Abstract: A high-efficiency control system and method is presented. The system can feature a gate drive circuit, a floating charge pump and pump circuitry, and a bootstrap capacitor circuit having a floating ground. The floating charge pump features a ground electrically coupled to a load. The bootstrap circuit can feature a floating ground, with a floating voltage being carried across the bootstrap circuit and delivered to the gate drive circuit to produce an indefinite on-time for switching a high-side of a power supply to the load.

Abstract: A system monitors physical characteristics of or near a motor shaft, such as strain, temperature, voltage, and/or stress. The sensors can sense or measure these characteristics and transmit the measured values wirelessly to a remote user, who can monitor the motor shaft for signs of inefficiency or malfunction. Furthermore, the system can support communications between the remote user and a controlling element of the motor to monitor and adjust the motor shaft to operate with greater efficiency and safety.

Abstract: A system monitors physical characteristics of or near a motor shaft, such as strain, temperature, voltage, and/or stress. The sensors can sense or measure these characteristics and transmit the measured values wirelessly to a remote user, who can monitor the motor shaft for signs of inefficiency or malfunction. Furthermore, the system can support communications between the remote user and a controlling element of the motor to monitor and adjust the motor shaft to operate with greater efficiency and safety.

Abstract: A high-efficiency control system and method is presented. The system can feature a gate drive circuit, a floating charge pump and pump circuitry, and a bootstrap capacitor circuit having a floating ground. The floating charge pump features a ground electrically coupled to a load. The bootstrap circuit can feature a floating ground, with a floating voltage being carried across the bootstrap circuit and delivered to the gate drive circuit to produce an indefinite on-time for switching a high-side of a power supply to the load.

Abstract: A high-efficiency motor control system and method is presented for controlling an electric motor. The system can feature a multi-phase inverter having a logic control device and associated control circuity, a plurality of floating charge pumps and pump circuitry, a multi-phase bridge having a plurality of power switching devices and a bootstrap capacitor circuit having a floating ground. The floating charge pumps feature grounds electrically coupled to motor phase leads. The bootstrap circuit can feature a floating ground, with a floating voltage being carried across the bootstrap circuit and delivered to the switching devices to produce an indefinite on-time for the switching devices for switching the high-side of a power supply to a load.

Abstract: A high-efficiency motor control system and method is presented for controlling an electric motor. The system can feature a multi-phase inverter having a logic control device and associated control circuitry, a plurality of floating charge pumps and pump circuitry, a multi-phase bridge having a plurality of power switching devices and a bootstrap capacitor circuit having a floating ground. The floating charge pumps feature grounds electrically coupled to motor phase leads. The bootstrap circuit can feature a floating ground, with a floating voltage being carried across the bootstrap circuit and delivered to the switching devices to produce an indefinite on-time for the switching devices for switching the high-side of a power supply to a load.

Abstract: Pumps with low profile disk-type motors can incorporate an impeller into one or both rotors. Alternately, a separate impeller can be attached to a rotor. The pumps can be contained in housings without seals as the rotors need not be mechanically attached.

Abstract: An electronic pump selector system uses a programmable processor to select one of a plurality of pumps to be energized in response to an appropriate feedback signal from the selected pump. A current limited feedback circuit is incorporated which provides a varying voltage in response to a level switch associated with a selected pump indicating a high fluid level. In response to the voltage feedback signal, the selected pump is energized for a predetermined period of time. Subsequently, another pump is selected. The next selected pump is energized also for a predetermined period of time in response to a varying voltage feedback signal therefrom. The next pump is then selected and the sequence continued.