Patents by Inventor Carsten Probol
Carsten Probol 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: 9605710Abstract: A method for early detection of developing damage in a bearing caused by flow of a bearing current includes evaluating a long-term measurement of a measured variable representative of a bearing current amplitude of a bearing current during a bearing operation, representing—based on the evaluation—measurement results in form of a histogram which displays a number of bearing currents per time interval in each interval of the bearing current amplitude, and evaluating the histogram representation of the measurement results through pattern comparison. A device for carrying out the method is also disclosed.Type: GrantFiled: March 1, 2010Date of Patent: March 28, 2017Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Jörg Hassel, Carsten Probol, Hans Tischmacher
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Patent number: 9417156Abstract: A method and device for assessing damage to a rolling bearing caused by bearing currents, in particular high-frequency bearing currents, in an electric machine which is electrically connected to an inverter, in particular to an inverter having a DC voltage link circuit, is described. The rolling bearing has a lubrication gap between an inner bearing ring and a rolling body and between an outer bearing ring and the rolling body. The method includes detecting the energy of an electric discharge event in the lubrication gaps, searching for a coincident event having a frequency above one GHz indicative of a damaging bearing current event, detecting a frequency of occurrence of discharge events, and evaluating the discharge events by correlating the frequency of occurrence and the energy of the discharge events.Type: GrantFiled: February 3, 2011Date of Patent: August 16, 2016Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Sven Gattermann, Ralf Kowalewski, Carsten Probol, Arno Steckenborn, Oliver Theile, Hans Tischmacher
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Patent number: 9046579Abstract: Electric arc discharges between bearing rings in a roller bearing are analyzed by setting a defined operating state based on rotational speed of the roller bearing, temperature of the roller bearing, an imbalance of the roller bearing causing vibrations, lubricants, axial/radial/tilt loads, tilting of the bearing rings relative to each other, pulse shape and pulse repetition rate of an applied electrical voltage, bearing play, and pre-existing damage to the roller bearing. A pulse-shaped electrical voltage between inner and outer bearing ring generates electric arc discharges, wherein for each electric arc discharge a characteristic value representative of energy, power, voltage and/or current and duration of the electric arc discharge is determined. Only those electric arc discharges are evaluated that have a qualifying value determined in accordance with at least one of the characteristic values greater than a predefined limit value.Type: GrantFiled: February 2, 2011Date of Patent: June 2, 2015Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Sven Gattermann, Ralf Kowalewski, Carsten Probol, Hans Tischmacher
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Patent number: 9035664Abstract: A measuring method and a device that permit a better evaluation of bearing currents are disclosed. The method uses non-contact measurement of a bearing voltage. A non-contact voltage measurement is performed by means of a series circuit of capacitors. The bearing voltage can be detected especially well in this manner even in the high frequency range.Type: GrantFiled: May 11, 2010Date of Patent: May 19, 2015Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Jörg Hassel, Gerd Michaelis, Carsten Probol
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Patent number: 9003976Abstract: An electric machine has a base body in which a stator of the electric machine is arranged. The electric machine has a rotor shaft which is mounted in the base body in bearings for rotation. The electric machine has a pick-up element connected in fixed rotative engagement with the base body and which taps a voltage present on the rotor shaft. The pick-up element is electrically connected to the base body via a capacitor and/or an ohmic resistor. A capacitance value of the capacitor is at least 1 nF. A resistance value of the ohmic resistor is between 10 mO and 10 O.Type: GrantFiled: December 12, 2011Date of Patent: April 14, 2015Assignee: Siemens AktiengesellschaftInventors: Michael Brauer, Carsten Probol
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Patent number: 8786450Abstract: The invention relates to a method for identifying dirt and/or dew on components of a voltage intermediate circuit converter. According to the invention, the temporal curve of a partial discharge pulsed current is detected at least during a precharging process of an intermediate circuit capacitor of the voltage intermediate circuit converter comprising at least one capacitor, wherein a frequency spectrum is calculated from said current pulse, and wherein depending of the result, a dirt warning and/or a dew warning is activated. Thus, the degree of dirt and/or dew of said voltage intermediate circuit converter can be determined at least during a charging process of an intermediate circuit capacitor of a voltage intermediate circuit converter, thereby preventing a breakdown including the consequences thereof.Type: GrantFiled: January 29, 2010Date of Patent: July 22, 2014Assignee: Siemens AktiengesellschaftInventors: Christian Dietrich, Werner Fischer, Jörg Hassel, Marc Hiller, Carsten Probol, Rainer Sommer
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Publication number: 20130270822Abstract: An electric machine has a base body in which a stator of the electric machine is arranged. The electric machine has a rotor shaft which is mounted in the base body in bearings for rotation. The electric machine has a pick-up element connected in fixed rotative engagement with the base body and which taps a voltage present on the rotor shaft. The pick-up element is electrically connected to the base body via a capacitor and/or an ohmic resistor. A capacitance value of the capacitor is at least 1 nF. A resistance value of the ohmic resistor is between 10 mO and 10 O.Type: ApplicationFiled: December 12, 2011Publication date: October 17, 2013Applicant: Siemens AktiengesellschaftInventors: Michael Brauer, Carsten Probol
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Publication number: 20130066566Abstract: A method for early detection of developing damage in a bearing caused by flow of a bearing current includes evaluating a long-term measurement of a measured variable representative of a bearing current amplitude of a bearing current during a bearing operation, representing—based on the evaluation—measurement results in form of a histogram which displays a number of bearing currents per time interval in each interval of the bearing current amplitude, and evaluating the histogram representation of the measurement results through pattern comparison. A device for carrying out the method is also disclosed.Type: ApplicationFiled: March 1, 2010Publication date: March 14, 2013Applicant: Siemens AktiengesellschaftInventors: Jörg Hassel, Carsten Probol, Hans Tischmacher
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Publication number: 20130049772Abstract: A measuring method and a device that permit a better evaluation of bearing currents are disclosed. The method uses non-contact measurement of a bearing voltage. A non-contact voltage measurement is performed by means of a series circuit of capacitors. The bearing voltage can be detected especially well in this manner even in the high frequency range.Type: ApplicationFiled: May 11, 2010Publication date: February 28, 2013Applicant: Siemens AktiengesellschaftInventors: Jörg Hassel, Gerd Michaelis, Carsten Probol
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Publication number: 20120330580Abstract: In a system for ascertaining a bearing state and in a method for ascertaining a bearing state of a bearing of an electric machine, measurement value (21) is ascertained by means of a sensor unit (20). The measurement value is transmitted to a simulation unit (22), wherein a result value (23) is ascertained by means of the simulation unit (22), wherein the result value is in particular a bearing-current value or a value that is dependent on the bearing current. The result value (23) can be transmitted to a further unit (24).Type: ApplicationFiled: February 3, 2011Publication date: December 27, 2012Applicant: SIEMENS AKTIENGESELLSCHAFTInventors: Thomas Fruh, Jörg Hassel, Carsten Probol, Hans Tischmacher
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Publication number: 20120323372Abstract: Electric arc discharges between bearing rings in a roller bearing are analyzed by setting a defined operating state based on rotational speed of the roller bearing, temperature of the roller bearing, an imbalance of the roller bearing causing vibrations, lubricants, axial/radial/tilt loads, tilting of the bearing rings relative to each other, pulse shape and pulse repetition rate of an applied electrical voltage, bearing play, and pre-existing damage to the roller bearing. A pulse-shaped electrical voltage between inner and outer bearing ring generates electric arc discharges, wherein for each electric arc discharge a characteristic value representative of energy, power, voltage and/or current and duration of the electric arc discharge is determined. Only those electric arc discharges are evaluated that have a qualifying value determined in accordance with at least one of the characteristic values greater than a predefined limit value.Type: ApplicationFiled: February 2, 2011Publication date: December 20, 2012Applicant: Siemens AktiengesellschaftInventors: Sven Gattermann, Ralf Kowalewski, Carsten Probol, Hans Tischmacher
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Publication number: 20120319723Abstract: The grounding quality of an electric machine should be better monitored. Therefore, an electric machine is proposed, comprising a stator (1), a rotor (2), a shaft (3), to which the rotor (2) is fastened, and a grounding device (5) for grounding the shaft. The electric machine also has a measuring device (6) for measuring a ground current of the grounding device (5) and for providing a corresponding measured value. The electric machine also has a monitoring device (7) for monitoring the grounding function of the grounding device (5) on the basis of the measured value. In this way, the state of a grounding brush in regard to soiling and wear, for example, can be continuously monitored.Type: ApplicationFiled: March 1, 2010Publication date: December 20, 2012Applicant: Siemens AktiengesellschaftInventors: Jörg Hassel, Carsten Probol, Arno Steckenborn, Oliver Theile, Hans Tischmacher
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Publication number: 20120319636Abstract: A method and device for assessing damage to a rolling bearing caused by bearing currents, in particular high-frequency bearing currents, in an electric machine which is electrically connected to an inverter, in particular to an inverter having a DC voltage link circuit, is described. The rolling bearing has a lubrication gap between an inner bearing ring and a rolling body and between an outer bearing ring and the rolling body. The method includes detecting the energy of an electric discharge event in the lubrication gaps, searching for a coincident event having a frequency above one GHz indicative of a damaging bearing current event, detecting a frequency of occurrence of discharge events, and evaluating the discharge events by correlating the frequency of occurrence and the energy of the discharge events.Type: ApplicationFiled: February 3, 2011Publication date: December 20, 2012Applicant: Siemens AktiengesellschaftInventors: Sven Gattermann, Ralf Kowalewski, Carsten Probol, Arno Steckenborn, Oliver Theile, Hans Tischmacher
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Publication number: 20120105235Abstract: The invention relates to a method for identifying dirt and/or dew on components of a voltage intermediate circuit converter. According to the invention, the temporal curve of a partial discharge pulsed current is detected at least during a precharging process of an intermediate circuit capacitor of the voltage intermediate circuit converter comprising at least one capacitor, wherein a frequency spectrum is calculated from said current pulse, and wherein depending of the result, a dirt warning and/or a dew warning is activated. Thus, the degree of dirt and/or dew of said voltage intermediate circuit converter can be determined at least during a charging process of an intermediate circuit capacitor of a voltage intermediate circuit converter, thereby preventing a breakdown including the consequences thereof.Type: ApplicationFiled: January 29, 2010Publication date: May 3, 2012Applicant: Siemens AktiengesellschaftInventors: Christian Dietrich, Werner Fischer, Jörg Hassel, Marc Hiller, Carsten Probol, Rainer Sommer