A method for controlling the ambient temperature vaporization of carbon dioxide, including introducing a liquid carbon dioxide stream at a supply pressure into a pressure reduction valve, thereby producing a carbon dioxide stream at a delivery pressure is provided. The method includes introducing the carbon dioxide stream at the delivery pressure into a heat exchange device, thereby exchanging heat between a stream of ambient temperature air and the liquid carbon dioxide stream, thereby producing a vaporized carbon dioxide stream at the delivery pressure, and introducing the vaporized carbon dioxide stream at the delivery pressure into a backpressure regulator, thereby maintaining the vaporized carbon dioxide stream above a minimum delivery pressure.

A method for controlling the ambient temperature vaporization of carbon dioxide, including introducing a liquid carbon dioxide stream at a supply pressure into a pressure reduction valve, thereby producing a carbon dioxide stream at a delivery pressure is provided. The method includes introducing the carbon dioxide stream at the delivery pressure into a heat exchange device, thereby exchanging heat between a stream of ambient temperature air and the liquid carbon dioxide stream, thereby producing a vaporized carbon dioxide stream at the delivery pressure, and introducing the vaporized carbon dioxide stream at the delivery pressure into a backpressure regulator, thereby maintaining the vaporized carbon dioxide stream above a minimum delivery pressure.

A system for relieving pressure from within a generator casing can include a generator shaft defining a shaft channel therein and at least one rotating valve disposed within the shaft channel of the generator shaft and in fluid communication with an interior of the generator casing and the atmosphere. The rotating valve is configured to allow fluid within the generator casing to flow through the generator shaft to the atmosphere in an open state and while rotating. The rotating valve is configured to prevent fluid within the generator casing from flowing in a closed state.

A motor capable of suppressing droplets of water generated due to condensation from adhering to electrical components inside a rotary encoder is provided. A motor includes: a motor main body having a rotating shaft member; and a rotary encoder, wherein the rotary encoder has a cover member, and an inner surface of the cover member has a first top surface formed having an inclined portion that is inclined relative to a horizontal direction so as to guide a droplet of water when the rotating shaft member is disposed to extend in a vertical direction, and/or a second top surface formed having an inclined portion that is inclined relative to a horizontal direction so as to guide a droplet of water when the rotating shaft member is disposed to extend in a horizontal direction.

A motor includes: a rotor core which rotates about an axis; a plurality of magnets which extend in an axial direction of the axis inside the rotor core and are disposed in a circumferential direction; a shaft body which is disposed coaxially with the rotor core and has a hollow portion through which a fluid is able to pass from a first side to a second side in the axial direction; and a plurality of heat radiation portions which are disposed along the magnet in the circumferential direction and have a planar portion disposed to be parallel to a side surface of the magnet facing a radial direction, wherein the heat radiation portion extends to be closer to the second side than a second side core end surface located on the second side in the axial direction of the rotor core.

In a rotary electric machine in which a controller and a heat sink are arranged in an extending direction of an output shaft of a motor, in order to provide a rotary electric machine which secures a heat rejection performance and an insulation performance of a semiconductor device to be mounted to the controller and is downsized as a whole, the controller includes a semiconductor device having a drive circuit provided so as to correspond to a stator winding of the motor, and the semiconductor device has a main face held in close contact with the heat sink. On a close contact face between the semiconductor device and the heat sink, a drive circuit is formed so as to extend along an outer edge portion of the heat sink to increase a cooling area.

An assembly and a method for preventing an axial migration of a spring in a generator rotor are presented. The assembly includes a step pin radially disposed through an amortisseur and inserted into a spring of the generator rotor. The step pin is arranged axially apart from an adjacent radial vent passage and radially extends through the spring into a slot clearance between the spring and a creepage. The amortisseur includes a counter bore to retain a pin head and a pin shoulder. The spring includes a pin hole for a pin body extending therethrough. Diameters of the counter bore and the pin hole are smaller than diameters of amortisseur radial vent aperture and spring radial vent aperture. The step pin prevents an axial migration of the spring in rotor slots.

An electric vehicle comprises a driving power device which drives a wheel and includes a heat generating component which includes a heat generating component and generates heat during an operation thereof; a mechanical pump which is mechanically driven by the driving motor and supplies a coolant in an amount proportional to a rotational speed of the driving motor to the heat generating component; an electric pump which supplies the coolant to the heat generating component; and an electric pump control section which controls an operation of the electric pump; wherein the electric pump control section causes the electric pump to be driven upon determining that a required cooling capability value is larger than a mechanical cooling capability value of the mechanical pump, and stops causing the electric pump to be driven when the required cooling capability value is smaller than the mechanical cooling capability value.

An electric vehicle comprises a driving power device which drives a wheel and includes a heat generating component which includes a heat generating component and generates heat during an operation thereof; a mechanical pump which is mechanically driven by the driving motor and supplies a coolant in an amount proportional to a rotational speed of the driving motor to the heat generating component; an electric pump which supplies the coolant to the heat generating component; and an electric pump control section which controls an operation of the electric pump; wherein the electric pump control section causes the electric pump to be driven upon determining that a required cooling capability value is larger than a mechanical cooling capability value of the mechanical pump, and stops causing the electric pump to be driven when the required cooling capability value is smaller than the mechanical cooling capability value.

An electric motor includes a stator having a tubular shape, a rotor rotatable around a rotary axis and having a rotary spindle, a first housing part disposed so as to partially house the rotary spindle, a second housing part disposed at the other end of the stator in the rotary axis direction, a third housing part at a side opposite to the first housing part in the rotary axis direction with respect to the second housing part, a plurality of ventilation parts formed so as to communicate with at least the stator, the second housing part, and the third housing part, and a plurality of fans for ventilating the plurality of ventilation parts, the plurality of fans being disposed in the third housing part on a plane perpendicular to the rotary axis so as not to overlap the rotary axis.