The invention discloses a rotor circuit double-ended excitation type
hybrid excitation electrical
machine comprising a housing. A
stator composed of an armature core and an armature winding and a rotor composed of an N-pole
magnet yoke, an N-pole shoe, an S-pole
magnet yoke, an S-pole shoe, a permanent
magnet magnetized in a tangential manner and a spindle are installed in the housing. Two ends in the axial direction are provided with an electric excitation device respectively. The main pole air-gap
magnetic field of the electrical
machine is generated by the permanent magnet and electric excitation devices collectively, brushless electric excitation can be realized through the excitation devices, so smooth adjustment can be performed on the main pole air-gap
magnetic field in a certain range, when the electrical
machine is used in an electromotor, the
magnetic field is adjusted to make the electrical machine comprise a wide
constant power region to realize weak
magnetism speed raising, when the electrical machine is used as a generator, the
voltage adjustment requirement can be satisfied through the design of structure parameters, compared with the prior art, advantages of short axial
magnetic circuit, the
magnetism-collected
structure type permanent magnet, large air-gap magnetic field and high efficiency can be realized; additionally, the axial structure is symmetrical, the rotor weight is distributed evenly in the axial direction, stresses on left and right bearings are consistent; a magnetic bridge is located at the axial end, and the
assembly is convenient.