Patents by Inventor Waldemar Kowalski
Waldemar Kowalski 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).
-
Patent number: 10218236Abstract: An electrodynamic machine includes a housing and a rotor, as well as a neutral point, wherein the neutral point is located inside the housing and the neutral point ends are interconnected by means of shorting bridges, and the shorting bridges are designed such that the neutral point ends inside the generator housing are electrically isolated from each other.Type: GrantFiled: February 20, 2014Date of Patent: February 26, 2019Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Waldemar Kowalski, Christoph Lehmann
-
Patent number: 9866090Abstract: An electric machine such as for example, an electric generator, is provided having a lock system which enables a monitoring device to be housed in the machine such that the generator is not required to be purged. The machine, which can be filled with a gas, with a housing, wherein a first chamber is arranged on the housing, wherein a first flap valve is arranged between the housing and the first chamber, creating a fluidic connection between said housing and first chamber, and a second chamber which is arranged on the first chamber, wherein a second flap valve is arranged between the first and the second chambers, creating a fluidic connection between said first chamber and second chamber, wherein a monitoring device for inspection purposes is provided in the housing.Type: GrantFiled: June 17, 2013Date of Patent: January 9, 2018Assignee: Siemens AktiegesellschaftInventors: Waldemar Kowalski, Christoph Lehmann
-
Patent number: 9847700Abstract: A monitoring system for monitoring an electric machine is provided. A mini-camera for observing the electric machine is arranged inside the electric machine. Moreover, the mini-camera is arranged movably on guide elements, wherein the guide element is designed in such a way that the mini-camera is held in an uncritical parked position during the operation of the electric machine.Type: GrantFiled: June 11, 2013Date of Patent: December 19, 2017Assignee: Siemens AktiengesellschaftInventors: Waldemar Kowalski, Christoph Lehmann
-
Patent number: 9712013Abstract: A winding for an electric machine is provided. The electric machine includes conductor bars which are arranged one above the other and each of which has a cooling slot. The conductor bars are designed such that the height of the conductor bars increases in the radial direction and the effective cooling cross-section decreases in the radial direction.Type: GrantFiled: June 21, 2013Date of Patent: July 18, 2017Assignee: Siemens AktiengesellschaftInventors: Waldemar Kowalski, Christoph Lehmann
-
Publication number: 20160006312Abstract: An electrodynamic machine includes a housing and a rotor, as well as a neutral point, wherein the neutral point is located inside the housing and the neutral point ends are interconnected by means of shorting bridges, and the shorting bridges are designed such that the neutral point ends inside the generator housing are electrically isolated from each other.Type: ApplicationFiled: February 20, 2014Publication date: January 7, 2016Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Waldemar Kowalski, Christoph Lehmann
-
Publication number: 20150207385Abstract: An electric machine such as for example, an electric generator, is provided having a lock system which enables a monitoring device to be housed in the machine such that the generator is not required to be purged. The machine, which can be filled with a gas, with a housing, wherein a first chamber is arranged on the housing, wherein a first flap valve is arranged between the housing and the first chamber, creating a fluidic connection between said housing and first chamber, and a second chamber which is arranged on the first chamber, wherein a second flap valve is arranged between the first and the second chambers, creating a fluidic connection between said first chamber and second chamber, wherein a monitoring device for inspection purposes is provided in the housing.Type: ApplicationFiled: June 17, 2013Publication date: July 23, 2015Applicant: Siemens AktiengesellschaftInventors: Waldemar Kowalski, Christoph Lehmann
-
Publication number: 20150200581Abstract: A monitoring system for monitoring an electric machine is provided. A mini-camera for observing the electric machine is arranged inside the electric machine. Moreover, the mini-camera is arranged movably on guide elements, wherein the guide element is designed in such a way that the mini-camera is held in an uncritical parked position during the operation of the electric machine.Type: ApplicationFiled: June 11, 2013Publication date: July 16, 2015Applicant: Siemens AktiengesellschaftInventors: Waldemar Kowalski, Christoph Lehmann
-
Publication number: 20150188373Abstract: A winding for an electric machine is provided. The electric machine includes conductor bars which are arranged one above the other and each of which has a cooling slot. The conductor bars are designed such that the height of the conductor bars increases in the radial direction and the effective cooling cross-section decreases in the radial direction.Type: ApplicationFiled: June 21, 2013Publication date: July 2, 2015Applicant: Siemens AktiengesellschaftInventors: Waldemar Kowalski, Christoph Lehmann
-
Patent number: 8847445Abstract: A rotor for a turbo generator is provided. The rotor includes a cylindrical rotor shaft that expands in the center to form a rotor body, grooves introduced into the cylindrical surface of the rotor body, an excitation winding accommodated in the grooves, a feeding duct through which a cooling gas flows, and cooling ducts which penetrate the excitation winding substantially in the radial direction and connect the feeding duct to respective outlets in the cylindrical surface of the rotor body A distribution duct extending in the longitudinal direction of the shaft is arranged in the area of the central longitudinal axis. The feeding ducts are connected to the distribution duct via junction ducts. An admission duct for feeding the cooling gas is provided for each distribution duct.Type: GrantFiled: February 23, 2010Date of Patent: September 30, 2014Assignee: Siemens AktiengesellschaftInventors: Waldemar Kowalski, Christoph Lehmann
-
Patent number: 8193674Abstract: An arrangement having at least two generator bars for a stator of an electrical generator which are electrically connected to one another via a respective bar end is characterized, according to the invention, by the fact that the respective bar ends, which are electrically connected to one another, of the at least two generator bars are braced with respect to one another by means of a tape.Type: GrantFiled: November 23, 2006Date of Patent: June 5, 2012Assignee: Siemens AktiengesellschaftInventors: Waldemar Kowalski, Christoph Lehmann, Claus-Georg Richter, Karlheinz Spiess
-
Publication number: 20120119603Abstract: A rotor for a turbo generator is provided. The rotor includes a cylindrical rotor shaft that expands in the center to form a rotor body, grooves introduced into the cylindrical surface of the rotor body, an excitation winding accommodated in the grooves, a feeding duct through which a cooling gas flows, and cooling ducts which penetrate the excitation winding substantially in the radial direction and connect the feeding duct to respective outlets in the cylindrical surface of the rotor body A distribution duct extending in the longitudinal direction of the shaft is arranged in the area of the central longitudinal axis. The feeding ducts are connected to the distribution duct via junction ducts. An admission duct for feeding the cooling gas is provided for each distribution duct.Type: ApplicationFiled: February 23, 2010Publication date: May 17, 2012Inventors: Waldemar Kowalski, Christoph Lehmann
-
Patent number: 7795776Abstract: An oscillation damping system for stator windings is provided which includes a supporting component of an end winding. The supporting component is equipped with damping elements, which are arranged asymmetrically in the circumferential direction in order to suppress excited natural oscillations. Masses or springs and screw-type restraints which connect the supporting component to the stator housing are suitable as damping elements.Type: GrantFiled: January 5, 2007Date of Patent: September 14, 2010Assignee: Siemens AktiengesellschaftInventors: Ronald Beck, Ulrich Ehehalt, Waldemar Kowalski, Christoph Lehmann, Christoph Richter, Karlheinz Spiess
-
Publication number: 20090302696Abstract: An oscillation damping system for stator windings is provided which includes a supporting component of an end winding. The supporting component is equipped with damping elements, which are arranged asymmetrically in the circumferential direction in order to suppress excited natural oscillations. Masses or springs and screw-type restraints which connect the supporting component to the stator housing are suitable as damping elements.Type: ApplicationFiled: January 5, 2007Publication date: December 10, 2009Inventors: Ronald Beck, Ulrich Ehehalt, Waldemar Kowalski, Christoph Lehmann, Christoph Richter, Karlheinz Spiess
-
Publication number: 20090295252Abstract: An arrangement having at least two generator bars for a stator of an electrical generator which are electrically connected to one another via a respective bar end is characterized, according to the invention, by the fact that the respective bar ends, which are electrically connected to one another, of the at least two generator bars are braced with respect to one another by means of a tape.Type: ApplicationFiled: November 23, 2006Publication date: December 3, 2009Inventors: Waldemar Kowalski, Christoph Lehmann, Claus-Georg Richter, Karlheinz Spiess