Abstract: A system for controlling a switch reluctance machine is provided. The system includes multiple phases located in the switch reluctance machine, each phase having multiple machine coils. Each machine coil is independently connected to a positive side switch circuit and a negative side switch circuit. Each positive side switch circuit is in electrical parallel connection with the other positive side switch circuits, and configured to control the flow of current through the machine coil to which it is connected. Similarly, the negative side switch circuits are connected in electrical parallel and configured to control the flow of current through the machine coil to which they are connected. The positive side and negative side switch circuits may be provided in a buck boost configuration or two half bridge configurations.

Abstract: In a process for biodegrading glycerin used to store or preserve membranes, water in a tank is inoculated with glycerin digesting microorganisms. The water is aerated to support growth of the microorganisms. The water is filtered through the membranes and the filtrate returned to the tank. The glycerin is rinsed out of the membranes and biodegraded in the tank. The process may be performed in-situ in a water or wastewater treatment plant as part of the start-up procedures for the plant.

Abstract: A system for controlling a switch reluctance machine is provided. The system includes multiple phases located in the switch reluctance machine, each phase having multiple machine coils. Each machine coil is independently connected to a positive side switch circuit and a negative side switch circuit. Each positive side switch circuit is in electrical parallel connection with the other positive side switch circuits, and configured to control the flow of current through the machine coil to which it is connected. Similarly, the negative side switch circuits are connected in electrical parallel and configured to control the flow of current through the machine coil to which they are connected. The positive side and negative side switch circuits may be provided in a buck boost configuration or two half bridge configurations.

Abstract: An inverter switch circuit for a permanent magnet machine is provided. Inverter switch circuit has two or more half bridge switch circuits per phase in communication with an equal number of machine coils per phase, of the permanent magnet machine. Each half bridge circuit includes a first and second power switch in electrical series connection. Further, each half bridge circuit is in electrical connection with each machine coil, thereby providing multiple parallel half bridge circuits for each phase.