Matches 1 - 50 out of 83 1 2 >


Match Document Document Title
US20140314582 Flow Control  
A pumping system for moving water of a swimming pool includes a water pump and a variable speed motor. The pumping system further includes means for determining a first motor speed of the motor,...
US20110076156 Flow Control  
A pumping system for moving water of a swimming pool includes a water pump and a variable speed motor. The pumping system further includes means for determining a first motor speed of the motor,...
US20140227104 HYDRAULIC DRIVE SYSTEM FOR ELECTRICALLY-OPERATED HYDRAULIC WORK MACHINE  
An electrically-operated hydraulic work machine drives an actuator with a hydraulic pump driven by an electric motor and exercises load sensing control by controlling the rotation speed of the...
US20150211537 Pump System with Automated Testing  
A pump system is provided. The pump system includes a power source, a pump and a transmission. A first sensor is configured to provide information indicative of at least one first operating...
US20120055484 Ventilator  
A ventilator which includes: at least one pair of reciprocating opposed gas moving means, the internal volume of which is arranged to be reduced and enlarged by a balanced drive, said gas moving...
US20110200451 TEST CONTROLLER FOR A ROTARY PUMP  
A test controller and method to operate a rotary motor of a pump are provided. The test controller includes a test speed circuit electrically coupled to, but detachable from, the pump and being...
US20130280099 FAN ASSEMBLY  
A fan assembly comprising an air inlet, at least one air outlet, an impeller, a motor for rotating the impeller to draw air through the air inlet, at least one heater assembly, and a user...
US20140294601 ACTIVE ADAPTIVE HYDRAULIC RIPPLE CANCELLATION ALGORITHM AND SYSTEM  
Hydraulic pumps/motors are used to convert between rotational motion/power and fluid motion/power. Pressure differential is achieved across the pump/motor by applying torque to either aid or...
US20050180856 Drive technology for peristaltic and rotary pumps  
A method and system for controlling a rotary pump where a rotary pump can be coupled to a stepper motor, and the stepper motor can be controlled with micro- or nano-stepping accuracy using a...
US20050180857 Fluid circulation pump for heating and conditioning systems and the like  
The present invention relates to a method for measuring a parameter characteristic of a heating and/or conditioning system (1) equipped with a primary hydraulic circuit (6) and a secondary...
US20110176933 METHOD FOR DETERMINING THE FUNCTIONAL RELATION OF SEVERAL PUMPS  
A method for determining the functional relationship of several pumps which are controllable in their rotational speed, in a hydraulic installation. At least one pump is activated with a changed...
US20130330205 VARIABLE FLUID FLOW TECHNIQUES FOR MACHINE FLUID SYSTEMS  
Methods, systems, and techniques for structuring, operating, and/or controlling a variable fluid flow system of a machine are provided. In various embodiments, a supplemental pump and/or an...
US20120063921 Control Algorithm of Variable Speed Pumping System  
A pumping system includes a pump for moving water. In one aspect, this is in connection with performance of an operation. The system includes a variable speed motor operatively connected to drive...
US20130017097 ALARM CIRCUIT  
An alarm circuit includes a fan controller with a rotation speed control pin and a rotation speed detection pin, a first rectifying circuit connected to the rotation speed control pin, a switch...
US20130142669 SYSTEMS AND METHODS FOR CONTROLLING A VARIABLE SPEED WATER PUMP  
Systems and methods for providing an improved strategy for controlling a variable speed water pump in a vehicle. In some embodiments, more than one water pump speed function is calculated based on...
US20120244012 Apparatus for Controlling Electric Oil Pump  
The invention in one aspect, provides an apparatus for controlling an electric oil pump that can determine the occurrence of idling even in a region in which determination based on a load of the...
US20110052416 Variable Speed Pumping System and Method  
A variable speed pumping system and an associated method for moving water of an aquatic application. The variable speed pumping system includes a water pump for moving water in connection with...
US20110044823 Variable Speed Pumping System and Method  
A variable speed pumping system and an associated method for moving water of an aquatic application. The variable speed pumping system includes a water pump for moving water in connection with...
US20150219104 METHOD OF DETERMINING CIRCULATION STATE OF COOLING WATER  
A method of determining a state of cooling water is provided. The method includes operating, by a controller, a driving motor of a cooling water-circulating pump that is configured to circulate...
US20050084384 Smart fan and pump controller  
A pump or DC fan used to cool an electronic system is monitored for speed. When the pump or fan encounters an unexpected increase in impedance, such as an obstruction or a bearing anomaly, the...
US20150078917 SYSTEM AND METHOD FOR CONVERTERLESS OPERATION OF MOTOR-DRIVEN PUMPS  
A converterless motor-driven pump system includes an off-grid prime mover. The off-grid prime mover has a rotational driveshaft and operates in response to a throttle control command to control a...
US20150147188 High Volume Low Speed Fan Using Direct Drive Transverse Flux Motor  
Disclosed is a high volume low speed (HVLS) fan that is designed to circulate air in large buildings for cooling, heating, and ventilation. A fan with a diameter between 8 to 24 feet consisting of...
US20120230839 HVAC BLOWER MOTOR WITH SPEED SENSOR  
An HVAC system includes a heating/cooling element; an electric motor; a speed sensor; and a control device. The heating/cooling element may include a heating element, and/or a cooling element, and...
US20050095140 Rod saver speed control method and apparatus  
A motor speed controller (100) identifies the position of a pump rod (14). At one or more critical positions of the rod, the motor speed controller (100) adjusts the speed of the motor to change...
US20070196213 Metering pump with self-calibration and health prediction  
A metering pump incorporates a method of relating inner loop current to a pump output pressure. Pump/motor speed, which correlates to current, is measured and controlled by a system controller....
US20070160480 No water / dead head detection pump protection algorithm  
A method and apparatus are provided for controlling the operation of a pump, featuring steps of sensing a no water or dead head condition of the flow of the medium in the pump, and dynamically...
US20130115107 Calculating Downhole Pump Card With Iterations on Dual Damping Factors  
A pump apparatus has a downhole pump disposed in a wellbore and has a motor at the surface, and a rod string operatively moved by the motor reciprocates the downhole pump in the wellbore. Downhole...
US20110206539 FUEL SUPPLY SYSTEM  
A fuel supply system has an in-tank module. The in-tank module is provided with a pump, a filter, a pressure regulator and a pressure sensor detecting a fuel pressure. The pressure sensor is...
US20140072450 SYSTEM AND METHOD FOR DIAGNOSING A FAULT IN A SWITCHABLE WATER PUMP FOR AN ENGINE BASED ON A CHANGE IN CRANKSHAFT SPEED  
A system according to the principles of the present disclosure includes a pump control module and a pump diagnostic module. The pump control module commands a water pump to switch between on and...
US20140334941 PUMP APPARATUS  
Provided is a pump apparatus capable of improving the performance in a wide operation range from an operation area with a low pressure and a high flow rate to an operation area with a high...
US20060099094 Vacuum pumping arrangement and method of operating same  
A vacuum pumping arrangement (10) for controlling pressure in a chamber, the arrangement comprising a molecular pumping mechanism (12) and a backing pumping mechanism (14). The backing pumping...
US20130136623 SYSTEM FOR CONTROLLING AN ELECTRIC OIL PUMP  
A system for accurately and reliably controlling an electric oil pump includes a control portion adapted to control rotation speed of the motor of the electric oil pump, a regulator valve...
US20120156056 PUMP UNITS  
A pump unit includes a pump, a motor configured to drive the pump, a control device communicating with the motor and a pressure detection device configured to detect a pressure of a fluid...
US20140341751 CONTROL DEVICE FOR A RADIATOR FAN, RADIATOR FAN ARRANGEMENT AND METHOD  
The present invention relates to a control device for a radiator fan, in particular for a radiator fan of a motor vehicle, having an external control device which is designed to generate a...
US20150139815 OIL PRESSURE CONTROL DEVICE  
An oil pressure control device for supplying oil pressure by rotating a hydraulic pump, by means of a motor, comprises an oil pressure sensor; a speed instruction operation unit for outputting a...
US20060099084 Electric blower  
The present invention provides an electric blower that performs: measuring an amount of airflow against a fan rotation speed of the blower with a load magnitude detected previously; determining an...
US20060039807 Electrically powered compressor  
A compressor includes a motor driven by a controller and having a rotor and a stator, a compressing unit driven by the motor in a hermetic container in which refrigerant is filled. Driving the...
US20070183902 ANTI-ENTRAPMENT AND ANTI-DEAD HEAD FUNCTION  
A pumping system includes a water pump for moving water. The pumping system includes means for determining a value indicative of a blockage that inhibits the movement of water through the pumping...
US20070212230 Method for optimizing valve position and pump speed in a PID control valve system without the use of external signals  
The present invention provides an algorithm that utilizes flow reference data which can be mathematically determined as a function of various pump and motor parameters such as speed, torque or...
US20060067837 Vehicle air conditioner in which shaft seal is protected  
An object of the present invention is to protect a shaft seal of a variable displacement compressor of an air conditioner for a vehicle by the control thereof. The air conditioner for a vehicle...
US20060045750 Variable speed pumping system and method  
A variable speed pumping system and an associated method for moving water of an aquatic application. The variable speed pumping system includes a water pump for moving water in connection with...
US20070212229 Method and apparatus for pump protection without the use of traditional sensors  
The present invention provides protection for centrifugal pumps while differentiating between dangerous operating conditions (e.g. dry running, minimum flow and runout) and/or conditions where...
US20090009967 Fan unit and electronic apparatus and method of controlling the same  
The inventors have revealed that the actual rotation speed of the rotor in a fan structured as a centrifugal fan exceeds the designated rotation speed if the ventilation opening of the centrifugal...
US20110293439 Cooling Fan Driving Device and Fan Rotational Speed Control Method  
The invention reduces waste of flow volume of pressurized oil discharged from a hydraulic pump when the rotational speed of a cooling fan is increased to the target rotational speed. The target...
US20150204322 PUMP SYSTEM HAVING SPEED-BASED CONTROL  
A pump system is disclosed. The pump system may have a power source, a pump, and a torque converter configured to fluidly couple an output rotation of the power source to an input rotation of the...
US20050214129 Medical infusion pump with closed loop stroke feedback system and method  
A medical pump with a closed loop stroke feedback system and method, for use with a pumping chamber, for example in a cassette, is disclosed. The pump includes a pumping element that...
US20080240930 Method and System for Optimizing Downhole Fluid Production  
A method and system for pumping unit with an elastic rod system is applied to maximize fluid production. The maximum stroke of the pump and the shortest cycle time are calculated based on all...
US20090232663 Compressor-Expander Set Critical Speed Avoidance  
A control method and apparatus for critical rotational speed avoidance in a compressor-expander set in a gas refrigeration system. By varying an opening of an antisurge or recycle valve, a shaft...
US20140255213 POWER SUPPLY CIRCUIT  
A power supply circuit includes a connector for a fan, a speed adjusting circuit, a speed feedback circuit, a control module, first and second power sources, and a switching module. The speed...
US20120269652 CONTROL METHOD OF FAN ROTATION SPEED  
A control method of a fan rotation speed, which controls the operation of a fan set including fans connected in series, is disclosed. The control method includes the steps of acquiring a control...

Matches 1 - 50 out of 83 1 2 >