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P219 auto. magn. adjustment, P2xx control/characteristic curve parameters – NORD Drivesystems BU0500 User Manual

Page 86

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SK 500E – Users Manual for Frequency Inverters

86

BU 0500 GB-1013

P219

Auto. magn. adjustment

(Automatic magnetisation adjustment)

S

25 ... 100 % / 101

{ 100 }

SW 1.6 and above

With this parameter, an automatic adjustment of the magnetizing to the motor load can be made.
P219 is a limiting value, to which the field in the motor can be reduced.

As standard, the value is set to 100%, and therefore no reduction is possible. As minimum, 25%
can be set.

The reduction of the field is performed with a time constant of approx. 7.5 sec. On increase of load
the field is built up again with a time constant of approx. 300 ms. The reduction of the field is carried
out so that the magnetisation current and the torque current are approximately equal, so that the
motor is operated with “optimum efficiency”. An increase of the field above the setpoint value is not
intended.

This function is intended for applications in which the required torque only changes slowly (e.g.
pumps and fans). Its effect therefore replaces a quadratic curve, as it adapts the voltage to the
load.

NOTE:

This must not be used for lifting or applications where a more rapid build-up of the

torque is required, as otherwise there would be overcurrent switch-offs or inversion of
the motor on sudden changes of load, because the missing field would have be
compensated by a disproportionate torque current.

101 = automatic, with the setting P219=101 an automatic magnetisation current controller is

activated. The ISD controller then operates with a subordinate magnetizing controller,
which improves the slippage calculation, especially at higher loads. The control times
are considerably faster compared to the Normal ISD control (P219 = 100)

Pos : 140 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P200-P299/ Paramet er P2xx – R egel ungs-/ Kennli nien-Paramet er @ 0\ mod_1327590712994_388. doc x @ 8324 @ @ 1

P2xx

Control/characteristic curve parameters

NOTE:

"typical"

P211

P210

P204

P201

P216

P215

Output

voltage

Output frequency

Time

Settings for the...

Current vector control (factory setting)

P201 to P209 = Motor data

P210 = 100%

P211 = 100%

P212 = 100%

P213 = 100%

P214 = 0%

P215 = no significance

P216 = no significance

Linear V/f characteristic curve

P201 to P209 = Motor data

P210 = 100% (static boost)

P211 = 0%

P212 = 0%

P213 = no significance

P214 = no significance

P215 = 0% (boost precontrol)

P216 = 0s (time dyn. boost)

Pos : 141 /Anleit ungen/5. / 6. Parametrier ung [BU 0500 / BU 0200]/ Par ameter/ P200-P299/ Paramet er P220 – Para.-i dentifi kati on @ 0\ mod_1327590796917_388. doc x @ 8347 @ @ 1