3Ph Pmdc/Ac Or Bldc/Ac (Trapezoidal Driven) Motor Initial Settings - ST ControlBD-7FMC2 User Manual

UM0121 - USER MANUAL

3PH PMDC/AC or BLDC/AC (Trapezoidal Driven) Motor Initial Settings

Clicking "Ok" after selecting the 3PH PMDC/AC or BLDC/AC (Trapezoidal) option opens the "3PH PMDC/
AC or BLDC/AC (Trapezoidal) - Sensorless - Voltage Mode" dialog box (see
where the basic PMDC/AC motor type parameters are set.
There are 8 groups of initial settings that are specified by the user:
a. Pole Pairs - the number of Pole (North/South) Pairs in the motor
b. Speed Regulation - the manner in which to run the motor, either Open Loop (without speed regulation)
or Closed Loop (with speed regulation)
c. Driving Mode
– the motor driving mode, Current Mode or Voltage Mode
Note: The only option available in the Reference Design Kit is the "Voltage Mode."
– Power Board - the Power Board that is being used (e.g., PowerBD-300, PowerBD-1000,
PowerBD-3000)
– Current Limitation - the maximum value of the current that can flow inside one (of three) phases
d. Detection Mode - the Back EMF (BEMF) Detection Mode (rotor position), either Sensorless, Hall
(Effect) Sensor 60°, or Hall (Effect) Sensor 120°
Note: The only option available in the Reference Design Kit is the "Sensorless" mode.
e. Alignment Phase
– the percentage of Final Duty Cycle applied at the end of alignment phase
– the phase Alignment Duration in milliseconds (ms)
f. Acceleration Phase
– the Mechanical Acceleration Rate of the rotor during the Ramp UP in RPMs (or Hz) per second
(alternate between RPM and Hz settings by clicking on the "RPM" button)
– the Duty Cycle percentage during the Ramp Up
– the Number of Consecutive Z events that occur before the microcontroller runs the motor in auto-
switched mode
g. g. Synchronous Speed
– the Minimum target rotor frequency in closed loop, express in Hz of mechanical speed
– the Maximum target rotor frequency in closed loop, express in HZ of mechanical speed
h. Run Settings
When the "From RV1" checkbox is selected, the, Duty Cycle value (or the target rotor speed in the
case of closed loop regulation) is defined by the RV1 potentiometer.
If this box is unchecked, the following options are set by the user:
– the Target Mechanical (rotor) Speed in RPMs (or Hz) if speed regulation is set to "Closed Loop"
(alternate between RPM and Hz settings by clicking on the "RPM" button)
– the Duty Cycle percentage when the motor is run in "Open Loop" mode
Run Settings and Delay Coefficient
When the "From RV2 - RV3" checkbox is selected the value of Rising Delay is defined by the RV2
potentiometer and the value of Falling Delay is defined by the RV3 potentiometer.
If this box is unchecked, the following options are set by the user:
– the B-EMF Rising Edge delay coefficient value (from 0 to 255)
– the B-EMF Falling Edge delay coefficient value (from 0 to 255)
Run Settings and Closed Loop Parameter
– the value of the Integral Coefficient (Ki) of the Proportional Integrative (PI) regulator
– the value of the Proportional Coefficient (Kp) of the PI regulator
– the regulation Sampling Time (in milliseconds)
i. The "Change Motor Type" button enables the user to change the motor type(see
4/21
Figure 2., page 5). This is
Figure 1., page 3).