Motor unit with dual internal and external electric brushes

The invention relates to a motor unit with dual internal and external electric brushes. The motor unit comprises a basic motor (1) and a drive motor (2). The drive motor (2) comprises a shell (2.1), a rotor (2.2) and a stator (2.3). An output shaft of the basic motor (1) is connected with the shell (2.1). A power supply system (3) is also arranged on the drive motor (2), and comprises a rotor power supply system and a stator power supply system. The motor unit with the dual internal and external electric brushes has high torque and high rotating speed, and can be concatenated according to needs; when motors are selected for a load, the limitation that only one motor with high power is selected is broken, and a plurality of motors with relatively lower power can be selected for concatenation; part of motors can be stopped when the high torque is not required, so the motor unit is more energy-saving and more powerful; and a plurality of high-speed motors can be concatenated to realize ultra high speed output which is times that of a single motor, and troubles caused by manufacturing bottlenecks can be avoided.