Patents by Inventor Walter Koellner
Walter Koellner 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: 8550008Abstract: Retard energy regenerated from an electrical motor during braking action is reinjected into a power system via trolley lines. The retard energy may be transmitted to a bidirectional electric substation and returned to a utility grid. The retard energy may also be transmitted to an auxiliary energy storage system, such as an ultracapacitor system or a battery system. Installing trolley lines for mining haul trucks on a downhill slope may be used to capture and re-use substantial quantities of retard energy.Type: GrantFiled: March 21, 2012Date of Patent: October 8, 2013Assignee: Siemens Industry, Inc.Inventors: Joy Mazumdar, Walter Koellner
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Patent number: 8550007Abstract: Retard energy regenerated from an electrical motor during braking action is reinjected into a power system via trolley lines. The retard energy may be transmitted to a bidirectional electric substation and returned to a utility grid. The retard energy may also be transmitted to an auxiliary energy storage system, such as an ultracapacitor system or a battery system. Installing trolley lines for mining haul trucks on a downhill slope may be used to capture and re-use substantial quantities of retard energy.Type: GrantFiled: October 23, 2009Date of Patent: October 8, 2013Assignee: Siemens Industry, Inc.Inventors: Joy Mazumdar, Walter Köllner
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Patent number: 8536814Abstract: The maximum electrical power drawn from an electrical power source by a mining excavator comprising electric motors is reduced by supplying supplementary electrical power from an electrical energy storage unit. The input electrical power drawn by the mining excavator is cyclic. An upper limit is set for the electrical power drawn from the electrical power source. When the input electrical power drawn by the mining excavator exceeds the upper limit, electrical power is supplied by the electrical energy storage unit, such as an ultracapacitor bank. The ultracapacitor bank may be charged by the electrical power source during off-peak intervals. Electrical power generated by electrical motors operating in a regeneration interval may also be recaptured and stored in the electrical energy storage unit.Type: GrantFiled: May 8, 2012Date of Patent: September 17, 2013Assignees: Siemens Industry, Inc., Caterpillar Global Mining LLC, Siemens AktiengesellschaftInventors: Joy Mazumdar, Walter Köllner, Andreas Holweck, Michael G. Onsager, Ekkehard Pittius
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Patent number: 8499909Abstract: A mining haul truck driven by electrical wheel motors is powered by a trolley power system during an uphill climb. Retard energy captured during braking action on either the uphill climb or downhill descent is stored by an on-board electrical energy storage system. Electrical power is supplied from the on-board electrical energy storage system to reduce the peak power demand on the trolley power system during the uphill climb. One implementation of the on-board electrical energy storage system uses an ultracapacitor system.Type: GrantFiled: October 23, 2009Date of Patent: August 6, 2013Assignee: Siemens Industry, Inc.Inventors: Joy Mazumdar, Walter Köllner
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Publication number: 20120257424Abstract: The maximum electrical power drawn from an electrical power source by a mining excavator comprising electric motors is reduced by supplying supplementary electrical power from an electrical energy storage unit. The input electrical power drawn by the mining excavator is cyclic. An upper limit is set for the electrical power drawn from the electrical power source. When the input electrical power drawn by the mining excavator exceeds the upper limit, electrical power is supplied by the electrical energy storage unit, such as an ultracapacitor bank. The ultracapacitor bank may be charged by the electrical power source during off-peak intervals. Electrical power generated by electrical motors operating in a regeneration interval may also be recaptured and stored in the electrical energy storage unit.Type: ApplicationFiled: May 8, 2012Publication date: October 11, 2012Inventors: Joy Mazumdar, Walter Köllner, Andreas Holweck, Michael G. Onsager, Ekkehard Pittius
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Publication number: 20120175209Abstract: Retard energy regenerated from an electrical motor during braking action is reinjected into a power system via trolley lines. The retard energy may be transmitted to a bidirectional electric substation and returned to a utility grid. The retard energy may also be transmitted to an auxiliary energy storage system, such as an ultracapacitor system or a battery system. Installing trolley lines for mining haul trucks on a downhill slope may be used to capture and re-use substantial quantities of retard energy.Type: ApplicationFiled: March 21, 2012Publication date: July 12, 2012Applicant: SIEMENS INDUSTRY, INC.Inventors: Joy Mazumdar, Walter Köllner
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Patent number: 8174225Abstract: The maximum electrical power drawn from an electrical power source by a mining excavator comprising electric motors is reduced by supplying supplementary electrical power from an electrical energy storage unit. The input electrical power drawn by the mining excavator is cyclic. An upper limit is set for the electrical power drawn from the electrical power source. When the input electrical power drawn by the mining excavator exceeds the upper limit, electrical power is supplied by the electrical energy storage unit, such as an ultracapacitor bank. The ultracapacitor bank may be charged by the electrical power source during off-peak intervals. Electrical power generated by electrical motors operating in a regeneration interval may also be recaptured and stored in the electrical energy storage unit.Type: GrantFiled: May 15, 2009Date of Patent: May 8, 2012Assignee: Siemens Industry, Inc.Inventors: Joy Mazumdar, Walter Köllner, Andreas Holweck, Michael G. Onsager, Ekkehard Pittius
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Publication number: 20110094808Abstract: A mining haul truck driven by electrical wheel motors is powered by a trolley power system during an uphill climb. Retard energy captured during braking action on either the uphill climb or downhill descent is stored by an on-board electrical energy storage system. Electrical power is supplied from the on-board electrical energy storage system to reduce the peak power demand on the trolley power system during the uphill climb. One implementation of the on-board electrical energy storage system uses an ultracapacitor system.Type: ApplicationFiled: October 23, 2009Publication date: April 28, 2011Applicant: Siemens Industry, Inc.Inventors: Joy Mazumdar, Walter Köllner
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Publication number: 20110094841Abstract: Retard energy regenerated from an electrical motor during braking action is reinjected into a power system via trolley lines. The retard energy may be transmitted to a bidirectional electric substation and returned to a utility grid. The retard energy may also be transmitted to an auxiliary energy storage system, such as an ultracapacitor system or a battery system. Installing trolley lines for mining haul trucks on a downhill slope may be used to capture and re-use substantial quantities of retard energy.Type: ApplicationFiled: October 23, 2009Publication date: April 28, 2011Applicant: Siemens Industry, Inc.Inventors: Joy Mazumdar, Walter Köllner
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Publication number: 20100289443Abstract: The maximum electrical power drawn from an electrical power source by a mining excavator comprising electric motors is reduced by supplying supplementary electrical power from an electrical energy storage unit. The input electrical power drawn by the mining excavator is cyclic. An upper limit is set for the electrical power drawn from the electrical power source. When the input electrical power drawn by the mining excavator exceeds the upper limit, electrical power is supplied by the electrical energy storage unit, such as an ultracapacitor bank. The ultracapacitor bank may be charged by the electrical power source during off-peak intervals. Electrical power generated by electrical motors operating in a regeneration interval may also be recaptured and stored in the electrical energy storage unit.Type: ApplicationFiled: May 15, 2009Publication date: November 18, 2010Inventors: Joy Mazumdar, Walter Köllner, Andreas Holweck, Micheal G. Onsager, Ekkehard Pittius
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Patent number: 7398012Abstract: Certain exemplary embodiments can include a static DC electric drive system for mining equipment. The drive system can include: an active front end adapted to receive an AC voltage and output a substantially constant DC voltage; and a DC chopper coupled to the active front end, the DC chopper adapted to receive the substantially constant DC voltage and output a variable DC voltage.Type: GrantFiled: May 11, 2005Date of Patent: July 8, 2008Assignee: Siemens Energy & Automation, Inc.Inventor: Walter Koellner
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Patent number: 7024805Abstract: A dragline excavating machine includes a gearless direct drive AC drive motor for driving each of the hoist and the drag drums in the system. The gearless AC motor is driven using a digital system which receives AC power from the utility system rectifies the power using active front end circuits, and converts the resultant DC to a frequency controlled AC using an inverter circuit. The resultant AC signal is employed to drive the gearless AC motor, resulting in reduced harmonic distortion, unity or leading power factor, and increased efficiency, reduced operating costs, and reduced mean time between failure.Type: GrantFiled: July 17, 2003Date of Patent: April 11, 2006Assignee: Bucyrus International, Inc.Inventors: Michael G. Onsager, Carl D. Gilmore, Walter Koellner
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Publication number: 20050254801Abstract: Certain exemplary embodiments can include a static DC electric drive system for mining equipment. The drive system can include: an active front end adapted to receive an AC voltage and output a substantially constant DC voltage; and a DC chopper coupled to the active front end, the DC chopper adapted to receive the substantially constant DC voltage and output a variable DC voltage.Type: ApplicationFiled: May 11, 2005Publication date: November 17, 2005Inventor: Walter Koellner
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Publication number: 20050253551Abstract: Certain exemplary embodiments can include a static DC electric drive system for mining equipment. The drive system can include: an active front end adapted to receive an AC voltage and output a substantially constant DC voltage; and a DC chopper coupled to the active front end, the DC chopper adapted to receive the substantially constant DC voltage and output a variable DC voltage.Type: ApplicationFiled: May 11, 2005Publication date: November 17, 2005Inventor: Walter Koellner
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Publication number: 20040055185Abstract: A dragline excavating machine includes a gearless direct drive AC drive motor for driving each of the hoist and the drag drums in the system. The gearless AC motor is driven using a digital system which receives AC power from the utility system rectifies the power using active front end circuits, and converts the resultant DC to a frequency controlled AC using an inverter circuit. The resultant AC signal is employed to drive the gearless AC motor, resulting in reduced harmonic distortion, unity or leading power factor, and increased efficiency, reduced operating costs, and reduced mean time between failure.Type: ApplicationFiled: July 17, 2003Publication date: March 25, 2004Inventors: Michael G. Onsager, Carl D. Gilmore, Walter Koellner