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ST7MC1K2 数据表(PDF) 180 Page - STMicroelectronics |
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ST7MC1K2 数据表(HTML) 180 Page - STMicroelectronics |
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180 / 371 page  Obsolete Product(s) - Obsolete Product(s) On-chip peripherals ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto 180/371 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 sensorless 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, that is, direct torque control ● Position sensor or sensorless motor phase commutation control (six-step mode) ● BEMF zero-crossing detection with high sensitivity. The integrated phase voltage comparator is directly referred to the full BEMF voltage without any attenuation. A BEMF voltage down to 200mV can be detected, providing high noise immunity and self-commutated operation in a large speed range. ● Realtime motor winding demagnetization detection 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 80. MTC functional blocks Section Page Input detection block 189 Input pins 189 Sensorless mode 192 D event detection 193 Z event detection 195 Demagnetization (D) event 197 Z event generation (BEMF zero crossing) 200 Protection for ZH event detection 201 Position sensor mode 202 Sampling block 203 Commutation noise filter 206 Speed sensor mode 208 Tachogenerator mode 209 Encoder mode 210 Summary 211 Obsolete Product(s) - Obsolete Product(s) |
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