NEW Brushless AS Series screwdrivers

KolverUSA Tech Articles and News

NEW Brushless AS Series screwdrivers

Posted By: Jim Chase on Jun 23, 2009

KolverUSA will be rolling out an entire line of NEW Screwdrivers with Brushless motors throughout Q3 & Q4 of 2009.

The first Brushless tools to be introduced are the AS Series of Clutchless "Current Control" DC-Electric Screwdrivers. The AS Series includes six (6) families of tools with unique Torque and RPM ranges; as follows:

AS Series of Brushless Screwdrivers:

Screwdriver Model	Torque (in/lbs)	Speed (RPM)	Controller Model
BRL07AS	0.6 to 9.0	660 - 1000	EDU1BR & SG
BRL10AS	0.44 to 8.8	430 - 650	EDU1BR & SG
BRL16AS	8.8 to 14	300 - 450	EDU1BR & SG
BRL27AS	2.7 to 23.8	800 - 1200	EDU2BR & SG
BRL35AS	4.4 to 30	530 - 800	EDU2BR & SG
BRL45AS	4.4 to 40	330 - 540	EDU2BR & SG

Why Brushless:

Wider Torque & RPM Range: Because Brushless motor commutation is accomplished electronically, brushless DC motors are capable of very high speeds and torque without arcing.
Higher Duty cycles: Brushless motors have a lower thermal resistance and are capable of operating in a wider temperature range.
Sophisticated motion control capabilities: The lack of brushes allows the BRL Series to have a broad closed-loop speed range. Also, brushless motors have a higher torque to inertia ratio, high starting energies, and high breakaway torques.
Small and lighter: Because they have lower thermal resistance, are capable of operating in wider temperature ranges, have higher torque to inertia ratios, and have greater acceleration, smaller brushless DC motors can do the same job that their much larger counterparts would otherwise be used for. This results in an overall cost reduction.
Cleaner & Safer: No brushes means a maintenance reduction and no brush residue contamination to bearings or the environment. There is no arcing associated with brushes, and therefore, are safer in explosive environments. Brushless DC motors are also safer in contact with fluids than brush DC motors.
Quieter: Because there is no brush arcing or brush commutation, brushless motors are much quieter both electrically and audibly.

The BRL series operates by setting a torque, speed, and ramp on a controller, then validating the resulting torque on a torque tester or rotary transducer. A BR series controller, purchased separately, is required for these tool to operate.