Description of the Software Modules and Parameters
Parameter manual b maXX BM3000
Document no.: 5.12001.07
503
of 820
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Furthermore, the field weakening factor of the parameter Z142.5– "Minimum field weak
factor" is limited:
Field weakening factor [Z142.2–] Minimum field weak factor [Z142.5–].
Further details see chapter ZField weakening controller– from page 494.
142.3 P-Gain of field weakening controller
Proportional gain of field weakening controller.
With a SM, the field weakening controller can be set more finely than with an ASM, as no
delay in the reduction of the field due to the rotor time constant occurs.
A P-gain of 0 switches off the field weakening controller.
142.4 Field weakening controller integral action time
Reset time of the field weakening controller.
At value 0 the integral part is set to 0 and the field weakening controller works without in-
tegral part.
142.5 Minimum field weak factor
The parameter is without unit and serves as a limit of the field weakening factor Z142.2–
The range of values extends from 0 to 1.
Field weakening factor [Z142.2–] Minimum field weak factor [>142.5<].
Of importance only if the field weakening type at the voltage limit is set (Z142.1–
bit 0 = 0).
See chapter ZField weakening controller– from page 494.
Considering the extreme cases:
Minimum field weak factor = 0 For SM: The parameterized field current
preset value Z19.9– can be reached.
For ASM: The flux set value Z146.13– can
be reduced to 0%
Minimum field weak factor > 0 For SM the parameterized field current
preset value Z19.9– can not be reached.
For ASM the flux set value in % can only be
reduced to 100 * "Minimum field weak
factor".
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