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| Number | Title | Issue Date |
| 7233465 | Ground fault detection system and method for inverter The present invention discloses a ground fault detection system and method for an inverter. The ground fault detection method for the inverter includes a reference value setting step for setting a reference value for estimating a ground fault current and a reference... | 06/19/2007 |
| 6977478 | Method, system and program product for controlling a single phase motor A controller is provided for transitioning a drive signal to a single phase motor between a square wave and pulse width modulation modes, wherein the drive signal is in square wave mode at low motor frequencies and in pulse width modulation mode during normal operat... | 12/20/2005 |
| 6636012 | Stator and rotor resistance identifier using high frequency injection A method and apparatus for generating stator and rotor resistance estimate, the method including the steps of providing high frequency injection voltage signals to a three phase motor, rotating three phase feedback current therefrom, converting the feedba... | 10/21/2003 |
| 5825111 | Single-phase induction motor 4/6 pole common winding connection with magnetic motive force symmetrically distributed A single phase alternating current four pole/six pole capacitor run induction motor is provided having a stator assembly including three coil groups, each of the coil groups having four coil sets. Each of the winding sets can change the direction of curre... | 10/20/1998 |
| 5382891 | Man/machine interface In a system including clock pulse data such as a network for sequencing music or multi-media data, a man/machine interface is provided which can be driven either by the operator or by a motor and transmission system. The man/machine interface contains enc... | 01/17/1995 |
