8.16 Vpm Voltage Protection Module; General Information - Siemens 6SN1123-1AA00-0DA2 Configuration Manual

8 Important Circuit Information

8.16 VPM Voltage Protection Module

8.16 VPM Voltage Protection Module
8.16.1

General information

8-322
The Voltage Protection Module VPM (voltage limiting module) is used for per-
manent–magnet synchronous motors with an EMF of 800 Vrms up to 2000
Vrms in order to limit the DC link voltage at the converter in the case of a fault.
The Voltage Protection Module is connected between the power module and
motor in the motor cable. If, at maximum speed, the line voltage fails, or if as a
consequence of this, the converter pulses are deleted, the synchronous motor
feeds back the full voltage into the DC link.
The VPM identifies an excessively high DC link voltage (> 800 V) and short–cir-
cuits the three motor feeder cables. The energy remaining in the motor is con-
verted into heat as a result of the short–circuit between the VPM and the motor
feeder cables.
The Voltage Protection Module is available in 3 different versions.
Table 8-4 Overview of the Voltage Protection Modules that are available
Designation
VPM 120
VPM 200
VPM 200 Dynamik
When using third–party synchronous motors (generally, with higher inductances
then 1FE motors), when combining a third–party synchronous motor with a se-
ries reactor as well as the combination of 1FE motor with series reactor, then
the VPM 200 Dynamik should be used.
The reason for this is the higher operational inductances and as a consequen-
ce, higher voltage rates rise, which can effect of the VPM.
Table 8-5 Interface overview of the Voltage Protection Module
Type
Signal interface
PE connection
Load connection studs, input
Load connection studs, output
SIMODRIVE 611 Configuration Manual (PJU) – 02/2012 Edition
Rated current
120 A
200 A
200 A
Number of VPM Number of VPM 200
120/VPM 200
1
2
3
3
© Siemens AG 2012 All Rights Reserved
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