Abstract: A pump control system includes a controller coupled to first and second pressure sensors. The sensors couple serial pressure related information to the controller. The controller can evaluate respective liquid levels, in response to received pressure related information from the sensors. A current sensor coupled to the controller can provide signals indicative of operation of one or more pumps coupled to the controller. The controller includes circuits to detect the presence of predetermined, prioritized, faults and to emit a wired or wireless fault indicator in response thereto.

Abstract: A pump control unit incorporates an accelerometer as a sensor. Responsive to outputs from the sensor, electrical load driving signals can be provided to energize a pump motor to reduce a fluid level in an enclosure.

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: A pump control system includes a plurality of different variable speed pumps. Each of the pumps can be operated at a different speed to equalize pump loads. A system wide proportional integral differential control loop increases and decreases the speed of all pump motors to maintain a desired system output pressure. A second proportional integral differential control loop associated with each pump adjusts pump speed to equalize a load profile for each respective pump.

Abstract: A wireless pump on/off system incorporates a radio receiver and an antenna. An RFID tag is carried on a float. The float can be located in a fluid whose level is to be controlled with at least a portion thereof protruding above the fluid level. Signal strength of a wireless received from the tag can be indicative of at least one fluid level, and responsive thereto a pump can be activated. The pump can be deactivated in response to another received wireless signal, loss of the activating signal indicative of another fluid level or expiration of a preset time interval.

Abstract: A pump control system includes a controller coupled to first and second pressure sensors. The sensors couple serial pressure related information to the controller. The controller can evaluate respective liquid levels, in response to received pressure related information from the sensors. A current sensor coupled to the controller can provide signals indicative of operation of one or more pumps coupled to the controller. The controller includes circuits to detect the presence of predetermined faults and to emit an audible fault indicator in response thereto.

Abstract: An axial flow pump includes a perforated impeller through which fluid being pumped flows. The pump can carry a stator which can interact with magnetic elements rotatably carried with the impeller to produce rotation thereof.

Abstract: A pump control system incorporates one or more solid state level sensors as well as solid state pump control switches. Elimination of mechanical or electrode-mechanical parts by using ultrasonically based fluid level sensors as well as solid state switches for motor control enhances reliability and results in reduced power consumption and dissipation.

Abstract: A backup pump control unit can incorporate ports to receive rechargeable batteries such as lithium ion, nickel cadmium or nickel metal hydride batteries. Multiple units can be coupled together to increase the available, stored electrical energy. In the absence of AC-type input power, the batteries can energize a backup pump.

Abstract: A control switch incorporates a solid state transducer, a strain gauge. The transducer responds to a local environmental condition, such as fluid level, or pressure and exhibits a parameter change which can be detected as an electrical output. Control circuits coupled to the transducer can sense the parameter change and switch a source of electrical energy to a load in response thereto.

Abstract: A single pump control unit can be coupled to first and second float switches and a pump for purposes of removing fluid from a region such as a sump. A supplemental set of contacts can be provided to couple an alarm indicating signal to a remote alarm. An alarm state can also be transmitted wirelessly.

Abstract: An uninterruptible power supply system senses quality of available three phase input power and determines if load requirements can be met therefrom. If not, it drives an inverter to generate acceptable quality three phase AC to supply to the load. In this mode, the energy is obtained from a battery array. A solar panel can be used as a primary or a secondary source of input energy.

Abstract: A microprocessor based flow meter establishes a series of pump on and off time intervals. Using previously entered flow rate information, the meter establishes quantities of flow during each pumping cycle or totals for predetermined time intervals such as days or weeks. Quantities of flow can be displayed on a per cycle basis or can be accumulated based on predetermined elapsed time intervals such as days or weeks.

Abstract: A control panel, which might be enclosed within an openable housing, can be movably supported on a pivotable support structure. The support structure which incorporates one or more pivot points facilitates movement of the control panel from a normal operational position to a displaced maintenance/service position the control panel can be moved both arcuately and linearly on the support element.

Abstract: A pump control system incorporates a programmed processor and respond to input from multiple floats. The programmed processor can respond to detected float failures in real time by reassigning control, lag, or lead functions from a failing float to one of the remaining functioning floats. Pump alternating functionality can be provided if any two of a plurality of four or more floats continue to function as expected.

Abstract: A processor controlled DC pump system charges back-up batteries using utility supplied AC power. In the absence of AC the batteries energize a DC load. When AC is restored, the processor regulates total output current to charge the batteries and energize the load without exceeding the maximum allowable total output current.

Abstract: A system and method for generating an AC power output signal from a DC power input signal. The system incorporates a DC-to-DC boost regulator including a plurality of boost stages coupled in series for receiving a DC input signal and producing a boosted DC power signal. The system further incorporates a DC-to-AC converter coupled to the transformerless DC-to-DC boost regulator, for receiving the boosted DC power signal and generating an AC power output signal. A control element is coupled to both the DC-to-DC boost regulator and the DC-to-AC converter. In at least one embodiment, the system and method for generating an AC power output signal from a DC power input signal are used in connection with an uninterruptible power supply.

Abstract: A pump control system incorporates a programmed processor and responds to input from multiple floats. The programmed processor can respond to detected float failures in real time by reassigning control, lag, or lead functions from a failing float to one of the remaining functioning floats. Pump alternating functionality can be provided if any two of a plurality of four or more floats continue to function as expected.

Abstract: A redundant, modular pump system includes a plurality of substantially identical pump modules. Each module includes constant speed drive circuitry, variable speed drive circuitry and a pump. Expansion is accomplished by adding modules. Reliability is enhanced by being able to operate each pump at constant or variable speed irrespective of whether other modules are being operated at different variable or constant speeds. A common, software driven control element activates drives and other devices in the modules to provide fluid on demand at a pre-selected pressure.

Abstract: A system and method for generating an AC power output signal from a DC power input signal. The system incorporates a transformerless DC-to-DC boost regulator including a plurality of boost stages coupled in series for receiving a DC input signal and producing a boosted DC power signal. The system further incorporates a DC-to-AC converter coupled to the transformerless DC-to-DC boost regulator, for receiving the boosted DC power signal and generating an AC power output signal. A control element is coupled to both the DC-to-DC boost regulator and the DC-to-AC converter. In at least one embodiment, the system and method for generating an AC power output signal from a DC power input signal are used in connection with an uninterruptible power supply.