Dynamically reconfigurable synchronous motors and generators

A system comprising:

• a motor having a plurality of phase windings, a rotor, an air gap, and a stator magnetically coupled to the rotor through the air gap, wherein;
• the plurality of phase windings is configured to generate a first magnetic field in the air gap, and wherein a pole number of the first magnetic field is configured to be dynamically adjustable through controlling currents in the plurality of phase windings, and wherein the plurality of phase windings is located on at least one of the stator and the rotor;
• and
• a plurality of poles facing the air gap is configured to generate a second magnetic field in the air gap, comprising:
• a group of unchanged poles, wherein each unchanged pole has a fixed polarity;
• and
• a group of reversible poles, each having a field winding around a pole body, wherein a polarity of each reversible pole is configured to be changed during an operation mode, and after a polarity of one reversible pole has been changed has been changed, the one reversible pole and two respective adjacent unchanged poles of a same polarity are in effect merged into one augmented pole, and wherein as a result of having the one augmented pole, a pole number of the second magnetic field is changed;
• a plurality of power inverters coupled to the plurality of phase windings, wherein the plurality of power inverters is configured to control currents of the plurality of phase windings such that the pole number of the first magnetic field is dynamically adjusted during the operation mode;
• and
• a field current regulator coupled to the group of reversible poles and configured to change directions of currents in field windings in the operation mode such that polarities of the group of reversible poles are changed in synchronization with a pole number adjustment of the first magnetic field.