Class 318/60 - And braking

Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter in which means are also provided for braking
No. of patents: 36
Last issue date: 12/26/2006

Number	Title	Issue Date
7154244	Steering apparatus Steering apparatus includes at least one motor for generating a steering assisting force in a direction to steer a steerable wheel, two drive circuits having respective switching elements for PWM-controlling the motor, and a controller for differentiating, between t...	12/26/2006
7124691	Method for monitoring and controlling locomotives The present invention is directed to a locomotive comprising energy storage units, such as batteries, a prime energy source, such as a diesel engine, and an energy conversion device, such as a generator. The locomotive comprises one or more of the following features...	10/24/2006
7098616	Control device for a motor unit of a food processor A control device includes a control module controlling a polarity switching unit connected electrically to a motor unit of a food processor to provide a first current path for an input power signal through the motor unit when the control module is operated in a proc...	08/29/2006
7053568	Battery-powered vehicle with AC driven traction and pump motors for mining applications A battery-powered vehicle for transporting a mined payload or supplies over the roadways existing in or around an underground mine, includes variable voltage, variable frequency drivers that convert DC voltage from a battery into an AC voltage for driving AC inducti...	05/30/2006
7034476	System and method for providing automatic power control and torque boost Certain exemplary embodiments can provide for automatic power control and/or torque boost for retarding a machine. The automatic power control and/or torque boost can provide a control margin under retard. Certain exemplary embodiments comprise a method comprising: ...	04/25/2006
7023152	Driving control device for actuator A driving control device for an actuator comprises a driving device to drive an actuator having an electric motor (30) and a driving control device (50) to control the rotation of the electric motor (30) by controlling the driving device. The dr...	04/04/2006
6954045	Driving force control system for hybrid vehicle There are provided as drive sources an engine 2, a front motor 3 provided on a front wheels 8 side of the vehicle and a rear motor 4 provided on a rear wheels 9 side of the vehicle, and in executing a regeneration of deceleration e...	10/11/2005
6601513	Motor control method and apparatus, time recorder having same and impact type printing apparatus A motor control method and apparatus for stopping an object moved by a motor accurately at a predefined target position, shortening the time period required in stop control, in which the motor is driven at a first (high) speed up to a distance from the ta...	08/05/2003
6307346	Induction motor load limiting for power steering applications A power steering system and induction motor load compensation algorithm or processing method for use in a vehicle. The power steering system comprises a power supply, a power steering motor, a steering subsystem, and a power steering controller coupled to...	10/23/2001
6230831	Wheel chair with auxiliary power A power-assisted wheelchair (1) having an electric motor (32), a potentiometer (27) as means for detecting human power applied to wheels (2), and a controller (31) as means for controlling the electric motor (32) according to the detected human power so a...	05/15/2001
5796221	Overload detector for servo driven machines A controller for detecting abnormal operating conditions of a continuous motion machine such as a packaging machine. The acceleration and velocity of motors for the various axes of the machine are examined by the controller and rapid deceleration or a mor...	08/18/1998
5773940	Power drive device A power drive device is disclosed that includes a motor, a control device coupled to the motor, and a rotatable reference axle member rotatably interlocked with the rotation of the motor. A first detection member detects a first phase and a third phase of...	06/30/1998
5517092	Rotation speed sensing in a drive arrangement for a motor vehicle In a drive arrangement of a motor vehicle in which the wheels of the motor vehicle are driven by separate electric motors and the electric motors are powered via a d.c. voltage intermediate circuit by a generator arrangement driven by an internal combusti...	05/14/1996
5428281	Semiconductor integrated circuit device A semiconductor integrated circuit device incorporates a voltage step-up (boost) circuit which produces a stepped-up (boosted) voltage higher than the power voltage based on a periodic pulse signal generated internally or supplied from the outside. The st...	06/27/1995
5345154	Electric continuously variable transmission and controls for operation of a heat engine in a closed-loop power-control mode A heat engine operates an alternator that supplies electrical power to an electric continuously variable transmission for driving at least one ac motor through a differential to multiple wheels or to multiple independent ac wheel motors in an automobile, ...	09/06/1994
5196769	Motor control device The present invention relates to a motor control device using an inverter or inverters, in particular, it relates to a motor control device suitable for the prevention of inertial rotation of a motor or motors or for the maintenance of synchronized operat...	03/23/1993
5162707	Induction motor propulsion system for powering and steering vehicles A propulsion system for using a pair of electric induction motors to power a pair of vehicle drive wheels. The motors are driven by pulses of electric current from a common dc bus. The inductance of stator windings cause electric current to power the moto...	11/10/1992
4916367	Method of and apparatus for preventing scanning line deviation in a process scanner of a separated drum type An original drum and a recording drum are driven independently by individual synchronous motors. Encoders output respective rotation timing pulses (Pa, Pb) at every rotation of the recording drum and the original drum. If an interval...	04/10/1990
4767970	Dynamic brake control for a tape drive system In a tape drive system, a dynamic brake control circuit provides dynamic braking for slowing and stopping an associated tape reel and motor system in the event of a power failure. Upon sensing a power failure, the electrical energy stored in a capacitor s...	08/30/1988
4707643	Rotary speed ratio control for a multiple rotary drive system for a textile-working machine In the drive for a textile working machine, for the synchronized yet independently operable drive of at least two shafts, brake-clutch units associated with each shaft are provided, which are driven by a common electric motor. To achieve a regulation and ...	11/17/1987
4495449	Electric propulsion system for traction vehicles with automatic retard speed regulation Two separately-excited d-c electric motors are used to drive the wheels of a traction vehicle. The magnitude of motor field current varies as a function of the value of a variable control signal, which value is representative of any deviation of the field...	01/22/1985
4489256	Primary and secondary dynamic braking system A dynamic braking system is provided for electrically driven wheelchairs to slow the wheelchairs to a stop without needing to use a mechanical brake. A primary switch arrangement is provided for connecting resistors across the right and left wheelchair mo...	12/18/1984
4481449	Power fail servo system A power fail circuit provides protection for tape such as used in the tape transport apparatus of a video recorder in the event of a failure of the external power supply. The tape transport apparatus includes as a feature the provision of an electrical er...	11/06/1984
4458185	Propulsion control apparatus for passenger vehicles A cam controller for determining the operation of an electric motor is coupled with a stepping motor to provide predetermined positional movements of the cam controller in response to a desired electric motor operation control signal and in accordance wit...	07/03/1984
4450388	Dynamic braking of direct current motors A dynamic braking system for a D.C. traction motor which is driven from an asymmetric bridge rectifier having freewheel diodes to permit circulation of motor generated current. The system employs field reversal to ensure a generated (braking) current dire...	05/22/1984
4449077	Chopper control equipment for electric railcars When a plurality of shunt motors connected in parallel are used for driving an electric railcar, the differences in the characteristics of the motors introduced during the manufacturing thereof causes the armature currents to vary greatly even when they a...	05/15/1984
4443742	Phase locked loop motor control system A phase locked loop control system, in particular for use for synchronizing the operation of a carriage drive motor and a main drive motor in a photocopier, uses a digital frequency- and phase-comparator and relies on the output pulses, used to power the ...	04/17/1984
4415049	Electrically powered vehicle control An electric control is disclosed for an electrically powered vehicle having independently controlled left and right drive motors and associated drive wheels to propel and steer the vehicle. The electrical control includes left and right closed loop contro...	11/15/1983
4390821	Device for changing the relative angular positions of operating shafts of a group electric drive An electric group drive having synchronous motors which are fed from a static operating converter has a second converter for use in varying the relative angle position of the motors. Provision is made for using the second converter as a start-up and braki...	06/28/1983
4355267	Propulsion motor control apparatus A solid-state motor control apparatus operative with a plurality of series motors to determine the selection of a power mode of operation and a brake mode of operation, and including a plurality of current sensors to establish the current flow in the moto...	10/19/1982
4345721	Apparatus for the variable speed control of cams in textile machines An apparatus is disclosed for the variable speed control of cams in a textile machine to provide for high speed winding of thread on spools which are controlled by the cams. A motor drives each cam. The speed of each motor is varied according to a predete...	08/24/1982
4323828	Apparatus for use with a motor drive An apparatus is provided for use with a motor drive for cancelling the electromagnetic reaction energies developed by a pair of drive motors upon rapid starting or sudden stopping, the latter occurring upon the application of dynamic braking to said motor...	04/06/1982
4296361	Control systems A motor control system for a pair of motors which drive respective wheels of a vehicle which is steered by controlling the relative speed of the motors includes switch means, and a pair of resistors which are connected in a series circuit including the mo...	10/20/1981
4079296	Variable speed AC motor control circuit A microfilm reader has a film transport mechanism driven by separate forward and reverse motors. During operation, the driven one of the motors receives full AC power for driving it at high speed. During low speed operation, the driven motor receives part...	03/14/1978
4072879	Turn-off interlock for tape and film machines An interlock circuit is provided for tape and film machines which, when the high speed forward or reverse motors are in operation, prevents the main power from being turned off even though the operator might actuate the power switch. Instead of the power ...	02/07/1978
4066933	Static switching device for two direct current machines Static switching device for two machines making it possible to effect antkid control during drive operation and the controlling of the braking torque during brake operation. It comprises two circuits in parallel on the direct current source, a first circ...	01/03/1978

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Class 318/60 - And braking