Edwards EXC 120 Turbo Pump Controller, D39616000

Edwards EXC 120 Turbo Pump Controller, D39616000

The Edwards EXC120 Controller generates the electrical supply and the control signals necessary to operate an EXT pump and its accessories. D39616000, EXC-120

The Edwards EXC120 Controller has a high-efficiency, auto-ranging power supply which adjusts itself to any external electrical supply in the specified voltage range. The power supply converts the single-phase electrical supply into a regulated d.c. electrical supply to control the
operation of the EXT pump. The pump has three Hall effect devices which operate as rotor position sensors. These sensors ensure that the drive current is correctly commutated to the pump-motor phase-windings. The Hall effect devices also generate a speed signal which the Controller uses to regulate the rotational speed of the pump.

The Edwards EXC120 Controller has a secondary regenerative supply which uses the d.c. motor of the EXT pump as a generator. If the electrical supply fails, the regenerative supply provides the Controller with a back-up source of power without the need for batteries. All Controllers use the regenerative supply to maintain the electrical supply to the vent-valve until the pump speed falls to below 50% of full rotational speed. The Controllers have a number of safety features which limit the power supplied to the EXT pump in the event of sustained high pressure or temperature:

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