Sanyo Denki SANMOTION 3E S, Instruction Manual, Page: 391 / 488

11.2 Linear motor sizing
11-6
1
1
Selection
11.2 Linear motor sizing
It is estimated that selection of linear motor capacity computes required linear motor capacity
from machine specification (composition). Here, the fundamental formula is described.
11.2.1 Flowchart of linear motor sizing
(1) Tentatively select motor size
Tentatively select coil whose maximum force
satisfies the necessary force for use.
(At least “load mass

maximum accel

”
or more is needed.)
(2) Calculate maximum necessary force
Calculate necessary maximum force in
consideration of motor mass, friction, and gravity.
Confirm that the maximum force of tentatively
selected motor is necessary maximum force or
over. Having a margin of 10

or more is
recommended in consideration of load fluctuation.
(3) Calculate effective force
Confirm that the continuous rated force of
tentatively selected motor is necessary effective
force or over.
Having a margin of 10

or more is recommended
in consideration of load fluctuation.
(4) Select magnet rail
Select magnet rail to satisfy the necessary stroke
for tentatively selected motor.
(5) Verify free-running distance when dynamic
brake activated.
Calculate free-running distance of dynamic brake
on tentatively selected motor, and confirm that no
problems with operation.
(6) Verify instantaneous tolerance of dynamic
brake.
Calculate energy for single activation of dynamic
brake of selected motor consumed by dynamic
brake resistor, and then confirm the energy is
amplifier allowable value or less.
(8) Calculate regenerative power
Calculate regenerative power of selected motor,
and then confirm that the power is regenerative
resistor allowable power or less.
(9) Review motor capacity
Tentatively select motor size
Calculate effective force
Calculate regenerative power
Review motor capacity
(1)
Yes
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
No
Select magnet rail
Verify instantaneous tolerance
of dynamic brake
Verify free-running distance
when dynamic brake activated.
Start
Completed
Judge
Calculate maximum necessary
force