Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 365)

Component Definition and Maintenance 6-21
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
Converter Cabinet
The converter cabinet contains three rectifier modules and three
inverter modules. Figure 6.15 shows a 4160-volt converter with a
Pulse Width Modulation Rectifier (PWMR).
Isolated Gate Driver Power Supplies (IGDPS) are mounted on the
cabinet‟s right side sheet.
Cooling pipes are throughout the cabinet and are connected to each
chill block. Unlike the air-cooled drive, thermal sensors are not
installed on the chill block. The thermal sensor is located in the
pump cabinet.
PowerCage™
A PowerCage is a Rockwell Automation patented converter module,
consisting of the following elements:
• Epoxy resin housing
• Power semi-conductors with gate driver circuit boards
• Chill blocks
• Clamp
• Snubber resistors
• Snubber capacitors
• Sharing resistors
• Piping for coolant to flow to each chill block
All drives have six PowerCages, three rectifiers and three inverter
modules. The liquid-cooled drive has two types of rectifiers – the
18-pulse SCR and the PWM rectifier.
All inverter modules use SGCTs as semi-conductors.
The size of the PowerCage will vary depending on the system voltage,
and the components will also vary depending on the system current.
All PWMR modules use SGCTs as semi-conductors.
The power semi-conductor usage in the converter section is as
follows:
Configuration
Inverter
SGCTs
Rectifier
SGCTs
Rectifier
SCRs
3300/4160V PWM rectifier 12 12 0
3300/4160V, 18P 12 0 18
6600V, 18P 18 0 18
6600V, PWM rectifier 18 18 0