DC Linear Brushless Motors
Product Info | Applications
| Operating Info | Ordering Info |
Dimensions | Specifications |
Custom Application Samples
Featured Product:
DC Linear Brushless Motors
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Product Info:
| Travel |
Unlimited |
Unlimited |
| Velocity |
0.1 to 240 inches/sec |
[0.25mm to 6 m/s] |
| Acceleration |
0.1 to 12 G's |
0.1 to 12 G's |
| Peak Force |
15 to 1600 lbs |
[66 to 6600 N] |
| Continuous Force |
5 to 500 lbs |
[22 to 2200 N] |
The 3 phase brushless (or AC servo) linear motor is ideal for long stroke, closed loop servo, linear motion applications. They can be used at
speeds up to 240 in / sec [6 m / sec]. They are capable of very precise position, velocity and acceleration control when coupled with a linear encoder.
The 3-phase coil assembly can be commutated trapezoidally using integral Hall Effects or sinusoidally using software commutation in conjunction with
the appropriate motion controller and sinusoidal amplifier.
The short encapsulated moving coil assembly moves thru a gap in the long "U" shaped magnet assembly. A customer supplied bearing system is required to
guide the moving coil assembly and to maintain a .025" [0.63 mm] clearance between the magnet and the coil assembly.
The power to the motor (from a customer supplied PWM 3 phase brushless servo amplifier) is supplied to the moving secondary via a power cable.
Larger motors with higher forces are available, consult factory for details and drawings.
The motors are available in 3 different cross sections and 5 different coil assembly lengths.
Advantages:
- Zero cogging
- High speed and accelerations of light loads
- Low moving mass
- Uses standard 3 phase brushless amplifier
Applications:
- Pick and Place Machines
- Coordinate measuring machines
- Laser and Water jet cutters
- Vision Inspection Equipment
The Brushless Linear Motor consists of 2 main parts
- Long Stationary Magnet Assembly: The "U" shaped magnet assembly is made up of nickel-plated steel back iron
and Neodymium permanent magnets. The magnets are bonded to the 2 parallel steel plates and the plates are bolted to a steel
spacer bar. Threaded and thru holes are available in the steel back iron for mounting the magnet assembly to the customer
supplied base plate. The magnet assembly is available in widths from 1.59" to 2.65 " [40.4 mm to 67.3 mm]. The length of
the magnet assembly is a function of the stroke. Single piece motors are available as long as 36 inches [0.91 m] for series
BLSA & BLSB motors and 66 inches [1.67 m] for series BLSC motors . Longer motors will be supplied in modular sections.
- Short Moving Coil Assembly: The coil assembly is comprised of a 3 phase copper motor winding, an aluminum
mounting bracket and an optional Hall Effect board that are all vacuum encapsulated with epoxy. Mounting holes in the
aluminum bracket are provided for attaching the secondary to the moving member of the customer supplied table assembly.
The coil assembly is available in many different widths and lengths, to meet the customers force and packaging requirements.
Multiple coils can be supplied with a single magnet assembly to allow for independent moving heads or they can be coupled
together to produce larger forces. The standard lengths for the coil assemblies are from 3.20" [81.3 mm] to 12.80" [325 mm].
Operating Info:
Required Electronics:
The motor requires either a trapezoidal or sinusoidal 3 phase brushless amplifier with power supply that is rated with sufficient
current and voltage to meet the motion requirements. The inductance of the linear motor coil should be greater than the minimum load
inductance of the servo amplifier.
Environmental Considerations:
The brushless motor is an open type motor and should not be mounted in an environment that is wet or excessively dirty.
It should be protected with some type of bellows or cover when installed by the customer.
Mounting:
The brushless linear motor should be mounted to flat (better than .003"/ ft [246 microns / m] and stiff surface. Threaded and thru holes
in the magnet assembly and threaded holes in the coil assembly are present for the mounting of the motor to the customers system. A cable
carrier must be provided by the customer to route the motor and Hall Effect cable. The motor may be mounted in any orientation.
Maintenance:
The ball bearing guides in the stage should be periodically lubricated with the manufacturers recommended grease. The open glass encoder scale
should be wiped with a glass cleaner occasionally to ensure trouble free operation.
Ordering Info:
DC brushless motors can be ordered for any stroke and any peak force up to 240 lbs. Higher forces can be achieved by adding additional coil
assemblies in series (consult factory for more information)
Dimensions:
Specifications:
| | Model # | Image | Force Constant | Continuous Force | Peak Force | Continuous Current | Peak Current @ 10% Duty | Back EMF | Resistance @ 20C | Inductance @ 20C | Length of Coil | Coil Weight |
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1
| BLDA-01 |
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1.5 lbs/amp
6.7 N/amp
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5.5 lbs
24.5 N
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16.5 lbs
73.5 N
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3.6 amps
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10.8 amps
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0.20 V/in/s
V/m/s
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3.8 ohms
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1 mH
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3.2 in
mm
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0.27 lbs
Kg
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2
| BLDA-02 |
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3.1 lbs/amp
N/amp
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10 lbs
44 N
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30 lbs
133 N
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3.1 amps
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9.3 amps
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0.4 V/in/s
V/m/s
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7.6 ohms
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2 mH
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5.6 in
mm
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0.6 lbs
Kg
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3
| BLDB-02 |
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4.9 lbs/amp
21.8 N/amp
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14 lbs
62.2 N
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38.7 lbs
172 N
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2.6 amps
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7.8 amps
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0.64 V/in/s
25.2 V/m/s
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11.8 ohms
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4.8 mH
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5.6 in
142.2 mm
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0.6 lbs
0.27 Kg
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4
| BLDB-03 |
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7.4 lbs/amp
32.7 N/amp
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19 lbs
84.5 N
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56.7 lbs
252 N
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2.6 amps
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7.8 amps
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0.96 V/in/s
37.8 V/m/s
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17.7 ohms
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7.2 mH
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8 in
203.2 mm
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0.86 lbs
0.39 Kg
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5
| BLDC-02 |
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6.1 lbs/amp
27.3 N/amp
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20 lbs
89 N
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60 lbs
267 N
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3.4 amps
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10.2 amps
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0.8 V/in/s
31.5 V/m/s
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8.6 ohms
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6 mH
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5.6 in
142.2 mm
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1.22 lbs
0.55 Kg
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6
| BLDC-03 |
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9.2 lbs/amp
40.9 N/amp
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30 lbs
134 N
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90 lbs
402 N
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23.3 amps
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9.9 amps
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1.2 V/in/s
47.2 V/m/s
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12.9 ohms
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9 mH
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8 in
203.2 mm
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1.75 lbs
0.79 Kg
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7
| BLDC-04 |
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12.3 lbs/amp
54.7 N/amp
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40 lbs
178 N
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120 lbs
534 N
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3.2 amps
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9.6 amps
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1.6 V/in/s
63 V/m/s
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17.2 ohms
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12 mH
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10.4 in
264.2 mm
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2.27 lbs
1.03 Kg
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8
| BLDC-05 |
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15.3 lbs/amp
68.1 N/amp
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50 lbs
222 N
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150 lbs
667 N
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3.2 amps
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9.6 amps
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2 V/in/s
78.7 V/m/s
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21.2 ohms
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15 mH
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12.8 in
325.1 mm
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2.8 lbs
1.27 Kg
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9
| BLDC-06 |
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18.4 lbs/amp
81.8 N/amp
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60 lbs
267 N
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180 lbs
800 N
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3.2 amps
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9.6 amps
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2.4 V/in/s
94.5 V/m/s
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25.8 ohms
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18 mH
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15.2 in
386.1 mm
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3.36 lbs
1.53 Kg
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10
| BLDD-03 |
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18.4 lbs/amp
81.8 N/amp
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75 lbs
333 N
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225 lbs
1000 N
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4.2 amps
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12.6 amps
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2.4 V/in/s
94.5 V/m/s
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12 ohms
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15 mH
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11.2 in
285 mm
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5 lbs
2.27 Kg
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11
| BLDD-04 |
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24.5 lbs/amp
109 N/amp
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100 lbs
444 N
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300 lbs
1334 N
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4.1 amps
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12.3 amps
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3.2 V/in/s
126 V/m/s
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16 ohms
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20 mH
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14.6 in
369 mm
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6.5 lbs
2.95 Kg
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12
| BLDD-05 |
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36.8 lbs/amp
163.7 N/amp
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150 lbs
667 N
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450 lbs
2000 N
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4.1 amps
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12.3 amps
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4.8 V/in/s
189 V/m/s
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24 ohms
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30 mH
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21.3 in
541 mm
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9.5 lbs
4.32 Kg
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13
| BLDD-06 |
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49.1 lbs/amp
218.4 N/amp
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200 lbs
888 N
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600 lbs
2669 N
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4 amps
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12 amps
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6.4 V/in/s
252 V/m/s
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32 ohms
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40 mH
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28 in
711 mm
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12.5 lbs
5.68 Kg
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F cont = Continuous Force, F peak = Peak Force @ 10% Duty
Kp = Force Constant, I c = Continuous Current, I p = Peak Current @ 10 % Duty
Required DC Bus Voltage for Amplifier; V required = (I peak x Rc x 1.4) +(Back EMF x Velocity)
Other winding resistances are available – contact factory for more information
