Application and Operation
6.2 The Control Modes
Product User Manual
Operating Instructions, Version AE 12/2009, A5E01454341C
115
6.2.8 Torque Current Regulator
The Torque Current Regulator generates the motor’s Q-axis motor voltage. The Torque
Producing Motor Current Reference (Iqs_ref) is generated from the output of the Frequency
Regulator. The Torque Producing Current Feedback (Iqs) comes from Motor Current D-Q
converter. The Torque Current Regulator is evaluated at the inner current loop update rate.
This regulator is the innermost (i.e., fastest) control loop in the NXG Control operating at the
sampling rate of the system (typically 3 to 6 KHz).
6.2.9 Magnetizing Current Regulator
The Magnetizing Current Regulator generates the D-axis motor voltage reference. The
Magnetizing Motor Current Reference (Ids_ref) is generated from the output of the Flux
Regulator. The Magnetizing Producing Current Feedback (Ids) comes from Motor Current D-
Q converter. The Torque Current Regulator is evaluated at the inner current loop update
rate. This regulator is the innermost (i.e., fastest) control loop in the NXG Control operating
at the sampling rate of the system (typically 3 to 6 KHz).
6.2.10 Flux Regulator
The Flux Regulator generates the magnetizing motor current reference. The Flux Reference
(λds_ref) is generated from the control’s flux ramp. The Flux Feedback (λds) comes from
Motor Voltage D-Q converter. The Flux Regulator is evaluated at 1/5
th
of the inner current
loop update rate.
6.2.11 Phase Lock Loop
The Phase Lock Loop module generates the Flux Angle (θ) and Stator Frequency (ω
out
). The
Flux Q-axis term is generated by the motor voltage D-Q transformation (λ
qs
). The Phase
Lock Loop module is evaluated at 1/5
th
of the inner current loop update rate.
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