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IRMCF171 Datasheet(PDF) 7 Page - International Rectifier

Part # IRMCF171
Description  High Performance Sensorless Motor Control IC
PDF  36 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IRMCF171 Datasheet(HTML) 7 Page - International Rectifier

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IRMCF171
7
www.irf.com
© 2013 International Rectifier
April 20, 2013
3 IRMCF171 Block Diagram and Main Functions
IRMCF171 block diagram for leg shunt mode is shown in Figure 3.
Motion Control
Sequencer
Dual Port
RAM
2 KB
MCE
Program
RAM
12 KB
Program
FLASH
64 KB
A/D
MUX
S/H
D/A
(PWM)
Timer
Counnter 0,1,2
Watchdog
Timer
Motion
Control
Modules
UART
I2C
SND
RCV
6
Low Loss
SVPWM
AIN0
GATEKILL
To IGBT
gate drive
Flexible Motion
Control Engine
(MCE)
Monitoring
Host
Interface
Digital
I/Os
8bit (8051)
microcontroller
AIN1
AIN2
JTAG
Emulator
Debugger
4
Freq
Synthesizer
2
Ceramic
Resonator
(4MHz)
20MHz
AIN3
analog
input
2
Capture
Interrupt
Control
Single Shunt
Motor Current
Reconstruction
From
shunt
resistor
Speed
command
PORT 1
SCL
SDA
PORT 2
PORT 3
AIN4
8bit
CPU
Core
Local
RAM
2 KB
120MHz
IFB
3
AIN5
3
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
I
2C/SPI port
2K byte data RAM



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