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Match Document Document Title
9018863 Rotating electromechanical converter  
Starting from the known rotating electromechanical converter comprising a stator with magnetic circuits and polyphase energizing windings, a first, inner, rotor with magnetic circuits and...
8994307 Selectively lowering resistance of a constantly used portion of motor windings in an electric motor  
Dynamic reconfiguration-switching of motor windings in a motor is optimized between winding-configurations by selectively lowering resistance of a constantly used portion of one of the motor...
8981695 Dynamic reconfiguration-switching of windings in a brushless DC motor  
Dynamic reconfiguration-switching of motor windings is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity upon detecting a brushless DC motor is at an...
8981696 Dynamic reconfiguration-switching of windings in an electric motor in an electric vehicle  
Dynamic reconfiguration-switching of motor windings in an electric motor in an electric vehicle is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity...
8963463 Dynamic reconfiguration-switching of windings in a tape storage drive  
Dynamic reconfiguration-switching of motor windings is optimized between winding-configurations. Acceleration is traded off in favor of higher velocity upon detecting a tape storage drive is at an...
8653771 Controller for motor  
A controller for use with a motor including a stator, around which three-phase coils are wound, and a rotor, which includes a magnet functioning as a first magnetic pole and a salient pole of a...
8648575 Electrical machine safety system  
An electrical machine system including a permanent magnet assembly having a magnetic field and a plurality of conductive coils, the magnet assembly and coils arranged for relative rotation between...
8643319 Control of a brushless motor  
A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, and exciting a winding of the motor with the rectified voltage. The...
8629640 Integrated fan drive system for air-cooled heat exchangers (ACHE)  
An air-cooled heat exchanger (ACHE) for cooling process fluids used in an industrial process. In one embodiment, the ACHE is configured as a forced-draft ACHE. A support structure supports the...
8629639 Brushless direct current motor and driving unit thereof  
A brushless direct current (DC) motor includes a rotor, a stator and a driving unit. The rotor includes a plurality of magnetic poles. The stator includes a plurality of upper pole arms and a...
8629636 Alternating-current electric motor of a combined electric device for powering and charging  
The present invention relates to an alternating-current electric motor of a combined electric device for powering and charging, the said electric motor being formed by a stator connected to an...
8598823 Integrated fan drive system for cooling tower  
A drive system for driving a fan in a wet cooling tower, wherein the fan has a fan hub and fan blades attached to the fan hub. The drive system has a high-torque, low speed permanent magnet motor...
8531146 Robot  
The drive control circuit for an electric motor is provided. The drive control circuit includes: an original drive signal generator that generates an original drive signal; an excitation interval...
8497648 Synchronous electric motor drive system  
The present invention provides a synchronous motor drive system designed to realize reduced vibration and noise along with high output. The system includes: inverters 101, 102, and 103 for...
8368272 Assembly and method for mass torque generation  
An assembly and method for generating mass torque having a frame structure supporting at least one torque generating wheel coupled to a rotational load. The torque generating wheel has peripheral...
8362731 Air gap control systems and methods  
In one embodiment, an apparatus includes a first member that supports a magnetic flux carrying member and a second member that supports a magnetic flux generating member disposed for movement...
8319464 Flux control and one-hundred and eighty degree core systems  
A two-phase or four-phase electric machine includes a first stator part and a second stator part disposed about ninety electrical degrees apart. Stator pole parts are positioned near the first...
8305021 Dual purpose permanent magnet speed sensor and generator  
An apparatus is disclosed for simultaneously measuring the rotational speed and/or direction of a shaft, and providing control power in accordance with the shaft rotation. The apparatus includes a...
8258782 Angle detecting apparatus and angle detecting method  
An angle detecting apparatus includes a rotor fixed to a rotating shaft, a pair of magnetic sensors arranged close to the outer periphery of the rotor so as to have a difference in angle (π/2)...
8188698 Integrated fan drive system for air-cooled heat exchanger (ACHE)  
An integrated fan drive system for air-cooled heat exchangers. The integrated fan drive system has a high-torque, low speed permanent magnet motor having a rotatable shaft, a fan that is directly...
8164286 Method for starting a permanent magnet single-phase synchronous electric motor and electronic device for implementing said method  
Method for starting a single-phase synchronous electric motor using permanent magnets with simple and cost-effective implementation, said method comprising a step of application of a control logic...
8111028 Integrated fan drive system for cooling tower  
An integrated fan drive system for a cooling tower comprising a high-torque, low speed permanent magnet motor having a rotatable shaft, a fan comprising a hub that is directly connected to the...
8080955 Driving method and related driving device for a motor  
A driving method for a motor includes sensing variation of magnetic pole of a rotator of the motor, to generate a magnetic pole sensing signal, determining dead zone of the motor according to the...
8044623 Drive control circuit for electric motor  
The drive control circuit for an electric motor is provided. The drive control circuit includes: an original drive signal generator that generates an original drive signal; an excitation interval...
8030868 Electric motor, power apparatus using the same, and self-propelled snow remover  
A electric motor is disclosed in which torque ripple is reduced. The electric motor includes a single motor shaft. Rotors are disposed so as to be mutually offset in phase, and the rotors are...
8013553 Rotary electric system with neutral-point powering system  
In a rotary electric system, a controller works to turn high-side and low-side switching elements of first and second multiphase inverters on and off to thereby cause: the first multiphase...
8004223 Wheel driving apparatus and electric vehicle including the same  
An electric bike includes a wheel driving apparatus. The wheel driving apparatus includes an electric wheel drive motor which drives a wheel, a gap changer which changes a gap length in the wheel...
7956563 System for using a multi-phase motor with a double-ended inverter system  
Systems and apparatus are provided for an inverter system for use in a vehicle having a first energy source and a second energy source. The inverter system comprises an electric motor having a...
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...
7791294 Starting control apparatus and method for motor  
An exciting coil of a motor is formed to be controlled by using an analog timer, to thus control an excitation control circuit of a motor control apparatus, whereby an excitation control circuit...
7684682 Fan circuit with a fan speed control circuit  
A fan speed control circuit is used for controlling rotation speed of a fan. The fan speed control circuit receives a pulse width modulation (PWM) signal from a system and comprises a programmable...
7657161 Method of transition between controls for a ventilation system  
A method of constant airflow control for a ventilation system is disclosed. The method includes various controls to accomplish a substantially constant airflow rate over a significant change of...
7652440 Switching system for controlling the starting of an electrical motor  
A low cost switching system for an electrical motor, which is speed sensitive, direction of rotation insensitive, load insensitive and voltage fluctuation insensitive. The switch contains a power...
7622875 Controller for motor  
A change in torque produced by a motor having two rotors is reduced when the motor operates in a low-velocity and low-torque operational state. The motor has a first rotor and a second rotor, each...
7541761 Electric motor with integral regulator inductance  
An apparatus and a method of manufacture of a DC electric motor operable over a range of voltage by virtue of a DC-DC regulator having an inductance provided by one or more windings on the stator...
7492117 Electromagnetic variable degrees of freedom actuator systems and methods  
The present invention provides a variable reluctance actuator system and method that can be adapted for simultaneous rotation and translation of a moving element by applying a normal-direction...
7459876 Motors and control methods thereof  
Motors comprising stators and rotors having a plurality of north poles and south poles and methods of controlling the same. A first sensor and a second sensor are provided. The first and second...
7439697 Motor driving device and automobile using the same  
As a boosting-type motor driving device using no reactor, a motor driving device capable of controlling boosting operation and motor driving at the same time is provided, and an automobile using...
7436145 Method and apparatus for controlling brushless DC motors in implantable medical devices  
Methods and apparatus for controlling a polyphase motor in implantable medical device applications are provided. In one embodiment, the polyphase motor is a brushless DC motor. The back emf of a...
7330006 Power tool  
A power tool includes a brushless motor, a cooling fan, and a driving unit in a housing. The brushless motor is provided in the housing and having a rotary shaft. The cooling fan is attached to...
7323834 Synchronous motor control system  
A synchronous motor control system includes a motor including a stator having a plurality of sets of stator teeth and phase coils, a rotor having a plurality of rotor teeth disposed opposite the...
7242121 Brushless motor with speed detector having noise cancel pattern  
A drive/control circuit integrated brushless motor is provided that has high rotating precision, satisfactory noise resistance and high output, and is suited to be smaller to save as much space as...
7157872 Ceiling fan with outer-rotor DC brushless motor  
A ceiling fan with an outer-rotor type DC brushless motor has a center base with multiple blades and a DC brushless motor as a driving source for the fan. The DC brushless motor includes a...
7145308 Floating armature electric motor and method of assembly  
An apparatus for converting electrical energy into mechanical energy includes a plurality of iron segments disposed in a circular, generally donut-shaped body that is substantially non-magnetic,...
7119507 Brushless DC motor and brushless DC motor controller  
A brushless DC motor has a stator and a rotor. An angle θ0 between an edge section of the flux barrier on a magnetic pole center side and an edge section on a side for coming in contact with the...
7095189 Method for controlling a brushless electric motor  
The invention relates to a method for controlling a brushless electric motor for operation within a specified supply voltage range, a motor control controlling the winding voltage by means of...
7081733 Speed control system of fan motor of air conditioner  
A speed control system of a fan motor of an air conditioner is disclosed. A speed control system of a fan motor of an air conditioner comprises: an inverter having a power output terminal...
7075207 Stator of brushless direct current motor  
A stator (1) includes a core member (10) having a central portion (12) with an even number of pole members (14–17) extending radially and outwardly from the central portion, a winding having a...
6982532 Electric machine  
An electric machine having a stator assembly that includes a stator core and a coil supported by the stator core and a rotor assembly that includes a shaft and a rotor supported by the shaft that...
6956713 Magnetic tape apparatus with capstan motor configuration  
In a magnetic tape apparatus, a cylinder motor and a capstan motor are provided separately. A family processing is realized by fabricating a stator core of the capstan motor by using the same die...

Matches 1 - 50 out of 245 1 2 3 4 5 >