Clarify The Drive Type - Siemens SIMOTICS T-1FW3 Configuration Manual

5.2.1

Clarify the drive type

The motor is selected based on the required torque, which is defined by the application.
Typical applications are, for example:
● Traversing drives
● Hoisting drives
● Test stands
● Centrifuges
● Paper and rolling mill drives
● Feed drives
● Main spindle drives
Gear units to convert motion or to adapt the motor speed and motor torque to the load
conditions must also be considered.
As well as the load torque, which is determined by the application, the following mechanical
data are among those required to calculate the torque to be provided by the motor:
● Masses moved
● Leadscrew pitch, gear ratios
● Frictional resistance
● Mechanical efficiency
● Traversing paths
● Maximum velocity
● Maximum acceleration and maximum deceleration
● Cycle time
You must decide whether synchronous or induction motors are to be used.
Synchronous motors are the best choice if it is important to have low envelope dimensions,
low rotor moment of inertia and therefore maximum dynamic response. These motors are
operated in control type "servo". For additional applications, the 1FW3 can also be operated
in the "Vector" control mode.
The following factors must be taken into account when engineering the drive system:
● The line system configuration, when using specific types of motor and/or line filters on IT
systems (non-grounded systems)
● The ambient temperatures and the installation altitude of the motors and drive
components.
The motor-specific limiting characteristics provide the basis for defining the motors. These
define the torque or power characteristic versus the speed and take into account the motor
limits based on the DC-link voltage of the Power or Motor Module.
The DC-link voltage, in turn, is dependent on the supply voltage and, with multi-motor drives,
on the type of the Line Module.
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
Configuration
5.2 Configuring workflow
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