WO1999030408A1 - Kondensatornetzteil - Google Patents
Kondensatornetzteil Download PDFInfo
- Publication number
- WO1999030408A1 WO1999030408A1 PCT/EP1998/007183 EP9807183W WO9930408A1 WO 1999030408 A1 WO1999030408 A1 WO 1999030408A1 EP 9807183 W EP9807183 W EP 9807183W WO 9930408 A1 WO9930408 A1 WO 9930408A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- capacitor
- switching
- charging
- voltage
- switching means
- 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
- 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
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means 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
- 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
Definitions
- the invention relates to the field of power supplies for supplying electronic assemblies.
- the invention relates to a condenser power supply comprising a charging capacitor for charging a further capacitor (storage capacitor) for operating a current consumer, a rectifier arranged between the charging capacitor and the storage capacitor and a switching means arranged in terms of circuitry between the charging capacitor and the storage capacitor with a control input at which Control input, the outputs of a switching time determination element, which is acted upon with a reference voltage that is small compared to the AC line voltage, for determining the switching time for switching the switching means from a switch position charging the storage capacitor into a switch position interrupting the charging process, depending on the voltage present on the output side of the charging capacitor and a charging state determination element for determining the Charge state of the storage capacitor present.
- the invention further relates to a method for operating a capacitor power supply.
- Capacitor power supplies are often used to generate auxiliary power supplies that are not separated from the mains. Such auxiliary voltages are usually used to supply electronic assemblies, for example to supply the electronics used for speed control of drilling machines.
- the principle of a capacitor power supply is based on the cyclical recharging of the charging capacitor, which serves as a charge pump for the storage capacitor and charges the latter during each network cycle.
- a breakdown diode is used to stabilize such a capacitor power supply.
- the term breakdown diode refers to all diodes which are reverse-biased and are also known as zener diodes or avalanche diodes. For small output powers with an almost constant load, capacitor power supplies are widely used due to their simple and inexpensive design.
- capacitor power supplies have been developed, as described for example in DE 38 01 399 A1, in which the switching process for switching the switching means from a switch position charging the storage capacitor into a switch position interrupting the charging process is provided at a point in time at which the Switching means is only slightly energized. Consequently, no steep switching edges should be generated in this switching process.
- a control device is connected upstream of the switching means, by means of which control device the switching means is brought into its switch position which interrupts the charging process when the voltage on the output side of the charging capacitor is correspondingly low to the cycle of the mains voltage. At such a switching time, the switching means is only slightly energized.
- This capacitor power supply is switched back to the charging mode when the output voltage of the storage capacitor falls below a predetermined target value.
- This switching process depends solely on the state of charge of the storage capacitor and can therefore be carried out at any time with regard to the cycle of the mains voltage. Even if the switch at this point in time can at best only be under a low voltage, the switching means is, however, supplied with a relatively high current, so that generation of current peaks cannot be ruled out. If the current consumer is operated continuously, the required current is continuously drawn from the storage capacitor. Through the control of the switching means described in this document, it is continuously switched back and forth between the two operating positions in accordance with the frequency of the network cycle or the rectified voltage half-waves. Because of the power loss that occurs, in particular when the switching means is switched to the charging mode of the storage capacitor, there is a risk that the electronic components can be heated up to their destruction.
- the invention is therefore based on the object of providing a capacitor power supply unit which is also suitable for continuous operation of the current consumer connected to it.
- Another object of the invention is to provide a corresponding method for operating a capacitor power supply.
- the device-related object is achieved in that the switching time determination element and the state of charge determination element, which represent a logical AND function, interconnected and act on the control input of the switching means, so that both switching operations of the switching means - the switching of the capacitor power supply to the charging mode or the switching thereof Interruption of the charging operation - take place at a point in time at which the voltage applied to the charging capacitor on the output side is less than or equal to the reference voltage.
- the method-related problem is solved according to the invention in that the method for operating a capacitor power supply with a switching means has the following steps, starting from a charging mode for charging a storage capacitor:
- the switching time determination element and the state of charge determination element are electronically connected to one another by a logical AND function and in this way act on the control input of the switching means. A switching process is therefore only triggered if corresponding control signals are present at the control input of the switching means both from the switching time determination element and from the state of charge determination element.
- the charge state determination element can provide two control signals, one of which represents the state of the storage capacitor, in which its output voltage is greater than a predetermined setpoint, reproducing the limit value of the output voltage, and another of which represents the state of the storage capacitor, in which its output voltage is less than or equal to the setpoint. If the first control signal is present, it is not necessary to recharge the storage capacitor.
- the switching time determination element is acted upon by a reference voltage which is very low compared to the mains alternating voltage, advantageously about 0 V or equal to 0 V.
- the control signal of the switching time determination element is provided when the voltage applied to the charging capacitor on the output side is less than or equal to the reference voltage. This ensures that the switching means is only switched when the switching means is de-energized or essentially de-energized.
- the logical AND operation of the two control signals acting on the control input of the switching means causes the switching means not to be switched when the power consumption connected to the capacitor power supply is in continuous operation, but to remain in its open position, which represents the charging operation of the capacitor power supply until the operation of the power consumer has been stopped and the output voltage at the storage capacitor has exceeded the setpoint due to the recharging.
- the capacitor and the network are only exposed to a very low pulse load with regard to the electromagnetic compatibility, which can be far below the prescribed limit value.
- the capacitor power supply according to the invention thus implements a principle of controlled recharging of the storage capacitor using a soft switching process to interrupt and switch on the charging process. Therefore, the capacitor power supply is subject to only insignificant heating even with relatively large loads that fluctuate depending on the operating point.
- Such a capacitor power supply can thus also be used to control a relay, for example, without having to take additional cooling measures.
- a comparator element is expediently provided as the switching time determination element, by means of which the applied voltage is compared with a predetermined reference voltage as a function of the phase of the voltage curve.
- the reference voltage is selected so that it represents a voltage in the region of the zero crossing of the voltage curve present on the output side of the charging capacitor.
- a particularly favorable reference voltage is 0 V, so that actuation of the switching means is only possible when the switching means is de-energized.
- the elements required for the capacitor power supply are electronic circuits or switching elements. If such a capacitor power supply is provided, an electronic semiconductor switch, in particular a thyristor, is advantageously used, at the gate of which the outputs of the switching time determination element and the state of charge determination element are present.
- the control input of the switching means may be preceded by a memory element for storing the control signals generated by the switching time determination element and the charging state determination element.
- a thyristor is exemplary and that other equivalent electronic switching means, such as triacs, can also be used.
- the switching time determination element implemented by a circuit and the state of charge determination element likewise implemented by a circuit are connected in the form of an AND function (a so-called wired AND function).
- the reference voltage can be applied externally to the switching time determining element or - as provided in a preferred exemplary embodiment - by a zener diode assigned to the switching time determining element.
- Fig. 3 a circuit diagram of a capacitor power supply according to the in
- FIG. 1 shows a capacitor power supply 1 in a schematic block diagram.
- the capacitor power supply 1 comprises a charging capacitor 2 which is arranged for charging a storage capacitor 3.
- the capacitance of the storage capacitor 3 is many times greater than the capacitance of the charging capacitor 2.
- the ratio of the two capacitors to one another is coordinated such that the ripple of the output voltage U a of the storage capacitor 3 is limited to the required value specified by the load .
- Two diodes 4, 5 are provided for rectifying the AC voltage U_ applied to the network. Consequently, this rectifier 4, 5 provides voltage half-waves separated in time by one voltage half-wave.
- a switching means 6 is arranged between the charging capacitor 2 and the storage capacitor 3, which is in its position shown in FIG. 1 in the position “0” for charging the storage capacitor 3.
- the switching means 6 has a control input 7 at which the output of a memory element 8 is connected.
- the memory element 8 is acted upon by the control signals of both a switching time determination element 9 and a state of charge determination element 10.
- the switching time determination element 9 is connected on the input side to a charging line 11 connecting the charging capacitor 2 and the storage capacitor 3 via the diode 5 , the tap provided on the charging capacitor side in front of the diode 5 is.
- the input of the state of charge determination element 10 is arranged for tapping the output voltage of the storage capacitor 3.
- the switching time determination element 9 compares the voltage U s present in the charging line 11 with a reference voltage U prot , which is either present at another input of the switching time determination element 9 or is provided electronically. The switching time determination element 9 then generates a control signal which is passed on to the switching means 6 when the voltage U s of the charging line 11 is less than or equal to the reference voltage U prot .
- the reference voltage U prot is 7 V.
- the memory element 8 transmits a control signal to the switching means 6 for switching it from the position "0" to the position "1" when the two AND-linked conditions mentioned are met.
- the switching means 6 switches to the "1" position, as a result of which the charging process of the storage capacitor is interrupted by diverting the current flow to the ground.
- the capacitor power supply 1 switches back to the charging mode recharging the storage capacitor 3 when both the output voltage U a of the storage capacitor 3 drops below the limit value U max and a control signal is provided by the switching time determination element, according to which the output side is connected to the charging capacitor.
- voltage U a is less than or equal to the reference voltage U prot .
- FIG. 3 shows the circuit diagram of the capacitor power supply 1 in one embodiment.
- a thyristor 12 serves as switching means, the gate 13 of which is connected to the outputs of the switching time determination element 9 and of the charge state determination element 10.
- the switching time determination element 9 is implemented by two resistors R1, R2, a diode D2, a Zener diode Z1 and a transistor T1 as an inverter.
- the reference voltage of 7 V is provided by the Zener diode Z1 in the switching point determination element 9 shown.
- the state of charge determination element 10 is implemented by two resistors R3, R4 and a Zener diode Z2.
- the two rectifying diodes are identified by the reference numerals 4 and 5.
- a choke L1 is arranged on the output side of the charging capacitor 2 to limit the current rise in the first switch-on moment of the device and the critical current rise of the thyristor 12 in the stationary case. From the circuit diagram shown in FIG. 3, it can be seen that the switching time determination element 9 and the charge state determination element 10 represent, in terms of circuitry, a UN D link - a so-called wired AND function.
- time is plotted in the direction of the x-axes and voltages or states are plotted on the y-axes.
- the top diagram shows the profile of the voltage U a applied to the storage capacitor 3 on the output side , the profile of the voltage U s applied to the charging capacitor 2 on the output side, the reference voltage U prot and the limit value of the output voltage U max (setpoint) of the storage capacitor 3.
- the time interval in which the condition that the output voltage U a of the storage capacitor 3 is greater than the limit voltage U max can be seen in the diagram below.
- the times in which the further condition is fulfilled that the voltage U s ⁇ U prot applied to the charging capacitor 2 is shown in the third diagram.
- the two diagrams below show the time period in which the switching means is energized and the switch status.
- the voltage diagram U_ on the mains side is shown in the bottom diagram.
- the capacitor power supply 1 is in its charging mode for charging the storage capacitor 3.
- the voltage U a present on the output side at the storage capacitor 3 exceeds the limit value of Output voltage U max , so that one switching condition U a > U max for switching the capacitor power supply 1 or its switching means 6, 12 is fulfilled.
- Switching of the switching means 6, 12 takes place, however, only at a point in time when the further condition U s U U prot is fulfilled. This point in time is identified as t 2 .
- the switching means 6, 12 is closed; the switch state from this point in time in position "1" (see FIG. 2).
- the maximum of the voltage U a or U s corresponds to the maximum in time of the voltage curve U_ applied to the network.
- the voltage U s present on the output side at the charging capacitor 2 drops with the cycle of the mains voltage U_ until this voltage U s falls below the value of the reference voltage U prot at the instant t 2 .
- the voltage U s at time t 3 which represents the negative maximum of the voltage curve U_ in this cycle, exceeds the reference voltage U prot .
- the switching means 6, 12 is energized. It is now not possible to actuate the switching means 6, 12, since the condition U s ⁇ U prot is not fulfilled in this period.
- a capacitor is connected in parallel with the resistor R2. This causes a time delay of the time t 2 shown in FIG. 4, so that a switching operation is only possible when U s is less than U prot .
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9810539-6A BR9810539A (pt) | 1997-12-06 | 1998-11-10 | Unidade de suprimento de capacitor e processo para movimentar uma unidade de suprimento de capacitor |
US09/530,633 US6366058B1 (en) | 1997-12-06 | 1998-11-10 | Capacitor power supply unit |
AU18716/99A AU1871699A (en) | 1997-12-06 | 1998-11-10 | Capacitor supply unit |
JP52976999A JP2002509690A (ja) | 1997-12-06 | 1998-11-10 | コンデンサ電源ユニット |
EP98963437A EP1036432A1 (de) | 1997-12-06 | 1998-11-10 | Kondensatornetzteil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19754239.5 | 1997-12-06 | ||
DE19754239A DE19754239A1 (de) | 1997-12-06 | 1997-12-06 | Kondensatornetzteil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999030408A1 true WO1999030408A1 (de) | 1999-06-17 |
Family
ID=7851012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/007183 WO1999030408A1 (de) | 1997-12-06 | 1998-11-10 | Kondensatornetzteil |
Country Status (7)
Country | Link |
---|---|
US (1) | US6366058B1 (de) |
EP (1) | EP1036432A1 (de) |
JP (1) | JP2002509690A (de) |
AU (1) | AU1871699A (de) |
BR (1) | BR9810539A (de) |
DE (1) | DE19754239A1 (de) |
WO (1) | WO1999030408A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10002650A1 (de) * | 2000-01-21 | 2001-08-09 | Niels Dernedde | Schaltungsanordnung zur Reduktion der Wirkleistung in einer stabilisierten Gleichspannungsversorgung mittels eines Vorschaltkondensators |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0109955D0 (en) * | 2001-04-23 | 2001-06-13 | Nicotech Ltd | Inverter circuits |
US7112897B2 (en) * | 2002-12-06 | 2006-09-26 | Northrop Grumman Corporation | Capacitor and switch components cooperation to maintain input voltage to target circuit at or above cut-off voltage until power circuit is able to maintain the input voltage |
DE10336287B4 (de) * | 2003-08-07 | 2005-12-22 | Siemens Ag | Netzfilter- und Stromversorgungseinrichtung |
EP2068433A1 (de) | 2007-11-27 | 2009-06-10 | Koninklijke Philips Electronics N.V. | Kondensatornetzteil und damit ausgestattetes elektronisches Gerät |
DE102009033385B4 (de) * | 2009-07-16 | 2018-09-20 | Diehl Ako Stiftung & Co. Kg | Netzteil-Schaltungsanordnung und Verfahren zum Betreiben einer Netzteil-Schaltungsanordnung |
US9136777B2 (en) | 2010-02-18 | 2015-09-15 | Koninklijke Philips N.V. | Capacitively coupled power supply system |
DE102011119259A1 (de) | 2011-11-24 | 2013-05-29 | Bombardier Transportation Gmbh | Verdopplergleichrichter für mehrphasiges kontaktloses Energieübertragungssystem |
TW201328152A (zh) * | 2011-12-28 | 2013-07-01 | Ushijima Masakazu | 輔助電源產生電路 |
FR2991834B1 (fr) * | 2012-06-08 | 2017-04-07 | Alexandre Crisnaire | Dispositif d'alimentation d'un appareil electrique |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801399A1 (de) * | 1988-01-20 | 1989-08-03 | Weiss Alfons Awe Gmbh Co Kg | Netzteil zur erzeugung einer geregelten gleichspannung |
EP0650250A1 (de) * | 1993-10-22 | 1995-04-26 | STMicroelectronics S.r.l. | Gleichstromwandler im diskontinuierlichem Betrieb arbeitend |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4346431A (en) * | 1981-01-12 | 1982-08-24 | General Electric Company | Field controlled thyristor switching power supply |
DE3501519A1 (de) * | 1985-01-18 | 1986-08-28 | BIOTEC Biotechnische-Apparatebau-Gesellschaft mbH, 4040 Neuss | Elektronische einrichtung zur reduktion der verlustleistung bei der erzeugung einer stabilisierten gleichspannung oder eines stabilisierten gleichstromes aus einer wechselspannungsquelle |
DE3534042A1 (de) * | 1985-09-24 | 1987-03-26 | Siemens Ag | Schaltung zum betrieb eines relais |
KR930001548A (ko) * | 1991-06-13 | 1993-01-16 | 강진구 | 돌입 전류방지 장치를 갖춘 커패시터 입력형 정류 평활기 |
US5745352A (en) * | 1994-10-27 | 1998-04-28 | Sgs-Thomson Microelectronics S.R.L. | DC-to-DC converter functioning in a pulse-skipping mode with low power consumption and PWM inhibit |
JPH1042553A (ja) * | 1996-07-25 | 1998-02-13 | Rohm Co Ltd | 電源装置 |
US5923154A (en) * | 1997-04-28 | 1999-07-13 | Delco Electronics Corp. | Voltage boost circuit |
-
1997
- 1997-12-06 DE DE19754239A patent/DE19754239A1/de not_active Withdrawn
-
1998
- 1998-11-10 WO PCT/EP1998/007183 patent/WO1999030408A1/de not_active Application Discontinuation
- 1998-11-10 US US09/530,633 patent/US6366058B1/en not_active Expired - Fee Related
- 1998-11-10 BR BR9810539-6A patent/BR9810539A/pt not_active Application Discontinuation
- 1998-11-10 EP EP98963437A patent/EP1036432A1/de not_active Withdrawn
- 1998-11-10 AU AU18716/99A patent/AU1871699A/en not_active Abandoned
- 1998-11-10 JP JP52976999A patent/JP2002509690A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801399A1 (de) * | 1988-01-20 | 1989-08-03 | Weiss Alfons Awe Gmbh Co Kg | Netzteil zur erzeugung einer geregelten gleichspannung |
EP0650250A1 (de) * | 1993-10-22 | 1995-04-26 | STMicroelectronics S.r.l. | Gleichstromwandler im diskontinuierlichem Betrieb arbeitend |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10002650A1 (de) * | 2000-01-21 | 2001-08-09 | Niels Dernedde | Schaltungsanordnung zur Reduktion der Wirkleistung in einer stabilisierten Gleichspannungsversorgung mittels eines Vorschaltkondensators |
DE10002650C2 (de) * | 2000-01-21 | 2003-04-10 | Niels Dernedde | Schaltungsanordnung zur Reduktion der Wirkleistung in einer stabilisierten Gleichspannungsversorgung mittels eines Vorschaltkondensators |
Also Published As
Publication number | Publication date |
---|---|
US6366058B1 (en) | 2002-04-02 |
DE19754239A1 (de) | 1999-06-10 |
AU1871699A (en) | 1999-06-28 |
EP1036432A1 (de) | 2000-09-20 |
JP2002509690A (ja) | 2002-03-26 |
BR9810539A (pt) | 2000-09-05 |
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