562results about "Motor parameter" patented technology

The invention comprises a pumping apparatus, system and method for increasing the flow of the in a first direction to boost liquid flow and in a reverse second direction to remove blockages and / or self-clearing, with operation having an rotor / impeller that can use a shredder and / or shearing action utilizing blades for processing to pass solids, debris and other things to prevent clogging and / or self-cleaning of the unit.

The invention discloses a cooling system, method and device of a wind generating set, and relates to the technical field of wind power generation. The cooling system comprises a cooling loop, the cooling loop comprises a cooling pump station, a cooling medium, a connecting assembly and a plurality of cooling branches connected in parallel, the connecting assembly communicates between the cooling pump station and the cooling branches, the cooling pump station drives the cooling medium to circularly flow in the cooling loop, and each cooling branch comprises N heat exchange assemblies connected in series, n is an integer greater than or equal to 2; wherein the outlet of the cooling pump station is respectively connected with the inlet of each cooling branch, and the inlet of the cooling pump station is respectively connected with the outlet of each cooling branch. In other words, when the cooling system is designed, the heat exchange assemblies are connected in series, so that the number of parts can be reduced, the cost is reduced, and the economical efficiency is improved.

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.

An apparatus includes a power converter to convert incoming alternating current (AC) mains power into a direct current (DC) voltage. A linear AC pump of the apparatus has an arm that reciprocates linearly back and forth to move a pair of diaphragms to pressurize air that is output from the linear AC pump. The apparatus also includes a DC motor driver having an H-bridge that receives the DC voltage from the power converter as an input and that generates a square wave as an output that is coupled to the linear AC pump to drive the arm back and forth. The pressurized air from the linear AC pump is used to inflate one or more bladders of an air mattress, for example.

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.

Control circuitry outputs a pump command current corresponding to an actuator operation signal to pump equipment including at least one pump whose displacement increases in accordance with increase in the pump command current. The control circuitry: stores calibration data generated based on actual measurement data of the at least one pump, the actual measurement data indicating an actual relationship between the pump command current and the displacement of the at least one pump, the calibration data being data to correct the pump command current such that the displacement of the at least one pump transitions on a performance line that is preset for the actuator operation signal. The control circuitry: determines the pump command current based on the actuator operation signal; and corrects the determined pump command current by using the calibration data, and outputs the corrected pump command current to the pump equipment.

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 variable speed pumping system coupled to a fluid circuit of an aquatic application is provided. The system includes a motor, a variable speed drive in electrical communication with the motor, and a housing designed to substantially enclose the motor and the variable speed drive. The housing includes a drive cover extending over the variable speed drive and an end cover. A controller is configured to provide control of the variable speed drive. An electrical communication assembly is in communication with the controller and contained underneath the end cover. The electrical communication assembly includes an RS-485 terminal block, and a selectively removable IO expansion module sized and shaped to be received into a receptable of the drive cover. The IO expansion module has a module cover and a module circuit board, and the module circuit board includes a plurality of relay terminal blocks and a plurality of digital input terminals.

The embodiment of the present application provides a control method, a hybrid power system and a controller for a hybrid power system. The hybrid power system includes a through-shaft gear pump, the through-shaft gear pump includes a first input end and a second input end, the first input end is connected to the first branch, and the second input end is connected to the second branch. The method includes: when the first input end of the through-shaft gear pump is connected to the first branch, the first output torque of the engine and the remaining power of the power battery are obtained in real time; when the first output torque and the remaining power meet the first preset condition, the second input end of the through-shaft gear pump is controlled to be connected to the second branch; the second output torque of the motor is adjusted to change the first output torque to improve the fuel consumption rate of the engine. The present invention realizes flexible matching of motor models, effectively reduces costs, and realizes two-way power transmission from the engine and the motor to the through-shaft gear pump by introducing a through-shaft gear pump including two input ends.

The invention relates to a method for determining a blocked rotor during injection-signal-based sensorless operation of a synchronous machine, comprising the following steps: Applying a three-phase alternating voltage, which includes an injection signal, to stator windings of the synchronous machine according to an estimated rotation angle φ est ; Detect a three-phase current flowing in the stator windings in response to the application of the alternating voltage; Transform the detected current into a first current vector that corresponds to a first angle φ est +45° in a dq coordinate system, and a second current vector corresponding to a second angle φ est-45° in a dq coordinate system; determining the contributions of the injection signal to the lengths of the first and second current vectors; determining the difference between these contributions as an error signal; and determining the amplitude of the error signal. The method also includes the following steps: comparing the amplitude of the error signal with a predetermined threshold; and determining the blocked rotor if the amplitude of the error signal exceeds the predetermined threshold.

Various cleaning devices with fluid tank empty detection and methods related thereto are provided. In general, a cleaning device can be configured to determine whether a fluid container is empty using an electromotive force (EMF) at a fluid pump configured to pump fluid from the fluid container. When the fluid container becomes empty, fluid cannot be supplied from the cleaning device to a surface until more fluid is added to the fluid container. Thus, by determining whether the fluid container is empty, a user of the cleaning device may be made aware when the fluid container becomes empty and needs refilling (or replacement).

The invention provides a frequency converter for a locomotive, a locomotive braking system and a control method thereof, and relates to the technical field of rail transit. The locomotive comprises a main air reservoir and a motor, the frequency converter for the locomotive comprises a pressure sensor, a control board card and a motor controller, and the pressure sensor at least partially extends into the main air reservoir and detects the pressure value in the main air reservoir; the control board card is connected with the pressure sensor, and the control board card can receive the pressure value and compare the pressure value with a pressure target value to form a comparison result; the control board card can send a control instruction according to the comparison result; the input end of the motor controller is connected with the control board card, the output end of the motor controller is connected with the motor, and the motor controller can receive the control instruction and adjust the output voltage and frequency of the motor controller according to the control instruction so as to control the rotating speed of the motor. The frequency converter for the locomotive can accurately control the pressure of the main air cylinder and improve the response speed and the stability of a brake system.

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.

A centrifuge system includes a centrifuge and a feed line fluidly connected to centrifuge with the centrifuge driven by a hydraulic system. The hydraulic system includes an electric motor driving a hydraulic pump connected to a fluid reservoir with the hydraulic pump providing hydraulic fluid to one or more hydraulic motors which in turn rotate the centrifuge. The system includes a pressure sensor for measuring fluid pressure and a speed sensor for measuring the rotational speed of the centrifuge. A controller can be in communication with the hydraulic system and the sensors and can receive measurements from the sensors and adjust the pressure of hydraulic fluid flowing to the one or more hydraulic motors to maintain a rotational speed of the centrifuge based on differing loads. The system can include one or more valves, controlled by the controller, which can also adjust the hydraulic pressure of the system.

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.

The invention relates to a method for determining an optimal rotational speed of a pressure medium supply device (10) of an electro-hydraulic system, which has an electric drive (4) and a hydraulic pump (2) coupled to it, which delivers pressure medium, wherein the electric drive (4) drives the hydraulic pump (2) according to a rotational speed and wherein the hydraulic pump has an adjustable displacement, wherein a minimum rotational speed value is determined based on a target volume flow rate (54) of the pressure medium requested by the pressure medium supply device (10) (110); wherein several comparative rotational speed values ​​are determined (120) such that a smallest of the several comparative rotational speed values ​​is equal to or greater than the minimum rotational speed value and a largest of the several comparative rotational speed values ​​is equal to or less than a predetermined maximum rotational speed value;wherein for at least some of the several comparative speed values ​​a comparative value corresponding to the respective comparative speed value is calculated using a cost function (190) which includes a sum (180) of at least one speed-dependent power loss term of the electric drive (4) and a speed-dependent power loss term of the hydraulic pump (2); and wherein the comparative speed value which has the smallest comparative value is determined as the optimal speed value (210).;

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.

A method (V) and a device (10) for controlling a flow-generating device (11), in particular a compressor (12), are provided. During operation of the flow-generating device (11), a vibration and / or oscillation is generated, which is detected by at least one sensor (22, 23) and described by at least one sensor signal (S1, S2). In a control device (16, 19), a relationship (F) between input parameters (PIN) and at least one control parameter (CO) is determined based on the at least one sensor signal (S1, S2) and a current operating point (AP) of the flow-generating device (11). The relationship (F) can, for example, be a parameter matrix (MX) or any other mathematical and / or logical structure that links the input parameters (PIN) with the at least one control parameter (CO), for example, an adaptive or machine-learning-modifiable logical structure.This allows for the consideration of changing circumstances, in particular aging effects. The at least one control parameter (CO) determined based on the relationship (F) is used for the control of the flow-generating device (11), in particular an electric motor (13).

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.

Method for conveying a fluid (6) of a fluid circuit (4) with an electric motor fluid pump (10) of a motor vehicle, - in which the fluid pump (10) and the fluid circuit (4) are part of a motor vehicle manual transmission, - in which a controller (22) of the fluid circuit (4) is coupled to a pump controller (28) of the fluid pump (10) via signal technology, - in which the pump controller (28) performs pressure control for the fluid circuit (4) by means of the fluid pump (10), in which a) an actual pressure (p ist ) of the fluid (6) is determined without a pressure sensor by the pump controller (28) based on operating parameters of the fluid pump (10), b) operating parameters of the fluid circuit (4) that are not related to the fluid pump are transmitted from the controller (22) to the pump controller (28), c) a target pressure (p soll) is predicted by the pump controller (28) and compared by evaluating the operating parameters transmitted by the controller (22), and d) the actual pressure (p ist ) to the target pressure (p soll ) is regulated.

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