EB-20X Installation & Service Manual |
Introduction
4
Kollmorgen | kdn.kollmorgen.com | September 2020
1 INTRODUCTION
This installation and service manual is a general document and is applicable to a typical amplifier
needed to properly control the EB-20X motor series. Since servo amplifiers drive motors of
varying sizes with different operating characteristics (voltage and current, internal resistance,
inductance, rotor inertia, etc.), these amplifiers must vary with the specific motor. Consult the
manufacturer of the amplifier to assure operation per the motor’s nameplate data.
The customer data (CD) and performance curve (PC) are specific documents and are applicable
only to individual motors. They contain such information as maximum operating speed, peak
current limits, and values that make the amplifier motor combinations compatible. Do not operate
the motor outside the parameters shown on the respective performance curves
Typical amplifiers are 3-phase sine wave, pulse-width modulated type. They are fully regenerative
four-quadrant bi-directional velocity loop amplifiers designed to be used with Kollmorgen's high-
performance permanent magnet brushless motors.
An unregulated 300 VDC bus, derived from full-wave rectification of a 3-phase 230 AC line by the
power supply unit, is used to power the motor amplifier.
Kollmorgen's brushless motors feature the latest in permanent magnet technology, utilizing high-
energy Samarium Cobalt and Neodymium Iron Boron alloys. These brushless motors consist of
permanent magnet rotors and 3-phase Y-stator windings. Brushless motors have no commutators
or associated brushes. These motors run as synchronous motors, meaning the rotor speed is the
same as the speed (frequency) of the rotating stator's magnetic field. A brushless resolver is used
as the feedback device and is mounted internally as part of the overall motor construction.
Benefits resulting from the typical amplifier and brushless motor construction are:
•
Lower rotor inertia permits higher acceleration rates.
•
The motor is thermally more efficient since all heat is generated in the stator windings, which
are in the outside shell.
•
Higher speed operation and high peak horsepower are achieved. There is no commutation
limit.
•
Smaller physical motor size for a given horsepower rating.
•
Higher reliability and less motor maintenance. There is no commutator or brushes.
•
Smooth output torque.
