IRMD26310DJ

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© 2008 International Rectifier

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IRMD26310DJ - Hardware Description

The IRMD26310DJ reference design kit supports the evaluation of the IRS26310DJ which is a high voltage power

MOSFET and IGBT driver with integrated DC Bus overvoltage protection. The reference design is a full-function

unit operating out of 220VAC input. An onboard digital controller IC enables driving an Induction Motor in open-

loop Volts-per-Hertz mode. The included GUI software allows modification of system parameters in order to drive

an induction motor in open-loop Volts-per-Hertz mode and study the IRS26310DJ high voltage gate driver IC by

changing parameters such as PWM frequency and deadtime. In addition to DC Bus overvoltage protection

offered by IRS26310DJ, the reference design is equipped with protection against motor line-to-line and line-to-DC

Bus(-) short by way of IRS26310DJ ITRIP function and also a GUI software controlled motor current limit. The

board includes multiple test points to facilitate monitoring IRS26310DJ input and output signal waveforms and

examining its various features.

Top Level Description

The IRMD26310DJ reference design is composed of the following key blocks:

•

The Input Stage includes an EMI filter, 8A bridge rectifier and dc bus capacitor rated for 400W continuous

operation. It is noted that IRMD26310DJ does not feature a current limiting fuse.

•

The Power Inverter uses 6 x IRGIB10K60D1 IGBT power switches mounted on a 1.9

IGBTs can be replaced with user preferred power devices but user may need to replace components

such as bridge rectifier & dc bus current shunt to match the device ratings.

•

The IGBTs in the power inverter stage are driven by the IRS26310DJ Gate Driver and associated circuitry

involving bootstrap capacitors, gate drive timing resistors, and fault diagnostic elements.

•

The Control Circuitry for driving the motor is based on the IRMCF341 digital control IC. The IRMCF341

control IC has been configured to run an induction motor in the open-loop Volts-per-Hertz mode. The

control IC generates the PWM signals for IRS26310DJ gate driver. The user also has the option to drive

the IRS26310DJ externally by disconnecting the jumpers on connector P1 and bridging in external

connections. The digital IC communicates with a PC over an isolated serial link and the included GUI

software allows the user to set the motor speed and modify common inverter parameters such as

switching frequency and deadtime.

•

An on-board DC-DC Converter low voltage power supply derives the 15V, 3.3V & 1.8V rails from the

main dc bus.

For more information regarding the other blocks of the reference design, please refer to the detailed schematics.

Figure 1: IRMD26310DJ System Block Diagram