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Class Information
Number: 318/799
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Responsive to motor condition > Responsive to speed or rotation phase angle
Description: Subject matter wherein the means to sense is responsive to the speed or the rotational phase angle of the motor being controlled or a device driven by the motor.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5715792 |
Method for controlling the advance angle of a power engine |
Feb. 10, 1998 |
| 5714861 |
Variable speed control for a hand-held electric power tool |
Feb. 3, 1998 |
| 5710500 |
Motor speed control apparatus using phase-advance based estimated disturbance signal |
Jan. 20, 1998 |
| 5703458 |
Capacitor-type motor speed controller |
Dec. 30, 1997 |
| 5698960 |
Motor servo system |
Dec. 16, 1997 |
| 5694017 |
Time delay compressed synchronous frame controller |
Dec. 2, 1997 |
| 5689170 |
Fail-safe control apparatus for electric vehicle driving motor |
Nov. 18, 1997 |
| 5684377 |
Apparatus for controlling an input power to an induction motor |
Nov. 4, 1997 |
| 5663626 |
Applied-voltage fuzzy control process for induction motors and device for performing it |
Sep. 2, 1997 |
| 5646497 |
Switching arrangement for controlling the rpm of electric motors |
Jul. 8, 1997 |
| 5638387 |
Electrically driven lift truck |
Jun. 10, 1997 |
| 5635806 |
Method and apparatus for temperature monitoring of universal or AC/DC motors |
Jun. 3, 1997 |
| 5627446 |
Induction motor control method |
May. 6, 1997 |
| 5625262 |
System for equalizing the load of a plurality of motors |
Apr. 29, 1997 |
| 5621296 |
Three phase motor conversion and monitoring circuit |
Apr. 15, 1997 |
| 5614817 |
Method and device for determining the real power of a DC electrical drive |
Mar. 25, 1997 |
| 5594312 |
Apparatus having an automatic firing arrangement |
Jan. 14, 1997 |
| 5561355 |
Motor drive apparatus and method of controlling the same |
Oct. 1, 1996 |
| 5561358 |
Variable speed pumping-up generator |
Oct. 1, 1996 |
| 5559418 |
Starting device for single phase induction motor having a start capacitor |
Sep. 24, 1996 |
| 5550450 |
Dead-time effect compensation for pulse-width modulated inverters and converters |
Aug. 27, 1996 |
| 5548198 |
Shared inverter electrical drive system |
Aug. 20, 1996 |
| 5542501 |
Apparatus for controlling an elevator to reduce vibrations created in a linear drive motor |
Aug. 6, 1996 |
| 5543695 |
Medical instrument with programmable torque control |
Aug. 6, 1996 |
| 5534763 |
Methods of and/or apparatus for electronically commutated motor control |
Jul. 9, 1996 |
| 5532571 |
Control apparatus for induction motor |
Jul. 2, 1996 |
| 5502365 |
Driving control apparatus of motor-driven compressor utilized for automobile |
Mar. 26, 1996 |
| 5481641 |
Motor control apparatus |
Jan. 2, 1996 |
| 5477121 |
Procedure and apparatus for compensating the slip of an induction machine |
Dec. 19, 1995 |
| 5473241 |
Method and apparatus for RMS measurements in induction motor without sampling |
Dec. 5, 1995 |
| 5473239 |
Capstan motor drive control device |
Dec. 5, 1995 |
| 5471126 |
Slip frequency control method for induction motors |
Nov. 28, 1995 |
| 5469215 |
Method and apparatus for controlling an electric motor with compensation or torque ripple |
Nov. 21, 1995 |
| 5463300 |
AC motor controller with 180 degree conductive switches |
Oct. 31, 1995 |
| 5442273 |
Drive control apparatus |
Aug. 15, 1995 |
| 5440219 |
Induction motor speed control having improved sensing of motor operative conditions |
Aug. 8, 1995 |
| 5428285 |
Position controller for controlling an electric motor |
Jun. 27, 1995 |
| 5418436 |
Motor starting method and apparatus |
May. 23, 1995 |
| 5412295 |
Abnormality detection circuit for a motor for use in a copier |
May. 2, 1995 |
| 5399953 |
Motor control and drive circuit |
Mar. 21, 1995 |
| 5376870 |
Apparatus for driving a brushless DC motor |
Dec. 27, 1994 |
| 5376872 |
Control device for voltage type pulse width modulation inverter |
Dec. 27, 1994 |
| 5367241 |
Rotation speed detecting apparatus for a motor having an encoder |
Nov. 22, 1994 |
| 5355067 |
Apparatus for controlling a stepping motor used for driving a chemical pump and method of controlling a stepping motor used for driving a chemical pump |
Oct. 11, 1994 |
| 5332956 |
Motor rotation controlling device |
Jul. 26, 1994 |
| 5331267 |
Method for determining motor speed of an induction motor for a hoist |
Jul. 19, 1994 |
| 5329560 |
AGC circuit with non-linear gain for use in PLL circuit |
Jul. 12, 1994 |
| 5323097 |
Method for producing a speed reference signal for crane motor control |
Jun. 21, 1994 |
| 5313549 |
Procedure for filtering the speed feedback signal |
May. 17, 1994 |
| 5309077 |
Apparatus and method for loading a cassette tape in a video equipment |
May. 3, 1994 |
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