IRMCS2033

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2

Overview

The IRMCS2033 is a low voltage drive design platform for a complete Sensorless Permanent Magnet motor drive

system based on the IRMCK203 digital motion control IC. The system is based on a configurable control engine

implemented by hardware logic in the IRMCK203. The system has a simple and low cost structure, made possible by

advanced IR motion components including the IR2175 monolithic current sensing high voltage IC and IR2106 gate

driver IC. Instead of using IR2175 as current feedback option, IRMC2033 also supports Inverter Low side shunt

current feedback via A/D converter. These feedback options used in conjunction with the IRMCK203 simplify

hardware implementation. Since all control logic is implemented in hardware logic as opposed to programmed

software, unmatched parallel computation is achieved, resulting in higher bandwidth control and higher motor

operating frequency (15 usec minimum PWM loop cycle).

Despite hardware logic implementation, its design flexibility allows the user to configure Permanent Magnetic ac

motors (Sinusoidal Back EMF) with different motor parameters and different types of communication protocols.

Host

Controller

IR2175

IR2175

IRMCK203

Motor

DC Power

IRMCS2033

RS232C

or

RS422

θ

j

e

θ

j

e

2/3

Dead

time

Host

Register

Interface

Configuration

Registers

Monitoring

Registers

SPI

Interface

Space

Vector

PWM

Period/Duty

counters

Period/Duty

counters

BRAKE

FAULT

+

-

-

+

-

+

A/D

interface

A/D MUX

select

DC bus dynamic

brake control

Analog Speed

Reference

DC bus feedback

Parallel

Interface

EEPROM

Rotor Angle/

speed

Estimator

4

channel

D/A

Analog

Monitor

RAMP

Brake

Circuit w

Brake

Resistor

MOSFET Inverter

IR2106

IRFB59N10D

Figure 1. IRMCS2033 System Block Diagram