ST7FMC1K2B3 STMICROELECTRONICS [STMicroelectronics], ST7FMC1K2B3 Datasheet - Page 144

• Manufacturer Part Number: ST7FMC1K2B3
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
Finally, the PWM modulated voltage generated by
the power stage is smoothed by the motor induct-
ance to get sinusoidal currents in the stator wind-
ings.
The induction motor being asynchronous, there is
no need to synchronize the rotor position to the
sinewave generation phase in most of the applica-
tions.
Part of the MTC dedicated to delay computation
and event sampling can thus be reconfigured to
Figure 75. Complementary PWM generation for three-phase induction motor (1 phase represented)
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1
register processing
Compare preload
PWM generator
counter
Dead time
insertion
U event
PWM Ref
Signal
MCP0
MCPU
MCO1
MCO0
perform speed acquisition of the most common
speed sensor, without the need of an additional
standard timer.
This speed measurement timer with clear-on-cap-
ture and clock prescaler auto-setting allows to
keep the CPU load to a minimum level while taking
benefit of the embedded input comparator and
edge detector.