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DC motors possess linear relationships that allow for very predictable operation. For instance, if enough voltage is applied across the terminals of a DC motor, the output shaft will spin at a rate proportional to that applied voltage. You can take the ratio of the applied voltage over the rated voltage and multiply that number by the no load speed and get the running speed.
In the process of applying industrial drive products, we occasionally are misled into believing that we are applying horsepower. The real driving force is not horsepower - it is torque. This paper is developed to impart a deeper understanding of torque, its relationship to horsepower, and the types of loads we most frequently encounter.
If there are two things
that are in tight supply in
the industry, it's time and
talent. Manufacturers are always
pressured to do more faster,
and the industry is producing
fewer experts to help them do it,
so the industry's had to get crafty
and find what time-cutting procedures
they can.
In today's highly competitive world,
the better someone understands the
advantages and benefits of direct drive
technology, then the more they will
have an advantage in machine building,
giving them an edge over their
competition.
Beginning with this initial installment , and with the gracious permission of ABB/Baldor Electric, we are
pleased to announce the beginning of a new series -- Baldor Basics: Motors. This is a collection of basicsdriven,
motor-intensive articles authored by former Baldor engineer Edward Cowern, PE, a respected
name by many in the electric motor industry. During his tenure at Baldor, Cowern - now enjoying his
retirement - was tasked with producing a number of motor- and basics-related tutorials, primarily in
response to a steady flow of customer questions regarding motors. Today's customers continue to ask
questions and seek answers to address their various motor-related issues. As with Cowern's original
introduction to the series, we hope you find these articles useful and would appreciate any comments or
thoughts you might have for future improvements, corrections or topics.
If you’re an electrical engineer
you know how an electric motor works; if
you aren’t, it can be extremely
confusing. Therefore, here’s the simplified explanation (or the “how
an electric motor works for dummies” version) of how a four-pole, three-phase
AC induction motor works in a car.