CPC Subgroup
H02K 19/32 for pole-changing
Full Title
Synchronous motors or generators (having permanent magnets H02K21/00) > Synchronous generators > characterised by the arrangement of exciting windings > for pole-changing
H02K 19/32 Synchronous motors or generators (having permanent magnets H02K21/00) > Synchronous generators > characterised by the arrangement of exciting windings > for pole-changing