Permanent-Magnet Synchronous Motors - Siemens SINAMICS G150 Operating Instructions Manual

These cyclical values therefore limit the torque setpoint at the speed controller output/torque
input or indicate the instantaneous max. possible torque. If the torque setpoint is limited, then
this is displayed using parameter p1407.
• r1407.8
• r1407.9
Function diagram
FP 6060
FP 6630
FP 6640
7.4.6

Permanent-magnet synchronous motors

Description
Permanent-magnet synchronous motors without encoders are supported during operations
without encoders.
Typical applications include direct drives with torque motors which are characterized by high
torque at low speeds, e.g. Siemens complete torque motors of the 1FW3 series. When these
drives are used, gear units and mechanical parts subject to wear can be dispensed with if
the application allows this.
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 of up to approx. 1.2 x rated speed (depending on the supply voltage of
● Capture (only when using a VSM module to record the motor speed and phase angle
● Speed and torque control vector
● U/f control for diagnostics vector
● Motor identification
● Speed controller optimization (rotary measurement)
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
Upper torque limit active
Lower torque limit active
Torque setpoint
Upper/lower torque limit
Current/power/torque limits
WARNING
the converter and motor data, also see supplementary conditions)
(option K51))
Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
409