DE3300669C2 - Transformerless power supply circuit - Google Patents
Transformerless power supply circuitInfo
- Publication number
- DE3300669C2 DE3300669C2 DE3300669A DE3300669A DE3300669C2 DE 3300669 C2 DE3300669 C2 DE 3300669C2 DE 3300669 A DE3300669 A DE 3300669A DE 3300669 A DE3300669 A DE 3300669A DE 3300669 C2 DE3300669 C2 DE 3300669C2
- Authority
- DE
- Germany
- Prior art keywords
- power supply
- input
- supply circuit
- output
- rectifier
- 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
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
-
- 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
- H02M11/00—Power conversion systems not covered by the preceding groups
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/05—Capacitor coupled rectifiers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Die Stromversorgungsschaltung besteht aus einem Impedanzglied (4), einem ersten Gleichrichter (3), einem ersten Glättungskondensator (5), einem Zerhacker (7), einem Piezokoppler (13), einem zweiten Gleichrichter (16), einem zweiten Glättungskondensator (17) und einem Spannungsstabilisator (18, 19). Die an Eingangsklemmen (1, 2) angelegte Netzspannung wird geteilt, gleichgerichtet und geglättet, sodann in eine Wechselspannung umgeformt, mittels des Piezokopplers (13) galvanisch trennend übertragen und schließlich wieder gleichgerichtet, geglättet und stabilisiert.The power supply circuit consists of an impedance element (4), a first rectifier (3), a first smoothing capacitor (5), a chopper (7), a piezo coupler (13), a second rectifier (16), a second smoothing capacitor (17) and a voltage stabilizer (18, 19). The mains voltage applied to input terminals (1, 2) is divided, rectified and smoothed, then converted into an alternating voltage, transmitted in an electrically isolating manner by means of the piezo coupler (13) and finally rectified, smoothed and stabilized again.
Description
33 OO33 OO
tet wie folgt:tet as follows:
Die an die Eingangsklemmen 1, 2 angelegte Netzwechselspannung wird durch einen Spannungsteiler, der aus dem !mpedanzglied 4 und der an den Gleichrichter 3 angeschlossenen Last besteht, auf einen niedrigen Wert geteilt, gleichgerichtet und geglättet Die so entstehende Gleichspannung wird durch den Zerhacker 7 in eine rechteckförmige Pulsspannung mit einem Impuls^Pausen-Verhältnis von etwa 1 :1 umgeformt wobei die Zerhacker-Frequenz wenigstens annähernd gleich groß ist wie die Resonanzfrequenz des Piezokopplers 13 und in der Größenordnung von 90 kHz liegt Der Piezokoppler 13 überträgt diese Wechselspannung unter galvanischer Trennung annähernd im Verhältnis 1:1. Anschließend wird die Wechselspannung wieder gleichgerichtet geglättet und stabilisiert An den Ausgangsklemmen 20,21 steht eine Gleichspannung von z. B. 5, 10 oder 15 Volt zur Speisung von Kleinverbrauchern, vorzugsweise von statischen Elektrizitätszählern und statischen Tarifgeräten, zur Verfugung. Die Kopplung Ober den Piezokoppler 13 ist lose, d. h. bei Leerlauf und bei Kurzschluß an seinem Ausgang 14,15 ist an seinem Eingang 11,12 das gleiche Ersatzschaltbild gültig. Der Eingangsstrom der Stromversorgungsschaltung ist daher von der an diese angeschlossenen Last unabhängig.The AC mains voltage applied to input terminals 1, 2 is generated by a voltage divider, which is made up of the impedance element 4 and which is sent to the rectifier 3 connected load exists, divided to a low value, rectified and smoothed The resulting DC voltage is converted by the chopper 7 into a square-wave pulse voltage with a pulse ^ pause ratio deformed by about 1: 1 with the chopper frequency being at least approximately the same like the resonance frequency of the piezocoupler 13 and is of the order of 90 kHz. The piezocoupler 13 transmits this alternating voltage with galvanic isolation in an approximately 1: 1 ratio. Afterward the AC voltage is rectified, smoothed and stabilized at the output terminals 20, 21 is a DC voltage of z. B. 5, 10 or 15 volts to power small consumers, preferably from static electricity meters and static tariff devices, are available. The coupling via the piezo coupler 13 is loose, i.e. H. when idling and when there is a short circuit at its output 14,15, this is at its input 11,12 same equivalent circuit diagram applies. The input current to the power supply circuit is therefore different from that to it connected load independently.
Zur Erhöhung der verfügbaren Ausgangsleistung kann zwischen dem Zerhacker 7 und dem Gleichrichter 16 ein weiterer Piezokoppler angeordnet werden. Gemäß der F i g. 2 wird ein solcher zusätzlicher Piezokoppler 13' vorteilhaft im Gegentaktbetrieb angesteuert. Dabei sind die Eingangselektroden 11 und 11Γ der Pkzokoppler 13 und 13' mit dem Ausgangsancschluß 9 des Zerhackers 7 verbunden. Die Eingangselektrode 12 des Piezokopplers 13 ist an den Anschluß 10 (Bezugspotential) und die Eingangselektrode 12' des Piezokopplers 13' an den Anschluß 8 (positives Potential) geschaltet. Die Ausgangselektroden 14 und 14' sowie 15 und 15' sind jeweils miteinander und mit einem Anschluß des Gleichrichters 36 verbunden. Die Gegeiiitaktansteuerung ergibt einen besseren Übertragungswirkungsgrad als die Parallelschaltung zweier Piezokoppler.To increase the available output power, between the chopper 7 and the rectifier 16 another piezo coupler can be arranged. According to FIG. 2 becomes such an additional piezo coupler 13 'advantageously driven in push-pull operation. The input electrodes 11 and 11Γ are the Pkzo couplers 13 and 13 'are connected to the output terminal 9 of the chopper 7. The input electrode 12 of the Piezo coupler 13 is connected to terminal 10 (reference potential) and the input electrode 12 'of the piezo coupler 13 'connected to terminal 8 (positive potential). The output electrodes 14 and 14 'as well as 15 and 15' are each connected to one another and to one terminal of the rectifier 36. The counter-clock control results in a better transmission efficiency than the parallel connection of two piezocouplers.
Um eine Spannungsuntersetzung zu erzielen, können die Eingangselektrodenpaare 11,12 und 111', 12' der beiden Piezokoppler 13, 13' in Reihe und die Ausgangselektrodenpaare 14, 15 und 14', 15' parallel geschaltet werden.In order to achieve a voltage reduction, the input electrode pairs 11, 12 and 111 ', 12' of the two Piezo coupler 13, 13 'in series and the output electrode pairs 14, 15 and 14', 15 'connected in parallel will.
Zum gleichen Zweck kann ein einziger, gemäß der F i g. 3 modifizierter Piezokoppler 28 verwendet werden, der mehrere Eingangselektrodenpaare 29, 30 bzw. 31,32 bzw. 33,34 und ein einziges Ausgangselektrodenpaar 35, 36 aufweist. Dabei sind die Eingangselektrodenpaare elektrisch in Reihe geschaltet, d. h'. die erste obere Elektrode 29 ist mit dem Ausgangsanschluß 9 des Zerhackers 7, die erste untere Elektrode 30 mit der zweiten oberen Elektrode 31, die zweite untere Elektrode 32 mit der dritten oberen Elektrode 33 und die dritte untere Elektrode 34 mit dem Anschluß 10 des Zerhakkers 7 verbunden.For the same purpose, a single, according to FIG. 3 modified piezo coupler 28 can be used, which has a plurality of input electrode pairs 29, 30 or 31, 32 or 33, 34 and a single output electrode pair 35, 36. The input electrode pairs are electrically connected in series, i. H'. the first upper electrode 29 is connected to the output terminal 9 of the chopper 7, the first lower electrode 30 is connected to the second upper electrode 31, the second lower electrode 32 is connected to the third upper electrode 33 and the third lower electrode 34 is connected to the terminal 10 of the chopper 7 tied together.
Bei Verwendung zweier Piezokoppler 13,13', die eingangsseitig in Reihe oder parallel geschaltet sind, ist es auch möglich, gemäß der F i g. 4 ihre Ausgangse'ektrodenpaare 14,15 und 14', 15' in Reihe mit den Eingangsklemmen des Gleichrichters 16 zu verbinden, so daß sich die Ausgangsspannungen der beiden Piezokoppler 13, 13' addieren. Dabei können zwei in Reihe geschaltete Glättungskondensatoren 37, 38 an die Ausgangsklemmen des Gleichrichters 16 angeschlossen und der VerbindunesDunkt der beiden Glättungskondensatoren 37, 38 mit dem Verbindungspunkt der beiden Ausgangselektroden 14, 14' der Piezokoppler 13, 13' sowie mit dem Bezugspotential der Stromversorgungsschaltung verbunden werden. Ober dem Glättungskondensator 37 kann daan eine gegenüber dem Rezugspotential positive und über dem Glättungskondensator 38 eine negative Speisespannung abgegriffen werden.When using two piezo couplers 13, 13 ', the input side are connected in series or in parallel, it is also possible, according to FIG. 4 their pairs of output electrodes 14,15 and 14 ', 15' to be connected in series with the input terminals of the rectifier 16, so that add the output voltages of the two piezo couplers 13, 13 '. Two can be connected in series Smoothing capacitors 37, 38 are connected to the output terminals of the rectifier 16 and the connection point of the two smoothing capacitors 37, 38 with the connection point of the two output electrodes 14, 14 'of the piezo coupler 13, 13' and with the reference potential of the power supply circuit get connected. Above the smoothing capacitor 37, a positive potential can be applied to the reference potential and a negative supply voltage can be tapped across the smoothing capacitor 38.
Die beschriebene Stromversorgungsschaltung benötigt keinen Transformator, ist einfach und erfordert infolge der sehr geringen Bauhöhe des Piezokopplers und der geringen Anzahl elektrischer und elekronischer Bauteile wenig Raum.The power supply circuit described does not require a transformer, is simple and consequently requires the very low overall height of the piezo coupler and the small number of electrical and electronic components Components little space.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (5)
anordung verwendet wird. Dabei ist auch eine piezo- Der Zerhacker 7 besteht im dargestellten Beispiel ausThere is already such a power supply circuit with the two connections of the smoothing capacitor without transformers known (DE-OS 31 23 104), connected at 17 and on the output side with output terminals 20,21 of the relay power supply circuit for switching loads on and off,
arrangement is used. The chopper 7 consists of in the example shown
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH6963/82A CH658960A5 (en) | 1982-11-30 | 1982-11-30 | TRANSFORMERLESS POWER SUPPLY CIRCUIT. |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3300669A1 DE3300669A1 (en) | 1984-05-30 |
DE3300669C2 true DE3300669C2 (en) | 1986-11-27 |
Family
ID=4317786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3300669A Expired DE3300669C2 (en) | 1982-11-30 | 1983-01-11 | Transformerless power supply circuit |
Country Status (2)
Country | Link |
---|---|
CH (1) | CH658960A5 (en) |
DE (1) | DE3300669C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5991167A (en) * | 1997-03-12 | 1999-11-23 | U.S. Philips Corporation | DC to DC power converter including synchronous output rectifier circuit |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19603634A1 (en) * | 1996-02-01 | 1997-08-07 | Siemens Ag | DC-DC converter with piezoelectric converter |
TW356618B (en) * | 1997-01-16 | 1999-04-21 | Nippon Electric Co | AC/DC converter with a piezoelectric transformer |
JP4312021B2 (en) | 2003-10-06 | 2009-08-12 | 株式会社タムラ製作所 | Piezoelectric transformer driving device and piezoelectric transformer driving method |
CN102520241B (en) * | 2011-12-26 | 2014-07-02 | 武汉盛帆电子股份有限公司 | Three-phase charge-controlled electric energy meter based on resistance-capacitance voltage reduction and low-voltage direct-current/direct-current (DC/DC) power supply |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2057805B (en) * | 1979-08-07 | 1983-11-02 | Standard Telephones Cables Ltd | Piezo-electric coupling devices |
DE2949347C2 (en) * | 1979-12-07 | 1985-02-07 | Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch | Transformerless power supply |
-
1982
- 1982-11-30 CH CH6963/82A patent/CH658960A5/en not_active IP Right Cessation
-
1983
- 1983-01-11 DE DE3300669A patent/DE3300669C2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5991167A (en) * | 1997-03-12 | 1999-11-23 | U.S. Philips Corporation | DC to DC power converter including synchronous output rectifier circuit |
Also Published As
Publication number | Publication date |
---|---|
DE3300669A1 (en) | 1984-05-30 |
CH658960A5 (en) | 1986-12-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |