CN110303758A - A kind of high-voltage power apparatus - Google Patents
A kind of high-voltage power apparatus Download PDFInfo
- Publication number
- CN110303758A CN110303758A CN201810229002.6A CN201810229002A CN110303758A CN 110303758 A CN110303758 A CN 110303758A CN 201810229002 A CN201810229002 A CN 201810229002A CN 110303758 A CN110303758 A CN 110303758A
- Authority
- CN
- China
- Prior art keywords
- voltage
- piezoelectric transformer
- capacitor
- resistor
- output
- Prior art date
- 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.)
- Withdrawn
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 26
- 238000009499 grossing Methods 0.000 claims abstract description 8
- 230000005669 field effect Effects 0.000 claims description 13
- 230000008859 change Effects 0.000 abstract description 3
- 230000010355 oscillation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/004—Electric or hydraulic features of drives
- B41F13/0045—Electric driving devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F16/00—Transfer printing apparatus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to a kind of high-voltage power apparatus, including a driving unit, a piezoelectric transformer and a smoothing processing unit, piezoelectric transformer described in the output driving of the driving unit, smoothing processing unit includes a high-voltage diode, one resistance and a first capacitor, the anode of high-voltage diode connect the output end of the piezoelectric transformer, and the cathode of high-voltage diode is separately connected first resistor and first capacitor, first capacitor ground connection, the other end of first resistor are output end.The present invention generates the signal of driving frequency oscillation by the driving unit, the piezoelectric transformer exports ceiling voltage under driving signal with resonance frequency, the voltage for the undesire frequency that piezoelectric transformer generates is suppressed to the voltage lower than resonance frequency by first resistor, to reduce the distortion factor of output voltage, and output voltage influenced by the external loading of first resistor and temperature change etc. it is smaller, stable output voltage control is realized, image transfer quality is promoted.
Description
Technical field
The present invention relates to a kind of high-voltage power apparatus, belong to field of power supplies.
Background technique
In the imaging transfer process of laser printer or duplicator, realized by applying a voltage on transfer roll
The transfer of image.In order to obtain preferable transferring effect, need to impose high voltage (number higher than the voltage of source power supply on transfer roll
The voltage of hectovolt spy) and about 10 μ A electric current.
In order to generate this high voltage, conventionally used wirewound electromagnetic transformer.However, electromagnetic transformers volume is big
And weight weight, become the obstacle for reducing the size and weight of high-voltage power apparatus.Therefore, it begins one's study using piezoelectric transformer
(piezoelectric ceramic transformer).Using piezoelectric transformer, high voltage can be generated with efficiency more higher than electromagnetic transformers, because
This, piezoelectric transformer has the advantages that the size and weight that can reduce high-voltage power apparatus.
In the circuit design of common piezoelectric transformer type high-voltage power apparatus, the voltage of output is controlled according to frequency
System, however, generating undesire frequency in resonant frequency range in conventional circuit design.When generating undesire frequency, response
In the variation of load, so that output voltage becomes unstable, therefore, it is difficult to obtain the image of high quality.It is posted therefore, it is necessary to reduce
Raw frequency.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of high-voltage power apparatus, are keeping pressure as much as possible
The voltage at undesire frequency is reduced while voltage at the resonance frequency of piezoelectric transformer, to promote the quality of transferred image.
Technical scheme is as follows:
A kind of high-voltage power apparatus, including a driving unit, a piezoelectric transformer and a smoothing processing unit, the driving are single
Piezoelectric transformer described in the output driving of member, the smoothing processing unit include a high-voltage diode, a first resistor and one
First capacitor, the anode of the high-voltage diode connect the output end of the piezoelectric transformer, the cathode of the high-voltage diode
It is separately connected the first resistor and first capacitor, the first capacitor ground connection, the other end of the first resistor is output end.
More preferably, the driving unit includes a voltage controlled oscillator, a field-effect tube, an inductance and one second capacitor,
Electric current is inputted from the voltage controlled oscillator, and the output end of the voltage controlled oscillator connects the pole G of the field-effect tube, the field effect
Should the pole D of pipe be separately connected the inductance and second capacitor, the inductance accesses power Vcc, second capacitor and
The S of the field-effect tube is extremely grounded.
More preferably, the output end of the piezoelectric transformer is also connected with a reverse protection diode.
The invention has the following beneficial effects:
The present invention by the driving unit generate driving frequency oscillation signal, the piezoelectric transformer under driving signal with
Resonance frequency exports ceiling voltage, and the voltage for the undesire frequency that piezoelectric transformer generates is suppressed to lower than resonance frequency by first resistor
The voltage of rate, to reduce the distortion factor of output voltage.And output voltage is by the external loading and temperature change of first resistor
Deng influence it is smaller, realize stable output voltage control, promote image transfer quality.
Detailed description of the invention
Fig. 1 is electrical schematic diagram of the invention.
Appended drawing reference indicates in figure are as follows:
10, driving unit；20, piezoelectric transformer；30, smoothing processing unit；11, voltage controlled oscillator；12, field-effect tube；13, electric
Sense；14, the second capacitor；31, high-voltage diode；32, first resistor；33, first capacitor；34, reverse protection diode；41, it transports
Calculate amplifier；42, second resistance；43, third capacitor.
Specific embodiment
It is next in the following with reference to the drawings and specific embodiments that the present invention will be described in detail.
Referring to Fig. 1, a kind of high-voltage power apparatus, including a driving unit 10, a piezoelectric transformer 20 and one are smooth
Processing unit 30, piezoelectric transformer 20 described in the output driving of the driving unit 10, the smoothing processing unit 30 include one
The anode of high-voltage diode 31, a first resistor 32 and a first capacitor 33, the high-voltage diode 31 connects the piezoelectricity
The output end of transformer 20, the cathode of the high-voltage diode 31 are separately connected the first resistor 32 and first capacitor 33, institute
The ground connection of first capacitor 33 is stated, the other end of the first resistor 32 is output end.The output end of the piezoelectric transformer 20 also connects
Connect a reverse protection diode 34.
The driving unit 10 includes a voltage controlled oscillator 11, a field-effect tube 12, an inductance 13 and one second capacitor
14, electric current is inputted from the voltage controlled oscillator 11, and the output end of the voltage controlled oscillator 11 connects the G of the field-effect tube 12
Pole, the pole D of the field-effect tube 12 are separately connected the inductance 13 and second capacitor 14, and the inductance 13 accesses power supply
The S of Vcc, second capacitor 14 and the field-effect tube 12 is extremely grounded.
In addition, frequency scan time is by operational amplifier 41, second resistance 42, the integrating circuit that third capacitor 43 forms
The input difference voltage of time constant and operational amplifier 41 determines.
The driving unit 10 is generated for driving the driving frequency of the piezoelectric transformer 20 (to vibrate with driving frequency
Signal), the piezoelectric transformer 20 exports ceiling voltage with scheduled resonance frequency, and the first resistor 32 is by piezoelectricity transformation
The voltage for the undesire frequency that device 20 generates is suppressed to the voltage lower than resonance frequency, to reduce the distortion factor of output voltage.Institute
It states high-voltage diode 31 and first capacitor 33 forms current rectifying and wave filtering circuit, filter out output ripple and noise.
This circuit design can inhibit the reduction of the ceiling voltage at resonance frequency as much as possible.Moreover, output voltage by
The influence of the external loading of first resistor 32 and temperature change etc. is smaller, realizes stable output voltage control.This for
The image color for stablizing image forming apparatus also has contributed much.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (3)
1. a kind of high-voltage power apparatus, including a driving unit (10), a piezoelectric transformer (20) and a smoothing processing unit
(30), it is characterised in that: piezoelectric transformer (20) described in the output driving of the driving unit (10), the smoothing processing unit
It (30) include a high-voltage diode (31), a first resistor (32) and a first capacitor (33), the high-voltage diode (31)
Anode connect the output end of the piezoelectric transformer (20), the cathode of the high-voltage diode (31) is separately connected described first
Resistance (32) and first capacitor (33), first capacitor (33) ground connection, the other end of the first resistor (32) is output end.
2. a kind of high-voltage power apparatus according to claim 1, it is characterised in that: the driving unit (10) includes a pressure
Control oscillator (11), a field-effect tube (12), an inductance (13) and one second capacitor (14), electric current is from the voltage controlled oscillator
(11) it inputs, the output end of the voltage controlled oscillator (11) connects the pole G of the field-effect tube (12), the field-effect tube (12)
The pole D be separately connected the inductance (13) and second capacitor (14), the inductance (13) accesses power Vcc, described second
Capacitor (14) and the S of the field-effect tube (12) are extremely grounded.
3. a kind of high-voltage power apparatus according to claim 1, it is characterised in that: the output of the piezoelectric transformer (20)
End is also connected with a reverse protection diode (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810229002.6A CN110303758A (en) | 2018-03-20 | 2018-03-20 | A kind of high-voltage power apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810229002.6A CN110303758A (en) | 2018-03-20 | 2018-03-20 | A kind of high-voltage power apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110303758A true CN110303758A (en) | 2019-10-08 |
Family
ID=68073930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810229002.6A Withdrawn CN110303758A (en) | 2018-03-20 | 2018-03-20 | A kind of high-voltage power apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110303758A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1841226A (en) * | 2005-03-31 | 2006-10-04 | 佳能株式会社 | Power supply device and image forming apparatus having the same |
| CN1908823A (en) * | 2005-08-01 | 2007-02-07 | 佳能株式会社 | Image forming apparatus and power supply |
| CN102262370A (en) * | 2010-05-28 | 2011-11-30 | 佳能株式会社 | Power supply system and image forming apparatus |
-
2018
- 2018-03-20 CN CN201810229002.6A patent/CN110303758A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1841226A (en) * | 2005-03-31 | 2006-10-04 | 佳能株式会社 | Power supply device and image forming apparatus having the same |
| CN1908823A (en) * | 2005-08-01 | 2007-02-07 | 佳能株式会社 | Image forming apparatus and power supply |
| CN102262370A (en) * | 2010-05-28 | 2011-11-30 | 佳能株式会社 | Power supply system and image forming apparatus |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191008 |