Closed Loop Vector Control (Clvc Or Csmc); Permanent Magnet Motor Control (Pmm) - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

NXGPro+ Control Description
4.7 Control Modes
4.7.8

Closed Loop Vector Control (CLVC or CSMC)

Closed loop vector control (CLVC or CSMC) is used for more precise speed control and for higher
torque at lower speeds. In applications where stable, low speed operation (below 1 Hz) under
high torque conditions is required, an encoder may be used to provide speed feedback. Encoder
speed feedback is directly used as an input to the speed regulator.
When an encoder is used with the drive, the control loop type is required to be set to CLVC for
closed loop vector control with an induction motor, or to CSMC for closed loop vector control
with a synchronous motor. Enable spinning load when using this control mode.
4.7.9

Permanent Magnet Motor Control (PMM)

Permanent magnet motor (PMM) control is used for permanent magnet motors, as these motors
have special starting requirements. Magnets in the PMM provide flux. The drive does not have
to generate I
Although PMMs are considered synchronous motors, PMM control features differ from the
synchronous motor control types. One such difference is that PMM control automatically
enables high starting torque mode.
Note
There is no encoder capability for use with PMM control mode. Do not use the CSMC for PMM
control to include an encoder, as this will not function correctly.
With PMM control, the flux regulator output is disabled. Instead, I
Reactive Current mode (2981) selection. PF, as shown in the vector diagrams, is measured from
the drive output terminals, not from the motor reference.
The following figure shows the control with the flux regulator disabled.
Figure 4-6
The possible selections for Reactive Current mode are as follows.
Note
Since the Auto and Auto Phase Advance modes increase the output power and voltage to the
motor, these modes must be disabled if attempting synchronous transfer of the PMM. The
Manual modes may also prevent proper operation of synchronous transfer.
54
to maintain flux. Output power factor (PF) control is possible.
ds
Flux Regulator for PMM Control Mode
is calculated based on the
ds,ref
NXGPro+ Control Manual
Operating Manual, A5E50491925A