An electrical apparatus includes a housing, a blower, and a duct. The housing covers a plurality of electrical components. The blower blows air. The duct guides the air that has cooled one of the plurality of electrical components to another one of the plurality of electrical components. The duct includes a fire wall.

An electrical apparatus includes a housing, a blower, and a duct. The housing covers a plurality of electrical components. The blower blows air. The duct guides the air that has cooled one of the plurality of electrical components to another one of the plurality of electrical components. The duct includes a fire wall.

A fluid apparatus includes a hydraulic machine, a rotary electric machine connected to the hydraulic machine, and a power conversion controller that converts power from the rotary electric machine. A non-normal operation is performed in a warning state that differs from a normal state in which a normal operation is continued and an anomalous state in which operation is stopped to continue a stopped condition.

A fluid apparatus includes a hydraulic machine, a rotary electric machine connected to the hydraulic machine, and a power conversion controller that converts power from the rotary electric machine. A non-normal operation is performed in a warning state that differs from a normal state in which a normal operation is continued and an anomalous state in which operation is stopped to continue a stopped condition.

An electric machine (1), comprising: a housing (2), in which a stator (3) and a rotor (4), which is rotatable relative to the stator (3), are accommodated, a cooling device with a cooling channel (5) through which a coolant can flow and which extends from an inlet (7), through the housing (2) and through the rotor (4), to an outlet (6), and a sealing device (18) for sealing off the rotor (4) with respect to an interior space (19) of the housing, wherein the sealing device (18) has a radial shaft sealing ring (11) which surrounds the rotor (4) and which delimits a reservoir (12) for coolant leakage. Additionally described are a drivetrain for a vehicle (14) having such an electric machine (1), and a method for operating the electric machine (1).

An oil temperature control method is applied to a controller of an electric vehicle that includes an oil cooling circuit, where the oil cooling circuit flows through a motor and an inverter. The method includes the following steps: determining an oil temperature at a detection point, where the detection point is a specified location in the oil cooling circuit; when the oil temperature is lower than a first target temperature, triggering one or more of the following operations: bypassing an oil-water heat exchanger, reducing a water flow rate, and increasing a power of an oil pump; or when the oil temperature is higher than a second target temperature, triggering one or more of the following operations: disabling a bypass path of an oil-water heat exchanger, increasing a water flow rate, and reducing a power of an oil pump.

A method for dynamically monitoring temperature of a fluid at a heat generating device includes monitoring, using a temperature sensor, temperature of the fluid held in a fluidic sump. A first fluidic flow rate and a second fluidic flow rate are determined. A third fluidic flow rate and a temperature drop of the fluid across the heat exchanger in the active coolant circuit are determined based upon the temperature of the fluid and the third fluidic flow rate through the active coolant circuit. A fluid temperature supplied to the electric machine through the active coolant circuit is determined based upon the third fluidic flow rate and the temperature drop of the fluid across the heat exchanger. An effective temperature of the fluid is determined based upon the temperature of the fluid in the sump and the temperature of the fluid supplied to the electric machine through the active coolant circuit.

A method for dynamically monitoring temperature of a fluid at a heat generating device includes monitoring, using a temperature sensor, temperature of the fluid held in a fluidic sump. A first fluidic flow rate and a second fluidic flow rate are determined. A third fluidic flow rate and a temperature drop of the fluid across the heat exchanger in the active coolant circuit are determined based upon the temperature of the fluid and the third fluidic flow rate through the active coolant circuit. A fluid temperature supplied to the electric machine through the active coolant circuit is determined based upon the third fluidic flow rate and the temperature drop of the fluid across the heat exchanger. An effective temperature of the fluid is determined based upon the temperature of the fluid in the sump and the temperature of the fluid supplied to the electric machine through the active coolant circuit.

Provided is a motor capable of more reliably preventing dust generated therein from flowing to the outside. A motor includes a stator, a rotor, a rotor housing which rotates along with the rotor, a stator housing which fixes the stator thereto, includes spaces formed with respect to the rotor housing, and overlaps the rotor housing with first gaps interposed therebetween in the entire circumferential direction, annular members which overlap the stator housing with second gaps interposed therebetween in the entire circumferential direction inside the spaces, exhaust holes which suck and discharge air inside the spaces through the second gaps, and exhaust grooves.

Provided is a motor capable of more reliably preventing dust generated therein from flowing to the outside. A motor includes a stator, a rotor, a rotor housing which rotates along with the rotor, a stator housing which fixes the stator thereto, includes spaces formed with respect to the rotor housing, and overlaps the rotor housing with first gaps interposed therebetween in the entire circumferential direction, annular members which overlap the stator housing with second gaps interposed therebetween in the entire circumferential direction inside the spaces, exhaust holes which suck and discharge air inside the spaces through the second gaps, and exhaust grooves.