Vibrations plague manufacturer, a large-capacity inverter with low noise saves production line from shut down.

Key Aspects of the Solution

  • A low-distortion sinusoidal power supply drives the motor and eliminates torque ripple from the inverter.
  • Power supply replaced existing inverter as low ripple current voltage source.
  • Prevented production line shut down. 

We replaced the inverter with Kikusui’s PCR-WE/WE2 and found it was both higher powered and quieter while producing little ripple current.”—Divisional Head.

Kikusui offered a solution to the divisional head. The PCR-WE/WE2 series of Ultra-compact AC/DC programmable power supply would mitigate complications from vibration.

I was surprised by the low ripple noise in the output,” reports the divisional head. “Normally, supplies’ ripple and noise increase with the power. PCR-WE/WE2 series doesn’t have this problem. We replaced the inverter with Kikusui’s PCR-WE/WE2 and found it was both higher powered and quieter while producing little ripple current.

With a low ripple current, they found that the true source of the vibrations was not the motors.

With the PCR-WE/WE2 inverter in place, they found the source of the vibrations. They supplied the motor with a low-distortion, sinusoidal current, which meant the inverter generated less torque ripple.

We were able to assess the motor discretely,” reflects the divisional head. “We found it wasn’t the motors making the noise. We submitted our results to the customer and managed to avoid a production line shutdown.

 Compact and energy-efficient, PCR-WE/WE2 inverters are also durable with a capability of 100% power regeneration* and no reverse load flow time limit. 

The PCR-WE/WE2 saved us from a shutdown,” observes the divisional head. “We can see it being used in motor-testing, as well as research and evaluation.

*Regeneration is limited within the installation site and is only supported by three-phase 200V input models whose model numbers end in “R.”