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8182245 Inverter driven compressor operation method and compressor drive device  
A boot capacitor that functions as an operating power supply for a high-arm-side transistor provided in an inverter has to be charged prior to normal operation of a motor. This operation of...
8133033 High voltage bus capacitor pre-charger circuit  
A precharge circuit (20, 20′, 20″) charges at least one capacitor (22, 22′, 22″) associated with an electrical device with high capacitance, such as a motor (14) which drives a compressor (16) of...
8043070 Speed control  
A pumping system for moving water of a swimming pool includes a water pump, an infinitely variable speed motor, and an arrangement for operating the motor. In one example, the pumping system...
8028409 Method of fabricating planar spring clearance seal compressors  
In accordance with the method, a gas bearing is energized to center the piston in the cylinder prior to rigidly attaching the planar spring or springs between the piston and the compressor frame....
7995340 Ventilation device ventilating an electronic module  
An electronic module comprises a ventilation device used for the efficient cooling of the components of this module while at the same time minimizing the accumulation of solid particles. To this...
7967573 Method for driving a bidirectional motor to rotate a fluid circulation pump  
A method for starting a motor (14) with a bidirectional rotation direction, to rotate a fluid circulation centrifugal pump (10) having a predetermined optimum hydraulic efficiency depending on the...
7878766 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...
7880418 Electromechanical drive system, in particular for progressive cavity pumps for oil wells  
The following invention is an electromechanical system (1) that is to be connected to an electricity supply (7), comprising: an electric machine (2) that can operate as an independent generator...
7859801 Control apparatus for linear compressor  
The present invention discloses a control apparatus for a linear compressor which can vary a cooling force and prevent an inrush current. The control apparatus for the linear compressor includes a...
7854597 Pumping system with two way communication  
A pumping system for moving water of a swimming pool includes a water pump, a variable speed motor, and an arrangement for controlling the variable speed motor. The pumping system further includes...
7796386 Electronic device with airflow reversal prevention assembly  
An electronic device includes a housing, an active fan installed in the housing, and an airflow reversal prevention assembly. The assembly includes a fixed rack secured to the housing opposite to...
7758315 Pump controller for controlling pumps connected in tandem  
A system for automatically controlling a pumping unit used in fire suppression comprises a pumping unit, a water flow sensor and a pump controller. The pumping unit has a pump with a suction inlet...
7704052 Air compressor and method for controlling the same  
An air compressor includes: a tank portion for reserving compressed air used in a pneumatic tool; a compressed air generation portion for generating compressed air and supplying the compressed air...
7704051 Pump controller system and method  
A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed...
7686589 Pumping system with power optimization  
The present invention provides a pumping system for moving water of a swimming pool, including a water pump and a variable speed motor. In one example, a target volume amount of water and an...
7665972 Apparatus and method for controlling operation of reciprocating compressor  
An apparatus and a method for controlling an operation of a reciprocating compressor which can improve operational efficiency of the reciprocating compressor are provided. The apparatus for...
7630201 Heat radiating apparatus and electronic apparatus  
While one of ventilation fans operates, the other ventilation fan is at rest. Air flows from the operating ventilation fan to the ventilation fan at rest. The airflow passes through an air passage...
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...
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) positioned...
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...
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 output power...
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 pump...
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...
Matches 1 - 50 out of 293 1 2 3 4 5 6 >