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Class Information
Number: 318/804
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Responsive to motor condition > Responsive to speed or rotation phase angle > With controlled magnetic reactance
Description: Subject matter wherein the circuit connected to the primary member of the motor includes a controlled magnetic reactance.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7187155 |
Leakage inductance saturation compensation for a slip control technique of a motor drive |
Mar. 6, 2007 |
| 7148641 |
Direct current and alternating current motor and generator utilizing a periodic transformation system |
Dec. 12, 2006 |
| 7081734 |
Ride-through method and system for HVACandR chillers |
Jul. 25, 2006 |
| 7034478 |
Digital spindle control architecture |
Apr. 25, 2006 |
| 6969963 |
PWM controlled motor drive |
Nov. 29, 2005 |
| 6940253 |
Method in connection with sensorless induction motors |
Sep. 6, 2005 |
| 6933702 |
Control method and system for motor |
Aug. 23, 2005 |
| 6850030 |
Method and device for controlling currents of synchronous motor |
Feb. 1, 2005 |
| 6836091 |
Servo control device of DC motor |
Dec. 28, 2004 |
| 6815925 |
Systems and methods for electric motor control |
Nov. 9, 2004 |
| 6801013 |
PSC motor system for use in HVAC applications |
Oct. 5, 2004 |
| 6735284 |
System for controlling motor and method for the same |
May. 11, 2004 |
| 6720748 |
Static commissioning method and apparatus to identify rated flux current |
Apr. 13, 2004 |
| 6680599 |
System for limitation of the output current from a speed controller |
Jan. 20, 2004 |
| 6674258 |
Motor driver and motor drive method |
Jan. 6, 2004 |
| 6630809 |
System and method for induction motor control |
Oct. 7, 2003 |
| 6600290 |
Stator flux estimate midpoint correction |
Jul. 29, 2003 |
| 6590361 |
Method and system for controlling an induction machine |
Jul. 8, 2003 |
| 6552508 |
Apparatus and method for optimally controlling flux in an AC motor |
Apr. 22, 2003 |
| 6509711 |
Digital rotor flux observer |
Jan. 21, 2003 |
| 6459230 |
Method and system for measuring a parameter of motor operation |
Oct. 1, 2002 |
| 6456030 |
Synchronous motor control device, electric motor vehicle control device and method of controlling synchronous motor |
Sep. 24, 2002 |
| 6437535 |
Starting system and method for a microturbine power generation unit |
Aug. 20, 2002 |
| 6433506 |
Sensorless control system for induction motor employing direct torque and flux regulation |
Aug. 13, 2002 |
| 6388419 |
Motor control system |
May. 14, 2002 |
| 6335607 |
Method of correcting flux midpoint in flux-controlled alternating current systems |
Jan. 1, 2002 |
| 6335609 |
Method for reducing peak phase current and decreasing staring time for an internal combustion engine having an induction machine |
Jan. 1, 2002 |
| 6316904 |
Speed and rotor time constant estimation for torque control of an induction motor |
Nov. 13, 2001 |
| 6281656 |
Synchronous motor control device electric motor vehicle control device and method of controlling synchronous motor |
Aug. 28, 2001 |
| 6281659 |
Induction motor drive and a parameter estimation method thereof |
Aug. 28, 2001 |
| 6208098 |
Variable frequency drive noise attenuation circuit |
Mar. 27, 2001 |
| 6014006 |
Induction motor control system with speed and flux estimation |
Jan. 11, 2000 |
| 6014007 |
Method and apparatus for starting an AC drive into a rotating motor |
Jan. 11, 2000 |
| 5973474 |
Vector control apparatus method for induction motor using magnetic flux observer of full order |
Oct. 26, 1999 |
| 5959429 |
Variable speed controlling device for induction motor |
Sep. 28, 1999 |
| 5859521 |
Variable speed controller for an AC motor |
Jan. 12, 1999 |
| 5852349 |
Driver circuit apparatus for driving a three-phase motor with a single magneto-sensitive device |
Dec. 22, 1998 |
| 5847534 |
Control system for electric vehicle |
Dec. 8, 1998 |
| 5847524 |
Constant speed control for a motor |
Dec. 8, 1998 |
| 5847535 |
Active electronic damping for step motor |
Dec. 8, 1998 |
| 5838124 |
Systems and methods for braking of actuator and brushless DC motor therein |
Nov. 17, 1998 |
| 5831405 |
High precision fan control/alarm circuit |
Nov. 3, 1998 |
| 5821725 |
Electric current compensation circuit for brushless motors for reducing ripples in output torques during phase change |
Oct. 13, 1998 |
| 5821714 |
Improvements in and relating to motors |
Oct. 13, 1998 |
| 5818187 |
Motor and control for windshield wiper system |
Oct. 6, 1998 |
| 5818180 |
Voice coil motor feedback control circuit |
Oct. 6, 1998 |
| 5801505 |
Disk drive stiction release system |
Sep. 1, 1998 |
| 5796236 |
Slip adjuster for use in electrical motor controllers |
Aug. 18, 1998 |
| 5786681 |
Active phase coil inductance sensing |
Jul. 28, 1998 |
| 5783924 |
Drive system comprising a motor, control means for controlling the motor, apparatus comprising the drive system, and method of controlling the motor |
Jul. 21, 1998 |
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