Keba ServoOne User Manual

Conditions
To effectively reduce the voltage consumption, the ratio of stator inductance P471[0]
- MOT_Lsig multiplied by the rated current P457[0] - MOT_CNom to rotor flux P462
[0] - MOT_FluxNom must be sufficiently large. In contrast to field-weakening of
asynchronous motors, synchronous motors can also be operated in the field-
weakening range with full rated torque at the nominal value of the q-current. Power
beyond the rated power output can therefore be drawn from the machine in field-
weakening mode, even at rated current. This must be taken into consideration when
configuring the motor.
CNom*Lsig> Faktor *FluxNom
A value greater than 0.2 is recommended for Factor .
Voltage demand
Rotorflux * Maximumspeed(inrad/s) *
Numberofpole
pairs
* <
800V(400V
devices)
           
400V(230V
devices)
P462[0] *
P458
[0]
*
P328
[0]
* * P463[0] * <
800V(400V
devices)
           
400V(230V
devices)
CAUTION! Your system/motor may be damaged if put into operation in
an uncontrolled or inappropriate manner.
Improper conduct can cause damage to your system /
machine.
l Ifthespeedachievedbyfield-weakeningissohighthat
theinducedvoltageexceedstheovervoltagethreshold
ofthedevice(for400Vdevicesapproximately800V,
for230Vdevicesapproximately400V),thiswillresult
indestructionoftheServocontrollerifnoadditional
externalsafetymeasuresareapplied.
ID No.: 0842.26B.5-01Date: 09.2020
ServoOne- Device Help
149
7 Control
First of all, there are two variants for field weakening with synchronous motors,
variants 1 and 2. They can be selected via P435[0] - CON_FW_FWMode.
P 347
CON_FM_VRef
Available Uzk
vmot
soll
vmot_filt
P 345
P 346
vreg_isdref
sdrefmod
isdref [1/n]
Ti
d-current control
1
P 344
Tf
Vmot
udref
uqref
Voltage
Calculation
Kp
Tn
x
2
x
y
Voltage control
y
2
CON_FM_ImagSLim
P 341
0
i
q
ω
e
u
zk
+
characteristic isd=f(n)
i
P 0435
CON_FM_FWMode
off
2
1
calculated map
sdref_tab
i
+
0
√2 * P 340 CON_FM_Imag
Variant 2:
Variant 1:
0
Image 7.34: Structure of field-weakening of synchronous motors
Additional modes (corresponding to P 435[0] - CON_FW_FWMode in the figure at
positions 0, 1 and 2) with their feed forward control of the d current are coupled with
additional multiplexer settings here as an alternative.
The voltage control implementation is active in all modes!
This ensures by means of P 347 CON_FM_VRef that adequate voltage reserves are
available to maintain a functional speed control at higher speeds.

Keba ServoOne Specifications

General

Brand	Keba
Model	ServoOne
Category	Controller
Language	English