Tiny DC servomotor musters much torque
An
EMS product story
Edited by the Engineeringtalk editorial team
Dec 3, 2003
The new Minimotor 0620.B series of brushless DC servomotors features a diameter of only 6mm.
In addition to brush-commutated DC micromotors with precious-metal commutation, EMS now offers the new Minimotor 0620.B series of brushless DC servomotors, which features a diameter of only 6mm.
This new, electronically commutated DC servomotor has even better dynamic characteristics and effective output power than the brush-commutated DC micromotor.
With rotor inertia of only 0.0095gcm2, it achieves a continuous torque of 0.33mNm.
The companion drive electronics required for operating the motor allows the no-load speed to be as high as 50,500rev/min.
Despite its high performance, this type of motor has an especially long service life.
The speed is regulated by a BLD 2401two-quadrant PWM servo amplifier, which features outstanding linearity and excellent efficiency (90%).
The speed control can be preselected using jumpers.
Speed regulation and current limiting can be independently adjusted using two potentiometers.
Matching planetary gearheads are available in the 06/1 series.
With the same diameter of only 6mm, these gearheads feature all-metal construction and provide reduction ratios ranging from 4:1 to 4096:1.
Besides adapting the speed mechanically to suit specific applications, they allow the torque to be increased to as much as 35mNm.
Areas of application include precision medical instruments, optical instrumentation, security and inspection systems, micro-actuators, and any application where small size but high power and performance are needed.
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