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Standby Power Saving in Mechanical Vacuum Pump Realized by Implementation of the Sleep Mode


Mechanical vacuum pumps are widely used to realize low vacuum environments and are commonly set to operate continuously to maintain a certain standby pressure in vacuum systems. Huge electric power consumption during the standby state could be observed. This thesis presented a method by implementing a mode-switch mechanism to the pump that could achieve 80% standby power saving. This mechanism allows the pump to switch between its normal work mode and a sleep mode, which would shut off the pump’s power supply and let the pressure inside the vacuum chamber increase to a threshold above its standby pressure. Once the threshold is reached, the work mode would restore the power supply and pump down the chamber to its standby pressure. A detection module was developed to suspend the mode switching when users are operation the tool. The power-saving results and impacts of sleep mode with different threshold pressure were analyzed in this thesis.

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