Description; Range Of Application; Circuit Principle Of The Frequency Converter - Siemens simovert masterdrives Operating Instructions Manual

09.2006
2

Description

Range of application

Optional
boards
U1/L1
V1/L2
W1/L3
C / L+
D / L -
PE1
Siemens AG 6SE7087-2JK50
SIMOVERT MASTERDRIVES
Converters are power electronics components that feed three-phase
motors.
The converters can be operated from a 50 Hz or 60 Hz three-phase
system with a voltage in the range of the values specified on the rating
plate.
The line voltage is rectified and fed to the DC link.
The power section generates a three-phase system with a variable
output frequency between 0 Hz and a maximum of 400 Hz from the DC
link voltage via pulse width modulation (PWM).
The internal 24 V DC voltage is supplied through an integral power
supply unit.
The unit is controlled by the internal closed-loop control electronics
consisting of a microprocessor system. The functions are provided by
the unit software.
Operator control is via the PMU operator control panel, the user-friendly
OP1S operator control panel, the terminal strip or via a bus system. For
this purpose, the unit is provided with a number of interfaces and 6
slots for the use of optional boards.
HTL incremental encoders (TTL with SBP optional board) and analog
tachometers can be used as encoders on the motor.
Terminal strip
Control electronics
Pre-charging
DC link
Rectifier
Fig. 2-1

Circuit principle of the frequency converter

Operating Instructions
PMU
Serial
interface
U2/T1
V2/T2
W2/T3
Inverter
PE2
Description
Motor
connec-
tion
2-1