Patents in subclass Pumps/By Changing Electrical Characteristic Of Motor Or Motor Circuit
Parent class: Pumps
| Number | Patent title | Issue Date |
|---|---|---|
| 07402977 | 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 one cycle thereof; and a controller for... |
07/22/2008 |
| 07338260 | 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 and a non-volatile memory containing... |
03/04/2008 |
| 07321211 | 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 torque as a function of feedback velocity... |
01/22/2008 |
| 07281903 | 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 nozzle of predetermined cross-section, and... |
10/16/2007 |
| 07277289 | 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 resistor circuit board covered with... |
10/02/2007 |
| 07244106 | 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) positioned on the suction side of the fan and is... |
07/17/2007 |
| 07184254 | 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 plurality of transistors are electrically... |
02/27/2007 |
| 07096681 | 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 variable speed drive, wherein the screw... |
08/29/2006 |
| 07090469 | 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 output power such that the motor output power does not... |
08/15/2006 |
| 07086838 | 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 receive a driving signal causing the fuel pump... |
08/08/2006 |
| 07083392 | 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 surface angled with respect to a top... |
08/01/2006 |
| 07033141 | 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 excessive stroke from being generated when... |
04/25/2006 |
| 07029239 | 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. The control logic is configured to... |
04/18/2006 |
| 07023167 | Control arrangement for an induction motor compressor having at least three windings, a torque-augmentation circuit a starting capacitor and a resistive element Apparatus for driving a three-phase compressor assembly from a single-phase electrical power supply having first and second power lines, said three-phase compressor assembly comprising a compressor having a rotatable shaft, an electrical... |
04/04/2006 |
| 06979181 | 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 pump (10), determining at least one point of... |
12/27/2005 |
| 06939114 | 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 operatively interlocked with the output shaft of... |
09/06/2005 |
| 06933693 | 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 then generated from the voltage and current... |
08/23/2005 |
| 06930462 | Apparatus and method for controlling operation of compressor In an apparatus and a method for controlling operation of a compressor, by removing deviation generated by resistance and inductance and removing an error in a stroke estimation value of a compressor, operation of the compressor can be... |
08/16/2005 |
| 06857858 | 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 switched at the triac, integrating the... |
02/22/2005 |
| 06815922 | Apparatus and method for controlling operation of compressor An apparatus and a method are disclosed for controlling operation of a compressor capable of greatly decreasing a stroke estimation error of a compressor and controlling operation of the compressor accurately and precisely. The method... |
11/09/2004 |
| 06779981 | 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 and a rotation speed signal corresponding... |
08/24/2004 |
| 06779982 | 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 of a compressor used in a refrigerator... |
08/24/2004 |
| 06753665 | 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 includes an inverter controller for controlling... |
06/22/2004 |
| 06742992 | 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 of elongated cam followers connected to a... |
06/01/2004 |
| 06741056 | 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 characteristics of the pump are precalibrated to... |
05/25/2004 |
| 06725681 | 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 electric motor drives the compressor. A motor... |
04/27/2004 |
| 06709240 | 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 voltage and current data and spectrally... |
03/23/2004 |
| 06685438 | Apparatus and method for controlling operation of reciprocating compressor In an operation control apparatus of a compressor, a current, a voltage an d a TDC, etc. applied to a compressor are detected, a speed and a TDC are constantly controlled so as to place an operation point of the compressor within a high... |
02/03/2004 |
| 06682310 | Apparatus and method for controlling operation of reciprocating motor compressor An apparatus and method for operational control of a reciprocating motor compressor, includes performing an operation of the reciprocating motor compressor precisely and accurately. In addition, with the above apparatus and method, the... |
01/27/2004 |
| 06652239 | 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 hydraulically driven machine without the use... |
11/25/2003 |
| 06626644 | 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 an outer diameter thereof, opposite a... |
09/30/2003 |
| 06623246 | 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 to changes in a refrigerator and the... |
09/23/2003 |
| 06616416 | 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, the method includes, for example,... |
09/09/2003 |
| 06599095 | 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 jack is detected. An average value of... |
07/29/2003 |
| 06584997 | 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 of liquid and a liquid tank, the... |
07/01/2003 |
| 06554577 | 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 relation between a current and a... |
04/29/2003 |
| 06537034 | Apparatus and method for controlling operation of linear compressor An apparatus for controlling an operation of a linear compressor includes: a sensorless circuit unit for detecting a current and a voltage applied to a linear compressor and outputting a work operation value corresponding to them; a... |
03/25/2003 |
| 06531842 | 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 and inductors to provide a filter within... |
03/11/2003 |
| 06527519 | Apparatus and method for controlling the operation of a linear compressor using a suction/discharge pressure difference storing unit In an apparatus and a method for controlling a linear compressor, an apparatus for controlling a linear compressor includes a linear compressor adjusting a refrigerating capacity by a stroke voltage according to a stroke reference value,... |
03/04/2003 |
| 06524075 | 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 using a current and a displacement vector... |
02/25/2003 |
| 06520746 | Apparatus and method for controlling operation of reciprocating compressor In an apparatus and a method for controlling operation of a reciprocating compressor which is capable of operating a compressor stably by detecting a phase difference and using an inflection point of the phase difference, an apparatus and... |
02/18/2003 |
| 06514047 | 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 the rigid compression chamber when the... |
02/04/2003 |
| 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 variety of motor speeds, a graph of the... |
01/07/2003 |
| 06504338 | 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 variety of motor speeds, a graph of the... |
01/07/2003 |
| 06494685 | 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 displacement angle of the pump input shaft.... |
12/17/2002 |
| 06468041 | 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 created between a permanent magnet and a... |
10/22/2002 |
| 06457944 | 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 stroke frequency. The pump strokes are... |
10/01/2002 |
| 06393338 | 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 processor including associated electronic... |
05/21/2002 |
| 06341943 | 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 changeover valve for switching the compressed... |
01/29/2002 |
| 06325093 | 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 distributing reservoir, a first flow meter... |
12/04/2001 |