Simply stated, a current carrying conductor placed in a magnetic field will have a force exerted upon it. This force is proportional to the direction and magnitude of the current and the flux density field. Since the permanent magnet flux density field is fixed, the direction of the linear displacement depends on the polarity of input current. The amount of force that is produced is directly proportional to the magnitude of the input current.
Our voice coil actuators are available in both standard as well as custom sizes. You can choose from either the moving magnet (NCM type) or moving coil type (NCC Type):
It should be noted that for both types of actuators, longer strokes are available but the efficiency or motor constant (Km) decreases as the stroke increases. This is due to the fact that the motor constant is inversely proportional to the stroke. If higher efficiency is desired for longer stroke actuators, the coil assembly can be wound as a multiphase coil and then it will have to be commutated.
Typical specifications for a non-commutated actuator are short stroke (0-3in or 0-75mm), accelerations of up to 20 times the acceleration due to gravity, continuous forces up to 100 lbs (0-100 lbs or 0-450N), peak forces up to 300 lbs (0-300 lbs or 0-1350N), and with the addition of a linear encoder or LVDT linear position resolutions down to 0.1 microns are acheivable.
Because of the very low inductance of the actuator, a DC linear servo amplifier is required to provide power to the Voice Coil. A programmable motion controller is required to close the position loop on the system.
The NC Actuators should not be mounted in an environment that is wet or excessively dirty or in an environment with ambient temperatures (>50ºC).
Mounting holes are provided on the housing, shaft and / or coil assemblies for mounting the actuator to customer supplied base and payload
No maintenance is required.
(i.e. NCC05-15-020-2X is a moving coil actuator with 0.5" stroke, 1.5" OD, 2.0 lbs of continuous force, 2 pole magnet assembly and no special options)
LMNC Moving Coil Type
Bi–directional DC linear motor consisting of a moving wound bobbin assembly and a stationary magnet assembly. (Refer to catalog BR1800 for motor specifications, if your motor is custom; refer to documentation included with shipment or contact Baldor).
Plated steel magnet housing assembly, nylon or like material wound bobbin assembly. Your motor may or may not be supplied with a mounting flange or other mounting provisions refer to catalog BR1800 for standard motor specifications or refer to documentation included with shipment for custom motors.
Bearings are not provided with standard models. It is the purchaser’s responsibility to supply bearings on standard models. With the magnet assembly secured, the bearing must support the bobbin assembly so that it is mechanically centered in the magnet assembly. Failure to center the coil assembly may lead to mechanical contact between the coil and magnet assembly. If this occurs, motor electrical shorts are possible. If your motor is supplied with bearings, refer to documentation included with shipment for additional information. If this additional information is not available, contact your local Baldor representative for assistance.
Motor should be kept dry and relatively free of contamination. This motor is NOT WATER PROOF. Avoid submersion. Contact your local Baldor representative for service information. Avoid contact with petroleum– based solvents. Alcohol can be used to remove contaminants.
Refer to catalog or outline drawing supplied with motor for mechanical dimensions and electrical specifications.
Refer to catalog or outline drawing supplied with motor for mounting details and hole dimensions. If you motor is supplied with drilled and tapped mounting holes, refer to the recommended seating torque for screws in this document. It is recommended that a thread locking compound be used with mounting screws. Motor wires must be strain relieved.
For voltage and current specifications, refer to Catalog BR1800 for catalog motors or to documentation enclosed for custom motors. Your motor is supplied with 24 inch flying leads*.
These wires can be cut to remove excess length if required. Connectors are available; contact a Baldor representative for more information.
|Thermal Switch(optional)||Orange and Blue pair|