BLDC BLDC Motor with Cogging Torque Reduction Structure

摘要

The present invention relates to a high-speed rotation spindle (SPINDLE) BLDC motor for a grinding machine. A plurality of permanent magnet pieces 321 to 324 that generate magnetic force for a coking torque reduction structure that minimizes vibration deviation of the rotor 300 during high-speed rotation is formed at a predetermined angle in the circumferential direction so that at least some of them overlap each other up and down, respectively. The magnetic core 230 that provides the rotor 300 to maintain the twisted skew angle and is coupled to the coil 210 is a permanent magnet 320 with a plurality of slots 231 to 236 overlapping each other at least in part up and down. High-speed rotation spindle for grinding machine that can minimize the vibration caused by the caulking torque during high-speed rotation because it is possible to reduce the caulking torque according to the vertical overlap while maintaining the skew angle twisted at a constant angle in the opposite direction to the circumferential direction of A BLDC motor 400 is provided. In addition, in the present invention, the permanent magnet 320 in which the shaft of the rotor 300 is coupled to the core shaft 310 in the high-speed rotation motor and the separation prevention cap 330 are vertically mechanically coupled to the permanent magnet during high-speed rotation. It provides a high-speed rotation spindle (SPINDIE) BLDC motor 400 for a grinding machine capable of stable high-speed rotation by preventing the 320 from being separated.