Radial magnetic circuit multistage monopole unequal-tooth-width speed reduction type motor protector

The invention provides a radial magnetic circuit multistage monopole unequal-tooth-width speed reduction type motor protector and belongs to the technical field of motor protection devices. The radial magnetic circuit multistage monopole unequal-tooth-width speed reduction type motor protector aims at solving the problem that at present, due to the fact that no motor protector exists, the using performance of a motor is reduced, the service life of the motor is shortened, and the maintenance cost of the motor is increased. A disk-shaped permanent magnet is fixedly installed in a non-magnetic stainless steel sleeve, two round magnetic stainless steel baffles are fixed to two ends in the non-magnetic stainless steel sleeve, a magnetic stainless steel sleeve is fixed in an installing hole formed in the disk-shaped permanent magnet and is coaxial with shaft holes of the two round magnetic stainless steel baffles, and a plurality of unequal-tooth-width teeth are machined on the inner circumferential face of the magnetic stainless steel sleeve in the radial direction. An output shaft of the motor penetrates through multiple radial magnetic circuit multistage monopole unequal-tooth-width speed reduction type motor protectors, and gaps are reserved between the circumferential faces of tooth crests of a plurality of unequal-tooth-width teeth of the magnetic stainless steel sleeve and the inner circumferential faces of the shaft holes of the two round magnetic stainless steel baffles and the output shaft of the motor. The radial magnetic circuit multistage monopole unequal-tooth-width speed reduction type motor protector is used on a larger-space occasion and used for motor protection.