Peter Willard Hammond
37Patents
22h-index
17Co-inventors
82Inventor score
Filing activity: Mar 15, 1990 → Dec 16, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5986909A | Multiphase power supply with plural series connected cells and failed cell bypass | Emerging Cross-Sectional Technologies | 262 | Expired |
| US5625545A | Medium voltage PWM drive and method | Electricity | 205 | Expired |
| US6087738A | Variable output three-phase transformer | Electricity | 186 | Expired |
| US6236580A | Modular multi-level adjustable supply with series connected active inputs | Electricity | 133 | Expired |
| US5638263A | Low and medium voltage PWM AC/DC power conversion method and apparatus | Electricity | 100 | Expired |
| US6301130A | Modular multi-level adjustable supply with parallel connected active inputs | Electricity | 91 | Expired |
| US5241152A | Circuit for detecting and diverting an electrical arc in a glow discharge apparatus | Electricity | 80 | Expired |
| US6014323A | Multiphase power converter | Electricity | 73 | Expired |
| US6262555A | Apparatus and method to generate braking torque in an AC drive | Electricity | 54 | Expired |
| US5619407A | Autotransformer | Electricity | 52 | Expired |
| US6222284A | Multiphase power supply with series connected power cells with failed cell bypass | Emerging Cross-Sectional Technologies | 50 | Expired |
| US5905642A | Apparatus and method to reduce common mode voltage from current source drives | Electricity | 46 | Expired |
| US6166513A | Four-quadrant AC-AC drive and method | Electricity | 45 | Expired |
| US6313600A | Control method and apparatus for insufficient input voltage in an AC drive | Electricity | 39 | Expired |
| US6417644B2 | Apparatus and method to generate braking torque in an AC drive | Electricity | 33 | Expired |
| US8008923B2 | Method for bypassing a power cell of a power supply | Emerging Cross-Sectional Technologies | 31 | Active |
| US6411530B1 | Drive and power supply with phase shifted carriers | Electricity | 30 | Expired |
| US7568931B2 | Integrated power cell bypass assembly and power supply including same | Electricity | 28 | Active |
| US8093764B2 | Method and system for bypassing a power cell of a power supply | Electricity | 27 | Active |
| US7800254B2 | System for bypassing a power cell of a power supply | Electricity | 25 | Active |
| US5038808A | High frequency ultrasonic system | Emerging Cross-Sectional Technologies | 25 | Expired |
| US8441147B2 | Device and system for bypassing a power cell of a power supply | Electricity | 23 | Active |
| US7511975B2 | System and method for limiting AC inrush current | Emerging Cross-Sectional Technologies | 21 | Active |
| US6762947B2 | Control method and apparatus to reduce current through DC capacitor linking two static converters | Electricity | 16 | Expired |
| US6472851B2 | Hybrid tap-changing transformer with full range of control and high resolution | Physics | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.