In an electrical machine for the hybrid drive of a vehicle, an annular cooling jacket extends between a housing and a casing. The cooling jacket is connected to a coolant inlet and a coolant outlet so that coolant is axially introduced into the cooling jacket. The coolant inlet and the coolant outlet are situated next to each other in the circumferential direction of the housing and are hydraulically connected to a deflection section by way of coolant ducts. Coolant introduced into the cooling jacket flows in two partial flows in opposite directions, to the deflection section through coolant ducts forming an intake. The coolant is deflected back to the coolant outlet through a coolant duct forming a return. The coolant flows through the coolant duct of the return and the axially adjacent coolant duct of the intake in opposite directions.

Obtain a rotary electric machine by which a share of coil slots for a stator winding in slots, which are formed in a stator core, can be increased, and heat generation at a central portion of a stator can be decreased. The stator winding is composed of coil slots, which are inserted to the slots, and coil ends extended toward the outside in the axis direction of the stator core; and the coil conductors of the coil slots are configured in such a way that cross-sectional areas at central portions in the axis direction are wider cross-sectional areas at both end portions, and the cross-sectional areas of the coil conductors are reduced along the coil slots from the central portions to the both end portions.

There is provided a dynamo-electric machine that can provide excellent insulating properties by downsizing coil ends. A dynamo-electric machine includes a stator and a rotator. The stator has a stator iron core formed with a plurality of slots arranged in a circumferential direction, and a stator coil inserted into the slots of the stator iron core. The rotator is rotatably disposed on the stator iron core with a predetermined gap. The stator coil is provided with an insulating film. The stator coil includes a main coil and a lead wire with an alternating current terminal. The main coil has a plurality of segment coils connected to one another. The segment coil is a conductor in a rectangular cross section formed in advance in a nearly U-shape. The lead wire is led from the slot. The tip end of the segment coil is formed in a trapezoid cross section.

A solid-state electromagnetic rotor, including a plurality of salient pole pieces arranged around a supporting structure, wherein a first end of each salient pole piece is attached to the support structure and a second end of each salient pole piece points outward away from the supporting structure. The wires wound around each salient pole piece, wherein when the wires of the plurality of salient pole pieces are sequentially excited by an excitation circuit. The salient pole pieces are energized to provide a moving polar magnetic field in the form of distinct magnetic poles as desired to accomplish power generation.

The disclosure relates to winding arrangements for electrical machine stators. Example embodiments include a coil for a tooth element of an electrical machine stator, the coil formed from a plurality of hairpin wires having pairs of legs passing through first and second slots on opposing radial faces of the tooth element, the coil having n full turns passing around the tooth element, the first and second slots each having 2n+2 slot positions having a depth d′ for accommodating a single hairpin wire, the slots each having a first slot position at a first common end and a 2n+2.sup.th slot position at a second opposing end, the coil having first and second terminal connections connected to hairpin wires extending through the first and second slots at respective first and second slot positions.

An electric winding exchanger system for a multi-phase electric motor with multiple isolated neutrals and multiple coil paths increases torque or speed performance of multi-phase electric motors and electric drive modules. The system includes an electronic control unit, a back electromotive force (EMF) boosting circuit, a plurality of high-voltage terminals, an electric motor, and a motor control unit. The electronic control unit receives and processes commands from the motor control unit. The back EMF boosting circuit adjusts the winding arrangements of the electric motor in order to change the state of the electric motor. The plurality of high-voltage terminals transfers high voltage electrical energy from the back EMF boosting circuit to the electric motor and vice versa. The motor control unit allows a user to input commands in order to activate increased torque or speed performance for the electric motor. The electric motor is preferably a multi-phase electric motor of an electric or hybrid vehicle.

An electric winding exchanger system for a multi-phase electric motor with multiple isolated neutrals and multiple coil paths increases torque or speed performance of multi-phase electric motors and electric drive modules. The system includes an electronic control unit, a back electromotive force (EMF) boosting circuit, a plurality of high-voltage terminals, an electric motor, and a motor control unit. The electronic control unit receives and processes commands from the motor control unit. The back EMF boosting circuit adjusts the winding arrangements of the electric motor in order to change the state of the electric motor. The plurality of high-voltage terminals transfers high voltage electrical energy from the back EMF boosting circuit to the electric motor and vice versa. The motor control unit allows a user to input commands in order to activate increased torque or speed performance for the electric motor. The electric motor is preferably a multi-phase electric motor of an electric or hybrid vehicle.

In a coil module, a coil device includes a coil unit and at least one terminal extending from the coil unit. A case is configured to house the coil device. At least one busbar is secured to the case. The at least one terminal is electrically connected to the at least one busbar. A potting member is filled in the case to fixedly retain the coil device in the case.

A solid-state electromagnetic rotor, comprising a plurality of salient pole pieces arranged around a supporting structure, wherein a first end of each salient pole piece is attached to the support structure and a second end of each salient pole piece points outward away from the supporting structure; and wires wound around each salient pole piece, wherein when the wires of the plurality of salient pole pieces are sequentially excited by an excitation circuit, the salient pole pieces are energized to provide a moving polar magnetic field in the form of distinct magnetic poles as desired to accomplish power generation.

An electric coil device includes a winding support which is made of an elongated hollow tube that has the shape of a ring such that a higher-order loop of the winding device is formed entirely by the annular shape of the winding support, and a winding which is made of a superconductive conductor and is attached to the winding support. The superconductive conductor is wound in a helical manner about the hollow tube in a plurality of individual windings such that at least one higher-order winding of the entire helix is produced by the annular shape of the winding support. The interior of the hollow tube is designed as a coolant channel for circulating a fluid coolant. A rotor for an electric machine includes at least one such coil device.