WO2016128047A1 - Switched-mode power supply unit - Google Patents
Switched-mode power supply unit Download PDFInfo
- Publication number
- WO2016128047A1 WO2016128047A1 PCT/EP2015/052905 EP2015052905W WO2016128047A1 WO 2016128047 A1 WO2016128047 A1 WO 2016128047A1 EP 2015052905 W EP2015052905 W EP 2015052905W WO 2016128047 A1 WO2016128047 A1 WO 2016128047A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power supply
- switching power
- signal
- voltage
- primary
- Prior art date
Links
Classifications
-
- 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
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
Definitions
- the present invention relates to an intrinsically safe REG ⁇ tes switching power supply according to the preamble of claim 1.
- Intrinsically safe regulated switching power supplies for the generation of galvanically isolated intrinsically safe circuits are known from the prior art and generally have a primary side and a secondary side, with a primary side
- Primary voltage secondary clamping ⁇ voltage can be applied and the secondary side tapped.
- a regulated output voltage is provided by the switching power supply. From DE 10 2012 000 683 B4 a switching power supply is known, in which galvanic isolation is realized in the return channel by means of an opto-coupler ⁇ .
- the rated current is 1 mA to 4 mA.
- Switched-mode power supplies which are used for field devices in so-called HART multidrop operation, have an output current of 4 mA at an output voltage of 20 V, ie. H . always have an efficiency of Weni ⁇ ger than 50% - that such switching power supplies - without the convening z iehung further losses.
- An intrinsically safe controlled switching regulator with a primary ⁇ side and a secondary side at which the primary side a primary märschreib be applied and the secondary side a secondary voltage can be tapped is connected to at least one transformer for converting the primary voltage in the secondary voltage, a return channel with galvanic isolation for transmitting a remindkoppelsig- Nals with information about the amount of the secondary voltage to the primary side and a switching regulator, said remind ⁇ pelsignal is supplied to the primary voltage to the over ⁇ exchanger is characterized in that the galvanic isolation in the return channel with a Kapaz tuitive coupling and / or an inductive coupling is formed.
- the poor transmission ratio may return channel improves the ⁇ . Furthermore, the nonlinearities introduced by the optocoupler in the return channel can be avoided.
- a particularly simple transmission of the information about the magnitude of the secondary voltage to the primary side can be achieved if on the secondary side of a PWM circuit arrangement for generating a pulse width modulated signal is arranged as a feedback signal to which the secondary voltage is applied, and their output to the galvanic Separation is connected.
- a pulse width modulated signal as a feedback signal can be used by a correspondingly high frequency of the pulse width modulation, a very small capacity for the transmission of the feedback signal from the secondary side to the primary side.
- the acting on the secondary side capacitance it can be kept low.
- a high frequency pulse width modulation in comparison with a clock frequency of the switching power supply further comprises a ⁇ from reaching high dynamics of voltage regulation can be achieved.
- a capacitance for the signal transmission 0.5 nF, for example from a series connection of two capacitors per 1 nF.
- a coupling of the ground signal can in this embodiment, for example by means of a capacitance of 5 nF or a series connection of two capacitances ä 10 nF done.
- an inductive coupling may be provided.
- the PWM circuit arrangement may, for example, a three ⁇ ecksignalgenerator for generating a triangular signal aufwei ⁇ sen.
- the PWM circuit arrangement can have a comparator which is preferably implemented by an operational amplifier, to which the secondary voltage and the triangular signal are fed on the input side and to which the pulse-width-modulated signal can be tapped as feedback signal on the output side.
- a pulse width modulated ⁇ Sig nal can be generated, whose pulse width correlated to the amount of the seconding ⁇ därnaps. In this way, the information about the amount of secondary voltage can be easily fed back to the primary side.
- a signal matching circuit and / or a filter can be arranged on the primary side.
- Such Sig- nalanpassungsSchaltungen and / or filters can be formed suitable for Aufberei ⁇ processing of the data transmitted via the capacitive coupling ⁇ feedback signal.
- another comparator can be used as the signal adaptation circuit, which converts the optionally contaminated feedback signal back into a clean square-wave signal.
- a suitable filtering for example a first-order RC filter or an active filter
- the feedback signal processed in this way can be filtered by suitable filtering, for example a saline filter. len-key filter or a Butterworth filter.
- the feedback signal thus processed can be filtered to a DC voltage value which represents the level of the secondary voltage.
- the further processed feedback signal can then be fed to a switching regulator of the switching network ⁇ part, which controls a supply of the primary voltage to the transformer.
- the square wave signal generated by the signal processing may be fed directly to a microprocessor which measures the ON-time of the pulse width modulation underlying and outputting a secondary voltage reflecting the value on ei ⁇ ne digital-to-analog converter to the switching regulator.
- a microprocessor which measures the ON-time of the pulse width modulation underlying and outputting a secondary voltage reflecting the value on ei ⁇ ne digital-to-analog converter to the switching regulator.
- active filters may be advantageous when a signal with reduced noise is needed.
- the switching power supply may be designed especially with a Jacobtaktwand- ler, wherein the transmitter is in this case formed with two opposing primary windings which are connected wech ⁇ balance one another at one end with the primary voltage and at the other via switching means to a ground potential.
- Fig. 1 is a block diagram of a device according to the invention
- FIG. 1 shows a block diagram of an exemplary embodiment of a switched-mode power supply 1 according to the present application.
- the switching power supply 1 is formed in the present embodiment as a push-pull converter with a transformer 3, which is the primary side with a primary voltage V in acted upon. On the secondary side of the transformer 3, a secondary voltage V ou t can be tapped.
- the transformer 3 has a primary winding and ei ⁇ ne secondary winding, each having a center tap on. On the primary side, the center tap of the primary winding is connected to the primary voltage V in , wherein the primary winding can be connected to earth at the beginning and at the end via switching means 4.
- the switching means 4 are driven via a Heidelbergreg ⁇ ler, so that a time period 5, during which the Pri ⁇ märwood V ir, is connected via one or the other switching means 4 to the ground, is adjustable.
- a time period 5 during which the Pri ⁇ märwood V ir, is connected via one or the other switching means 4 to the ground, is adjustable.
- On the secondary side of the center tap of the secondary winding is connected to ground, said secondary winding start and end ⁇ is mutually connected to the anode of a diode in each case.
- the cathodes of the two diodes 8 are both connected to an output of the switched-mode power supply 1, to which the secondary voltage V ou t can be tapped.
- the two diodes 8 thus act as a rectifier ⁇ 7, so that on the output side of the switching power supply 1 a DC voltage can be tapped.
- the secondary voltage Vout is also fed to a PWM circuit 13 for generating a pulse width modulated feedback signal SR.
- the pulse width modulated feedback signal SR is generated in the present embodiment by means of a comparator 17, on the one hand, the secondary voltage V ou t and on the other hand, a triangular signal So, which is generated in a triangular signal generator 15, is supplied.
- the pulse width modulated feedback signal SR output side is picked up at the comparator 17 and ei ⁇ ner capacitive coupling 11, which in the present case by condensers ren realized is supplied.
- the transmitted feedback signal SR is supplied on the primary side ei ⁇ ner signal conditioning circuit 19, which is connected with a filter 21 in series.
- Signalanpassungs- circuit 19 is the transmitted feedback signal SR aufberei ⁇ tet and converted back into a clean square wave signal.
- the signal adaptation circuit 19 may be designed, for example, as a comparator.
- the signal matching circuit 19 is connected downstream of the filter 21, which may be configured both as a passive and as an active filter. Through the filter, the feedback signal SR is ge ⁇ filtered into a DC voltage value , which is supplied to the switching regulator 5.
- the signal conditioning circuit 19 and the filter 21 can also be realized with an operational amplifier.
- the treatedradkop ⁇ pelsignal SR can also be supplied to the microcontroller, which evaluates the feedback signal SR, and outputs a corresponding signal according to the ON-time of the pulse-width modulation via a digital-to-analog converter, which then supply the switching regulator 5 can be guided.
- the microcontroller and the Wegreg ⁇ ler 5 may be designed as an element that performs both tasks.
- generating the triangular signal SD for example, by integration of a signal generated in a rectangular signal generator 18, or else provided in other suitable manner.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2015/052905 WO2016128047A1 (en) | 2015-02-11 | 2015-02-11 | Switched-mode power supply unit |
DE112015006140.1T DE112015006140A5 (en) | 2015-02-11 | 2015-02-11 | Switching Power Supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2015/052905 WO2016128047A1 (en) | 2015-02-11 | 2015-02-11 | Switched-mode power supply unit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016128047A1 true WO2016128047A1 (en) | 2016-08-18 |
Family
ID=52472314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/052905 WO2016128047A1 (en) | 2015-02-11 | 2015-02-11 | Switched-mode power supply unit |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE112015006140A5 (en) |
WO (1) | WO2016128047A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020254421A1 (en) * | 2019-06-17 | 2020-12-24 | Tridonic Gmbh & Co Kg | Circuit with galvanic isolation and capacitive signal feedback |
CN114844519A (en) * | 2022-04-06 | 2022-08-02 | 杭州海康威视数字技术股份有限公司 | Isolating device for intrinsic safety circuit and non-intrinsic safety circuit |
US12255642B2 (en) | 2020-07-20 | 2025-03-18 | Rohm Co., Ltd. | Signal transmission device, electronic appliance, and vehicle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080192509A1 (en) * | 2007-02-13 | 2008-08-14 | Dhuyvetter Timothy A | Dc-dc converter with isolation |
WO2008114073A1 (en) * | 2007-03-22 | 2008-09-25 | Thomson Licensing | Apparatus for supplying isolated regulated dc power to electronics devices |
-
2015
- 2015-02-11 DE DE112015006140.1T patent/DE112015006140A5/en not_active Withdrawn
- 2015-02-11 WO PCT/EP2015/052905 patent/WO2016128047A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080192509A1 (en) * | 2007-02-13 | 2008-08-14 | Dhuyvetter Timothy A | Dc-dc converter with isolation |
WO2008114073A1 (en) * | 2007-03-22 | 2008-09-25 | Thomson Licensing | Apparatus for supplying isolated regulated dc power to electronics devices |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020254421A1 (en) * | 2019-06-17 | 2020-12-24 | Tridonic Gmbh & Co Kg | Circuit with galvanic isolation and capacitive signal feedback |
US12255642B2 (en) | 2020-07-20 | 2025-03-18 | Rohm Co., Ltd. | Signal transmission device, electronic appliance, and vehicle |
CN114844519A (en) * | 2022-04-06 | 2022-08-02 | 杭州海康威视数字技术股份有限公司 | Isolating device for intrinsic safety circuit and non-intrinsic safety circuit |
CN114844519B (en) * | 2022-04-06 | 2023-10-10 | 杭州海康威视数字技术股份有限公司 | Isolation device for intrinsic safety circuit and non-intrinsic safety circuit |
Also Published As
Publication number | Publication date |
---|---|
DE112015006140A5 (en) | 2017-11-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102012007477B4 (en) | Method for operating an LLC resonant converter for a lamp, converter and LED converter | |
DE10122534A1 (en) | Resonant converter | |
DE2935521A1 (en) | DC CONVERTER | |
DE4328458A1 (en) | Switched-mode voltage supply giving stabilised DC voltages - suppresses inductive voltage and current peaks, load-dependent switching frequency fluctuations and rectifier diode current resonances | |
DE102017106424B4 (en) | Power converter circuit with a main converter and an auxiliary converter | |
EP3114898B1 (en) | Led driver | |
DE102012111853B4 (en) | Switching power supply device and use of such | |
DE10020357A1 (en) | DC-DC converter | |
DE102017222265A1 (en) | DC converter | |
DE202017007564U1 (en) | amplifier circuit | |
DE10126925A1 (en) | Circuit arrangement with a control circuit | |
WO2016128047A1 (en) | Switched-mode power supply unit | |
DE102021203742A1 (en) | CURRENT MEASUREMENT DEVICE FOR SWITCHED POWER CONVERTERS AND CONTROL CIRCUIT FOR APPLICATION OF THE CURRENT MEASUREMENT DEVICE | |
DE3223409A1 (en) | FEEDING SYSTEM | |
DE10133865A1 (en) | Electrical circuitry | |
DE102012217732A1 (en) | Pulsed voltage transformer | |
DE102021100761A1 (en) | RESONANCE TOPOLOGY FOR A DC-AC INVERTER | |
AT516903B1 (en) | Circuit arrangement with transformer with center tap and measurement of the output voltage | |
EP0355415B1 (en) | Switching regulator | |
DE19515210A1 (en) | Switched mode power supply circuit for AC or DC supply network | |
DE2919905A1 (en) | Power supply including feedback transformer - which couples output back to primary-side pulse-width modulator, and receives meander-shaped voltage waveform | |
DE112016001109B4 (en) | RESONANCE CONVERTER WITH A CENTER-TAP TRANSFORMER | |
DE102016110427A1 (en) | Switching Power Supply | |
EP2128959A1 (en) | Voltage adapter | |
DE102015115481A1 (en) | Switching power supply apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15704521 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112015006140 Country of ref document: DE |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: R225 Ref document number: 112015006140 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15704521 Country of ref document: EP Kind code of ref document: A1 |