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For many industrial applications, upgrading the machine performance by changing the rotor structure while keeping or slightly modifying the stator structure is an economic and effective solution for complying with the existing production line. Electromagnetic torque is always one of the key factors that need to be evaluated. An intuitive and universal approach applying the same principle for torque...
A novel brushless compound-structure permanent-magnet synchronous machine (CS-PMSM) is proposed in this paper. The structural characteristics are described and the operation principle is introduced. The equivalent magnetic circuit of the BDRM is established, and the electromagnetic torque is deduced by analytical method. The new type of brushless CS-PMSM consists of one stator machine (SM) and one...
Compound-structure permanent-magnet synchronous machine (CS-PMSM), which is composed by two electric machines, is a new type of machine developed these years. It has a wide application prospect on hybrid electric vehicle (HEV). One of the main disadvantages of this machine is that as one of the rotors has armature winding in it, a brush and slip rings must be used. Some research work has been done...
A four-quadrant transducer (4QT), which is a hybrid electric vehicle power train concept, is a structural integration of two permanent-magnet synchronous machines. It comprises three parts: stator, outer rotor, and inner rotor. As the outer rotor is a structural and magnetic common part of the two radial-flux machines, the magnetic circuits of the two machines are coupled. A new method is put forward...
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