| Patent Number |
Title Of Patent |
Date Issued |
| RE38082 |
High frequency pulse transformer for an IGBT gate drive |
April 22, 2003 |
| A pulse transformer for use in a high frequency motor controller to isolate the electronic control stages from the power stages in a motor controller. The primary and secondary windings are wound on a common ferrite core and spaced apart from one another. The wire size used for the windi |
| D338417 |
Portable spectrophotometer |
August 17, 1993 |
|
| 7317269 |
Low voltage electronic motor wire termination |
January 8, 2008 |
| The present invention provides a simple and robust design implementing an easily accessible external terminal connection point for supplying drive current to an AC motor. An embodiment of the invention is directed to an insertion plug and a conductor formed within the insertion plug. |
| 7187305 |
Encoder for a motor controller |
March 6, 2007 |
| An encoder in a motor system measures radial movement and translational movement of a disk with a single integrated sensor disposed on a microprocessor chip. The encoder measures position information and eccentric movement of the disk by the integrated sensor. The measured positional |
| 7105973 |
Highly efficient permanent magnet brushless motor |
September 12, 2006 |
| The present invention provides a highly optimized motor design enabling an increase in torque compared to a similarly sized motor of traditional design. Additionally, the present invention enables motors that provide smooth, ripple free, operation at low speeds. These advances are provid |
| 6998800 |
Current sensor for DC powered three phase motor control system |
February 14, 2006 |
| A system is provided for sensing a motor current from a three phase inverter. A first resistor is coupled between a first transistor of the inverter and a supply voltage, and a second resistor is coupled between a second transistor of the inverter and ground. Circuitry coupled to the |
| 6917049 |
Autotuning method and system based on the bilinear-quadratic filter |
July 12, 2005 |
| A built-in autotuning system of a motor control system provides an autotuning of the motor control system based on BQF. The system measures the effective inertia and determines whether there exists a high-frequency resonance. If there is a high-frequency resonance, the system sets the BQ |
| 6718318 |
System and method for integrating a servo system |
April 6, 2004 |
| The present invention relates to an expert system for recommending a modification to a machine having a servo system. The expert system may be implemented as an unlimited access web site. |
| 6622099 |
Frequency domain auto-tune for an internal motor controller |
September 16, 2003 |
| A built-in auto-tuning system of a motor control system provides an auto-tuning of the motor control system. The built-in tuning system generates and applies a random noise test signal to the controller. In response to the test signals, the tuning system obtains response data such as |
| 6577036 |
Design for frameless cartridge motors |
June 10, 2003 |
| A system and method is disclosed for the construction of a frameless cartridge motor. In accordance with one embodiment of the present invention a frameless cartridge motor is provided such that the motor's rotor is aligned with the motor's stator, a feedback device is calibrated and |
| 6246296 |
Pulse width modulator (PWM) with high duty cycle using bootstrap capacitor |
June 12, 2001 |
| A pulse width modulation (PWM) amplifier of the type including power transistors connected in totem-pole fashion and a bootstrap capacitor used to bias at least one of the power transistors into the conductive state. The improvement wherein the bootstrap capacitor is refreshed only to th |
| 6160327 |
Winding for linear motors without slots |
December 12, 2000 |
| A linear motor utilizing a flat, ironless, coil winding which can be of the printed circuit type (stamped, etched, or deposited and adhered to a rigid substrate). The winding provides coils that are relatively movable between straight, parallel rows of magnets. The winding can also be fa |
| 6118241 |
Dynamic braking system for electric motors |
September 12, 2000 |
| A dynamic braking system for a brushless motor where energization of the motor winding is achieved through a transistor bridge circuit wherein half of the switching transistors are connected to a positive supply and the remaining switching transistors are connected to a negative supply. |
| 6084330 |
Permanent magnet rotor and method of assembly |
July 4, 2000 |
| The invention resides in permanent magnet rotors and methods for assembling the same. In one embodiment, one of more arcuate magnetic elements are disposed around a cylindrical rotor core. In turn, a hollow retaining shell is slip-fit around the magnetic element or elements. Spring biasi |
| 6002234 |
System and method for controlling brushless permanent magnet motors |
December 14, 1999 |
| A system and method of calculating optimum angle advance for brushless permanent magnet motors. The calculations are based on the motor and drive parameters, and on operational variables including the motor speed and the motor load. The angle advance is calculated dynamically as a functi |
| 5998905 |
Slotless electric motor or transducer and method for making same |
December 7, 1999 |
| A method of making a slotless electric motor wherein the active winding segments are adhesively affixed to a support surface or previously deposited active wire segments to form a self-supporting winding structure. The self-supporting structure is then secured in a magnetic structure |
| 5949359 |
Variable reluctance resolver to digital converter |
September 7, 1999 |
| A variable reluctance resolver wherein the sine and cosine values are processed to obtain digital values for position with an accuracy similar to that of a conventional resolver. The variable reluctance resolver is driven at a constant speed and the incremental digital values are recorde |
| 5949015 |
Weapon control system having weapon stabilization |
September 7, 1999 |
| A weapon control system is disclosed which includes system electronics providing control and drive electronics for the weapon control system, a weapon mount for supporting and firing a weapon in accordance with commands from the system electronics, a remote control including a visual |
| 5912638 |
Direct resolver to digital converter |
June 15, 1999 |
| A resolver to digital converter wherein the data from the resolver is processed according to octants which provide the most significant three bits indicating shaft position. The sine and cosine values from the resolver are further processed according to the octant with the smaller va |
| 5829118 |
Method and apparatus for slotless stator manufacturing |
November 3, 1998 |
| A method of producing a slotless wound stator for an electric machine wherein coils are pre-formed and located on the location pins of a transfer tool. The transfer tool with the winding coils thereon is then inserted into the stator shell. Coil guides comb the coils during insertion |
| 5805275 |
Scanning optical rangefinder |
September 8, 1998 |
| A scanning optical rangefinder including an optical scanner and a light source. The optical scanner includes a rotating scan disc with a circular array of concave reflectors thereon. Mirrors are provided for directing light from the light source towards the concave reflectors on the rota |
| 5793514 |
Optical scanner for finite conjugate applications |
August 11, 1998 |
| An optical system providing a rotating scan disc including a circular array of concave reflectors on a planar surface thereof and imaging means adapted to coincide with the scanning sweep of the concave reflectors and separated from the concave reflectors by a distance equal to the focal |
| 5789841 |
Axial air gap brushless motor with layered disk stator |
August 4, 1998 |
| An axial airgap brushless motor including a rotor having a plurality of permanent magnet poles, and a stator having a plurality of conductor layers and a connecting layer for connecting the conductor layers. The motor is operated by exciting the conducting layers with three phase ele |
| 5754732 |
Distributed power supply for high frequency PWM motor controller with IGBT switching transistors |
May 19, 1998 |
| A distributed power supply for a motor controller including electronic control circuits for controlling IGBT power transistor stages. The power supplies for the power transistors and gate drivers therefor are isolated from the power supplies for the electronic control circuits. Each of t |
| 5739648 |
Motor controller for application in a motor controller network |
April 14, 1998 |
| A motor controller that incorporates all of the advantages of RS-485, yet allows the user to interface with the controller through RS-232 without a separate RS-232 to RS-485 converter. The controller includes a port for receiving RS-232 compatible signals. The RS-232 signals are converte |
| 5736916 |
High frequency pulse transformer for an IGBT gate drive |
April 7, 1998 |
| A pulse transformer for use in a high frequency motor controller to isolate the electronic control stages from the power stages in a motor controller. The primary and secondary windings are wound on a common ferrite core and spaced apart from one another. The wire size used for the windi |
| 5715590 |
Apparatus for making a slotless electric motor or transducer |
February 10, 1998 |
| A method of making a slotless electric motor wherein the active winding segments are adhesively affixed to a support surface or previously deposited active wire segments to form a self-supporting winding structure. The self-supporting structure is then secured in a magnetic structure |
| 5680243 |
Optical scanner for finite conjugate applications |
October 21, 1997 |
| An optical system providing a rotating scan disc including a circular array of concave reflectors on a planar surface thereof and imaging means adapted to coincide with the scanning sweep of the concave reflectors and separated from the concave reflectors by a distance equal to the focal |
| 5646467 |
Axial airgap DC motor |
July 8, 1997 |
| An axial air gap motor comprising a housing having a first endplate and an opposed second endplate, a stator assembly mounted within the housing, and a rotor assembly rotatable mounted within the housing. The rotor assembly includes an annular disc shaped armature, wherein the armature i |
| 5625265 |
Compact, high efficiency electronic motor controller with isolated gate drive for power transist |
April 29, 1997 |
| A motor controller operable at a PWM (pulse width modulated) repetition rate above 6,000 Hz. A special saturable transformer with an interwinding capacitance of less than 5 picofarads is used to isolate the electronic control circuits from the power stage. PWM pulses are supplied to the |
| 5557447 |
Optical scanner for finite conjugate applications |
September 17, 1996 |
| An optical system providing a rotating scan disc including a circular array of concave reflectors on a planar surface thereof and imaging means adapted to coincide with the scanning sweep of the concave reflectors and separated from the concave reflectors by a distance equal to the focal |
| 5543920 |
System and method for sensing color and preventing use of unauthorized color formulation softwar |
August 6, 1996 |
| A system and a method for preventing use of unauthorized software contained at a remote location which is to be used with a device having stored information is disclosed. The device includes firmware having a hash code, and a hash function for operating on an initiation string. The devic |
| 5435517 |
Swing arm bracket assembly |
July 25, 1995 |
| A swing arm bracket assembly includes a shaft having a plurality of journals. One end of the shaft connects to a motor drive shaft. Each journal of the shaft has a bearing thereon and is of approximately the same axial length as the bearing. A support member is provided which connect |
| 5407622 |
Process for making metallized plastic articles |
April 18, 1995 |
| Molded, one-piece articles having selected surfaces suitable for adherent metallization, molded, metallized, one-piece articles and processes for making the articles are disclosed. The molded one-piece articles may be formed by: molding into a first mold cavity a first portion of the art |
| 5399908 |
Apparatus and method for forced sharing of parallel MOSFET switching losses |
March 21, 1995 |
| A system for sharing of switching losses of parallel transistors is disclosed. The system includes a plurality of switching transistors connected in parallel for providing a current to a load. A pulse generator provides pulse width modulated pulse cycles in response to the load curre |
| 5365364 |
Optical scanner and printer |
November 15, 1994 |
| An optical system including a scan disc having concave reflectors thereon. As an optical printer, positioned adjacent to the scan disc are a corrector lens, a strip mirror, and a primary mirror. Positioned adjacent to the image plane are a field mirror and a pick-off mirror. Input light |
| 5319437 |
Handheld portable spectrophotometer |
June 7, 1994 |
| A handheld portable spectrophotometer is provided including keys for input of instructions by a user, an illuminator for illuminating a sample, and a spectral analyzer for separating light reflected from the sample into spectral components to produce a signal corresponding to the level o |
| 5268749 |
Apparatus and method for providing uniform illumination of a sample plane |
December 7, 1993 |
| A conical illuminator for use in colorimetry, spectrophotometry, densitometry or sensitometry. In a preferred embodiment, light from a source such as a pulsed xenon lamp is integrated within a integrating chamber. The light source may be placed in a second integrating chamber adjacen |
| 5249157 |
Collision avoidance system |
September 28, 1993 |
| A collision avoidance system particularly suited for automotive applications includes an electro-optical rangefinder scanner, retroreflectors on target vehicles, and a processing unit. The rangefinder supplies data on the range and angle of target vehicles to the processor, which mon |
| 5194786 |
Linear current source amplifier for brushless DC motor |
March 16, 1993 |
| There is provided a linear current source amplifier for brushless DC motors with linear characteristic and low noise at high currents. A servo current loop for comparing a desired current with the actual winding current is provided to produce a global error signal. A plurality of linear |
| 5179423 |
Gain stabilized self-scanning photo-diode array |
January 12, 1993 |
| A method and apparatus for stabilizing the gain of a self scanned photo-diode array is provided for use with spectrophotometers and other light measurement equipment. A gain stabilizer light emitting diode (LED) constantly illuminates the array so that photons are continuously imping |
| 5144183 |
Flat motor of reduced length |
September 1, 1992 |
| There is disclosed a flat motor of reduced length and maximized power output and which is suitable to being disposed in a limited space configuration and a close tolerance within other objects which may be present in such limited space. |
| 5091646 |
Integrated thermal imaging system |
February 25, 1992 |
| A totally integrated thermal imaging system has a dewar housing including imaging optics, a scanning mirror and a curved detector array. The imaging optics constitute a meniscus lens and a spherical focusing mirror. The scanning mirror scans the image, and the spherical mirror focuses th |
| 5051634 |
Motor stator heat spike |
September 24, 1991 |
| An electric motor includes a heat spike within the stator slots which extends radially inward from the stator back iron into the slot between the stator teeth. The heat spike, placed within the stator slots, reduces the heat path length and increases the heat transfer areas to the iron. |
| 5015998 |
Null seeking position sensor |
May 14, 1991 |
| A position sensor includes of two primary sense windings for establishing a forward or drive field, two secondary sense windings in which a voltage may be induced in the presence of the drive field, and at least one conductive screen capable of blocking the magnetic coupling between the |
| 4986124 |
Screened inductance sensors, especially sensors for level measurement |
January 22, 1991 |
| In a screened inductance sensor having a drive winding, a sense winding, and a conductive screen for varying the induced voltage in the sense winding by reason of the eddy currents generated in the conductive screen in the presence of the drive field, a physical barrier is interposed |
| 4981331 |
Low reflection optical reticle and method of making same |
January 1, 1991 |
| An improved optical reticle having a high degree of reflection suppression is provided. In accordance with the preferred embodiment of the invention a fused silica reticle substrate is optically contacted with a fused silica cover plate to yield a sandwich optical reticle having virtuall |
| 4972050 |
Wire scribed circuit boards and methods of their manufacture |
November 20, 1990 |
| The invention concerns an interconnection board for connecting electronic, electro-optical and/or optical devices and methods of manufacturing such boards. The interconnections are formed by scribing electrially or optically conductive filaments to form a signal conductor layer. The |
| 4954739 |
Servo motor with high energy product magnets |
September 4, 1990 |
| A dynamoelectric machine having a large magnetic gap between the rotor and the stator includes a slotless stator windings located within the large magnetic gap, and a mgnetic assembly consisting of radially aligned permanent magnets separated by non-magnetic material. The magnetic pole |
| 4954185 |
Method of applying adherent coating on copper |
September 4, 1990 |
| A method of applying a coating to the inner layers of multilayer boards made of copper. The cured coating is capable of maintaining adhesion without outgassing for at least 10 seconds at 250.degree. C. It can be adhesion promoted for adherent electroless metal deposition with a chromic |
