L100 Inverter
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Frequently Asked Questions
Q.
What is the main advantage in using an inverter to drive a motor, compared to
alternative solutions?
A.
An inverter can vary the motor speed with very little loss of efficiency, unlike
mechanical or hydraulic speed control solutions. The resulting energy
savings usually pays for the inverter in a relatively short time.
Q.
The term “inverter” is a little confusing, since we also use “drive” and “amplifier”
to describe the electronic unit that controls a motor. What does “inverter” mean?
A.
The terms
inverter
,
drive
, and
amplifier
are used somewhat interchangeably
in industry. Nowadays, the terms
drive
,
variable-frequency drive
,
variable-
speed drive
, and
inverter
are generally used to describe electronic, micropro-
cessor-based motor speed controllers. In the past,
variable-speed drive
also
referred to various mechanical means to vary speed.
Amplifier
is a term
almost exclusively used to describe drives for servo or stepper motors.
Q.
Although the L100 inverter is a variable speed drive, can I use it in a fixed-speed
application?
A.
Yes, sometimes an inverter can be used simply as a “soft-start” device,
providing controlled acceleration and deceleration to a fixed speed. Other
functions of the L100 may be useful in such applications, as well. However,
using a variable speed drive can benefit many types of industrial and
commercial motor applications, by providing controlled acceleration and
deceleration, high torque at low speeds, and energy savings over alternative
solutions.
Q.
Can I use an inverter and AC induction motor in a positioning application?
A.
That depends on the required precision, and the slowest speed the motor will
must turn and still deliver torque. If you set the torque boost, the L100 can
develop starting torque at 100% of its rating. However, DO NOT use an
inverter if you need the motor to stop and hold the load position without the
aid of a mechanical brake (use a servo or stepper motion control system).
Q.
Does the optional digital operator interface or the PC software (DOP Professional)
provide features beyond what is available from the keypad on the unit?
A.
Yes. However, note first that the same set of parameters and functions are
equally accessible from either the unit’s keypad or from remote devices. The
DOP Professional PC software lets you save or load inverter configurations
to or from a disk file. And, the hand-held digital operator provides hard-
wired terminals, a safety requirement for some installations.
