A control device is provided which controls an electric drive system, which has a motor that rotates a rotor blade and an inverter circuit that has a switching element and controls the motor and which rt is installed in a flying body, The control device includes an abnormality occurrence detection unit that detects occurrence of a predetermined abnormality accompanied with an abnormality of temperature of the switching element, and a switching element control unit that controls, when the occurrence of the predetermined abnormality is detected, the switching element so as to reduce loss in the switching element.

A control device is provided which controls an electric drive system, which has a motor that rotates a rotor blade and an inverter circuit that has a switching element and controls the motor and which rt is installed in a flying body, The control device includes an abnormality occurrence detection unit that detects occurrence of a predetermined abnormality accompanied with an abnormality of temperature of the switching element, and a switching element control unit that controls, when the occurrence of the predetermined abnormality is detected, the switching element so as to reduce loss in the switching element.

A stator assembly, an electrical motor having the stator assembly, a wind power generator set and a method for cooling a stator assembly are provided. The stator assembly includes a stator support and a stator core mounted on the stator support, wherein the stator support includes a support enclosure plate, a first axial air flow channel is fonned between the support enclosure plate of the stator support and a radial side surface of the stator core, and the first axial air flow channel is used for receiving a first cold air flow, so that the cold air flow can flow in the axial direction. The stator assembly can introduce a cold air flow from the other side, opposite an air gap, of a stator during the operation of an electrical motor, so that two radial sides of the stator can be cooled at the same time.

A stator assembly, an electrical motor having the stator assembly, a wind power generator set and a method for cooling a stator assembly are provided. The stator assembly includes a stator support and a stator core mounted on the stator support, wherein the stator support includes a support enclosure plate, a first axial air flow channel is fonned between the support enclosure plate of the stator support and a radial side surface of the stator core, and the first axial air flow channel is used for receiving a first cold air flow, so that the cold air flow can flow in the axial direction. The stator assembly can introduce a cold air flow from the other side, opposite an air gap, of a stator during the operation of an electrical motor, so that two radial sides of the stator can be cooled at the same time.

The present disclosure relates to electrical machines, cooling systems and methods for cooling active elements of electrical machines. More in particular, the present disclosure relates to cooling systems and methods for cooling active rotor and/or stator elements of a generator of a wind turbine, e.g. of a direct drive wind turbine. A cooling method comprises supplying a cooling fluid to an air gap through one or more primary inlets of an electrical machine for cooling a plurality of active elements of a rotor of the electrical machine and/or a plurality of active elements of a stator of the electrical machine separated by the air gap. The method further comprises reversing a direction of flow of the cooling fluid such that the cooling fluid is extracted from the electrical machine through one or more primary inlets.

A stator assembly for rotary electrical machine including a stator provided with windings. A sealing and cooling element is overmolded onto the stator.

A stator assembly for rotary electrical machine including a stator provided with windings. A sealing and cooling element is overmolded onto the stator.

An electric compressor includes a compression portion, an electric motor, a drive circuit that has a circuit board on which electronic components are mounted, a housing, and a resin member. At least one of the electronic components is held by the resin member with the resin member sandwiched between the at least one of the electronic component and the circuit board. The electronic compressor includes a first metal member that is in contact with the at least one of the electronic components, and thermally connected to the housing, a second metal member that is disposed in the resin member, and a bolt by which the first metal member and the second metal member are fastened with each other.

The invention relates to an electric motor with an air-gap sleeve. The invention makes it possible for the first time to achieve improved heat dispersal from the rotor by means of an excess pressure in the inner region of the rotor of an air-gap sleeve electric motor. The excess pressure allows the wall thickness of the air-gap sleeve to be reduced by over 50%, as a result of which the heat transfer is improved and a gas with a high thermal capacity can be used.

The invention relates to an electric motor with an air-gap sleeve. The invention makes it possible for the first time to achieve improved heat dispersal from the rotor by means of an excess pressure in the inner region of the rotor of an air-gap sleeve electric motor. The excess pressure allows the wall thickness of the air-gap sleeve to be reduced by over 50%, as a result of which the heat transfer is improved and a gas with a high thermal capacity can be used.