Linear Motor Overview - Delta ASDA-A3 Series User Manual

Linear Motor

11.1 Linear motor overview

Linear motor can directly convert electrical energy into linear energy, and its mover and stator
structures are different from those of a permanent magnet rotary motor. The use of a linear motor
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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 ballscrew.
In applications with longer stroke, take into account that the ballscrew is too long causing the
screw to droop and creating 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 using a linear motor, it is suggested to install a Hall
sensor and temperature sensor. The temperature sensor can directly monitor the actual
temperature of the linear motor, so the motor has an extra layer of protection. For more
information about the Hall sensor, refer to Section 11.4.
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.
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ASDA-A3