| Patent | Date |
|---|
Switched MOV device
Grant 5,621,599 - Larsen , et al. April 15, 1 | 1997-04-15 |
Method and apparatus for achieving current balance in parallel connected switching devices
Grant 5,338,994 - Lezan , et al. August 16, 1 | 1994-08-16 |
Power conversion scheme employing paralleled units
Grant 5,070,440 - Walker December 3, 1 | 1991-12-03 |
Control system for a current source converter supplying an AC bus
Grant 5,041,959 - Walker August 20, 1 | 1991-08-20 |
Method and apparatus for controlling a power converter
Grant 4,994,981 - Walker , et al. February 19, 1 | 1991-02-19 |
Apparatus and method for failure testing of a control turn-off semiconductor
Grant 4,641,231 - Walker , et al. February 3, 1 | 1987-02-03 |
Frequency measurement system
Grant 4,609,990 - Sember , et al. September 2, 1 | 1986-09-02 |
Flux control for induction motor drive using load commutated inverter circuit
Grant 4,607,206 - Sember , et al. August 19, 1 | 1986-08-19 |
Induction motor drive using load commutated inverter circuit
Grant 4,602,198 - Weiss , et al. July 22, 1 | 1986-07-22 |
Capacitance control for a static var generator
Grant 4,602,206 - Walker July 22, 1 | 1986-07-22 |
Excitation current control for induction motor drive using load commutated inverter circuit
Grant 4,600,874 - Tupper , et al. July 15, 1 | 1986-07-15 |
Coordinated load commutated inverter protection system
Grant 4,475,150 - D'Atre , et al. October 2, 1 | 1984-10-02 |
Method and apparatus for determining the resistance of an AC motor stator
Grant 4,451,770 - Boettner , et al. May 29, 1 | 1984-05-29 |
Flux feedback firing control for a load commutated inverter
Grant 4,449,087 - Lippitt , et al. May 15, 1 | 1984-05-15 |
Twelve-pulse operation of a controlled current inverter motor drive
Grant 4,441,064 - Cutler , et al. April 3, 1 | 1984-04-03 |
Cross-tied current regulator for load commutated inverter drives
Grant 4,420,719 - D'Atre , et al. December 13, 1 | 1983-12-13 |
Protective method and apparatus for a controlled current inverter and motor control system
Grant 4,366,427 - Walker , et al. December 28, 1 | 1982-12-28 |
Unintentional impedance detection system
Grant 4,364,007 - Cutler , et al. December 14, 1 | 1982-12-14 |
Controlled current inverter with angle command limit
Grant 4,314,190 - Walker , et al. February 2, 1 | 1982-02-02 |
Apparatus and method for high slip operation of an AC electric motor at substantially zero rotation and substantially zero torque
Grant 4,311,951 - Walker , et al. January 19, 1 | 1982-01-19 |
Method and apparatus for dynamic braking in a motor control system
Grant 4,295,086 - Cutler , et al. October 13, 1 | 1981-10-13 |
Zero rotation and zero torque detector and method for an AC electric motor drive
Grant 4,287,463 - Walker , et al. September 1, 1 | 1981-09-01 |
Apparatus and method for providing a signal proportional to flux in an AC motor for control of motor drive current
Grant 4,280,085 - Cutler , et al. July 21, 1 | 1981-07-21 |
Method and apparatus for a variable frequency inverter system having commutation fault detection and correction capabilities
Grant 4,270,078 - Walker , et al. May 26, 1 | 1981-05-26 |
Inverter power conversion system having improved control scheme
Grant 4,258,416 - Walker , et al. March 24, 1 | 1981-03-24 |
Starting electrodes for solenoidal electric field discharge lamps
Grant 4,253,047 - Walker , et al. February 24, 1 | 1981-02-24 |
Reversible inverter system having improved control scheme
Grant 4,247,890 - Cutler , et al. January 27, 1 | 1981-01-27 |
Method and apparatus for a variable frequency inverter system having commutation fault detection and correction capabilities
Grant 4,238,821 - Walker December 9, 1 | 1980-12-09 |
Controlled current inverter and motor control system
Grant 4,230,979 - Espelage , et al. October 28, 1 | 1980-10-28 |
Reversible variable frequency oscillator for smooth reversing of AC motor drives
Grant 4,227,138 - Espelage , et al. October 7, 1 | 1980-10-07 |
Inverter system including commutation failure prevention scheme
Grant 4,183,081 - Cutler , et al. January 8, 1 | 1980-01-08 |
Control circuit for power converter
Grant 4,164,015 - Espelage , et al. August 7, 1 | 1979-08-07 |
Core configuration for induction ionized lamps
Grant 4,128,785 - Ferro , et al. December 5, 1 | 1978-12-05 |
Circuit for shutting down an inverter
Grant 4,107,771 - Anderson , et al. August 15, 1 | 1978-08-15 |
AC Inverter with constant power output
Grant 4,071,812 - Walker January 31, 1 | 1978-01-31 |
Inverter power supply
Grant 4,070,701 - Harnden, Jr. , et al. January 24, 1 | 1978-01-24 |
Discharge lamp auxiliary circuit with dI/dt switching control
Grant 4,060,752 - Walker November 29, 1 | 1977-11-29 |
Apparatus for starting high pressure gaseous discharge lamps
Grant 4,048,539 - Walker , et al. September 13, 1 | 1977-09-13 |
Rectifier circuits using transistors as rectifying elements
Grant 3,940,682 - Park , et al. February 24, 1 | 1976-02-24 |
Inverter control circuit
Grant 3,930,194 - Walker December 30, 1 | 1975-12-30 |
Rectifier Circuits Using At Least One Multi-winding Transformer In Combination With Transistors Connected In An Inverter Mode And Arranged In A Bridge Configuration
Grant 3,851,240 - Park , et al. November 26, 1 | 1974-11-26 |
Instantaneous Current Control For Static Inverters
Grant 3,750,004 - Walker July 31, 1 | 1973-07-31 |
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