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| Number | Title | Issue Date |
| 7944158 | Controlled electric motor arrangement for a tension mechanism A field-oriented control method for an electric drive comprising a plurality of electric motors, for implementing a tension mechanism, especially for load cable and/or gearing means, using measurements of a polyphase motor actual current. The measured values are tra... | 05/17/2011 |
| 7432674 | Control system A transmission path delay is set in a shift setting register. A slave unit generates a PRE_ITP signal in response to a timing signal (ITP signal) issued by a master unit. The phase difference between this PRE_ITP signal and the ITP signal unique to the slave unit is... | 10/07/2008 |
| 7417386 | Electronic line shaft A method and assembly for synchronizing machine operations, the assembly comprising a reference generator for generating a speed reference signal and a position reference signal, a plurality of slave units, each slave unit including, a mechanical device, a separate ... | 08/26/2008 |
| 7397211 | Motor control apparatus A motor control apparatus includes a first FG pattern for generating a first induced voltage attendant upon rotation of the rotor of a motor; a second FG pattern for generating a second induced voltage due to noise; a differential amplifier for differentially amplif... | 07/08/2008 |
| 7372220 | Extrusion plant with synchronized drive units, and method of synchronization of drive units In a method for synchronizing drive units, a target value of the speed of each drive unit of a plurality of drive units speed is computed by determining the product of a maximum speed of the drive unit, a unit-dependent normalized ratio value of the drive unit, and ... | 05/13/2008 |
| 7366205 | Method for synchronizing nodes of a communications system The invention relates to a method for synchronizing nodes of a communication system comprising the following steps: receipt of a first synchronization message by a first node, whereby the first synchronization message contains a desired receipt time by a first node;... | 04/29/2008 |
| 7354128 | Printer To make it possible to improve a printing speed. When printing a plurality of printing sheets 14, it is possible to decrease the time for generating correction data by using a pair of correction data values to print the printing sheets 14. There... | 04/08/2008 |
| 7352141 | Device and method to monitor an apparatus An apparatus for monitoring and control of one or more electric motors, including a motor controller, equipped with a soft starter. The soft starter includes memory for storing operations and event data, as well as a human-machine interface for making the event info... | 04/01/2008 |
| RE40165 | Method and device for synchronization control A synchronization control device and a synchronization control method are provided in which it includes controllers Am and As1 of a master section and a slave section for accurately synchronizing rotational frequency and rotation phases of driving electric mo... | 03/25/2008 |
| 7344003 | Elevator control device for plural traction units An elevator control device for controllably driving multiple traction units includes position sensors and current supplies. Each of the current supplies includes a position controller for generating a speed command for the corresponding traction unit based on input ... | 03/18/2008 |
| 7317293 | Displacement control system for a vehicle axle Provided is a motor control circuit in which the circuit structure is not complicated, which has a favorable response to the phase difference signal, and in which the signal variation caused by heat is small. This rotation control circuit of a motor includes: a PWM ... | 01/08/2008 |
| 7304397 | Fuel cell system A fuel cell based system for the generation of electrical energy employs a drive unit that includes at least two electric motors sharing a common rotor which is mechanically coupled to drive a compressor to provide oxidant and/or fuel to a fuel cell. An electrical s... | 12/04/2007 |
| 7276865 | Power output apparatus, motor driving method and computer-readable recording medium having program recorded thereon for allowing computer to execute motor drive control A power output apparatus includes two motor generators, a DC power supply, a relay, three inverters and a control CPU. One of the motor generators includes three-phase coils. The DC power supply is connected via the relay between respective neutral points of the thr... | 10/02/2007 |
| 7271554 | Motor-driving circuit and recording apparatus including the same A motor-driving circuit drives a plurality of motors of different types. The motor-driving circuit includes a plurality of H-bridge circuits for outputting driving signals to the motors, a controller for controlling the plurality of H-bridge circuits, a setting sect... | 09/18/2007 |
| 7268502 | Method and arrangement for controlling the synchronous running of a plurality of electronically commutated motors A method of controlling synchronous running of a plurality of electronically commutated motors (22, 24, 26), each of which includes a stator having a stator winding (40, 42, 44), a permanent-magnet rotor (28, 30, 32), and at least one arrangemen... | 09/11/2007 |
| 7256565 | Wiper system using two wipers A wiper system using two wipers and two wiper motors, which drive the wipers and of which at least one first wiper motor forms a sub-assembly with an electronic control unit. The second wiper motor is a rotary motor having only one sensory system for detecting the a... | 08/14/2007 |
| 7254460 | Numerical control system, and method of establishing communication timing in numerical control system Performing communications between numerical control apparatus 1a and peripheral devices (composed of at least one of a servo amplifier 2a, a spindle amplifier 3a and a remote I/O unit 4a) by connecting a numeri... | 08/07/2007 |
| 7202616 | Synchronous control method and device of the same A synchronous control device which is provided with drive motors and a central control unit generating a synchronous reference signal and with which the drive motor is controlled to rotate synchronously with the synchronous reference signal supplied from the central... | 04/10/2007 |
| 7187142 | Motor drive with velocity noise filter A drive unit for controlling a motor includes a position feedback device and a velocity noise filter. The position feedback device is operable to generate a position signal relating to a position of the motor. The velocity noise filter is coupled to the position fee... | 03/06/2007 |
| 7183668 | Generator with current and voltage abnormality detection A detecting means easily detects the abnormality of a generator having a plurality of power supply units. Each of the power supply units includes one of a plurality of output windings L1 to L4, which are wound independently of each other around single ... | 02/27/2007 |
| 7180261 | Self-synchronous AC servo system for high-speed serial communication A self-synchronous AC servo system is used for high-speed serial communication and has multiple axes control. The system includes a computer sending command to master axis drive and slave axis drive through a transmission line. The master axis drive and slave axis d... | 02/20/2007 |
| 7173395 | Inverter unit grounding method and inverter unit A circuit system that includes a sensor circuit for a sensor that detects the state of a motor is provided in an inverter unit for driving the motor. A 0V of the circuit system is connected with a shield braid of a shielded cable that connects the sensor circuit and... | 02/06/2007 |
| 7148634 | Synchronization device particularly for at least two windshield wipers A synchronization device particularly for at least two windshield wipers, comprising at least two wipers, each of which is composed of a blade that is kinematically connected to an electric motor or gearmotor in order to oscillate between two preset positions; eleme... | 12/12/2006 |
| 7148635 | Motor drive with synchronized timing A motor control system for controlling a motor includes control logic and a motor controller. The control logic is operable to generate a control signal at a first periodic time responsive to a synchronization signal. The motor controller is operable to generate a d... | 12/12/2006 |
| 7135826 | Fan control system A fan control system. The system includes a plurality of fans, each having a control device. One of the fans is designated as a master fan and others are served as slave fans according to a specific designation method, wherein the control device of the master fan ac... | 11/14/2006 |
| 7127880 | Induction coupled variable nozzle A turbofan nacelle includes forward and aft cowls adjoining at a joint, and including an exhaust duct having a main outlet for discharging exhaust. A variable nozzle surrounds the exhaust duct and includes a secondary outlet around the main outlet. A thrust reverser... | 10/31/2006 |
| 7128440 | Color-changing submersible lighting fixture with control circuit responsive to timed interruptions of the power source The lighting fixture includes a housing having an interior cavity and a transparent cover. A color-changing electric light assembly is provided in the interior cavity. The light assembly emits a plurality of different colors of light through the transparent cover an... | 10/31/2006 |
| 7113887 | Method and apparatus for sizing a power processing device serving multiple drive units A method for determining supply requirements for a motor control system includes determining a performance profile for each of a plurality of drive units. A power supply parameter for each drive unit is generated based on the performance profiles. The power supply p... | 09/26/2006 |
| 7102305 | Apparatus and method for controlling motor A motor control apparatus includes a direct-current power source and an inverter circuit, which includes a switching element. The motor control apparatus receives a current command value in every control cycle and calculates a current deviation accumulated value by ... | 09/05/2006 |
| 7097329 | Underwater lighting fixture with color changing electric light assembly An underwater lighting fixture adapted for installation in a wall of a swimming pool. The lighting fixture includes a housing having an interior cavity and a transparent cover. A color changing electric light assembly is provided in the interior cavity. The light as... | 08/29/2006 |
| 7055988 | Submersible lighting fixture with color wheel An underwater lighting fixture adapted for installation in a wall of a swimming pool. The fixture includes a housing having an interior cavity and a transparent cover. A plate is mounted within the housing defines an opening. The plate has a first side facing the tr... | 06/06/2006 |
| 7057361 | Inverter control device and electric vehicle thereof In a discharge control section of an inverter control device, when the connection of the battery and the smoothing capacitor is disconnected by means of a contactor, the charge accumulated on the smoothing capacitor is discharged by applying high-frequency voltage t... | 06/06/2006 |
| 7049784 | Drive voltage generating apparatus and method for controlling the same A first drive voltage generating section corresponds to a first motor, and a second drive voltage generating section corresponds to a second motor. Each of the first drive voltage generating section and the second drive voltage generating section includes switching ... | 05/23/2006 |
| 7039494 | Controller for machine A controller that eliminates an error caused by acceleration/deceleration control, and controls the velocity of drive axes which is not represented by a rectangular coordinate system such that maximum allowable values of velocity, acceleration, and jerk of the drive... | 05/02/2006 |
| 7038421 | Method and system for multiple servo motor control A system for control of a plurality of motors comprising: an inverter including at least three legs, with each leg including two series switching devices configured to receive a command from a controller. The system also includes a first motor operably connected to ... | 05/02/2006 |
| 7031876 | Procedure and device for data transmission between a processing unit and several position measuring instruments A procedure for data transmission between a processing unit and a plurality of position measuring instruments, which are connected to one another in a linear bus topology. Generating a position data request signal from the processing unit and synchronously executing... | 04/18/2006 |
| 7026784 | Inverter An inverter has a measuring part that measures an operating time such as the time interval from when a command to start a specified operation by an associated system until a signal indicating the completion of the operation is received. A comparing part compares thi... | 04/11/2006 |
| 7024257 | System for motion control, method of using the system for motion control, and computer-readable instructions for use with the system for motion control A motion control system and method that includes a central controller configured to generate first and second demand control signals to be used to define actuation motion of respective first and second actuators. The central controller is in communication with first... | 04/04/2006 |
| 7009355 | Wiper control system for a vehicle and a method thereof A wiper control system is provided which comprises a rain droplet detector, a multiplexer, a count register, and a wiper control unit. The rain droplet detector has a plurality of switches that are configured to be electrically connected by rain droplets, and each s... | 03/07/2006 |
| 6996482 | Device and method for determining the position of a rotor The invention relates to a device and a method for determining an electrical starting rotor angle of an electromotor. According to the invention, the electromotor (10) is subjected to an approximately sinusoidal voltage and the corresponding current path (i) ... | 02/07/2006 |
