Abstract:
An energy recovery apparatus, for use in a refrigeration system, comprises a first nozzle, a second nozzle, a turbine, a discharge port, and a housing. The first nozzle comprises a first passageway which is adapted to constitute a portion of a refrigerant flow path when the refrigeration system is operated in a first mode. The second nozzle comprises a second conduit which is adapted to constitute a portion of the flow path when the refrigeration system is operated in a second mode. The turbine is positioned to be driven by refrigerant discharged from either or both of the first and second passageways. The discharge port is adapted to permit refrigerant to flow out of the energy recovery apparatus. The discharge port of the energy recovery apparatus is downstream of the turbine. The turbine is within the housing.
Abstract:
A blower assembly including a blower housing having a side wall with a first portion extending from the initial cutoff through an angle of at least 45° or more, the first portion having a radius which is substantially constant or which increases at a relatively small rate. The side wall additionally includes a second portion, extending from the end of the first portion to the outlet, which forms a continuous curve with the first portion and has an increasing radius which is increasing at a larger rate and has a rate of increase that is also increasing with housing angle. The shape of the side wall allows a reduction in the overall size of the blower housing for a given size of impeller.
Abstract:
Systems, methods, and a voltage regulator are provided for tuning reactive droop compensation of a generator in a parallel power generation system. The voltage regulator is configured to compute a simulated droop compensation voltage for the generator and control an excitation signal to the generator based at least in part on the simulated droop compensation voltage.
Abstract:
A housing for enclosing electronics of a motor having an axis of rotation is provided. The housing includes an end cap having an outer surface and an inner surface. A control board is coupled to the inner surface, wherein the printed circuit board includes a first side, a second side and an edge located between the first side and the second side. The housing further includes a first circuit coupled to the first side which includes a plurality of first electrical components. Each first electrical component includes a tab extending beyond the edge. A second circuit is coupled to the second side and a fastener assembly is coupled to the tab and the inner surface.
Abstract:
Methods and systems of controlling the operation of a pump according to a pump operation schedule are described. In one constructions, a pump controller enters a programming mode and monitors a number of inputs received through a user interface while in the programming mode. The programming mode is then exited and a delay time is defined equal to one hour for each input received through the user interface while in the programming mode. A stored pump operation schedule is accessed and operation of the pump is initiated according to the pump operation schedule after a period of time equal to the delay time has elapsed since exiting the programming mode. Operation of the pump is again initiated according to the accessed pump operation schedule every twenty-four hours since the pump operation schedule was last initiated.
Abstract:
In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes a substantially cylindrical rotor core including an outer edge, an inner edge, and opposed first and second ends. The rotor further includes a first wall and a second wall defining at least one radial aperture extending radially through the rotor core. The rotor further includes at least one permanent magnet positioned within the at least one radial aperture. A first indentation is formed in one of the at least one permanent magnet and the first wall, the first indentation defining a first space between the at least one permanent magnet and the radial aperture first wall. The rotor further includes a first material positioned within the first space, the material configured to substantially prevent movement of the permanent magnet relative to the at least one radial aperture.
Abstract:
A pump system including a motor, a user-interface, and a controller. The user-interface having a single bar graph comprised of light-emitting diodes to provide visual feedback to an operator. The bar graph is used for programming purposes and for providing a motor speed and run duration status to the operator.
Abstract:
A motor controller is provided that includes an inverter configured to drive an electric motor, a rectifier configured to rectify an alternating current (AC) input current and to output the rectified AC input current to the inverter, and a controller coupled to the inverter. The controller is configured to improve a power factor of the motor controller by controlling the AC input current based on a direct current (DC) link voltage measurement.
Abstract:
An electric machine comprises a motor housing and an electronics enclosure coupled to the motor housing. The electronics enclosure defines an air passage between the electronics enclosure and the motor housing. The electronics enclosure further defines at least one air intake connected to said air passage. The electric machine also includes a fan configured to draw air through the at least one air intake and into the air passage.
Abstract:
A motor controller for an electric motor is described. The motor controller is coupled to a power line communication connection and includes a communication device coupled to a memory device. The motor controller is configured to receive, using the communication device, a status query from a server computing device via the power line communication connection. The motor controller is additionally configured to transmit electric motor diagnostic data from the memory device to the server computing device via the power line communication connection. The motor controller is further configured to receive motor configuration data from a client computing device wirelessly coupled to the motor controller. The motor configuration data is for controlling the electric motor. The motor controller is also configured to operate the electric motor in accordance with the motor configuration data.