Quotables
"Man will not fly for 50 years."
Wilbur Wright ; 1901
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 |
| 8125170 | Techniques and apparatus for the measurement of mutual inductance in a switched reluctance machine A system and technique for measuring the mutual inductance in a switched reluctance machine (SRM). In a first example embodiment of the technique, a voltage pulse is applied to primary coil when the machine is stationery. By measuring current in the primary coil and... | 02/28/2012 |
| 8098039 | Generator motor driving device and method for discharging charges from capacitor of generator motor driving device The present invention provides a generator motor driving device that can promptly perform discharging of charges from the capacitor during a maintenance operation, and a capacitor discharge method to be implemented in the generator motor driving device. Power is sup... | 01/17/2012 |
| 8080969 | Torque harmonic reduction control for switched reluctance machines A controller for a switched reluctance machine (SRM) generates current commands that reduce torque harmonics generated by the SRM. The controller monitors the phase currents and rotor position of the SRM to estimate torque generated by the SRM. The current command s... | 12/20/2011 |
| 8076881 | System and method for controlling an electric motor A system. The system includes a first module, a second module communicably connected to the first module, a third module communicably connected to the first module, and a fourth module communicably connected to the third module. The first module is configured for de... | 12/13/2011 |
| 8013563 | 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... | 09/06/2011 |
| 7965053 | Measurement of speed and direction of coasting permanent magnet synchronous motor A method for determining the speed of rotation of an unpowered, coasting electric motor, driven, when powered, by an electronic inverter, and without activating switches of the inverter. The steps include determining an electrical frequency of a back emf signal gene... | 06/21/2011 |
| 7944164 | Method and apparatus for identifying orientation of a stationary rotor in a sensor-less PMSM A method and apparatus for determining rotor position in a stationary rotor of a sensor-less permanent magnet synchronous machine that employs a rotating magnetic field to identify a magnetic axis of the stator without a magnetic direction and then determines magnet... | 05/17/2011 |
| 7923958 | Apparatus and method for driving 2-phase SRM motor An apparatus and method for driving a 2-phase SRM are provided. The method may include initializing 2-phase SRM based on a detected position of a rotor by an initializing sensor at a time of an initial driving, and normally driving the 2-phase SRM based on a detecte... | 04/12/2011 |
| 7923947 | Electromotive power steering Disclosed is an electromotive power steering for a motor vehicle, in which a special type of reluctance motor or series wound motor is used while such an electric motor is electronically commutated. In order to recognize an error condition in the electronic control ... | 04/12/2011 |
| 7906923 | Control apparatus for reluctance type synchronous motor A control apparatus for a reluctance type synchronous motor wherein slit-shaped gaps or a nonmagnetic material are included within a rotor to provide level differences of the magnetic reluctance in a rotating direction, and a permanent magnet is included at a portio... | 03/15/2011 |
| 7902787 | Driving circuit for single-phase switched reluctance motor and driving method thereof Disclosed are a driving circuit for a single-phase SRM and a driving method thereof. The driving circuit for the single-phase SRM includes a switched reluctance motor, a voltage source which supplies energy to the switched reluctance motor, and an inverter circuit w... | 03/08/2011 |
| 7880415 | Control of a brushless electrical machine A brushless electrical machine has at least one phase winding which produces magnetic flux in the machine. A controller controls the flux in the machine with reference to a demanded flux and a stabilisation signal which, in combination, enable the controller to oper... | 02/01/2011 |
| 7852038 | Single switch controlled switched reluctance machine An improved single-switch control circuit for use in a multi-phase switched reluctance machine is provided. The control circuit includes at least first and second phase windings, a switch, a capacitor, and a diode. The capacitor may have a polarity opposite that of ... | 12/14/2010 |
| 7852037 | Induction and switched reluctance motor This application describes a motor designed to operate as a reluctance machine at low speeds and as an induction machine at high speeds. The drive waveform is composed of one or more harmonics to be used to match the reluctance pattern of the stator-rotor, causing t... | 12/14/2010 |
| 7830105 | Electrical machine Embedding electrical machines in gas turbine engines has particular advantages by avoiding the need to provide mechanical connections. However, electrical machines such as switched reluctance electrical machines require relatively large electrical capacitors to acco... | 11/09/2010 |
| 7804269 | Control of an electrical machine A switched reluctance machine has salient poles on the stator and rotor. The windings of the machine are supplied from a converter which provides energization at a chosen rate. The windings of the machine may be energized at the rate at which the rotor poles pass th... | 09/28/2010 |
| 7782007 | Electrodynamic machine control An electrodynamic machine has a winding and a switching arrangement effectively dividing the winding into individually controllable portions. During a first operating condition, current flows through the entire winding in a manner controlled by the switching arrange... | 08/24/2010 |
| 7741803 | Apparatus and method for driving 2-phase SRM Disclosed is an apparatus and method for driving a 2-phase SRM capable of individually performing an initial driving by an initializing sensor and a normal driving by a driving sensor, and capable of controlling a rotation speed of the SRM by delaying a phase signal... | 06/22/2010 |
| 7733052 | Method for controlling a heat engine vehicle driving assembly A control method for a vehicle drive assembly includes applying a conduction angle set point value to a variable reluctance machine. The method also includes regulating the conduction angle set point value by comparing a table set point torque from an angle table an... | 06/08/2010 |
| 7701164 | Control of electrical machines An electrical machine, such as a switched reluctance motor, has a rotor and a controller arranged to energize at least one electrically energizable phase winding in dependence on the angular position of the rotor. The controller may employ a control law table derive... | 04/20/2010 |
| 7675254 | Electric drive for a vehicle Disclosed is an electric drive for a vehicle, which is used as a main drive or a hybrid drive. The electric motor of said drive is embodied as a special type of reluctance motor or series wound motor. The rotor of the reluctance motor and the inverse speed motor is ... | 03/09/2010 |
| 7667427 | 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... | 02/23/2010 |
| 7531982 | Motor drive apparatus capable of accurately estimating demagnetization of permanent magnet motor A map holding unit holds, in the form of a map, a voltage control amount of the q axis in a case where no demagnetization of a permanent magnet motor occurs. Based on a motor revolution number, namely the number of revolutions of the motor provided from a revolution... | 05/12/2009 |
| 7508156 | Electrical machine having a series chopper circuit A controller and a motor assembly having a controller. The controller includes a first switch assembly in a series configuration with the motor, where the first switch assembly has a first transistor, a second switch assembly in a parallel configuration with the mot... | 03/24/2009 |
| 7489100 | Feedforward controller for synchronous reluctance machines The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. Fi... | 02/10/2009 |
| 7443125 | Power conversion apparatus A power conversion apparatus for converting power from an alternating source to dc includes an input stage for receiving power from the alternating source, which includes an input filter, a rectifier for rectifying the alternating signal, a capacitor for storing ene... | 10/28/2008 |
| 7439702 | Application of a switched reluctance motion control system in a chiller system A chiller system includes a switched reluctance motor for powering the compressor of the chiller system. A variable speed drive with a boost converter provides a boosted voltage to the switched reluctance motor. The switched reluctance motor and the compressor may b... | 10/21/2008 |
| 7432677 | Closed-loop rotational control of a brushless dc motor Method and apparatus for controlling a brushless dc motor, such as the type used in a data storage device to rotate data storage media. A sequence of drive pulses is applied to rotate the motor. The sequence is switched from first to second motor commutation states ... | 10/07/2008 |
| 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 |
| 7408318 | Motor drive unit A motor drive unit is adapted to detect a motor lock-up condition (in which an electric motor is accidentally locked during driving) based on the fact that motor drive current increases in that event. Then, a capacitor for generating a voltage signal is charged with... | 08/05/2008 |
| 7394229 | Switched reluctance generator A Switched Reluctance (SR) generator having improved efficiency at low and high speed is disclosed. The SR generator includes a step-up converter for controlling an excitation voltage of an excitation capacitor capable of providing a phase winding with an excitation... | 07/01/2008 |
| 7391180 | Pulse width modulation control circuit for a multimode electrical machine, and a multimode electrical machine equipped with such a control circuit A pulse width modulation (PWM) control circuit for a multimode electrical machine and a multimode electrical machine equipped with such a control circuit, including a configuration circuit that detects the operation mode of the electrical machine and produces a puls... | 06/24/2008 |
| 7388345 | Rotor position detection in an electrical machine An electrical machine is controlled with a combination of a physical rotor position transducer and a software position detection algorithm. The physical transducer has a reduced number of sensors, so that it will only give accurate information at high speeds. The so... | 06/17/2008 |
| 7372232 | Apparatus for drive control, power conversion, and start-up control in a PMBDCM or two-phase SRM drive system A power converter for a switched reluctance motor (SRM) or a permanent magnet brushless direct current (do) motor (PMBDCM) may include a front-end boost partial circuit for connecting with a first phase winding of the motor to form a front-end boost circuit and a ba... | 05/13/2008 |
| 7372224 | System and method for determining barrier motor parameters without using sensors A barrier operator comprises a first measuring apparatus for measuring a current used by a direct current (dc) motor to move a barrier and a second measuring apparatus for measuring a generated voltage of the dc motor. A controller is coupled to the first measuring ... | 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 |
| 7365508 | Motor, actuator and controller thereof A motor comprises: coil on/off switching devices for switching between an on-state wherein current is supplied to the coils, and a first off-state wherein the coil terminals are open-circuited or a second off-state wherein the coil terminals are short-circuited; and... | 04/29/2008 |
| 7365506 | Motor driving device, motor driving method, and motor apparatus A motor driving part has half bridge circuits in which a high potential side drive transistor and a low potential side drive transistor are connected in series to each other, and a connection point therebetween serves as a stator winding driving terminal of each pha... | 04/29/2008 |
| 7362070 | Electric motor control system including position determination and error correction A system for controlling an electric motor includes a controller and a position indicator that provides position information regarding at least one motor component to the controller. The controller utilizes phase relationships indicative of the position information ... | 04/22/2008 |
| 7358698 | Field-winding type of synchronous machine A field-winding type of synchronous machine comprises a stator with an armature winding wound phase by phase, a rotor having a rotor core with a field winding wound, and a circuit enabling an armature current to pass the armature winding, the armature current corres... | 04/15/2008 |
