Quotables
"The idea that cavalry will be replaced by these iron coaches is absurd. It is little short of treasonous."
Aide-de-camp to Field Marshal Haig ; At a tank demonstration, 1916
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7652440 | Switching system for controlling the starting of an electrical motor A low cost switching system for an electrical motor, which is speed sensitive, direction of rotation insensitive, load insensitive and voltage fluctuation insensitive. The switch contains a power supply, a control circuit, a zero cross detector circuit, a triggering... | 01/26/2010 |
| 7301301 | Electric car control apparatus In an electric car control apparatus for driving an induction motor, detection accuracy of a DC voltage is improved. A DC power supply device is provided which has a maximum potential terminal A, an intermediate potential terminal B, a minimum potential terminal C, ... | 11/27/2007 |
| 7299664 | Device for controlling motor in washing machine and method for controlling process of washing machine by using the same Device for controlling a motor in a washing machine and a method for controlling a process of a washing machine by using the same, the device including a motor, a power source part for supplying a voltage to the motor, a plurality of torque varying parts parallel to... | 11/27/2007 |
| 7271566 | Method and system for managing the voltage on the DC bus of a speed controller for an AC motor A method and system for managing the voltage of a DC bus of a speed controller for an AC electric motor linked to a current distribution network. The method includes comparing a value of the voltage measured on the DC bus with a determined limit value, when the valu... | 09/18/2007 |
| 7245105 | Single-phase induction motor and method for reducing noise in the same A single-phase induction motor and a method for reducing noise in the same, which can eliminate unbalance between magnetomotive forces of main and auxiliary windings in a stator of the motor, thereby implementing a low noise, low vibration motor, and can also achiev... | 07/17/2007 |
| 7233124 | Motor drive inverter control apparatus A motor drive inverter control apparatus includes a rectifier circuit for rectifying an AC power supply, an inverter circuit driven by an output from the rectifier circuit, a motor driven by an output from the inverter circuit, a first capacitor coupled in parallel ... | 06/19/2007 |
| 7170242 | Pulse-width-modulation motor drive circuit A PWM motor drive circuit includes a drive IC member, a Hall IC member, a PWM converter circuit and a capacitor. The drive IC member electrically connects with the Hall IC member, the drive IC member further includes a pin electrically connected with the PWM convert... | 01/30/2007 |
| 7034426 | Electric motor windings This invention relates to an alternating current electric motor, single phase or multiphase or synchronous generator, with primary windings (main windings) and de-saturation additional windings. Each additional winding is fed through one or more multiple capacitors ... | 04/25/2006 |
| 6952088 | PSC motor system for use in HVAC applications with improved start-up A motor control system for use in heating, ventilation and air conditioning applications including a blower and a motor coupled to drive the blower, an inverter coupled to provide energization to the motor, a relay capable of coupling the motor to the output of the ... | 10/04/2005 |
| 6924618 | Inverter controller for driving motor, and air conditioner An inverter controller for driving a motor includes a rectifier having a reactor, an inverter, a capacitor, a generator which generates a voltage command value for each phase of the motor, a detector which detects a DC voltage between the DC buses of the inverter, a... | 08/02/2005 |
| 6597144 | Method and apparatus for power loss detection and saving of operation settings in an appliance A method and apparatus for monitoring voltage input to an appliance, such as a dryer, sensing when power input to the appliance is lost. In addition, a controller in the appliance pulses relay coils controlling motors and/or heating devices within the app... | 07/22/2003 |
| 6175208 | High efficiency permanent split capacitor motor for driving a compressor A permanent split capacitor motor operable in a full mode and in a modulated mode for improving efficiency. The motor includes a stator and a rotor in rotational relationship with the stator. The motor also includes a single set of windings wound on the s... | 01/16/2001 |
| 5982122 | Capacitively powered motor and constant speed control therefor A capacitively powered motor having a power switching circuit adapted to be connected between a power source and its winding for selectively energizing the winding to generate a magnetic field which causes a rotating assembly to rotate. A position sensing... | 11/09/1999 |
| 5867005 | AC motor winding circuit A winding circuit for use with different input signals includes a first main winding, a second main winding, and an auxiliary branch having an auxiliary winding permanently and serially connected to a capacitor. The windings and auxiliary branch are alter... | 02/02/1999 |
| 5389861 | Machine tool power speed changer A retrofit power accessory for a turret mill provides a motor drive for changing machine tool speed, replacing a handwheel. A frame is attached to the mill by a pair of adjustable brackets which accommodate various models of mills. The frame carries a spi... | 02/14/1995 |
| 5300871 | Dual capacitor speed control apparatus and method for electric motor An induction motor speed control apparatus and method wherein various capacitors are switched in series with the auxiliary winding of an induction motor and, during such switching, the power source is disconnected from the main and auxiliary windings and ... | 04/05/1994 |
| 5280227 | Electronic control for an appliance An electronic control for a motor which eliminates the motor centrifugal switch and more particularly a control for a domestic refuse compactor which permits the user to control the approximate full trash bag weight and obtain more compaction from a split... | 01/18/1994 |
| 5276392 | Single phase AC motor speed control system A variable speed control system for a single phase AC induction motor wherein a controllable switch is in series with the main winding of the motor, while the auxiliary winding of the motor, which is in series with a capacitor, is continuously energized. ... | 01/04/1994 |
| 5270634 | Polyphase alternating current motor A polyphase alternating current motor has in addition to a main winding that can be connected to a voltage source, a auxiliary winding arranged in the stator, such that at least one condenser is connected to both windings per phase. A decrease in condense... | 12/14/1993 |
| 5237256 | Electronic control for an automatic washing machine with a reversing PSC motor A control for an automatic washing machine with a reversing permanent split capacitor (PSC) drive motor. Separate ferrite core sensors surround each of two PSC motor windings. A sense winding is threaded through both sensors. A brief output voltage is gen... | 08/17/1993 |
| 5146147 | AC motor drive system A motor drive system for driving a single-phase PSC motor, in which the two motor windings are conductively isolated from each other, from a two phase power source. In one embodiment, the PSC motor is supplied from a two phase inverter circuit. The PSC mo... | 09/08/1992 |
| 5130624 | Electronic control for an automatic washing machine with a reversing PSC motor A control for an automatic washing machine with a reversing permanent split capacitor (PSC) drive motor. Separate ferrite core sensors surround each of two PSC motor windings. A sense winding is threaded through both sensors. A brief output voltage is gen... | 07/14/1992 |
| 5086265 | Electrical circuit for a centrifuge To control the speed of an alternating-current drive capacitor motor of a centrifuge, the motor is connected to the bridge arm of a single-phase inverter. The bridge arm is connected at each of its ends to the midpoints of a series circuit of two capacito... | 02/04/1992 |
| 5051681 | Electronic circuit for a single phase induction motor starting An electronic circuit for starting a single phase induction motor operating from a source of alternating current, the motor having a cage type rotor, a coiled stator having at least a main winding and a starting winding, and a permanent capacitor connecte... | 09/24/1991 |
| 5038091 | Electronic control for an appliance An electronic control for a motor which eliminates the motor centrifugal switch and more particularly a control for a domestic refuse compactor which permits the user to control the approximate full trash bag weight and obtain more compaction from a split... | 08/06/1991 |
| 5017853 | Spikeless motor starting circuit A capacitor-start capacitor-run single phase AC induction motor control starting circuit is provided which minimizes first cycle current spiking magnitude, and also minimizes cycle to cycle current spiking magnitude, without a choke or inductor in the loo... | 05/21/1991 |
| 4972134 | Motor control circuit for automatic washer A motor control circuit for operating a permanent split capacitor motor from an ac source. The motor control circuit causes the motor to accelerate and decelerate according to a velocity profile. A driver circuit connects the motor to the ac source. The d... | 11/20/1990 |
| 4959573 | Electromagnetic induction machines having regulated polar magnetic symmetry In an induction motor rotor windings are connected together in a squirrel cage or a wound rotor Ɗ configuration and stator windings are connected in series across a source. A capacitor is connected in parallel with one of the stator windings and this com... | 09/25/1990 |
| 4937513 | Tapped auxiliary winding for multi-speed operation of electric motor and method therefor A capacitor motor and method is disclosed which utilizes one or more tap points within the auxiliary winding of the motor which can be selectively connectd to a source of AC power via a selector switch for multi-speed operation of the motor.... | 06/26/1990 |
| 4841188 | Speed changing device for electric fans A speed-changing device for electric ceiling fans includes a run coil for electrical connection to a motor of a ceiling fan, and a starting and speed changing coil, together with a starting capacitor, parallel-connected to the coil. The starting and speed... | 06/20/1989 |
| 4812728 | Electro magnetic braking circuit for small single phase induction motors A capacitive breaking circuit for a single phase induction motor using a double throw power switch which in the off position, connects a series string, consisting of a charging rectifier diode, a current limiting resistor, a centrifugal switch and a braki... | 03/14/1989 |
| 4808868 | Single and polyphase electromagnetic induction machines having regulated polar magnetic symmetry An induction motor includes a stator having at least one pair of stator windings and a rotor with rotor windings which are magnetically coupled to the stator windings via a circumferential air gap. The rotor windings are connected together in a squirrel c... | 02/28/1989 |
| 4772814 | Parallel resonant single phase motor An improved electric motor is operated from a single phase alternating current power source and employs a start winding and a run winding connected in series. A capacitor is connected in parallel with the start winding; and the inductance of the start win... | 09/20/1988 |
| 4761602 | Compound short-circuit induction machine and method of its control An induction machine having a stator carrying phase coils divided into at least two independently fed sets of coils, with a rotor or armature carrying one or more loop members, each of which is a short-circuited, continuous isolated loop conductor member ... | 08/02/1988 |
| 4751451 | Fan motor control system This invention relates to motor speed control circuits employing capacitors. Two windings of a motor are connected in parallel to a neutral phase of an alternating current source. Each coil of the motor may be connected to the live phase of the source whe... | 06/14/1988 |
| 4745348 | Apparatus for starting and running a plurality of three-phase motors from a single-phase power source An apparatus for starting and running a plurality of three-phase motors from a single-phase power source is described. Two of the main coils of a three-phase motor are used to run the motor as a single-phase induction motor. The third coil of a three-phas... | 05/17/1988 |
| 4737701 | Tapped auxiliary winding for multi-speed operation of electric motor and method therefor A capacitor motor and method is disclosed which utilizes one or more tap points within the auxiliary winding of the motor which can be selectively connected to a source of AC power via a selector switch for multi-speed operation of the motor.... | 04/12/1988 |
| 4719399 | Quick discharge motor starting circuit A motor starting control circuit is provided with an auxiliary switch (100), including a triac (102) and series resistor (114), connected across the start capacitor (5) for quickly discharging the start capacitor (5) upon disconnection of the start capaci... | 01/12/1988 |
| 4678978 | Quieting circuits for permanent magnet synchronous motors Quieting circuits for synchronous electric motors bypass their phase shifting coils with a minor percentage of the total motor watts input.... | 07/07/1987 |
| 4672284 | Permanent split-phase capacitor induction motor A permanent split-phase capacitor induction motor having a capacitor (7) connected in series with an auxiliary winding (5) via an electronic switch (9) which is operated by a control circuit (11, 13) so as to obtain a higher starting torque than if the sw... | 06/09/1987 |
