Motor controller

A motor controller for controlling a drive of a motor having multiple phase windings, the motor controller comprising:

• a plurality of upper and lower arm circuits formed by a plurality of switches;
• and
• a control unit switching on/off states of the plurality of switches to sequentially switch an energized phase among a plurality of phases, wherein,
• among the plurality of switches, a switch or switches that form an energization path to the energized phase is designated as an energized phase switch or switches, and a switch or switches other than the energized phase switch is designated as a non-energized phase switch or switches,
• among the plurality of non-energized phase switches, a switch or a switches forming a path of a reflux current generated by the switching of the energized phase is designated as a reflux switch or switches, and
• the control unit controls the reflux switch or switches into an ON state in addition to controlling the energized phase switch or switches.