Dual silicon high frequency inverter

In many applications, it is important for an inverter to be lightweight and of a relatively small size. This can be achieved by using a High-Frequency Inverter that involves an isolated DC-DC stage (Voltage Fed Push-Pull/Full Bridge) and the DC-AC section, which provides the AC output.

The power supply topologies suitable for the High-Frequency Inverter includes push-pull, half-bridge and the full-bridge converter as the core operation occurs in both the quadrants, thereby, increasing the power handling capability to twice of that of the converters operating in single quadrant (forward and flyback converter).

The first example regards traction inverters with 750 Hz switching frequency at 1500 V dc-link voltage. The losses generated by the Si-based CM600DA-66X and the SiC-based FMF750DC-66A are compared. Figure 4 (a) shows the energy savings using the FMF750DC-66A instead of a CM600DA-66X.

side inverters or dc-dc converters, the higher switching frequency enables the design of more compact high-speed drives and medium-frequency converters [3,4]. Besides the switching frequency increase, Figure 4 (b) has already demonstrated that keeping the switching frequency constant, the converter achieves significantly higher output power.

Wolfspeed presents a new high-performance, low-cost, compact 3-phase inverter based on next generation power modules which are specifically optimized to fully utilize Wolfspeed's third generation of Silicon Carbide (SiC) MOSFETs.

Now, after years of in-field experience with diferent SiC modules in traction application, Mitsubishi Electric makes the next big step. With a rated voltage of 3.3 kV and a current of 750 A, the new Full SiC dual module is especially intended for high performance traction converters and flexible converter designs.