CN2907074Y - Power factor correction circuit with input voltage control function - Google Patents
Power factor correction circuit with input voltage control function Download PDFInfo
- Publication number
- CN2907074Y CN2907074Y CNU2006201157097U CN200620115709U CN2907074Y CN 2907074 Y CN2907074 Y CN 2907074Y CN U2006201157097 U CNU2006201157097 U CN U2006201157097U CN 200620115709 U CN200620115709 U CN 200620115709U CN 2907074 Y CN2907074 Y CN 2907074Y
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- China
- Prior art keywords
- power factor
- circuit
- factor correction
- input voltage
- coupled
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
The utility model relates to a power factor correction circuit with input voltage control, comprising an inductor, a voltage detector with a default value, a power factor correction circuit, a switch, a rectifier and a capacitor, when input voltage is higher than the default value, the power factor correction circuit can output the control signal to shift the switch, when input voltage is lower than the default value, the power factor correction circuit can close the switch to stop shifting, the power factor correction circuit can solve the problem of large input current resulted from low input voltage.
Description
Technical field
The utility model relates to a kind of circuit of power factor correction, especially the circuit of power factor correction that refers to a kind of tool input voltage control, it has a detecting voltage device, in the time of can being higher than this default value in the accurate position of input voltage, this circuit of power factor correction is just exported control signal makes this switch begin to switch, the problem of the big input current that is caused during with the reduction low input.
Background technology
Press, the circuit of power factor correction of tool input voltage control can be used in the power supply unit usually, to improve its power factor.Please refer to Fig. 1 (a) and 1 (b), wherein Fig. 1 (a) illustrates power factor (power factor, definition schematic diagram PF); Fig. 1 (b) illustrates the input voltage of present known active circuit of power factor correction and the schematic diagram of output voltage.Shown in Fig. 1 (a), (powerfactor PF) is defined as PF=cos θ to power factor, and wherein θ represents the phase difference between input voltage and input current.
Shown in Fig. 1 (b), for the harmonic wave standard that reaches IEC1000-3-2 and to make power factor be 1, begin to export control signal (the active power correction circuit output signal among Fig. 1 (b)) when at present known active (active) power correction circuit has been set in the about 0V of input voltage all, so that make power circuit begin to switch.
Though above-mentioned active power correction circuit can obtain good power factor, but when low input, switch, will cause bigger input current, and then make the efficient of circuit significantly reduce; In addition, big input current also makes the magnet assembly in the active power correction circuit saturated easily, and improves the probability of mechanical disorder, for head it off need use more high-grade assembly, but so also will increase production cost, really belongs to a fly in the ointment.
In view of this, the circuit of power factor correction that needs a kind of tool input voltage control, it has a detecting voltage device, in the time of can being higher than this default value in the accurate position of input voltage, this circuit of power factor correction is just exported control signal makes this switch begin to switch, the problem of the big input current that is caused during with the reduction low input is to improve the shortcoming of known active power correction circuit.
The utility model content
A purpose of the present utility model provides a kind of circuit of power factor correction of tool input voltage control, it has a detecting voltage device, in the time of can being higher than this default value in the accurate position of input voltage, this circuit of power factor correction is just exported control signal makes this switch begin to switch, the problem of the big input current that is caused during with the reduction low input.
In order to achieve the above object, the circuit of power factor correction of a kind of tool input voltage control of the present utility model is characterized in that it has:
One inductor, the one end is coupled to a power input;
One detecting voltage device, one end are coupled to this inductor and this power input, and it has a default value to detect the accurate position of an input voltage;
One circuit of power factor correction, the one end is coupled to the output of this detecting voltage device;
One switch is to be one or three end assemblies, and its first end is coupled to the other end of this inductor, and second end is coupled to the output of this circuit of power factor correction, and the 3rd end couples ground connection behind another power input;
One rectifier, one end are coupled to first end of this inductor and this switch; And
One capacitor, the one end is coupled to the other end of this rectifier, and the other end is ground connection then; When the accurate position of this input voltage was higher than this default value, the exportable control signal of this circuit of power factor correction made this switch begin to switch; When the accurate position of this input voltage was lower than this default value, this circuit of power factor correction can be closed this switch and be stopped to switch.
Wherein this switch is a burning half-court effect transistor.
Wherein this burning half-court effect transistor is a N channel enhancement mode metal oxidation half-court effect transistor or P channel enhancement mode metal oxidation half-court effect transistor.
Wherein this first end is that this burning half field effect is answered transistor drain, and this second end is that this burning half field effect is answered transistorized grid, and the 3rd end is that this burning half field effect should transistorized source electrode.
Wherein this detecting voltage device is the loop that a Zener diode circuit, an operation amplifier circuit or are made of divider resistance.
Wherein the default value of this detecting voltage device is the 1-50% of input voltage.
It further has a bridge rectifier, and it is to be serially connected with between this power input and this detecting voltage device.
Wherein the detecting voltage of this detecting voltage device point is located at before or after this bridge rectifier.
The beneficial effects of the utility model are:
The circuit of power factor correction of tool input voltage control of the present utility model, it has a detecting voltage device, in the time of can being higher than this default value in the accurate position of input voltage, this circuit of power factor correction is just exported control signal makes this switch begin to switch, the problem of the big input current that is caused during with the reduction low input.
Description of drawings
For making the auditor can further understand structure of the present utility model, feature and purpose thereof, below in conjunction with the detailed description of accompanying drawing and preferred embodiment as after, wherein:
Fig. 1 (a) and 1 (b) are schematic diagram, and it illustrates definition schematic diagram and the input voltage of present known active circuit of power factor correction and the schematic diagram of output voltage of power factor respectively.
Fig. 2 is a schematic diagram, the block schematic diagram of the circuit of power factor correction that its tool input voltage that illustrates the utility model one preferred embodiment is controlled.
Fig. 3 is a schematic diagram, and it illustrates the output waveform schematic diagram of the circuit of power factor correction of tool input voltage control of the present utility model.
Embodiment
Please refer to Fig. 2, the block schematic diagram of the circuit of power factor correction that its tool input voltage that illustrates the utility model one preferred embodiment is controlled.As shown in the figure, the circuit of power factor correction of tool input voltage control of the present utility model comprises: an inductor 10; One detecting voltage device 20; One circuit of power factor correction 30; One switch 40; One rectifier 50; And one capacitor 60 combine.
Wherein, an end of this inductor 10 is coupled to a power input (Vi), and in order to store electrical energy, only this is that general power supply unit is known, so do not intend giving unnecessary details at this.
One end of this detecting voltage device 20 is coupled to this inductor 10 and this power input, and it has a default value, can detect the accurate position of an input voltage.Wherein, the default value of this detecting voltage device 20 can be the 1-50% of input voltage.This detecting voltage device 20 then can be the loop that is made of divider resistance such as but not limited to Zener diode (Zenerdiode) circuit, an operation amplifier circuit (OPAmp) or, in order to detect the accurate position of this input voltage (Vi).
One end of this circuit of power factor correction 30 is coupled to the output of this detecting voltage device 20, and it can control the unlatching of this switch 40 or close according to the output of this detecting voltage device 20.
This switch 40 is to be one or three end assemblies, be for example and without limitation to a N channel enhancement mode metal oxidation half-court effect transistor (N-channel MOSFET) or P channel enhancement mode metal oxidation half-court effect transistor (P-channel MOSFET), be to be that example is illustrated in the present embodiment with N channel enhancement mode metal oxidation half-court effect transistor (N-channel MOSFET), only have the knack of this technology personage when knowing, when it was P channel enhancement mode metal oxidation half-court effect transistor (P-channelMOSFET), its control signal will be for anti-phase.Wherein, this first end is that this burning half field effect is answered transistor drain (Drain), and this second end is that this burning half field effect is answered transistorized grid (Gate), and the 3rd end is that this burning half field effect should transistorized source electrode (Source).
In addition, circuit of power factor correction of the present utility model further has a bridge rectifier 80, it is to be serially connected with between this power input and this detecting voltage device 20, and the detecting voltage point of this detecting voltage device 20 can be located at before or after this bridge rectifier 80.
Please refer to Fig. 3, it illustrates the output waveform schematic diagram of the circuit of power factor correction of tool input voltage control of the present utility model.As shown in the figure, the circuit of power factor correction of tool input voltage control of the present utility model is when running, when the accurate position of this input voltage (Vi) is lower than this default value (for example be lower than input voltage (Vi) 50%), the output of this detecting voltage device 20 can't this circuit of power factor correction 30 of activation, therefore, this circuit of power factor correction 30 will be controlled this switch 50 and stop to switch; When the accurate position of this input voltage (Vi) is higher than the default value (for example be higher than input voltage (Vi) 51%) of this detecting voltage device 20, the output of this detecting voltage device 20 will this circuit of power factor correction 30 of activation, makes the control signal of these circuit of power factor correction 30 output square wave patterns and makes this switch 50 begin to switch.Therefore, in (during being input voltage (Vi)=0-49%) during the low input, this circuit of power factor correction 30 can't be exported the control signal of square wave pattern, that is this switch 50 is for cutting out, and therefore, it can't have big input current.Therefore, the circuit of power factor correction of tool input voltage control of the present utility model really can improve the shortcoming of known active circuit of power factor correction and tool progressive.
So, via enforcement of the present utility model, it has a detecting voltage device, in the time of can being higher than this default value in the accurate position of input voltage, this circuit of power factor correction is just exported control signal makes this switch begin to switch, the problem of the big input current that is caused during with the reduction low input is to improve the shortcoming of known active power correction circuit.
What the utility model disclosed is preferred embodiment, the change of every part or modification and come from technological thought of the present utility model and be have the knack of this technology the people was easy to know by inference, all do not take off patent right category of the present utility model.
Claims (8)
1. the circuit of power factor correction of tool input voltage control is characterized in that it has:
One inductor, the one end is coupled to a power input;
One detecting voltage device, one end are coupled to this inductor and this power input, and it has a default value to detect the accurate position of an input voltage;
One circuit of power factor correction, the one end is coupled to the output of this detecting voltage device;
One switch is to be one or three end assemblies, and its first end is coupled to the other end of this inductor, and second end is coupled to the output of this circuit of power factor correction, and the 3rd end couples ground connection behind another power input;
One rectifier, one end are coupled to first end of this inductor and this switch; And
One capacitor, the one end is coupled to the other end of this rectifier, and the other end is ground connection then.
2. as the circuit of power factor correction of claim 1 a described tool input voltage control, it is characterized in that wherein this switch is a burning half-court effect transistor.
3. as claim 2 circuit of power factor correction that described tool input voltage is controlled, it is characterized in that wherein this burning half-court effect transistor is a N channel enhancement mode metal oxidation half-court effect transistor or P channel enhancement mode metal oxidation half-court effect transistor.
4. as claim 3 circuit of power factor correction that described tool input voltage is controlled, it is characterized in that, wherein this first end is that this burning half field effect is answered transistor drain, this second end is that this burning half field effect is answered transistorized grid, and the 3rd end is that this burning half field effect should transistorized source electrode.
5. as the circuit of power factor correction of the described tool input voltage control of claim 1, it is characterized in that wherein this detecting voltage device is the loop that a Zener diode circuit, an operation amplifier circuit or are made of divider resistance.
6. as the circuit of power factor correction of claim 5 a described tool input voltage control, it is characterized in that wherein the default value of this detecting voltage device is the 1-50% of input voltage.
7. as the circuit of power factor correction of claim 1 a described tool input voltage control, it is characterized in that it further has a bridge rectifier, it is to be serially connected with between this power input and this detecting voltage device.
8. as the circuit of power factor correction of claim 7 a described tool input voltage control, it is characterized in that wherein the detecting voltage of this detecting voltage device point is located at before or after this bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201157097U CN2907074Y (en) | 2006-05-31 | 2006-05-31 | Power factor correction circuit with input voltage control function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201157097U CN2907074Y (en) | 2006-05-31 | 2006-05-31 | Power factor correction circuit with input voltage control function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2907074Y true CN2907074Y (en) | 2007-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201157097U Expired - Fee Related CN2907074Y (en) | 2006-05-31 | 2006-05-31 | Power factor correction circuit with input voltage control function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2907074Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8102160B2 (en) | 2007-04-26 | 2012-01-24 | Samsung Electronics Co., Ltd. | Saturation preventing power factor improving method and apparatus |
-
2006
- 2006-05-31 CN CNU2006201157097U patent/CN2907074Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8102160B2 (en) | 2007-04-26 | 2012-01-24 | Samsung Electronics Co., Ltd. | Saturation preventing power factor improving method and apparatus |
| CN101295923B (en) * | 2007-04-26 | 2012-07-11 | 三星电子株式会社 | Saturation preventing power factor improving method and apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHICONY POWER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: HIPRO ELECTRONICS CO.,LTD. Effective date: 20100505 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100505 Address after: Taiwan County, Taipei, China Patentee after: Chicony Power Technology Co., Ltd. Address before: Taiwan County, Taipei, China Patentee before: Gaoxiao Electronic Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070530 Termination date: 20120531 |