Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 8188697 | Apparatus and method for driving a motor A sampling circuit samples, while running a motor at a predetermined rotational speed, over a predetermined period a back electro-motive force induced at one end of at least one phase coil, with one end of each phase coil of the motor being brought to a high impedan... | 05/29/2012 |
| 8179073 | Robotic devices with agent delivery components and related methods Various robotic devices and related medical procedures are disclosed herein. Each of the various robotic devices have an agent delivery component. The devices include mobile robotic devices and fixed base robotic devices as disclosed herein. The agent delivery compo... | 05/15/2012 |
| 8174224 | Torque production in an electric motor in response to current sensor error Methods and systems are provided for producing a commanded torque in an electric motor in a vehicle. A method comprises obtaining a torque command, obtaining a speed of the electric motor, and operating the inverter based at least in part on a voltage command that c... | 05/08/2012 |
| 8169176 | Controlling method for driving a drawer of a refrigerator A movement structure for a drawer of a refrigerator is provided. The movement structure may a storage box to be automatically withdrawn from or inserted into a storage compartment of the refrigerator by pressing a button. This automatic movement of the storage box m... | 05/01/2012 |
| 8169175 | System and method for driving a drawer in a refrigerator A system and method for driving a drawer of a refrigerator and a refrigerator employing this system is provided. This system and method allows for the automatic opening and closing of multiple drawers of a refrigerator either sequentially or simultaneously. The syst... | 05/01/2012 |
| 8164289 | Brushless motor and control method of brushless motor In a brushless motor having a stator including armature windings for a plurality of phases, and a rotor including a permanent magnet and being rotatably disposed inside or outside of the stator, an inter-phase induced voltage waveform between two different phases in... | 04/24/2012 |
| 8164298 | System and method for detecting loss of isolation while an AC motor is operating Methods and systems are provided for detecting loss of isolation of a motor, connections, or phase cables while an AC motor is operating. The system includes a power supply that is substantially isolated from the ground or chassis having a power supply voltage, and ... | 04/24/2012 |
| 8159159 | Controlling tension in roll-based print media An apparatus, method and computer program for controlling the tension in roll-based print media. The apparatus comprises: a motor arranged to apply torque to the roll of print media to create tension in the print media; and processing means arranged to detect first ... | 04/17/2012 |
| 8159163 | Phase current estimation device of motor and magnetic pole position estimation device of motor A phase current estimation device of a motor includes: an inverter which uses a pulse width modulation signal to sequentially commutate an electric flow to a motor of a three-phase alternating current; a pulse width modulation signal generation unit generating the p... | 04/17/2012 |
| 8159164 | Variable-delay-time control system for a motor A variable-delay-time control system for a motor is provided. The system includes a control unit, a driving unit, and a motor. The control unit is used to output at least one control signal according to at least one predetermined signal, and the control signal has a... | 04/17/2012 |
| 8154235 | Electric drive An electric drive has at least one electric motor and a power converter feeding electrical motor current thereto. A current desired-value emitter generates a reference signal. An additional circuit is coupled to the current desired-value emitter so as to receive the... | 04/10/2012 |
| 8148932 | System and method for driving a drawer in a refrigerator A system and method for driving a drawer of a refrigerator are provided. This system allows a drawer to be automatically withdrawn from and/or inserted into a main body of the refrigerator. This system also allows a drawer which has been stopped during the withdrawa... | 04/03/2012 |
| 8148924 | Electrical motor load controller and control methods therefor An electrical load controller that controls the starting sequence for a plurality of electrical loads includes a start demanding unit that generates a demand to start at least one of the plurality of electrical loads. A first electrical load is started immediately i... | 04/03/2012 |
| 8143821 | Bidirectional unequal speed electric motor driven constant directional output system The present invention discloses that the output end of the bidirectional unequal speed electric motor being particularly used to provide bidirectional rotating input is transmitted to the input end of bidirectional same or different speed change ratio constant direc... | 03/27/2012 |
| 8143833 | Processing unit The invention relates to a processing unit of a measuring signal related to conditions of an object controlled by power electronics. The processing unit comprises an interface with digital terminals, wherein the interface is provided with at least one terminal for a... | 03/27/2012 |
| 8143817 | Electromagnetic actuator driving method An electromagnetic actuator includes a stator and a movable body. The stator includes a core provided with magnetic poles and a coil wound on at least one of the magnetic poles. The movable body includes a permanent magnet and supported in such a manner as to make r... | 03/27/2012 |
| 8143832 | Method and unit for operating an electromechanical adjusting device In a method for operating an electromechanical adjusting device, having an actuating part driven by a controller controlled motor, and which can be adjusted according to a manual specification for a controller operating element between a first and a second end posit... | 03/27/2012 |
| 8143822 | Bidirectional unequal speed electric motor driven bidirectional output system The present invention discloses that the output end of the bidirectional unequal speed electric motor being particularly used to provide bidirectional rotating input is transmitted to the input end of bidirectional same or different speed change ratio output transmi... | 03/27/2012 |
| 8143823 | Bidirectional different speed ratio electric motor driving device with bidirectional input The present invention discloses that the output end of the electric motor capable of being operated in bidirectional rotation is transmitted to the input end of different rotating speed ratio and direction output transmission device, and it is through the output end... | 03/27/2012 |
| 8143830 | Brushless motor apparatus A blushless direct current (BLDG) motor apparatus includes: a stator which is provided with a plurality of windings corresponding to N phases and wound in parallel independently of each other; a rotor which has a plurality of poles corresponding to the plurality of ... | 03/27/2012 |
| 8134323 | Bypass and synchronous transfer arrangement for a medium voltage drive control system A medium voltage variable frequency drive having a 2-high controller configuration with a dual bus system is described. The drive control system includes at least one motor control cabinet housing a fused medium voltage bypass controller, a non-fused transfer contro... | 03/13/2012 |
| 8129932 | Driving apparatus for three-phase AC synchronous motor In a driving apparatus for a three-phase synchronous motor, in which a battery is connected between a neutral point of a stator coil and a negative-pole bus, a control circuit acquires three-phase AC currents. The control circuit checks whether a neutral-point elect... | 03/06/2012 |
| 8125169 | Rotating electrical machine control system and vehicle drive system A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for supplying electric power to the rotating electrical machine, and that conver... | 02/28/2012 |
| 8125171 | Process for driving an electric machine and driver system therefor A method for operating an electric machine with a driver system is provided, in which an operating variable of the electric machine and/or of the driver system is monitored. The validity of the input variables is checked with regard to their checksum and whether the... | 02/28/2012 |
| 8120290 | Energy management system to improve efficiency of electric and hybrid drive trains A propulsion system is provided that includes an electric drive, a first energy storage system electrically coupled to the electric drive through a direct current (DC) link, and a second energy storage system electrically coupled to the electric drive. The propulsio... | 02/21/2012 |
| 8120304 | Method for improving motion times of a stage Methods and systems for, in one embodiment, accelerating a stage through a clearance height in a first direction and decelerating the stage in the first direction while accelerating in a second direction are shown. The stage is moved in a third direction and a deter... | 02/21/2012 |
| 8115435 | Device for controlling a polyphase synchronous rotary electrical machine and polyphase synchronous rotary electrical machine containing such a device A control device (2′″) for an AC-DC current converter associated with a polyphase synchronous rotary electrical machine. The AC-DC current converter contains, for each phase, a branch of two power switches in series, known as high and low (25). The... | 02/14/2012 |
| 8115430 | Methods, systems and apparatus for controlling operation of two alternating current (AC) machines A system is provided for controlling two AC machines. The system comprises a DC input voltage source that provides a DC input voltage, a voltage boost command control module (VBCCM), a five-phase PWM inverter module coupled to the two AC machines, and a boost conver... | 02/14/2012 |
| 8115436 | Motor control apparatus and motor system In a motor control apparatus, apparatus all switching devices of all phases of an inverter are kept fixed at OFF in accordance with a value of an all-OFF control pulse signal Poff outputted by a pulse generator. The pulse generator generates at least twice a pulse c... | 02/14/2012 |
| 8115445 | Operation control method and operation control apparatus for variable speed generator-motor An excitation device supplies a three-phase AC excitation current to a variable speed generator-motor, and controls the variable speed generator-motor based on a three-phase AC excitation current command value obtained by vector-synthesizing, based on a slip phase f... | 02/14/2012 |
| 8111033 | Stepping motor control circuit and analog electronic timepiece The present invention aims to prevent a nonrotation state from being brought about even when a drive allowance is changed by variations in a stepping motor or the like. A pulse down counter circuit outputs pulse down control signal for subjecting main drive pulse to... | 02/07/2012 |
| 8102132 | Starting apparatus for at least two synchronous machines A starting apparatus is disclosed for at least two synchronous machines, which starting apparatus includes an exciter unit which is provided for each synchronous machine and is associated with the respective synchronous machine. Each exciter unit can be connected to... | 01/24/2012 |
| 8098036 | Electric power tool An electric power tool is provided that includes a motor as a driving source, a first operation switch, a first semiconductor switch, and a second semiconductor switch. The first operation switch is operated by a user to be turned ON/OFF. The first semiconductor swi... | 01/17/2012 |
| 8098033 | Motor drive circuit A motor drive circuit comprising: a triangle wave generation circuit configured to charge/discharge a capacitor with a charging/discharging current having a current amount corresponding to an amplitude control voltage for controlling an amplitude of an oscillation v... | 01/17/2012 |
| 8093853 | Device-positioning pedestal and handler having the device-positioning pedestal A device-positioning pedestal capable of positioning devices of different sizes. The device-positioning pedestal comprises a plurality of guide members corresponding to the sides of the device and coming in contact with the sides of the device to position the device... | 01/10/2012 |
| 8093850 | Fan control system A fan control system includes a linear adjustor, an input/output controller, and a temperature sensor. A first terminal of the linear adjustor is connected to a first power supply. A second terminal of the linear adjustor is connected to a fan and grounded via a fir... | 01/10/2012 |
| 8093856 | Position control apparatus for numerically controlled machine In a position control apparatus that drives a feed-axis with a servomotor of a machine tool, the machine tool may be quickly accelerated or decelerated in a state where a machine structural member that supports and fixes a structural member including a driving syste... | 01/10/2012 |
| 8089228 | Computer activated gas cap An automated gas cap mechanism for opening and closing the fuel tank of a vehicle includes a housing with a filler compartment door mounted on a door support link that is coupled to an axle having first and second ends mounted in slots formed in the housing and conf... | 01/03/2012 |
| 8089225 | Systems and methods for inertially controlling a hovering unmanned aerial vehicles Systems and methods for inertially controlling a hovering unmanned aerial vehicle (HUAV) are provided. One inertial controller includes a frame and a sensor for detecting a change in an orientation and/or motion of the frame with respect to a predetermined neutral p... | 01/03/2012 |
| 8089241 | Motor drive control apparatus, vehicle equipped with motor drive control apparatus, and motor drive control method When a target operation point of either a motor MG1 or a motor MG2 is included in a resonance range specified by operation points of the motor MG1 or the motor MG2 in the occurrence of resonance in a booster converter, a hybrid vehicle co... | 01/03/2012 |
