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08.96
1
Description
SIMOVERT MASTER DRIVES are power electronic units. They are available as
♦ Compact units
♦ Chassis units
♦ Cabinet units
There are three versions depending on the particular application
♦ Frequency control
♦ Vector control
♦ Servo Control
1.1
Applications
Drive converter with DC current input
DC drive converters generate a variable-frequency three-phase system at the motor side from a DC supply. This
variable-frequency three-phase system is used to continuously control the speed of three-phase motors.:
SIMOVERT MASTER DRIVES can be used with a common DC link, as well as for single-motor and multi-motor
drives.
Technological functions and expansions can be realized via defined interfaces in the open-loop control section.
1.2
Mode of operation
Converters with DC current input are suitable for coupling several converters to a common DC link bus. This
permits energy transfer between drives in the motoring and generating modes which in turn means energy
savings.
The DC converter must be connected to the DC bus through an E unit (rectifier unit) due to the pre-charging of
the DC link capacitors. If an I/R unit (rectifier and regenerative feedback unit) is used instead of the E unit, power
is fed back into the supply if the regenerative output for several drives is greater than the motor power required.
The converter is ready for operation after the DC link capacitors have been pre-charged.
The inverter, configured using IGBT modules, generates a three-phase system from the DC link voltage to feed
the motor.
Siemens AG
6SE7087-6BM70
SIMOVERT MASTER DRIVES
with three-phase- or DC current input
Output range:
2.2 kW to 37 kW
with three-phase- or DC current input
Output range: 45 kW to 200 kW
with three-phase- or DC current input
Output range: 250 kW to 1500 kW
FC
simple applications (e.g. pumps and fans)
VC
high demands regarding dynamic performance and accuracy
SC
servo drives
Operating Instructions
Description
1-1
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