US2758219A - Single-control variable phase-shift network - Google Patents
Single-control variable phase-shift network Download PDFInfo
- Publication number
- US2758219A US2758219A US511138A US51113855A US2758219A US 2758219 A US2758219 A US 2758219A US 511138 A US511138 A US 511138A US 51113855 A US51113855 A US 51113855A US 2758219 A US2758219 A US 2758219A
- Authority
- US
- United States
- Prior art keywords
- phase
- output terminals
- pair
- terminals
- windings
- 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 - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/18—Networks for phase shifting
- H03H7/21—Networks for phase shifting providing two or more phase shifted output signals, e.g. n-phase output
Definitions
- the invention relates in general to electrical control systems and more particularly to a single-control, variable, phase-shift network.
- phase-shifting systems have required a large number of component parts and have had limited phase-shift range, and While such prior systems were satisfactory in some situations, they proved to be unsuitable for use in certain situation where a very wide phase-shift range was necessary.
- the present invention provides an extremely simple and rapidly adjustable phase-shifting system.
- the invention comprises a potentiometer resistor control element connected with artransformer'to provide a system whereby two output signals are produced from a single input source which are out of phase with each other by some desired degree by selectively adjusting the potentiometer.
- an object of the invention is the provision of a single-control, variable, phase-shift network continuously variable over a very wide range.
- Another object is to provide a method of producing two signals from a single source which are set out of phase by some desired degree.
- a further object is to provide a voltage phase-shift network using only two components.
- a still further object is to provide a phase-shift network having a simple electrical circuit and having no movable parts other than a phase shift-adjustment knob.
- Fig. 1 is a schematic illustration of the single control variable phase-shift network having an input and two outputs.
- Figs. 2, 3 and 4 illustrate curves showing the difierence in phase between the signals across the output terminals of the phase-shift network for various control settings.
- the network shown in Fig. 1 comprises a transformer T, having a primary and a secondary winding.
- the primary winding has terminals 6 and 8; the secondary winding has terminals 10 and 12.
- Each winding of the transformer has the same number of turns, and the windings are center tapped at 7 and 11.
- Terminals 6 and 10 at the lower ends of the transformer windings are connected together and to terminal 2 of a pair of input terminals 2 and 4.
- the center tap terminals 7 and 11 of the transformer windings are connected together by a control element, for instance, a potentiometer resistor, R1 which has a contact arm 5.
- the phase-shift network has two sets of output terminals; output terminals 8 and 9, and output terminals 12 and 13.
- the contact arm 5 of the control element R1 and terminals 9 and 13 of the two Patented Aug. 7, 1956 sets of output terminals are all electrically connected to terminal 4 of the input terminals.
- phase-shift network The general operation of the phase-shift network is as follows: A sine wave signal is introduced across input terminals 2 and 4 allowingcurrent/voltage to 'flow into both halves of the transformer T1. At that point, the signals on both'windings are at the same phase angle; that is to say, at-the' start of the windings the signalson the windings are in phase with each other, while at the ends of the windings the signals are 180 degrees out of phase with each other.
- each winding has a center tap which is 'brought out and connected together by-potentiometer resistor R1 having a contact arm 5, which is electrically connected to output terminals 9 and 13 and to input terminal 2. When contact arm 5 is set at center tap the output signals should be approximately degrees out of phase with each other.
- Fig. 3 represents the signals across the output terminals when the potentiometer contact arm is moved to the left; sine wave A will then lead sine wave B by some amount depending on the setting of control arm 5.
- Fig. 4 represents the signals across the output terminals when the potentiometer is moved to the right; sine wave A will then lag sine wave B by an amount depending upon the setting of control arm 5.
- a single-control variable phase-shift network comprising a transformer having primary and secondary windings, said windings having an equal number of turns and being center tapped, a pair of input terminals, two pairs of output terminals, one end of said primary winding and one end of said secondary winding being connected to one of said input terminals, the other end of said primary winding being connected to one terminal of one pair of said output terminals, the other end of said secondary winding being connected to one terminal of the other pair of said output terminals, a potentiometer connected between the center taps of said primary and secondary windings, the contact arm of said potentiometer and the other terminal of each pair of said output terminals being connected to the other of said input terminals, whereby the phase difference between the voltage appearing across one pair of said output terminals and across the other pair of said output terminals may be varied by the movement of said contact arm of said potentiometer.
- a voltage phase-shift system comprising a transformer having primary and secondary windings, said windings having an equal number of turns and being center tapped, a pair of input terminals, a first and second pair of output terminals, one end of said primary winding and one end of said secondary winding being connected to one of said input terminals, the other end of said primary winding being connected to one terminal of said first pair of output terminals, the other end of said secondary wind.- ing being connected to one terminal of said second pair of output terminals, a potentiometer connected across the center taps of said primary and secondary windings, the movable contact arm of said potentiometer and the other terminal or" said first and second pairs of output terminals being connected to the other of said input terminals, whereby the phase diiference between the voltage appearing across said first pair of output terminals and the voltage across said second pair of output terminals may be varied by the movement of said contact arm of said potentiometer.
- phase-shift system as in claim 2 wherein the phase diiference may be continuously variable from 20 degrees to 355 degrees.
- a variable phase-shift network comprising a transformer having primary and secondary windings, said windings each having the same number of turns and being center tapped, a pair of input terminals, a first pair of output terminals and a second pair of output terminals, the lower end of said primary winding and the lower end of said secondary winding being connected together and to one of said input terminals, the other end of said primary winding being connected to one terminal of said first pair of output terminals, the other end of said secondary winding being connected to one terminal of said second pair of output terminals, a control means connected between the center taps of said primary and said secondary windings, a movable contact means on said control means, said movable contact means and the other terminals of said first and second pairs of output terminals being connected to the other of said input terminals, whereby the phase difference between the signal appearing between said first pair of output terminals and the signal appearing between said second pair of output terminals may be varied by the movement of said contact means of said control means.
- control means is a potentiometer resistor having a movable contact arm.
- phase-shift system as in claim 5 wherein the phase difierence may be varied by said control means from 20 degrees to 355 degrees.
- a voltage phase-shift system comprising a l to 1 ratio transformer having its primary and secondary windings center tapped, a pair of input terminals and two pairs of output terminals, the lower ends of said primary and said secondary windings being connected to one of said pair of input terminals, the other ends of said windings each being connected to one terminal of a pair of said output terminals, a control element connected between the center taps of said windings, a movable contact arm on said control element, said contact arm and the other terminal of each pair of said output terminals being connected to the other of said input terminals, whereby the difierence in phase between the signals across the output terminals may be varied by moving said contact arm.
Description
1956 F. N MILLER SINGLE-CONTROL VARIABLE PHASE-SHIFT NETWORK Filed May 25, 1955 OUTPUT B OUTPUT A INPUT MILLER m ATTORNEYS INVENTOR. N.
FRANK United States Patent SINGLE-CONTROL VARIABLE PHASE-SHIFT NETWORK 8 Claims.
The invention described herein may be manufactured and used by or for the Government of the United'States of America for governmental purposes without the payment of any royalties thereon or therefor.
The invention relates in general to electrical control systems and more particularly to a single-control, variable, phase-shift network. Heretofore, phase-shifting systems have required a large number of component parts and have had limited phase-shift range, and While such prior systems were satisfactory in some situations, they proved to be unsuitable for use in certain situation where a very wide phase-shift range was necessary.
The present invention provides an extremely simple and rapidly adjustable phase-shifting system. In substance, the invention comprises a potentiometer resistor control element connected with artransformer'to provide a system whereby two output signals are produced from a single input source which are out of phase with each other by some desired degree by selectively adjusting the potentiometer.
In accordance with the foregoing, an object of the invention is the provision of a single-control, variable, phase-shift network continuously variable over a very wide range.
Another object is to provide a method of producing two signals from a single source which are set out of phase by some desired degree.
A further object is to provide a voltage phase-shift network using only two components.
A still further object is to provide a phase-shift network having a simple electrical circuit and having no movable parts other than a phase shift-adjustment knob.
Other objects and many of the attendant advantages of this invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing(s) wherein:
Fig. 1 is a schematic illustration of the single control variable phase-shift network having an input and two outputs.
Figs. 2, 3 and 4 illustrate curves showing the difierence in phase between the signals across the output terminals of the phase-shift network for various control settings.
The network shown in Fig. 1 comprises a transformer T, having a primary and a secondary winding. The primary winding has terminals 6 and 8; the secondary winding has terminals 10 and 12. Each winding of the transformer has the same number of turns, and the windings are center tapped at 7 and 11. Terminals 6 and 10 at the lower ends of the transformer windings are connected together and to terminal 2 of a pair of input terminals 2 and 4. The center tap terminals 7 and 11 of the transformer windings are connected together by a control element, for instance, a potentiometer resistor, R1 which has a contact arm 5. The phase-shift network has two sets of output terminals; output terminals 8 and 9, and output terminals 12 and 13. The contact arm 5 of the control element R1 and terminals 9 and 13 of the two Patented Aug. 7, 1956 sets of output terminals are all electrically connected to terminal 4 of the input terminals.
The general operation of the phase-shift network is as follows: A sine wave signal is introduced across input terminals 2 and 4 allowingcurrent/voltage to 'flow into both halves of the transformer T1. At that point, the signals on both'windings are at the same phase angle; that is to say, at-the' start of the windings the signalson the windings are in phase with each other, while at the ends of the windings the signals are 180 degrees out of phase with each other. However, each winding has a center tap which is 'brought out and connected together by-potentiometer resistor R1 having a contact arm 5, which is electrically connected to output terminals 9 and 13 and to input terminal 2. When contact arm 5 is set at center tap the output signals should be approximately degrees out of phase with each other. This is illustrated'in Fig. 2 of the drawing where sine wave A represents the signal at output A across terminals 8 and9 of Fig. '1, and sine wave B represents the signal at output B across terminals 12 and 13. Moving the contact arm 5 from one side of center will lower the effectiveness of that winding, depending on the side to which his moved, while at the same time adding to the efiectivenessof the other winding. 'By effectiveness is meant adding to or strengthening the phase angles within the transformer T1 itself. This results in sine waves appearing across outputterminals 8 and 9 and output terminals 12 and 13 which are out of phase with each other, the number of degrees by which they are out of phase depending-on'the setting of-the'contact arm 5 of potentiometer resistor R1. This may be illustrated in Figs. 3 and 4 of the drawing. Fig. 3 represents the signals across the output terminals when the potentiometer contact arm is moved to the left; sine wave A will then lead sine wave B by some amount depending on the setting of control arm 5. Fig. 4 represents the signals across the output terminals when the potentiometer is moved to the right; sine wave A will then lag sine wave B by an amount depending upon the setting of control arm 5. By using only these two components i. e., a transformer having 1 to 1 ratio and a potentiometer resistor control-element, a simple, single-control, variable, phase-shift network can be constructed which has an unusually wide phase-shift range.
Obviously, many modifications and variations of the present invention are possible in the light of the above teachings. It is therefore to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.
What is claimed is:
1. A single-control variable phase-shift network comprising a transformer having primary and secondary windings, said windings having an equal number of turns and being center tapped, a pair of input terminals, two pairs of output terminals, one end of said primary winding and one end of said secondary winding being connected to one of said input terminals, the other end of said primary winding being connected to one terminal of one pair of said output terminals, the other end of said secondary winding being connected to one terminal of the other pair of said output terminals, a potentiometer connected between the center taps of said primary and secondary windings, the contact arm of said potentiometer and the other terminal of each pair of said output terminals being connected to the other of said input terminals, whereby the phase difference between the voltage appearing across one pair of said output terminals and across the other pair of said output terminals may be varied by the movement of said contact arm of said potentiometer.
2. A voltage phase-shift system comprising a transformer having primary and secondary windings, said windings having an equal number of turns and being center tapped, a pair of input terminals, a first and second pair of output terminals, one end of said primary winding and one end of said secondary winding being connected to one of said input terminals, the other end of said primary winding being connected to one terminal of said first pair of output terminals, the other end of said secondary wind.- ing being connected to one terminal of said second pair of output terminals, a potentiometer connected across the center taps of said primary and secondary windings, the movable contact arm of said potentiometer and the other terminal or" said first and second pairs of output terminals being connected to the other of said input terminals, whereby the phase diiference between the voltage appearing across said first pair of output terminals and the voltage across said second pair of output terminals may be varied by the movement of said contact arm of said potentiometer.
3. A phase-shift system as in claim 2 wherein the phase diiference may be continuously variable from 20 degrees to 355 degrees.
4. A phase-shift system as in claim 2 wherein the lower ends of said primary and secondary windings are connected together and to one of said input terminals.
5. A variable phase-shift network comprising a transformer having primary and secondary windings, said windings each having the same number of turns and being center tapped, a pair of input terminals, a first pair of output terminals and a second pair of output terminals, the lower end of said primary winding and the lower end of said secondary winding being connected together and to one of said input terminals, the other end of said primary winding being connected to one terminal of said first pair of output terminals, the other end of said secondary winding being connected to one terminal of said second pair of output terminals, a control means connected between the center taps of said primary and said secondary windings, a movable contact means on said control means, said movable contact means and the other terminals of said first and second pairs of output terminals being connected to the other of said input terminals, whereby the phase difference between the signal appearing between said first pair of output terminals and the signal appearing between said second pair of output terminals may be varied by the movement of said contact means of said control means.
6. A network as in claim 5 wherein said control means is a potentiometer resistor having a movable contact arm.
7. A phase-shift system as in claim 5 wherein the phase difierence may be varied by said control means from 20 degrees to 355 degrees.
8. A voltage phase-shift system comprising a l to 1 ratio transformer having its primary and secondary windings center tapped, a pair of input terminals and two pairs of output terminals, the lower ends of said primary and said secondary windings being connected to one of said pair of input terminals, the other ends of said windings each being connected to one terminal of a pair of said output terminals, a control element connected between the center taps of said windings, a movable contact arm on said control element, said contact arm and the other terminal of each pair of said output terminals being connected to the other of said input terminals, whereby the difierence in phase between the signals across the output terminals may be varied by moving said contact arm.
No references cited.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US511138A US2758219A (en) | 1955-05-25 | 1955-05-25 | Single-control variable phase-shift network |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US511138A US2758219A (en) | 1955-05-25 | 1955-05-25 | Single-control variable phase-shift network |
Publications (1)
Publication Number | Publication Date |
---|---|
US2758219A true US2758219A (en) | 1956-08-07 |
Family
ID=24033607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US511138A Expired - Lifetime US2758219A (en) | 1955-05-25 | 1955-05-25 | Single-control variable phase-shift network |
Country Status (1)
Country | Link |
---|---|
US (1) | US2758219A (en) |
Cited By (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3154750A (en) * | 1961-04-28 | 1964-10-27 | Charles E David | High frequency phase splitter utilizing bifilar windings |
US3237031A (en) * | 1961-10-05 | 1966-02-22 | English Electric Co Ltd | Inductive reactance device for use in symmetrical component analysers |
US4611172A (en) * | 1982-08-28 | 1986-09-09 | Tokyo Shibaura Denki Kabushiki Kaisha | Reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus |
US4999594A (en) * | 1988-12-09 | 1991-03-12 | Condor, Inc. | AC line filter with tapped balun winding |
FR2697091A1 (en) * | 1992-10-21 | 1994-04-22 | Sagem | Current measurement device by shunt. |
US20090145480A1 (en) * | 2007-12-05 | 2009-06-11 | Meir Adest | Photovoltaic system power tracking method |
US20090206666A1 (en) * | 2007-12-04 | 2009-08-20 | Guy Sella | Distributed power harvesting systems using dc power sources |
US20090273241A1 (en) * | 2008-05-05 | 2009-11-05 | Meir Gazit | Direct Current Power Combiner |
US20100301991A1 (en) * | 2009-05-26 | 2010-12-02 | Guy Sella | Theft detection and prevention in a power generation system |
US20110125431A1 (en) * | 2007-12-05 | 2011-05-26 | Meir Adest | Testing of a Photovoltaic Panel |
US20110121652A1 (en) * | 2006-12-06 | 2011-05-26 | Guy Sella | Pairing of components in a direct current distributed power generation system |
US8988838B2 (en) | 2012-01-30 | 2015-03-24 | Solaredge Technologies Ltd. | Photovoltaic panel circuitry |
US9041339B2 (en) | 2006-12-06 | 2015-05-26 | Solaredge Technologies Ltd. | Battery power delivery module |
US9130401B2 (en) | 2006-12-06 | 2015-09-08 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US9235228B2 (en) | 2012-03-05 | 2016-01-12 | Solaredge Technologies Ltd. | Direct current link circuit |
US9318974B2 (en) | 2014-03-26 | 2016-04-19 | Solaredge Technologies Ltd. | Multi-level inverter with flying capacitor topology |
US9368964B2 (en) | 2006-12-06 | 2016-06-14 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
US9548619B2 (en) | 2013-03-14 | 2017-01-17 | Solaredge Technologies Ltd. | Method and apparatus for storing and depleting energy |
US9564882B2 (en) | 2010-01-27 | 2017-02-07 | Solaredge Technologies Ltd. | Fast voltage level shifter circuit |
US9590526B2 (en) | 2006-12-06 | 2017-03-07 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
US9644993B2 (en) | 2006-12-06 | 2017-05-09 | Solaredge Technologies Ltd. | Monitoring of distributed power harvesting systems using DC power sources |
US9647442B2 (en) | 2010-11-09 | 2017-05-09 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US9673711B2 (en) | 2007-08-06 | 2017-06-06 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
US9680304B2 (en) | 2006-12-06 | 2017-06-13 | Solaredge Technologies Ltd. | Method for distributed power harvesting using DC power sources |
US9812984B2 (en) | 2012-01-30 | 2017-11-07 | Solaredge Technologies Ltd. | Maximizing power in a photovoltaic distributed power system |
US9819178B2 (en) | 2013-03-15 | 2017-11-14 | Solaredge Technologies Ltd. | Bypass mechanism |
US9831824B2 (en) | 2007-12-05 | 2017-11-28 | SolareEdge Technologies Ltd. | Current sensing on a MOSFET |
US9853565B2 (en) | 2012-01-30 | 2017-12-26 | Solaredge Technologies Ltd. | Maximized power in a photovoltaic distributed power system |
US9853538B2 (en) | 2007-12-04 | 2017-12-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US9866098B2 (en) | 2011-01-12 | 2018-01-09 | Solaredge Technologies Ltd. | Serially connected inverters |
US9870016B2 (en) | 2012-05-25 | 2018-01-16 | Solaredge Technologies Ltd. | Circuit for interconnected direct current power sources |
US9876430B2 (en) | 2008-03-24 | 2018-01-23 | Solaredge Technologies Ltd. | Zero voltage switching |
US9935458B2 (en) | 2010-12-09 | 2018-04-03 | Solaredge Technologies Ltd. | Disconnection of a string carrying direct current power |
US9960667B2 (en) | 2006-12-06 | 2018-05-01 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
US10061957B2 (en) | 2016-03-03 | 2018-08-28 | Solaredge Technologies Ltd. | Methods for mapping power generation installations |
US10115841B2 (en) | 2012-06-04 | 2018-10-30 | Solaredge Technologies Ltd. | Integrated photovoltaic panel circuitry |
US10230310B2 (en) | 2016-04-05 | 2019-03-12 | Solaredge Technologies Ltd | Safety switch for photovoltaic systems |
US10270255B2 (en) | 2009-12-01 | 2019-04-23 | Solaredge Technologies Ltd | Dual use photovoltaic system |
US10396662B2 (en) | 2011-09-12 | 2019-08-27 | Solaredge Technologies Ltd | Direct current link circuit |
US10599113B2 (en) | 2016-03-03 | 2020-03-24 | Solaredge Technologies Ltd. | Apparatus and method for determining an order of power devices in power generation systems |
US10673229B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US10673222B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US10931119B2 (en) | 2012-01-11 | 2021-02-23 | Solaredge Technologies Ltd. | Photovoltaic module |
US11018623B2 (en) | 2016-04-05 | 2021-05-25 | Solaredge Technologies Ltd. | Safety switch for photovoltaic systems |
US11081608B2 (en) | 2016-03-03 | 2021-08-03 | Solaredge Technologies Ltd. | Apparatus and method for determining an order of power devices in power generation systems |
US11177663B2 (en) | 2016-04-05 | 2021-11-16 | Solaredge Technologies Ltd. | Chain of power devices |
US11264947B2 (en) | 2007-12-05 | 2022-03-01 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US11296650B2 (en) | 2006-12-06 | 2022-04-05 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
US11309832B2 (en) | 2006-12-06 | 2022-04-19 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11545912B2 (en) | 2013-03-14 | 2023-01-03 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
US11569660B2 (en) | 2006-12-06 | 2023-01-31 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11569659B2 (en) | 2006-12-06 | 2023-01-31 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11687112B2 (en) | 2006-12-06 | 2023-06-27 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11728768B2 (en) | 2006-12-06 | 2023-08-15 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
US11735910B2 (en) | 2006-12-06 | 2023-08-22 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
US11855231B2 (en) | 2006-12-06 | 2023-12-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11881814B2 (en) | 2005-12-05 | 2024-01-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US11888387B2 (en) | 2006-12-06 | 2024-01-30 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
-
1955
- 1955-05-25 US US511138A patent/US2758219A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (148)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3154750A (en) * | 1961-04-28 | 1964-10-27 | Charles E David | High frequency phase splitter utilizing bifilar windings |
US3237031A (en) * | 1961-10-05 | 1966-02-22 | English Electric Co Ltd | Inductive reactance device for use in symmetrical component analysers |
US4611172A (en) * | 1982-08-28 | 1986-09-09 | Tokyo Shibaura Denki Kabushiki Kaisha | Reception signal processing apparatus in nuclear magnetic resonance diagnostic apparatus |
US4999594A (en) * | 1988-12-09 | 1991-03-12 | Condor, Inc. | AC line filter with tapped balun winding |
FR2697091A1 (en) * | 1992-10-21 | 1994-04-22 | Sagem | Current measurement device by shunt. |
EP0594500A1 (en) * | 1992-10-21 | 1994-04-27 | Sagem Sa | Current measuring device with a shunt |
US11881814B2 (en) | 2005-12-05 | 2024-01-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US10097007B2 (en) | 2006-12-06 | 2018-10-09 | Solaredge Technologies Ltd. | Method for distributed power harvesting using DC power sources |
US11594881B2 (en) | 2006-12-06 | 2023-02-28 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11961922B2 (en) | 2006-12-06 | 2024-04-16 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11002774B2 (en) | 2006-12-06 | 2021-05-11 | Solaredge Technologies Ltd. | Monitoring of distributed power harvesting systems using DC power sources |
US20110121652A1 (en) * | 2006-12-06 | 2011-05-26 | Guy Sella | Pairing of components in a direct current distributed power generation system |
US10637393B2 (en) | 2006-12-06 | 2020-04-28 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11031861B2 (en) | 2006-12-06 | 2021-06-08 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
US11888387B2 (en) | 2006-12-06 | 2024-01-30 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
US11043820B2 (en) | 2006-12-06 | 2021-06-22 | Solaredge Technologies Ltd. | Battery power delivery module |
US9041339B2 (en) | 2006-12-06 | 2015-05-26 | Solaredge Technologies Ltd. | Battery power delivery module |
US9112379B2 (en) | 2006-12-06 | 2015-08-18 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
US9130401B2 (en) | 2006-12-06 | 2015-09-08 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11855231B2 (en) | 2006-12-06 | 2023-12-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11594880B2 (en) | 2006-12-06 | 2023-02-28 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11735910B2 (en) | 2006-12-06 | 2023-08-22 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
US11728768B2 (en) | 2006-12-06 | 2023-08-15 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
US9368964B2 (en) | 2006-12-06 | 2016-06-14 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
US11063440B2 (en) | 2006-12-06 | 2021-07-13 | Solaredge Technologies Ltd. | Method for distributed power harvesting using DC power sources |
US9543889B2 (en) | 2006-12-06 | 2017-01-10 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11687112B2 (en) | 2006-12-06 | 2023-06-27 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11682918B2 (en) | 2006-12-06 | 2023-06-20 | Solaredge Technologies Ltd. | Battery power delivery module |
US9590526B2 (en) | 2006-12-06 | 2017-03-07 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
US11658482B2 (en) | 2006-12-06 | 2023-05-23 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US9644993B2 (en) | 2006-12-06 | 2017-05-09 | Solaredge Technologies Ltd. | Monitoring of distributed power harvesting systems using DC power sources |
US11598652B2 (en) | 2006-12-06 | 2023-03-07 | Solaredge Technologies Ltd. | Monitoring of distributed power harvesting systems using DC power sources |
US11073543B2 (en) | 2006-12-06 | 2021-07-27 | Solaredge Technologies Ltd. | Monitoring of distributed power harvesting systems using DC power sources |
US9680304B2 (en) | 2006-12-06 | 2017-06-13 | Solaredge Technologies Ltd. | Method for distributed power harvesting using DC power sources |
US11594882B2 (en) | 2006-12-06 | 2023-02-28 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US10447150B2 (en) | 2006-12-06 | 2019-10-15 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11183922B2 (en) | 2006-12-06 | 2021-11-23 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11579235B2 (en) | 2006-12-06 | 2023-02-14 | Solaredge Technologies Ltd. | Safety mechanisms, wake up and shutdown methods in distributed power installations |
US9853490B2 (en) | 2006-12-06 | 2017-12-26 | Solaredge Technologies Ltd. | Distributed power system using direct current power sources |
US11575260B2 (en) | 2006-12-06 | 2023-02-07 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11296650B2 (en) | 2006-12-06 | 2022-04-05 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
US11962243B2 (en) | 2006-12-06 | 2024-04-16 | Solaredge Technologies Ltd. | Method for distributed power harvesting using DC power sources |
US11575261B2 (en) | 2006-12-06 | 2023-02-07 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US10230245B2 (en) | 2006-12-06 | 2019-03-12 | Solaredge Technologies Ltd | Battery power delivery module |
US11309832B2 (en) | 2006-12-06 | 2022-04-19 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11569659B2 (en) | 2006-12-06 | 2023-01-31 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US11569660B2 (en) | 2006-12-06 | 2023-01-31 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US9948233B2 (en) | 2006-12-06 | 2018-04-17 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US9960731B2 (en) | 2006-12-06 | 2018-05-01 | Solaredge Technologies Ltd. | Pairing of components in a direct current distributed power generation system |
US9960667B2 (en) | 2006-12-06 | 2018-05-01 | Solaredge Technologies Ltd. | System and method for protection during inverter shutdown in distributed power installations |
US9966766B2 (en) | 2006-12-06 | 2018-05-08 | Solaredge Technologies Ltd. | Battery power delivery module |
US10673253B2 (en) | 2006-12-06 | 2020-06-02 | Solaredge Technologies Ltd. | Battery power delivery module |
US11476799B2 (en) | 2006-12-06 | 2022-10-18 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US10116217B2 (en) | 2007-08-06 | 2018-10-30 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
US11594968B2 (en) | 2007-08-06 | 2023-02-28 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
US9673711B2 (en) | 2007-08-06 | 2017-06-06 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
US10516336B2 (en) | 2007-08-06 | 2019-12-24 | Solaredge Technologies Ltd. | Digital average input current control in power converter |
US8963369B2 (en) | 2007-12-04 | 2015-02-24 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US9853538B2 (en) | 2007-12-04 | 2017-12-26 | Solaredge Technologies Ltd. | Distributed power harvesting systems using DC power sources |
US20090206666A1 (en) * | 2007-12-04 | 2009-08-20 | Guy Sella | Distributed power harvesting systems using dc power sources |
US11183923B2 (en) | 2007-12-05 | 2021-11-23 | Solaredge Technologies Ltd. | Parallel connected inverters |
US9291696B2 (en) | 2007-12-05 | 2016-03-22 | Solaredge Technologies Ltd. | Photovoltaic system power tracking method |
US9979280B2 (en) | 2007-12-05 | 2018-05-22 | Solaredge Technologies Ltd. | Parallel connected inverters |
US9831824B2 (en) | 2007-12-05 | 2017-11-28 | SolareEdge Technologies Ltd. | Current sensing on a MOSFET |
US11183969B2 (en) | 2007-12-05 | 2021-11-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US11693080B2 (en) | 2007-12-05 | 2023-07-04 | Solaredge Technologies Ltd. | Parallel connected inverters |
US11264947B2 (en) | 2007-12-05 | 2022-03-01 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US20090145480A1 (en) * | 2007-12-05 | 2009-06-11 | Meir Adest | Photovoltaic system power tracking method |
US11894806B2 (en) | 2007-12-05 | 2024-02-06 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US10644589B2 (en) | 2007-12-05 | 2020-05-05 | Solaredge Technologies Ltd. | Parallel connected inverters |
US20110125431A1 (en) * | 2007-12-05 | 2011-05-26 | Meir Adest | Testing of a Photovoltaic Panel |
US10693415B2 (en) | 2007-12-05 | 2020-06-23 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US9876430B2 (en) | 2008-03-24 | 2018-01-23 | Solaredge Technologies Ltd. | Zero voltage switching |
US11424616B2 (en) | 2008-05-05 | 2022-08-23 | Solaredge Technologies Ltd. | Direct current power combiner |
US20090273241A1 (en) * | 2008-05-05 | 2009-11-05 | Meir Gazit | Direct Current Power Combiner |
US9000617B2 (en) * | 2008-05-05 | 2015-04-07 | Solaredge Technologies, Ltd. | Direct current power combiner |
US10468878B2 (en) | 2008-05-05 | 2019-11-05 | Solaredge Technologies Ltd. | Direct current power combiner |
US9362743B2 (en) | 2008-05-05 | 2016-06-07 | Solaredge Technologies Ltd. | Direct current power combiner |
US9537445B2 (en) | 2008-12-04 | 2017-01-03 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US10461687B2 (en) | 2008-12-04 | 2019-10-29 | Solaredge Technologies Ltd. | Testing of a photovoltaic panel |
US20100301991A1 (en) * | 2009-05-26 | 2010-12-02 | Guy Sella | Theft detection and prevention in a power generation system |
US11867729B2 (en) | 2009-05-26 | 2024-01-09 | Solaredge Technologies Ltd. | Theft detection and prevention in a power generation system |
US10969412B2 (en) | 2009-05-26 | 2021-04-06 | Solaredge Technologies Ltd. | Theft detection and prevention in a power generation system |
US8947194B2 (en) | 2009-05-26 | 2015-02-03 | Solaredge Technologies Ltd. | Theft detection and prevention in a power generation system |
US9869701B2 (en) | 2009-05-26 | 2018-01-16 | Solaredge Technologies Ltd. | Theft detection and prevention in a power generation system |
US10270255B2 (en) | 2009-12-01 | 2019-04-23 | Solaredge Technologies Ltd | Dual use photovoltaic system |
US11735951B2 (en) | 2009-12-01 | 2023-08-22 | Solaredge Technologies Ltd. | Dual use photovoltaic system |
US11056889B2 (en) | 2009-12-01 | 2021-07-06 | Solaredge Technologies Ltd. | Dual use photovoltaic system |
US9564882B2 (en) | 2010-01-27 | 2017-02-07 | Solaredge Technologies Ltd. | Fast voltage level shifter circuit |
US9917587B2 (en) | 2010-01-27 | 2018-03-13 | Solaredge Technologies Ltd. | Fast voltage level shifter circuit |
US10673229B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US10673222B2 (en) | 2010-11-09 | 2020-06-02 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US11489330B2 (en) | 2010-11-09 | 2022-11-01 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US10931228B2 (en) | 2010-11-09 | 2021-02-23 | Solaredge Technologies Ftd. | Arc detection and prevention in a power generation system |
US11070051B2 (en) | 2010-11-09 | 2021-07-20 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US11349432B2 (en) | 2010-11-09 | 2022-05-31 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US9647442B2 (en) | 2010-11-09 | 2017-05-09 | Solaredge Technologies Ltd. | Arc detection and prevention in a power generation system |
US11271394B2 (en) | 2010-12-09 | 2022-03-08 | Solaredge Technologies Ltd. | Disconnection of a string carrying direct current power |
US9935458B2 (en) | 2010-12-09 | 2018-04-03 | Solaredge Technologies Ltd. | Disconnection of a string carrying direct current power |
US10666125B2 (en) | 2011-01-12 | 2020-05-26 | Solaredge Technologies Ltd. | Serially connected inverters |
US9866098B2 (en) | 2011-01-12 | 2018-01-09 | Solaredge Technologies Ltd. | Serially connected inverters |
US11205946B2 (en) | 2011-01-12 | 2021-12-21 | Solaredge Technologies Ltd. | Serially connected inverters |
US10396662B2 (en) | 2011-09-12 | 2019-08-27 | Solaredge Technologies Ltd | Direct current link circuit |
US11979037B2 (en) | 2012-01-11 | 2024-05-07 | Solaredge Technologies Ltd. | Photovoltaic module |
US10931119B2 (en) | 2012-01-11 | 2021-02-23 | Solaredge Technologies Ltd. | Photovoltaic module |
US11929620B2 (en) | 2012-01-30 | 2024-03-12 | Solaredge Technologies Ltd. | Maximizing power in a photovoltaic distributed power system |
US11620885B2 (en) | 2012-01-30 | 2023-04-04 | Solaredge Technologies Ltd. | Photovoltaic panel circuitry |
US10381977B2 (en) | 2012-01-30 | 2019-08-13 | Solaredge Technologies Ltd | Photovoltaic panel circuitry |
US9812984B2 (en) | 2012-01-30 | 2017-11-07 | Solaredge Technologies Ltd. | Maximizing power in a photovoltaic distributed power system |
US11183968B2 (en) | 2012-01-30 | 2021-11-23 | Solaredge Technologies Ltd. | Photovoltaic panel circuitry |
US9853565B2 (en) | 2012-01-30 | 2017-12-26 | Solaredge Technologies Ltd. | Maximized power in a photovoltaic distributed power system |
US10992238B2 (en) | 2012-01-30 | 2021-04-27 | Solaredge Technologies Ltd. | Maximizing power in a photovoltaic distributed power system |
US8988838B2 (en) | 2012-01-30 | 2015-03-24 | Solaredge Technologies Ltd. | Photovoltaic panel circuitry |
US10608553B2 (en) | 2012-01-30 | 2020-03-31 | Solaredge Technologies Ltd. | Maximizing power in a photovoltaic distributed power system |
US9923516B2 (en) | 2012-01-30 | 2018-03-20 | Solaredge Technologies Ltd. | Photovoltaic panel circuitry |
US9639106B2 (en) | 2012-03-05 | 2017-05-02 | Solaredge Technologies Ltd. | Direct current link circuit |
US10007288B2 (en) | 2012-03-05 | 2018-06-26 | Solaredge Technologies Ltd. | Direct current link circuit |
US9235228B2 (en) | 2012-03-05 | 2016-01-12 | Solaredge Technologies Ltd. | Direct current link circuit |
US11740647B2 (en) | 2012-05-25 | 2023-08-29 | Solaredge Technologies Ltd. | Circuit for interconnected direct current power sources |
US10705551B2 (en) | 2012-05-25 | 2020-07-07 | Solaredge Technologies Ltd. | Circuit for interconnected direct current power sources |
US9870016B2 (en) | 2012-05-25 | 2018-01-16 | Solaredge Technologies Ltd. | Circuit for interconnected direct current power sources |
US11334104B2 (en) | 2012-05-25 | 2022-05-17 | Solaredge Technologies Ltd. | Circuit for interconnected direct current power sources |
US11177768B2 (en) | 2012-06-04 | 2021-11-16 | Solaredge Technologies Ltd. | Integrated photovoltaic panel circuitry |
US10115841B2 (en) | 2012-06-04 | 2018-10-30 | Solaredge Technologies Ltd. | Integrated photovoltaic panel circuitry |
US10778025B2 (en) | 2013-03-14 | 2020-09-15 | Solaredge Technologies Ltd. | Method and apparatus for storing and depleting energy |
US11545912B2 (en) | 2013-03-14 | 2023-01-03 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
US9548619B2 (en) | 2013-03-14 | 2017-01-17 | Solaredge Technologies Ltd. | Method and apparatus for storing and depleting energy |
US11742777B2 (en) | 2013-03-14 | 2023-08-29 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
US9819178B2 (en) | 2013-03-15 | 2017-11-14 | Solaredge Technologies Ltd. | Bypass mechanism |
US10651647B2 (en) | 2013-03-15 | 2020-05-12 | Solaredge Technologies Ltd. | Bypass mechanism |
US11424617B2 (en) | 2013-03-15 | 2022-08-23 | Solaredge Technologies Ltd. | Bypass mechanism |
US9318974B2 (en) | 2014-03-26 | 2016-04-19 | Solaredge Technologies Ltd. | Multi-level inverter with flying capacitor topology |
US11632058B2 (en) | 2014-03-26 | 2023-04-18 | Solaredge Technologies Ltd. | Multi-level inverter |
US10886832B2 (en) | 2014-03-26 | 2021-01-05 | Solaredge Technologies Ltd. | Multi-level inverter |
US10886831B2 (en) | 2014-03-26 | 2021-01-05 | Solaredge Technologies Ltd. | Multi-level inverter |
US11296590B2 (en) | 2014-03-26 | 2022-04-05 | Solaredge Technologies Ltd. | Multi-level inverter |
US11855552B2 (en) | 2014-03-26 | 2023-12-26 | Solaredge Technologies Ltd. | Multi-level inverter |
US11824131B2 (en) | 2016-03-03 | 2023-11-21 | Solaredge Technologies Ltd. | Apparatus and method for determining an order of power devices in power generation systems |
US10540530B2 (en) | 2016-03-03 | 2020-01-21 | Solaredge Technologies Ltd. | Methods for mapping power generation installations |
US10599113B2 (en) | 2016-03-03 | 2020-03-24 | Solaredge Technologies Ltd. | Apparatus and method for determining an order of power devices in power generation systems |
US11081608B2 (en) | 2016-03-03 | 2021-08-03 | Solaredge Technologies Ltd. | Apparatus and method for determining an order of power devices in power generation systems |
US10061957B2 (en) | 2016-03-03 | 2018-08-28 | Solaredge Technologies Ltd. | Methods for mapping power generation installations |
US11538951B2 (en) | 2016-03-03 | 2022-12-27 | Solaredge Technologies Ltd. | Apparatus and method for determining an order of power devices in power generation systems |
US11177663B2 (en) | 2016-04-05 | 2021-11-16 | Solaredge Technologies Ltd. | Chain of power devices |
US11870250B2 (en) | 2016-04-05 | 2024-01-09 | Solaredge Technologies Ltd. | Chain of power devices |
US11018623B2 (en) | 2016-04-05 | 2021-05-25 | Solaredge Technologies Ltd. | Safety switch for photovoltaic systems |
US10230310B2 (en) | 2016-04-05 | 2019-03-12 | Solaredge Technologies Ltd | Safety switch for photovoltaic systems |
US11201476B2 (en) | 2016-04-05 | 2021-12-14 | Solaredge Technologies Ltd. | Photovoltaic power device and wiring |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2758219A (en) | Single-control variable phase-shift network | |
US2671883A (en) | Wave guide impedance transformer | |
US2781967A (en) | Computing apparatus | |
GB1141531A (en) | Improvements in or relating to electromagnetic wave attenuators | |
US3356962A (en) | Frequency selective amplifier-oscillator having multiple feedback paths | |
US3295052A (en) | D. c. regulation circuit | |
US2610789A (en) | Triangle solver | |
US2754473A (en) | Half-wave bridge magnetic amplifier | |
US2762008A (en) | Rectifier | |
US2920217A (en) | Arbitrary waveform generator | |
US2842733A (en) | Function generator | |
US2766413A (en) | Position-sensitive probe circuit | |
GB855638A (en) | Improved device for adjusting the gain or attenuation of an electric wave | |
US2022968A (en) | Frequency changing system | |
US2883614A (en) | Electrical apparatus | |
US2999973A (en) | Transformer apparatus | |
US2710723A (en) | Fuse computer | |
US2923784A (en) | Artificial transformer | |
US2857564A (en) | Voltage balancing system | |
US2759109A (en) | Phase discriminator | |
US2900458A (en) | Method of eliminating scaling errors in analog computation | |
US3025442A (en) | Switching transmitter positioning of synchros | |
US4092582A (en) | Electrical coupling arrangements | |
US3270275A (en) | Adjustable range reference signal circuit | |
US2598312A (en) | Sine and cosine function voltage device |