CONTREX CXB2040 - Manual (Page 10)

8900 Zachary Lane N., Maple Grove, MN 55369 U.S.A. 7
CHAPTER ONE: DESCRIPTION, FEATURES AND SPECIFICATIONS
1.1 DESCRIPTION:
This brushless amplifier system has been designed to offer you, our customer, a large degree of
flexibility and customization with a standard, in stock product. Each amplifier module consists of a
standard power output board with one of our three types of personality modules mounted on it. (To help
you understand the various brushless amplifier and motor system combinations and their respective
advantages and disadvantages, please refer to chapter two of this manual which describes the theory of
operation). Following is a brief description of these personality modules and their mode(s) of operation:
(1) SINE/RESOLVER MODE - In this mode of operation, a brushless motor with an integral
resolver is required. The personality module contains a resolver to digital converter which
provides the positional information to the amplifier that is required to commutate the motor.
This positional information is also used by the personality module to emulate a quadrature
encoder output. This personality module can be configured for the following two different types
of operation:
(a) VELOCITY MODE - In this mode of operation, the personality module generates a
tachometer signal which is used to close a velocity loop in the amplifier. Please see section 2.3,
2.5, 2.8 of this manual for more detailed information.
(b) CURRENT MODE - In this mode of operation, which is also commonly referred to as torque
mode, sine wave currents in the motor are produced that are directly proportional to the input
signal. Please see section 2.5, 2.7, 2.9 of this manual for more detailed information.
1.2 FEATURES:
1.2.1 Stand Alone One Axis Amplifier:
 Line operated AC power operation: Fused AC input for single or three phase input with
solid state zero-crossing switch which limits in-rush current protection at turn-on. No
power isolation transofrmer is required.
 Fused Regen clamp circuit (shunt regulator) with LED indicator and 50W internal load resistor bank
bleeds off excess DC Buss voltage when decelerating a large load inertia. Additional regen resistors
can be connected externally.
 Bridge rectifier(s) and filter capacitor.
 Cooling Fans.
CHAPTER 1: DESCRIPTION, FEATURES AND SPECIFICATIONS