ST7FMC1M2T3 查看數據表（PDF） - STMicroelectronics

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ST7FMC1M2T3

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

STMicroelectronics 

ST7MC1xx/ST7MC2xx

10.6 MOTOR CONTROLLER (MTC)

10.6.1 Introduction

The ST7 Motor Controller (MTC) can be seen as a

Three-Phase Pulse Width Modulator multiplexed

on six output channels and a Back Electromotive

Force (BEMF) zero-crossing detector for sensor-

less control of Permanent Magnet Direct Current

(PM BLDC) brushless motors.

The MTC is particularly suited to driving brushless

motors (either induction or permanent magnet

types) and supports operating modes like:

– Commutation step control with motor voltage

regulation and current limitation

– Commutation step control with motor current

regulation, i.e. direct torque control

– Position Sensor or sensorless motor phase com-

mutation control (six-step mode)

– BEMF zero-crossing detection with high sensitiv-

ity. The integrated phase voltage comparator is

directly referred to the full BEMF voltage without

any attenuation. A BEMF voltage down to

200 mV can be detected, providing high noise

immunity and self-commutated operation in a

large speed range.

– Realtime motor winding demagnetization detec-

tion for fine-tuning the phase voltage masking

time to be applied before BEMF monitoring.

– Automatic and programmable delay between

BEMF zero-crossing detection and motor phase

commutation.

– PWM generation for three-phase sinewave or

three-channel independent PWM signals.

Table 22. MTC Functional Blocks

Section

Input Detection Block

Input Pins

Sensorless Mode

D Event detection

Z Event Detection

Demagnetization (D) Event

Z Event Generation (BEMF Zero Crossing)

Protection for ZH event detection

Position Sensor Mode

Sampling block

Commutation Noise Filter

Speed Sensor Mode

Tachogenerator Mode

Encoder Mode

Summary

Delay Manager

Switched Mode

Autoswitched Mode

Debug Option

Checks and Controls for simulated events

Speed Measurement Mode

Summary

PWM Manager

Voltage Mode

Over Current Handling in Voltage mode

Current Mode

Current Feedback Comparator

Current feedback amplifier

Measurement Window

Channel Manager

MPHST Phase State Register

Emergency Feature

Dead Time Generator

Programmable Chopper

PWM Generator Block

Main Features

Functional Description

Prescaler

PWM Operating mode

Repetition Down-Counter

PWM interrupt generation

Timer Re-synchronisation

PWM generator initialization and start-up

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