Motor control operations
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Note:
Turning the P3 potentiometer modifies the "phase shift" parameter. To optimize driving, the
correct value of this parameter must be set. Finding the optimum value of the "phase shift"
can be useful to monitor the DC current provided by the power supply. You should try to
fine-tune the P3 potentiometer to minimize current absorption. When this parameter has
been found, the potentiometer P3 can be left at this value for all future tests.
During any state: idle, start, run or brake, a blinking red LED indicates a fault condition. A
fault condition is due to one of the following:
●
hardware overcurrent: current flowing inside the motor reaches a value greater than the
maximum allowed current of 7.65 A (see
Section 7.4.16
).
●
Over-voltage: the bus voltage reaches a value greater than 29 Vac.
●
Over-temperature: the on-board temperature sensor measures a temperature greater
than 110° C.
●
Start-up failed: no signal is received from the sensors at the end of the start-up
sequence.
●
Motor stalled: during the running of the motor no sensor signal has been observed.
7.7.6
Changing the real-time parameters
The real-time parameters can be changed using the control board’s potentiometers.
Table 22
explains the potentiometer functionality based on the driving strategy.
If during the GUI configuration phase the "set phase shift according to Pf/F curve" control
was checked, the value of the "phase shift" is not set by P3 but is calculated at run-time
based on the Pf/F curve (see
Section 7.4.7
).
The maximum current allowed by the GUI has been set to 8 A (see
Section 7.4.8
).
7.7.7 Stopping
the
motor (LED action)
Push the Start/Stop button to stop the motor. The LEDs toggle from green to red to indicate
an "idle" state.
Table 22.
Potentiometer functionality based on an open-/closed-loop driving strategy
Open loop
Closed loop
P1
Sets the voltage modulation index from 0% to 100%
of the bus voltage.
Sets the target rotor frequency value from the
minimum value to the maximum value configured
(see
Section 7.4.6
).
P2
Not used
P3
Manual setting of the phase shift. The maximum CCW position is 0° of the phase shift and the maximum
CW position is 360° of the phase shift.
P4
Not used
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