Efficient Networks Siemens Sinamics S120 User Manual

Page 150

Vector control

4.15 Instructions for commissioning permanent-magnet synchronous motors

Drive Functions

150

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

Table 4-7

Equivalent circuit diagram for motor data

Parameter

Description

Remark

p0350

Motor stator resistance, cold

p0356

Motor stator inductance

p0357

Motor stator inductance, d axis

WARNING

As soon as the motor starts to rotate, a voltage is generated. When work is carried out on

the converter, the motor must be safely disconnected. If this is not possible, the motor must

be locked by a holding brake, for example.

Features

● Field weakening up to approx. 1.2 * rated speed (this depends on the drive converter

supply voltage and the motor data, also refer to limitations/ constraints)

● Flying restart (for operation without encoder, only possible with additional VSM)
● Vector closed-loop speed and torque control
● Vector V/f control for diagnostics
● Motor identification
● Automatic rotating encoder adjustment (the zero encoder position is calibrated)
● Speed controller optimization (rotating measurement)
● Thermal protection via temperature sensor (PTC/KTY)
● All encoders that can be connected to an SMC10, SMC20 or SMC30 are supported.
● Operation with or without encoder is possible.

Supplementary conditions

● Maximum speed or maximum torque depend on the converter output voltage available

and the back EMF of the motor (calculation specifications: EMF must not exceed U

rated

converter).

● Calculating the maximum speed:

0RWQRP

'&OLP

QRP

PD[

QRP

'&OLP

PLQ

PD[

'&OLP

9GHYLFHV9
9GHYLFHV9
9GHYLFHV9

ຘ

Calculating k

see "Commissioning".