Brushless DC motors: fast, smooth and very cool

The new Portescap 22mm brushless DC motors available from Trident Engineering are capable of running speeds of up to 60,000 rev/min and produce minimal heat even when generating maximum torque. This makes them a perfect choice for use in dental drills, surgical tools, medical respirators, gas analysers, bar code scanners and similar demanding high-speed applications. Designated 22 BS, 22 BM and 22 BL, these new motors are available with body lengths of 38mm, 48mm and 58mm and develop a typical maximum torque of 9mNm, 15mNm and 23mNm respectively.

They can be supplied with a range of windings to suit operating voltages from 5V to 30V.

All models feature a pre-lubricated precision ball bearing system that, together with the brushless construction, ensures maximum reliability and an operating life in excess of 10,000 hours - equivalent to well over a year of continuous running.

Equally suitable for use in variable and fixed-speed applications, these new 22mm motors combine low inertia with high peak torque that provides fast acceleration combined with excellent speed control characteristics.

All versions can be supplied with hall-effect sensors to facilitate their use in applications where accurate positional control is required.

Trident Engineering also supplies a comprehensive range of spur and planetary gearboxes with standard ratios from 4:1 up to 4,000:1 to fit the 22mm motors.