The invention relates to a rotor
punching sheet, a rotor structure, a
permanent magnet motor and a pump, the pump comprises the
permanent magnet motor, the
permanent magnet motor comprises the rotor structure, the rotor structure comprises a rotor core and a permanent
magnet, the rotor core is formed by rotating and laminating a plurality of rotor
punching sheets, and each rotor
punching sheet comprises an eccentric arc sheet, a
magnetic leakage bridge and a punching sheet main body. P cavities are formed in the punching sheet body at intervals in the circumferential direction, an eccentric arc sheet is arranged in each cavity, the cavities are connected with the corresponding eccentric arc sheets through
magnetic leakage bridges, asymmetric V-shaped magnetic steel grooves are formed between the eccentric arc sheets and the corresponding cavities, and the
magnetic leakage bridges are located at the ends or corners of the magnetic steel grooves. The rotor iron core is formed by rotating and laminating the rotor punching sheets, so that the permanent magnets at different positions of the
magnet grooves are alternately distributed, and the asymmetric V-shaped magnetic steel grooves are adopted, so that the strength of the rotor structure can be ensured, the magnetic leakage amount of the rotor structure can be reduced, and the use cost of the permanent magnets is reduced; and the manufacturing cost of the permanent
magnet motor and the pump is also reduced.