Class 318/107 - A.C. and D.C.

Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter in which the sources comprise one or more
No. of patents: 28
Last issue date: 12/13/2011

Number	Title	Issue Date
8076873	Hybrid outdoor power equipment Hybrid power equipment comprising a user-selectable power selection switch for switching between DC or AC power, a boost and conserve feature for increasing speed of the working elements as necessary, and a motor or a plurality of motors for moving working elements....	12/13/2011
7345437	Rechargeable vacuum with reduced AC voltage A motor is disclosed that operates on either AC outlet power or DC battery power with decreased power drop when switching between AC and DC power. The AC power to the motor may be stepped down by using a clipper circuit, while the DC power supplied to the motor may ...	03/18/2008
7259530	Power output apparatus, motor driving method and computer-readable recording medium having program recorded thereon for allowing computer to execute motor drive control A control CPU generates, in response to a signal STON from a start key, a signal SE at H level and outputs the generated signal to a relay to render system relays ON. Accordingly, a DC power supply is connected between respective neutral points of three-phase coils....	08/21/2007
7242105	Electric engine start with two motors and single motor drive An electrical starter-generator system includes a first starter-generator and a second starter-generator. A single drive controls both the first starter-generator and the second starter-generator such that their electrical current and power inputs are minimized and ...	07/10/2007
7116066	Power supply circuit of a high speed electric motor A power control system (12) for an electric motor having at least one magnetic bearing includes a DC/DC converter (18) supplied from a DC link bus (179) connected to a main power supply (14), the bus (17) supplying power for the el...	10/03/2006
7102304	Control device for a reversible rotating electrical machine The invention relates to a control device for a reversible, multi-phased rotating electrical machine which can operate in alternator or motor mode. The inventive device comprises a main battery (4), an electric network (5) and a unit (3) for con...	09/05/2006
6920718	Independent backup power supply for a security barrier A system is disclosed for providing a backup power supply for a security gate system. In a preferred embodiment it includes a primary power supply, an AC motor and an auxiliary DC motor that share the same accessory devices including controller, movement mechanism, ...	07/26/2005
6812657	Motor control for two motors A load in an electrical apparatus is driven by two motors M1, M2. Switching means (R1, R2) switches the motors M1, M2 between: a series configuration, in which the motors M1, M2 are connected in series across a...	11/02/2004
6404151	Electric vehicle drive An electric vehicle drive has an electric machine which can be alternatively driven as a motor or as a generator and has a d.c. connection to which a supply voltage can be applied, from a first energy source and/or a second energy source. The first energy...	06/11/2002
5886889	Device and method for direct current power supply to a traction system by means of converters from different alternating current or direct current voltages A device and a method are disclosed for direct current voltage power supply to a traction system by means of converters from different alternating current or direct current voltages available on a power supply line. The power supply device is supplied wit...	03/23/1999
5880537	Uninterruptable power supply An uninterruptable power supply, operating normally under power supplied by a utility, has a main motor, a smaller induction motor, and a mechanical load such as a generator coaxially coupled together. A battery is connected to the smaller induction motor...	03/09/1999
5852333	Electric actuator return-to-normal using capacitor energy storage with regulated output An electric actuator return-to-normal failsafe system that utilizes a bank of storage capacitors to store electrical energy for returning an electrical actuator to a safe position in the event of a power failure. The failsafe system includes a regulator c...	12/22/1998
5818194	Direct replacement variable speed blower motor A blower motor unit having a variable speed motor and that is suitable for direct, drop-in replacement in a residential HVAC (heating, ventilation, and air conditioning) system that employs a PSC motor. The blower motor unit is provided with a neutral inp...	10/06/1998
5789894	Solid state motor speed control A solid state motor speed control is described that is capable of controlling a motor so that it operates quietly, eliminating annoying buzzing noises that would otherwise be generated by the motor's windings. The invention provides for motor speed contro...	08/04/1998
5757148	Method of and apparatus for stopping a motor having magnetic bearings A motor having windings normally energizable by electric power from an AC power supply is stopped in case of an emergency such as a failure of the AC power supply. The motor has a rotor rotatably supported by magnetic bearings out of contact therewith. Th...	05/26/1998
5684376	Solid state motor speed control A solid state motor speed control is described that is capable of controlling a motor so that it operates quietly, eliminating annoying buzzing noises that would otherwise be generated by the motor's windings. The invention provides for motor speed contro...	11/04/1997
5629592	Electric vehicle control device in both an alternating current section and a direct current section While an electric vehicle is traveling in a DC section, a ripple component detecting unit detects a ripple component appearing on a filter capacitor voltage and adds the ripple component onto an inverter frequency reference in such manner as to cancel an ...	05/13/1997
5629591	High-availability multicurrent power supply system for the traction unit of a railway locomotive A system for powering a multicurrent locomotive having 2N motors where N is greater than or equal to 2, the system comprising 2N pairs of voltage converters respectively associated with the 2N motors, each motor Mi being powered by means of an ...	05/13/1997
5367600	Motor control for a treadmill having improved power supply and improved speed regulation under intermittent loading A motor control for a treadmill has an improved, inexpensive, and simple set of power supplies, derived from the bus voltages of the DC busses with simple voltage dividers, to supply operational amplifiers connected to the positive DC voltage bus with a d...	11/22/1994
5304900	Spinning frame A flyer frame has a first AC motor for obtaining a general rotational movement of various parts of the frame and a second AC motor for obtaining only a variable component of the rotational movement of the bobbin. An inverter is provided for operating the ...	04/19/1994
5148090	Variable reluctance type AC servo motor This invention determines the configurations of a rotor (10) and a stator (12) and conductance periods and conductance phases of the conductance currents to obtain a smooth rotation of a variable reluctance motor as an AC servo motor. When the number of p...	09/15/1992
5099186	Integrated motor drive and recharge system A drive and recharge system is disclosed that includes a bidirectional dc power source, two voltage-fed inverters, two induction motors, and a control unit. In the drive mode, power is bidirectionally connected between the dc power source and the motors. ...	03/24/1992
4649287	Bidirectional control system for energy flow in solar powered flywheel An energy storage system for a spacecraft is provided which employs a solar powered flywheel arrangement including a motor-generator which, in different operating modes, drives the flywheel and is driven thereby. A control circuit, including a threshold c...	03/10/1987
4423364	Electric motor damper drive with backup power pack An electric damper motor drive with a backup power pack is disclosed comprising a reversible electric motor operable in first and second opposite directions in response to first and second distinct forms of electrical energization, respectively. A primary...	12/27/1983
4341982	Simultaneous independent control system for electric motors A system for simultaneously and independently controlling a plurality of electric motors from a number of dispersed stations. The system operates by transmission of duty cycle modulated selected frequencies superimposed on a DC track voltage on a common p...	07/27/1982
4131827	Power transfer apparatus A power transfer apparatus transfers electrical energy from a DC voltage source that may vary in potential, e.g., a solar cell array, to a load such as a DC motor connected to drive an AC motor-generator. A power transfer device couples the solar cells to...	12/26/1978
3988655	Apparatus to control the direction of movement of a mechanism Apparatus to control the direction of movement of a mechanism over a surface. The surface is provided with a plurality of substantially parallel strips of conductive material alternately connected to opposite terminals of a source of current supply. The m...	10/26/1976

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Class 318/107 - A.C. and D.C.