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Class Information
Number: 318/47
Name: Electricity: motive power systems > Plural, diverse or diversely controlled electric motors > Mechanically coupled in fixed ratio of movement > Motors having unlike operating characteristics > Synchronous and nonsynchronous motors
Description: Subject matter in which one or more of the motors is a synchronous motor and one or more others of the motors is a non-synchronous motor.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7298111 |
Method and device for controlling a production unit |
Nov. 20, 2007 |
| 6969969 |
Circuit arrangement for the actuation of an electric-motor drive, in particular a pump drive, in a large domestic appliance |
Nov. 29, 2005 |
| 6943523 |
Brushless motor control system |
Sep. 13, 2005 |
| 6891342 |
Drive apparatus for PWM control of two inductive loads with reduced generation of electrical noise |
May. 10, 2005 |
| 6809484 |
Multiple electronically commutated motor control apparatus and method |
Oct. 26, 2004 |
| 6791294 |
Servo control system |
Sep. 14, 2004 |
| 6020657 |
Power supply for providing instantaneous energy during utility power outages |
Feb. 1, 2000 |
| 5420485 |
Uncoordinated machine initialization system and method |
May. 30, 1995 |
| 5365153 |
AC variable speed driving apparatus and electric vehicle using the same |
Nov. 15, 1994 |
| 5166582 |
Drive arrangement of an open-end spinning machine |
Nov. 24, 1992 |
| 4398562 |
Motorized diverter valve |
Aug. 16, 1983 |
| 4058755 |
Kramer system utilizing a commutatorless motor |
Nov. 15, 1977 |
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