Permanent-Magnet Synchronous Motor With Field-Weakening (Pe Spindle); Description - Siemens SIMODRIVE 611 universal Function Manual

01.99
4.8 Permanent–magnet synchronous motor with field–weakening (PE spindle)
4.8 Permanent–magnet synchronous motor with field–weak-
ening (PE spindle)
4.8.1

Description

What is a The permanent–magnet synchronous motors with field weakening
permanent– (1FE1 motor series) are liquid–cooled synchronous motors, which are
magnet supplied as components. After the components have been assembled
synchronous on the spindle, a complete motor spindle unit is formed.
motor
The rotors of 1FE1 motors are equipped with permanent magnets. The
with field
high speeds for spindle operation are achieved by a current which op-
weakening?
poses the field. This is similar to field weakening for induction motors.
Advantages The advantages of permanent–magnet spindles in comparison to in-
duction motors are:
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Reader's note
Detailed information on 1FE1 motors, configuring and mounting
built–in motors are provided in:
Reference:
E Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
Extremely low power loss in the rotor
––> low bearing temperature
Higher torque for the same active part dimensions
––> more compact machine design
Shorter accelerating times with the same moment of inertia
Improved efficiency
Favorable Cos ϕ
––> it may be possible to use a smaller power module
More favorable speed/power characteristic
––> no power reduction in the upper speed range
/PJFE/ AC Motors for Main Spindle Drives
Synchronous Build–in Motors 1FE1
Planning/Mounting Guide
Manufacturers Documentation
4 Commissioning
4-153
4