IRMCF171 データシートの表示（PDF） - International Rectifier

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IRMCF171

High Performance Sensorless Motor Control IC

International Rectifier 

IRMCF171

3 IRMCF171 Block Diagram and Main Functions

IRMCF171 block diagram for leg shunt mode is shown in Figure 3.

Monitoring

Speed

command

SND

Host RCV

Interface SCL

SDA

Digital

I/Os

2

D/A

(PWM)

Capture

Timer

Counnter 0,1,2

Watchdog

Timer

UART

I2C

PORT 1

PORT 2

PORT 3

Program

FLASH

64 KB

8bit

CPU

Core

Local

RAM

2 KB

8bit (8051)

microcontroller

Interrupt

Control

4

Emulator

Debugger

2

Ceramic

Resonator

(4MHz)

JTAG

Freq

20MHz

Synthesizer 120MHz

Flexible Motion

Control Engine

(MCE)

6

Low Loss

SVPWM

To IGBT

gate drive

GATEKILL

Single Shunt

Motor Current

Reconstruction

Dual Port

RAM

2 KB

MCE

Program

RAM

12 KB

Motion

Control

Modules

A/D

MUX

S/H

IFB 3

AIN0

AIN1

AIN2

AIN3

AIN4

AIN5 3

From

shunt

resistor

analog

input

Motion Control

Sequencer

Figure 3. IRMCF171 Block Diagram

IRMCF171 contains the following functions for sensorless AC motor control applications:

Motion Control Engine (MCETM)

 Sensorless FOC (complete sensorless field

oriented control)

 Proportional plus Integral block

 Low pass filter

 Differentiator and lag (high pass filter)

 Ramp

 Limit

 Angle estimate (sensorless control)

 Inverse Clark transformation

 Vector rotator

 Bit latch

 Peak detect

 Transition

 Multiply-divide (signed and unsigned)

 Adder

 Divide (signed and unsigned)

8051 microcontroller

 Two 16 bit timer/counters

 One 16 bit periodic timer

 One 16 bit watchdog timer

 One 16 bit capture timer

 Up to 14 discrete digital I/Os

 Seven-channel 12 bit A/D

o Buffered (current sensing) two

channels (0 – 1.2V input)

o Unbuffered five channels (0 – 1.2V

input)

 JTAG port (4 pins)

 Up to two channels of analog output (8 bit

PWM)

 UART

 I2C/SPI port

 2K byte data RAM

7 www.irf.com

© 2013 International Rectifier

April 20, 2013

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