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Class 318/379 - Locally closed armature circuit


Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter in which means are provided for immediately
No. of patents: 68
Last issue date: 04/10/2012


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NumberTitleIssue Date
8154232Method for operating a motor system, and a motor system
In order to enable in a motor system, in which a soft start of the motor has been implemented, the operation of the motor, wherein the power consumption is reduced, it is proposed to operate the driver circuit during a switch-on phase in order to carry out a soft st...
04/10/2012
7859205Motor drive apparatus and motor drive method
To reduce noise by limiting a current peak value to a predetermined value or less and by smoothing the waveforms of drive currents during the current limitation, switching control means (30) according to the present invention turns ON all of one-side drive tr...
12/28/2010
7781997Method and apparatus for braking a motor
The invention relates to a method and an arrangement for braking a synchronous motor (4) used with a frequency converter (2). The braking current of the motor (4) is controlled by connecting only the negative changeover contacts (10) of t...
08/24/2010
7436137Drive regenerative control system
Provided is a drive regenerative control system of a drivee with a motor superior in torque and weight balance and suitable for miniaturization as the drive source. In a drive regenerative control system having a drive source with an electric motor, a drivee, a cont...
10/14/2008
7358696Method and apparatus for PWM drive
During PWM control in which an actuator (9) is connected between the output terminals of a bridge circuit made up of switching elements (121, 122, 221, 222) and power is applied to the actuator (9) with signals G1U, G1L, G2U...
04/15/2008
7342369Differential ripple detection method and system
Method and system of monitoring operations of an electric motor. The method and system being applicable to any number of motors of the type used to drive moveable members, including but not limited to motors used to drive automatic vehicle windows and motors used to...
03/11/2008
7279858Drive regenerative control system
Provided is a drive regenerative control system of a drivee with a motor superior in torque and weight balance and suitable for miniaturization as the drive source. In a drive regenerative control system having a drive source with an electric motor, a drivee, a cont...
10/09/2007
7268508Direct current motor control circuit and wiper system using said circuit
The invention relates to a direct current motor control circuit. The invention also relates to the use thereof in a windscreen wiper system for vehicles. An MOS FET transistor with an anti-parallel diode (M3) is serially mounted on the braking system (M2
09/11/2007
7253577Independent safety processor for disabling the operation of high power devices
A drive for delivering a high-power signal to a load includes a power circuit and a drive circuit. The power circuit is operable to provide a high power signal to the load in response to a control signal. The control circuit is operable to generate the control signa...
08/07/2007
7234991Moving toy
A moving toy, e.g. toy car, comprises a body, wheels for moving the body on a surface, and an electric motor provided in the body for driving the wheels. A control circuit is connected to the motor for controlling the performance of the motor. Also included one or m...
06/26/2007
7199709Cart fleet management system
A hand-operated cart constructed for carrying luggage or packages includes a frame including a cargo area, and cart wheels connected to the frame and connected to a handrail arranged for manually displacing the cart. The cart also includes a distance sensor construc...
04/03/2007
7170245Motor power supply control apparatus
A motor power supply including a DC supply part having a pair of supply terminals; an inverter having a pair of connection terminals respectively connected to the supply terminals thereof to receive DC power therefrom and to supply AC power to a motor, a breaking re...
01/30/2007
7141947Braking chopper
A braking chopper for dissipating braking power away from the direct-current rails of an AC drive system, said braking chopper being an inverter unit (INU) physically similar to those also used as motor supply devices, consisting of upper- and lower-branch controlla...
11/28/2006
7116066Power 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
7071645Braking device for an electric motor, electrical apparatus provided with the braking device, and a method of braking
A braking device for an electric motor of a power tool has a short circuit switch for short circuiting an armature winding of the electric motor during a braking process, the short circuit switch for controlling its switch condition having a control input, a control...
07/04/2006
7054091Digital processor controlled method and circuit for retracting a head carriage assembly to a parked position in a mass data storage device, or the like
A retract circuit (40) for retracting a data transducer carriage assembly (17) of a mass data storage device (10) to a retracted position has a digital state machine (55) that is user programmable to operate in a selected retract mode. An...
05/30/2006
7038410Electric motor with dynamic damping
A method of dynamically damping an electric motor (12) that is controlled by an H-bridge driver (16) by interdigitating power pulses with braking pulses by switching from a power switch mode to a shorting circuit mode with switches (22 and 26...
05/02/2006
6933691Control system for a shifting mechanism with a DC motor
A control system controls a DC motor which operates a shifting mechanism. The control system includes switch circuit with a plurality of switches which connect terminals of the motor to a power supply. In order to limit the speed and torque, the control system opera...
08/23/2005
6909255Drive controller for a self-commutated converter
A drive controller for a self-commutated converter having two half-bridges with converter valves, includes two control circuits, with each control circuit associated with a corresponding half-bridge and operatively connected with the converter valves of that half-br...
06/21/2005
6903477Induction machine with motor and generator operation modes
An electric machine selectively operates as a generator mode or a motor mode. The electric machine includes a stator core, a multi-phase armature winding, a field coil, a moving core having a plurality of salient poles so as to move relative to the stator core to cr...
06/07/2005
6664755Intelligent electric motor
In an intelligent electric motor, the rotating speed and performance of a conventional electric motor is changed based on a means controlled by a computer, and the means is installed in the housing of the intelligent electric motor. For example, in the in...
12/16/2003
6573681Drive control for a three phase AC motor via an inverter using safe technology
The combining of two technically contrasting functions of "safe stopping" and "braking by armature short-circuiting" is served by using two means for pulse inhibition to block the respective current valves in the event of a fault by interrupting respectiv...
06/03/2003
6564110Position controlling apparatus capable of reducing the effect of disturbance
A discrete Kalman filter 12 and a disturbance estimating unit 13 are added to a feedback loop for feeding back a detected value of position from a position detector 6. The Kalman filter estimates position and velocity of an object to be controlled, therea...
05/13/2003
6373209Stepping motor with an electrical activation circuit and arrangement with a stepping motor
A stepping motor with an electrical activation circuit for electrical control of its exciter windings, is made as a driving motor and also as a braking motor with an adjustable braking action. The predefinable braking action is achieved passively without ...
04/16/2002
6373208System for voltage regulation of a voice coil motor
A method is disclosed for controlling the voltage applied to a voice coil motor coil during the retract operations of a mass storage device, comprising a combination of three different voltage regulator stages. This method includes providing a first circu...
04/16/2002
6356833Vehicle speed control system using wireless communications and method for controlling the same
Disclosed a vehicle speed control system using wireless communications, the system including a driving state detecting unit for detecting a driving state and outputting corresponding signals; a transmitter/receiver for outputting low-strength signals; an ...
03/12/2002
6239566Drive system for a permanently excited electric motor having at least one phase winding
A drive system for a permanently excited electric motor having at least one phase winding including a half-bridge arrangement for each phase winding of the motor, an intermediate circuit connecting each half-bridge arrangement to a motor supply voltage so...
05/29/2001
6175204Dynamic brake for power door
The invention is a dynamic brake for a power door which is moved by an electric motor having at least two terminals. The motor is energized by a pulse width modulated door drive amplifier connected to a first power line and a second power line. The door d...
01/16/2001
6118242Travel-limit circuit having a direct current motor for a lens
A travel-limit circuit having a DC motor for a lens by which the endurance of the motor can be improved while at the same reducing the rebound due to the inertia of the moving body at a travel extremity. The travel-limit circuit has a lens motor that driv...
09/12/2000
6118241Dynamic braking system for electric motors
A dynamic braking system for a brushless motor where energization of the motor winding is achieved through a transistor bridge circuit wherein half of the switching transistors are connected to a positive supply and the remaining switching transistors are...
09/12/2000
6013993Braking circuit for a universal motor
A braking circuit for a universal motor is proposed, in which, during braking, the at least one field winding is connected in series with the armature by means of a semi-conductor switch, preferably a field effect transistor or a thyristor. Since the semi...
01/11/2000
6008619Motor drive apparatus and motor driving method capable of simply reducing rotating speed in PWM mode
A drive current and a regenerative current are alternately applied to a motor during a PWM (pulse width modulation) time period. The regenerative current is produced by an electromagnetic induction of an armature and flows in the opposite direction as the...
12/28/1999
5982119Motor drive apparatus including braking means
A motor drive apparatus used in a motor for controlling a rotor therein to rotate in regular and reverse directions includes a rotating direction detecting circuit for detecting a first direction in which rotor is rotating. A comparator compares a command...
11/09/1999
5875281DC solid state series wound motor drive
Direct current (DC) solid state series wound motor drives for hoist and crane applications. A microprocessor controlled electronic system is employed to control the speed, direction, acceleration and deceleration of a direct current DC solid state series ...
02/23/1999
5782610Method of stopping scroll compressor that is driven by 3-phase DC motor
A method of stopping a scroll compressor that is driven by a 3-phase dc motor having 3-phase exciter windings is provided. The motor is energized by a 3-phase dc power that is produced from a dc power source through an electronic switching circuit. The sw...
07/21/1998
5760555Motor drive unit used for camera and accessory thereof
A motor drive unit is provided with a bridge circuit including series connected first and second MOS transistors, series connected third and fourth MOS transistors, a DC motor connected between a junction of the first and second MOS transistors and a junc...
06/02/1998
5703450Safety guard for pedestrian-operated machines having rotatable blades
A safety guard for a pedestrian-operated or riding machine having rotatable blades and incorporating a strip switch for disabling the motor of the machine upon sensing the presence of an operator's body part or other foreign object in contact with a side ...
12/30/1997
5631528Elimination of motor negative voltages during motor brake
A method for sensing motor commutation pulses during motor braking without creating negative voltages, which some junction isolated technologies substantially cannot tolerate. For instance, a commutation pulse sensing circuit containing junction isolated ...
05/20/1997
5543694Control circuit for feedback, motor-operated valve
A control circuit for limiting the current flow to a direct-current driven motor, to reduce current spikes at motor start up, including a voltage-regulated, current-passing device for passing current from a direct voltage source to the motor, the device h...
08/06/1996
5528115Inductive load drive circuit for eliminating back electromotive force caused by a load
An inductive load drive circuit for driving an inductive load, such as a motor, and for preventing charging of a power source by the back electromotive force of an inductive load. The inductive load drive circuit uses a battery as the power source for sup...
06/18/1996
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