Charles Michael Stephens
26Patents
15h-index
36Co-inventors
81Inventor score
Filing activity: Dec 18, 1985 → Nov 21, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6445105B1 | Axial flux machine and method of fabrication | Electricity | 95 | Expired |
| US4896089A | Fault management system for a switched reluctance motor | Physics | 86 | Expired |
| US5796194A | Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor | Electricity | 67 | Expired |
| US5986419A | Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor | Electricity | 66 | Expired |
| US4959596A | Switched reluctance motor drive system and laundering apparatus employing same | Textiles; Paper | 64 | Expired |
| US5773908A | Single phase motor with positive torque parking positions | Electricity | 54 | Expired |
| US5838127A | Single phase motor for laundering apparatus | Electricity | 50 | Expired |
| US6777847B1 | Rotor core utilizing laminations having slots with dual direction skew portions | Electricity | 41 | Expired |
| USRE37576E1 | Single phase motor with positive torque parking positions | General | 40 | Expired |
| US5166591A | Current chopping strategy for generating action in switched reluctance machines | Electricity | 27 | Expired |
| US5859513A | Starting and synchronizing system for line-start permanent magnet motor | Electricity | 23 | Expired |
| US4967464A | Method of making a switched reluctance motor having plural-stage form-wound coil winding | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7228616B2 | System and method for magnetization of permanent magnet rotors in electrical machines | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5780951A | Low-cost bobbin-wound stator construction for small, single-phase AC motors | Electricity | 20 | Expired |
| US4689546A | Internal armature current monitoring in large three-phase generator | Electricity | 18 | Expired |
| US6834407B2 | Method and apparatus for electronically commutated motor washer agitation controller | Emerging Cross-Sectional Technologies | 11 | Expired |
| US8928441B2 | Liquid cooled magnetic component with indirect cooling for high frequency and high power applications | Electricity | 10 | Active |
| US7145302B2 | Method and apparatus for driving a brushless direct current motor | Electricity | 8 | Expired |
| US11005313B2 | Skewed rotor designs for hybrid homopolar electrical machines | Electricity | 1 | Active |
| US7811068B2 | Methods and apparatus for transporting natural gas through a pipeline | Electricity | 1 | Active |
| US7709988B2 | Methods and apparatus for using an electrical machine to transport fluids through a pipeline | Electricity | 1 | Active |
| US6908349B2 | Combination AC motor drive and electrolyzer supply for marine vessel | Emerging Cross-Sectional Technologies | 1 | Expired |
| US8141234B2 | Optimal magnetization of non-magnetized permanent magnet segments in electrical machines | Emerging Cross-Sectional Technologies | 0 | Active |
| US10833541B2 | Tooth-wound stator assembly | Electricity | 0 | Active |
| US10833545B2 | Rotor for hybrid homopolar machine | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.