Famous Patents
The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7531973 | Wizard for configuring a motor drive system An electronic line shaft includes a motor drive and a processing unit operable to execute a wizard for configuring the motor drive. The wizard is operable to receive mechanical characteristic data associated with the motor drive, determine a noise parameter based on... | 05/12/2009 |
| 7482770 | Methods and systems for providing PWM control signals to an electronically commutated motor A method for controlling the operation of an electronically commutated motor (ECM) with an ECM control assembly is described. The method includes applying a single pulse width modulated (PWM) signal to a plurality of inputs of a power output module. The method also ... | 01/27/2009 |
| 7443118 | Method and device for triggering an electric motor The invention relates to a method for triggering an electric motor, in particular, an electrically conducting motor with a rotor, where an emergency run is performed as a function of the presence of at least one erroneous sensor signal. The invention also relates to... | 10/28/2008 |
| 7429840 | Control of an electrical reluctance machine An electrical machine having stator (30) and rotor (31) is disclosed. The motor has field windings (F) and armature windings (A) energized by a suitable power electronic controller (401). A controller (400) sends signals to the power elec... | 09/30/2008 |
| 7408322 | Device for determining constant of rotating machine A device for determining a constant of a rotating machine includes: a test number selector outputting a test number n, selected from 1 to N (N≧2), and outputting a phase signal q determined by a predetermined condition that is previously set based on the test numb... | 08/05/2008 |
| 7408311 | Protection device for electric motor driving devices and corresponding driving device A protection device protects a driving device of an electric motor with at least three phases and at least three windings and the driving device comprises a power stage suitable for driving directly said at least three windings. The driving device is suitable for ac... | 08/05/2008 |
| 7408312 | Control device for permanent magnet synchronous motor A control device for a permanent magnet synchronous motor includes: an inverter 9 for converting inputted DC voltage into AC voltage of variable-voltage and variable-frequency, and driving a motor 14 with the AC voltage; a speed controller 22 fo... | 08/05/2008 |
| 7405916 | Control apparatus of semiconductor switch A control apparatus includes a plurality of load circuits, a power supply wiring line that connects the load circuits to a DC power supply in common, and a counter electromotive force detecting unit that detects counter electromotive force generated on the power sup... | 07/29/2008 |
| 7400101 | Method for detecting rotor angle of DC brushless motor and controller of DC brushless motor A method and an apparatus accurately detect a rotor angle of a DC brushless motor by using a first-order difference of a detected value of a phase current. A periodic signal causing the total sum of output voltages in three control cycles to become zero is superpose... | 07/15/2008 |
| 7400102 | Method for controlling a polyphase voltage inverter The present invention relates to a method for controlling a polyphase voltage inverter the inverter being designed to control a load in terms of pulse width modulation and to be connected upstream to a voltage source via a DC bus and downstream to an electrical load... | 07/15/2008 |
| 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 |
| 7378808 | Electric drive system having DC bus voltage control An electric drive system has a power source and a generator operatively connected to the power source. The generator is configured to produce a power output. The electric drive system also has at least one capacitor configured to store a supply of power. The electri... | 05/27/2008 |
| 7378809 | Controller for controlling an electric machine A controller for an electric machine, in particular for a linear motor, is disclosed. The electric machine or linear motor includes a first machine section with windings and a second machine section with permanent magnets. The controller includes a memory which can ... | 05/27/2008 |
| 7375489 | Apparatus for generating sine waves of electromotive force, rotary switch using the apparatus, and generators using the rotary switch An apparatus generates sine waves of electromotive force (i.e. alternating current) from a battery. The battery includes a given number of cells connected in series. A stator and commutator is formed by a multiple of segments. Each of the segments is connected in se... | 05/20/2008 |
| 7375480 | Method and device for the production of two-channel or multi-channel pulse-width modulated rectangular pulses The invention relates to a method and a device for the production of two-channel or multi-channel pulse-width-modulated rectangular pulses. According to the invention, exactly one pulse is discharged within a period in each channel. The inception of a pulse in relat... | 05/20/2008 |
| 7375486 | Method and circuit for controlling motor speed A method of controlling a rotational speed of a fan motor for a heat generating electronic component includes the following steps: (1) obtaining an original PWM pulse in response to an internal die temperature of the electronic component, the original PWM pulse havi... | 05/20/2008 |
| 7375488 | Brushless repulsion motor speed control system A system for controlling the speed of a brushless repulsion motor having a series of switches mounted on a rotating armature for shorting circumferentially spaced armature coils comprising first stationary signaling means and a plurality of rotating detectors for ac... | 05/20/2008 |
| 7372227 | Apparatus for braking a synchronous machine A method is proposed for braking a synchronous machine 1, with the armature windings (u, v, w) of the synchronous machine 1 being short-circuited, optionally by interposing at least one braking resistor. In order to keep the braking moment constant ove... | 05/13/2008 |
| 7372228 | Electric power tool with memory capability The invention relates to an electric power tool having a control and/or regulating device for an electric motor. It is provided that the control and/or regulating device (4) is assigned an electronic memory element (5) for at least one operating state ... | 05/13/2008 |
| 7365505 | Image forming apparatus using noise-resistant motor control device An apparatus for controlling a rotational motion of a motor is disclosed which includes: a signal generator generating a rotational state signal indicative of a rotational state of the motor; and a controller producing a control signal for controlling the rotational... | 04/29/2008 |
| 7365503 | Hall Effect sensor temperature compensator A system and method for compensating the output of an uncompensated Hall Effect sensor used to monitor an output shaft of an actuator. The actuator includes an output shaft, a magnet coupled to the output shaft, a motor for rotating the output shaft between a first ... | 04/29/2008 |
| 7365510 | Motor spindle control system and method In a method for measuring motor speed and position by detecting the back EMF generated during pole-pair interactions, a separate respective duration of a power phase suppression signal, that is set during back EMF detection, is stored in memory for each respective p... | 04/29/2008 |
| 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 |
| 7362021 | Moisture-proof device for motor A moisture-proof device is provided to be used in a fan having a stator for isolating the stator from moisture. The moisture-proof device includes a first covering part for covering a circuit board of the stator of the motor, and a second covering part connected to ... | 04/22/2008 |
| RE40250 | Pulse width modulation circuit controlling output current of an inverter circuit for motor-driven blower or electric vacuum cleaner The present invention provides a PWM control device wherein a microprocessor detects the rotational position of rotor of a brushless motor with respect to the amount of each current supplied from an inverter circuit for driving the brushless motor to the brushless m... | 04/22/2008 |
| 7363175 | Query based electronic battery tester An electronic battery tester for testing a storage battery provides a test output indicative of a condition of the battery. Electronic measurement circuitry provides a measurement output related to a condition of the battery. The battery condition is determined base... | 04/22/2008 |
| 7362063 | Motor spindle control system and method In a method for measuring motor speed and position by detecting the back-EMF generated during pole-pair interactions, fluctuations of a three-phase motor power supply that may affect back-EMF detection are reduced. One phase of the power supply is tristated for a ce... | 04/22/2008 |
| 7358692 | Alignment method An apparatus includes a motor including a rotor and a coil system comprising a first set of coils, a second set of coils, and a third set of coils; and a switching mechanism that connects the first set of coils and the second set of coils to a first polarity output ... | 04/15/2008 |
| 7358694 | Apparatus and method for determining normal start up of sensorless motor An apparatus and method determine a start-up of a sensorless motor. The apparatus includes an elapsed time determination unit, a motor velocity determination unit and an abnormal start-up determination unit. The elapsed time determination unit determines whether a p... | 04/15/2008 |
| 7358693 | Motor drive control device Disclosed is a motor drive control device which uses mechanical switches configured in an H-bridge shape and can protect the mechanical switches from being damaged and minimize a voltage chattering problem occurring upon switching on and off The motor drive control ... | 04/15/2008 |
| 7359174 | Motion detecting system for use in a safety system for power equipment A woodworking machine including a detection system adapted to detect a dangerous condition between a person and a working portion of the machine is disclosed. The machine includes a reaction system associated with the detection system to cause a predetermined action... | 04/15/2008 |
| 7358699 | Rotating electric machine with built-in control device The invention is intended to obtain a rotating electric machine with a built-in control device in which the control device is kept from receiving heat from a main body of the rotating electric machine and the control device can be cooled in a desirable fashion. A he... | 04/15/2008 |
| 7352143 | Interface circuit, power conversion device, and vehicle-mounted electric machinery system An interface circuit capable of reliably transmitting signal even when there is fluctuation in the potential difference in reference potentials between circuits between which signal transmission is carried out. An interface circuit 4 is comprised of a level s... | 04/01/2008 |
| 7352144 | Motor driving device having MOSFET, MOSFET, and motor having MOSFET Each connection point of three series circuits formed by connecting two MOSFETs in series between positive and negative terminals of a direct-current power source is connected to a driving coil of a motor. The MOSFET is composed of an FET main body, and a parasitic ... | 04/01/2008 |
| 7352145 | Voltage-sensitive oscillator frequency for rotor position detection scheme A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry.... | 04/01/2008 |
| 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 |
| 7348739 | Motor driving apparatus A motor driving apparatus makes a carrier signal of an inverter be synchronized with a carrier signal of a DC/DC converter, and determines a phase difference between both the carrier signals based on a ratio of an input voltage inputted to the DC/DC converter and an... | 03/25/2008 |
| 7348740 | Motor control circuit for forward/reverse rotation A motor control circuit for forward/reverse rotation comprises a driving circuit, a switching circuit and a motor coil winding. The driving circuit has a driving source, a Hall IC and a driving IC. The driving source provides a signal to enable the Hall IC to output... | 03/25/2008 |
| 7345440 | Method for starting single phase BLDCM having asymmetrical air gap A method for starting a motor having a stator, a rotor, a winding and an asymmetrical air gap is accomplished using several steps. The steps include: (a) providing the motor at standstill; (b) exciting the winding for a specific time period with a current impulse ha... | 03/18/2008 |
| 7342339 | Reluctance machine having a non-uniform air gap A reluctance machine includes a stator having a stator core. The stator core includes a central bore and a plurality of stator poles extending inwardly from the stator core. Each of the stator poles includes a stator pole face. The reluctance machine further include... | 03/11/2008 |
