ROHM has developed four new 600V IGBT IPMs in its BM6437x series that produce best-in-class low noise characteristics together with low loss perfect for power conversion in inverters. The devices are employed in compact industrial equipment, such as small capacity motors for robots, and home appliances, including air conditioners and washing machines.
The company has developed this new four-model lineup of IGBT IPMs, achieving excellent characteristics by simultaneously decreasing radiated noise and power loss. Optimising the built-in IGBT’s characteristics and soft recovery characteristics of the internal FRD enables the series to reduce radiated noise by more than 6dB (at peak comparison) over standard products, making it conceivable to consider simplifying the noise filter that is often needed. Also, the latest low-loss IGBTs adopted in these IPMs decrease power consumption over the company’s conventional IPM products by 6% (fc=15kHz), deliver class-leading low loss and contribute to a decrease of various equipment power consumption. Also, the new product dramatically enhanced the built-in temperature monitoring function results in high ±2% accuracy (equivalent to 2C). This makes it feasible to consider removing the external thermistor needed with existing high accuracy temperature monitors, decreasing the number of external parts along with design load.
Moreover, a new function for identifying the product after mounting has been added to prevent mounting errors. Error identification mode has also been added. This integrated function serves to distinguish the failure status by applying ‘Short Current Protection’, ‘Under voltage Protection’ or ‘Thermal Shutdown Protection’.