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| Number | Title | Issue Date |
| 7330055 | Circuit with high power density applicability A power control circuit is presented. The circuit includes a pair of parallel optocoupler/logic stages and a pair of parallel voltage-to-current driver stages electrically coupled to a halfbridge stage in the order described. An input signal is communicated to the o... | 02/12/2008 |
| 7274865 | General purpose 100% solid state drive for direct current rotary machines General purpose 100% solid state Direct Current drive for rotary DC machines with four quadrants operation. It is to say that allows the rotary DC machine to act like motor or generator in the two direction of possible rotation. In the first and third quadrant as mo... | 09/25/2007 |
| 7119520 | Energy storage flywheel test control system A system and method for removing energy from the rotating group in an energy storage flywheel system during flywheel system testing includes one or more sensors is operable to sense operational parameters of the energy storage flywheel and to supply a sensor signals... | 10/10/2006 |
| 7116073 | Methods and apparatus for controlling a motor/generator Methods and apparatus provide for: commutating windings of a polyphase machine such that electromagnetic fields of stator and rotor phases of the polyphase machine produce at least one of motoring and generating torque; providing a first rotor excitation voltage hav... | 10/03/2006 |
| 6949906 | Driving circuit and method for preventing voltage surges on supply lines while driving a DC motor A driving circuit of a DC motor includes a control circuit for providing a control signal, and a motor drive circuit commanded by the control circuit for providing respective command signals for the switches of an output power stage connected to the DC motor. The ou... | 09/27/2005 |
| 6731087 | Fan motor A fan motor includes a rotor coil and a stator coil. The stator coil has its starting coil or rotating coil provided with an auto-coupling tapped coil or a third coil to make up a secondary coil of the starting coil or the rotating coil. The tapped coil or the secon... | 05/04/2004 |
| 6617737 | Apparatus and method of powering light source An apparatus and method of powering a light source are provided. The apparatus includes a motor, a voltage stabilizing circuit, and a light source. The motor includes a field assembly and an armature assembly. The field assembly includes an intermediate t... | 09/09/2003 |
| 5703448 | Shunt-type speed control circuit having transient storage effect for a series or compound motor The series field winding of a compound or series motor includes a plurality of taps and, connected in parallel therewith, a transient storage element such as a capacitor, and a flywheel diode. The taps are controlled by switches in the form of transistors... | 12/30/1997 |
| 5576613 | DC motor-generator control circuit The present invention relates to a DC control circuit for a main motor-generator set, in which a main motor includes an auxiliary shunt field winding. The control circuit includes a current follower motor that is driven by the armature current of the main... | 11/19/1996 |
| 5504404 | Method and apparatus for controlling motor In a method and an apparatus for controlling a motor, one type or a plurality of types of weakening current are previously set, a first torque command current determined from a speed deviation between a speed command to the motor and the present speed of ... | 04/02/1996 |
| 5493186 | Sub-exiter control for the series winding of a series-type or compound DC motor or generator Sub-excitation of a series-type excitation magnetic field winding for a DC motor or generator is provided by an auxiliary power supply which, when the voltage in the main circuit is low, supplies voltage through a diode to the main series field winding in... | 02/20/1996 |
| 5453673 | DC motor with auxiliary exciting power supply for switching-on series (or compound) start of shunt normal operation according to the load A motor control circuit includes a series motor made up of a series field winding serially connected with an armature or a compound motor having both a series field winding and a shunt field winding. The series field winding is parallel connected to an au... | 09/26/1995 |
| 5410231 | Auxiliary power supply circuit for a series motor A compound series motor includes a series field winding, armature, and auxiliary power supply connected in parallel with the series winding. The drop in armature current through the series field winding may be reduced by connecting an auxiliary field wind... | 04/25/1995 |
| 5408166 | Dynamic current feedback magnetizing type series or compound DC motor-generator control circuit Dynamic current feedback for a main motor-generator is provided by an auxiliary generator which supplies power directly to the main excitation field winding of the main motor-generator, rather than to an auxiliary shunt field winding as in a prior design,... | 04/18/1995 |
| 3991349 | Droop adjustable control apparatus for direct current motor drives A field-controlled direct current motor is provided with a circuit responsive to armature current which is adjustable as to the amount of armature current representative signal, and the adjusted current representative signal is used to provide a selected ... | 11/09/1976 |
