Bizarre Patents
Decorative Jeweled Wheel Cover
An improved wheel is provided wherein decorative items such as gem stones are embedded in either the wheel surface, a special mounting section attached to the wheel surface, or to a spoke strap that wraps around each spoke and positions embedded gem stones on the outside surface of the spoke.
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| Number | Title | Issue Date |
| 7504798 | Wiper controller and method for controlling wiper A controller for controlling a wiper unit including a wiper and an intermittent wipe cycle setting device for setting an intermittent wipe cycle of the wiper. The cycle setting device is set at a plurality of positions respectively corresponding to different intermi... | 03/17/2009 |
| 7285926 | System and method for locomotive adhesion control A traction control system for controlling an electric traction motor drivingly coupled to a wheel of a tractive vehicle. The traction control system includes means for determining speed of the wheel, means for determining tractive effort of the wheel and a control c... | 10/23/2007 |
| 7164252 | Electrically powered hand tool An electrically powered hand tool is described and which includes a three phase electrical motor having a plurality of poles; an electrical motor drive electrically coupled with the three phase electrical motor; and a source of electrical power which is converted to... | 01/16/2007 |
| 7076340 | Method of controlling speed of synchronous motor, and method of identifying constant of synchronous motor In sensorless vector control performed through use of a rotation speed of a synchronous motor 6 and the position of a rotor, a positive current is caused to flow to a γ axis on the assumption that a “d” axis serving as a true magnetic axis is out of phase with ... | 07/11/2006 |
| 7075255 | Variable speed controller for a family of multi-tap motors A system for variable speed motor control provides continuous variable speed motor controller for each motor or motor application within a family of multi-tap motors while using a single controller. The single controller utilizes a wave chop technique providing vari... | 07/11/2006 |
| 7034500 | Electric drive assembly An electric drive includes a rotatable shaft, a first drive member, and a second drive member, and is supplied with power from a controller. The controller is operable to supply a first power from a power electronics converter, and a second power that is line power.... | 04/25/2006 |
| 6998811 | Compensation method for current-sensor gain errors A method of compensation for current-sensor gain errors in an electric machine drive 14 includes a high frequency carrier signal electrically injected into the electric machine 14. A current-sensor signal of the electric machine 14 is determined... | 02/14/2006 |
| 6961455 | Automatic coil selection of multi-receiver MR data using fast prescan data analysis Automatic coil selection is based on determining an index gauge for a corresponding k-space data line acquired for each preselected coil during a prescan. Reliance on manual coil selection and markers is eliminated by adaptively determining the coils of an MR system... | 11/01/2005 |
| 6900614 | Rotation speed search apparatus for increasing an output voltage of an inverter and method thereof A rotation speed search apparatus for an induction motor includes: a voltage control unit for comparing a rated current of a motor and a current detected from the motor and generating an output voltage; and a frequency control unit for comparing a reference excitati... | 05/31/2005 |
| 6870348 | Rotor resistance adaptation for indirect field oriented control of induction machine An induction machine includes a rotor having rotor flux and a rotor resistance. The induction machine outputs first and second reference current values. A control system includes a first controller that outputs first and second reference voltage values to the induct... | 03/22/2005 |
| 6803740 | Method and apparatus for determining phase current of switched reluctance electric machines A method for determining phase current for each of a plurality of individual phase coils of a switched reluctance machine (SRM) is disclosed. In an exemplary embodiment, the method includes determining the current passing through a first resistive element and a seco... | 10/12/2004 |
| 6208113 | System for controlling the rotation of AC motors The present invention relates to a system for controlling the rotation speed of AC motors, in particular single phase motors. In this case, a controllable electronic switching device is connected upstream of the motor and is actuated by a control unit suc... | 03/27/2001 |
| 6163137 | Rotary induction machine having control of secondary winding impedance A rotary induction machine in which operating characteristics of the machine are controlled by adding impedance elements to the rotor windings in which the impedance elements are stationary and connected to the rotor windings by a rotary transformer.... | 12/19/2000 |
| 5986438 | Rotary induction machine having control of secondary winding impedance A rotary induction machine having wound primary and secondary windings with resistive means connected in series with secondary windings and inductive reactive means connected across said resistive means, with the inductive reactance means and resistive me... | 11/16/1999 |
| 5886498 | Sensorless field orientation control method of an induction machine by high frequency signal injection The present invention is related to the method to find the rotor flux angle from stator voltages and currents by injecting high frequency signal. The injected signal is not rotating one but fluctuating one at a reference frame rotating synchronously to th... | 03/23/1999 |
| 5757162 | Method and apparatus for operating an electric induction motor with a long and lossy extension cord An alternating current induction motor having a multitapped RUN winding and including a controller which automatically determines an instant tap selection in response to changes in applied a.c. electric power voltage level appearing immediately at the mot... | 05/26/1998 |
| 5587643 | Rotary induction machine having control of secondary winding impedance A rotary induction machine having wound primary and secondary windings with capacitive means connected directly across said secondary windings and resistive means connected in series with said secondary windings.... | 12/24/1996 |
| 5446363 | Method of controlling induction motor There is disclosed a method of controlling an induction motor, which controls a primary current of the induction motor on the basis of a magnetic flux component current command i1d *, a torque component current command i1q *, and a s... | 08/29/1995 |
| 5410234 | Motor drive control apparatus A motor drive control apparatus having an electrical power amplifier for supplying an electrical power to a motor, and a current control loop and speed control loop for controlling the drive of the motor, which includes a current feedforward component cal... | 04/25/1995 |
| 4742288 | Control system for AC motor/generator of secondary AC excitation type A control system for controlling the load of an AC motor/generator of secondary AC excitation type connected to a power system in parallel to at least a synchronous machine. The AC motor/generator has the secondary excitation winding thereof controlled in... | 05/03/1988 |
| 4736147 | Method of starting motors by harmonics and electrical motors started by this method The present invention provides a method for starting motors by harmonics for synchronous motors, wound-rotor and cage-rotor asynchronous motors started thereby. During the starting period, according to the present invention, the connection of the stator w... | 04/05/1988 |
| 4721898 | Wound rotor motor control A control for a wound rotor induction motor including shorting switches in a secondary resistance network comprises an input comparator with voltage limiting switched by the rotor voltage, a pulse generator responsive to the input comparator to generate v... | 01/26/1988 |
| 4562397 | Squirrel-cage induction motor A squirrel-cage induction motor comprises a stator having a stator core and stator windings divided into first and second coils with different numbers of poles, and a squirrel-cage rotor including a rotor core and a plurality of rotor conductors embedded ... | 12/31/1985 |
| 4500826 | Variable speed electric induction motors without brushes A variable speed induction motor includes a photo-electric cell which controls the current delivered the rotor induction coils. The control is effectuated by the use of controlled diodes, the control electrodes of which are electrically connected to the p... | 02/19/1985 |
| 4443748 | Method of controlling speed of at least one induction motor and device therefor A method of controlling the speed of an induction motor comprises the steps of feeding a supply voltage to the winding of a motor stator and obtaining a signal proportional to the motor speed by varying the voltage across the winding of a motor rotor befo... | 04/17/1984 |
| 4266175 | Secondary thyristor control for AC wound rotor motors The control system has application to polyphase AC wound rotor motor which employ opposed parallel connected phase controlled thyristors together with series connected fixed resistors in each leg of a delta connected secondary impedance network. The line-... | 05/05/1981 |
