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Class Information
Number: 318/809
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Frequency control > With voltage phase angle control
Description: Subject matter wherein the voltage supplied to the primary member is a repetitious sinusoidal waveform and the means to regulate the frequency of the voltage supplied to the primary member includes means to regulate the phase angle of the waveform at which the remainder of the waveform of each cycle is applied to the primary member.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7388347 |
Method and inverter for controlling a direct current motor |
Jun. 17, 2008 |
| 7358700 |
Induction motor controller |
Apr. 15, 2008 |
| 7345449 |
Method of rotating a polyphase motor at less than rated speed |
Mar. 18, 2008 |
| 7342380 |
System and method for adjustable carrier waveform generator |
Mar. 11, 2008 |
| 7315147 |
Motor and motor drive system |
Jan. 1, 2008 |
| 7279865 |
Method and apparatus for monitoring motor status using induced motor voltage |
Oct. 9, 2007 |
| 7250740 |
Method and apparatus for generating pulse-width modulated waveform |
Jul. 31, 2007 |
| 7208910 |
Method for modifying baseline circuit architecture for a cycle-skipping control system including computer readable code and controller for performing such method |
Apr. 24, 2007 |
| 7208911 |
Method for controlling a cycle-skipping control system including computer readable code and controller for performing such method |
Apr. 24, 2007 |
| 7129672 |
Controller apparatus for synchronous motor and controlling method thereof |
Oct. 31, 2006 |
| 7106024 |
Filter with increased first harmonic response and reduced phase shift in a wide frequency band for encoderless drive applications |
Sep. 12, 2006 |
| 7102305 |
Apparatus and method for controlling motor |
Sep. 5, 2006 |
| 7064514 |
Motor drive system for AC motors |
Jun. 20, 2006 |
| 7042186 |
Decoupling a harmonic signal from a signal path |
May. 9, 2006 |
| 7042192 |
Switch assembly, electric machine having the switch assembly, and method of controlling the same |
May. 9, 2006 |
| 7034510 |
Method for coupling inverter to alternating voltage |
Apr. 25, 2006 |
| 7034478 |
Digital spindle control architecture |
Apr. 25, 2006 |
| 7023173 |
Apparatus for driving brushless motor and method of controlling the motor |
Apr. 4, 2006 |
| 7023172 |
Motor controller |
Apr. 4, 2006 |
| 7023170 |
Origin offset calculation method of rotational position detecting device of electric motor and motor control device using the calculation method |
Apr. 4, 2006 |
| 7005822 |
Torque ripple reduction for a voltage mode motor controller |
Feb. 28, 2006 |
| 7005828 |
Control device for electric motor |
Feb. 28, 2006 |
| 7005825 |
Motor controller |
Feb. 28, 2006 |
| 6998814 |
Method for measuring the electromotive force constant of motors |
Feb. 14, 2006 |
| 6995532 |
System and method of controlling cooling fan speeds |
Feb. 7, 2006 |
| 6969963 |
PWM controlled motor drive |
Nov. 29, 2005 |
| 6933843 |
Data storage module for a security system |
Aug. 23, 2005 |
| 6922027 |
Method of controlling an electric motor, a system for controlling an electric motor and an electric motor |
Jul. 26, 2005 |
| 6909258 |
Circuit device for driving an AC electric load |
Jun. 21, 2005 |
| 6819077 |
Method and apparatus for reducing sampling related errors in a modulating waveform generator used with a PWM controller |
Nov. 16, 2004 |
| 6803741 |
Motor controller |
Oct. 12, 2004 |
| 6801004 |
System and method of controlling cooling fan speeds |
Oct. 5, 2004 |
| 6781333 |
Drive control apparatus and method of alternating current motor |
Aug. 24, 2004 |
| 6741063 |
Inverter apparatus |
May. 25, 2004 |
| 6731095 |
Controller for multiplex winding motor |
May. 4, 2004 |
| 6710495 |
Multi-phase electric motor with third harmonic current injection |
Mar. 23, 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 |
| 6646411 |
Control method of compressor motor and inverter equipped with the same method |
Nov. 11, 2003 |
| 6636012 |
Stator and rotor resistance identifier using high frequency injection |
Oct. 21, 2003 |
| 6597148 |
Method for controlling an electrical machine and an inverter |
Jul. 22, 2003 |
| 6590362 |
Method and system for early detection of incipient faults in electric motors |
Jul. 8, 2003 |
| 6590361 |
Method and system for controlling an induction machine |
Jul. 8, 2003 |
| 6507166 |
CONTROL DEVICE FOR A WIDE SPEED RANGE INDUCTION MACHINE, CARRYING OUT A CONTROL BASED UPON A FLUX ESTIMATION PERFORMED BY MEANS OF A LUENBERGER STATE OBSERVER, AND METHOD FOR POSITIONING THE E |
Jan. 14, 2003 |
| 6492788 |
Method and apparatus for encoderless operation of a permanent magnet synchronous motor in an elevator |
Dec. 10, 2002 |
| 6472844 |
Single-phased powered drive system |
Oct. 29, 2002 |
| 6473562 |
Method for low-speed operation of brushless DC motors |
Oct. 29, 2002 |
| 6459230 |
Method and system for measuring a parameter of motor operation |
Oct. 1, 2002 |
| 6437535 |
Starting system and method for a microturbine power generation unit |
Aug. 20, 2002 |
| 6404162 |
Variable-speed controlling device for use with an induction motor |
Jun. 11, 2002 |
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