Notch Position Search With The Injection Method; Parameter Survey And Parameter Description; Error Response At Notch Position Search 2 - Baumuller b maXX BM3000 Operating Manual

Description of the Software Modules and Parameters
4.8.9

Notch position search with the injection method

This method is used for applications, where the motor shall not move or shall only move
a bit. However this method can be not used with all motors, as for example with ironless
motors.
The notch position search takes place in two steps:
m The motor is applied with high-frequency voltage, which also causes a clearly audible
m In the second step, the notch angle, which was found, is checked if it 180° next to it or

4.8.9.1 Parameter survey and parameter description

Besides the notch position search method 2 (injection method), the parameters are addi-
tionally used for the sensorless control of the synchronous machines. Therefore, they are
shown in the
ZDescription of the Parameters–

4.8.9.2 Error response at notch position search 2

The errors 600-602 can occur at notch position search with injection (method 2). The
causes and the possibilities for troubleshooting are listed in the following table:
Error no.
600
601
602
noise. The electrical angle is searched via the tracking controller. The voltages and fre-
quencies are set via the parameters Z133.3–, Z133.4–,
if it is not. The ratio from the 2nd harmonic to the fundamental frequency is checked for
this.
ZParameter overview–
Cause
Plausibility error in step 1.
The results of the notch posi-
tion search do not agree
Plausibility error in step 2.
The part of the second har-
monic is too small.
Overcurrent during notch posi-
tion search method 2
from page 649 and are described under
from page 650.
Reaction
Increase the injected current in step 1:
1: Via a higher voltage (Z133.3–)
2. Via a less frequency (Z133.2–)
Or increase the gain of the compensating controller (Z133.5–).
Please note: better results are yielded at higher frequencies
Increase the injected current in step 2:
1: Via a higher voltage (Z133.7–)
2. Via a less frequency (Z133.6–)
Or decrease minimum rate of the 2nd Harmonic (Z133.10–)
(Only if it is secured, that the lesser minimum rate is enough.)
Decrease the injected current in step 2:
1: Via a less voltage (Z133.7–)
2. Via a higher frequency (Z133.6–)
Parameter manual b maXX BM3000
Document no.: 5.12001.07
Z133.6– and Z133.7–.
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