Improved structure of motor

The utility model discloses an improved structure of a motor, belongs to the motor, and aims to provide the motor enabling the service life of a motor bearing to be prolonged. The improved structure of the motor comprises a chassis composed of a front end cover and a back end cover, and a rotor which is supported in the chassis via a motor shaft. Permanent magnets (2) are fixed on the rotor (5) or the motor shaft (6), and electromagnets (4) are fixed on the back end cover (1). According to the utility model, by changing the direction and size of a current to adjust the polarity and magnetic force of the electromagnets, the axial force acting on the motor shaft can be offset, so that the purposes of protecting the bearing and prolonging the service life are achieved. The improved structure of the motor has the advantages of being simple in structure improvement, good in reliability, low in cost, etc.