Peak Force @ 10% Duty Lbs [N]
3-517
30-1530 13-171
[13-750] [133-6800] [60-760]
70-500 [310-2225] (15% duty)
5-54 [22-240]
1.58-150 [7-667]
2-50 [9-220] (static)
• Higher speeds are possible with special controls
• Unlimited strokes from 0.01 in [0.000254m] • Submicron positioning when coupled with an
appropriate feedback element and bearing system. • Acceleration up to 10g’s [98 m/s2]
DC Motors DC Controls AC Motors AC Controls
Linear Motor Product Characteristics Overview
Baldor offers the largest selection of linear motors and stages available to assure that you get the best linear motor solution for your application.
Take a rotary motor, split it radially along its axis of rotation and flatten it out. The result is a flat linear motor that produces direct linear force instead of torque. Why? Torque is force at a distance. Removing the distance (axis of rotation) leaves direct linear force. It follows that linear motors utilize the same controls as rotary motors. And similar to a rotary motor with rotary encoders, linear motor positioning is provided by a linear encoder.
H-1
Linear Motors
Linear Stages
Engineering Information
Overview
Software
Motion Controls
AC Controls AC Motors DC Controls DC Motors
Linear Motor Technology
Motor Series
Cog-free Iron Core Brushless Brushless
LMCF
LMBL
Brush
Linear Motors
AC Induction
AC Polynoid
LMBR
LMAC
LMPY
DC Non Commutated
LMNM
Single Axis
Stepper
Linear Motor Design Characteristics
Specification Ratings Acceleration Accuracy Repeatability Protection
Description Models with peak forces up to 1530 lbs [6800 N] with 10% duty cycle Standard and custom bearings available for up to 10 g’s (9.8 m/s) Up to 0.0001 in/ft (2.5 µm/300 mm) High repeatability models to 0.00004 inches (1 µm) Internal thermal switch
Linear motors are capable of force based on the following primary/secondary areas:
Linear Motor Stepper DC Brush and Brushless AC Linear Induction
F/A (Lb/in2) [N/cm2] at 100% Duty Cycle 2.5 [1.75] 2.5 [1.75] 0.25 [0.18]
NS TORQUE
NS
NS
FORCE
Imaginary process of unrolling a rotary motor.
A variation of the linear motor is the tubular linear motor. This design rolls up the motor about an axis parallel to its length. This results in a “noncommutated” motor. Designs are available with either a moving coil or moving magnets.
The same electromagnetic force that produces torque in a rotary motor also produces direct force in a linear motor. For example, a permanent magnet DC linear motor is similar to a permanent magnet DC rotary motor and an AC induction linear motor is similar to a squirrel cage induction motor.
N/A
[1]
[1]
[1]
[1]
0.00004 [1]
0.0004 [10]
0.0002 [5.08]
Positioning Type
Closed Loop
Closed Loop
Closed Loop
Open or
Open or
Open or
Closed Loop Closed Loop Closed Loop
Open Loop
Open Loop
Control
3-Phase Brusrushless
LMSS
Dual Axis Stepper
LMDS
Continuous Force Lbs [N]
1-173 [4-250]
10-500
4.2-55
[44-2220] [20-245]
15-100 [67-445]
1-20 [4-90]
0.5-50 [2-220]
2-50 [9-220]
2.5-30 [10-130]
AccuracyQ
0.0001
0.0001
0.0001
0.0001
N/A
in/ft [µm/300mm] R
[25]
[2.5]
[2.5]
[2.5]
0.0001 [2.5]
0.001 [2.5]
0.001 [25]
RepeatabilityQ in [µm] R
0.00004 0.00004 0.00004 0.00004 W
Tubular non-commutated DC Linear Motor.
Linear Motor Performance
Linear motor output is measured in Lbs. [N] of force or thrust:
• Linear motors provide force to 2000 Lbs. [8900N], and speeds to 200 in/sec [5 m/s] depending upon encoder resolution.
Advantages of Linear Motors
• High speeds – 200 in/sec [5 m/s] with encoder resolution > 1 micron
• High accelerations – up to 10 g’s [98 m/s] • Small, compact – fits into smaller spaces • Unlimited strokes from 0.01 in [0.000254 m] • Submicron positioning when coupled with appropriate
60
[5]
[5]
[1.8]
2000 [50.8]
[2.3]
[2.5]
[2]
[1.5]
@ 400 Hz
@400Hz
Maximum Stroke in[m]
Unlimited Unlimited
132
Unlimited
120
[3.2]
[3]
4 [0.10]
144
36 x 59
[3.7]
[0.914x1.498]
and reduces maintenance
Types of Linear Motors Baldor offers many types of linear motors to meet a variety of application requirements.