Example systems and methods for manipulating control of sump pumps in order to extend lifespans of the sump pumps are disclosed. An example method includes activating a sump pump a first time; deactivating the sump pump when a first current water level in a sump basin in which the sump pump is disposed reaches a first low-water mark; and determining, by one or more processors, a time since a last activation of the sump pump wherein the last activation occurred when the sump pump activated the first time. When the time satisfies a threshold, the method activates the sump pump at second time, determines, by one or more processors, a second current water level in the sump basin, and in response to determining that the second current water level in the sump basin is below a second low-water mark corresponding to a bottom of an impeller of the sump pump, deactivates the sump pump.

Methods and systems for detecting and correcting improper operation of a compressor in a refrigeration system and/or an HVAC system include a component level detection and prevention and a system level detection and prevention. The system level detection and prevention can be a backup or a confirmation of the component level detection and prevention. The component level detection and prevention can detect and prevent improper compressor operation within a predetermined time so that the compressor's operation period in an improper direction can be minimized, thereby minimizing wear and damage to the compressor.

A electric oil pump control method according to an embodiment of the present invention comprises the steps of: receiving a speed command from a transmission control unit; controlling the electric oil pump through speed control according to the speed command; determining whether the power of the electric oil pump is equal to or less than a reference power; controlling the electric oil pump through static power control, when the power of the electric oil pump is equal to or less than the reference power; determining whether a difference between the speed of the speed command and the speed of the electric oil pump is within a first range; and controlling the electric oil pump through the speed control when a difference between the speed of the speed command and the speed of the electric oil pump is within a first range.

A motor control device includes: a rotation control determination unit configured to determine whether a motor rotation control to rotate the motor fails; a parameter calculation unit configured to calculate a control failure frequency parameter having a correlation with a frequency of failure in the motor rotation control based on a determination result by the rotation control determination unit; an abnormality determination unit configured to determine whether an abnormality has occurred in the motor based on the control failure frequency parameter; and a stop suppression unit configured to suppress stop of rotation of the motor by changing a motor control parameter to perform the motor rotation control when the abnormality determination unit determines that an abnormality has occurred in the motor.

The invention relates to a pump device having a pump (8) and an energy supply device (5, 18), wherein the pump has a conveying element (9, 11) which conveys a fluid by means of supplied energy, wherein the pump has a transport state and an operating state, and wherein at least one first element (9, 9a, 10, 10, 11) of the pump has a different shape and/or size in the transport state than in the operating state. The operating safety of such a pump device is increased by a detection device (12, 20, 21, 22, 23, 24, 25, 27, 28, 29) which detects whether at least the first element is in the operating state with respect to shape and/or size by means of a sensor.

In accordance with one aspect, the present disclosure provides for systems and methods for controlling a pumping system for at least one aquatic application. The pumping system can include a pump, a motor coupled to the pump, an interface associated with the pump designed to receive input instructions from a user, and a controller in communication with the motor. The controller determines a blockage condition based on a power consumption value of the motor, and can further include an auto-restart function that is designed to allow the pump to automatically restart after detection of the blockage.

A method for controlling a pump arrangement comprising a pump having a motor and a control unit. The motor, when the pump is in an active state and the motor is driven in a first direction, is associated with a load factor that corresponds to an operating condition of the pump arrangement. The pump arrangement also includes a unit configured to monitor at least one operating parameter from which the load factor of the motor can be derived. The method includes determining a real value of the at least one operating parameter, determining if an externally applied force is acting on the motor to such an extent that an operating condition detrimental to the pump arrangement is initiated, effecting a state shift from the active state to an inactive state of the pump if an operating condition detrimental to the pump arrangement is initiated, the state shift including a step according to which the control unit, immediately after a detrimental operating condition is initiated, abruptly breaks the driving of the motor in the first direction.

A system and method for operating centrifugal pumps related to net positive suction head (NPSH), including identifying a group of centrifugal pumps and deriving an equation for the group based on manufacturer data of the centrifugal pumps collectively in the group, the equation correlating NPSH required (NPSHr) with flowrate of pumped fluid, wherein the manufacturer data includes NPSHr for each centrifugal pump of the group as a function of the flowrate of the pumped fluid. The technique includes specifying a NPSH margin for NPSH available (NPSHa) above the NPSHr.

A method for controlling a pump arrangement upon clogging. The arrangement includes a pump and a control unit. The pump includes a motor, and the control unit drives the motor. The motor during operation is associated with an operational parameter from which the motor torque may be derived. The operational parameter has a normal value P.sub.N during normal operation of the motor in a first direction. The method includes the steps of driving the motor in a first direction by the control unit, stopping the motor if a real value P of the operational parameter exceeds a predetermined clogging limit P.sub.I, driving the motor in an opposite second direction a predetermined flushing time T.sub.R by the control unit, and stopping the motor if the absolute value of the real value P of the operational parameter during the flushing time T.sub.R exceeds the absolute value of a first unfastening limit P.sub.L1.

A sump pump system may detect and utilize motion or acceleration of water in sump basins when implementing control of sump pumps. To detect the motion or acceleration, the sump pump system may utilize a sensor that is configured to detect motion or acceleration, such as an accelerometer or gyroscope. The sump pump system may identify a water level in a sump basin based on the detected motion or acceleration, which may be compared to a reading or expected signal from the sump pump system's typical sensor (e.g., float switch) that is used to detect one or more water levels. In this manner, the sump pump system may detect a malfunctioning level sensor that is used by the pump to detect high-water and low-water marks at which the sump pump activates and deactivates, respectively.