Installation Manual

Startup
9000X AF Drives MN04001004E—May 2011 www.eaton.com 47
Startup
Safety Precautions
Before startup, observe the warnings and safety instructions provided throughout this manual.
WARNING
Internal components and circuit boards (except
the isolated I/O terminals) are at utility potential
when the SVX9000/SPX9000 is connected to the
line. This voltage is extremely dangerous and may
cause death or severe injury if you come in contact
with it.
When the SVX9000/SPX9000 is connected to the
utility, the motor connections U (T1), V (T2), W
(T3) and DC bus/brake resistor connections B–, B+,
and R– are live even if the motor is not running.
Do not make any connections when the AF drive is
connected to the utility line.
Do not open the cover of the AF drive immediately
after disconnecting power to the unit, because
components within the drive remain at a
dangerous voltage potential for some time. Wait
at least five minutes after the cooling fan has
stopped and the keypad or cover indicators are
dark before opening the SVX9000/SPX9000 cover.
The control I/O terminals are isolated from the
utility potential, but relay outputs and other I/Os
may have dangerous external voltages connected
even if power is disconnected from the SVX9000/
SPX9000.
Before connecting to the utility, make sure that
the cover of the drive is closed.
Overview
The SVX9000/SPX9000 control can be used to operate
induction motors using the applications included in the
system software delivered with the drive. Higher
performance permanent magnet (PM) synchronous motors
and other functions of the frequency converter (FC) are
accomplished by loading special applications with the
9000XLoad software tool. The following sections describe
how to commission the drive for motor control in all
applications. See the All-in-One or special application manual
for additional startup information or details on the parameters.
Parameters are available (visible) based on the application
selected, the type of control (SVX or SPX), the option boards
installed in the control and the version of the system software
loaded in the control. In general, the SVX controls are limited
to V/Hz and open loop speed control of induction motors
while the SPX control will work with any application, and
option board. Before starting the commissioning process,
select the type of control, option boards, and the size of the
drive to meet the needs of the application, and check that the
latest system software is loaded. Open loop or sensorless
control means that motor control is accomplished by the
standard drive unit without added speed/position feedback
devices and associated option cards. Vector control means
that the drive can differentiate between torque producing and
magnetizing current when reading motor phase currents. The
"rotor flux oriented, current vector control" allows the AC drive
to control an induction motor in the same manner as a
separately excited DC motor.
Open Loop Vector Control Operations
The SVX9000/SPX9000 control normally operates an
induction motor in V/Hz or open loop vector control (speed
control) mode. By default, the ID run is designed to
automatically configure parameters for the programmable
volts per hertz (V/f) curve and make a stator resistance
measurement for a standard induction motor. If the ID run
does not give the proper performance, manual tuning of the
control is required and described in later sections.
Frequency Controlled Application
For pumps and fans, the application is usually frequency
controlled and there is no need for high torque on low speed.
A straight V/f curve (“linear” V/Hz ratio type) is all that is
required for proper operation. Because pumps and fans are
variable torque, selecting “Squared” for V/Hz ratio type will
give some energy savings. Compensation for measured
stator resistance voltage drop will improve performance, and
selecting “Auto Torque Boost” will help start the motor if
necessary. The SLX/SVX controls will operate a PM motor
open loop, but manual tuning of the V/f curve is required.
Speed Controlled Application
When an application is speed controlled and high torque at
low speed is needed, it is often necessary to complete the ID
run; select auto torque boost to help start the motor, and set
the drive to speed control mode to compensate for the slip of
the induction motor.
Closed Loop Vector Control Operations
Closed loop vector mode provides the best performance for
speed and torque control; especially in low speed, high
torque applications, including full torque at zero speed. The
SPX is required for closed loop control with a speed or
position feedback device. The closed loop ID run is similar to
the open loop mode ID run.
PM Motor Control Operations
The SPX control can be used to control a synchronous PM
motor open loop, or closed loop with a resolver or absolute
encoder. Best low speed, high torque performance is
achieved with a position feedback device. The high
performance multi-purpose application has a selection for
PM motor control. The PM motor Encoder ID run determines
the zero position of the rotor and stores it to a parameter for
use when the load is connected.
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