The Structure Of Direct-Drive Motor - Mitsubishi Electric CNC Specifications And Instruction Manual

Direct Drive Motor Specifications and Instruction Manual
6 Assembly and Installation

6.2 The Structure of Direct-drive Motor

(1) Stator
The stator has laminated cores to which windings are applied. The
cores are protected by mold.
Compared with metal parts, the mold is susceptible to breaking or
cracking due to shock or stress, which may deteriorate the
product's quality. Pay special attention in carrying and installing
not to damage the mold.
(2) Rotor
Permanent magnets are on the core of the rotor, and mold is
applied to the surface of it. As it has permanent magnets,
magnetic attraction force is generated between it and magnetic
material as iron. The magnetic attraction force is generated mainly on the magnet side (outer surface of rotor).
(Almost no attraction force is generated on the inner surface.)
Take safety measure in handling to avoid accidents due to the attraction force. In addition, the magnetic force is
released into the air, so do not make devices that are affected by the magnetic force such as pacemaker, watch,
etc. approach to the product.
< Example of direct-drive motor structure >
Bearing (Prepared by user)
Bearing housing (opposite lead wire side)
(Prepared by user)
CAUTION
1. O-rings for the cooling jacket are required to carry out a forced liquid cooling of the motor. O-rings are not provided with
this motor, so the optimum ones should be prepared by users.
2. The motor's lead wires are non movable cables. Fix the lead wire section not to move. The bending radius of the lead
wires should be five times or more than its own diameter.
3. Make sure to take dust- and water-proof measures since this motor is rated IP00. The protection class of the motor
assembling section should be IP54 or higher. If foreign matters enter the gap between the stator and the rotor, trouble
may occur. Additionally, continuous exposure to oil or water may cause insulation degradation or rust.
Cooling jacket (Prepared by user)
O-ring (Prepared by user)
Rotor (Mitsubishi)
43
Laminated
Frame
core
Motor coil
Mold
(1) Stator
Stator (Mitsubishi)
Bearing (Prepared by user)
Shaft (Prepared by user)
Encoder (Prepared by user)
Bearing housing (lead wire side)
(Prepared by user)
Permanent
magnet Mold
Core
(2) Rotor
IB-1501068-C