Written by [google_authorship] on 28th February 2020
A gear motor is
a single component that integrates a gear reducer with an electric motor. Depending
on their design and purpose, such geared-motor units can produce high torque even
at low speeds or with low horsepower. They are able to achieve this because the
gearhead acts as a torque multiplier, meaning smaller geared motors generate
relatively high torque.
AC or DC Motors
be designed for use with either AC or DC motors, with each serving the same
purpose of converting electrical energy into mechanical energy even though they
are built and controlled differently. The biggest difference is their source of
power, with AC motors powered by an alternating current and DC motors powered
by a direct current (hence their abbreviated names).
units also come with a variety of gearing styles such as bevel, helical,
hypoid, spur or worm gears, with each having
their own advantages and disadvantages.
important ratings when identifying the ideal gear-motor for a particular
application are usually input horsepower, output speed and output torque.
Types of DC Motor
generally all have the same type of rotor, featuring windings that generate an
electromagnetic field when they receive an electrical current. The major
differences come in the form of the stator, which are made of permanent magnets or coil
DC motors are the simplest design and are thus less costly than wound DC
motors, though their construction style means their torque output will be
significantly limited compared to a wound DC motor. The magnets will also degrade
with use, making the longer lasting wound DC motor the more commonly used in
There are two
definitive types of wound DC motor designs that will be preferred for different
applications, with the difference being how the rotor and stator windings are
connected. The two types are Series Wound and Shunt (or Parallel) Wound, with a
third option being a Compound Wound DC motor that is a combination of the main
Series Wound DC Gear-Motors for High Torque
The Series Wound
DC geared-motor units feature the rotor and stator windings connected in sequence,
or a series, with the electrical current running through each of them equally. The
stator windings will have a thicker diameter and have fewer turns than those in
a Shunt gearboxes and geared-motors,
which makes the resistance of the windings lower compared to the Shunt type and
allows the Series Wound motor to extract large amounts of electrical current to
produce high torque.
Shunt Wound DC Gear-Motors for High Torque
In Shunt Wound
DC motors, the rotor and stator windings are connected parallel to each other,
hence the alternative name of Parallel Wound DC motor. This type of connection
splits the motor current in two with one going through the rotor and another
through the stator. With a smaller wire diameter and more turns compared to the
Series Wound windings, the Shunt stator has a very high resistance with the
initial drawn current relatively low.
If you require any
gearboxes and geared motors – then contact
who are the UK’s leading gear-motors and gearboxes suppliers.