IKD06N60RF

Introduction and Short Description of the Product Family

The RC-Drives IGBT technology was released by Infineon at the end of 2009 as a costoptimized solution to address the price-sensitive Consumer drives market. This basic technology provides outstanding performance in BLDC motor drives adopting block commutation–type of modulations, were one or both IGBT in the half-bridge are left conducting for 120° of the motor electrical angle (Dae-Woong Chung et al., IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 46, No. 3, June 1999). Thanks to the low conduction losses of both IGBT and integrated diode the overall losses are drastically reduced. This type of control is commonly found in Fridge compressors: by limiting the hard switching events the dV/dt and dI/dt commutation slopes are avoided, therefore the harmonic content injected into the motor windings (hence the EMI) is reduced. Below a typical example of this type of commutation found on a 100W commercial fridge compressor:

Another application that benefits from the low on-state losses or the RC-Drives is found in Domestic Aircon systems: the ~1.5 kW BLDC compressor is driven by IGBTs switched by full sinusoidal PWM hard switching at moderate switching frequencies of 5 to 8 kHz. Again in this case a device optimized for low conduction losses provides an overall loss reduction.

However the trend observed in low power drives for outdoor and indoor fan of domestic Aircon systems as well as industrial funs and pumps up to ~200W is to increase the PWM switching frequency. The reason is twofold: on one side the size of the output filter can be reduced by keeping the same current ripple. On the other side in small motor drives adopting sensor-less FOC (Field Oriented Control), were a high dynamic control (torque and speed) of the PMSM motor is required, the higher switching frequency allows to increase the sampling rate of current and hence the accuracy of reconstructed rotor position.

In order to meet the rising demands of the IGBTs for the low power motor drive consumer market, a new version of the RC-Drives IGBT is developed: the IGBT and diode losses are optimized to reduce the inverter losses at switching frequencies of 18~20kHz. The new family is called RC-DF, and released in the current classes from 2.5A to 15A in D-PAK packages.