EP2104978A2 - Transformer circuit for the frequency conversion of electric performance variables, method for actuating a transformer circuit and power generator - Google Patents
Transformer circuit for the frequency conversion of electric performance variables, method for actuating a transformer circuit and power generatorInfo
- Publication number
- EP2104978A2 EP2104978A2 EP07856819A EP07856819A EP2104978A2 EP 2104978 A2 EP2104978 A2 EP 2104978A2 EP 07856819 A EP07856819 A EP 07856819A EP 07856819 A EP07856819 A EP 07856819A EP 2104978 A2 EP2104978 A2 EP 2104978A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- voltage
- generator
- output
- switches
- 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- Withdrawn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
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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Definitions
- Converter circuit for the exchange of electrical power quantities.
- the present invention relates to an electrical converter circuit for the exchange of electric power quantities, in particular for use in an electric power generator, with a rectification circuit which is connectable to the electrical output of an electric generator, a DC link, which is the input side connected to the rectification circuit and the output with an inverter circuit for generating an alternating voltage is connected, wherein the intermediate circuit comprises a series circuit of two switches and a series circuit of two capacitors, wherein the series circuits are connected to each other via catcher diodes, wherein the switches and the capacitors are connected together in a first center tap, and with a control device for independently controlling the switches and controlling the inverter circuit. Furthermore, the present invention relates to a method for driving such a converter circuit and a power generator with a drive motor, for example in the form of an internal combustion engine, with an electric generator and an electrical converter circuit of the type mentioned.
- a part of the input rectifier circuit of the electrical converter circuit is known from document WO 02/09267.
- the power generators typically have a drive motor such as an internal combustion engine (gasoline or diesel) and an electric generator connected thereto.
- a drive motor such as an internal combustion engine (gasoline or diesel) and an electric generator connected thereto.
- VSCF inverter power generators
- the inverter power generators have the advantage that the provision of almost any output voltages and frequencies and network forms can be realized.
- An inverter power generator is known from the document EP 1 187 305 A2.
- the converter circuit has a semi-controlled six-pulse bridge circuit with which a constant DC output voltage can be generated. This intermediate circuit voltage can be converted into an alternating variable via a downstream full bridge and smoothed by means of an output filter (LC filter).
- LC filter output filter
- an inverter power generator is known from document WO 06/035612 A, in which an AC voltage supplied by the generator is first rectified and then boosted via a step-up converter in order to generate a constant DC link voltage.
- a full bridge is used to generate an alternating size. Further switches connected in parallel serve to create a resilient center point. By means of the outputs of the full bridge, two output voltages can be provided against the loadable center point (which is also supported by a coil), which output voltages can be tapped either alone or in total from one load.
- WO 02/09267 A1 a method for constant current generation by means of a rotational energy source (internal combustion engine), a generator and a control circuit is known.
- the generator is designed for constant current generation.
- the control circuit has an intermediate circuit, which is connected on the input side with an unregulated rectification circuit and the output side is connected to a Abtaktan eleven.
- the intermediate circuit has a series connection of two switches and a series connection of two capacitors, wherein the series circuits are connected to one another via catcher diodes.
- the switches and the capacitors are connected together in a first center tap.
- the switches can be controlled and closed separately, so that independent of one another adjustable voltages between the first center tap to the respective parallel terminals can be constructed in a wide range.
- both capacitors are charged when the two switches are open.
- the switches can be designed as IGBTs. If only one switch is open, the diagonally opposite capacitor is charged. Thus, with low generator terminal voltage caused by low generator speeds, "pumping" across the capacitors can result in a desired final voltage.
- the inverter circuit has at least one connected to the DC link half-bridge circuit with a second center tap, wherein the AC voltage generated by the inverter circuit derived from the potential at the first and at the second center tap is.
- a loadable center in the form of the first center tap is provided by the connection of the intermediate circuit and inverter circuit, which is higher loadable than in conventional half-bridge circuits.
- the low-frequency load current is passed through the generator, only high-frequency load current components are passed through the capacitors.
- the loadable center tap makes it possible, in particular, to connect several half-bridges in parallel and connect them, for. B. operate in parallel mode. Since the low-frequency load currents are in turn passed through the generator, the capacitors used must only carry the high-frequency load current component, i. even with parallel operation, the capacitors do not have to be dimensioned larger.
- the first center tap is not to be supported via a throttle, as is required in the converter circuit of WO 2006/035612 A.
- the two switches of the intermediate circuit enable an active balancing of the voltages applied across the capacitors, as is also disclosed in document WO 02/09267.
- a half-bridge circuit is provided in place of the full bridge usually connected to the intermediate circuit in order to provide an alternating voltage between a second center tap of this half-bridge circuit and the first center tap.
- the rectification circuit is an unregulated, ie, unpulsed, rectification circuit, and the generator is preferably already structurally designed to supply as constant a current as possible at the output of the downstream, unpulsed rectification circuit.
- a power generator equipped with the electric converter circuit can be, in particular, a mobile power generator, in particular in the form of a power generator that can be worn by a person.
- the converter circuit can also be used for other power generators, in particular for semi-mobile power generators for professional use.
- the above object is achieved by a method for driving a converter circuit according to the invention, wherein the control device opens the two switches in a load operation both when the voltages across the capacitors are already in a desired voltage range by direct supply from a converter driving the converter circuit.
- the inverter circuit has at least two half-bridge circuits and provides a corresponding number of alternating voltages at its output. This makes it possible in a comparatively simple manner, as in the aforementioned WO 06/035612 A, to provide a plurality of AC voltages, which may be combined with each other.
- control device is designed to control the half-bridge circuits either in the same or in phase, so that the AC voltages provided are in-phase or out of phase with one another.
- in-phase or phase-shifted AC voltages can be made depending on the application.
- the inverter circuit has exactly two half-bridge circuits and provides two alternating voltages at its output which, depending on the control of the half-bridge circuits, are equal or inverse phase.
- the inverter circuit has three half-bridge circuits and provides at its output three alternating voltages, which are three-phase in phase opposition to one another.
- the universal character of the converter circuit according to the invention can be used advantageously.
- different sockets for example, for use in the US or the application in Europe
- a suitable coding of the respective socket information for the control device This makes it possible to operate the control device so that it provides suitable AC voltages for the respective application or the respective field of application.
- sockets can carry codes that are queried by the controller, or can also actively "report” their state to the controller.
- control device closes a switch if the voltage applied across the capacitor parallel thereto exceeds a maximum value.
- either a single switch or both switches are closed, which may result in the generator being shorted. It is understood that this mode is usually applied only relatively short, for example, in a sudden load shedding, which can lead to an increase in the capacitor voltages. This preferred mode is also referred to as "backward control mode”. It should also be understood that the generator generally has to be short-circuit proof.
- the control means alternately opens and closes the two switches to increase the voltage across the capacitors, when the speed of a generator driving the converter circuit is less than a predetermined speed.
- This mode in which the capacitors are charged crosswise, is preferably used in a partial load range.
- the predetermined speed is a value in the range of 1/2 to 4/5 of the rated speed of the generator (and thus the drive motor).
- the output AC voltage can be kept relatively high, wherein the drive motor can run at a significantly reduced speed (to save energy in part-load or idle mode).
- the preferred mode is also referred to as "Voltage Doubler Mode".
- the switches only have to be operated at relatively low frequencies, so that the switches can each be formed inexpensively.
- control device clocks both switches for a short time at high frequency, thereby increasing the voltage applied across the capacitor series circuit voltage.
- the two switches must be designed for a relatively high-frequency clocking (for example in the range of 4-10 kHz).
- the output voltage of the generator can be increased by taking advantage of the leakage inductance of the generator.
- This operating mode is particularly suitable if the combination of motor and generator has a large mass moment of inertia. In this operating mode comparatively high electronic disturbances (EMC) are generated, so that this mode is preferably implemented in applications with loads> 10 kVA.
- EMC electronic disturbances
- This mode of operation is also referred to as "boost mode".
- a balancing of the voltages applied across the capacitors can optionally take place, if they do not have the same absolute value. This could be caused, for example, by an unbalanced load at the output.
- the symmetrization can take place in these operating modes.
- Fig. 1 is a schematic block diagram of a power generator according to the invention
- Fig. 2 is a more detailed circuit diagram of the power generator of Fig. 1, the inverter circuit having two half-bridge circuits; 3 shows a detailed view of a further embodiment of a power generator according to the invention, wherein the inverter circuit has a single half-bridge circuit;
- FIG. 4 shows a detailed view of a further embodiment of a power generator according to the invention, wherein the inverter circuit has three half-bridge circuits;
- FIG. 5 shows in schematic form a possible coding of sockets of a power generator according to the invention
- FIG. 6 is a circuit diagram of a portion of the inverter circuit of FIG. 2 with an OVC half bridge connected thereto for reducing voltages;
- FIG. 7 shows a circuit diagram of the power generator according to the invention in the "free-running mode"
- FIG. 8 shows circuit diagrams of the power generator according to the invention in the "voltage doubler mode"
- FIG. 9 shows a circuit diagram of the power generator according to the invention in the "backward-control mode"
- FIG. 11 in schematic form four modes of the invention
- a first embodiment of a power generator according to the invention (gene set) is generally designated 10.
- the power generator 10 may in particular be a portable power generator, wherein the components described below are defined in a common housing or on a common frame, which is not shown in more detail in the figures.
- the power generator 10 has a drive motor 12 in the form of an internal combustion engine (diesel or gasoline) and an electric generator 14.
- the electric generator 14 is equipped with a permanent magnetic excitation, as indicated schematically by the magnet shown.
- the electric generator 14 provides (for example, at respective stator windings) a three-phase AC voltage 16, which is supplied to the converter circuit according to the invention, which is generally designated 20 in FIG.
- the converter circuit 20 provides at its output an output voltage 22 or a plurality of output voltages, which will be explained below.
- the converter circuit 20 has a rectification / power control arrangement 24 which, as will be explained below, includes an unregulated rectification circuit 3 and intermediate circuit 4.
- the output of the rectification / power control arrangement 24 is connected to an inverter arrangement 26.
- the output of the inverter assembly 26 is connected via unspecified smoothing members (LC members) with a load 28, which is thereby supplied with the output voltage (s) 22.
- the converter circuit 20 further includes a controller generally indicated at 30.
- the control device 30 includes a control device 32 for the Rectifier / power controller assembly 24 and controller 34 for inverter assembly 26.
- the controller 32 measures the current at the parallel terminals at the output of the rectification / power control assembly 24 and also measures the voltages between the parallel terminals and a center conductor, not further specified.
- the control device 32 activates two switches of the rectification / power control arrangement 24 via a driver.
- the controller 32 receives the rotational frequency of the generator 14 or a signal from which the rotational frequency can be determined - for example, one or more pulses per revolution - and is also designed to control the drive motor 12, for example via the throttle position.
- the control device 34 for the inverter assembly 26 receives the same measurement signals from the output of the rectification / power control assembly 24 and further receives corresponding electrical measurement signals from the output side of the inverter assembly 26.
- the inverter assembly 26 as will be explained below, two half-bridges are provided each have two switches. The switches are controlled by the control device 34 via a corresponding driver.
- the controller 34 further receives a reference voltage U * re f.
- FIG. 2 shows the power generator 10 shown in FIG. 1 in the form of a rectifier circuit diagram.
- the individual sections of the power generator are numbered 1 to 6, wherein the section 1 corresponds to the drive motor 12, wherein the section 2 corresponds to the generator 14, wherein the section 3 corresponds to the rectification circuit, the section 4 corresponds to the intermediate circuit, wherein the section. 5 corresponds to the inverter assembly 26 and wherein the portion 6 of the load assembly 28 corresponds.
- the rectification circuit 3 is formed as an unregulated rectification circuit with a total of six diodes 3-1, 3-2, ... 3-6.
- an intermediate circuit voltage U ⁇ At the output of the rectification circuit is an intermediate circuit voltage U ⁇ .
- the intermediate circuit voltage UZK is applied between a first intermediate circuit conductor 40 and a second intermediate circuit conductor 42.
- the intermediate circuit 4 has a series connection of two switches 4-1, 4-4, which are controlled by means of the control device 32.
- the switches 4-1, 4-4 can be controlled independently of one another by the control device 32.
- the intermediate circuit 4 also has a series connection of two capacitors 4-5, 4-2.
- the two series circuits are connected to each other via catcher diodes 4-6, 4-3.
- the series connection of the two switches 4-1, 4-4 is directly connected to the first and the second intermediate circuit conductor 40, 42.
- the series connection of the two capacitors 4-5, 4-2 is connected to a first inverter conductor 46 and a second inverter conductor 48, respectively.
- the two switches and the two capacitors are connected together in a first center tap 44.
- About the one capacitor 4-5 is a voltage U «on.
- Above the other capacitor 4-2 is a corresponding capacitor voltage U 4- Z.
- an inverter section 5a is connected, which has a first half-bridge of two switches 5a-l, 5a-2 and a second, parallel thereto half-bridge of two switches 5a-6, 5a-7.
- the first half-bridge is generally designated 49A in FIG. 2, the second half-bridge 49B.
- the switches 5a-l, etc. are controlled by the control device 34.
- the switches of the intermediate circuit 4 or of the inverter section 5a shown in FIG. 2 can each be designed as IGBTs or as other semiconductor switches.
- a diode provided in each case above the switch can be provided as required or else possibly omitted.
- a center tap 5OA is provided between the two switches 5a-1, 5a-2 of the first half-bridge 49A.
- another center tap 5OB is provided between the two switches 5a-6, 5a-7 of the second half-bridge 49B.
- the center tap 50A is connected to a first output terminal 60 (A) through a first output conductor 52 and a first LC filter (composed of a coil 15a-3 and a capacitor 15a-4).
- a first output voltage UAN is applied between the first output terminal 60 and the center conductor N connected to the center tap 44.
- the further center tap 50B is connected to a second output terminal 62 (B) via a second output conductor 54 and a second LC filter 56B. Between the center conductor N and the second output terminal 62 is applied to a second output voltage UNB.
- the voltages UAN, UN B are respectively applied across the capacitors 5a-4 and 5a-9 of the LC filters 56A and 56B.
- the load 28 can now be connected either to one of the two voltages U A N, UN B or to the two terminals A, B, so that the total voltage from these two voltages is applied to the load.
- Other load combinations are conceivable, as will be explained below.
- Fig. 3 shows another embodiment of a power generator 10 '.
- the power generator 10 ' generally corresponds in terms of design and operation to the power generator 10 of FIGS. 1 and 2. Only differences will be explained below.
- the inverter section 5b has only a single half-bridge 49 'which includes two switches 5b-1, 5b-2. Between these two switches 5b-l, 5b-2, a single center tap 50 'is provided.
- single-phase sinusoidal output voltages UAN can be generated whose maximum voltage amplitude depends on the voltage across the capacitors 4-5, 4-2.
- FIG. 4 A further alternative embodiment of a power generator 10 "is shown in Figure 4.
- the power generator 10 generally corresponds in terms of design and operation to the power generator 10 of Figures 1 and 2. Only differences will be explained below.
- the inverter section 5c of the power generator 10 has three half-bridge circuits 49A", 49B “, 49C” with respective center taps 50A “, 50B” and 50C ", respectively.
- the loadable neutral conductor N which is connected to the first center tap 44, forms a true four-conductor system.
- the current generators 10, 10 ', 10 "in FIGS. 1 to 4 are each based on the same basic structure and, despite different applications, can be operated with the same drive motor 12, the same generator 14 and the same rectification / power control arrangement 24.
- the intermediate circuit 24 or 4 must be operated in the free-running mode, the voltage-doubler mode, the backward-control mode, etc. For applications with larger loads, this may also be the case intended to set up the "boost mode".
- Fig. 5 the coding of different sockets 36 is shown in a schematic form, which can be connected interchangeably at the output of the inverter assembly 26 of FIGS. 1 and 2.
- the coding can be done, for example, with 2 bits, resulting in four different combinations.
- a voltage V of 230 volts and with a frequency f of 50 Hertz is provided, which is shown in Fig. 5 as a "series mode.”
- a similar voltage, which can also be set up in “series mode”, can also be provided with 60 Hertz (Encoding Y).
- the socket with the coding Z, whereby, for example, a "parallel mode" can be set up, in which a load of 115 Volt and usually 60 hertz between the interconnected terminal contacts A, B and the center conductor N is connected.
- FIG. 5 Another connection option is shown in Fig. 5 on the right side ("series mode with loaded center-tap"), wherein over the terminals A, B, a voltage of 240 volts is applied and in this case a load can be applied, as well as loads between the terminals A, B and the neutral conductor N (each with 115 volts).
- Fig. 6 illustrates the inverter 26 of Fig. 2, wherein parallel to the two half-bridges 49A, 49B, a further half-bridge 70 is connected to control overvoltages.
- a center tap of the Over Voltage Circuit (OVC) half bridge 70 has a center tap connected to ground via a chopper resistor 72.
- OVC Over Voltage Circuit
- the two switches of the OVC half-bridge 70 are normally open, so that the inverter 26 of FIG. 6 has the same function as the inverter of FIG. 2 described above.
- the OVC half-bridge can avoid overvoltages that can occur when energy is fed back into the DC link 4 (eg when braking a connected load).
- Such a voltage increase can not be reduced by the switches 4-1, 4-4 of the intermediate circuit due to the catcher diodes 4-6, 4-3.
- a voltage increase can be avoided or reduced by converting the energy fed back into heat by means of the chopper resistor 72. This can generally be done for the total voltage, but is preferably done by means of the half-bridge 70, such that the voltage reduction for each capacitor 4-5, 4-2 can be done separately.
- the OVC half-bridge is an optional feature of the present invention, but is relatively inexpensive to implement, since a three-phase module is preferably used for the inverter. Furthermore, preferably only two of the half-bridges (namely, the half-bridges 49A, 49B) are used for the modulation of the output voltage
- FIG. 7 shows first the generator 2 and the rectifier 3 in the form of an equivalent circuit diagram. It can be seen that both switches 4-1, 4-4 are open in the "free running mode", so that the corresponding current 78f flows completely across the catcher diodes 4-6, 4-3 and the capacitors 4-5, 4-2 Consequently, a corresponding voltage 8Of, which is equal to the rectified voltage UR *, drops across the capacitors.
- FIG. 10 shows two alternative possibilities for setting up the so-called "boost mode”.
- a corresponding output voltage can also be achieved if the two switches 4-1, 4-4 are each driven alternately with the higher clock frequency.
- FIG. 11 shows in diagram 90 possible operating modes of the current generators of FIGS. 1 to 4.
- Normal mode is "Free-Running Mode.” This mode is the mode set up for higher rated voltages when the load is connected, ie, in the nominal voltage range between Voltage Doubler OFF and Backward Control OFF voltages Transition to the partial load range, then, when the voltage drops to "Voltage Doubler ON", this mode is turned on. The Voltage Doubler mode remains switched on until the Voltage Doubler OFF voltage is reached, which defines the lower limit of the nominal voltage range. Due to the thus set hysteresis for Ein standing. Switching off the operating mode “Voltage-Doubler-Mode” ensures that there is no unnecessary switching back and forth between the operating modes. In the same way, the "Backward-Control” mode is activated when the voltage "Backward-Control-ON" is reached. This is well above the upper limit of the rated voltage range, so that here too hysteresis is set up to avoid unnecessary switching back and forth between the modes.
- Fig. 11 Further shown in Fig. 11 is the application of the OVC mode, which is used when relatively high voltages (overvoltages) occur which are caused, for example, by a load side power supply.
- the free-running mode is set outside the nominal voltage range between backward-control-off and voltage-doubler-off by default (ie, the two switches 4-1 and 4-4 are open, if provided) due to the DC link voltage does not result in switching on one of the other modes). Therefore, the free-running mode is shown hatched in the voltage range outside the rated voltage range.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610062406 DE102006062406A1 (en) | 2006-12-21 | 2006-12-21 | Converter circuit for the exchange of electrical power quantities, method for driving a converter circuit and power generator |
PCT/EP2007/011087 WO2008077525A2 (en) | 2006-12-21 | 2007-12-18 | Transformer circuit for the frequency conversion of electric performance variables, method for actuating a transformer circuit and power generator |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2104978A2 true EP2104978A2 (en) | 2009-09-30 |
Family
ID=39431878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07856819A Withdrawn EP2104978A2 (en) | 2006-12-21 | 2007-12-18 | Transformer circuit for the frequency conversion of electric performance variables, method for actuating a transformer circuit and power generator |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2104978A2 (en) |
DE (1) | DE102006062406A1 (en) |
WO (1) | WO2008077525A2 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3439894A1 (en) * | 1984-10-31 | 1986-04-30 | Siemens AG, 1000 Berlin und 8000 München | Interference-suppressed arrangement comprising a converter circuit and a machine |
DE3540830A1 (en) * | 1984-11-16 | 1986-05-22 | Joh. Vaillant Gmbh U. Co, 5630 Remscheid | Method for the step-by-step adjustment of an electrical power present at a resistor connected to voltage via a switch, and circuit arrangement for carrying out the method |
US5424936A (en) * | 1994-01-12 | 1995-06-13 | Deltec Corporation | Boost-input backed-up uninterrupted power supply |
US5570002A (en) * | 1994-02-18 | 1996-10-29 | Ergo Mechanical Systems, Incorporated | Universal power-supply connection system for multiple electronic devices |
JPH09140157A (en) * | 1995-11-10 | 1997-05-27 | Sanyo Electric Co Ltd | Inverter device using solar battery |
DE19802711C2 (en) * | 1998-01-24 | 2003-06-05 | Wap Reinigungssysteme | Power reduction of a double turbine in vacuum cleaners |
US6404655B1 (en) * | 1999-12-07 | 2002-06-11 | Semikron, Inc. | Transformerless 3 phase power inverter |
DE10036419A1 (en) * | 2000-07-26 | 2002-03-14 | Generator Technik Schwaebisch | Process for generating constant current and device for carrying it out |
US20020024828A1 (en) * | 2000-08-31 | 2002-02-28 | Hidetake Hayashi | Inverter suitable for use with portable AC power supply unit |
DE10143279B4 (en) * | 2001-09-04 | 2009-05-28 | Semikron Elektronik Gmbh & Co. Kg | frequency converter |
DE10156694B4 (en) * | 2001-11-17 | 2005-10-13 | Semikron Elektronik Gmbh & Co. Kg | circuitry |
DE10310577A1 (en) * | 2003-03-11 | 2004-09-30 | Siemens Ag | Zero phase sequence voltage filter for inverter with self commutating power supply rectifier and DC link circuit has path provided for zero phase sequence voltages between link circuit output and rectifier low pass input filter |
JP2006101668A (en) * | 2004-09-30 | 2006-04-13 | Honda Motor Co Ltd | Power supply |
-
2006
- 2006-12-21 DE DE200610062406 patent/DE102006062406A1/en not_active Withdrawn
-
2007
- 2007-12-18 WO PCT/EP2007/011087 patent/WO2008077525A2/en active Application Filing
- 2007-12-18 EP EP07856819A patent/EP2104978A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
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See references of WO2008077525A3 * |
Also Published As
Publication number | Publication date |
---|---|
DE102006062406A1 (en) | 2008-06-26 |
WO2008077525A2 (en) | 2008-07-03 |
WO2008077525A3 (en) | 2008-09-12 |
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