Page 19 - Industrial Technology EXTRA - 14th April

However, Portescap has
developed a new range of
brushless slotless motors
optimised for use in
power tools that go
a long way to
minimising the in the industrial power tool
traditional design compromise. mostly hand-held: leading to the battery
Brushless motors have inherent being drained more quickly and reducing user
advantages over brushed motors in power tool comfort and safety.
designs. Brushless motors are less susceptible to The latest development from Portescap represents
mechanical wear (no brush friction), can be operated a significant evolution of the brushless slotless motor,
at much higher speeds (shortening cycle time and specifically for industrial power tool applications. The
increasing productivity) and can sustain high peak new Ultra EC™ family of brushless slotless motors
current (no brushes) – for example during the employs a revolutionary and patented U coil
tightening phase of a fastening tool’s operation – technology. These miniature motors contain a winding
providing far greater life in the hand tool. that is parallel to the motor axis, unlike the skewed
In terms of power density, a brushless slotless arrangement of a conventional slotless motor,
motor is a better option than slotted, providing perpendicular magnetic forces are minimised,
superior ability to maintain speed under load. Further, reducing copper losses and enabling the motor to
while the slotted motor can develop more power.
handle higher temperatures Iron losses at high speed in slotless motors are
to allow for more torque already greatly reduced compared with slotted
generation, this is not of direct designs. With this new straight winding, Ultra EC
benefit to industrial power tool motors have a shorter rotor length which allows for a
applications. Heat is the enemy lower rotor inertia and further reduced iron losses.
This revolutionary new design optimises speed and
torque in a compact package for the most
challenging applications.
With these new products,
Portescap has gone a long way to
eliminating the compro-mises
design engineers have traditionally
faced in selecting motors for
industrial power tools. Fasteners,
grippers and cutting tools can all
benefit from this increased
performance, lower weight and
greater energy-efficiency.
www.portescap.com

April 2020 • INDUSTRIAL TECHNOLOGY EXTRA! • p19