Patents by Inventor Jürgen Biela
Jürgen Biela has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9331561Abstract: Disclosed is a method for the improvement of the line quality in a system, in which a common feeding (1), via at least one distribution transformer (3), feeds at least two non-linear loads (11) drawing non-sinusoidal currents from the common feeding (1), wherein between the common feeding (1) and the distribution transformer (3) there is at least one primary side transformer line (2) and between the at least one distribution transformer (3) and the loads (11) there is at least one lower voltage secondary side transformer line (22), wherein at least one active filter (24) attached to at least one lower voltage secondary side transformer line (22) is used for the attenuation or elimination of higher order harmonics experienced by the common feeding (1). Furthermore a high power distribution system for use of such a method is disclosed, in particular for the operation of an electrostatic precipitator.Type: GrantFiled: June 1, 2011Date of Patent: May 3, 2016Assignee: ALSTOM Technology LtdInventors: Johann Walter Kolar, Thiago Batista Soeiro, Jürgen Biela, Per Ranstad, Jörgen Linner
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Patent number: 9325300Abstract: The disclosure relates to a method for the scheduling and/or the operation of a system of at least two power supplies (11) providing DC pulses to a consumer (5), typically an electrostatic precipitator, wherein the power supplies (11) are energized by a common feeding (1). According to the proposed method one power supply (11) is defined to be the reference power supply, and the initial pulses of each further power supply (11) are shifted by controlled delays (?Pri) with respect to the pulses of the reference power supply so as to fill the gaps between the pulses of the reference power supply by the pulses of the further power supplies (11).Type: GrantFiled: June 17, 2011Date of Patent: April 26, 2016Assignee: ALSTOM Technology LtdInventors: Per Ranstad, Jörgen Linner, Jürgen Biela, Thiago Batista Soeiro
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Patent number: 8912840Abstract: A switching device for switching a current between a first connection and a second connection including a series circuit of at least two JFETs (J1-Jn), with further JFETs (J2-Jn), which are connected in series to a lowest JFET (J1), and wherein a wiring network for stabilizing the gate voltages of the JFETs (J1-Jn) is connected between the second connection and the first termination. One additional circuit is connected between each gate connection (GJ2, GJ3 . . . GjN) of the further JFETs (J2-Jn) and associated cathode connections of diodes (DAV) of the wiring network. During switch-on and in the switched-on state, said additional circuit keeps the potential of the respective gate connection higher than the potential of the associated source connection.Type: GrantFiled: April 6, 2011Date of Patent: December 16, 2014Assignee: Eth Zurich, Eth TransferInventors: Daniel Aggeler, Jürgen Biela, Johann Walter Kolar
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Patent number: 8760214Abstract: The invention relates to a switching device for switching a current between a first connection (1) and a second connection (2), comprising a series connection of at least two JFETs (J1-J6), of which a lowest JFET (J1) is connected to the first connection (1), or the lowest JFET (J1) is connected in a cascade circuit to the first connection (1) via a control switch (M), and at least one further JFET (J2-J5), which is connected in series to the lowest JFET (J1), wherein the JFET (J6) farthest away from the lowest JFET (J1) is referred to as the uppermost JFET (J6) and is connected with the drain connection to the second connection (2), and wherein a stabilization circuit (D11-D53) is connected between the gate connections of the JFETs (J1-J6) and the first connection (1) in order to stabilize the gate voltages of the JFETs (J1-J6).Type: GrantFiled: February 3, 2010Date of Patent: June 24, 2014Assignee: ETH ZurichInventors: Jürgen Biela, Johann W. Kolar, Daniel Aggeler
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Patent number: 8723589Abstract: A switching device for switching a current between a first terminal (1) and a second terminal (2) comprises a cascode circuit having a series connection of a first semiconductor switch (M) and a second semiconductor switch (J), wherein the two semiconductor switches (M, J) are connected to each other by a common point (13), and the first semiconductor switch (M) is controlled by way of a first control input in accordance with a voltage between the first control input and the first terminal (1), and the second semiconductor switch (J) is controlled by way of a second control input (4) in accordance with a voltage between the second control input (4) and the common point (13). To this end, a control circuit having a specifiable capacitance (C) is connected between the second terminal (2) and at least one of the control input.Type: GrantFiled: March 22, 2010Date of Patent: May 13, 2014Assignee: ETH ZurichInventors: Jürgen Biela, Johann W. Kolar, Daniel Aggeler
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Publication number: 20130201727Abstract: Disclosed is a method for the improvement of the line quality in a system, in which a common feeding (1), via at least one distribution transformer (3), feeds at least two non-linear loads (11) drawing non-sinusoidal currents from the common feeding (1), wherein between the common feeding (1) and the distribution transformer (3) there is at least one primary side transformer line (2) and between the at least one distribution transformer (3) and the loads (11) there is at least one lower voltage secondary side transformer line (22), wherein at least one active filter (24) attached to at least one lower voltage secondary side transformer line (22) is used for the attenuation or elimination of higher order harmonics experienced by the common feeding (1). Furthermore a high power distribution system for use of such a method is disclosed, in particular for the operation of an electrostatic precipitator.Type: ApplicationFiled: June 1, 2011Publication date: August 8, 2013Applicant: ALSTOM TECHNOLOGY LTDInventors: Johann Walter Kolar, Thiago Batista Soeiro, Jürgen Biela, Per Ranstad, Jörgen Linner
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Publication number: 20130194015Abstract: The disclosure relates to a method for the scheduling and/or the operation of a system of at least two power supplies (11) providing DC pulses to a consumer (5), typically an electrostatic precipitator, wherein the power supplies (11) are energised by a common feeding (1). According to the proposed method one power supply (11) is defined to be the reference power supply, and the initial pulses of each further power supply (11) are shifted by controlled delays (?Pri) with respect to the pulses of the reference power supply so as to fill the gaps between the pulses of the reference power supply by the pulses of the further power supplies (11).Type: ApplicationFiled: June 17, 2011Publication date: August 1, 2013Applicant: ALSTOM TECHNOLOGY LTDInventors: Per Ranstad, Jögen Linner, Jürgen Biela, Thiago Batista Soeiro
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Publication number: 20130057332Abstract: A switching device for switching a current between a first connection and a second connection including a series circuit of at least two JFETs (J1-Jn), with further JFETs (J2-Jn), which are connected in series to a lowest JFET (J1), and wherein a wiring network for stabilizing the gate voltages of the JFETs (J1-Jn) is connected between the second connection and the first termination. One additional circuit is connected between each gate connection (GJ2, GJ3 . . . GjN) of the further JFETs (J2-Jn) and associated cathode connections of diodes (DAV) of the wiring network. During switch-on and in the switched-on state, said additional circuit keeps the potential of the respective gate connection higher than the potential of the associated source connection.Type: ApplicationFiled: April 6, 2011Publication date: March 7, 2013Applicant: ETH ZURICHInventors: Daniel Aggeler, Jürgen Biela, Johann Walter Kolar
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Publication number: 20120105131Abstract: A switching device for switching a current between a first terminal (1) and a second terminal (2) comprises a cascode circuit having a series connection of a first semiconductor switch (M) and a second semiconductor switch (J), wherein the two semiconductor switches (M, J) are connected to each other by a common point (13), and the first semiconductor switch (M) is controlled by way of a first control input in accordance with a voltage between the first control input and the first terminal (1), and the second semiconductor switch (J) is controlled by way of a second control input (4) in accordance with a voltage between the second control input (4) and the common point (13). To this end, a control circuit having a specifiable capacitance (C) is connected between the second terminal (2) and at least one of the control input.Type: ApplicationFiled: March 22, 2010Publication date: May 3, 2012Applicant: ETH ZürichInventors: Jürgen Biela, Johann W. Kolar, Daniel Aggeler
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Publication number: 20110291738Abstract: The invention relates to a switching device for switching a current between a first connection (1) and a second connection (2), comprising a series connection of at least two JFETs (J1-J6), of which a lowest JFET (J1) is connected to the first connection (1), or the lowest JFET (J1) is connected in a cascade circuit to the first connection (1) via a control switch (M), and at least one further JFET (J2-J5), which is connected in series to the lowest JFET (J1), wherein the JFET (J6) farthest away from the lowest JFET (J1) is referred to as the uppermost JFET (J6) and is connected with the drain connection to the second connection (2), and wherein a stabilization circuit (D11-D53) is connected between the gate connections of the JFETs (J1-J6) and the first connection (1) in order to stabilize the gate voltages of the JFETs (J1-J6).Type: ApplicationFiled: February 3, 2010Publication date: December 1, 2011Applicant: ETH ZURICHInventors: Jürgen Biela, Johann W. Kolar, Daniel Aggeler