IRMCK201 datasheet(2/62 Pages) IRF

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Dynamic braking control for excess DC bus voltage

IRMCK201

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Overview

IRMCK201 is a new International Rectifier integrated circuit device designed as a one-chip solution for complete

closed loop current control and velocity control for a high performance servo drive system. Unlike a traditional

microcontroller or DSP, IRMCK201 does not require any programming to complete complex AC servo algorithm

development. Combined with International Rectifier's high voltage gate drive and current sensing IC, the user can

implement a complete AC servo control with minimum component count and virtually no design effort. Although

IRMCK201 contains dedicated logic to perform closed loop control of AC current and velocity, it has a wide range of

application coverage through its flexible configuration ability. The drive can be easily configured for induction

machine closed loop vector control or permanent magnet motor servo drive. Rich motion peripherals, analog and

digital I/O can also be configured. Host communication logic contains an asynchronous RS232C or RS422

communication interface, a fast slave SPI interface and an 8-bit-wide Host Parallel Interface. All communication ports

have the same access capability to the host register set. The user can write to and read from the predefined registers to

configure and monitor the drive through these communication ports.

IRMCK201 Main Features

IRMCK201 contains the following functions for AC servo motor control applications:

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Complete closed loop current control based on Synchronously Rotating Frame Field Orientation

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Configurable update rate with PWM carrier frequency

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Configurable parameters (all PI controller gains, PI output limit range, current feedback scaling, encoder

feedback scaling)

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Configurable control structure for Induction machine or AC Permanent Magnet machine (Disable/enable slip

gain)

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Closed loop velocity control with configurable update rate

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Enable/disable velocity loop

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Selectable reference input for torque and speed input

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Analog reference input

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RS232C/RS422 reference input

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Cycle-by-cycle on/off Control for Brake IGBT

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DC bus voltage feedback

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Standard Encoder interface with Hall ABC support

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A/B quadrature signal input up to 1 MHz

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Choice of separate or multiplexed Hall A/B/C signal input

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Auto-initialization with Hall A/B/C plus Z pulse input

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Adaptable for any line count encoder from 200 PPR to 10,000 PPR

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1/T counter (1 MHz) for low speed performance improvement

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Space Vector PWM with deadtime insertion

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IR2175 current sensing IC interface

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IR213x high voltage gate driver IC interface

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Low cost serial 12 bit A/D interface with multiplexer and sample/hold circuit

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4 channel analog output by PWM

0-3.3 V, 120 kHz output

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EEPROM for startup initialization of internal data/parameters through host register interface

AT24C01A, 128 x 8

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