MV1000 medium-voltage AC drives from Yaskawa America combine compact modular design, high efficiency, low harmonics and high mean time between failures in a drive compatible with 1000 Series low-voltage AC drive products. Smart Harmonics reduces input total harmonic distortion (THD) to less than 2.5 percent without filters. They also provide galvanic isolation between power input and output. They use two 5-volt step bridges per phase to generate a 17-level line-to-line voltage output delivered to the motor. The near sinusoidal waveform results in low THD voltage, low torque ripple and ideal low-speed torque without output filters. They are available in 2.4 kV models with outputs from 200 to 2,750 hp, and 4.16 kV models with outputs from 300 to 5,000 hp. 414/856-2496; www.yaskawa.com.