American Magnetics 4Q06125PS-430 Integrated Power Supply System - Manual (Page 21)

Rev. 5 3
Introduction
General Description
1.1.8 Model 4Q06125PS-430 General Description
A Model 430 Power Supply Programmer and Model 4Q06125PS Power
Supply are configured to make up the system designated as 4Q06125PS-
430. The Model 4Q06125PS is a 750 Watt, ±6 Volt, ±125 ampere, 4-
quadrant, voltage and current stabilized DC supply. The power supply is
remotely controlled by the Model 430 Power Supply Programmer.
The Model 4Q06125PS-430 is a true 4-quadrant voltage and current power
supply capable of both sourcing and sinking 1 power smoothly through zero
to provide true ±voltage and ±current. It is ideal for controlling inductive
loads such as large magnets or motors.
The power supply is controlled by a ±10 Vdc remote analog signal supplied
by the Model 430 Programmer and applied to the power supply analog
input. Programming and control of the current loop (composed of the
magnet, power supply, and Model 430 Programmer shunt), is provided by
a Model 430 ramp-generated current reference with parameters as set by
the user in the Model 430. The Model 430 compares the measured current
(via the shunt) with the current reference to provide precise closed-loop
control of the actual current.
The power supply is operated in voltage-voltage
2
programming mode, with
the Model 430 Programmer output scaled to operate the power supply over
its available voltage output range. The Programmer signal will continually
adjust the power supply output voltage to automatically regulate the
power supply current; precise linear power supply current control will
result as long as the system voltage and current demand do not exceed the
power supply rating or load limiting parameters.
1. The power supply is operating as a source if the current direction and voltage polar-
ity are the same (i.e., the situation that would exist when supplying a resistive load).
If the voltage polarity and current direction are opposite, the supply is operating as
a sink and energy is being absorbed or returned to the “ac-line”.
2. Voltage reference controlling voltage output.