ST7MC2N6T3 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7MC2N6T3

8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI™

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

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.

Figure 75. Complementary PWM generation for three-phase induction motor (1 phase represented)

U event

Compare preload

register processing

MCP0

MCPU

PWM generator

counter

PWM Ref

Signal

MCO1

MCO0

Dead time

insertion

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