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

UM0121 - USER MANUAL

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

Clicking the "Advanced Settings..." button opens the "Advanced Settings" dialog box (see
3., page 7). This is where the advanced PMDC/AC motor type parameters are set.
There are 6 groups of settings that are specified by the user:
a. PWM (Pulse Width Modulation) Settings
– Pulse Width Modulation (PWM) Frequency in kHz
Note: The only value available in the Reference Design Kit is the "12.5kHz."
– PWM Minimum Off Time in microseconds (µs) to detect the BEMF
Note: The only values available in the Reference Design Kit are "2.5µs" and "5µs."
– Complementary PWM Signal (Synchronous Rectification)
Note: This setting is disabled in the Reference Design Kit at this time.
b. Current Loop
– Current Blanking Window - prevents erroneous sampling of the current after the PWM is turned
ON in milliseconds (ms)
– Current Event Counter Filter - defines the number of counter events required to validate a current
limitation event
c. D and Z Sampling Parameters
– Sampling Clock (ISCF) - sets the frequency of the sampling clock for D and Z events in kHz
– Unused MCIx (Motor Control) Input - defines in which state the unused MCI input can be fixed,
either "Grounded" or "Hi-Z"
d. Zero Crossing
– After D Blanking Window - set the blanking window after a D event in microseconds (µs)
– Z Event Counter Filter - defines the number of counter events required to validate a Z event
– Threshold Voltage - voltage set (in Volts) for Z detection
e. Demagnetization
– After C Blanking Window - set the blanking window after a C event in microseconds (µs)
– D Event Counter Filter - defines the number of counter events required to validate a D event
– Demagnetize "All Hardware," "Alternate Hardware/Software," or "All Software"
Note: The only option available in the Reference Design GUI is the "Alternate Hardware/Software"
event.
Note: The Demagnetization Time option is not available in the Reference Design Kit at this time.
Note: The Force Duty Cycle During Demagnetization option is not available in the Reference
Design Kit at this time.
Note: The Duty Cycle option is not available in the Reference Design Kit at this time.
f. Stop Condition
– Free Wheeling - after Stop, the motor will continue to spin freely
Note: Only the Free Wheeling Stop Condition is available in the Reference Design Kit at this time.
– DC Current Braking
Note: This option is not available in the Reference Design Kit at this time.
Note: The Brake Level setting is not available in the Reference Design Kit at this time.
Note: The Brake Time setting is not available in the Reference Design Kit at this time.
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