Adjustment Of Resolver Offset - BONFIGLIOLI ACTIVE CUBE Applications Manual

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When a speed sensor is used, the current orientation is determined using the captured speed sensor
pulses based on the identified flux direction of the machine. Once the reference pulse was captured
twice at the correct distance, the mechanical orientation of the machine is considered as known. In
this way, field-oriented operation of the PMSM is possible using a speed sensor instead of a resolver.
Set Parameter
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Operation Mode Search Run
5.1.1.3 "Determination of the flux direction at startup".
5.1.2.4

Adjustment of resolver offset

The flux direction identified upon startup has an uncertainty of some degrees. For exact field-
orientation, it is recommended to adjust Parameter
with resolvers, see Chapter 4.4 "For Configuration 806 (PMSM): Self-configuration of resolver offset".
NOTE
In operation with speed sensor, the resolver offset is defined as the angle between zero pulse of the
speed sensor and the flux direction. The offset is referred to the mechanical angle, not the electrical
angle. For this reason, the maximum value should be 360°/number of pole pairs.
5.1.2.5 Actual speed source
Via Parameter
Actual Speed Source
sources for the speed controller.
With setting "7 – Speed Sensor 2/Machine Model", two actual speed sources can be combined. In this
way, it is possible to switch from a high speed range in sensor-less field oriented operation to a lower
speed range in speed sensor operation.
The switching limit between speed sensor and machine model is defined in this setting by Parameter
624, see Chapter 5.1.2.6 "Speed sensor monitoring".
Frequency Limit
The change to operation with speed sensor enables axle positioning in high-speed spindles for tool
replacement.
Parameter
No. Identifier
766
Act. speed source
Operation Modes of Parameter 766
1 - Speed Sensor 1
2 - Speed Sensor 2
3 - Machine Model
7 - Speed Sensor 2/Machine Model
32
645 to "10 - Quick Synchronisation", see Chapter
Offset
766, the software enables selection of different actual speed
Unit
-
Actual speed of speed sensor 1
Actual speed of speed sensor 2
Below the
ing current (
quency limit, calculation of speed according to ma-
chine model (sensor-less field orientation).
Below the
Speed Sensor 2. Above the frequency limit, calculation
of speed according to machine model (sensor-less
field orientation).
ACU
Spindle Applications
382, like in the case of operation of PMSM
Setting range
Selection
624, impression of start-
Frequency Limit
623). Above the fre-
Starting Current
624 actual speed from
Frequency Limit
Default settings
3-Machine Model
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