The power pulses create a magnetic field across an air gap, interrupting the field created by the permanent magnets. This causes the counterweights to move until the rotor is rebalanced. The process is accomplished within seconds. Once the balance adjustments are completed, the magnets lock the rotor assemblies into their new position. No more power is required to maintain balance, reducing the system's overall energy consumption.
Most installations use more than one balancer ring.
They are connected to a control room computer that tracks the interactions of multiple balancer rings and provides simultaneous control to institute multiple-plane balancing. Increasing Ammonia Productivity PCS Nitrogen, a chemical processor, has reduced the overhauls of turbomachinery at its Lima, Ohio, ammonia processing plant by installing the EM-2000 active balancing system on its main process air compressor train. This installation reduced the repair costs and production downtime. The plant is operated by BP Chemical, a division of British Petroleum plc in London, and produces about 1,500 tons of ammonia products per day. PCS Nitrogen halved the overhauls of the compressor at its ammonia plant in Lima, Ohio, by installing an active balancing system to reduce vibration that damaged bearings.