Rockwell Automation SB3000 AC Power Modules - Manual (Page 9)

Introduction 1-1
C
HAPTER
1
Introduction
The High Power SB3000 Power Modules are variable-voltage, limited-frequency, high
performance PWM power converters. They are designed to be used with Distributed
Power System (DPS) SA3000 and SA3100 PWM inverter drives and other high
performance PWM-type inverters that operate from a fixed voltage DC Bus input.
The SB3000 Power Modules operate as two- quadrant, fast-response, synchronous
rectifiers converting fixed-frequency AC power to regulated voltage DC power using
pulse-width-modulation (PWM) technology. They can operate in both the motoring and
regeneration modes in response to the load applied to the DC output. SB3000 Power
Modules are capable of full rating regeneration of power to the AC line and feature
adjustable power factor operation.
The SB3000 Power Modules operate in conjunction with a separately-mounted input
reactor and a separately-supplied power distribution cabinet, which provides AC
power protection, disconnect, and soft-charge functionality for the SB3000 Power
Modules. Refer to Appendixes C and D for more information on SB3000 theory of
operation and interlock sequencing.
The SB3000 Power Modules are available in three output power ratings: 445 amp,
890 amp, and 1335 amp when used at a 4 kHz carrier frequency. They have a range
of AC Input voltage ratings. Nominal DC bus voltage may range from 300 to 800 VDC.
Output current with a 2 kHz carrier frequency is 534A, 972A, and 1457A. A 4 kHz
carrier frequency is typically used to minimize the size of the AC line reactor. Four kHz
operation requires a derating of the AC input current and DC output load current when
compared with operation at 2 kHz.
The SB3000 Power Module output current ratings are 100% continuous with no
overload. They may be derated for lower current ratings with overload capability. See
table 1.1.
Table 1.1 – SB3000 Power Module Current Ratings 1
SB3000
Part Number
Continuous
AC Input Current
(460VAC)
Continuous
DC Output Current
(800VDC)
5 Minute
AC Input and DC Output
Overload
2
804300-S 445A (rms) 445A DC 534A (rms)
804300-T 890A (rms) 890A DC 972A (rms)
804300-V 1335A (rms) 1335A DC 1457A (rms)
1. At 460 VAC Input/800 VDC Output/4kHz Carrier Frequency. For use with SA3000 Power Modules operating at a 2 kHz carrier frequency.
2. With a 25% duty cycle