05.2003
Description
Siemens AG
6SE7087-6JP60
SIMOVERT MASTERDRIVES
Operating Instructions
2-1
2 Description
The converters are power electronics components for feeding three-
phase motors.
They can be operated from a three-phase system with a voltage
between 380 V and 480 V and a frequency of 50/60 Hz.
The line voltage from the system is rectified and fed into the DC link.
The power section enables a three-phase system with a variable output
frequency between 0 Hz and 500 Hz maximum to be generated from
the DC link direct voltage with the pulse width modulation method
(PWM).
The internal DC 24 V voltage is supplied through an integral power
supply unit.
The unit is controlled by the internal control electronics which consists
of a microprocessor system. The functions are provided by the unit
software.
Operator control is effected 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 has a number of interfaces and
two slots for the use of optional boards.
Pulse encoders can be used as motor-specific encoders.
Motor
connection
U2/T1
V2/T2
W2/T3
PE2
Control electronics
Serial
interface
Terminal strip
Optional
boards
DC link
U1/L1
V1/L2
W1/L3
PE1
PMU
Inverter
Precharging
Rectifier
Internal
power
supply
G
H
Braking
resistor
24 V
==
==
Brake chopper
C / L+
D / L -
PE3
-X9
external DC 24 V
supply
Fig. 2-1
Circuit principle of the frequency converter
Range of application
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182