CN2457782Y - Multi-way isolation DC change powre source for instrument - Google Patents
Multi-way isolation DC change powre source for instrument Download PDFInfo
- Publication number
- CN2457782Y CN2457782Y CN 00224340 CN00224340U CN2457782Y CN 2457782 Y CN2457782 Y CN 2457782Y CN 00224340 CN00224340 CN 00224340 CN 00224340 U CN00224340 U CN 00224340U CN 2457782 Y CN2457782 Y CN 2457782Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- utility
- model
- isolation
- power source
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model relates to a multi-way isolation direct current change power source for instruments. A portable precision electronic device changes a set of battery voltage into multi-way and isolation voltage through the multi-way isolation direct current change power source for instruments. The utility model has the technical proposal that an inductance energy storage element L in the typical application of a general switch type direct current conversion chip is changed into a high frequency transformer T; the utility model has the functions of change energy storage of the power source and the isolation shunting; noise interference is obviously reduced after the structure of a transformer is especially treated; accordingly, the power supply can satisfy the requirement that the portable precision electronic device which has 10uV resolution and a 4.5 digits display dial requires the power supply. The circuit of the power supply has the advantages of simple structure and low noise. The utility model has been successfully used for hand-held check meters which have double 4.5 digits display dials and the efficiency is 82 %.
Description
The utility model is a kind of switching mode multichannel isolated DC converting power source for portable precision electronic device use.
For some complicated portable electronic instruments, the general requirement becomes several groups of DC power supply of isolating mutually with a Battery pack voltage transformation, and requires conversion efficiency height, interference noise low.Situation from " instrumental technique " 91 years the 1st phases " a kind of field apparatus power supply of practicality " and the data introductions such as " selections of DC converting device the portable apparatus " of " automation and instrument " 99 year the 5th phase, the small-power DC converter is only limited to the lifting and the reversed polarity of single voltage usually, can not isolate along separate routes.The switching mode DC converter that those can be isolated along separate routes, circuit are complicated, and the also bad solution of noise problem.To reach multichannel isolation, high efficiency, these requirements of low noise simultaneously, still have a lot of difficulties.
The purpose of this utility model provide a kind of simple in structure, noise is low, efficient is high be applicable to accurate portable instrument with a Battery pack voltage V
0Be transformed into the DC power supply that multichannel is isolated mutually.
The purpose of this utility model is achieved in that with switching mode dc-dc conversion chip common, that the inductive energy storage element is arranged in the typical case uses, the MC34063 that is introduced as " application of electronic technology " 93 years the 5th phases " principle and the application of integrated switch power controller MC34063 ", the inductive energy storage element L that the chip typical case uses in (Fig. 1) is replaced by high frequency transformer T (Fig. 2), and on the layout of each winding of transformer, is intended to reduce the very arrangement of coupling capacitance between winding.
Below in conjunction with example utility model is described further:
Fig. 1 is that switching mode DC converting chip typical case uses---the schematic diagram of boosting inverter all has introduction in the operation instructions of chip.
Fig. 2 is a multichannel isolated DC converting power source schematic diagram.
This power supply can reach higher conversion efficiency with switching mode conversion chip (as MC34063).The inductive energy storage element L that the chip typical case uses in (as boosting inverter) is replaced by high frequency transformer T, this moment, transformer was both born the energy-storage function of former inductance L, the advantage that has kept the former DC converting of chip, bring into play transformer again and isolate function with transformation along separate routes, make this power supply obtain multichannel and isolate output, circuit is simple.Common available V
1Make the bigger main power source of load current, available V
2, V
3Power supply as instrument sensing, gauge outfit part.The shortcoming of switching mode dc transformating power is that noise is big, and this one damages greatly beyond doubt for the portable precision electronic device that uses the switching mode dc transformating power, adopts existing electrostatic screen, recommends conversion, measure such as ground connection all can not deal with problems.The utility model is between control high frequency transformer each winding and the suitable distance between winding and magnetic core, thereby has controlled the impedance of coupling circuit between each winding, and noise is controlled within the scope that accuracy of instrument requires the influence of instrument detecting.The precision difference of electronic instrument, to the requirement difference of each road power supply, the distance between each winding of transformer is also different.Ripple and stability as for each road output voltage of converter self adopt existing filtering, voltage stabilizing technique just can reach the requirement of instrument.
The utility model with the MC34063 chip manufacturing instrument with multichannel isolated variable power supply, be successfully used on a kind of novel portable electronics tester, it is four semi-digital-display-meter's heads of 10uV that this tester has two resolving powers.V
0=9.6VDC, V
1=24DC25mA, V
2=V
3=8.2VDC3mA, conversion efficiency 82%, V
1, V
2, V
3Output ripple all less than 0.5mV, overall dimension is 70 * 24 * 18mm
3
Dc transformating power provided by the utility model, have simple in structure, volume is little, noise jamming Low, conversion efficiency advantages of higher are for the Portable precise electronics that requires to be equipped with multichannel isolated DC power supply Instrument is a kind of comparatively ideal Power Supply fittings, is conducive to instrument and meter towards the miniaturized intelligent future development.
Claims (2)
1, a kind of by regular tap type DC converting integrated chip (as MC34063), timing capacitor C
THigh frequency transformer T, current-limiting resistance R
SC, sustained diode
1, rectifier diode D
2, D
3, voltage stabilizing didoe D
4, D
5, inductance L
4And the instrument that some resistance capacitance elements are formed is characterized in that the inductive energy storage element L in the regular tap type DC converting integrated chip typical case application is replaced by high frequency transformer T with multichannel isolated DC converting power source.
2, power supply according to claim 1, its feature also are when between each winding of high frequency transformer T one bigger suitable spacing is arranged, and to increase the impedance of coupling circuit between each winding, guarantee the isolation quality of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00224340 CN2457782Y (en) | 2000-03-13 | 2000-03-13 | Multi-way isolation DC change powre source for instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00224340 CN2457782Y (en) | 2000-03-13 | 2000-03-13 | Multi-way isolation DC change powre source for instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2457782Y true CN2457782Y (en) | 2001-10-31 |
Family
ID=33588721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00224340 Expired - Fee Related CN2457782Y (en) | 2000-03-13 | 2000-03-13 | Multi-way isolation DC change powre source for instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2457782Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290980A (en) * | 2011-08-12 | 2011-12-21 | 刘昭利 | Universal direct current (DC) voltage boosting and stabilizing device made from MC34063 integrated circuit (IC) |
| CN103840658A (en) * | 2014-03-19 | 2014-06-04 | 成都引众数字设备有限公司 | Power switch circuit of time calibration instrument |
-
2000
- 2000-03-13 CN CN 00224340 patent/CN2457782Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290980A (en) * | 2011-08-12 | 2011-12-21 | 刘昭利 | Universal direct current (DC) voltage boosting and stabilizing device made from MC34063 integrated circuit (IC) |
| CN103840658A (en) * | 2014-03-19 | 2014-06-04 | 成都引众数字设备有限公司 | Power switch circuit of time calibration instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Moradewicz et al. | Contactless energy transfer system with FPGA-controlled resonant converter | |
| CN102082512A (en) | Driver for piezoelectric actuator | |
| CN101821930B (en) | DC transformer | |
| CN208984705U (en) | A kind of device of non-contact measurement sinusoidal current signal frequency and peak value | |
| CN102315778B (en) | Self-excitation push-pull type converter | |
| US6252383B1 (en) | Buck and boost power converters with non-pulsating input and output terminal currents | |
| CN104459274A (en) | Measuring method for voltage coefficient of high voltage standard capacitor | |
| CN101373210B (en) | Device for measuring magnetic element loss | |
| CN2457782Y (en) | Multi-way isolation DC change powre source for instrument | |
| CN202217015U (en) | Three-phase electric energy metering device | |
| CN1168992C (en) | D.C. current sensing device | |
| CN105375761B (en) | The loop control circuit of inverse-excitation type switch power-supply a kind of and apply its inverse-excitation type switch power-supply | |
| CN2132193Y (en) | Electronic type parity checker for mutual-inductor | |
| CN103760409A (en) | Voltage transducer | |
| CN103630735A (en) | Voltage slope change detection circuit and method | |
| CN200989938Y (en) | Electric power type all automatic mutual inductor correcting device | |
| CN201051151Y (en) | A magnetic resonance water finder | |
| CN213181745U (en) | Pole-mounted voltage sensor structure | |
| Schellmanns et al. | Representing electrical behaviour of transformers by lumped element circuits: a global physical approach | |
| CN103197136A (en) | Ampere meter for air-core transformer and control method thereof | |
| CN101477182A (en) | Portable alternating field measuring instrument based on magnetostriction principle | |
| CN87202552U (en) | Adjustable mutual-inductor | |
| CN2583682Y (en) | Direct current sensor | |
| CN2143356Y (en) | Voltage mutual inductor for instruments | |
| CN217769912U (en) | Resonant booster circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |