High performance, low cost motor solution

Citation

(1998), "High performance, low cost motor solution", Assembly Automation, Vol. 18 No. 4. https://doi.org/10.1108/aa.1998.03318dad.005

High performance, low cost motor solution

High performance, low cost motor solution

Keyword Motors

Small motor specialists Electro Mechanical Systems have launched a new motor which offers impressive torque and speed performance at low cost, the latest in the Minimotor R series of ironless rotor DC motors. The 2224R is initially available in three nominal voltages from 6 to 24 volts. With a unit size of just 22mm × 24mm, the unit offers up to 4.6 watts, delivering up to 21.3mNm and 8,200rpm (see Plate 5).

At the heart of the unit is the neodymium ferrite boron (NeFeB) magnet. Owing to the cost-effectiveness of this rare earth magnet, and the increased use of automation in manufacturing, the 2224R Minimotor is able to offer impressive performance with just a small increase in cost over the aluminium nickel cobalt (AINiCO) equivalent.

Plate 5 The 2224R is the latest in the Minimotor R Series of ironless rotor DC motors from Electro Mechanical Systems

The motor is already available with a range of various gearheads offering a maximum torque output capability (in intermittent operation) of 1,000mNm. There is also a range of magnetic encoders available, which can be built into the rear of the unit, offering line counts from 16-512. These integral encoders add just 0.8mm to the length of the motor and offer the possibility of accurate speed and position control.

An in-built capacitor ring is offered as an option on low voltage windings and as standard on higher voltage windings. This ring is built into the commutator and rotor assembly and reduces sparking on commutation. This doubles the life of the motor due to the reduction in electro-erosion and greatly reduces RFI, which assists design engineers in gaining EMC compliance for the designs.

Due to the high power-to-volume ratio of this motor, it is ideal for portable applications run from batteries, where weight, size and efficiency are all critical. Such applications will cover powered respirators, gas detectors, medical pumps, CCTV camera controls and portable vision systems, such as see-through smoke or fog cameras.

For further information contact: Jeff Mead, Electro Mechanical Systems Limited, Eros House, Calleva Industrial Park, Aldermaston, Reading RG7 4QW, UK. Tel: +44 (0) 1189 817391;Fax: +44 (0) 1189 817613.