|
Match
|
Document |
Document Title |
|
|
7621721 |
Vacuum pumping device with electronic control of the motor
An oil mechanical vacuum pump, which is equipped with an electric motor comprises an electronic control device for supplying the electric motor with power. The electronic control device comprises a...
|
|
|
7547197 |
Driving controlling apparatus for linear compressor and method thereof
A driving controlling apparatus for a linear compressor, comprises a controlling unit for detecting a TDC by a phase difference inflection point between a stoke and a current with increasing the...
|
|
|
7534096 |
Method and system for improving pump efficiency and productivity under power disturbance conditions
A system for controlling operation of a progressing cavity pump to maintain the motor operating under power disturbance conditions. For a blackout condition, a backspin controller uses regenerative...
|
|
|
7489484 |
Protective device for a controlling system of a sewage pump
A protective device for a controlling system of a sewage pump has a protective circuit to protect a start capacitor and to avoid the start capacitor from burnout when an overload is occurred by...
|
|
|
7444824 |
Unitary control for air conditioner and/or heat pump
A unitary control for operating at least the fan and compressor of a climate control apparatus in response to signals received from a thermostat, the unitary air conditioning control includes a...
|
|
|
7402977 |
Apparatus and method for controlling operation of reciprocating motor compressor
An apparatus for controlling an operation of a reciprocating motor compressor includes a current integrator for integrating an alternating current applied to a motor of the compressor during each...
|
|
|
7338260 |
System and method for controlling current provided to a stepping motor
A system and method is disclosed for controlling the input electrical current to an infusion pump stepper motor based on predetermined torque requirements. The system can include a motor controller...
|
|
|
7321211 |
Power variation control system for cyclic loads
A method and apparatus for managing power demand of a motor in a cyclic load system having a rotational mass is provided. Flat power draw is achieved through continuous manipulation of the motor...
|
|
|
7281903 |
Device for varying the pressure of the fluid delivered by a jet washer
Device for varying the delivery pressure of a jet washer comprising a positive-displacement pump operated by a single-phase electric motor powered by alternating current and having a delivery...
|
|
|
7277289 |
Resistor for controlling a fan motor rotating speed for use in an air conditioner
Provided is a resistor for controlling a fan motor rotating speed for use in an air conditioner. The resistor comprises a base body, a radiator attached to a top portion of the base body, a printed...
|
|
|
7244106 |
Process and device for flow control of an electrical motor fan
A method and configuration from maintaining a constant of air to a protective helmet ( 4 ) from a fan ( 3 ) in a battery powered fresh air unit. The fan ( 3 ) is a radial fan with a filter ( 5 )...
|
|
|
7184254 |
Apparatus and method for controlling the maximum stroke for linear compressors
An apparatus and method for controlling the maximum stroke of a linear compressor is provided. The shorting of the normal supply voltage of a compressor to ground is used to detect overstroking. A...
|
|
|
7096681 |
System and method for variable speed operation of a screw compressor
A system and method are provided for variable speed operation of a screw compressor to obtain increased capacity and efficiency. The screw compressor is connected to an induction motor driven by a...
|
|
|
7090469 |
Turbomolecular pump
A turbomolecular pump ( 10 ) comprises a stator ( 12, 18 ), a pump rotor ( 20 ) a motor ( 28 ) for driving the pump rotor and a control device ( 42 ). The control device ( 42 ) controls the motor...
|
|
|
7086838 |
Fuel system with a field modification module for controlling fuel flow
The present invention provides a system for controlling speed of the fuel pump. The system includes a fuel pump, a controller, and a field modification module. The fuel pump is configured to...
|
|
|
7083392 |
Pump and pump control circuit apparatus and method
A method and apparatus for a pump and a pump control system. The apparatus includes pistons integrally formed in a diaphragm and coupled to the diaphragm by convolutes. The convolutes have a bottom...
|
|
|
7033141 |
Linear compressor and method for controlling the same
A linear compressor and a method for controlling the same. The linear compressor automatically short-circuits part of a coil having no power-supply voltage in order to substantially prevent an...
|
|
|
7029239 |
Piecewise linear control of the duty cycle of a pulse width modulated signal
A system may include a PWM generator and control logic. The PWM generator is configured to generate a PWM signal having a duty cycle dependent on a duty cycle value generated by the control logic....
|
|
|
6979181 |
Method for controlling the motor of a pump involving the determination and synchronization of the point of maximum torque with a table of values used to efficiently drive the motor
A method for controlling a motor ( 11 ) driving a pump ( 10 ) using a microcomputer ( 14 ) includes repeatedly sampling a parameter representative of motor torque over one cycle of operation of the...
|
|
|
6939114 |
Dynamotor driven compressor and method for controlling the same
A dynamotor capable of operating as either a motor or a generator is used with both the armature portion and the field portion thereof capable of being rotated. In the case where a pulley...
|
|
|
6933693 |
Method and apparatus of detecting disturbances in a centrifugal pump
The present invention is directed to a centrifugal pump wherein voltage and current data are detected from voltage and current sensors in the motor controller of a pump motor. A power signal is...
|
|
|
6857858 |
Device and method for controlling piston position in linear compressor
Device and method for controlling a piston position in a linear compressor, having a power source, a triac, and a motor, the device including a current phase detecting part for detecting a current...
|
|
|
6779982 |
Apparatus for controlling driving of reciprocating compressor and method thereof
Disclosed is an apparatus for controlling a driving of a reciprocating compressor and a method thereof, in which a cooling capacity is decreased without a re-expansion loss by controlling a driving...
|
|
|
6779981 |
Fan control system using a microcontroller
A fan control system. The fan motor is operated normally at not greater than a preset maximum rotation speed. The fan control system has a programmable microcontroller to receive an input voltage...
|
|
|
6753665 |
Linear compressor drive device
A linear compressor driving apparatus having an inverter which supplies a driving current of a predetermined frequency to a linear compressor. The linear compressor driving apparatus further...
|
|
|
6742992 |
Infusion device with disposable elements
An infusion device with a disposable administration set which is inexpensive to manufacture. In the preferred embodiment of the present invention the disposable administration set has a plurality...
|
|
|
6741056 |
Air sampler with compensating pump motor speed
A constant flow of air through a personal air sampler is provided regardless of changes in the air flow path, by altering the pump speed as a function of the power taken by the pump. The...
|
|
|
6725681 |
Air conditioner
An air conditioner for air conditioning the interior of a compartment includes a compressor and an electric motor. The compressor compresses refrigerant gas and changes the displacement. The...
|
|
|
6709240 |
Method and apparatus of detecting low flow/cavitation in a centrifugal pump
The present invention is directed to a centrifugal pump wherein voltage and current data are detected from voltage and current sensors in the pump motor. A power signal is then generated from the...
|
|
|
6652239 |
Motor controller for a hydraulic pump with electrical regeneration
Disclosure is made of a precision hydraulic energy delivery system that directly couples the pump to a primary mover (motor) and a related motor control. The system provides flow control of a...
|
|
|
6626644 |
Magnetically levitated pump and controlling circuit
An impeller has one surface with a soft magnetic member arranged closer to an inner diameter thereof, opposite an electromagnet, the impeller is provided with a permanent magnet arranged closer to...
|
|
|
6623246 |
Apparatus and method for controlling operation of linear motor compressor
An apparatus and a method for controlling operation of a linear motor compressor, by which a linear motor compressor can operate always in an optimum condition by coping with the load variation due...
|
|
|
6616416 |
Methods and system for motor optimization using capacitance and/or voltage adjustments
A system and method for controlling a variable capacity compressor driven by a motor. Preferably, said system and method are used with a reversible, two-stage compressor motor. In one embodiment,...
|
|
|
6599095 |
Pump-off control method of pump jack
A pump off control method comprises detecting the speed of the induction motor and an instantaneous value of secondary current of the induction motor. Down stroke time in every cycle of the pump...
|
|
|
6584997 |
Overflow prevention mechanism for liquid transfer systems
An overflow prevention mechanism for use in association with liquid transfer systems of the type including an electrically controllable flow control device such as a pump connected between a source...
|
|
|
6554577 |
Apparatus and method for controlling operation of linear compressor using pattern recognition
An apparatus and a method for controlling operation of a linear compressor uses a pattern recognition for operating a compressor at an optimum efficiency by recognizing a trace in a graph about...
|
|
|
6531842 |
Sine wave variable speed drive
The present technique utilizes already existing components within a variable speed drive to provide harmonic filtering characteristics. Particularly, the present technique integrates transformers...
|
|
|
6524075 |
Apparatus and method for controlling operation of compressor
In an apparatus and a method for controlling operation of a linear compressor, operation of a linear compressor is controlled by finding each inflection point as a TDC (top dead center) is 0 by...
|
|
|
6514047 |
Linear resonance pump and methods for compressing fluid
A pump and methods for compressing a fluid are provided that comprise a pump head comprising a flexible metal diaphragm attached to a rigid compression chamber. Fluid compression is provided within...
|
|
|
6504338 |
Constant CFM control algorithm for an air moving system utilizing a centrifugal blower driven by an induction motor
A method and apparatus for achieving constant air flow rate economically utilizes an induction blower motor with control settings determining the motor excitation voltage. A memory stores, for a...
|
|
|
6494685 |
Pump and motor assembly with constant pressure output
Disclosure is made of a method for electronic polar attenuation of torque profile for positive displacement pumps by a processor where the attenuated torque profile is compared with the shaft...
|
|
|
6468041 |
Magnetically levitated apparatus
There is provided a magnetically levitated apparatus wherein an impeller has one side supported by an electromagnet and the other side supported and magnetically levitated by an attractive force...
|
|
|
6457944 |
Regulation of the stroke frequency of a dosing pump
The invention relates to a method for operating a dosing pump, the pump being driven by an asynchronous motor, comprising a drive which converts the motor revolutions into pump strokes of a defined...
|
|
|
6393338 |
Apparatus and control method for accurate rotary peristaltic pump filling
A filling machine with a rotary peristaltic dispenser that compensates for the nonlinear flow rate characteristic of the dispenser to increase product fill accuracy is disclosed. A computer...
|
|
|
6341943 |
Blower
A blower supplies compressed air to a predetermined place. The blower is provided with a plurality of compressors, a common air tank for storing compressed air supplied from the compressors, a...
|
|
|
6325093 |
Water distributing installation controllers
A water distributing installation controller includes water pumps for supplying clear water from a filtration plant to a distributing reservoir, a level gauge for measuring the water level of the...
|
|
|
6315523 |
Electrically isolated pump-off controller
Electrical isolation method and assembly that protects a pump-off controller 31 as used for controlling the pumping of a subterranean well, from lightning and transient electrical power surges by...
|
|
|
6293255 |
Fuel injection system
The present invention is an injection system including an injection device. The injection device includes a pumping chamber and an electrically operated device associated with the pumping chamber...
|
|
|
6289680 |
Apparatus for controlling linear compressor and method thereof
An apparatus for controlling an operation of a linear compressor by which an instablel phenomenon caused due to a characteristics deviation of parts of a compressor is corrected to stabilize the...
|
|
|
6283717 |
Control circuit of a solenoid actuated pump to be powered by any variable voltage between 90 and 264 volts
A control circuit of a solenoid actuated pump includes an energizing means for energizing a solenoid of the solenoid actuated pump, a detecting means for detecting the electrical energy of a power...
|