Linear Motor Overview - Delta ASDA-A3 Series User Manual

ASDA-A3

11.1 Linear motor overview

Linear motor can directly convert electrical energy into linear kinetic energy, and its mover and
stator structures are different from those of a permanent-magnet rotary motor. The use of a
linear motor reduces the number of parts used in the machine. The direct drive method not only
eliminates backlash, but also reduces the complexity of the machine and improves reliability.
The linear motor drive speed is faster than the rotary motor connected to the ball screw.
In applications with longer stroke, be aware that the ball screw being too long causes the screw
to droop and creates more friction, which results in wearing of the screw. The linear motor
adopts a modular design which can connect to unlimited number of modules, so there are
relatively few restrictions on the stroke.
The linear motor uses the linear scale or magnetic scale to get the feedback position instead of
the rotary encoder in the rotary motor. When a linear motor is used, it is recommended that you
install a Hall sensor and temperature sensor. The temperature sensor can directly monitor the
actual temperature of the linear motor, providing further protection for the motor. For more
information about the Hall sensor, refer to Section 11.5.
Note: for the Hall sensor setting, refer to PM.003 in Chapter 8; for the temperature sensor setting,
refer to PM.022 in Chapter 8.
(1)
Linear motor
N S N S N S N S N S N S
(2)
Flat type (iron core) linear motor
U-shaped linear motor
N S N S N S N S N S N S
(1)
N S N S N S N S N S N S
Linear Motor and Third-Party Motor
(1)
U V W U V W
U V W U V W
(1)
(1)
(2)
(2)
(2)
11
(2)
N S
N S
11-3