Bizarre Patents
Dining Table Having Integral Dishwasher
A space-saving dishwasher, which may be installed within a counter top or table, having a dish-carrying rack that is vertically shiftable through the open top of the dishwasher for facilitating loading and unloading of the dishes.
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| Number | Title | Issue Date |
| 7433762 | Methods for controlling multiple actuators Methods for controlling at least two actuators are provided. An internal control system sends an input received from the main control system to a first actuator and diverts a portion of the input to a second actuator when an input constraint of the first actuator is... | 10/07/2008 |
| 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 |
| 7392113 | Systems for controlling multiple actuators Methods, control systems, and information handling systems for controlling at least two actuators are provided. An internal control system sends an input received from the main control system to a first actuator and diverts a portion of the input to a second actuato... | 06/24/2008 |
| 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 |
| 7298105 | Motor speed estimation system and method using hybrid model reference adaptive system Motor drives, motor speed controllers, motor speed estimation systems, and methods are presented for controlling motor speed and for estimating motor speed, in which a speed estimate controller provides a rotor speed estimate based on a first error term from a torqu... | 11/20/2007 |
| 7193387 | System and method for motor speed estimation using hybrid model reference adaptive system Motor drives, motor speed controllers, motor speed estimation systems, and methods are presented for controlling motor startup speed and for estimating motor speed during startup, in which a speed estimate controller provides a rotor speed estimate based on a first ... | 03/20/2007 |
| 6646397 | Integrated control and diagnostics system 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 t... | 11/11/2003 |
| 6445879 | Apparatus and method for braking a washing machine A method for braking a washing machine in accordance with the present invention comprising the steps of: setting up an initial data of a duty ratio corresponding to a detected speed and a rotating position; discharging a voltage of the capacitor filter du... | 09/03/2002 |
| 6441579 | Current magnitude variation correction for open loop stepper motor driver circuit An available input of to a motor controller is used to measure the motor power supply voltage. Typically, a scaled down version of the voltage is sensed. The microprocessor is used to calculate the motor control current, in that case, is then calculated f... | 08/27/2002 |
| 6366048 | Method and arrangement for regulating the current in a switched reluctance machine A method and an apparatus for regulating the phase current in the windings of a reluctance machine. Regulation is carried out using a digital regulator, which operates using a PI characteristic and presets pulse-width-modulated pulses for a DC chopper con... | 04/02/2002 |
| 6359416 | Adaptive predictive synchronous current frame regulator method and apparatus A method and apparatus for controlling a synchronous frame current regulator wherein the apparatus includes a current predictor and a current predictor adjuster, the current predictor predicting the current provided to a plant from both a forcing function... | 03/19/2002 |
| 6326758 | Integrated diagnostics and control 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 t... | 12/04/2001 |
| 6252369 | Motor speed controller and gain setting method of the controller A motor speed controller with high speed response characteristics. The controller comprises a proportional operating means, a means (1) which controls the angular velocity of a motor, an equivalent rigid body model (21) modelled in a primary delay system ... | 06/26/2001 |
| 6046560 | Electric assist steering system having an improved motor current controller with gain scheduler A motor controller controls the operation of an electric motor (28). The motor controller includes sensors (30, 97, 102) for sensing at least one dynamic operating characteristic of the motor and for providing a signal indicative of the at least one sense... | 04/04/2000 |
| 5998957 | Dissipativity-based controller for synchronous electric drives, and associated methods The invention provides a controller for specifying a drive voltage for synchronous motors relative to a desired speed profile. The controller senses motor current and optionally senses motor rotational position. A motor torque reference is first determine... | 12/07/1999 |
| 5838132 | Stepper-motor control method A device for outputting a suitable rotation torque relative to a load torque or actual torque exerted on a stepper-motor when the stepper-motor is used as a drive of an image processing device. The output torque of the stepper-motor depends on a supply cu... | 11/17/1998 |
| 5737483 | Motor speed control apparatus for motors A motor speed control apparatus is provided in which the controllable frequency band of the control system can be sufficiently enhanced with a comparatively simple structure even if the frequency generator equipped into the motor is low in output frequenc... | 04/07/1998 |
| 5682459 | Speed control for controlling the speed of a DC motor A speed control for controlling the speed of a DC motor provides improved speed regulation during transient loading conditions. The control includes a regulating circuit having an output for controlling the armature voltage to the motor, An input speed re... | 10/28/1997 |
| 5625264 | System for controlling a brushless DC motor A system for controlling a brushless DC motor which can minimize a torque ripple of a motor, thus reducing minute vibrations of the motor and loading devices and increasing efficiency. The system includes a current command generator for producing a curren... | 04/29/1997 |
| 5577153 | High frequency control circuit for DC motors, particularly for washing machines A control circuit for a series type dc motor. The control circuit uses a switching cell to control motor speed. The switching cell and motor receive power from a filtered dc supply. A tachometer generator produces a voltage proportional to motor speed. Th... | 11/19/1996 |
| 5563980 | Brushless DC motor speed controller Provided is a brushless DC motor speed controller in which the speed feedback signal needed for speed control is obtained from the commutation signals generated by the magnetic-pole sensor in the brushless DC motor. The-brushless DC motor speed controller... | 10/08/1996 |
| 5533166 | Method for calculating speed estimated value in speed control system A method for calculating a speed estimated value in a speed control system, comprises the steps of: (a) storing the number of speed detection pulses obtained at each interval of a speed control process and time that the speed detection pulse was obtained;... | 07/02/1996 |
| 5481641 | Motor control apparatus A control apparatus for controlling a motor includes: a command unit for generating a command signal including a running command signal and a stopping command signal; a rotation sensor for generating an AC signal having a period corresponding to a rotatio... | 01/02/1996 |
| 5384526 | PI or PID control loop with self-limiting integrator A control system having proportional and integral functions for controlling the rotational speed of a motor. The system includes a self-limiting integrator for avoiding or limiting integral wrapup, a problem commonly associated with integral control. The ... | 01/24/1995 |
| 5375186 | Device for speed stabilization of a motor employing phase comparison An apparatus for stabilizing the speed of a motor has a phase comparator that identifies a phase difference between a reference signal and a speed signal. The apparatus acquires the speed of the motor and generates an output signal proportional to the ide... | 12/20/1994 |
| 5325460 | System and method for controlling the speed of an electric motor in an extremely low speed range using a rotary pulse encoder A system and method for controlling the speed of a motor operating in an extremely low speed range and having a rotary pulse encoder which outputs a pulse whenever a rotation axle of the motor has rotated through a predetermined angle. The extremely low s... | 06/28/1994 |
| 5278486 | Method of operating slip angular velocity of induction motor The present invention relates to an induction motor, and a method of adjusting slip angular velocity of an induction motor, based on the voltage, current and velocity of the induction motor and compensating the slip angular velocity using vector control o... | 01/11/1994 |
| 5278485 | Control circuit for induction motor A control circuit for an induction motor calculates the d-axis current and q-axis current of a rotor in the motor and estimates the variation of the flux and resistance of the rotor on the basis of the d-q axis currents. As a result, a three-phase current... | 01/11/1994 |
| 5167002 | Electric motor driver control An apparatus and method for reducing synchronous speed variations in an electric motor having a rotating shaft, comprises a speed transducer for generating a continuous analog speed signal corresponding to the speed of the motor shaft including its synchr... | 11/24/1992 |
| 5023924 | Speed control apparatus for movable equipment In order to provide a speed control apparatus for a movable equipment having small torque ripples and speed variation, the present invention has a speed control means which comprises a driver for providing a current or a voltage having a magnitude corresp... | 06/11/1991 |
| 4831317 | Method for controlling a servomotor In a method of controlling a servomotor, a high output can be fetched from the servomotor by a motor-current control unit of a simple construction, while protecting switching elements of the control unit against excess current. The deviation between a com... | 05/16/1989 |
| 4821168 | Control system with improved robustness to disturbances A control system has a detector for obtaining a detected signal corresponding to a controlled variable of a controlled system and a controller for supplying the controlled system with a control signal corresponding to the detected signal. The controller i... | 04/11/1989 |
| 4755729 | Method of controlling a control system with improved robustness to disturbances A control method has a detecting step for obtaining a detected signal corresponding to a controlled variable of a controlled system and a controlling step for supplying the controlled system with a control signal corresponding to the detected signal. The ... | 07/05/1988 |
| 4733144 | Electronic digitized proportional-integral controller A digital proportional-integral controller for controlling the speed of a d.c. electric motor in a copying machine and synchronizing it with the speed of another motor in the copying machine. The proportional stage and the integral stage of the controller... | 03/22/1988 |
| 4733149 | Adaptive control system A real time adaptive control capable of maintaining stable operation with changing inertia. The controller utilizes a pseudo-derivative feedback (PDF) type control wherein dynamic adjustment is achieved by adjusting only a single variable. The variable ca... | 03/22/1988 |
| 4726187 | Circuit arrangement for controlling the speed of rotation of a hydrostatic machine A control for the speed of rotation of a hydrostatic machine in which the controlled variable and generated in a speed controller and is made up of a proportional component and an integrating component is limited by a limiting signal which is also made up... | 02/23/1988 |
| 4716348 | DC motor adaptive controller A method for operating a DC motor controller according to a first gain when the armature current of the DC motor is discontinuous, according to a second gain when the armature current is continuous, and according to a third gain when the armature current ... | 12/29/1987 |
| 4684856 | Method and drive for elevator DC drive motor stabilization A method and device for elevator DC drive motor speed control stabilization system in which current data and speed data are used as feed-back information. The current regulator is approximated by an ideal integrator, and mathematical model thereby obtaine... | 08/04/1987 |
| 4623827 | Device for controlling motor rotation speed A motor speed control device for variably controlling the rotation speed of a motor over a wide range. The control device performs proportional integration (PI) using an actual motor speed and a set motor speed and applies the resulting amount of operatio... | 11/18/1986 |
| 4605885 | Method of controlling rotation speed of motor A method of controlling the rotation speed of a motor to maintain it at a desired value, comprising a step of obtaining a deviation between the detected rotation speed and the desired value, and a step of changing the gain of a feedback loop, which serves... | 08/12/1986 |
