Low thrust pulsation permanent magnet linear motor

The invention discloses a low thrust pulsation permanent magnet linear motor, comprising a long-strip secondary pole and a primary pole which is on the secondary pole and can move along the length direction of the secondary pole. Gaps are arranged between the lower surface of the primary pole and the upper surface of the secondary pole on a support frame. The secondary pole is formed by arranging a plurality of iron chips in a front-rear vertical overlying manner in sequence. The lower part of each iron chip is provided with straight teeth in a fractional-slot structure. Adjacent straight teeth form a straight channel. Coils are arranged on the straight channels which are in odd number or even number and are arranged from left to right. The secondary pole comprises a long-strip magnet yoke, bar permanent magnets which are arranged in a front-rear row manner at interval on the upper surface of the magnet yoke. In the same row of permanent magnets, adjacent permanent magnets are arranged at interval. Polarity of the same direction ends of adjacent permanent magnets in the same row of permanent magnets is different, and polarity of close ends of opposite permanent magnets in the two rows of permanent magnets is the same. The low thrust pulsation permanent magnet linear motor is characterized in that linear motor thrust pulsation is effectively restrained through restraining end detent forces and cogging forces.