Magnetic gear

A magnetic gear comprising:

• a first permanent magnet field having a plurality of permanent magnet magnetic poles;
• a second permanent magnet field having a plurality of permanent magnet magnetic poles, number of poles of which magnet is different from that of the first permanent magnet field;
• and
• a modulating magnetic pole arranged between the first permanent magnet field and the second permanent magnet field and having a plurality of pole pieces to modulate the number of poles of the first and second permanent magnet fields,
• wherein a plurality of non-magnetic bars are provided between the plurality of pole pieces,
• one ends of the plurality of non-magnetic bars are connected to a first non-magnetic end holding member and the other ends of the plurality of non-magnetic bars are electrically insulated from and connected to a second non-magnetic end holding member, and
• the second non-magnetic end holding member comprises means for preventing structural disassembly caused by a centrifugal force in rotation.

A magnetic gear comprising:

• a first permanent magnet field having a plurality of permanent magnet magnetic poles;
• a second permanent magnet field having a plurality of permanent magnet magnetic poles, number of poles of which magnet is different from that of the first permanent magnet field;
• and
• a modulating magnetic pole arranged between the first permanent magnet field and the second permanent magnet field and having a plurality of pole pieces to modulate the number of poles of the first and second permanent magnet fields,
• wherein a plurality of non-magnetic bars are provided between the plurality of pole pieces,
• one ends of the plurality of non-magnetic bars are connected to a first non-magnetic end holding member and the other ends of the plurality of non-magnetic bars are electrically insulated from and connected to a second non-magnetic end holding member,
• the plurality of non-magnetic bars are arranged approximately intermediate between the first permanent magnet field and the second permanent magnet field, and
• length of the plurality of non-magnetic bars from the first permanent magnet field toward the second permanent magnet field is different from length of the pole pieces from the first permanent magnet field toward the second permanent magnet field.