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| Number | Title | Issue Date |
| 7355520 | Motor diagnostic indicator A motor receiving power from a power source. The motor comprises a motor housing, a stator at least partially disposed within the motor housing and supported by the motor housing, a rotor disposed to magnetically interact with the stator, and a visual indicator inte... | 04/08/2008 |
| 7012387 | Circuit that eliminates the sneak path for dual-speed DC motors A system for controlling a dual-speed motor includes a direct current (DC) power supply, a dual-speed DC motor, a first solid-state switch electrically coupled to the DC power supply and a low-speed input of the dual-speed DC motor, a second solid-state switch elect... | 03/14/2006 |
| 6979979 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 12/27/2005 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6693403 | Power failure tolerant motor drives for dual voltage systems A dual voltage motor drive is disclosed. In an exemplary embodiment, the motor includes a rotor assembly, rotatingly disposed within a stator assembly, and a plurality of motor phase windings configured to be energized in a determined sequence to cause a ... | 02/17/2004 |
| 5767653 | Variable speed AC induction motor controller A circuit for powering a two-phase AC induction motor. The circuit generates a first signal of the form Vdc+A sin(2πft-0°) and a second signal of the form Vdc+A sin(2πft-90°). The first signal is input to a first error amplifier along with a first sam... | 06/16/1998 |
| 5500582 | Multiphase load control system with switch connected split sources of phase voltage A multiphase load control system has switches in electrical series within each of several split sources of phase voltage. In each phase of one implementation, two contactor poles are in series between split sections of a secondary winding of a transformer... | 03/19/1996 |
| 4880391 | Apparatus for connecting multiple windings A terminal box assembly for use in a dynamoelectric machine adapted to be energized from an electrical power source and including a plurality of windings and each winding terminating in a corresponding lead wire. The lead wires are connectable to each oth... | 11/14/1989 |
| 4878006 | Multi-voltage motor and timer clock A motor having a capacitor in series with its coil permits the motor to operate at a higher voltage or range of voltages over its design voltage. A method determines the correct value of a capacitor to change the design voltage of a motor to a different o... | 10/31/1989 |
| 4228388 | Control circuit responsive to utility voltage level A control circuit for automatically rewiring electrically powered apparatus, such as a dual voltage multiple-phase motor, to adapt such apparatus to be powered by utility voltage at an available voltage level. The control circuit includes relays responsiv... | 10/14/1980 |
