Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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| Number | Title | Issue Date |
| 8120302 | Servo control apparatus A servo control apparatus capable of suppressing adverse effects of disturbance, load variation and the like, and realizing robust and high-performance speed control. The apparatus includes both of the following observers: a disturbance observer for adding a disturb... | 02/21/2012 |
| 8040098 | Position controller A position controller includes a position control part that calculates a speed command on the basis of a difference between a position command and a rotation position of a motor, a PI control part that calculates a torque command on the basis of a speed difference b... | 10/18/2011 |
| 8026687 | Operating method for a machine which is driven using a drive, with state identification by means of frequency analysis A machine having a drive that directly or indirectly excites vibrations in the machine over a frequency range when the drive is connected to the power supply. A sensor detects a time-dependent signal that is characteristic of the excited vibrations. The time-depende... | 09/27/2011 |
| 7969112 | Stator resistance adaptation in sensorless PMSM drives A method of estimating stator resistance of a permanent magnet synchronous machine, when the permanent magnet synchronous machine is controlled with an inverter using a control system having an adaptive observer which is augmented with a signal injection, the adapti... | 06/28/2011 |
| 7960936 | Methods and apparatus to lock a phase lock loop to a motor Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and a... | 06/14/2011 |
| 7884566 | Adaptive servo control system and method A system and method of implementing servomechanism control without rate feedback is provided. A position feedback signal is filtered using a non-linear lead-lag filter that has a variable frequency response to thereby generate a compensated position feedback signal.... | 02/08/2011 |
| 7868577 | Electric motor control apparatus In order to simultaneously realize an improvement in disturbance suppression force of an electric motor control apparatus and vibration suppression of a load machine, a velocity control circuit receives a velocity command signal as a target value of velocity of an e... | 01/11/2011 |
| 7859209 | Control device for synchronous motor A control technology for a synchronous motor for suppressing rotational pulsation caused by variation in individuals without making a control algorithm complex is provided. In a motor drive system which is a control device for a synchronous motor, in order to suppre... | 12/28/2010 |
| 7642739 | Device and method for controlling motor A speed direction corrector determines whether a speed Vp corresponding to a manipulated variable Up generated by a position controller is larger than a target speed Vt set in a target speed setting register (Vp>Vt). If Vp≦Vt, the manipulated variable correspondin... | 01/05/2010 |
| 7615960 | Rotation control device, rotation control method and construction machine In stopping a rotary body of an electric rotary excavator (a construction machine), a control-system changing unit of a rotation control device changes a control law from a speed control law to a position control law when a target speed is judged to be smaller than ... | 11/10/2009 |
| 7589488 | Motor control apparatus There is provided a motor control apparatus for setting, changing, resetting a control gain or a notch filter frequency Nf without using a parameter inputting apparatus, considerably reducing a procedure required in adjustment of the gain which has been needed from ... | 09/15/2009 |
| 7538512 | Integrated control and diagnostics systems An integrated control and diagnostics system for a controlled system (e.g., a motor) includes a diagnostics module and a controller coupled to the motor. To optimize operation, the diagnostics information signal is used to modify the control provided by the controll... | 05/26/2009 |
| 7531980 | Aircraft cabin pressure controls: duty cycle offset to compensate for asymmetric motor loading in an open-loop motor control system A cabin pressure control system (CPCS) software control logic modification may boost the voltage applied to a motor by applying a duty cycle offset to compensate for asymmetric motor loading. The motor may be part of an open-loop system for operating a butterfly val... | 05/12/2009 |
| 7495408 | Method for the no-transmitter speed determination of an asynchronous machine A method for the no-transmitter speed determination of an asynchronous machine, comprising the steps which follow: a module for field-oriented regulation calculates the voltages to be applied to the asynchronous machine on the basis of a setpoint for the speed, at l... | 02/24/2009 |
| 7489099 | Electrical drive control device and electrical drive control method An electric drive control apparatus and method calculates a current command value based on an electric machine target torque that represents a target value of a torque of an electric machine; calculates a current deviation between the current command value and a cur... | 02/10/2009 |
| 7446498 | Smart phase lock loop A method and apparatus perform control. A control method according to one embodiment accesses a Hall effect signal; obtains an error signal relating to a system parameter using the Hall effect signal and a reference signal for the system parameter; obtains a calcula... | 11/04/2008 |
| 7436145 | Method and apparatus for controlling brushless DC motors in implantable medical devices Methods and apparatus for controlling a polyphase motor in implantable medical device applications are provided. In one embodiment, the polyphase motor is a brushless DC motor. The back emf of a selected phase of the motor is sampled while a drive voltage or the sel... | 10/14/2008 |
| 7432681 | Scanner system A scanner system includes a servo control unit. A rotation angle of a rotating shaft supporting a mirror is detected, and an error of the detected value with respect to a commanded value is integrated by an integral compensator so that the detected value is able to ... | 10/07/2008 |
| 7425812 | Ramp rate closed-loop control (RRCC) for PC cooling fans A fan controller may be integrated in silicon and may use an embedded microcontroller to implement a digital fan control algorithm. The microcontroller may continually monitor temperature and sample the speed of the controlled fan. The speed of the fan may be compar... | 09/16/2008 |
| 7423406 | Power control of an induction machine Regulation of the active and reactive power of an induction machine in a coordinate system fixed on the winding, wherein a first regulator output variable is generated using a first regulator as a function of a setpoint variable deviation of the active power and a s... | 09/09/2008 |
| 7420350 | Methods and apparatus for an active front steering actuator An active front steering system includes a motor controller configured to compute a position error from a commanded position value and an actual position value, and then enter one of two modes—a commutation enable mode and a commutation freeze mode—depending upo... | 09/02/2008 |
| 7417400 | Motor controller The present invention is a motor control device comprising a control system, the control system being capable of controlling the motor by PWM and having integration means being capable of outputting an integrated value obtained by integrating a deviation between a r... | 08/26/2008 |
| 7414379 | Servo control system A servo control system having a proportional (P) or a proportional plus integral (PI) position controller, which output signal represents an input speed reference signal for a speed close loop system with a speed controller detecting a speed deviation, derived from ... | 08/19/2008 |
| 7395124 | Adaptive motor drive method and apparatus including inertia estimator A method and apparatus for use with a plant drive system that receives a reference command signal and generates a torque command to drive a plant, the method for estimating plant inertia and comprising the steps of providing a reference model that models the plant, ... | 07/01/2008 |
| 7385363 | Linear motor having progressive movement control In a linear motor and its progressive motion or motion control, e.g., for modular transport devices with straight and curved route sections forming a route course, extensive modularity or flexibility of the linear motor may be guaranteed with little expenditure in t... | 06/10/2008 |
| 7375934 | Power converter controlling apparatus and method applying a fault protection scheme in a motor drive system A method and apparatus control a power converter (20) of a motor drive system. The power converter (20) is controlled during a first operating mode by applying a current control scheme, which sets power converter commands to control active and reactive... | 05/20/2008 |
| 7362062 | Surgical machine and method for controlling and/or regulating a surgical machine To improve a surgical machine with a sensorless electric motor comprising a rotor and at least two motor windings, and with a motor controller for controlling and/or regulating the electric motor, so that the electric motor is operable with optimum efficiency at low... | 04/22/2008 |
| 7357025 | Micromachined apparatus with co-linear drive arrays A mass includes a first set of drive fingers interdigitated with a first array of fixed drive fingers and a second set of drive fingers interdigitated with a second array of fixed drive fingers. Each array of fixed drive fingers is affixed to a substrate using a plu... | 04/15/2008 |
| 7347094 | Coupling apparatus for inertial sensors A coupling apparatus allows anti-phase movements of inertial sensor element frames along parallel axes but substantially prevents in-phase movements of the frames. The coupling apparatus includes a bar coupled between first and second sensor element frames and at le... | 03/25/2008 |
| 7339343 | Method for correcting speed feedback in a motor A method for correcting speed feedback in a drive motor by calculating the averages of speed reference and speed measurement for both downward and upward constant-speed travel and then identifying the gain and zero factors and correcting the measured speed measureme... | 03/04/2008 |
| 7336049 | Method and apparatus for adaptive motor speed control A different adaptive control method is used to control a motor during each of two or more phases of motor operation. Thus, in a first phase of motor operation the motor is controlled using a first adaptive control method, in a second phase of motor operation the mot... | 02/26/2008 |
| 7323833 | Voltage mode control with phase advancing for position controlled electric machines A method and system for controlling an electric machine using voltage mode control comprising: receiving a voltage command, the voltage command corresponding to a voltage control command for a position control loop, the position control loop configured to control a ... | 01/29/2008 |
| 7324919 | Apparatus for analysing the condition of a machine An apparatus for analysing the condition of a machine having a rotating shaft, includes: at least one input for receiving measurement data from a sensor for surveying a measuring point of the machine, the measurement data being dependent on rotation of the shaft; an... | 01/29/2008 |
| 7321216 | Motor control apparatus and vehicle steering apparatus using the same This invention provides a motor control apparatus and vehicle steering apparatus capable of determining whether the motor control CPU is normal or abnormal with an inexpensive structure. A monitor circuit 70 of an ECU 50 outputs a trigger signal trg ba... | 01/22/2008 |
| 7316161 | Rotation rate sensor A rotation rate sensor having a substrate and a Coriolis element is proposed, the Coriolis element being situated above a surface of a substrate; the Coriolis element being able to be induced to vibrate in parallel to a first axis (X); an excursion of the Coriolis e... | 01/08/2008 |
| 7313958 | Rotational rate sensor A rotational rate sensor having a substrate and a Coriolis element is proposed, the Coriolis element being situated over a surface of a substrate; a driving arrangement being provided, by which the Coriolis element is induced to vibrations parallel to a first axis; ... | 01/01/2008 |
| 7311570 | Automatic system for adjusting the trim of a motor boat The present invention is a system for automatically controlling the trim of a boat drive thrust on a boat by controlling the trim motor which adjusts the trim angle of the boat drive thrust by pivoting the boat drive thrust relative to the boat. The system includes ... | 12/25/2007 |
| 7302848 | Force compensated comb drive A force compensated comb drive for a microelectromechanical system includes a MEMS mechanism for providing an output signal representative of a physical quantity; a comb drive for actuating the MEMS mechanism; a comb drive circuit for providing a drive signal to the... | 12/04/2007 |
| 7292001 | Gain adjusting method for servo control device An object of this invention is to provide a gain adjusting method in a servo control device to suppress changes according to a place where a machine is located. This invention provides a gain adjusting method for a servo control device providing speed control... | 11/06/2007 |
| 7292000 | Angular velocity measuring device and leg-moving robot An angular velocity measuring device (1) includes a first sensor (2) (vibration gyro) and a second sensor (3) (gas rate gyro). The detection output of the first sensor (2) is inputted to a high pass filter (4). Output of the filter... | 11/06/2007 |
