Parallel hybrid excitation brushless direct-current motor

The invention discloses a parallel hybrid excitation brushless direct-current motor. The rotors of both a permanent-magnet synchronous motor and an electrical excitation double-salient-pole motor are arranged coaxially, and the stators are respectively arranged on the left side and the right side inside a shell; the iron cores of the stators share one set of armature winding; an excitation winding is arranged on the iron core of the stator of the electrical excitation double-salient-pole motor; the coils of all turns of all phases of armature windings of the hybrid excitation motor penetrate through two adjacent stator teeth in the same group of the permanent-magnet synchronous motor and corresponding stator poles of the electrical excitation double-salient-pole motor at the same time; the armature winding of the permanent-magnet synchronous motor has the same phase sequence and phase winding distribution as the armature winding of the electrical excitation double-salient-pole motor; and all phases of windings are winded on the stator teeth of the permanent-magnet synchronous motor and the stator poles of the electrical excitation double-salient-pole motor at the same time and closed after passing through the iron cores of the stators of the permanent-magnet synchronous motor and the electrical excitation double-salient-pole motor. The hybrid excitation motor has high winding utilization rate and wide air-gap magnetic field adjustment range and can effectively solve the problem on deexcitation protection during the short circuit inside the motor.