A liquid-cooled motor may include a removable liquid cooling jacket. The jacket may enclose a commercial off-the-shelf electric motor. The jacket may be ribbed and may include multiple fluid channels, allowing fluid to circulate over the surface of the electric motor and limiting eddy currents. A front-most portion of the liquid-cooled motor may include electrical and fluid interfaces, including an inlet and an outlet for tubing to carry fluids. Removable gaskets or O-rings may be placed between the front-most portion and the jacket, and between a rear-most portion and the jacket. The jacket may be connected to the front-most portion and the rear-most portion using removable screws. The liquid-cooled motor may be disassembled for maintenance and then re-assembled. The jacket, front-most portion, and rear-most portion may be 3D printed from a watertight acrylic polymer, or machined from an engineering thermoplastic.

An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationary inner stator having stator windings.

In one embodiment, an electric machine is provided. The electric machine includes a machine housing and a stator disposed at least partially within the housing, the stator comprising a plurality of teeth and an aluminum winding wound around at least one tooth of the plurality of teeth. The electric machine further includes a radially embedded permanent magnet rotor disposed at least partially within the housing, the rotor comprising at least one radially embedded permanent magnet and configured to provide increased flux to reduce motor efficiency loss compared to a copper winding.

In one embodiment, an electric machine is provided. The electric machine includes a machine housing and a stator disposed at least partially within the housing, the stator comprising a plurality of teeth and an aluminum winding wound around at least one tooth of the plurality of teeth. The electric machine further includes a radially embedded permanent magnet rotor disposed at least partially within the housing, the rotor comprising at least one radially embedded permanent magnet and configured to provide increased flux to reduce motor efficiency loss compared to a copper winding.

A stator coil lacing machine includes a carriage pivotably connected to a frame. The carriage supports a needle assembly and cord guide assembly. The needle assembly includes a needle, a needle rotation actuator that rotates the needle about its longitudinal axis, and a needle translation actuator that moves the needle along its longitudinal axis. The cord guide assembly includes a cord guide shaft, a cord guide wag actuator that rotates the cord guide shaft about its longitudinal axis, and a cord guide lift actuator that rotates the cord guide shaft about an axis transverse to its longitudinal axis. A carriage actuator pivots the carriage relative to the frame. The carriage actuator, the needle rotation actuator, the needle translation actuator, the cord guide wag actuator, and the cord guide lift actuator cooperate in a manner that results in lacing of the stator coil.

The armature of the present invention comprises windings which have ends to be inserted into a tubular terminal, and visually identifiable marks made on the windings to be used for confirming if the ends of the windings have been inserted into the tubular terminal up to a suitable depth. The marks of the armature of the present invention are made on portions of the windings which are always positioned at the outside of the terminal even when the ends of the windings are positioned at the inside of the tubular terminal.

Disclosed are various embodiments for an electric machine where the stator is a coil assembly and the rotor is a magnetic toroidal cylindrical tunnel or where the rotor is a coil assembly and the stator is a magnetic toroidal cylindrical tunnel.

Systems, methods, and computer program products for virtual machine testing of an electric machine (8). A test signature including parameter values measured during one or more static tests of the electric machine (8) is compared to a reference signature generated by performing a similar series of static tests on a reference machine (42). The reference machine (42) is then validated by subjecting the reference machine to full-load dynamic testing. The test and reference signatures may include a plurality of parameters each characterizing a physical property of the respective machines (8, 42) in one or more physical domains The parameters are selected so that the electric machine (8) can be qualified for operation in the field by comparing the test signature to the reference signature, thereby avoiding the need for full-load dynamic testing of the electric machine (8).

The invention relates to a method for producing an electrically conductive connection between a copper component 23, 23a and an aluminum component 24 by means of cold metal transfer welding, in which a welding wire is periodically moved back and forth from the material of a component to be welded.

A locking wedge system for securing a stator coil in a slot of a stator core includes a slot layer positioned on the stator coil to inhibit movement of the stator coil within the slot, an outer wedge including a first tapered surface, an inner locking wedge positioned on the slot layer, the inner locking wedge including a second tapered face that interfaces with the first tapered face, a locking member configured to lock the inner locking wedge to the stator core, and an interlocking mechanism to couple the outer wedge to the inner locking wedge.