Summary Of The Control Modes; Symbols Used In Figure Vector Control Algorithms - Siemens SINAMICS PERFECT HARMONY GH180 Function Manual

Table 4-1
Symbol
FluxDS
r
I
ds
I
qs
V
ds,ref
V
qs,ref
ω
s
θ
s
I , I
a b
Motor torque in newton-meters and shaft power can be calculated as:
Torque (Nm)
Shaft Power (W) = Torque (Nm) * Speed (rad/s) = Torque (Nm) * Speed (rpm) / 9.55
Rated Speed
Vector Control Modes
The control provides several control modes. The modes are described in the sections that follow.
4.7.3

Summary of the Control Modes

Summary of the Control Modes
Control Mode
Open loop vector con‐
trol mode (OLVC)
Open loop test mode
(OLTM)
Synchronous motor
control mode (SMC)
NXGPro+ Control Manual
Operating Manual, A5E50491925A

Symbols used in Figure Vector Control Algorithms

Description
D-component of motor flux as referenced to the stator; also equal to the motor flux, since Q-
component is zero. Motor Flux is defined as: Motor_Voltage / Stator_Frequency (rad/s). Flux
(which has units of Volt-seconds) is also proportional (but not equal) to Volts-per-Hertz ratio.
For an induction motor: Motor_Speed = Stator_Frequency / Pole_Pairs – Slip_Speed
This is the rotor (mechanical) frequency, which is equivalent to the motor speed.
For a synchronous motor: Motor _Speed = Stator_Frequency / Pole_Pairs
Magnetizing component of motor current.
Torque producing component of motor current.
Output of magnetizing current regulator used in the inverse D-Q transformation to produce
3-phase voltages.
Output of torque current regulator used in the inverse D-Q transformation to produce 3-phase
voltages.
Stator frequency or output frequency of the drive. This is motorspeed (r) + Slip.
Flux angle. This is the instantaneous position of the rotating flux vector.
, I Motor phase currents.
c
= 3 * Pole_Pairs * Flux (V-secs) * Iqs (A)
≈ 3 * Pole_Pairs * Motor_Voltage (V) * Iqs (A) / (2 π * Frequency (Hz))
= 120 * rated frequency / number of pole pairs
Vector Control Type of Motor
Vector control Induction
N/a Not for motor control
Vector control Synchronous
NXGPro+ Control Description
Encoder Features
Without encoder •
•
N/a Fast bypass and spin‐
ning load are disabled.
Without encoder
•
•
4.7 Control Modes
Fast bypass option
Spinning load op‐
tion
Fast bypass option
Spinning load op‐
tion
49