Stacked-winding stator electrical machine

A stacked-winding stator for an axial flux electrical machine configured for use with a multi-phase power supply, the stacked-winding stator comprising:

• a first stator portion comprising a first plurality of conductive coils;
• and
• a second stator portion comprising a second plurality of conductive coils;
• wherein each conductive coil in the first plurality of conductive coils and the second plurality of conductive coils comprises at least one pair of active sections, wherein each active section extends in a generally radial direction substantially perpendicular to an axis of rotation of the electrical machine;
• wherein the first stator portion and the second stator portion are axially aligned and each comprise spaces between adjacent active sections for receiving flux guides, the spaces in the first stator portion being circumferentially aligned with the spaces in the second stator portion;
• and
• wherein each conductive coil in the first plurality of conductive coils has a corresponding conductive coil in the second plurality of conductive coils electrically connected to it to form a set of conductive coils.

An electric machine configured for use with a multi-phase power supply, the electric machine comprising:

• a stacked-winding stator for an axial flux electrical machine configured for use with a multi-phase power supply, the stacked-winding stator comprising:
• a first stator portion comprising a first plurality of conductive coils;
• and
• a second stator portion comprising a second plurality of conductive coils;
• wherein each conductive coil in the first plurality of conductive coils and the second plurality of conductive coils comprises at least one pair of active sections, wherein each active section extends in a generally radial direction substantially perpendicular to an axis of rotation of the electrical machine;
• wherein the first stator portion and the second stator portion are axially aligned and each comprise spaces between adjacent active sections for receiving flux guides, the spaces in the first stator portion being circumferentially aligned with the spaces in the second stator portion;
• and
• wherein each conductive coil in the first plurality of conductive coils has a corresponding conductive coil in the second plurality of conductive coils electrically connected to it to form a set of conductive coils;
• the electric machine further comprising:
• a first rotor portion disposed at a first axial end of the stacked-winding stator;
• and
• a second rotor portion disposed at a second axial end of the stacked-winding stator.

A conductive coil comprising at least one pair of active sections, a first terminal portion and a second terminal portion;

• wherein the first terminal portion is configured to extend axially in the first direction for connection to the first busbar arrangement;
• and
• wherein the second terminal portion is configured to extend axially in the second direction for connection to a connector, the second terminal portion having an extended portion configured to extend beyond the second stator portion in the second direction;
• and
• wherein the conductive coil is for use in a first stator portion of a stacked-winding stator for an axial flux electrical machine configured for use with a multi-phase power supply, the stacked-winding stator comprising a first stator portion comprising a first plurality of conductive coils and a second stator portion comprising a second plurality of conductive coils;
• wherein the active sections are configured to extend in a generally radial direction substantially perpendicular to an axis of rotation of the electrical machine;
• wherein the first stator portion and the second stator portion are axially aligned and each comprise spaces between adjacent active sections for receiving flux guides, the spaces in the first stator portion being circumferentially aligned with the spaces in the second stator portion;
• and
• wherein each conductive coil in the first plurality of conductive coils has a corresponding conductive coil in the second plurality of conductive coils electrically connected to it to form a set of conductive coils.

A conductive coil comprising at least one pair of active sections, a first terminal portion and a second terminal portion;

• wherein the first terminal portion is configured to extend axially in the second direction for connection to the second busbar arrangement;
• and
• wherein the second terminal portion is configured to extend axially in the second direction for connection to a connector;
• and
• wherein the conductive coil is for use in a second stator portion of a stacked-winding stator for an axial flux electrical machine configured for use with a multi-phase power supply, the stacked-winding stator comprising a first stator portion comprising a first plurality of conductive coils and a second stator portion comprising a second plurality of conductive coils;
• wherein the active sections are configured to extend in a generally radial direction substantially perpendicular to an axis of rotation of the electrical machine;
• wherein the first stator portion and the second stator portion are axially aligned and each comprise spaces between adjacent active sections for receiving flux guides, the spaces in the first stator portion being circumferentially aligned with the spaces in the second stator portion;
• and
• wherein each conductive coil in the first plurality of conductive coils has a corresponding conductive coil in the second plurality of conductive coils electrically connected to it to form a set of conductive coils.