A coil unit may include an even number of coils comprising a first coil and a second coil; and a coil holding member which holds the even number of the coils. An outer peripheral face of the coil holding member may include a side-face pair comprising a first side face and a second side face which are substantially parallel to each other. The first side face may be formed with a first protruded part around which the first coil is wound, the first protruded part being protruded to an outer peripheral side with respect to the coil holding member. The second side face may be formed with a second protruded part around which the second coil is wound, the second protruded part being protruded to an outer peripheral side with respect to the coil holding member. The first coil and the second coil may be structured from one conducting wire.

A current transformer includes first and second bobbins, and a secondary winding. The first bobbin includes a first tube defining a first longitudinal axis. First and second flanges are disposed on first and second ends of the first tube. The first tube, the first and second flanges collectively define a first slit along the first longitudinal axis. The first slit allows receipt of a primary conductor into the first tube. The second bobbin includes a second tube rotatably received about the first tube. The second tube defines a second slit along the second longitudinal axis. The second slit allows receipt of the primary conductor into the first and second tubes. The secondary winding is wound about the first bobbin and extends along the first longitudinal axis, passing through the first tube and over the first and second flanges. The second tube rotates about the second longitudinal axis relative to the first tube.

Disclosed are a method and device for winding a foil coil of a stereoscopic wound iron core transformer. The device includes a rotating assembly, a driving device and a plurality of loading assemblies; the rotating assembly is provided with a through hole matched with an iron core post, the rotating assembly is provided with a gear plate and a track ring around the through hole, and the gear plate and the track ring are fixedly connected by a fixing block; the loading assembly includes a cylinder and a tension device, and the cylinder is movably connected with the rotating assembly; and a driving end of the driving device is connected with the gear plate.

The present invention relates to a stator coil winding machine including: a stator transfer unit adapted to transfer a linear type stator having a plurality of stator cores in directions of X and Y axes; a winding guide unit adapted to guide the transferred stator to coil winding; a winding unit adapted to wind a coil on the stator; a tension adjusting unit adapted to adjust tension on the coil being wound on the stator; and a controller adapted to control operations of the stator transfer unit, the winding guide unit, and the winding unit to allow the coil to be wound on the stator by means of three-phase Y connection, based on a previously set winding sequence.

The present invention relates to a stator coil winding machine including: a stator transfer unit adapted to transfer a linear type stator having a plurality of stator cores in directions of X and Y axes; a winding guide unit adapted to guide the transferred stator to coil winding; a winding unit adapted to wind a coil on the stator; a tension adjusting unit adapted to adjust tension on the coil being wound on the stator; and a controller adapted to control operations of the stator transfer unit, the winding guide unit, and the winding unit to allow the coil to be wound on the stator by means of three-phase Y connection, based on a previously set winding sequence.

The nozzle has an inclination angle relative to a rotation shaft, substantially equal to half of an angle between adjacent magnetic poles of a rotor. A wire is wound on a first portion of a magnetic pole by linearly moving the rotation shaft together with the nozzle in a first direction parallel to an axis of the rotor. Thereafter, the nozzle is rotated about the rotation shaft in a second direction by approximately 180 degrees, whereby the wire is wound on a second portion of the magnetic pole. Thereafter, the rotation shaft is linearly moved together with the nozzle in a direction opposite to the first direction, whereby the wire is wound on a third portion of the magnetic pole. Thereafter, the nozzle is rotated about the rotation shaft in the second direction by approximately 180 degrees, whereby the wire is wound on a fourth portion of the magnetic pole.

The nozzle has an inclination angle relative to a rotation shaft, substantially equal to half of an angle between adjacent magnetic poles of a rotor. A wire is wound on a first portion of a magnetic pole by linearly moving the rotation shaft together with the nozzle in a first direction parallel to an axis of the rotor. Thereafter, the nozzle is rotated about the rotation shaft in a second direction by approximately 180 degrees, whereby the wire is wound on a second portion of the magnetic pole. Thereafter, the rotation shaft is linearly moved together with the nozzle in a direction opposite to the first direction, whereby the wire is wound on a third portion of the magnetic pole. Thereafter, the nozzle is rotated about the rotation shaft in the second direction by approximately 180 degrees, whereby the wire is wound on a fourth portion of the magnetic pole.