MPH-02, MPB-02, MPD-02
Drive Control
6-1
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
6 Drive
Control
6.1
Overview of Drive Control
The IndraDrive firmware supports the following two basic principles of
drive control:
•
open-loop axis control
or
open-loop operation
(open-loop U/f
control)
→
open-loop-controlled operation without encoder information
•
closed-loop axis control
or
closed-loop operation
→
closed-loop-controlled operation with encoder feedback
Note:
Using the closed-loop operation makes higher demands to the
hardware design of a drive, as it always requires a motor
encoder.
Open-Loop Axis Control (Open-Loop Operation)
In the case of open-loop axis control ("open-loop operation"), controlling
the drive is only possible without encoder. Consequently there are
restrictions in the selection of operating modes (no position control
modes).
Motor control in this case takes place as open-loop U/f control (see
"Voltage-Controlled Operation (Open-Loop U/f Control)" in section "Motor
Control").
master
oper. mode 2
oper. mode 1
DF000090v01_en.fh7
open-loop drive control
cmd. value adjustment
(depending on oper. mode)
drive controller
open-loop
motor control
(U/f)
- without encoder -
limitation
torque/current
Fig. 6-1:
Principle of drive control of open-loop operation
See also section "Open-Loop Axis Control (Open-Loop Operation)" in the
same chapter
See also section "Functional Packages" in chapter "System Overview"
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of
CMA/Flodyne/Hydradyne
▪
Motion
Control
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Hydraulic
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Pneumatic
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Electrical
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Mechanical
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426-5480
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