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公开(公告)号：US20230400515A1
公开(公告)日：2023-12-14
申请号：US18035336
申请日：2021-11-08
发明人： Ashutosh PATEL , Chunyan LAI , Narayan Chandra KAR , Gerd SCHLAGER , Martin WINTER , Alexander EXL , Lakshmi Varaha IYER
IPC分类号： G01R31/34
CPC分类号： G01R31/346 , G01R31/343
摘要： A method and system for characterizing a state of health of a winding of an electric machine are provided. The winding may include one or more stator windings in an electric machine, for example, a permanent magnet synchronous machine (PMSM). The method comprises: applying a voltage pulse to the winding; measuring a phase current signal of a current supplied to the winding; determining a high-frequency transient current based on the phase current signal. The state of health of the winding may be calculated as a function of change in frequency spectrum of the high-frequency transient current. The method may include calculating a plurality of packets using a wavelet packet decomposition of the high-frequency transient current; and determining one or both of: the state of health or a classification of degradation, using an indicator based upon at least one packet of the plurality of packets.
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2.发明申请公开(公告)号：US20220348050A1
公开(公告)日：2022-11-03
申请号：US17271741
申请日：2019-08-29
摘要： A system for transferring waste heat from a range extender module of an electric vehicle to a cabin module includes a cooling circuit in the range extender module and a heating circuit of the cabin module. The cooling circuit is thermally coupled to the heating circuit. The cooling circuit includes a thermal coupler and the heating circuit includes a corresponding thermal coupler. The thermal coupler of the cabin module heating circuit may be disposed at the rear of the cabin module, and the thermal coupler for the cooling circuit of the range extender module may be disposed at the front of the range extender module. The thermal coupler of the range extender module may be longitudinally adjustable.
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公开(公告)号：US20220007551A1
公开(公告)日：2022-01-06
申请号：US17293494
申请日：2019-11-13
申请人： Vimaldoss JESUDHAS , Ram BALACHANDAR , Ron BARRON , Narayan KAR , Martin WINTER , Gerd SCHLAGER , Lakshmi Varaha IYER , MAGNA INTERNATIONAL INC.
发明人： Vimaldoss JESUDHAS , Ram BALACHANDAR , Ron BARRON , Narayan KAR , Martin WINTER , Gerd SCHLAGER , Lakshmi Varaha IYER
摘要： A coldplate for removing heat from one or more heat sources, such as power electronics devices, includes a baseplate including a first surface in thermally-conductive communication with the heat sources. The baseplate includes a second surface opposite the first surface to transfer heat into a cooling fluid in contact therewith. The second surface includes a peripheral flange surrounding a central region having a plurality of parallel ribs, which increase the surface area to improve heat transfer from the baseplate and into the fluid. A housing abuts the peripheral flange of the baseplate to define a cooling passage for circulation of the cooling fluid. A jet-array plate subdivides the cooling passage into a supply header and a main channel and defines a plurality of orifices to convey the fluid into the main channel and to direct the fluid toward predetermined zones on the baseplate.
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公开(公告)号：US20210194242A1
公开(公告)日：2021-06-24
申请号：US17271876
申请日：2019-08-30
发明人： Andreas EGLSEER , Martin WINTER
摘要： A system for pre-charging and discharging a hazardous voltage direct current system includes a first relay in the form of main contactors, a second relay, and a resistor disposed between first and second electrical contacts. In an initial state, the main contactors are open, and the second relay connects the resistor to the second contacts to operate as a passive discharge. In a startup state, the second relay is switched and pre-charging occurs with the resistor. In an operating state, the main contactors are closed and current flows between the first and second contacts without the resistor. In a shutdown state, the main contactors are opened and the second relay is switched to connect the resistor to the second contacts, and voltage from the second contacts is discharged thermally at the resistor.
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5.发明申请公开(公告)号：US20230095515A1
公开(公告)日：2023-03-30
申请号：US17795562
申请日：2021-01-29
IPC分类号： H03K17/687 , H02P29/028 , H02M7/537 , H02P3/22
摘要： A switching circuit of a motor drive includes a high-side switch configured to selectively conduct current between a DC positive conductor and an output conductor, and a low-side switch configured to selectively conduct current between the output conductor and a DC negative conductor. The high-side switch comprises a depletion mode (D-Mode) gallium nitride (GaN) high-electron-mobility transistor (HEMT) and a Si-FET in a cascaded configuration, and the low-side switch comprises a D-Mode GaN HEMT. This arrangement can provide a safe state operation in which the switching circuit provides a default condition providing electrical continuity between the DC negative conductor and the output conductor and providing electrical isolation between the DC positive conductor and the output conductor in the event of a loss of control signals.
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公开(公告)号：US20210384788A1
公开(公告)日：2021-12-09
申请号：US17287257
申请日：2019-10-22
发明人： Martin WINTER , Gerd SCHLAGER
摘要： A stator for an electromagnetic machine includes a plurality of bus bars of copper, each extending parallel to one another between a first end and a second end. A first circuit board abuts the first end of the bus bars and includes a first substrate and a first electrically conductive layer disposed thereupon with a plurality of first contact terminals in physical and electrical communication with each of the bus bars. A similar second circuit board abuts the second end of each of the bus bars and includes a second substrate and second contact terminals in physical and electrical communication with each of the bus bars. The substrates of the circuit boards are electrical insulators and are good conductors of heat. A heat sink abuts each of the substrates of the circuit boards for removing heat from the circuit boards and from the bus bars.
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公开(公告)号：US20210336378A1
公开(公告)日：2021-10-28
申请号：US17274204
申请日：2019-09-11
发明人： Gregor SCHNOELL , Martin WINTER
IPC分类号： H01R13/52
摘要： A system for making an autonomous connection between a first electrical contact and a second electrical contact includes a first receiver with the first contact therein and a second receiver with a second contact therein. The receivers are at least partially disposed within respective first and second housings. A first cover is disposed over an opening of the first housing and a second cover is disposed over an opening of the second housing. The covers seal the ends of the housings and the ends of the receivers, providing a double seal to the contacts. As the receivers are moved toward each other, the covers are automatically moved out of engagement with the receivers and housing. As the receivers are moved away from each other, the covers are automatically moved back into engagement with the housings and receivers.
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