Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7164250 | Open-loop voltage driving of a DC motor The driving voltage of the motor is incremented a quantity proportional to the speed of the motor according to a proportionality factor that is adjusted to compensate the back electromotive force. A method includes open-loop voltage control of a DC motor having a ce... | 01/16/2007 |
| 7095188 | Serial fan set and rotation speed-matching curve generation method thereof A serial fan set and rotation speed-matching curve generation method thereof are provided. The serial fan set comprises a rotation speed control module, a first fan and a second fan, in which the rotation speed control module is used to receive the power signal and ... | 08/22/2006 |
| 6977473 | Travel control method of electric vehicle In a travel control method for an electric vehicle, an accelerator angle is obtained from a position of an accelerator lever. An accelerator percentage is determined in accordance with the accelerator angle. The ON times of first and second brake buttons are read. B... | 12/20/2005 |
| 6734647 | Working machine Control section determines necessary acceleration of a transporting section in accordance with an actual transporting speed, and also determines a correction coefficient corresponding to the number of rotations of an engine from among correction coefficients having ... | 05/11/2004 |
| 6528959 | Driving force control system for front-and-rear wheel drive vehicles There is provided a driving force control system for a front-and-rear wheel drive vehicle, which is capable maintaining an optimum slip condition of the drive wheels even on a low-friction road surface, ensuring a proper grip of rear wheels even on a low-... | 03/04/2003 |
| 6040666 | Machine tool control system and machine tool control method, and detection system and detection method therefor A machine tool has a spindle with a tooling body mounted thereon, a detector for detecting an acceleration time for the tooling body to reach from a rotation start to a predetermined rpm, a controller for controlling an rpm of the spindle under a lowered ... | 03/21/2000 |
| 5426355 | Power-off motor deceleration control system A system (20) for controlling deceleration of a motor (22) during an abrupt power-off condition includes a processor (40), a motor control circuit (50), and a secondary power source (70). During normal power-on operation and based on currently prevailing ... | 06/20/1995 |
| 5216343 | Motor construction and method for limiting spin-up time in a hard disk drive A hard disk drive having a plurality of disks mounted on the rotor of a current limited, electronically commutated dc motor. Windings on the stator of the motor are divided into serially connected run and start sections and first and seconds drive circuit... | 06/01/1993 |
| 5194793 | Control device for controlling a plurality of servo motors and servo motor controlling method A servo motor control device includes a commanding section for outputting a move command signal to drive and control a plurality of servo motors. An interpolating section is provided for performing interpolation based on the move command signal output by ... | 03/16/1993 |
| 4959808 | Method and apparatus for the distance control of a positioning drive A first acceleration reference value is continuously determined by a nonlinear distance control. In parallel thereto, a second acceleration value is generated by a nonlinear velocity controller. A simple selection criterion that comprises only these two a... | 09/25/1990 |
| 4888533 | Brushless DC motor A brushless DC motor useful as a driving source of a refrigerant compressor of a refrigerating apparatus or a fan. A position detecting means generates a control signal by detecting the terminal voltage on input-output terminals current to three-phase rot... | 12/19/1989 |
