A system for controlling a pump can include a fluid level sensor, a fuel level sensor, one or more oil pressure sensors, a pump fluid sensor, and a pump controller. The pump controller can provide speed instructions to a pump having an engine control unit, an engine, and a volute. The pump controller can include a user interface that includes a display and may also include a transceiver that is operatively engaged to a remote user device through a computer network. A method of controlling a pump can include characterizing the operation of the pump, performing a safety check of the pump, determining a level of a fluid in a tank, and providing the speed instructions to the pump.

Systems and methods for monitoring, detecting, and/or intervening with respect to cavitation and pulsation events during hydraulic fracturing operations may include a supervisory controller. The supervisory controller may be configured to receive pump signals indicative of one or more of pump discharge pressure, pump suction pressure, pump speed, or pump vibration associated with operation of the hydraulic fracturing pump. The supervisory controller also may be configured to receive blender signals indicative of one or more of blender flow rate or blender discharge pressure. Based on one or more of these signals, the supervisory controller may be configured to detect a cavitation event and/or a pulsation event. The supervisory controller may be configured to generate a cavitation notification signal indicative of detection of cavitation associated with operation of the hydraulic fracturing pump, and/or a pulsation notification signal indicative of detection of pulsation associated with operation of the hydraulic fracturing pump.

A multi-winding-motor driving system includes a motor and a power unit. The motor has multi-branch windings independent from each other. The power unit includes a rectifier unit and a plurality of inverter units, wherein the inverter units correspond to the multi-branch windings of the motor one to one, and each of the inverter units supplies power to corresponding one branch of the multi-branch windings of the motor.

An apparatus for monitoring rod rotation in a rod lift system. The apparatus comprises one or more sensors that reside on the rod string of the rod lift system. The sensor is configured via a processor to generate a signal indicative of radial position of the sensor relative to an external frame of reference. The signal may be sent to a wireless I/O module, with the signals being indicative of at least partial rotation or, alternatively, a lack of rotation, of the rod-string. The processor is configured to generate an alarm if an absence of rod rotation is detected while the rod lift system is running and transmit this signal to the nearby wireless I/O module. A method for monitoring a reciprocating rod lift system is also provided.

An appliance for making a beverage comprising: a conduit defining a liquid flow path for the liquid; a pump to move the liquid under pressure along the flow path and configured to operate in a first mode and a second mode, different to the first mode, a sensor assembly configured to determine a first flow rate of the liquid in the flow path when the pump operates in the first mode and determine a second flow rate when the pump operates in the second mode; and a controller operatively coupled with the pump and the sensor assembly and configured to cause the pump to switch from the first mode to the second mode if the first flow rate is below a first threshold and to cause the pump to switch from the second mode to the first mode if the second flow rate is above a second threshold. In the second mode, the pump causes the liquid to move under increased pressure than in the first mode to at least aid in resolving cavitation. A method of controlling the appliance to make a beverage is also disclosed.

Aspects of the subject technology relate to systems and methods for optimizing multi-unit pumping operations at a well site. Systems and methods are provided for receiving sensor data from a hydraulic fracturing fleet equipment at an equipment system, designating an event as being flagged based on the sensor data from the hydraulic fracturing fleet equipment, determining a physical action based on the flagged event and a priority list of actions, and providing instructions to a first pump of the hydraulic fracturing fleet equipment to perform the physical action based on the flagged event and the priority list of actions.

Systems and methods for monitoring, detecting, and/or intervening with respect to cavitation and pulsation events during hydraulic fracturing operations may include a supervisory controller. The supervisory controller may be configured to receive pump signals indicative of one or more of pump discharge pressure, pump suction pressure, pump speed, or pump vibration associated with operation of the hydraulic fracturing pump. The supervisory controller also may be configured to receive blender signals indicative of one or more of blender flow rate or blender discharge pressure. Based on one or more of these signals, the supervisory controller may be configured to detect a cavitation event and/or a pulsation event. The supervisory controller may be configured to generate a cavitation notification signal indicative of detection of cavitation associated with operation of the hydraulic fracturing pump, and/or a pulsation notification signal indicative of detection of pulsation associated with operation of the hydraulic fracturing pump.

An air compressor includes: a motor; a compression mechanism that is driven by the motor and that is configured to generate compressed air; a tank that is configured to store the generated compressed air; a load acquisition part that is configured to acquire a load applied to the compression mechanism; and a control part that is configured to control a rotation of the motor. The control part is configured to perform control for changing a TN characteristic of the motor in response to the load of the compression mechanism acquired by the load acquisition part.

Aspects are provided for pumps and methods and systems for controlling pumps based on a bubble sensor. A pump system includes a drive motor, a pump head that receives tubing, and a controller configured to control a rotation of the drive motor to move a liquid within the tubing from an inlet to an outlet. The bubble sensor is coupled to the tubing downstream from the outlet and configured to send a signal to the controller in response to presence of a gas bubble within the tubing. The controller is configured to: determine a quantity of bubbles detected based on the signal; determine an alert in response to the quantity of bubbles detected exceeding a threshold; and stop the drive motor after a safe operating time from the alert. The threshold and the safe operating time are based, at least in part, on a characteristic of the tubing.

Systems and methods for monitoring, detecting, and/or intervening with respect to cavitation and pulsation events during hydraulic fracturing operations may include a supervisory controller. The supervisory controller may be configured to receive pump signals indicative of one or more of pump discharge pressure, pump suction pressure, pump speed, or pump vibration associated with operation of the hydraulic fracturing pump. The supervisory controller also may be configured to receive blender signals indicative of one or more of blender flow rate or blender discharge pressure. Based on one or more of these signals, the supervisory controller may be configured to detect a cavitation event and/or a pulsation event. The supervisory controller may be configured to generate a cavitation notification signal indicative of detection of cavitation associated with operation of the hydraulic fracturing pump, and/or a pulsation notification signal indicative of detection of pulsation associated with operation of the hydraulic fracturing pump.