Wednesday, August 30, 2006
Mitsubishi Electric Introduces New Transfer-Mold/1 DIP-IPM; World's First IPM for Fuel Cell & Hybrid Automotive Motor Drive Applications
Mitsubishi Electric Corporation (President and CEO: Tamotsu Nomakuchi) today introduced a super high reliability Dual-In-Line Package Intelligent Power Module (DIP-IPM) targeted for motor inverter drives of Hybrid Electric Vehicle (HEV) and Fuel Cell Electric Vehicle (FCEV) applications or auxiliary machines. This DIP-IPM product is the first of its kind in the world.
Traditional DIP-IPMs are mainly used for inverter drives in home appliances such as room air conditioners, washing machines and refrigerators. The super high reliability DIP-IPM is also suitable for automobile applications, thus contributing to the miniaturization of automobile inverter drive systems.
The increased use of energy-saving air conditioners in green automobiles (HEV, FCEV) is in response to environmental concerns. To meet this need, smaller and more reliable IPMs are required in the inverter drives for them and other auxiliary motors. The application of DIP-IPMs in electric automobiles is expected to contribute to the miniaturization of inverter drive systems in other auxiliary motors as well.
There are three main features for this application:
1. High Reliability with Reduced Mounting Surface Area
Development of high quality IPMs should improve product performance in harsh environmental conditions. Failure probability has been greatly minimized through quality control management. The temperature cycle capability has been improved considerably by employing the new structure power chips (IGBT/2, FWD/3, HVIC/4, LVIC/5). By using the new IPM, the mounting surface area of the device and its interface circuit is reduced by about 40 percent, compared with traditional IPMs with the same 30A/600V rating. This results in considerable space savings.
2. Simplified Circuit Design by High Active Drive Logic
The start up sequence of the control supply is required as a countermeasure against possible malfunctions during the control supply power on-and-off period in a traditional IPM system. With the high active drive logic, this requirement is no longer necessary. Furthermore, the new approach offers a versatile interface compatible to 3V class MCU or DSP.
3. Reduction of malfunctioning by EMI/6 Noise Reduction
By optimizing the switching speed, EMI noise in the new DIP-IPM has been reduced by about 10db in comparison with traditional products.
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