Patents prior to 2001

Inventors	Assignee	Title	Date	Patent / Applic. No.	Country
J. W. Kolar	J. W. Kolar	Apparatus for Reducing the Switching-On Losses (in Rush Losses) of a Unidirectional Three-Point Pulse-Controlled Rectifier System	2000-11-24	AT409319	AT
J. Miniböck, J. W. Kolar	J. W. Kolar	Verfahren zur Maximierung des Wirkungsgrades zweistufiger Stromversorgungssysteme	2000-11-24	AT411505	AT
J. W. Kolar	J. W. Kolar	Verfahren zur Minimierung der schaltfrequenten Netzstromoberschwingungen einer Dreieckschaltung einphasiger Pulsgleichrichtersysteme	2000-11-24	AT412179	AT
F. Stögerer, J. Miniböck, J. W. Kolar	J. W. Kolar	Multipliziererfreie Phasenstromregelung für unidirektionale Dreiphasen-Dreipunkt-Pulsgleichrichtersysteme mit weitem Aussteuerbereich	2000-10-06	AT411507	AT
J. W. Kolar	J. W. Kolar	Vorrichtung zur Erzeugung der Sollwerte der Eingangsströme und der Netzspannungsvorsteuersignale der Eingangsstromregelung eines Dreiphasen-Dreipunkt-Pulsgleichrichtersystems bei Unsymmetrie des speisenden Netzes	2000-09-11	AT411414	AT
J. Ertl, J. W. Kolar	J. W. Kolar	Three-Phase Pulsed Rectifier System with Little Reaction on the Mains System, for a High Input Voltage	2000-05-29	AT408496	AT
J. W. Kolar, J. Ertl	J. Ertl	Device for Generating a Predeterminable Voltage Profile with a High Pulse Power and Limiting Frequency	2000-05-26	AT409054	AT
J. W. Kolar, J. Miniböck	Bartronics Inc.	Method and Apparatus for Stabilization and Minimization of Losses of a Series Connection of DC/DC-Converters Connected to the Output-Side Partial Voltages of a Three-Level Pwm Rectifier System	2000-01-10	WO0152397	WO, AU
J. W. Kolar	Ascom Energy Systems AG	Three Phase-Electrical Intermediate Circuit having Reduced Network Feedback-Identical Pulse-Director System with a Wide Positioning Range Pertaining to the Output Voltage	2000-01-05	WO0150583	WO, US, EP, DE, AU
J. W. Kolar, J. Miniböck	Bartronics Inc.	A Method and Apparatus for Parallel Operation of Electronic Power Switches	1999-08-13	WO0113519	WO, AU, AT
J. W. Kolar, J. Miniböck	Bartronics Inc.	Apparatus for Increasing the Voltage Utilization of Three-Phase PWM Rectifier Systems with Connection Between Output Center Point and Artificial Mains Star Point	1999-07-13	WO0103490	WO, AU, AT
J. W. Kolar, U. Drofenik	J. W. Kolar	Selbsttätige Einprägung sinusförmiger Netzphasenströme bei Dreiphasenpulsgleichrichtersystemen	1999-05-28	AT412374	AT
W. Korb, J. W. Kolar	W. Korb, J. W. Kolar	Device and Method for Line-Voltage Dependent Thyristor Controlled Pre-Charging of Output Capacitors in a Three-Level Pulse Rectifier System	1999-05-17	WO0070735	WO, US, EP, DE, AU, AT
J. W. Kolar, H. Ertl		Breitband-Hybrid-Leistungsverstärker mit hohem Wirkungsgrad	1999-03-24
F. Stögerer, J. W. Kolar, J. Ertl	J. W. Kolar	Apparatus for Earth Short Fault Identification (Earth Leakage Current Detection) in Three-Point Pulse-Controlled Rectifier Systems by Modified Neutral Point Current Measurement in the Zero and Full-Voltage States	1999-02-12	AT409317	AT
R. Wieser, J. W. Kolar	J. W. Kolar	Verfahren zur stossfreien Serien-Parallel-Umschaltung der Stator-Teilwicklungssysteme einer Drehstrom-Asynchronmaschine	1999-02-05	AT502434	AT
J. W. Kolar, M. Schrödl	J. W. Kolar	Apparatus for Series/Parallel Conversion of Converter-Fed Winding Element Systems of a Three-Phase Machine, and Connection of the Converter Outputs to a Voltage Stabilizing Store	1998-11-03	AT408497	AT
J. W. Kolar	J. W. Kolar	Method and Apparatuses for Detecting and Regulating a DC Component of the Magnetization Current of High-Frequency Power Transformers in Converter Circuits	1998-10-14	AT408393	AT
J. W. Kolar	J. W. Kolar	Single-Stage Three-Phase Pulse-Controlled Converter System with a DC-Isolated Output Circuit and a Stabilized Output Current	1998-06-25	AT408168	AT
T. Wolfbank, J. W. Kolar	J. W. Kolar	Control Method for Avoiding a Common-Mode Shift in the Output Voltage of Three-Phase, Three-Point Pulse-Controlled Converter Systems	1998-01-21	AT408295	AT
J. W. Kolar, T. Wolbank	J. W. Kolar	Bidirectional Converter System for Mains Coupling, with Little Reaction, of a DC Voltage Intermediate-Circuit Pulse-Controlled Inverter System	1997-11-21	AT407456	AT
J. Ertl, J. W. Kolar	J. W. Kolar	DC/DC Voltage Converter with Automatic Balancing of the Supplying Input Voltage Elements	1997-04-01	AT406432	AT
J. W. Kolar	ABB Patent GmbH	Device for Transforming a Three-Phase Voltage System	1997-02-10	WO9835429	WO, US, EP, DE, AT
J. W. Kolar	J. W. Kolar	Pulsed DC/DC Voltage Converter Having Little Ripple in the Input or Output Current	1997-02-10	AT406433	AT
J. Ertl, J. W. Kolar	J. W. Kolar	Apparatus and Method for Low-Loss Active Limiting of the Terminal Voltage of a Unidirectional DC Voltage Supply Device	1996-04-22	AT405587	AT
J. Ertl, U. Drofenik, J. W. Kolar	J. W. Kolar	Apparatus for Simulating the Phase Currents of a Three Phase, Three-Point Pulsed Rectifier System	1996-02-02	AT405586	AT
J. W. Kolar		Weitbereichs-Dreiphasen-Dreipunktpulsgleichrichtersystem	1996-01-23
G. Kamath, N. Mohan, J. W. Kolar	University of Minnesota	Synchronization of the Switching Action of Hysteresis Current Controlled Parallel Connected Power Electronics Systems	1995-06-16	US5892352	US, AT
J. Ertl, J. W. Kolar	J. W. Kolar	Broadband Hybrid Power Amplifier having a High Efficiency	1995-03-14	AT404892	AT
J. W. Kolar	J. W. Kolar	Control of a Three-Phase, Three-Point Pulsed Rectifier System	1994-09-01	AT406624	AT
J. W. Kolar	Spitzenberger and Spies GmbH	Active Filtering Device for Distorted Harmonic-Containing Voltage Waveform of Current Supply System	1994-07-20	DE19526359	DE, AT
J. W. Kolar	IXYS Semiconductor GmbH	Device and Method for Transforming Three-Phase AC Current into DC Current	1993-12-23	EP0660498	EP, DE, AT
J. Ertl, J. W. Kolar	Fronius Schweissmaschinen KG	Control Device for Supplying Power to a Load Circuit of a DC Load, and a Method for Operating such a Control Device	1992-10-14	AT402133	AT
J. W. Kolar, J. Ertl, F. Zach	Siemes AG Österreich	Flyback Converter	1991-09-05	AT399432	AT
J. W. Kolar, J. Ertl	Fronius Schweissmaschinen KG	AC-DC Converter for a D.C. Voltage Consumer and a Method for Supplying the Consumer	1991-07-10	GB2258958	DE, GB FR, AT
F. Zach, J. W. Kolar, J. Ertl	Siemes AG Österreich	Drive Circuit for a Pulse Converter	1990-07-18	AT395664	AT
F. Zach, J. W. Kolar, J. Ertl	F. Zach	Measurement Device for Mixed Currents of Defined Origin	1990-07-18	AT397741	AT
J. W. Kolar, F. Zach, J. Ertl	Fronius Schweissmaschinen KG	Control Method for Three-Phase Bi-Directional Pulse Converters with a High Clock Rate	1989-10-09	AT401450	AT
F. Zach, J. W. Kolar, J. Ertl	Fronius Schweissmaschinen KG	Arrangement for Magnetic Information Transmission Systems, in Particular Pulse Transformers	1989-06-06	AT398862	AT
F. Zach, J. W. Kolar, J. Ertl	F. Zach	Drive Circuit for an Electronic Power Switch	1989-06-06	AT398869	AT
J. W. Kolar, F. Haselsteiner	Siemes AG Österreich	Apparatus for Conversion of Direct Current	1987-11-12	AT388064	AT
J. W. Kolar, J. Ertl	Siemes AG Österreich	Converter Circuit for Bi-Directional Energy Flow	1987-05-08	AT388630	AT

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