Patent ID: 9559572
Date: 2017-01-31
CPC Classifications: H02K,Y10T

Claim:
1. A method for manufacturing a permanent-magnet motor rotor, comprising: (a) providing a magnetic yoke unit, wherein the magnetic yoke unit comprises multiple pole shoe parts and an iron core part, wherein the pole shoe parts are arranged around the iron core part, wherein the pole shoe parts are independent of each other and uniformly distributed, wherein each of the pole shoe parts and the iron core part are connected via a connecting strip, wherein the pole shoe parts, the connecting strip, and the iron core part form a positioning hole for housing a permanent magnet axially, wherein the pole shoe parts are provided with a pole-shoe bolt through hole for insertion of a pole-shoe tightening bolt, and wherein the iron core part is provided with an iron-core bolt through hole for insertion of an iron-core tightening bolt; (b) forming a rotor spacer made of a non-magnetic material, wherein the rotor spacer is provided thereon with a permanent-magnet through hole for insertion of the permanent magnet, and wherein the rotor spacer is provided thereon with a pole-shoe bolt through hole for insertion of the pole-shoe tightening bolt and an iron-core bolt through hole for insertion of the iron-core tightening bolt; (c) arranging one or more of the magnetic yoke unit and the rotor spacer on a rotary shaft, wherein the magnetic yoke unit and the rotor spacer are distributed axially at regular intervals on the rotary shaft, and wherein the rotor spacer divides the rotor structure into multiple rotor units in an axial direction, wherein all positioning holes of the magnetic yoke unit correspond to each other to form a positioning passage, wherein the positioning passage corresponds to the permanent-magnet through hole of the rotor spacer to form a permanent-magnet passage, wherein the pole-shoe bolt through hole of the magnetic yoke unit corresponds to the pole-shoe bolt through hole of the rotor spacer to form a pole-shoe bolt passage for insertion of the pole-shoe tightening bolt, wherein the iron-core bolt through hole of the magnetic yoke unit corresponds to the iron-core bolt through hole of the rotor spacer to form an iron-core bolt passage for insertion of the iron-core tightening bolt; (d) inserting the permanent magnet into the permanent-magnet passage, wherein the permanent magnet is in clearance fit with the permanent-magnet passage; (e) inserting the pole-shoe tightening bolt into each pole-shoe bolt passage, wherein the pole-shoe tightening bolt is in clearance fit with the pole-shoe bolt passage; inserting the iron-core tightening bolt into the iron-core bolt passage, wherein the iron-core tightening bolt is in clearance fit with the iron-core bolt passage; placing nuts on ends of the pole-shoe tightening bolt and the iron-core tightening bolt to connect the magnetic yoke unit and the rotor spacer; (f) cutting off a mid-section of the connecting strip; and installing a front end plate and a rear end plate, respectively, to enclose a front end and a rear end of the rotor structure to form the permanent-magnet motor rotor.