Yaskawa matrix drive secures certifications

The Yaskawa U1000 matrix drive has received certifications for marine use Photo: Yaskawa The Yaskawa U1000 matrix drive has received certifications for marine use Photo: Yaskawa

Japanese drives and motion control company, Yaskawa, has announced new certifications for its U1000 matrix drive for marine installations.

The drive controls the motor load by directly converting AC input voltage to AC output eliminating the need for a rectifying circuit and DC smoothing circuit typically found in conventional voltage source inverter (VSI) drive systems.

No need for external filters

With a conventional VSI drive there is a need for heavy filtering to avoid input harmonic distortion (THDi) and to keep the IEEE 519 limits within harmonic guidelines.

A drive without any external filtering can result in distortion of around 88%. Heavy filtering can keep the input current harmonic level below 10% but it requires an additional 12 pulse input transformer and a 12 pulse ready drive.

The U1000 is a simple three wire in/three wire out installation and reduces THDi to 5% without the need for cumbersome external transformers or filters. Additionally, the reduced current distortion improves the power factor and therefore reduces the energy cost.

The U1000 has been certified by NK, BV, DNV/GL, ABS, LR and KR.

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