CN202034910U - Power supply with voltage-limiting effect - Google Patents
Power supply with voltage-limiting effect Download PDFInfo
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- CN202034910U CN202034910U CN2010205770683U CN201020577068U CN202034910U CN 202034910 U CN202034910 U CN 202034910U CN 2010205770683 U CN2010205770683 U CN 2010205770683U CN 201020577068 U CN201020577068 U CN 201020577068U CN 202034910 U CN202034910 U CN 202034910U
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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
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a power supply with a voltage-limiting effect, comprising a rectifier circuit, a surge prevention circuit, a DC-DC converting circuit, a power factor correcting control circuit, a voltage-limiting circuit and a standby power output circuit, wherein the rectifier circuit receives an alternating-current power supply and converts the alternating-current power supply into a full-wave voltage that is output to the DC-DC converting circuit by the surge prevention circuit; the DC-DC conversion circuit can establish a boosting voltage; when the boosting voltage achieves a default value, the standby power output circuit provides a power supply so as to lead the surge prevention circuit to act, thus raising the boosting voltage; the voltage-limiting circuit can limit the voltage of the power factor correction (PFC) error amplification output terminal of a power factor control integration circuit to a certain value; and even when the boosting voltage is increased suddenly, the voltage of the power factor correction (PFC) error amplification output terminal is not influenced so that the standby power output circuit can normally supply with the standby voltage.
Description
Technical field
The utility model relates to a kind of power supply unit, particularly relates to a kind of power supply unit of tool pressure limiting effect.
Background technology
With reference to figure 1, existing power supply unit includes a rectification circuit 50, a surging (inrush current) prevents that circuit 60, a direct current are to DC converting circuit 70, a power factor correcting control circuit 80 and a standby power (VSB) output circuit 90.
This rectification circuit 50 has an input 51 and an output 52, and this input 51 connects an AC power (AC input), and rectification circuit 50 is converted to an all-wave voltage with this AC power (AC input) and is exported by this output 52.
This surging prevents that circuit 60 from including:
One thermistor (RT), one end are connected to the output 52 of this rectification circuit 50;
One relay 61 includes a switch 610 and a control end 611, and these switch 610 cross-over connections are in the two ends of this thermistor (RT), and this control end 611 is used for controlling this switch 610 closures, makes thermistor (RT) two terminal shortcircuits.
This direct current includes DC converting circuit 70:
One inductance (L1), the one end is connected to the other end of this thermistor (RT);
One first diode (D1), its anode tap connects the other end of this inductance (L1);
One first switch module 71 has a control end 711, and this first switch module 71 is to be connected electrically between the anode tap and a ground connection (GND) of this first diode (D1);
One second diode (D2), its anode tap are electrically connected between this thermistor (RT) and this inductance (L1), and its cathode terminal connects the cathode terminal of this first diode (D1);
One boost capacitor (Cbuck), cross-over connection have a booster voltage (Vbulk) on this boost capacitor (Cbuck) between the cathode terminal and ground connection of second diode (D2);
One first transformer (T1), its first side winding connects the cathode terminal of this first diode (D1), and its secondary side winding is exported a main power source (Vmain);
One second switch assembly 72 has a control end 721, and this second switch assembly 72 is to be connected between the first side winding and ground connection of first transformer (T1);
One first feedback circuit 73 connects this main power source (Vmain) and exports a feedback voltage.
This power factor correcting control circuit 80 includes a power factor control integrated circuit 81, the model of this power factor control integrated circuit 81 is CM6800, include a power input (Vccp), a feedback voltage end (VDC), a power factor control end (PFCOUT), a pulse duration control end (PWMOUT), a loop current sense terminals (Isense), a soft start end (SS), a power factor correcting (PFC) error amplification output (VEAO) and a power factor correcting (PFC) error and amplify input (VFB), wherein:
This feedback voltage end (VDC) connects the feedback voltage that this first feedback circuit 73 is exported.
This power factor control end (PFCOUT) is electrically connected the control end 711 of this first switch module 71.
This pulse duration control end (PWMOUT) is electrically connected the control end 721 of second switch assembly 72.
This loop current sense terminals (Isense) utilizes a resistance (Rb) to detect the electric current of these rectification circuit 50 outputs, and this resistance (Rb) connects between the output and this earth terminal (GND) of this rectification circuit 50.
This soft start end (SS) is electrically connected a soft start capacitor (Css).
This power factor correcting error is amplified the cathode terminal that input (VFB) is electrically connected this first diode (D1).
This standby power (VSB) output circuit 90 includes:
One second transformer (T2), its primary side has two windings, first winding connects the cathode terminal of this first diode (D1) to receive this booster voltage (Vbulk), second winding is connected to the power input (Vccp) of this power factor control integrated circuit 81 and the control end 611 of this relay 61, in order to a power supply (Vccp) to be provided, its secondary side is exported a standby power (VSB);
One controller 91 has a control end 911, and this controller 91 is connected between this first winding and the ground connection,
One second feedback circuit 92 connects this standby power (VSB) and exports the control end 911 of a control voltage to this controller 91, and this standby voltage (VSB) sees through second feedback circuit, 92 these these first windings of controller 91 conductings of control.
The function mode of circuit below is described, AC power (AC input) send electricity to the input 51 of this rectification circuit 50, this rectification circuit 50 is sent electric current through thermistor (RT) by output 52, this thermistor (RT) has the current limliting effect, in order to the burst current (inrush current) that suppresses to be produced when this AC power (AC input) begins to connect, avoid burst current that the back connection circuit is damaged.
Send electric current along with what rectification circuit 50 continued, on this boost capacitor (Cbuck), can set up a booster voltage (Vbulk), first winding of this second transformer (T2) primary side receives this booster voltage (Vbulk), its second winding produces power supply (Vccp), and this relay 61 and this power factor control integrated circuit 81 is given in power supply; When this booster voltage (Vbulk) reaches a predetermined value, this power supply will make this relay 61 starts, and the switch 610 that makes this relay 61 is closed and with thermistor (RT) short circuit; The internal circuit of this power factor control integrated circuit 81 charges to this soft start capacitor (Css) via this soft start end (SS), when the terminal voltage of soft start capacitor (Css) charging reaches certain value, this power factor control integrated circuit 81 makes this direct current to DC converting circuit 70 beginning starts just by pulse duration control end (PWMOUT) output control signal.
Yet, when thermistor (RT) instantaneous short circuit, originally be delivered on the boost capacitor (Cbuck) in the pressure drop on the thermistor (RT), booster voltage (Vbulk) is heightened suddenly, please refer to Fig. 2 and shown in Figure 3, through measuring, suddenly the booster voltage (Vbulk) that increases can cause the power factor correcting error amplification output (VEAO) of this power factor control integrated circuit 81 to be increased to 6V nearly suddenly, wherein, these power factor control integrated circuit 81 internal circuits have a fader (Gain Modulator), this fader can be exported a gain current (Igainmod), the power factor correcting error is amplified output (VEAO) and is gone up the voltage that improves suddenly, and the gain current (Igainmod) of this fader is increased.Because gain current (Igainmod) improves, thereby the turn-on cycle of first switch module 71 strengthens, and after turn-on cycle became greatly, the input current of AC power (Iin) also improved in the lump, so produce surging (A).
Please refer to shown in Figure 3, the surging phenomenon of input current makes the detected voltage of loop current sense terminals (Isense) of power factor control integrated circuit 81 reach its critical value (1V), make this power factor control end (PFCOUT) produce oscillatory occurences closing this first switch module 71 and open between first switch module 71, after power factor correcting error amplification output (VEAO) reaches 6V, high dither (B) will take place in input current (Iin), the input current of high dither (Iin) further disturbs this standby power output circuit 90, these standby power output circuit 90 lockings can't be exported standby voltage (VSB) and can't the required start power supply of regular supply, cause power supply unit to start shooting.
The utility model content
Amplify output causes input current because of booster voltage increase suddenly surging phenomenon for solving its power factor correcting error of existing power supply supply, cause power supply unit to start shooting, main purpose of the present utility model is to provide a kind of power supply unit of tool pressure limiting effect, sees through a pressure limiting circuit power-limiting factor correction error and amplifies the voltage of output (VEAO) at certain value.
The purpose of this utility model is to adopt following technical scheme to realize.
Power supply unit according to the tool pressure limiting effect that the utility model proposes comprises
One rectification circuit changes an AC power into an all-wave voltage;
One surging prevents circuit, is electrically connected this rectification circuit, the burst current that produces when preventing the energising of this AC power;
One direct current is electrically connected this surging and prevents circuit DC converting circuit, and this direct current provides a main power source to DC converting circuit;
One power factor correcting control circuit, be electrically connected this direct current to DC converting circuit, proofread and correct the power factor of this direct current to DC converting circuit, this power factor correcting control circuit has a power factor control integrated circuit, and this power factor control integrated circuit comprises a power factor correcting error and amplifies an output and a soft start end;
One standby power output circuit, be electrically connected this surging and prevent that circuit, this direct current are to DC converting circuit and this power factor correcting control circuit, provide a power supply and prevent circuit and this power factor correcting control circuit for this surging, and export a standby power; It is characterized in that the power supply unit of described tool pressure limiting effect further comprises:
One pressure limiting circuit, the power factor correcting error that is electrically connected on this power factor correcting control circuit is amplified between output and the soft start end, be to limit the voltage of this power factor correcting error amplification output, make this standby power output circuit be able to the regular supply standby power at certain value.
The power supply unit of described tool pressure limiting effect, wherein:
This rectification circuit has an input and an output, and this input connects this AC power, and this AC power is converted to described all-wave voltage and by the output of this output;
This surging prevents that circuit from including:
One thermistor, the one end is connected to the output of this rectification circuit; And
One relay includes a switch and a control end, and this switch cross-over connection is in the two ends of this thermistor, and this control end is used for controlling this switch closure;
This direct current includes DC converting circuit:
One inductance, the one end is connected to the other end of this thermistor;
One first diode, its anode tap connects the other end of this inductance;
One first switch module has a control end, and this first switch module is to be connected electrically between the anode tap and a ground connection of this first diode;
One second diode, its anode tap are electrically connected between this thermistor and this inductance, and its cathode terminal connects the cathode terminal of this first diode;
One boost capacitor, its cross-over connection have a booster voltage on this boost capacitor between the cathode terminal and ground connection of second diode;
One first transformer, its first side winding connects the cathode terminal of this first diode, and its secondary side winding is exported described main power source;
One second switch assembly has a control end, and this second switch assembly is to be connected between the first side winding and ground connection of first transformer; And
One first feedback circuit connects this main power source and exports a feedback voltage;
This power factor correcting control circuit includes a power factor control integrated circuit, it includes a power input, a feedback voltage end, a power factor control end, a pulse duration control end, a loop current sense terminals, a soft start end, a power factor correcting error amplifies output and a power factor correcting error is amplified input, wherein:
This feedback voltage end connects the feedback voltage that this first feedback circuit is exported;
This power factor control end is electrically connected the control end of this first switch module;
This pulse duration control end is electrically connected the control end of second switch assembly;
This loop current sense terminals is utilized the electric current of this rectification circuit output of a resistance detection, and this resistance connects between the output and earth terminal of this rectification circuit;
This soft start end is electrically connected a soft start capacitor;
This power factor correcting error is amplified the cathode terminal that input is electrically connected this first diode;
This pressure limiting circuit includes a pressure limiting resistance and a pressure limiting diode, the anode tap of this pressure limiting diode is electrically connected the power factor correcting error of this power factor control integrated circuit and amplifies output, the cathode terminal of this pressure limiting diode connects an end of this pressure limiting resistance, and this pressure limiting resistance other end connects the soft start end of this power factor control integrated circuit;
This standby power output circuit includes:
One second transformer, its primary side has two windings, first winding connects the cathode terminal of this first diode, and second winding is connected to the power input of this power factor control integrated circuit and the control end of this relay, and its secondary side is exported described standby power;
One controller has a control end, and this controller is connected between this first winding and the ground connection;
One second feedback circuit connects this standby power and exports the control end of a control voltage to this controller.
The power supply unit of described tool pressure limiting effect, wherein said power factor control integrated circuit, its model are CM6800.
The power supply unit of described tool pressure limiting effect, wherein said pressure limiting resistance, its resistance value is 120k ohm.
The power supply unit idle power supply circuit of the tool pressure limiting effect that the utility model proposed, limit the power factor correcting error of this power factor control integrated circuit by this pressure limiting circuit and amplify the voltage of output at certain value, even booster voltage increases suddenly, still do not influence this power factor correcting error and amplify the voltage of output, make the power supply unit standby power be able to regular supply standby voltage.
Description of drawings
Fig. 1 is the circuit diagram of existing power supply supply idle power supply circuit.
Fig. 2 is voltage, the electric current mode chart of existing power supply supply idle power supply circuit.
Fig. 3 is voltage, the electric current mode chart of existing power supply supply idle power supply circuit.
Fig. 4 is the circuit diagram of the power supply unit of the utility model tool pressure limiting effect.
Fig. 5 is voltage, the current waveform figure of the power supply unit of the utility model tool pressure limiting effect.
Embodiment
Below cooperate the preferred embodiment of graphic and the utility model, further setting forth the utility model is to reach the technological means that predetermined utility model purpose is taked.
With reference to figure 4, the power supply unit of the utility model tool pressure limiting effect comprises a rectification circuit 10, a surging (inrush current) prevents that circuit 11, a direct current are to DC converting circuit 12, a power factor correcting control circuit 13, a pressure limiting circuit 14 and a standby power (VSB) output circuit 15.
This rectification circuit 10 changes an AC power into an all-wave voltage, it has an input 101 and an output 102, this input 101 connects these AC power (AC input), and this AC power (AC input) is converted to this all-wave voltage and by these output 102 outputs.
This surging prevents that circuit 11 is electrically connected these rectification circuits 10, the burst current that produces when preventing this AC power energising, and it includes:
One thermistor (RT), one end are connected to the output 102 of this rectification circuit 10;
One relay 110 includes a switch 111 and a control end 112, and these switch 111 cross-over connections are in the two ends of this thermistor (RT), and this control end 112 is used for controlling this switch 111 closures, makes thermistor (RT) two terminal shortcircuits.
This direct current is electrically connected this surging to DC converting circuit 12 and prevents circuit 11, and this direct current can provide a main power source (Vmain) to DC converting circuit, and it includes:
One inductance (L1), the one end is connected to the other end of this thermistor (RT);
One first diode (D1), its anode tap connects the other end of this inductance (L1);
One first switch module 121 has a control end 122, and this first switch module 121 is to be connected electrically between the anode tap and a ground connection (GND) of this first diode (D1);
One second diode (D2), its anode tap are electrically connected between this thermistor (RT) and this inductance (L1), and its cathode terminal connects the cathode terminal of this first diode (D1);
One boost capacitor (Cbuck), its cross-over connection have a booster voltage (Vbulk) on this boost capacitor (Cbuck) between the cathode terminal and ground connection of second diode (D2);
One first transformer (T1), its first side winding connects the cathode terminal of this first diode (D1), and its secondary side winding is exported described main power source (Vmain);
One second switch assembly 123 has a control end 124, and this second switch assembly 123 is to be connected between the first side winding and ground connection of first transformer (T1);
One first feedback circuit 125 connects this main power source (Vmain) and exports a feedback voltage.
This power factor correcting control circuit 13 is electrically connected this direct current to DC converting circuit 12, be to proofread and correct the power factor of this direct current to DC converting circuit 12, it includes a power factor control integrated circuit 130, the model of this power factor control integrated circuit 130 is CM6800, it includes a power input (Vccp), one feedback voltage end (VDC), one power factor control end (PFCOUT), one pulse duration control end (PWMOUT), one loop current sense terminals (Isense), one soft start end (SS), one power factor correcting error amplifies output (VEAO) and a power factor correcting error is amplified input (VFB), wherein:
This feedback voltage end (VDC) connects the feedback voltage that this first feedback circuit 125 is exported.
This power factor control end (PFCOUT) is electrically connected the control end 122 of this first switch module 121.
This pulse duration control end (PWMOUT) is electrically connected the control end 124 of second switch assembly 123.
This loop current sense terminals (Isense) utilizes a resistance (Rb) to detect the electric current of these rectification circuit 10 outputs, and this resistance (Rb) connects between the output 102 and earth terminal of this rectification circuit 10.
This soft start end (SS) is electrically connected a soft start capacitor (Css).
This power factor correcting error is amplified the cathode terminal that input (VFB) is electrically connected this first diode (D1).
This pressure limiting circuit 14 is electrically connected this power factor correcting control circuit 13, it includes a pressure limiting resistance (RL) and a pressure limiting diode (DL), the anode tap of this pressure limiting diode (DL) is electrically connected the power factor correcting error of this power factor control integrated circuit 130 and amplifies output (Veao), the cathode terminal of this pressure limiting diode (DL) connects an end of this pressure limiting resistance (RL), this pressure limiting resistance (RL) other end connects the soft start end (SS) of this power factor control integrated circuit 130, and the resistance value of this pressure limiting resistance (RL) can be 120k ohm.
This standby power output circuit 15 is electrically connected this surging and prevents that circuit 11, this direct current are to DC converting circuit 12 and this power factor correcting control circuit 13, providing a power supply prevents circuit 11 and this power factor correcting control circuit 13 for this surging, and export a standby power (VSB), it includes:
One second transformer (T2), its primary side has two windings, first winding connects the cathode terminal of this first diode (D1) to receive this booster voltage (Vbulk), second winding is connected to the power input (Vccp) of this power factor control integrated circuit 130 and the control end 112 of this relay 110, in order to described power supply to be provided, its secondary side is exported described standby power (VSB);
One controller 150 has a control end 151, and this controller 150 is connected between this first winding and the ground connection;
One second feedback circuit 152 connects this standby power (VSB) and exports the control end 151 of a control voltage to this controller 150, and this standby voltage (VSB) sees through second feedback circuit, 152 these these first windings of controller 150 conductings of control.
The function mode of this circuit below is described, AC power (AC input) send electricity to the input 101 of this rectification circuit 10, this rectification circuit 10 is sent electric current through thermistor (RT) by output 102, this thermistor (RT) has the current limliting effect, in order to the burst current (inrush current) that suppresses to be produced when this AC power (AC input) begins to connect, avoid burst current that the back connection circuit is damaged.
Send electric current along with what rectification circuit 10 continued, on this boost capacitor (Cbuck), can set up a booster voltage (Vbulk), first winding of this second transformer (T2) primary side receives this booster voltage (Vbulk), and its second winding is given the control end 112 of this relay 110 and the power input (Vccp) of this power factor control integrated circuit 81 along with producing described power supply; When this booster voltage (Vbulk) reaches a predetermined value, this power supply will make this relay 61 starts, and the switch 610 that makes this relay 61 is closed and with this thermistor (RT) short circuit.
And before booster voltage (Vbulk) reaches this predetermined value, the soft start end (SS) of this power factor control integrated circuit 130 does not begin electronegative potential is kept in soft start capacitor (Css) charging, this moment, this power factor correcting error was amplified the low current (Isink) of the fixing output of output (VEAO) meeting one about 40 micromicroamperes (uA), please refer to shown in Figure 5, the voltage that this power factor correcting error is amplified output (VEAO) is limited to certain value by this pressure limiting diode (DL) and this pressure limiting resistance (RL), be about 4.7V (Veao=Isink*RL+VDL=4.7V), avoid the voltage of power factor correcting error amplification output (VEAO) excessive.
By this, even thermistor (RT) instantaneous short circuit, originally be delivered on the boost capacitor (Cbuck) in the pressure drop on the thermistor (RT), booster voltage (Vbulk) is heightened suddenly, and the power factor correcting error of this power factor control integrated circuit 130 is amplified output (VEAO) and still is limited in this definite value by this pressure limiting circuit 14; So, even booster voltage (Vbulk) increases suddenly, still do not influence this power factor correcting error and amplify the voltage of output (VEAO), the detected voltage of loop current sense terminals (Isense) does not reach its critical value (1V), this power factor control end (PFCOUT) can be stablized running, make input current (Iin) that the situation of high dither (B) can not take place, then the standby power output circuit is able to regular supply standby power (VSB).
The above only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in the scope that does not break away from technical solutions of the utility model, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (4)
1. the power supply unit of a tool pressure limiting effect is characterized in that comprising
One rectification circuit changes an AC power into an all-wave voltage;
One surging prevents circuit, is electrically connected this rectification circuit, the burst current that produces when preventing the energising of this AC power;
One direct current is electrically connected this surging and prevents circuit DC converting circuit, and this direct current provides a main power source to DC converting circuit;
One power factor correcting control circuit, be electrically connected this direct current to DC converting circuit, proofread and correct the power factor of this direct current to DC converting circuit, this power factor correcting control circuit has a power factor control integrated circuit, and this power factor control integrated circuit comprises a power factor correcting error and amplifies an output and a soft start end;
One standby power output circuit, be electrically connected this surging and prevent that circuit, this direct current are to DC converting circuit and this power factor correcting control circuit, provide a power supply and prevent circuit and this power factor correcting control circuit for this surging, and export a standby power; The power supply unit of described tool pressure limiting effect further comprises:
One pressure limiting circuit, the power factor correcting error that is electrically connected on this power factor correcting control circuit is amplified between output and the soft start end, be to limit the voltage of this power factor correcting error amplification output, make this standby power output circuit be able to the regular supply standby power at certain value.
2. the power supply unit of tool pressure limiting effect according to claim 1 is characterized in that:
This rectification circuit has an input and an output, and this input connects this AC power, and this AC power is converted to described all-wave voltage and by the output of this output;
This surging prevents that circuit from including:
One thermistor, the one end is connected to the output of this rectification circuit; And
One relay includes a switch and a control end, and this switch cross-over connection is in the two ends of this thermistor, and this control end is used for controlling this switch closure;
This direct current includes DC converting circuit:
One inductance, the one end is connected to the other end of this thermistor;
One first diode, its anode tap connects the other end of this inductance;
One first switch module has a control end, and this first switch module is to be connected electrically between the anode tap and a ground connection of this first diode;
One second diode, its anode tap are electrically connected between this thermistor and this inductance, and its cathode terminal connects the cathode terminal of this first diode;
One boost capacitor, its cross-over connection have a booster voltage on this boost capacitor between the cathode terminal and ground connection of second diode;
One first transformer, its first side winding connects the cathode terminal of this first diode, and its secondary side winding is exported described main power source;
One second switch assembly has a control end, and this second switch assembly is to be connected between the first side winding and ground connection of first transformer; And
One first feedback circuit connects this main power source and exports a feedback voltage;
This power factor correcting control circuit includes a power factor control integrated circuit, it includes a power input, a feedback voltage end, a power factor control end, a pulse duration control end, a loop current sense terminals, a soft start end, a power factor correcting error amplifies output and a power factor correcting error is amplified input, wherein:
This feedback voltage end connects the feedback voltage that this first feedback circuit is exported;
This power factor control end is electrically connected the control end of this first switch module;
This pulse duration control end is electrically connected the control end of second switch assembly;
This loop current sense terminals is utilized the electric current of this rectification circuit output of a resistance detection, and this resistance connects between the output and earth terminal of this rectification circuit;
This soft start end is electrically connected a soft start capacitor;
This power factor correcting error is amplified the cathode terminal that input is electrically connected this first diode;
This pressure limiting circuit includes a pressure limiting resistance and a pressure limiting diode, the anode tap of this pressure limiting diode is electrically connected the power factor correcting error of this power factor control integrated circuit and amplifies output, the cathode terminal of this pressure limiting diode connects an end of this pressure limiting resistance, and this pressure limiting resistance other end connects the soft start end of this power factor control integrated circuit;
This standby power output circuit includes:
One second transformer, its primary side has two windings, first winding connects the cathode terminal of this first diode, and second winding is connected to the power input of this power factor control integrated circuit and the control end of this relay, and its secondary side is exported described standby power;
One controller has a control end, and this controller is connected between this first winding and the ground connection;
One second feedback circuit connects this standby power and exports the control end of a control voltage to this controller.
3. the power supply unit of tool pressure limiting effect according to claim 1 and 2 is characterized in that: in described power factor control integrated circuit, its model is CM6800.
4. the power supply unit of tool pressure limiting effect according to claim 1 and 2 is characterized in that: at described pressure limiting resistance, its resistance value is 120k ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205770683U CN202034910U (en) | 2010-10-26 | 2010-10-26 | Power supply with voltage-limiting effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205770683U CN202034910U (en) | 2010-10-26 | 2010-10-26 | Power supply with voltage-limiting effect |
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| CN202034910U true CN202034910U (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205770683U Expired - Fee Related CN202034910U (en) | 2010-10-26 | 2010-10-26 | Power supply with voltage-limiting effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638898A (en) * | 2013-11-12 | 2015-05-20 | 沈阳新松机器人自动化股份有限公司 | Soft start control device system |
| CN109155584A (en) * | 2016-04-15 | 2019-01-04 | 艾默生环境优化技术有限公司 | Choke coil and electromagnetic interface filter circuit for circuit of power factor correction |
| CN110456696A (en) * | 2019-07-31 | 2019-11-15 | 浪潮金融信息技术有限公司 | A kind of intelligent self-service terminal control system |
| CN112448600A (en) * | 2019-09-03 | 2021-03-05 | 西安航兴海拓电子科技有限公司 | Integrated power supply |
-
2010
- 2010-10-26 CN CN2010205770683U patent/CN202034910U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638898A (en) * | 2013-11-12 | 2015-05-20 | 沈阳新松机器人自动化股份有限公司 | Soft start control device system |
| CN109155584A (en) * | 2016-04-15 | 2019-01-04 | 艾默生环境优化技术有限公司 | Choke coil and electromagnetic interface filter circuit for circuit of power factor correction |
| CN109155584B (en) * | 2016-04-15 | 2020-10-16 | 艾默生环境优化技术有限公司 | Choke coil and EMI filter circuit for power factor correction circuit |
| CN110456696A (en) * | 2019-07-31 | 2019-11-15 | 浪潮金融信息技术有限公司 | A kind of intelligent self-service terminal control system |
| CN112448600A (en) * | 2019-09-03 | 2021-03-05 | 西安航兴海拓电子科技有限公司 | Integrated power supply |
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