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Active Wave Canceler

Tech ID:
Principal Investigator:
Hui Li
Licensing Manager:

A device to solve over voltage issues caused by the reflected wave phenomenon (RWP). A motor drive connected to a motor through long cables can cause the reflection of the electromagnetic wave, resulting a voltage spikes at the motor side that is twice as high as the voltage at the drive side.  This transient over voltage can damage the insulation of the motor or reduce its useful life. The canceler detects rising/following edge of the motor drive and generates a short pulse that breaks the voltage slope so that over voltage at motor side is suppressed.