State-of-the-Art Stock & Custom Motor Speed Control Manufacturer
Offering Top Quality at Wholesale Prices
Motor Speed Control
Call TEMCo today for delivering
leading industry products that will supply your electrical needs and
help sustain your business functions, such as ordering a Motor
Control device for a new building or power expansion. Call us today at
510-490-2187.
Current State of Motor Speed Control
Motor Speed Control is done nowadays from
a variety of approaches. There have been significant advancement
in transformer technologies and in solid-state electronics. This
has opened the door for a whole selection of previously unavailable
avenues in Motor Speed Control.
Historic Approaches To Motor Speed Control
Before the early 1800's rheostats were used in
the armature circuit in combination with centrifugal governors to
automatically maintain (DC) motor speed under varying loads. They
functioned only to interrupt a circuit when a motor went too fast.
Several versions of this philosophy of Motor Speed Control were
suggested where current was only supplied a part of each revolution.
Some attempts were designed to move brushes from contact with armature
when speeds passed optimum; the governor mechanically moving them.
They all became obsolete with the introduction of new motor designs.
Brush shifting was limited in usefulness due to
narrow range of speed available. Armature rheostats allowed only
poor regulation. Changing field reluctance was experimented with
to little success. Shifting the balance of metal in a yoke,
changes in air gap, and attempts to use movable iron cores all failed
to prove practical. Focus went to variable voltage ideas.
Three Motor Speed Control versions tried were motor/generator
types, multiple supply voltages, and boost and retard systems.
By 1900 attention shifted to the increasing
development of AC motors. The Variac, first patented in 1934, is
one of the oldest successful of the AC electric versions of Motor
Speed Control still in use today.
Motor Speed Control / The Variac
The simplicity of the Variac Motor Speed
Control is unquestionably part of its success. It is
essentially a single coil autotransformer with a variable slider or
rheostat-like action that allows variable control. Its
capabilities are appreciated in testing and experimental activities.
It is also very efficient and compact and is a great form of control
panel transformer.
Motor Speed Control / The VFD
Here is where Motor Speed Control has come
into its own. Use of electronics in
VFD drives has produced the
opportunity to pretty much customize motor speeds and other attributes
of motor operation. Variations allow closely monitoring and
adjusting to make full use of torque. This is the
vector drive.
Motor Speed Control / The Control Transformer
Motor Speed Control is not always about
variability. Rather, it is often of great benefit to supply very
predictable and constant exact voltage. Where stresses inherent
in starting and stopping motors require special consideration and the
lowering of a higher voltage to a lower desired voltage is also
necessary, the control
transformer may be just the thing. There are several
variations and uses besides for motors, but all will be capable of
withstanding the high inrush currents resulting from powering up a
motor. They are built with the capacity to maintain a predictable
constant load voltage despite varying supply voltage. This allows
use of solenoids and other electromagnetic devices and switches
sensitive to voltage changes. They will also insure isolation of
primary power supply from secondary load for safety and damage
prevention.
TEMCo Provides For Its Clients
At TEMCo it is not enough to just sell a product.
We want to know our clients have every aspect of transaction covered.
We want to achieve full customer satisfaction with the result of
customers who are fully confident when dealing with us. The first
step in this is giving outstanding customer service. Offering
superlative products is next. Providing speedy delivery is third.
Following that is always making top notch product support available.
Naturally in sequence then would be a best-in-industry warranty.
Most would be pleased with that much. But here's the surprise.
We also maintain the most competitive prices available.
Highest Quality Motor Speed Controls
Call TEMCo with your specific
needs. TEMCos technical sales department has many years of
applications experience providing design and engineering assistance for
all types of Motor Speed Control installations.
Call Our Motor Speed Control Specialists Today!
*Custom Motor
Speed Control Voltage Combinations Available*
Contact our team at TEMCo
Transformer at
510-490-2187 to get your quote, place your order and arrange
for shipping.
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