Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7348749 | Control device for synchronous motor A control device is provided for a synchronous motor, which drives the synchronous motor through a voltage operated PWM inverter and controls a torque and a speed of the motor, including a unit for causing a PWM carrier signal to have an arbitrary phase difference b... | 03/25/2008 |
| 7312595 | Motor control apparatus Presence/absence of a failure in a feedback control system of a motor is monitored. When a failure is detected in the feedback control system, the motor is driven by switching to an open-loop control. During the open-loop control, the motor is rotated by sequentiall... | 12/25/2007 |
| 7305297 | Controller for controlling a plant The present invention provides a controller for controlling a modeled plant robustly against disturbance. The controller comprises an estimator and a control unit. The estimator estimates disturbance applied to the plant. The control unit determines an input to the ... | 12/04/2007 |
| 7279862 | Fault handling of inverter driven PM motor drives An apparatus includes a multi-phase inverter, a fault detector to indicate a detection of a fault, a sensor to provide a speed signal indicative of whether a speed of a PM motor is greater than a transition speed, and a controller. The controller is operable to appl... | 10/09/2007 |
| 7276874 | Storage apparatus, seek control method and program A movement controlling unit performs movement control of a head toward a target track on a magnetic disk medium driving a head actuator, and a position controlling unit performs position control of the head actuator in accordance with proportional integral calculati... | 10/02/2007 |
| 7234556 | One-touch cruise control system A vehicle cruise control system comprises a plurality of pre-set cruise control speed buttons and cruise control logic circuitry coupled to the pre-set cruise control speed buttons. Each one of the pre-set cruise control speed buttons corresponds to a respective pre... | 06/26/2007 |
| 7229046 | Servo mounting system for direct drive of an aircraft control surface This invention is a servo mounting system, which allows a servo with a rotating output shaft to directly power an aircraft control surface. A specially designed servo mount securely positions the servo with the central axis of its rotational output shaft on, and axi... | 06/12/2007 |
| 7200484 | Controller for controlling a plant The present invention provides a controller for controlling a modeled plant robustly against disturbance. The controller comprises an estimator and a control unit. The estimator estimates disturbance applied to the plant. The control unit determines an input to the ... | 04/03/2007 |
| 7194339 | Method of controlling motor, motor control device, and printing method A motor-controlling method includes the steps of: preparing a motor control device provided with a motor for moving an object to be moved and causing the motor to move the object to a target position by first accelerating the object and then moving the object at a c... | 03/20/2007 |
| 7157889 | Sample and hold system for controlling a plurality of pulse-width-modulated switching power converters A system is disclosed for controlling a plurality of pulse-width-modulated switching power converters. The system includes a sample and hold circuit which is configured to receive information at time-separated intervals. The information the sample and hold circuit r... | 01/02/2007 |
| 7147299 | Control unit and method for controlling motor for use in printer, and storage medium storing control program There is provided a control unit capable of rapid and precise stoppage of an object to be driven by a motor for use in a printer. The control unit has a speed control part to control the object by acceleration control, constant speed control, deceleration control, a... | 12/12/2006 |
| 7148648 | Controller for controlling actuator device installed on vehicle so as to maintain silence and comfort in vehicle A controller for controlling an actuator device which is installed on a vehicle and operated by a motor. The controller includes: a motor control portion operable to control the motor on the basis of a target value; and a target-value determining portion operable to... | 12/12/2006 |
| 7142930 | Disturbance estimated type control system, gas compressor control system and method of designing a disturbance estimated type control system A disturbance estimated-type control system has a control object based on a mathematical model having of one of a state equation and a transfer function and prepared by system identification technology. A disturbance estimating device is based on an expansion system... | 11/28/2006 |
| 7137595 | Flight lock actuator with dual energy sources A flight lock actuator that can be powered by two sources of stored energy when aircraft power has been switched off. A mechanical energy storage means and an electrical energy storage means provide a fully redundant energy storage system that stores sufficient ener... | 11/21/2006 |
| 7132067 | Mold-clamping control method for injection molding machine A mold-clamping control method for an injection molding machine includes the steps of detecting a value of a monitor item in a monitor region predetermined in relation to a mold closing operation in a mold clamping step; performing emergency processing when the dete... | 11/07/2006 |
| 7128855 | Mold-clamping control method for injection molding machine A mold-clamping control method for an injection molding machine includes the steps of detecting a value of a monitor item in a monitor region predetermined in relation to a mold closing operation during the course of a mold clamping step; differentiating the detecte... | 10/31/2006 |
| 7113850 | Method and apparatus for active acoustic damping motor control Active acoustic damping is provided with a motor or similar propulsive element such as a multi-phase brushless direct current (DC) motor. To produce the appropriate canceling effect with the motor, the relationship between the operating mode of the motor and the noi... | 09/26/2006 |
| 7106020 | Method of operating a brushless DC motor Methods and devices for brushless DC motor operation. An example method may include using previously sensed Hall effect sensor transitions to predict a future Hall effect transition, and dividing a time between a most recent Hall effect sensor transition and the pre... | 09/12/2006 |
| 7084597 | Motor control apparatus In an automatic transmission position control by a motor, it is determined whether the present instant belongs to a starting period, that is, the present instant is immediately after resetting of a control unit or application of power to it. If it is the starting pe... | 08/01/2006 |
| 7084601 | Phase current detector A first condenser is connected between output terminals of a rectifier circuit which receives an AC power as an input, and a three phase inverter is connected in parallel with respect to the first condenser, and output of the three phase inverter is supplied to a mo... | 08/01/2006 |
| 7081729 | Variable-structure diagnostics approach achieving optimized low-frequency data sampling for EMA motoring subsystem The present invention provides a diagnostics methodology and embedded electronic system that allows optimized low-frequency data sampling for EMA motoring subsystems in an operating vehicle. Each of the EMA motoring subsystems includes: an EMA; at least one motor fo... | 07/25/2006 |
| 7081730 | Motor controller system for large dynamic range of motor operation A motor controller system uses a rotary sensor with a plurality of signal conditioning units, coupled to the rotary sensor. Each of these units, which is associated with a particular range of motor output shaft rotation rates, generate a feedback signal indicative o... | 07/25/2006 |
| 7078872 | System and method for conditioning a signal A method of conditioning a signal being communicated between a system to be controlled and a controller may include monitoring an actual output signal and conditioning the actual output signal. The method also includes determining the difference between the actual o... | 07/18/2006 |
| 7068002 | Motor control device A motor control device comprises: a current limiter 115 for limiting a current-instruction signal Ir for a motor 18 and for turning a limiting signal L from off to on when the current-instruction signal Ir reaches a predetermined value; a model-positio... | 06/27/2006 |
| 7061587 | Control system, lithographic apparatus, device manufacturing method, and device manufactured thereby A control system for a positioning device includes a controller connected in a feedback loop. The controller calculates a current for supply to the positioning device according to the error between a desired current value and a measured current value. This current i... | 06/13/2006 |
| 7005814 | Motor control apparatus having current supply phase correction In a motor-driven shift position switching device, when the difference between a target position and the rotation position of a rotor has become smaller than a prescribed value in a motor feedback control, a transition is made to a deceleration control. A phase lead... | 02/28/2006 |
| 6979967 | Efficiency optimization control for permanent magnet motor drive A method and system for modifying an estimated rotor angle for improved efficiency in a PMSM drive system. A module monitors a run command, a torque command, and an estimated speed; and in response thereto, generates an output correction angle for modifying the esti... | 12/27/2005 |
| 6972534 | Delay compensation for stable current regulation when using variable-delay random PWM switching A control system for an electric machine having a rotor position sensor that generates a rotor position signal, a velocity module that generates an electric angular velocity value based on the rotor position signal, a random pulse width modulation module that genera... | 12/06/2005 |
| 6970761 | Method for actuating a holding brake Based on the realization that, at the instant a holding brake in the drive of a machine tool is actuated, it may not be necessary to precisely observe the setpoint values, it may be provided to adapt control parameters in the controller of the drive such that, given... | 11/29/2005 |
| 6963792 | Surgical method A teleoperator system with telepresence is shown which includes right and left hand controllers (72R and 72L) for control of right and left manipulators (24R and 24L) through use of a servomechanism that includes computer. The teleoperato... | 11/08/2005 |
| 6961628 | Method and apparatus for tuning compensation parameters A method and apparatus for tuning a feedforward compensation parameter in a motion control system is provided. According to one such embodiment, the method includes the acts of determining an initial value of a feedforward compensation parameter and commanding an in... | 11/01/2005 |
| 6955145 | Methods and apparatus for receiving excessive inputs in a VCT system A method that provides increased flexibility to measure dynamic range of a rotating system is provided. The method includes the steps of: providing a first rotating member; providing a second rotating member suitably engaged to the first rotating member; providing a... | 10/18/2005 |
| 6956339 | Multiple hoist synchronization apparatus and method A hoist synchronization apparatus and method using a master controller operating software that provides a pulse reference to a slave controller. The slave commands its motor to rotate at the speed conveyed by that pulse reference. The slave controller monitors the p... | 10/18/2005 |
| 6943523 | Brushless motor control system For self-switching control of a brushless motor (10) powered by means of a predetermined electrical cycle in order to cause the rotor to advance, the control system comprises an indicator device (100) for indicating the mechanical position of the rotor... | 09/13/2005 |
| 6924617 | Position sensorless control algorithm for AC machine A control system for an electric motor having a stator and rotor including an inverter for providing power to the electric motor, a controller for controlling the inverter, a low speed control block to estimate the rotor angular position using stator current compone... | 08/02/2005 |
| 6922025 | Zero ripple linear motor system The present invention relates systems and methods for compensating for errors associated with a linear motion system. The systems and methods determines one or more errors associated with the linear motion system and adjusts or corrects an input drive signal associa... | 07/26/2005 |
| 6877837 | Control unit and method for controlling motor for use in printer, and storage medium storing control program There is provided a control unit capable of rapid and precise stoppage of an object to be driven by a motor for use in a printer. The control unit has a speed control part to control the object by acceleration control, constant speed control, deceleration control, a... | 04/12/2005 |
| 6865499 | Method and apparatus for tuning compensation parameters in a motion control system associated with a mechanical member In one embodiment, a method and machine are provided for tuning compensation parameters in a motion control system associated with a mechanical member. The method includes the steps of receiving an indication of a compensation parameter to be tested, based on the co... | 03/08/2005 |
| 6518721 | Oscillation isolator An oscillation isolator for supporting an oscillation isolation platform on a pedestal includes an active oscillation isolator having a displacement generating type actuator to reduce oscillation of the platform and a displacement adjuster provided betwee... | 02/11/2003 |
| 6424105 | Real-time control of feedback signals to a motor for optimum performance An electric motor that may be used in a remote location, such as in a wellbore for pumping production fluids. The electric motor is designed to permit real-time adjustment of the position feedback signals to optimize motor performance. A position sensor i... | 07/23/2002 |
