MPH-02, MPB-02, MPD-02
Drive Control
6-11
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
The field-oriented closed-loop current control has the following general
features:
•
closed-loop control of the motor current according to the principle of
field orientation, i.e. separate closed-loop control of the torque-
generating current and the flux-generating current
•
compensation of the cross coupling of the d and q axes to increase
dynamics
•
voltage loop for operation in the field weakening range
•
activation of the optimum current loop proportional amplification value
depending on the current PWM frequency during the load defaults
procedure
In the case of synchronous motors, the field-oriented closed-loop current
control additionally has the following features:
•
limitation of the I
q
command value at the voltage limit for protection
against too little control margin
•
utilization of the reluctance effect to increase the available torque in
the basic speed range
•
support of synchronous motors with reluctance torque, i.e. motors with
significantly different inductances in the d and q axes
In the case of asynchronous motors, the field-oriented closed-loop current
control additionally has the following features:
•
optimum torque linearity, even in the field weakening range, by:
•
permanent correction of the torque constant and the slip factor by
means of the currently calculated rotor flux
•
rotor flux model taking temperature and saturation behavior of the
magnetizing inductance into account
•
improved dynamic behavior by:
•
voltage- and load-dependent flux feedforward
•
voltage loop for correcting the flux feedforward
•
flux loop for dynamically generating the rotor flux
•
possibility of reducing the magnetizing current for low-loss operation at
no load or in partial load range
Current loop setting:
•
S-0-0106, Current loop proportional gain 1
•
S-0-0107, Current loop integral action time 1
•
P-0-0001, Switching frequency of the power output stage
•
P-0-0045, Control word of current controller
Voltage loop setting:
•
P-0-0533, Voltage loop proportional gain
•
P-0-0534, Voltage loop integral action time
•
P-0-0535, Motor voltage at no load
•
P-0-0536, Maximum motor voltage
Rotor flux control for asynchronous motors:
•
P-0-0528, Flux control loop proportional gain
•
P-0-0529, Scaling of stall current limit
•
P-0-0530, Slip increase
•
P-0-0532, Premagnetization factor
General Features
Features of Synchronous Motor
Control
Features of Asynchronous Motor
Control
Pertinent Parameters
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
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426-5480
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