423results about "Motor parameter" patented technology

The invention provides a liquid pumping apparatus, system and method for increasing the flow of fluid in a gravity feed network. The invention provides an in-line main pipe with upstream and downstream portions flanking a manifold that houses a check valve. One or more branch pipes may form a fluid bypass around the manifold. Each branch pipe includes a pump configured to accelerate the fluid in at least partially the same direction as the downstream flow. A sensor may be adapted to measure a parameter related to the liquid level in the main pipe. A rotary encoder may be adapted to measure the flow rate in the main pipe as a proportional function of the check valve angle, under gravity flow conditions. A control system may energize the pumps when the liquid level in the main pipe is above a predetermined threshold according to the parameter.

A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.

The present invention provides an air compression pre-treatment system, comprising a dehumidification air duct: the dehumidification air duct is located upstream of the air compressor, the dehumidification air duct comprises a dehumidification wheel, a heat recovery module: the heat recovery module comprises a first regeneration air duct, a heat exchanger and the air compressor are connected in series upstream of the first regeneration air duct, and a regulating air duct: the regulating air duct and the dehumidification air duct constitute a circulation air duct, and when the air compressor is working in variable frequency, the air volume in the dehumidification air duct and the regulating air duct is dynamically balanced. The present invention reduces the air compressor suction temperature and humidity through the air compression pre-treatment system, changes the operating range of the air compressor, reduces operating energy consumption, reduces maintenance costs, reduces the investment cost of post-processing equipment, recovers the high-temperature exhaust heat of the air compressor as a regeneration heat source input, and controls and switches the regulating air duct, thereby reducing the operating energy consumption of the air compression pre-treatment system, making it more stable and energy-saving.

In a hydraulic drive system used for an electrically driven hydraulic work machine that drives a hydraulic pump by an electric motor and supplies a hydraulic fluid to plural actuators to carry out work, the power consumption of the hydraulic pump is kept from exceeding a value decided in advance. For this purpose, a controller calculates target power to be consumed by the hydraulic pump on the basis of the capacity of the hydraulic pump, the delivery pressure of the hydraulic pump sensed by a pressure sensor, and a target revolution speed of the electric motor, and limits the target revolution speed of the electric motor in such a manner that the target power falls within a range of the maximum allowable power.

A system and method for operating a fleet of pumps for a turbine driven fracturing pump system used in hydraulic fracturing is disclosed. A method of operating a fleet of pumps associated with a hydraulic fracturing system includes receiving a demand Hydraulic Horse Power (HHP) signal. The demand HHP signal may include the Horse Power (HP) required for the hydraulic fracturing system to operate and may include consideration for frictional and other losses. The method further includes operating all available pump units at a percentage of rating below Maximum Continuous Power (MCP) level, based on the demand HHP signal. Furthermore, the method may include receiving a signal for loss of power from one or more pump units. The method further includes operating one or more units at MCP level and operating one or more units at Maximum Intermittent Power (MIP) level to meet the demand HHP signal.

An electric compressor includes a control unit configured to control drive of a motor. The control unit executes: synchronous deceleration control that is performed on conditions that a stop command for the motor has been inputted from the outside and that the number of rotations of a rotor is equal to or less than a predetermined first number of rotations and is greater than a predetermined second number of rotations, and decreases the number of rotations under forced synchronous control based on a current having a predetermined target current value; and stop control that is performed on condition that the number of rotations has reached the second number of rotations under the synchronous deceleration control, and stops rotation of the rotor under braking control that controls drive of predetermined switching element IGBTs of a plurality of switching elements in such a manner as to apply a load to the motor.

A compressor for a commercial vehicle comprises:a plurality of cylinders, wherein each cylinder accommodates a reciprocating piston, wherein the reciprocating piston is driven by a crankshaft, anda plurality of cooling means, arranged at a cylinder head region of the cylinder, wherein one specific cooling means is assigned to one cylinder respectively.The compressor assembly comprises a sensor network, wherein the sensor network comprises a plurality of temperature sensitive switches, whereineach temperature sensitive switch is assigned to a cylinder.

A method for controlling a first reference temperature in a device (1) for compressing gas, the device (1) including an oil-injected element (2) for compressing the gas; an oil injection pipe network (6) for injecting oil into the oil-injected element (2), including: an apportioning means (8) for apportioning the oil into a first part and into a second part; an oil cooler (10) cooled by a fan (9), for cooling the first part; and a bypass (11) for diverting the second part past the oil cooler (10). An apportioning proportion of the first part is controlled to a required apportioning proportion, and subsequently a speed of the fan (9) is controlled to a required speed optionally on the basis of the apportioning proportion, wherein the apportioning proportion is controlled by a control unit (15) on the basis of a non-fuzzy logic algorithm.

The present disclosure relates to a mobile testing and / or calibration device and a method for testing and / or calibrating a hydraulic and / or electrical component at a location where the hydraulic and / or electrical component is used and / or under operating conditions of the hydraulic and / or electrical component. The mobile testing and / or calibration device comprises at least one first sensor unit for acquiring performance data of a hydraulic and / or electrical component to be tested and / or calibrated. Furthermore, at least one second sensor unit is provided for acquiring at least one testing and / or calibration parameter, wherein the testing and / or calibration parameter includes current parameters of the location and / or the operating conditions.In addition, at least one supply and / or control unit is provided for providing drive means and / or control parameters for the operation of the hydraulic and / or electrical component, and a computing unit for the automated testing and / or calibration of the hydraulic component during the operation of the hydraulic and / or electrical component based on the recorded performance data and the recorded test and / or calibration parameters.

The present invention is a piezoelectric actuator drive method, a piezoelectric actuator drive circuit, and a piezoelectric actuator drive system capable of causing a piezoelectric element to vibrate in a maximum amplitude state. The piezoelectric actuator drive circuit includes: an obtainment unit that obtains operation information pertaining to operation of the piezoelectric element in a period that is a part of one cycle of a drive cycle in which the piezoelectric element is driven; and a control unit that performs feedback control of a drive parameter for driving the piezoelectric element based on the operation information.

An example system includes a fluid end having a block, a fluid inlet formed in the block, and a fluid outlet formed in the block. The system also includes an intake manifold fluidly coupled to the fluid inlet, and a fluid conduit fluidly coupled to the fluid outlet and the intake manifold. The system further includes a valve fluidly coupled to the fluid conduit, the valve configured to control fluid flow through the fluid conduit, an actuator coupled to the valve and configured to position the valve in an open position or a closed position, and a controller communicatively coupled to the actuator and configured to send one or more signals to the actuator, causing the actuator to position the valve in the open position or the closed position.

A case for an electronic cigarette vaporiser, the case including an automatic lifting mechanism that lifts the vaporiser up a few mm from the case to enable a user to easily grasp the vaporiser and withdraw it from the case. The lifting mechanism can be spring-based. The case both re-fills the vaporiser with liquid and also re-charges a battery in the vaporiser.

Systems and methods provided herein relate to optimization of the motor of a pump system. Voltage-frequency ratios are adjusted while maintaining pumps speed in a systematic manner to lower power usage. Oscillations of the motor speed are detected, and voltage-frequency ratios adjusted to maintain low levels of oscillations while lowering power usage. Savings resulting in the optimization of the pump system are estimated.

Apparatus and associated methods relate to using an electro-hydraulic solenoid valve to provide regulation of fluid displacement of a variable-displacement hydraulic pump. A mechanical control mechanism is configured to control displacement of hydraulic fluid pumped from a hydraulic input port to a hydraulic output port. The electro-hydraulic solenoid valve regulates fluid conductivity between a hydraulic output port of the variable-displacement hydraulic pump and a hydraulic control cylinder, which operates a hydraulic control piston coupled to the mechanical control mechanism controlling fluid displacement. An electronic control unit is configured to generate and transmit an electrical control signal to the electro-hydraulic solenoid valve in response to a metric of the variable-displacement hydraulic pump as measured by a transducer. The electronic control unit generates the electrical control signal so as to control the metric measured to within a predetermined control band about a target value.

An implantable blood pump system is disclosed herein. The implantable blood pump system includes an implantable blood pump, a controller coupled to the blood pump, a connector receptacle, and a connector insert. The connector receptacle can include a plurality of contacts, and a following surface. The connector insert can be received within the connector receptacle to couple a plurality of insert contacts with the plurality of contacts of the connector receptacle. The connector insert can include walls defining a follower receptacle that can receive a portion of the following surface when the connector insert is in a desired alignment with respect to the connector receptacle, and a cam surface that can engage with the following surface to bias the connector insert to the desired alignment with respect to the connector receptacle when the connector insert is inserted into the connector receptacle.

Actuation of a hydraulic device that provides a hydraulic supply to a torque-transmitting device is provided. An electrically operated pump is operated in a first operating state. The first operating state has a primary pump rotational speed that provides a first fluid pressure to the torque-transmitting device via a fluid tract. A switchover process is initiated to operate the electrically operated pump device in a second operating state based on a second fluid pressure and a second fluid target pressure. The second operating state has a secondary pump rotational speed that provides the second fluid pressure to the torque-transmitting device via the fluid tract. During operation of the hydraulic device, the secondary pump rotational speed for the switchover process is determined based on a first power value. The first power value includes electrical pump power of the pump device in a preceding switchover process.

To provide a fluid pumping system effective for reducing the frequency of maintenance.SOLUTION: A fluid pumping system 1 comprises: multiple pumping devices 10 for pumping a fluid; a deterioration level estimation unit 115 to estimate a deterioration level of one of the pumping devices 10 based on information about a driving force of the one pumping device 10; a selection unit 215 to select at least one pumping device 10 from the multiple pumping devices 10 based on the deterioration levels estimated by the deterioration level estimation unit 115; and a pumping control unit 216 to cause the pumping device 10 selected by the selection unit 215 to pump the fluid.SELECTED DRAWING: Figure 2

A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.

A method for controlling a first reference temperature in a device (1) for compressing gas, the device (1) comprising: - an oil-injected element (2) for compressing the gas; - an oil injection pipe network (6) for injecting oil into the oil-injected element (2), comprising: - an apportioning means (8) for apportioning the oil into a first part and into a second part; - an oil cooler (10) cooled by a fan (9), for cooling the first part; and - a bypass (11) for diverting the second part past the oil cooler (10), wherein firstly an apportioning proportion of the first part is controlled to a required apportioning proportion, and wherein subsequently a speed of the fan (9) is controlled to a required speed optionally on the basis of the apportioning proportion, characterized in that the apportioning proportion is controlled by a control unit (15) on the basis of a non-fuzzy logic algorithm.

The invention relates to a method for operating an electric motor operatively connected to a compressor in a substantially noiseless and vibrationless manner, the method comprising the steps of providing a desired speed range of the electric motor, operating the electric motor at a plurality of selected speeds within the desired speed range, determining a set of electric motor correlation values for each selected speed, processing the determined set of electric motor correlation values for each selected electric motor speed, and operating the electric motor at the speed or within the speed range in dependence of the processing of the determined set of electric motor correlation values. The invention further relates to a drive system configured for operating an electric motor operatively connected to a compressor in a substantially noiseless and vibrationless manner. The invention further relates to a method for monitoring an electric motor operatively connected to a compressor, the method comprising the steps of comparing a predefined set of electric motor correlation values with a determined set of electric motor correlation values, and controlling the electric motor in accordance with a predetermined schedule in case a deviation between the determined set of electric motor correlation values and the predefined set of electric motor correlation values exceeds an amount.

A method for controlling a first reference temperature in an apparatus (1) for compressing a gas, the apparatus (1) comprising: an oil-injected element (2) for compressing the gas; and an oil injection pipe network (6) for injecting oil into the oil-injected element (2); the oil injection pipe network (6) comprising distribution means (8) for distributing oil to a first part and a second part; an oil cooler (10) cooled by a fan (9) for cooling the first part; and a bypass (11) for bypassing the second part over the oil cooler (10); wherein first a distribution rate of the first part is controlled to a required distribution rate, and then a speed of the fan (9) is controlled to a required speed, optionally based on the distribution rate, the distribution rate being controlled by a control unit (15) based on a non-fuzzy logic algorithm.

The disclosure provides a controller and server combination, which implements a set of software programs to control a booster pump system. In a preferred embodiment, the software derives quadratic models for the pump performance curves, and the system curve. The system monitors the flow rate of the system, the pump performance curve model and the system curve model to adjust the drive frequency and the number of active pumps to meet flow rate demand efficiency.

Provided is a refrigeration cycle device which makes it possible to inhibit a working medium disproportionation reaction. This refrigeration cycle device is equipped with a control device (3) for controlling a compressor (4) equipped with: a sealed container (40) which constitutes a channel for a working medium (20) which contains an ethylene-based fluoro-olefin as a coolant component; and a compressor mechanism (41) and an electric motor (42) which are positioned inside the sealed container (40). This control device (3) has a drive circuit (31) and a control circuit (32). The drive circuit (31) has: a converter circuit (311) which has a first output point (P1) which outputs a first voltage, a second output point (P2) which outputs a second voltage which is lower than the first voltage, and a third output point (P3) which outputs a third voltage which is between the first and second voltages; and an inverter circuit (312) which includes first through third semiconductor switching element groups which are respectively connected between the first through third output points (P1, P2, P3) and the electric motor (42). The control circuit (32) executes a PWM control for the first through third semiconductor switching element groups in a manner such that the drive circuit (31) operates the electric motor (42).

Methods of pumping fluids and fluid pumping devices and systems are disclosed herein. Systems described herein include an adjustable pump configured to discharge fluid at a plurality of flow rates. The system includes at least one current measurement device communicatively coupled to the pump and configured to measure a current applied to the pump. The system includes a controller communicatively coupled to the pump and the at least one current measurement device. The controller is configured to adjust an operating parameter of the pump based at least in part on a current measurement measured by the at least one current measurement device.

The present invention relates to a pump-operation support method and a pump-operation support apparatus. The pump-operation support method includes: a performance-characteristic acquisition process of acquiring a flow-rate vs. total-pump-head typical performance curve in a rated operation and a rated rotational speed as performance characteristics of a support target device identified by the model number of a pump device; an installation-state acquisition process of acquiring an actual pump head as an installation state of the support target device; an operation-state acquisition process of acquiring operating frequency, suction pressure, and discharge pressure as an operation state of the support target device; and a first operation support process of calculating operating conditions in a reference operation of the support target device when the support target device is operated in the installation state and the operation state, wherein the first operation support process includes calculating flow rate and total pump head in the reference operation based on the performance characteristics, the installation state, and the operation state.

An oilfield pressure pumping system is configured to perform a preliminary' fracturing stage or operation at a high pressure but slow speed before initiating normal fracturing. The oilfield pressure pumping system includes an auxiliary underdrive system that can drive the transmission at a slower input speed that can be provided by an idle speed of the power unit's engine to facilitate different fracturing modes, including a preliminary fracturing mode during a slow speed / high pressure preliminary fracturing stage. The auxiliary underdrive system may include a hydrostatic transmission driven by the engine and which, drives the transmission at an underdrive speed that would correspond to a sub-idle engine speed driving the transmission.

Disclosed herein are embodiments of a method for determining operational information of a metering pump, the metering pump comprising a dosing chamber, a displacement member and a drive motor for driving the displacement member, wherein the method comprises: receiving a plurality of detected values of an indicator quantity indicative of a strength of activation of the displacement member at respective positions of the displacement member during operation of the metering pump; computing the operational information from a machine-learning model trained to output said operational information responsive to receiving a plurality of input values derived from detected values of the indicator quantity.

A gas compressor includes a gas compressor machine body, a motor to drive the body, a temperature sensor (108, 109) for measuring the body's temperature, and a cooling fan (106) on a shaft (103) transmitting power to the body. A control unit (110) manages the gas compressor. This control unit (110) adjusts a temperature threshold value in response to the frequency of the input to the motor. It issues a notification if the temperature measured by the sensor (108, 109) surpasses this threshold. Notably, the temperature threshold value set when the motor input frequency is high is equal to or lower than the threshold value set when the motor input frequency is low.

A method for evaluating one or more properties of a wellbore. The method may include identifying a total power from all electric pump motors being used in a fracture operation, gradually reduce pump rates for one or more of the electric pump motors except for one or more selected electric pump motors. The method may further include gradually reduce the pump rate of the selected pump motors and stabilizing the pressure by holding the selected pump motors at a constant rate.

The embodiment of the invention discloses a blood pump remaining available time prediction method and device of a centrifugal pump, computer equipment and a storage medium, and relates to the technical field of medical instrument monitoring. The method comprises the steps that the periodic abrasion loss of a single ball bearing in a monitoring period is obtained; based on the cycle abrasion loss of the monitoring cycle and the historical cycle abrasion loss of a historical monitoring cycle before the monitoring cycle, the current total abrasion loss of the single ball bearing is determined; based on the total abrasion loss and a preset total abrasion loss threshold value, the remaining available abrasion loss of the blood pump is determined; according to the method, the initial estimated available time of the blood pump is determined on the basis of the remaining available wear loss, the periodic wear loss and the duration of the monitoring period, filtering processing is further carried out on the basis of the calculated initial estimated available time, the estimated available time of the blood pump is determined, and therefore the remaining available time of the blood pump can be accurately predicted. Therefore, on one hand, the safety is ensured, and on the other hand, the waste of consumables is avoided.