56 Rockwell Automation Publication 7000-UM202H-EN-P - November 2023
Chapter 2 Power Component Definition and Maintenance
PowerCage Module
Overview
A PowerCage™ module is a converter module, consisting of the following
elements:
• Epoxy resin housing
• Power semiconductors with gate driver circuit boards
• Heatsinks or heatpipes
•Clamp
• Snubber resistors
• Snubber capacitors
• Sharing resistors (not applicable for 2400V models)
Each drive consists of three PowerCage rectifier modules and three
PowerCage inverter modules. There are two principal classes of rectifiers:
• AFE and 18-pulse
- AFE type rectifiers use SGCTs
- 18-pulse rectifiers use SCRs
All inverter modules use SGCTs as semiconductors.
The size of the PowerCage module depends on the system voltage, and the
components will also vary in the system current.
This table illustrates power semiconductor usage in the converter section.
Some drive configurations contain self-powered SGCT power supply (SPS)
boards. These boards are applicable on all “A” frame drives and all AFE ‘B’
frame drives with heatsinks. See Self-powered SGCT Power Supply - SPS
on
page 99 for more information
Configuration Rectifier SGCTs Rectifier SCRs Inverter SGCTs
2400V, AFE 6 0 6
2400V, 18-pulse 0 18 6
3300/4160V, AFE 12 0 12
3300/4160V, 18-pulse 0 18 12
6600V, AFE 18 0 18
6600V, 18-pulse 0 18 18
ATTENTION: To prevent electrical shock, disconnect the main power before
working on the drive. Verify that all circuits are voltage-free, using a hot
stick or appropriate voltage-measuring device. Failure to do so may result in
injury or death.
ATTENTION: The PowerCage module can house either SCRs or SGCTs. The
SGCT circuit board is sensitive to static charges. Never handle these boards
without proper grounding.
ATTENTION: Some circuit boards can be destroyed by static charges. Use of
damaged circuit boards may also damage related components. Use a
grounding wrist strap when handling sensitive circuit boards.
ATTENTION: If equipped, the SPS circuit board is sensitive to static charges.
Do not handle these boards without proper grounding.
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