Multi-phase motor switching device and multi-phase motor

A multi-phase motor switching device for use in a multi-phase motor provided with multi-phase coils, the multi-phase coils each including a plurality of coil parts, the multi-phase motor switching device comprising:

• a switching unit configured to switch at least some of the plurality of coil parts of each of the multi-phase coils between a series connection and a parallel connection;
• wherein the multi-phase coils each include a plurality of coil wire parts,
• the multi-phase motor switching device further comprises a connection switching unit configured to switch a connection state of the plurality of coil wire parts of each multi-phase coil,
• the coil wire parts of each multi-phase coil include a first coil wire part and a second coil wire part, and
• the connection switching unit is switched between a first connection state in which current flow control of the first coil wire part and the second coil wire part of the multi-phase coil is possible, a second connection state in which current flow control of the first coil wire part of the multi-phase coil is possible and current flow control of the second coil wire part of the multi-phase coil is interrupted, and a third connection state in which current flow control of the second coil wire part of the multi-phase coil is possible and current flow control of the first coil wire part of the multi-phase coil is interrupted.