Compact linear electric motor (ironless, DC, synchronous)
max. 800 N H2W Technologies, Inc

The DC brush linear motor is ideal for long stroke, open or closed loop servo, linear motion applications. They can be used at speeds up to 100 in / sec [2.5 m / sec] and as low as 1 in/sec [25 mm / sec]. They are capable of very precise position, velocity and acceleration control when coupled with a linear encoder.

The motor is commutated using brushes on the moving permanent magnet secondary in conjunction with a stationary commutator bar on the coil assembly. This results in only the coils directly beneath the secondary with current flowing in them.

The short moving brush assembly is magnetically attracted to the long stationary laminated coil assembly. A customer supplied bearing system is required to guide the moving secondary and to maintain a .025" [0.63 mm]
gap between the secondary and the coil assembly.

The power to the motor (from a customer supplied PWM DC servo amplifier) is supplied to the moving secondary via a power cable. The resultant force is proportional to the input current.

The low overall height (1.65" [41.9 mm]) of the brush motor allows it to fit into a very compact space The low moving mass of the secondary allows for higher accelerations of light payloads.

The motor comes in different widths and secondary lengths to meet different force and packaging requirements.

Advantages:

- Low profile and small cross section
- Available in many different widths and lengths
- High Acceleration of light loads
- High Speed
- Uses low cost PWM amplifier