Dr. Ing. H.c. F. Porsche Aktiengesellschaft

Sebastian Wachter

Patrick Fuchs

Maximilian Barkow

Timijan Velic

Daniel Knoblauch

Maurice Kleindienst

Joachim Kappich

Falk Heilfort

Henrik Schrage

Ulrich Weingart

A pulse inverter includes a plurality of power modules, at least one capacitor assembly with a plurality of capacitors, at least one power module cooling channel configured to be perfused by a cooling fluid in order to cool the power modules, and at least one capacitor cooling channel configured to be perfused by a cooling fluid in order to cool the capacitors. The pulse inverter also includes a plurality of connection channels extending between the at least one power module cooling channel and the at least one capacitor cooling channel, the connection channels being configured to be perfused by the cooling fluid.

Pulse inverter and method for cooling a pulse inverter

A pulse inverter for operating an electric machine of a motor vehicle includes a power module for converting DC current provided by a motor vehicle battery into AC current. The pulse inverter includes a cooling device for cooling components of the pulse inverter by an electrically insulating cooling fluid flowing through the cooling device, wherein the cooling device includes a fluid-tight housing. Cooling fluid flowing through the fluid-tight housing is in direct contact with at least one of the components of the pulse inverter to be cooled. The cooling device includes a cooling channel. The power module is thermally connected to an outer surface of the cooling channel, wherein the cooling channel includes an output. The output opens into the fluid-tight housing, so that the cooling fluid flowing through the cooling device first flows through the cooling channel and subsequently the fluid-tight housing.

Pulse inverter having a cooling device as well as motor vehicle having a pulse inverter

A drive system for an electric vehicle includes: drive components, including: a traction battery; an inverter; and an electric machine. The traction battery is electrically connected to the electric machine by the inverter. The traction battery is electrically connected to the inverter and the inverter is electrically connected to the electric machine in each case by high-voltage connecting elements. The drive system has a cooling circuit cools the drive components by a cooling medium. The drive components and the high-voltage connecting elements are each formed so as to convey cooling medium and form a part of the cooling circuit.

Drive system for an electric vehicle and electric vehicle

An electric machine including a pulse inverter having a region with an oil space and busbars, wherein the electric machine is electrically connected to the pulse inverter by the busbars such that the busbars are electrically connected to a connection of the pulse inverter, wherein the busbars and the electric machine are cooled by oil, and wherein the oil for supplying and cooling the busbars is stored within the oil space in the region of the pulse inverter.

Electric machine

An electrical apparatus, including a first housing having a fluid-filled or fluid-perfused wet space and a dry space that are separated from one another by a wall, wherein the wall includes an opening, one or more power-conducting and/or power-switching elements arranged in the wet space, and a control electronics for the one or more power-switching elements arranged in the dry space. The electrical apparatus includes a second housing extending from the opening into the wet space, wherein the second housing reaches up to or encloses a power-conducting element, and a sensor arranged in the second housing, the sensor being configured to measure a variable that depends on an electrical power flowing through the power-conducting element. The second housing seals the opening in the wall in a fluid-tight manner. Measured values or signals of the sensor conducted by lines are passed through the opening into the dry space.

Electrical apparatus having one or more sensors on power-conducting and/or power-switching elements around which a fluid flows

An apparatus for measuring a flow of current through at least one electrical conductor of an electrotechnical device which is disposed in a cooling channel, wherein a non-conductive cooling medium flows through the cooling channel during operation of the electrotechnical apparatus, the apparatus including a flux conductor which is disposed around the at least one electrical conductor, and an evaluation circuit which is coupled to the flux conductor and is configured to determine the flow of current through the at least one electrical conductor by evaluating an electrical parameter of the flux conductor, wherein at least a part of the flux conductor is disposed in the cooling channel.

Apparatus and method for measuring a flow of current in a directly cooled conductor

An inverter () for operating an electrical machine () has at least one power semiconductor () and a drain contact () arranged on an underside of the power semiconductor (). The drain contact () is arranged in a coolant channel () for impingement by a coolant. Also proposed are a drivetrain () and a motor vehicle ().

Power electronics for an electrical machine, drivetrain, motor vehicle

A measurement arrangement, including a current line, a first measurement location provided on the current line, a second measurement location provided on the current line, and a coolant, wherein the second measurement location is provided at a distance from the first measurement location in order to make it possible to measure a voltage in a measurement section of the current line arising due to a current flowing through the current line, wherein the measurement section is defined between the first measurement location and the second measurement location, and wherein the coolant is of fluid form and at least in areas is in direct contact with the current line in an area between the first measurement location and the second measurement location.

Measurement arrangement

An electric machine, in particular for an electric vehicle. The machine includes a rotor which can be rotated with respect to a stator and has at least one rotor shaft. The machine includes a duct system for cooling the machine, through which duct system a coolant can flow. The duct system runs at least in sections within the rotor shaft. Here, the duct system includes a cooling duct. The cooling duct is configured so as to run conically at least in sections in the longitudinal direction of the rotor shaft, such that the coolant can be conveyed in the direction of an increasing duct diameter by way of a rotational movement of the rotor shaft.

Electric machine having a rotor shaft with a duct system for cooling

A drive arrangement for auxiliary units in a motor vehicle has a control unit and an electric drive unit that is connected via a transmission arrangement to at least one auxiliary unit. An electric drive unit () is connected in terms of drive to at least two auxiliary units () by drive trains () of a transmission arrangement (). Clutch members () for coupling or decoupling the auxiliary units () in terms of drive are provided in the respective drive trains ().

Drive arrangement for auxiliary units in the motor vehicle sector

A drive module for a vehicle has a transmission () and an electric machine () that is coupled to an input shaft () of the transmission (). An air-filled cavity () is formed between the electric machine () and the transmission (). The electric machine () is an external-rotor motor with a rotor () that surrounds the stator (). A fan impeller () rotates with the rotor () and draws air out of the air-filled cavity () in an axial direction, draws the air through windings () of the stator () for cooling, and subsequently conveys the air in the radial direction into a housing-side flow duct () in which heated air can be accumulated and via which the air can be returned toward the cavity (). The heated air can be cooled in the region of the flow duct () and/or in the region of the cavity ().

Drive module for a vehicle

A drive train for a hybrid motor vehicle has an internal combustion engine () with a motor shaft () for providing a torque for driving the hybrid motor vehicle, and an electric machine () for providing a torque for driving the hybrid motor vehicle. The motor shaft () can be coupled via a transmission clutch () to a motor vehicle transmission () to shift transmission gears (to), and the motor vehicle transmission () has a transmission output shaft (). A ring gear of a differential gear mechanism () of the hybrid motor vehicle can be driven by the transmission output shaft (). The electric machine () can be coupled by a clutch (K) to a drive shaft () and the ring gear () can be driven by the drive shaft ().

Growing community of inventors

Pressig, Germany

Sebastian Wachter