Matches 1 - 50 out of 145 1 2 3 >


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US20140103842 PORTABLE CONTROLLER WITH INTEGRAL POWER SOURCE FOR MECHANICAL CIRCULATION SUPPORT SYSTEMS  
A portable external device for a mechanical circulation support system includes first and second power sources, e.g. batteries and control electronics for redundant uninterrupted operation of an...
US20120098471 ELECTRICAL SYSTEM AND METHOD FOR CONTROLLING AN ELECTRICAL MOTOR  
An electrical system comprising an electrical motor and a method for controlling the electrical motor. The system comprises the electrical motor, a power source connection, a first motor control...
US20150256113 MOTOR DRIVE SYSTEM AND MOTOR CONTROL DEVICE  
A motor drive system is provided with a motor, a torque sensor provided between the motor and a load, and a circuitry that controls driving of the motor. The circuitry is configured to execute...
US20150263653 ELECTRIC PUMP  
An electric pump includes a pump body, a sensorless brushless motor, and a control portion controlling the motor to perform a constant current control and a constant voltage control to discharge a...
US20100033119 RETROFIT MOTOR SYSTEM FOR HEATING, VENTILATION, AND AIR CONDITIONING APPLICATIONS  
A motor control system for heating, ventilation, and air conditioning (HVAC) applications is described. The motor control system includes a thermostat and an electronically commutated motor (ECM)...
US20130069570 PWM Strategy for Reduction of Inverter Hotspot Temperature and Overall Losses  
A PWM strategy can be implemented to reduce device power losses and hotspot temperature in an inverter circuit that drives a synchronous motor. A method includes migrating a phase current from a...
US20080224640 Brake-controllable brushless motor  
A brake-controllable brushless motor has a rotor and a stator having polyphase coils; a polar position detector whereby electric power is supplied to the coil selected by its phase in response to...
US20140028226 BRUSHLESS DIRECT-CURRENT MOTOR AND CONTROL FOR POWER TOOL  
Brushless direct-current (“BLDC”) motor and control for a power tool. A BLDC motor of a power tool is controlled in either a pulse-width modulation (“PWM”) commutation mode or a centerline...
US20120100009 PUMP CONTROL DEVICE AND PUMP DEVICE  
A pump control device for a pump device having a DC brushless motor as a drive source and a flow rate of the pump device is increased and decreased depending on a corresponding increase and...
US20140300300 Method For Controlling A Brushless Electric Motor  
The invention describes a method for controlling a sensorless, brushless DC motor that is controlled via a bridge circuit preferably using pulse width modulation (PWM) having precommutation....
US20090021199 Motor Driving Integrated Circuit  
A motor driving integrated circuit comprising: a speed control circuit configured to control a rotation speed of a motor according to a speed control signal; a detecting circuit configured to...
US20110109253 Motor Controlling Circuit for Multiple Control Modes  
A motor driving circuit has a motor operated with a forward operation, a reverse operation, an inactivating operation, and/or a brake operation under a constant current mode, a constant voltage...
US20150214872 Motor Driving Circuit, Motor Driving System, Electric Power Steering System, Electric Brake System, and Vehicle Driving System  
In order to provide a motor driving circuit in which a portion corresponding to a failed phase can be separated while miniaturization and lower costs are achieved, a motor driving circuit for...
US20090315494 OPTIMIZATION OF MOTOR OPERATION USING A TEST CYCLE  
An electronic control system for a motor uses a test cycle to select an optimum mode of operation from a plurality of available modes of operation. In some embodiments, the test cycle produces...
US20140368138 METHOD OF CONTROLLING A BRUSHLESS PERMANENT-MAGNET MOTOR  
A method of controlling a brushless permanent-magnet motor. The method includes dividing each half of an electrical cycle of the motor into a conduction period followed by a primary freewheel...
US20120081048 MOTOR ABLE TO WORK SYNCHRONOUSLY AND AS INDUCTION MOTOR  
The present invention relates to a motor that acts both as a synchronous motor and as an induction motor, and that comprises a stator (100) having coil windings, a rotor (200), where said rotor is...
US20100019711 Motor with controllable rotor-pole magnetic intensity  
A motor with a controllable rotor-pole magnetic intensity includes an electromagnetic pole rotor of an electromagnetic coil instead of a magnetic pole rotor composed of permanent magnets. The...
US20140288750 METHOD FOR SWITCHING BETWEEN WYE AND DELTA CONFIGURATIONS IN AN ELECTRIC MOTOR  
A method of operating an electric motor having a motor assembly that includes a rotor and a stator. The method includes providing the electric motor in a neutral state, and from the neutral state,...
US20140361716 METHODS AND SYSTEMS FOR AUTOMATIC ROTATION DIRECTION DETERMINATION OF ELECTRONICALLY COMMUTATED MOTOR  
A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower...
US20150008854 Quadrant Change Control in Brushless DC Motors  
A method and apparatus for controlling a change in a quadrant of operation of a brushless direct current motor. A quadrant change in an operation of a motor is identified. In response to...
US20130221880 MOTOR DRIVING CIRCUIT AND MOTOR APPARATUS  
The motor driving circuit includes a driving controlling signal generating circuit that controls a driver with a driving controlling signal. The motor driving circuit includes a detecting circuit...
US20110001442 Electric bicycle drive system with regenerative charging  
Methods and apparatus for reconfiguring a battery and/or an electric motor assembly for an electric bicycle drive system are provided. A battery having a plurality of battery cells in a first...
US20150008855 CONTROLLER FOR A BRUSHLESS MOTOR  
A controller for a brushless motor that is configured to operate in normal mode or under-voltage mode. When operating in normal mode, the controller generates control signals for exciting a...
US20110291596 Method and Apparatus for Controlling Motor Torque  
The subject matter disclosed herein describes a system for controlling torque in a soft starter. In particular, torque ripple is reduced when transitioning between two different operating modes of...
US20120126729 METHOD FOR SENSORLESS OPERATION OF AN ECM, and MOTOR FOR CARRYING OUT  
An electronically commutated motor (ECM) often employs a Hall sensor for reliable operation. Even when a Hall sensor is omitted from a motor having a plurality of stator winding phases (24, 26)...
US20140042941 MATRIX INTEGRATED SEQUENTIAL MAGNETIC ATTRACTION ELECTRIC MACHINE  
The invention discloses a reciprocal radial field electric machine based on the soft magnetic attraction principle, characterized by a plurality of active elements organized as a bi-dimensional...
US20070001634 Bi-directional single-phase fan and motor thereof  
A bi-directional single-phase motor includes a stator, a rotor and a control circuit. The rotor is coupled to the stator and rotates along a first direction or a second direction. The control...
US20110241585 DIRECT-CURRENT TO THREE-PHASE ALTERNATING-CURRENT INVERTER SYSTEM  
A DC to three-phase AC inverter system includes a three-phase motor, an inverter circuit, switching elements, a capacitor, a DC power source and a control circuit. The DC power source is connected...
US20110115419 System and Method for Aligning a Rotor to a Known Position  
A system and method are presented for aligning a rotor in a motor. The motor may include the rotor and a plurality of pairs of electromagnets. One or more pairs of electromagnets may be excited at...
US20140070735 ELECTRIC MOTOR MODE CONTROL  
A vehicle includes one or more inverter-fed electric machines such as permanent magnet synchronous motors. A controller operates an inverter in either six-step mode or PWM mode depending upon...
US20110310714 SENSORLESS MOTOR DRIVE DEVICE  
A sensorless motor drive device has: a first operation mode of generating current waveforms including non-energizing times based on a first rotor position signal generated by detecting zero...
US20110114049 FOUR STROKE SINGLE CYLINDER COMBUSTION ENGINE STARTING SYSTEM  
A four stroke single cylinder combustion engine starting system with an electrical machine is operable as both a generator and a motor. The starting system has a single cylinder four stroke...
US20100109587 AC motor driving circuit and electric car driving circuit  
In an AC motor driving circuit from an AC power supply and a DC power supply, a matrix converter and a power conversion circuit are provided. The matrix converter is connected between an output of...
US20090315493 SINGLE-PHASE BRUSHLESS FORWARD AND REVERSE TURN CONTROL CIRCUIT DEVICE  
A single-phase brushless forward and reverse turn control circuit device is provided, in which a PCB is provided on a stator unit and a rotor unit that are mutually encircled and spaced from each...
US20100308759 Method and Control System for Controlling a Synchronous Electric Machine  
A method of controlling an electric synchronous machine (2) having a stator and a moving part comprises the following steps: operating the machine (2) with a deceleration moment (MP) so that a...
US20140340007 ROTARY ELECTRIC MACHINE CONTROL SYSTEM AND ROTARY ELECTRIC MACHINE CONTROL METHOD  
A rotary electric machine control system includes a rotary electric machine (second motor generator), a number-of-revolutions sensor that measures the number of revolutions per predetermined time...
US20100090629 FLUX CONTROLLED MOTOR MANAGEMENT  
A motor in an electric vehicle can be controlled by receiving at least one of a user input or vehicle information, selecting one of a plurality of available flux modes using at least one of the...
US20100283416 BRUSHLESS MOTOR DEVICE AND CONTROL DEVICE  
A brushless motor device switches between a 120-degree energization method and a 180-degree energization method of advancing an electrical angle by 30 degrees to drive a brushless motor 1...
US20140084824 Sensorless Driving Apparatus and Sensorless Driving Method for Brushless Motor  
The present relates to a sensorless driving apparatus and a sensorless driving method for a brushless motor. In a state that the brushless motor is driven by rectangular waves, when the driving...
US20150015169 ONBOARD MOTOR CONTROLLER  
There is provided an onboard motor controller that starts a failsafe process in short time at a vehicle collision. A control circuit in the motor controller acquires an acceleration detected by an...
US20110101900 METHOD FOR DETERMINING THE INDUCTANCES OF A PERMANENT MAGNET SYNCHRONOUS MACHINE  
The invention relates to a control method implemented in a variable speed drive for determining the inductances (Ld, Lq) of a permanent magnet synchronous machine comprising three phases (a, b,...
US20110156625 MOTOR DRIVING APPARATUS AND METHOD FOR CONTROL OF MOTOR REVOLUTION  
This invention provides a motor driving apparatus that made it possible to reduce torque ripples including those attributed to load variation of the motor and an associated method for control of...
US20110234131 METHOD AND APPARATUS FOR CONTROLLING PULSE-WIDTH MODULATION IN AN ELECTRIC MOTOR  
In a method of controlling current in a control circuit of an electric motor, pulse-width modulation (PWM) pulses are applied to a stator of the electric motor, via a plurality of transistors of...
US20100327787 PERMANENT-MAGNET-TYPE ROTATING ELECTRICAL MACHINE  
The present invention provides a permanent-magnet-type rotating electrical machine capable of realizing variable-speed operation in a wide range from low speed to high speed at high output and...
US20140300302 VEHICLE AND METHOD OF CONTROLLING VEHICLE  
A vehicle includes a motor generator generating driving power for running, and an ECU. The ECU performs driving power variation operation on the motor generator in which the motor generator is...
US20120262098 Method for Operating a Drive Unit, and a Drive Unit  
In a method for operating a drive unit having an electric machine, in a normal operating mode the electric machine is operated with current provided by an inverter on at least two phases, and...
US20090096394 ROTARY ELECTRIC SYSTEM WITH STAR-CONNECTED MULTIPHASE STATOR WINDINGS  
In a rotary electric system, a switch member includes at least one of a first switch and a second switch. The first switch is connected between a neutral point of multiphase stator windings and a...
US20090108781 MOTOR DRIVING APPARATUS, BRUSHLESS MOTOR, AND METHOD FOR DRIVING THE SAME  
A motor driving apparatus has first, second, and third positive-side driving transistors having drains which are supplied with a power supply voltage, first, second, and third negative-side...
US20100253255 WOUND FIELD SYNCHRONOUS MOTOR DRIVE  
A hybrid synchronous motor drive circuit and method operates in one or two or more modes based on the speed of the synchronous machine. In a first mode, the synchronous machine is driven at a...
US20100253254 WOUND FIELD SYNCHRONOUS MOTOR DRIVE  
A hybrid synchronous motor drive circuit and method operates in one or two or more modes based on the speed of the synchronous machine. In a first mode, the synchronous machine is driven at a...

Matches 1 - 50 out of 145 1 2 3 >