AC / variable frequency motor systems demand controlled 3-phase power, efficient switching, accurate feedback and protection across rectifier, DC-Link, and inverter stages. The AC motor drives / VFDs must generate precisely controlled 3-phase power to regulate motor speed and torque, while managing switching noise.
Enabling AC motor drives and VFDs are Vishay's power MOSFETs, high power modules, and diodes and rectifiers that form the AC input rectification and 3-phase inverter stages, while gate drivers and optocouplers switch and isolate the high side and low side power devices safely. Braking resistors, shunt resistors, and thermistors manage regenerative energy and monitor drive temperature, and aluminum electrolytic and film capacitors filter and stabilize the DC bus.
Behind AC motor drives and VFDs is The DNA of tech.®
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