Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 8049459 | Blower motor for HVAC systems A blower motor assembly having a variable speed motor that is suitable for direct, drop-in replacement in a residential HVAC (heating, ventilation, and air conditioning) system that employs a PSC motor. The blower motor assembly includes at least a neutral input and... | 11/01/2011 |
| 7872440 | Controller of electric motor A controller of an electric motor for improving operation efficiency in performing electric conducting control of the electric motor of an axial air-gap type is provided. Therefore, the controller of the electric motor (3) of the axial air-gap type including ... | 01/18/2011 |
| 7746025 | Variable speed motor A variable speed motor includes a main winding including first and second main windings, and an auxiliary winding including first and second auxiliary windings, wherein the main winding and the auxiliary winding are wound on a stator to form a plurality of poles, an... | 06/29/2010 |
| 7683561 | Device for the incremental control of a direct-current motor for the cooling fan of a motor vehicle The invention relates to a device (10) for the incremental control of at least one first direct-current motor (12) for the cooling fan of a motor vehicle. Said device comprises a first (14) and a second current-limiting component (16), an... | 03/23/2010 |
| 7579804 | Method to measure the angular speed of an induction motor The invention relates to a method for determining the electric angular speed of a rotor of an induction motor, wherein electric power supplied to phases of a stator of the induction motor affects the rotor, comprising the steps of: switching off the electric power s... | 08/25/2009 |
| 7474074 | Variable speed induction motor with wye-delta switching with reduced drive volt-amp requirement A washing machine comprising a laundry receptacle, a variable speed induction motor driving the laundry receptacle at a wash speed and as spin speed, a drive for powering the motor, and a wye-delta switch for connecting the drive and the motor in a wye configuration... | 01/06/2009 |
| 7446500 | Method for operating a programmable washing machine In an anti-crease operation incorporated after the program sections wash and spin to loosen laundry in the drum, the user should be offered the possibility of being able to actively influence this operation. For selecting the adjustable parameters for the duration a... | 11/04/2008 |
| 7420351 | Power-factor correction device for variable speed drive A variable speed drive for a three-phase electric motor, including a rectifier module supplying a rectified voltage from a single-phase alternating current network, a voltage step-up module supplying a regulated bus voltage, and an inverter module supplying a contro... | 09/02/2008 |
| 7408320 | Apparatus for power control by phase gating and a method for harmonic reduction The invention relates to an apparatus for power control by phase gating of an AC voltage, which supplies an electrical load (14), and for reduction of harmonics which are created by the phase gating, in particular up to a region of 4 kHz, preferably in the re... | 08/05/2008 |
| 7382103 | Magnetic gearing of permanent magnet brushless motors A permanent magnet brushless 3-phase motor comprises windings R, Y, B, each divided into a plurality of sections 1-5 and switch means S1-S12 for selectively connecting the section of the respective winding e.g. R in series and/or parallel... | 06/03/2008 |
| 7352557 | Vertical capacitor apparatus, systems, and methods An apparatus and system, as well as fabrication methods therefor, may include a plurality of vertically-oriented plates separated by dielectric layers, wherein the vertically-oriented plates include a plurality of terminals coupled to a bottom side of the plates. | 04/01/2008 |
| 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 |
| 7279864 | Control unit for driving a regulating transistor of a fan arrangement A control unit for driving a regulating transistor (2) of a fan arrangement, in which the regulating transistor (2) is connected in series with an electronically commutated fan (1), having control means (5, 6, R1, R2) for th... | 10/09/2007 |
| 7279857 | System, method, and computer-readable medium for reduction of commutation-related acoustic noise in a fan system A method for reducing commutation-related acoustic noise in a fan system is provided. A constant frequency periodic signal is generated and a fan commutation event is synchronized with a zero level value of the constant frequency periodic signal. A system for contro... | 10/09/2007 |
| 7271565 | Apparatus for controlling speed of fan motor of air-conditioner An apparatus for controlling a speed of a fan motor (HIM (Hybrid Induction Motor)) of an air-conditioner extends a speed control range of a fan motor of an air-conditioner by controlling revolutions per minute (RPM) of the fan motor. In order to extend the speed con... | 09/18/2007 |
| 7272302 | PSC motor system for use in HVAC applications with field adjustment and fail-safe capabilities A field-adjustable motor control system includes a motor, an inverter coupled to provide energization to the motor, a controller coupled to the inverter, and a field adjustment circuit that provides field adjustment signals to the controller. The controller provides... | 09/18/2007 |
| 7268505 | Electric machine and method of operating the electric machine A method of and apparatus for controlling an electric machine. The method can include using a controller to detect whether power is present at a first node of the controller, detect whether power is present at a second node of the controller, generate at least one s... | 09/11/2007 |
| 7249931 | High efficiency air conditioner condenser fan with performance enhancements Twisted blades for outdoor air conditioner condensers and heat pumps that improve airflow efficiency to minimize operating power requirements. The blades can run at approximately 850 rpm to produce approximately 1930 cfm of air flow using approximately 110 Watts of ... | 07/31/2007 |
| 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 |
| 7239109 | Single-phase induction motor A single-phase induction motor includes a main winding, an auxiliary winding, a run capacitor, and a subsidiary start device. The auxiliary winding is configured such that the number of turns of the auxiliary winding, through which a current flows, varies according ... | 07/03/2007 |
| 7208897 | Motion control system for barrier drive A system for operating a barrier system such as a garage door, gate or fence. A DC motor is connected to and operates a barrier drive. A power amplifier is configured to receive power signals from a power supply and to output modulated DC signals to the DC motor. A ... | 04/24/2007 |
| 7202627 | Load and speed sensitive motor starting circuit and method A circuit and method measures main motor winding voltage and detects points in the electromagnetic wave cycle where this voltage “crosses” zero. It also measures auxiliary motor winding voltage. Phase shifts measured in the auxiliary winding are compared as a me... | 04/10/2007 |
| 7196490 | Variable speed motor A variable speed motor includes first and second main windings wound on a stator, and a relay for performing a switching operation between serial/parallel connections of the first and second main windings to control motor speed. The variable speed motor further incl... | 03/27/2007 |
| 7190086 | Wind energy plant with an asynchronous machine for determining the azimuth position An asynchronous machine has a first rotor/stator arrangement in which the rotor is connected to a shaft, and a method of controlling such an asynchronous machine is provided. A drive is provided which permits nullification of the play of the mechanical components in... | 03/13/2007 |
| 7190137 | Method to control an electronically commutated motor and motor controller The invention relates to a method to control an electronically commutated motor in which the motor current is influenced as a function of an operating parameter of the motor. According to the invention, the motor current is adaptively switched as a function of the o... | 03/13/2007 |
| 7166974 | Method for controlling the firing angle of an electric motor Disclosed is a method for controlling the firing angle of a signle-phase AC powered electric motor which is triggered by means of at least one locking electronic switch, especially a triac (T1 and T4) located between the distribution voltage (UV | 01/23/2007 |
| 7138772 | Electrically movable vehicle and control program for driving electrically movable vehicle The invention provides an electrically movable vehicle drivable by a simplified mode of control and a control program for driving the vehicle. A normalized value Y′ representing translation motion and a normalized value X′ representing turning motion are fed fro... | 11/21/2006 |
| 7126304 | Motor controller and electric power steering apparatus A microcomputer includes a rotation angular velocity computation section, a feedback gain determination section, and a dead time compensation amount determination section. The rotation angular velocity determination section computes the rotation angular velocity of ... | 10/24/2006 |
| 7102324 | Fixed speed drive A controller for an electric machine. The controller includes a first voltage input that directly provides a first voltage to the electric machine, a second voltage input configured to receive a second voltage, and an inverter coupled to the second voltage input. Th... | 09/05/2006 |
| 7095209 | Method and apparatus to regulate torque provided to loads A method and apparatus for use with a controller for controlling a machine wherein a torque reference value is provided, the method for identifying an error representative of the difference between the torque reference value and the torque applied to the machine and... | 08/22/2006 |
| 7091691 | Variable speed motor An outer-rotor variable-speed motor, to which single-phase AC power is applied and on which a rotor is provided outside a stator, comprises first and second main windings provided on a stator of the motor to form a plurality of poles, a frequency detector for detect... | 08/15/2006 |
| 7075255 | Variable speed controller for a family of multi-tap motors A system for variable speed motor control provides continuous variable speed motor controller for each motor or motor application within a family of multi-tap motors while using a single controller. The single controller utilizes a wave chop technique providing vari... | 07/11/2006 |
| 7071650 | Synchronous induction motor and electric hermetic compressor using the same A synchronous induction motor has a stator having a main winding and an auxiliary winding; a rotor having a yoke, a permanent magnet embedded in the yoke and a secondary conductor provided in the vicinity of periphery of the yoke; and a starter. The starter has a st... | 07/04/2006 |
| 7045979 | Multiple-speed electric machine and method of operating the same An electric machine assembly having an electric machine. The electric machine can include a first speed circuit and a second speed circuit. In some constructions, both speed circuits can be of a permanent split capacitor design. At least one of the speed circuits ca... | 05/16/2006 |
| 7042192 | Switch assembly, electric machine having the switch assembly, and method of controlling the same A compressor having a winding circuit and a driven member being driven in part by a winding of the winding circuit. The compressor further includes an auxiliary circuit connected in a parallel relationship with the winding circuit. The auxiliary circuit has an auxil... | 05/09/2006 |
| 7034500 | Electric drive assembly An electric drive includes a rotatable shaft, a first drive member, and a second drive member, and is supplied with power from a controller. The controller is operable to supply a first power from a power electronics converter, and a second power that is line power.... | 04/25/2006 |
| 7030773 | System and method for communicating with an appliance through a light emitting diode An apparatus includes a controller for controlling operation of an appliance, an indicator light coupled to the controller to provide a visible indication of an operator selection in response to the controller energizing the indicator light, and a driver coupled to ... | 04/18/2006 |
| 7023166 | Method for torque control of an induction motor using a voltage controller A method of controlling the torque of a multiphase induction motor includes the step of energizing the stator windings of the motor from a power converter using thyristors, inserted between a multiphase main supply and the windings producing a stator current set poi... | 04/04/2006 |
| 7014423 | High efficiency air conditioner condenser fan Novel twisted blades with an air foil for use with air conditioner condensers and heat pumps that provide improved airflow efficiency to minimize operating power requirements having an overall diameter across the blades being approximately 19 inches, and approximate... | 03/21/2006 |
| 7012387 | Circuit that eliminates the sneak path for dual-speed DC motors A system for controlling a dual-speed motor includes a direct current (DC) power supply, a dual-speed DC motor, a first solid-state switch electrically coupled to the DC power supply and a low-speed input of the dual-speed DC motor, a second solid-state switch elect... | 03/14/2006 |
