 984 can be metal-oxide-semifield-effect electric crystal or Junction fet, the condition controlled second switch signal Ssw2 that is exported in switching signal generation unit 961 of its conduction and cut-off.Index signal Sind during power-supply system 990 runnings and the signal waveform of the first voltage Vout1 still are same as waveform shown in Figure 7, and the circuit working principle summary of power-supply system 990 is as follows.
When index signal Sind is the first magnitude of voltage VLa of indication normal manipulation mode in period Tnormal, the 3rd switching signal Ssw3 of switching signal generation unit 961 output device low voltage value and the second switch signal Ssw2 of tool high-voltage value are to end first switch 913 and conducting the 3rd switch 984, and the first switching signal Ssw1 of output device enabled status is with activation pressurizer 905 in addition.So the dividing potential drop Vdiv that is produced according to first resistance 971 and second resistance 972 can be reduced by the influence of the aisle resistance of the 3rd resistance 983 and the 3rd switch 984, be used for improving the magnitude of voltage of 916 output feedback signal Sfb of feedback processing circuit, and then increase by the first voltage Vout1 of the work period of control signal Sc with generation tool high-voltage value VH.This moment pressurizer 905 just according to the first voltage Vout1 producing the second voltage Vout2, export from voltage output end mouth 907.In addition, because of first switch 913 is cut off, so the first voltage Vout1 then can't transfer to the voltage output end mouth 907 of pressurizer 905 via first switch 913.
When index signal Sind is the second magnitude of voltage VLb of indication power-saving working mode in period Tps, the 3rd switching signal Ssw3 of switching signal generation unit 961 output device high-voltage values and the second switch signal Ssw2 of tool low voltage value are with conducting first switch 913 and by the 3rd switch 984, and the first switching signal Ssw1 of output device decapacitation state is with decapacitation pressurizer 905 in addition.So the dividing potential drop Vdiv that is produced according to first resistance 971 and second resistance 972 is not influenced by the 3rd resistance 983 and the 3rd switch 984, the feedback signal Sfb that this moment, feedback processing circuit 916 was exported produces the first voltage Vout1 of tool low voltage value VL in order to driving power input module 920.Because this moment, pressurizer 905 was by decapacitation, that is the first voltage Vout1 of tool low voltage value VL does not need in order to drive pressurizer 905, so the low voltage value VL that can set the first voltage Vout1 equals the magnitude of voltage of the second voltage Vout2 in fact, directly transfers to the voltage output end mouth 907 of pressurizer 905 via first switch 913.In other words, when entering power-saving working mode, the load that the second voltage Vout2 is supplied comes down to directly to be supplied by the first voltage Vout1 of tool low voltage value VL.In like manner, compared to known techniques, the running of the circuit of power-supply system 990 also can reach the purpose that Geng Gao economizes electrical efficiency.
In sum, power-supply system of the present invention can be by decapacitation switch control unit periodically reducing energy dissipation, or when entering power-saving working mode, only provide the continuous action load required low burning voltage, so, can show the raising power-efficient compared to known techniques.
Though the present invention discloses as above with embodiment, right its is not in order to limit the present invention, any have a technical field of the invention know the knowledgeable usually, without departing from the spirit and scope of the present invention, when doing various changes and retouching, therefore, claim scope of the present invention should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (20)
1. the power-supply system of a tool electricity-saving mechanism is characterized in that this power-supply system includes:
Pressurizer comprises voltage input end mouth and voltage output end mouth, and wherein this voltage input end mouth is in order to receive first voltage, and this voltage output end mouth is in order to export second voltage;
First electric capacity is electrically connected between the voltage input end mouth and reference potential of this pressurizer;
Power supply input module comprises:
Transformer comprises elementary winding, secondary winding and auxiliary winding, and wherein this elementary winding is used for receiving input voltage;
Rectification unit is electrically connected between the voltage input end mouth of this secondary winding and this pressurizer, is used for producing this first voltage;
Switch is connected in series with this elementary winding, in order to the electric current of control flows through this elementary winding; And
Switch control unit is electrically connected on this auxiliary winding and this switch, in order to control this switch; And
The switching signal generation unit is electrically connected on the voltage output end mouth of this pressurizer, is used for producing switching signal with this switch control unit of decapacitation in the power transfer decapacitation period, makes this first voltage drop to the second predeterminated voltage value by the first predeterminated voltage value.
2. power-supply system as claimed in claim 1 is characterized in that this power supply input module also comprises:
First rectification filtering unit is electrically connected on this elementary winding, is used for AC-input voltage is converted to this input voltage;
Second rectification filtering unit is electrically connected between this auxiliary winding and this switch control unit, is used for that the induced voltage of this auxiliary winding is carried out the rectifying and wave-filtering processing and is supplied to this switch control unit to produce supply voltage;
The slow circuit that shakes is electrically connected on this elementary winding and this switch; And
Resistance is electrically connected between this switch and the earth terminal.
3. power-supply system as claimed in claim 1 is characterized in that this power-supply system also comprises:
Optical coupling unit is electrically connected between this switching signal generation unit and this switch control unit, is used for providing electrical isolation mechanism between this switching signal generation unit and this switch control unit.
4. power-supply system as claimed in claim 1, it is characterized in that this first voltage has the voltage ripple amplitude of oscillation, this switching signal generation unit is set this power transfer decapacitation period according to the capacitance of this voltage ripple amplitude of oscillation and this first electric capacity, and this switching signal generation unit produces this switching signal with this switch control unit of decapacitation in this power transfer decapacitation period, be used for making this control signal in low voltage value.
5. power-supply system as claimed in claim 1 is characterized in that this power-supply system also comprises:
Partial pressure unit is electrically connected between the voltage input end mouth and this earth terminal of this pressurizer, and the dividing potential drop that is used for producing this first voltage exports this switching signal generation unit to; Wherein this switching signal generation unit according to this dividing potential drop to produce this switching signal.
6. power-supply system as claimed in claim 5, it is characterized in that this dividing potential drop has the voltage ripple amplitude of oscillation, this voltage ripple amplitude of oscillation is between high ripple voltage and low ripple voltage, when this branch is pressed on the very first time when rising to this high ripple voltage, this switching signal that this switching signal generation unit is produced is used for this switch control unit of decapacitation, make this control signal in low voltage value according to this, when this branch second time that was pressed on dropped to this low ripple voltage, this switching signal that this switching signal generation unit is produced was in order to this switch control unit of activation;
Wherein this power transfer decapacitation period is the time difference between this second time and this very first time.
7. power-supply system as claimed in claim 1 is characterized in that this switching signal generation unit is used for detecting this first voltage to produce this switching signal.
8. power-supply system as claimed in claim 7, it is characterized in that this first voltage has the voltage ripple amplitude of oscillation, this voltage ripple amplitude of oscillation is between high ripple voltage and low ripple voltage, when this first voltage when the very first time rises to this high ripple voltage, this switching signal that this switching signal generation unit is produced is used for this switch control unit of decapacitation, make this control signal in low voltage value according to this, when this first voltage when second time dropped to this low ripple voltage, this switching signal that this switching signal generation unit is produced is in order to this switch control unit of activation;
Wherein this power transfer decapacitation period is the time difference between this second time and this very first time.
9. the power-supply system of a tool electricity-saving mechanism is characterized in that this power-supply system includes:
Pressurizer comprises voltage input end mouth and voltage output end mouth, and wherein this voltage input end mouth is in order to receive first voltage, and this voltage output end mouth is in order to export second voltage;
The switching signal generation unit is electrically connected on the voltage output end mouth or the voltage input end mouth of this pressurizer, is used for producing switching signal according to index signal;
The feedback processing circuit is electrically connected on voltage input end mouth and this switching signal generation unit of this pressurizer, is used for producing feedback signal according to this first voltage and this switching signal; And
Power supply input module comprises:
Transformer comprises elementary winding, secondary winding and auxiliary winding, and wherein this elementary winding is used for receiving input voltage;
Rectification unit is electrically connected between the voltage input end mouth of this secondary winding and this pressurizer, is used for producing this first voltage;
First switch is connected in series with this elementary winding, in order to the electric current of control flows through this elementary winding; And
Switch control unit is electrically connected on this auxiliary winding and this first switch, is used for producing control signal to control this first switch according to this feedback signal.
10. power-supply system as claimed in claim 9 is characterized in that this power-supply system also comprises:
First electric capacity is electrically connected between the voltage input end mouth and reference potential of this pressurizer; And
Second electric capacity is electrically connected between the voltage output end mouth and this reference potential of this pressurizer.
11. power-supply system as claimed in claim 9 is characterized in that this power supply input module also comprises:
First rectification filtering unit is electrically connected on this elementary winding, is used for AC-input voltage is converted to this input voltage;
Second rectification filtering unit is electrically connected between this auxiliary winding and this switch control unit, is used for that the induced voltage of this auxiliary winding is carried out the rectifying and wave-filtering processing and is supplied to this switch control unit to produce supply voltage;
The slow circuit that shakes is electrically connected on this elementary winding and this first switch; And
Resistance is electrically connected between this first switch and the earth terminal.
12. power-supply system as claimed in claim 9 is characterized in that this feedback processing circuit comprises:
Optical coupling unit is electrically connected on this switch control unit, is used for exporting this feedback signal; And
First resistance and second resistance are serially connected with between the voltage input end mouth and this earth terminal of this pressurizer;
Wherein this feedback processing circuit based on electrical isolation mechanism that this optical coupling unit provided to export this feedback signal.
13. power-supply system as claimed in claim 12 is characterized in that this feedback processing circuit comprises in addition:
The 3rd resistance and the second switch of serial connection, in parallel with this first resistance, this second switch is controlled by this switching signal;
Wherein when this index signal is first status signal, this switching signal that this switching signal generation unit produces is used for by this second switch adjusting this feedback signal, and then this control signal of modulation is with this first voltage of output device high-voltage value; When this index signal was second status signal, this switching signal that this switching signal generation unit produces be used for this second switch of conducting adjusting this feedback signal, and then this control signal of modulation was with this first voltage of output device low voltage value.
14. power-supply system as claimed in claim 12 is characterized in that this feedback processing circuit comprises in addition:
The 3rd resistance and the second switch of serial connection, in parallel with this second resistance, this second switch is controlled by this switching signal;
Wherein when this index signal is first status signal, this switching signal that this switching signal generation unit produces is used for this second switch of conducting adjusting this feedback signal, and then this control signal of modulation is to produce this first voltage of tool high-voltage value; When this index signal was second status signal, this switching signal that this switching signal generation unit produces was used for by this second switch adjusting this feedback signal, and then this control signal of modulation is to produce this first voltage of tool low voltage value.
15. the power-supply system of a tool electricity-saving mechanism is characterized in that this power-supply system includes:
Pressurizer comprises voltage input end mouth, voltage output end mouth and activation port, and wherein this voltage input end mouth is in order to receive first voltage, and this voltage output end mouth is in order to export second voltage, and this activation port is in order to receive first switching signal;
The switching signal generation unit is electrically connected on the voltage output end mouth or the voltage input end mouth of this pressurizer, is used for producing this first switching signal, second switch signal and the 3rd switching signal according to index signal;
The feedback processing circuit is electrically connected on voltage input end mouth and this switching signal generation unit of this pressurizer, is used for producing feedback signal according to this first voltage and this second switch signal;
First switch is electrically connected between the voltage input end mouth and voltage output end mouth of this pressurizer, is used for controlling the voltage input end mouth of this pressurizer and the electric connection between the voltage output end mouth according to the 3rd switching signal; And
Power supply input module comprises:
Transformer, comprise elementary winding, secondary winding, with auxiliary winding, wherein this elementary winding is used for receiving input voltage;
Rectification unit is electrically connected between the voltage input end mouth of this secondary winding and this pressurizer, is used for producing this first voltage;
Second switch is connected in series with this elementary winding, in order to the electric current of control flows through this elementary winding; And
Switch control unit is electrically connected on this auxiliary winding and this second switch, is used for producing control signal to control this second switch according to this feedback signal.
16. power-supply system as claimed in claim 15 is characterized in that this power-supply system also comprises:
First electric capacity is electrically connected between the voltage input end mouth and reference potential of this pressurizer; And
Second electric capacity is electrically connected between the voltage output end mouth and this reference potential of this pressurizer.
17. power-supply system as claimed in claim 15 is characterized in that this power supply input module comprises in addition:
First rectification filtering unit is electrically connected on this elementary winding, is used for AC-input voltage is converted to this input voltage;
Second rectification filtering unit is electrically connected between this auxiliary winding and this switch control unit, is used for that the induced voltage of this auxiliary winding is carried out the rectifying and wave-filtering processing and is supplied to this switch control unit to produce supply voltage;
The slow circuit that shakes is electrically connected on this elementary winding and this second switch; And
Resistance is electrically connected between this second switch and the earth terminal.
18. power-supply system as claimed in claim 15 is characterized in that this feedback processing circuit comprises:
Optical coupling unit is electrically connected on this switch control unit, is used for exporting this feedback signal; And
First resistance and second resistance are serially connected with between the voltage input end mouth and this earth terminal of this pressurizer;
Wherein this feedback processing circuit based on electrical isolation mechanism that this optical coupling unit provided to export this feedback signal.
19. power-supply system as claimed in claim 18 is characterized in that this feedback processing circuit comprises in addition:
The 3rd resistance and the 3rd switch of serial connection, in parallel with this first resistance, the 3rd switch is controlled by this second switch signal;
Wherein when this index signal is first status signal, this first switching signal that this switching signal generation unit is produced is used for this pressurizer of activation, the 3rd switching signal that this switching signal generation unit is produced is used for by this first switch, this second switch signal that this switching signal generation unit is produced is used for by the 3rd switch adjusting this feedback signal, and then this control signal of modulation is to produce this first voltage of tool high-voltage value; When this index signal is second status signal, this first switching signal that this switching signal generation unit is produced is used for this pressurizer of decapacitation, the 3rd switching signal that this switching signal generation unit is produced is used for this first switch of conducting, this second switch signal that this switching signal generation unit is produced is used for conducting the 3rd switch adjusting this feedback signal, and then this control signal of modulation is to produce this first voltage of tool low voltage value.
20. power-supply system as claimed in claim 18 is characterized in that this feedback processing circuit comprises in addition:
The 3rd resistance and the 3rd switch of serial connection, in parallel with this second resistance, the 3rd switch is controlled by this second switch signal;
Wherein when this index signal is first status signal, this first switching signal that this switching signal generation unit is produced is used for this pressurizer of activation, the 3rd switching signal that this switching signal generation unit is produced is used for by this first switch, this second switch signal that this switching signal generation unit is produced is used for conducting the 3rd switch adjusting this feedback signal, and then this control signal of modulation is to produce this first voltage of tool high-voltage value; When this index signal is second status signal, this first switching signal that this switching signal generation unit is produced is used for this pressurizer of decapacitation, the 3rd switching signal that this switching signal generation unit is produced is used for this first switch of conducting, this second switch signal that this switching signal generation unit is produced is used for by the 3rd switch adjusting this feedback signal, and then this control signal of modulation is to produce this first voltage of tool low voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910149659A CN101621256A (en) | 2009-06-10 | 2009-06-10 | Power-supply system with power saving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910149659A CN101621256A (en) | 2009-06-10 | 2009-06-10 | Power-supply system with power saving mechanism |
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|---|---|
| CN101621256A true CN101621256A (en) | 2010-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910149659A Pending CN101621256A (en) | 2009-06-10 | 2009-06-10 | Power-supply system with power saving mechanism |
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| CN (1) | CN101621256A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166487A (en) * | 2011-12-15 | 2013-06-19 | 三星电子株式会社 | Switch mode power supply for an image forming apparatus |
| CN105262354A (en) * | 2015-10-26 | 2016-01-20 | 苏州佳世达电通有限公司 | Alternating-current power source detection device |
| CN107567132A (en) * | 2017-08-30 | 2018-01-09 | 苏州佳世达光电有限公司 | Drive circuit, control method and projector |
-
2009
- 2009-06-10 CN CN200910149659A patent/CN101621256A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166487A (en) * | 2011-12-15 | 2013-06-19 | 三星电子株式会社 | Switch mode power supply for an image forming apparatus |
| CN105262354A (en) * | 2015-10-26 | 2016-01-20 | 苏州佳世达电通有限公司 | Alternating-current power source detection device |
| CN105262354B (en) * | 2015-10-26 | 2017-12-01 | 苏州佳世达电通有限公司 | Sensing apparatus for AC power supply |
| CN107567132A (en) * | 2017-08-30 | 2018-01-09 | 苏州佳世达光电有限公司 | Drive circuit, control method and projector |
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