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Class Information
Number: 318/729
Name: Electricity: motive power systems > Induction motor systems > Power-factor control
Description: Subject matter wherein the system includes means connected to the primary member, the secondary member, or to both to change the electrical angle between the voltage and the current in one or both of the members.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7606011 |
Motor controller with automated input power determination |
Oct. 20, 2009 |
| 7602136 |
Mitigation of harmonic currents and conservation of power in non-linear load systems |
Oct. 13, 2009 |
| 7598692 |
Electric power converter, electric power converter controlling method and electric power converting system |
Oct. 6, 2009 |
| 7583043 |
Apparatus, system, and method for controlling speed of a cooling fan |
Sep. 1, 2009 |
| 7554780 |
Inverter system, AC rotating machine and electric power converter |
Jun. 30, 2009 |
| 7511445 |
Method of manufacture of magnetic induction devices |
Mar. 31, 2009 |
| 7495410 |
Systems and methods for improved motor drive power factor control |
Feb. 24, 2009 |
| 7479915 |
Comparator architecture |
Jan. 20, 2009 |
| 7456600 |
Pulse code width modulation motor drive system |
Nov. 25, 2008 |
| 7420344 |
Intelligent shift paper shredding mechanism and method of automatic shift of the same |
Sep. 2, 2008 |
| 7408319 |
System and method for regenerative energy control when multiple motors share a common power supply |
Aug. 5, 2008 |
| 7368890 |
Power converter with active discharging for improved auto-restart capability |
May. 6, 2008 |
| 7309973 |
Mitigation of harmonic currents and conservation of power in non-linear load systems |
Dec. 18, 2007 |
| 7291994 |
System and method for establishing spindle motor current during cold temperature operation of HDD |
Nov. 6, 2007 |
| 7248015 |
Variable speed motor control circuit |
Jul. 24, 2007 |
| 7215092 |
Radio-linked, bi-directional control system for model electric trains |
May. 8, 2007 |
| 7211985 |
Training device |
May. 1, 2007 |
| 7095208 |
Inverter controller for driving motor and air conditioner using inverter controller |
Aug. 22, 2006 |
| 7095192 |
Rotating electric machine for automotive application |
Aug. 22, 2006 |
| 7053587 |
Apparatus for controlling three-phase AC motor on two-phase modulation technique |
May. 30, 2006 |
| 7049774 |
Apparatus for controlling power factor compensation in inverter control circuit and method thereof |
May. 23, 2006 |
| 7049787 |
Converter circuit with short-circuit current protection |
May. 23, 2006 |
| 7038423 |
Apparatus and method for ride through for AC induction motors |
May. 2, 2006 |
| 6998814 |
Method for measuring the electromotive force constant of motors |
Feb. 14, 2006 |
| 6958589 |
Inverter controller for driving motor and air conditioner using inverter controller |
Oct. 25, 2005 |
| 6914398 |
Rotary machine control |
Jul. 5, 2005 |
| 6906490 |
Starting of switched reluctance generators |
Jun. 14, 2005 |
| 6856115 |
Method of and apparatus for controlling the operation of an induction motor using a model of the induction motor |
Feb. 15, 2005 |
| 6828751 |
Induction motor control system |
Dec. 7, 2004 |
| 6803741 |
Motor controller |
Oct. 12, 2004 |
| 6801013 |
PSC motor system for use in HVAC applications |
Oct. 5, 2004 |
| 6801005 |
Method and apparatus for controlling three-phase power |
Oct. 5, 2004 |
| 6798159 |
VSD control |
Sep. 28, 2004 |
| 6741059 |
Controller for a wound rotor slip ring induction machine |
May. 25, 2004 |
| 6737827 |
Method and apparatus to control input to AC induction motors |
May. 18, 2004 |
| 6693404 |
AC current detecting device for inverter apparatus and AC current detecting method therefor |
Feb. 17, 2004 |
| 6690132 |
Assembly for adjusting mobile elements of furniture |
Feb. 10, 2004 |
| 6667596 |
Method and device for controlling deceleration in an induction machine |
Dec. 23, 2003 |
| 6646896 |
Controller of AC machine |
Nov. 11, 2003 |
| 6636011 |
Induction motor control system |
Oct. 21, 2003 |
| 6636012 |
Stator and rotor resistance identifier using high frequency injection |
Oct. 21, 2003 |
| 6605919 |
Method and apparatus for indirectly measuring induction motor slip to establish speed control |
Aug. 12, 2003 |
| 6559619 |
Energy management controller |
May. 6, 2003 |
| 6545442 |
Apparatus and method for controlling rotation speed of rotor of brushless motor |
Apr. 8, 2003 |
| 6507167 |
Power factor compensation device for motor driving inverter system |
Jan. 14, 2003 |
| 6507161 |
Centrifuge motor control |
Jan. 14, 2003 |
| 6495982 |
Electric motor control |
Dec. 17, 2002 |
| 6489742 |
Efficiency maximizing motor controller and method |
Dec. 3, 2002 |
| 6448735 |
Controller for a wound rotor slip ring induction machine |
Sep. 10, 2002 |
| 6445156 |
Speed control |
Sep. 3, 2002 |
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