Electricity

Electricity: Motive Power Systems

Pluse Width Modulation Or Chopping

No:4458192

A.c. motor drive apparatus

No:4962976

A.c. motor drive method and apparatus for precision positional control

No:7317292

Ac motor control method and control device

No:6989650

Ac motor control system using parallel integrated sub systems

No:5471125

Ac/dc unity power-factor dc power supply for operating an electric motor

No:5786681

Active phase coil inductance sensing

No:7138781

Adaptive controller for pc cooling fans

No:4926104

Adjustable speed ac drive system control for operation in pulse width modulation and quasi-square wave modes

No:4123692

Adjustable speed electric motor drive having constant harmonic content

No:7034501

Adjusting gate pulse time intervals for reflected wave mitigation

No:7098617

Advanced programmable closed loop fan control method

No:5088297

Air conditioning apparatus

No:3367408

Air conditioning apparatus including motor speed control means therein

No:7276878

Amperage control for protection of battery over current in power tools

No:5349351

Analog-digital converting device

No:6541933

Angle control of modulating wave to reduce reflected wave overvoltage transients

No:7148651

Apparatus and method for controlling ac motor and module therefor

No:7230401

Apparatus and method for controlling an electric motor

No:6166514

Apparatus and method for controlling induction motor

No:6911801

Apparatus and method for controlling inverter for driving a three-phase motor

No:5767654

Apparatus and method for detecting motor position in pwm operation of a polyphase dc motor

No:4295189

Apparatus and method for generating waveforms which are particularly suitable for a pwm-driven motor

No:6552508

Apparatus and method for optimally controlling flux in an ac motor

No:7428157

Apparatus and method for virtually shielding a synchronous switching regulator

No:7372227

Apparatus for braking a synchronous machine

No:5623192

Apparatus for carrying out current control for variable speed driver and method for carrying out current control therefor

No:5162709

Apparatus for controlling blower motor of automobile air-conditioner

No:4788485

Apparatus for controlling electric motor

No:4829416

Apparatus for controlling power transducers of the pulse width modulation (pwm) control type

No:7023173

Apparatus for driving brushless motor and method of controlling the motor

No:6724166

Apparatus for reducing motor driving noise and method for generating motor driving noise reducing signal

No:5814967

Apparatus to reduce no load current at low frequencies

No:5850132

Apparatus used with ac motors for compensating for turn on delay errors

No:5581169

Apparatus used with an inverter/converter eliminating unintended voltage pulses

No:5663626

Applied-voltage fuzzy control process for induction motors and device for performing it

No:7417394

Arrangement for testing a power output stage

No:7348758

Audible noise reduction for single current shunt platform

No:7064511

Autofan combination of zones

No:7385372

Auxiliary bus system

No:6617820

Auxiliary power conversion by phase-controlled rectification

No:7301298

Back emf detection circuit and method for a sensorless brushless dc (bldc) motor

No:4371824

Base drive and overlap protection circuit

No:5789895

Bemf crossing detection in pwm mode operation for sensorless motor control application

No:5457364

Bridge motor driver with short-circuit protection and motor-current limiting feature

No:4544868

Brushless dc motor controller

No:6211635

Brushless motor driving system for driving outdoor fan of air conditioner

No:5761375

Brushless motor speed detection device

No:7053586

Brushless repulsion motor speed control system

No:6528968

Brushless-motor driver in pwm mode

No:7106025

Cancellation of dead time effects for reducing common mode voltages