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| Number | Title | Issue Date |
| 8138710 | Power drive of electric motor Some embodiment of the present disclosure provide an electric motor comprising a power drive configured to supply electric power to different components of the motor that operate with different power inputs. The motor is configured to transform the electric power in... | 03/20/2012 |
| 8120306 | Voltage source inverter with a voltage offset Methods and apparatus are provided for operation of a voltage source inverter. A method of operating a voltage source inverter having an output with multiple voltage phases having a DC voltage level, the method comprising sensing a low output frequency condition; de... | 02/21/2012 |
| 7960939 | Fuel/electric drive system A fuel/electric drive system having an internal combustion engine is disclosed, having a generator which is driven by the internal combustion engine and has a first stator winding set, having a first rectifier which is connected to the first stator winding set at th... | 06/14/2011 |
| 7915853 | Motor driving apparatus A system for driving a motor includes first and second rectifier circuits, a direct current (DC) link circuit, an inverter circuit, a voltage booster circuit, and a switch control circuit. When the motor is at a deceleration state, a micro control unit (MCU) outputs... | 03/29/2011 |
| 7898209 | Cleaner and method for driving the same A cleaner that can automatically respond to a change in an AC voltage and a voltage of a battery. In the motor, a motor for rotating a collecting fan is driven by a motor driver. The motor driver drives the motor using a voltage from a voltage selector. The voltage ... | 03/01/2011 |
| 7863854 | Heat-exchange cooling device and power supply circuit driver used therefore A heat exchange cooler capable of eliminating continuous radiation of high-frequency noise waves and reducing the man hour for the installation work, and a power circuit driving device used for it are provided. A commercial power transformer (311), which tran... | 01/04/2011 |
| 7847511 | Cleaner and method for driving the same A cleaner that can have the sufficient capability of collecting pollutant particles by a battery voltage as well as a AC voltage. The cleaner uses a switched reluctance motor to rotate a collecting fan. The switched reluctance motor is driven by a motor driver in on... | 12/07/2010 |
| 7728544 | System and method for controlling input line harmonics in a motor drive A motor drive system is disclosed that includes a power input configured to receive alternating current (AC) power and a rectifier having a switching frequency selected to convert the AC power to direct current (DC) power. The motor drive unit also includes an input... | 06/01/2010 |
| 7477037 | Method for parallel control of series-cell based drives A method for controlling at least two series-cell based drives connected in parallel. The method comprises detecting a failed cell in one of the drives, inhibiting operation of the drive with the failed cell, determining a peak output voltage capability of the drive... | 01/13/2009 |
| 7459879 | Motor controller A control apparatus for an electric motor, in which a current controller giving multiphase voltage commands to a drive circuit for an inverter includes a normal-mode current controller for use in a normal mode, an abnormal-mode current controller for use in an abnor... | 12/02/2008 |
| 7443131 | Control device for electric power steering apparatus A control device for electric power steering apparatus, in which when torque ripples at the time of the rotation of a motor is reduced by simple arithmetic, smooth and safe assist limitation is performed without deteriorating steering feeling, is provided. For this ... | 10/28/2008 |
| 7362162 | Line filter The invention is directed to a network filter that comprises at least one phase input and a protective conductor in which each phase input is connected via a filter inductance to a corresponding phase output, in which the input side of each filter inductance is conn... | 04/22/2008 |
| 7348756 | Advanced current control method and apparatus for a motor drive system An apparatus controls a power converter of an AC motor drive system, the power converter outputting multi-phase AC current to an AC motor. The apparatus comprises: a state selecting unit; and an advanced controller. The state selecting unit selects an operation mode... | 03/25/2008 |
| 7346272 | Anti-trap protection detection based on comparing the duty cycle of a PWM control system In order to create a method and an apparatus for anti-trap protection detection for displaceable window and door elements by means of which faster and more stable adjustment to current physical conditions can be achieved during system actuation, in the system the mo... | 03/18/2008 |
| 7336509 | Method and apparatus for estimating line inductance for PWM rectifier control A rectifier includes a switching circuit and a controller. The switching circuit is coupled between positive and negative buses and a plurality of input voltage sources. The switching circuit includes a plurality of pairs of switching devices. Each pair is associate... | 02/26/2008 |
| 7327134 | Method and system for transformer control A method to balance transformer flux among a plurality of transformers is disclosed. The plurality of transformers is connected to a plurality of converters, each transformer having an associated converter. The method comprises determining a reference flux value, me... | 02/05/2008 |
| 7327117 | PROCESS FOR MEASURING PHASE CURRENTS OF A DEVICE FOR CONTROLLING ELECTRIC MOTORS MADE WITH IMS TECHNOLOGY OR THE LIKE EMBEDDING, FOR SUCH MEASURE, RESISTANCE AND TEMPERATURE CONTROL DEVICE FOR POWER TRANSISTORS The invention is applied to the field of industrial controls for electric motors and more precisely refers to a process for measuring phase currents of an inverter or a DC controller consisting in detecting the temperature of a copper path made with IMS (Insulated M... | 02/05/2008 |
| 7321209 | Power buffering for rotating media storage devices A method and system for buffering power for rotating media devices. A power management circuit includes a power augmentation circuit and a power storage device. The power augmentation circuit is arranged to sense when the storage device motor is accelerating and to ... | 01/22/2008 |
| 7317295 | Electric motor driving system, electric four-wheel drive vehicle, and hybrid vehicle An electric four-wheel drive vehicle includes: an internal combustion engine; a generator for outputting DC electrical power; an inverter for converting DC electrical power, output from the generator, into AC electrical power; and an AC electric motor, which is driv... | 01/08/2008 |
| 7317292 | AC motor control method and control device It is possible to control the DC intermediate voltage to be constant without using a device for returning regenerative resistance or regenerative energy to a power source and to safely continue operation of an AC motor even if an instantaneous stop occurs. An AC mot... | 01/08/2008 |
| 7307404 | Controller for a permanent magnet generator and a generator in combination with such a controller A generator controller for controlling a permanent magnet generator where each phase of the generator is connectable to a DC link via electrically controllable switches, the controller characterised by a data processor adapted to receive a measurement of generator c... | 12/11/2007 |
| 7304451 | Motor control apparatus and method for generating modulation wave instruction of PWM inverter of the same motor control apparatus A motor control apparatus capable of expanding a voltage output and a modulating wave signal generating method for a PWM inverter apparatus of the motor control apparatus, which is controlled by a pulse width modulating signal obtained by comparing a modulating wave... | 12/04/2007 |
| 7301296 | 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 the controll... | 11/27/2007 |
| 7288922 | Control apparatus for automotive alternator having capability to accurately detect temperature of alternator A control apparatus for a vehicle generator includes a switch, a regulator, a fault condition detector, and a PWM signal generator. The switch is selectively turned on and off so as to intermittently excite the generator. The regulator controls on/off operation of t... | 10/30/2007 |
| 7279860 | System and method for evaluating back electromotive force in a motor Methods for evaluating back electromotive force (EMF) in a polyphase motor is described. The methods include monitoring back EMF in the motor after a commutation of the motor, and evaluating the back EMF only after a back EMF event occurs after the commutation of th... | 10/09/2007 |
| 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 |
| 7276870 | Arrangement for overload protection and method for reducing the current consumption in the event of mains voltage fluctuations The arrangement as overload protection for the mains voltage (U) comprises an electric motor (1), a compression unit having a compressor (2), a mains voltage-monitoring unit (3), a device for reducing the load on the motor (1) and a contr... | 10/02/2007 |
| 7274547 | Electrical power supply system and a permanent magnet generator for such a system An electrical power supply system including an engine driven permanent magnet generator (11) operable to produce a variable voltage and high frequency output which is converted by a series train AC/AC conversion circuit (14) into a fixed voltage and re... | 09/25/2007 |
| 7274576 | Power converter with reduced common mode voltage An improved power converter that produces reduced-levels of common-mode voltages, or even entirely eliminates such voltages, is disclosed herein, along with a method of reducing common-mode voltages. In at least some embodiments, the improved power converter is equi... | 09/25/2007 |
| 7262578 | Direct control of an induction motor This invention relates to sensorless control (i.e. without encoder at the motor shaft) of an induction motor (AC asynchronous motor). In particular, the invention comprises a method for a direct measurement of the electromotive forces (EMF) at the stator of the moto... | 08/28/2007 |
| 7259530 | Power output apparatus, motor driving method and computer-readable recording medium having program recorded thereon for allowing computer to execute motor drive control A control CPU generates, in response to a signal STON from a start key, a signal SE at H level and outputs the generated signal to a relay to render system relays ON. Accordingly, a DC power supply is connected between respective neutral points of three-phase coils.... | 08/21/2007 |
| 7248489 | Control of the mains bridge of a frequency converter A method and a system for controlling the mains bridge of a four-quadrant PWM frequency converter provided with a direct-voltage intermediate circuit when power is flowing into the supply network. The mains bridge includes a controlled mains bridge (INU) for rectifi... | 07/24/2007 |
| 7247998 | Transient detection of end of lamp life condition apparatus and method A sensor system adapted to detect unwanted transients in the primary side of a luminous lamp load driving circuit and effect a change in operation of the driving circuit. A detection circuit is adapted to detect a transient, determine if it is an appropriate end-of-... | 07/24/2007 |
| 7239061 | Switching pattern AC induction motor Both the stator core and the rotor core of a switching pattern AC induction motor are fabricated by soft magnetic material laminations or ferrite material, etc., both of which have corresponding frequency characteristic. The rotor is a squirrel cage rotor. Switching... | 07/03/2007 |
| 7227323 | Motor driving apparatus A motor driving apparatus applicable to various types of motor driving apparatuses and having a power storage section for storing a regenerative current and supplying power to an inverter section at the time of acceleration. The motor driving apparatus further compr... | 06/05/2007 |
| 7224133 | Control apparatus, dual chip inverter and single chip inverter of AC motors A control apparatus and a semiconductor apparatus of AC motors capable of reducing torque ripple with a comparatively simple circuit corresponding to a high withstand voltage and capable of driving a motor at high efficiency even when the rotational speed or load ha... | 05/29/2007 |
| 7222050 | Apparatus for determining overheating of motor, method for determining overheating of motor, computer-readable medium, motor control apparatus, motor control method, and printing apparatus A temperature condition of a motor is estimated more accurately based on a drive amount of the motor. An apparatus for determining overheating of a motor, includes: an information obtaining section that obtains information about a drive amount of a motor and informa... | 05/22/2007 |
| 7221117 | Method and system for controlling an electric motor in the event of flux reduction The present invention relates to a method and a system for correcting references (xref), in the case of flux reduction, used in a speed variator for controlling an electric motor M having a three-phase supply, for example of the synchronous or asynchronou... | 05/22/2007 |
| 7215055 | Vehicle A rotating electric machine comprises a stator having stator salient poles, three-phase windings wound around said stator salient poles, a rotor rotatable held inside the said stator, and permanent magnets inserted into said rotor and positioned opposite to said sta... | 05/08/2007 |
| 7212407 | Electrical power converter method and system employing multiple output converters A support may receive one or more power electronic circuits. The support may aid in removing heat from the circuits through fluid circulating through the support. The support, in conjunction with other packaging features may form a shield from both external EMI/RFI ... | 05/01/2007 |
