Introduction - Control Techniques Focus 3R User Manual

Introduction

This is the User's Guide for Focus 3R (Regenerative) series of DC Drives. The Focus 3 is
a 3rd generation product of the long-standing Focus series. The Focus 1 was introduced back
in 1980 and the Focus 2 later in 1982. The Focus 2 was retired when the Focus 3 was
introduced as it took advantage of many technological advances in power electronics. The
Focus 3 Regen is a single-phase, bi-directional analog drive for DC motors with power ranges
from ¼ to 5HP.
Your Focus 3R is a general purpose regenerative DC motor speed controller that is
powered from either 115Vac or 230Vac single phase power. A regenerative (four quadrant)
drive is one that can provide motoring and regenerating torque for acceleration and deceleration
to overcome rated loads.
provide the most economical solution.
the motors normal coasting rate and can stop overhauling load situations.
Both drives incorporate many features that are standard on high performance system
drives, such as dynamic stability and built-in signal follower adjustments. Focus 3 drives come
in two basic model variations- with and without enclosure
Chassis Model
The model without an enclosure is denoted as a chassis model.
The chassis model is intended for mounting within a User
supplied cabinet and where the User intends to provide remote
Start/Stop and Speed control signals.
Enclosed Model
The Enclosed version comes to you already in a NEMA 4/12
enclosure that would allow the User to mount the Focus on a wall
or machine surface. The Enclosed version has Start/Stop and the
Speed Control adjustment on the front cover for convenient
operation.
For a complete overview of the Focus 3 product
line and available options, visit our website at:
www.emersonct.com
Focus 3 Catalog Section
Page 4
There are a great many applications where regenerative drives
A regenerative drive can slow down a motor faster than
(5 Hp model shown)
or click the link below:
.