U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"I hate what they've done to my child...I would never let my own children watch it. "

Vladimir Zworykin, television pioneer ; Talking about an invention in which he played a critical role.

Newsletter  PatentStorm News

Make the Most of PatentStorm

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest patents by subscribing to an RSS feed.

Got questions? Ask a Patent Expert!

Registered users: Manage your profile, comments and alerts.

 

Class 318/498 - Energized or controlled in predetermined sequence


Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter in which means are provided for energizing
No. of patents: 15
Last issue date: 12/25/2007


NumberTitleIssue Date
7312592Adaptive system for optimizing excitation current waveform profiles for electric motors
An adaptive control system for an electric motor has energization circuitry connected to phase windings of the motor for energization thereof and a controller for generating a control signal corresponding to a profile of an excitation current. The control signal is ...
12/25/2007
7105972Controller and magnetically driven wheel for use in a radial/rotary propulsion system
The radial/rotary propulsion system of the present invention features a flywheel having concentric rings of permanent magnets attached to one or both sides or embedded into the flywheel. These permanent magnets interact with DC powered electromagnets which, when sel...
09/12/2006
6940242Motor control system for dynamically changing motor energization current waveform profiles
A control system is provided for a multiphase motor having a plurality of stator phase components, each stator phase component comprising a phase winding formed on a core element, and a rotor. A plurality of motor control schemes are stored in memory or calculated d...
09/06/2005
6927524Rotary electric motor having separate control modules for respective stator electromagnets
A rotary brushless electric motor is formed within a cylindrical rotor housing structure that surrounds an annular stator ring. The stator is formed of a plurality of individual power modules and corresponding core segments, each module including electrical control ...
08/09/2005
6919700Adaptive control of motor stator current waveform profiles
Subject to user or system selection, one of the motor control schemes is accessed from the memory by a controller for implementation. The controller generates control signals that are applied to energization circuitry for supplying current to the phase windings with...
07/19/2005
6774600Matrix connected driver for multiple two phase motors
A matrix-connected driver for multiple two-phase motors includes circuit rows and columns of input and output connections for the phases of networked two-phase motors. Phases of multiple motors share the same input line and phases of multiple motors share the same o...
08/10/2004
6538408Controls to incorporate three-phase motors into vehicles
A plurality of motors for use in driving accessories on a vehicle, are each powered by three-phase current. A single controller controls the supply three-phase current to the plurality of motors. In another aspect of the invention, pseudothree-phase curre...
03/25/2003
6392378Method for operating and controlling hysteresis motors
In a method of operating and controlling hysteresis motors energized by a three-phase power supply and individually monitored by an operating monitoring system, whereby the effective power output of the individual motors is determined and the three-phase ...
05/21/2002
6373219Motor control system and motor control method
An object of the present invention is to provide a motor control system comprising an R/D converter which is capable of outputting a good phase signal without being affected by the switching noise due to a PWM signal of an inverter and a motor control met...
04/16/2002
5925999Three-speed dual-winding direct current permanent magnet motor method and apparatus
A direct current motor having a primary armature winding, a secondary armature winding and a switching circuit adapted to selectively energize the primary winding and the secondary winding to achieve three-speed motor operation is disclosed. The system is...
07/20/1999
5717316Motive power generating apparatus utilizing energy of permanent magnet
A motive power generating apparatus using magnetic flux from permanent magnets providing higher efficiency and torque is disclosed. An apparatus of one embodiment according to the present invention comprises a ring-shaped stator (10) formed of magnetic ma...
02/10/1998
5663618Driving apparatus for a commutatorless DC motor
A driving apparatus for a commutatorless DC motor decides a next commutation period based on a difference of a reference zero-cross time and an actual zero-cross time such that a rising or falling edge of induced voltage signals is generated at the refere...
09/02/1997
5574340Electrical and electromagnetic rotary motor apparatus and method utilizing self-generated secondary electrical energy
A rotary motor including the combination of an electromagnetically powered first motor and an electrically powered second motor. The first motor and the second motor being mechanically coupled to each other via a common drive shaft for delivery of produce...
11/12/1996
5258697Efficient permanent magnet electric motor
An electric motor, of the type that includes a rotor with permanent magnets and a stator with electromagnets, which operates at high efficiency to produce a high ratio of mechanical power output to electrical power input. During rotor rotation in a first ...
11/02/1993
4091313Current recycling electric motor system
An electric motor system has a plurality of axially aligned stators and a corresponding plurality of axially aligned rotors, carried on the same shaft and angularly disposed relative one another, and a commutating device for causing an overlap in the ener...
05/23/1978
 
Forgot password?
Register here