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Class Information
Number: 318/109
Name: Electricity: motive power systems > Plural, diverse or diversely controlled electric motors > Plural, diverse or diversely controlled sources of armature (or primary) supply > Diverse sources > Different voltages
Description: Subject matter in which one or more of the sources differs in magnitude from one or more others of the sources.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7345437 |
Rechargeable vacuum with reduced AC voltage |
Mar. 18, 2008 |
| 7289288 |
Disk drive having hybrid spindle speed control and related method |
Oct. 30, 2007 |
| 7268513 |
Motor/generator unit |
Sep. 11, 2007 |
| 7248015 |
Variable speed motor control circuit |
Jul. 24, 2007 |
| 7183728 |
Motor drive system and process |
Feb. 27, 2007 |
| 7164253 |
Motor drive control apparatus |
Jan. 16, 2007 |
| 7119504 |
Protective circuit for reducing electrical disturbances during operation of a DC motor |
Oct. 10, 2006 |
| 7116066 |
Power supply circuit of a high speed electric motor |
Oct. 3, 2006 |
| 7081727 |
Regenerative charging for portable electronic devices |
Jul. 25, 2006 |
| 7045979 |
Multiple-speed electric machine and method of operating the same |
May. 16, 2006 |
| 7034500 |
Electric drive assembly |
Apr. 25, 2006 |
| 6975080 |
Rotating electrical machine for vehicle |
Dec. 13, 2005 |
| 6930460 |
Load driver with power storage unit |
Aug. 16, 2005 |
| 6806671 |
Power supply system and power supply method |
Oct. 19, 2004 |
| 6404151 |
Electric vehicle drive |
Jun. 11, 2002 |
| 6363214 |
System for controlling the motion of an arm carrying a read/write head during load and unload operations |
Mar. 26, 2002 |
| 6094020 |
Disk drive utilizing Bemf of spindle motor to increase VCM voltage during seeks |
Jul. 25, 2000 |
| 5965992 |
Charging capacitor during track following in disk drive to provide increased VCM voltage during a seek |
Oct. 12, 1999 |
| 5811953 |
Motor driving circuit and method |
Sep. 22, 1998 |
| 5780980 |
Electric car drive system provided with hybrid battery and control method |
Jul. 14, 1998 |
| 5764007 |
Micro-processor based motor control integrated circuit including a boost regulated DC-to-DC converter |
Jun. 9, 1998 |
| 5682459 |
Speed control for controlling the speed of a DC motor |
Oct. 28, 1997 |
| 5596236 |
Motor capable of using high or low voltage |
Jan. 21, 1997 |
| 5469040 |
Operating circuit including an oscillating circuit capacitor coupled to an auxiliary winding for an apparatus that measures the unbalance of a rotary member |
Nov. 21, 1995 |
| 5304900 |
Spinning frame |
Apr. 19, 1994 |
| 5097184 |
Battery operated device |
Mar. 17, 1992 |
| 4879498 |
DC motor drive system for reducing start-up current |
Nov. 7, 1989 |
| 4736648 |
Speed control for vehicles for children |
Apr. 12, 1988 |
| 4614901 |
Servo power amplifier having load equalization |
Sep. 30, 1986 |
| 4490624 |
Door control apparatus |
Dec. 25, 1984 |
| 4341982 |
Simultaneous independent control system for electric motors |
Jul. 27, 1982 |
| 4092571 |
Power matching system for a train of individually powered transit vehicles |
May. 30, 1978 |
| 4090119 |
Torque analog of a series wound DC traction motor |
May. 16, 1978 |
| 4023081 |
Plural motor drive system |
May. 10, 1977 |
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