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| Number | Title | Issue Date |
| 7755306 | Electric power control device, electric powered vehicle including the same, and method for controlling electric power of electric vehicle A load on a vehicle is connected to first and second neutral points in first and second motor generators through a relay circuit and power output lines. A control device controls inverters depending on a requested voltage of the load on a vehicle such that a potenti... | 07/13/2010 |
| 7737649 | Apparatus on a spinning room machine for monitoring an electric drive motor An apparatus on a spinning room machine, especially a spinning preparation machine, is arranged for monitoring an electric drive motor, which is connected to an electronic speed-setting and/or regulating device, a rotating operating element being connected to the dr... | 06/15/2010 |
| 7479746 | Power converter for an electric engine start system An electric engine starting system includes a permanent magnet motor that is used to start the engine and then to generate power for powering a load while the engine is running. A disclosed system includes a first phase controlled rectifier in series with a power co... | 01/20/2009 |
| 7308383 | System and method for providing electrical system monitoring and diagnosis A soft starter system for monitoring and diagnosing electrical power system characteristics includes a motor controller including solid state switches for controlling application of power to a motor. A control circuit controls operation of the solid state switches. ... | 12/11/2007 |
| 7265505 | Control apparatus for selectively driving plural stator windings of synchronous motor A control apparatus for a synchronous motor such as a switched reluctance motor, having a plurality of respectively separate stator windings, can operate the motor in either a normal mode or a low-torque mode by selectively supplying drive current to the stator wind... | 09/04/2007 |
| 7221115 | Method and apparatus for controlling multiplexed motors A control for stopping the rotation of the output shafts of a plurality of multiplexed motors configured in columns and rows with the first connector of each motor in a given column connected in parallel and with the second connector of each motor of a given row of ... | 05/22/2007 |
| 7199534 | Electric jack stroke limit detection method and device A method and device for detecting the stroke limit of an electric motor-driven jack while the jack is being used to adjust the attitude of a mobile platform. A controller is programmed to detect when an electric jack motor has driven a jack to a jack stroke limit by... | 04/03/2007 |
| 7190146 | Control system and method for an overhead bridge crane Included herein is a system and method for controlling a velocity vector of an overhead crane. A motor is attached to the crane and is positioned to move the overhead crane and has an output vector including a rotational direction and a rotational speed. A variable ... | 03/13/2007 |
| 7143681 | Firing direction system for a rocket launcher The invention relates to a firing direction system for adjusting a rocket launcher, and includes a drive motor (9) that is connected via a safety brake (2-8) with a drive shaft (1) for adjusting the rocket launcher, whereby a rotation of ... | 12/05/2006 |
| 7123462 | Load control device A load control device having a power control element connected in series to a series circuit of a load and an alternating power supply and a snubber circuit comprises suppressing means for suppressing current flowing through the snubber circuit when the load is not ... | 10/17/2006 |
| 7030509 | Apparatus and method for controlling movement of a movable member A control apparatus for a roof glass specifies the selection position of the selection switch when an output voltage from the selection switch is determined to be included in any of the allowable ranges predetermined respectively for the selection positions of the s... | 04/18/2006 |
| 7026771 | Motor control apparatus and electric appliance using the same A microprocessor of the motor control apparatus acquires a zero-cross detection signal from a zero-cross detection section and a load current from a current detection section at a prescribed sampling period. The processor obtains a load current instant value every s... | 04/11/2006 |
| 6952086 | Linear position sensing system and coil switching methods for closed-loop control of large linear induction motor systems A control system for a linear motor adapted to accurately supply a moving window of power to the stator coils. A plurality of individually switched stator coils run the length of a linear motor to move a rotor down the long axis of the stator. Accurate inductive-bas... | 10/04/2005 |
| 6903526 | Electronically commutated DC motor comprising a bridge circuit An electronically commutated DC motor comprises a stator comprising at least one stator winding (22, 24, 26), a rotor (28) electromagnetically interacting with the stator, a positive and a negative DC voltage line (76, 78) for supplying power to... | 06/07/2005 |
| 6838839 | Electric circuit of electric vehicle An electric vehicle includes a drive-motor driving device and a compressor-driving device for air-conditioning. Both of these driving devices share a smoothing capacitor and a radiator. The drive-motor driving devices, the compressor-driving device, and the smoothin... | 01/04/2005 |
| 6771036 | Position control method and position control system for drive feed equipment When driving a plurality of paralleled feed drive mechanisms individually by servo motors (105, 106), torque of the servo motors (105, 106) is detected, and in dependence on a difference therebetween, a position command of servo motor (106) at a... | 08/03/2004 |
| 6577095 | Brushless alternating current electric servo motor drive AC servo motor drives which allow several AC drives to be connected in parallel and allow for the connection and reconnection of AC servo motors to be accomplished primarily through a central processing unit (CPU). Thus, multiple AC servo motor drives may... | 06/10/2003 |
| 6342768 | Displacement apparatus arranged for guiding a carrying device along at least two rails A displacement apparatus comprising a first rail and a second rail, extending substantially parallel thereto, while on the first rail a first driving gear with a first motor is provided and on the second rail a second driving gear with a second motor is p... | 01/29/2002 |
| 6259222 | Device and method for regulating maximum loading on an electric motor in an aggregate feed replenishing system A device for controlling load on a first motor whose load is affected by a second motor, comprises a controller having a first input for being connected to a horsepower transducer connected to the first motor being monitored and an output for being connec... | 07/10/2001 |
| 5942862 | Power output apparatus and method of controlling the same A power output apparatus (20) of the present invention includes a clutch motor (30), an assist motor (40), an engine (50), and a controller (80) for controlling the clutch motor (30) and the assist motor (40). Auxiliary machinery driven by the rotation of... | 08/24/1999 |
| 5939846 | AC motorized wheel control system Torque is distributed by calculating first and second torque commands using a requested torque and a ratio of speeds of first and second wheels and limiting them in accordance with respective torque command approved ranges and approved change rates; conve... | 08/17/1999 |
| 5874813 | Control method, especially for load balancing of a plurality of electromotor drives A load-balancing method for a multiplicity of controlled drives, especially individual electric motors of the rolls of a leveling machine for metal strip, in which all of the motors have speed and current-control circuits and are interconnected by a super... | 02/23/1999 |
| 5625262 | System for equalizing the load of a plurality of motors A system having two or more A.C. motors driving the same load. The stator windings and rotors of both motors each conduct current having a vector representative of a magnitude and angular position of the current in the respective rotor and stator winding.... | 04/29/1997 |
| 5384520 | Balanced drive motors with cross-coupled excitation Balanced-drive multiple motors each including an armature rotatably actuated by a field winding. Cross-coupled series excitation of the field windings is accomplished by electrically connecting the field winding of each motor in series with the armature o... | 01/24/1995 |
| 5204591 | Device for controlling at least one electronic servomotor with high power from a low-voltage network, in particular for motorizing a turret on a tank Device for controlling at least one electric servomotor with high power from a low-voltage network, in particular for motorizing a turret on a tank, characterized in that it comprises, in combination: a voltage booster converter (C), a reversible chopping ampl... | 04/20/1993 |
| 5004966 | Computer activated reward dispensing machine A machine is designed to be used as an educational tool. The machine is connected to a 120 volt alternating current source of electrical power and to a personal computer. The computer is programmed to put questions on a monitor and to send a signal to the... | 04/02/1991 |
| 4987351 | Load-based control of an AC motor An AC motor control based on an iterative computation of the motor load and method of accurately determining motor load. At the initiation of motor operation, the load term (%LOAD) is initialized to zero, and the motor is energized in accordance with a pr... | 01/22/1991 |
| 4983892 | Mechanism for controlling electrically driven antenna A control apparatus is placed in a drive circuit of a motor of an electrically driven antenna. The drive circuit is provided in parallel with a transmitter-receiver circuit of a transmitter-receiver, and an operation unit is provided so that control instr... | 01/08/1991 |
| 4885698 | Overload prevention apparatus for jacking system of offshore structures An overload prevention apparatus for a jacking system of a rack and pinion type for use in offshore structures is disclosed. Each of the pinions is provided with a torque meter and tachometer for detecting a relative position between the pinion and the ra... | 12/05/1989 |
| 4822185 | Driving method of a printing apparatus employing a non-stabilized power source A driving method for a printing apparatus having a non-stabilized power source compensates for power supply fluctuations by selectively driving an additional load, such as another electric actuator, in a non-functional mode to thereby stabilize the curren... | 04/18/1989 |
| 4788476 | Machine for lapping two curved-tooth bevel gears A lapping machine for correcting the asymmetrical hardening distortions which occur during the hardening of gear wheels, especially bevel gears, is disclosed. This machine is particularly advantageous in connection with large bevel gear transmissions or d... | 11/29/1988 |
| 4683786 | Numerically controlled lathe A numerically controlled turning machine comprises a main spindle (Hs) and at least two cross slides (K1,K2) each provided with a saddle (W1 and W2, respectively). Another saddle (W3) is pr... | 08/04/1987 |
| 4604557 | Vending machine power switching apparatus An improved vending machine power switching apparatus in which a single power switching circuit is associated with a plurality of load selecting relay switches and a switching control circuit, in which the control circuit controls the order of switching o... | 08/05/1986 |
| 4559482 | Automotive rim roll forming drive system An electric drive system for automotive wheel rim forming equipment having inner and outer forming rolls mounted on driven spindles. The drive system includes separate drives for each forming roll and a control system for maintaining a predetermined speed... | 12/17/1985 |
| 4556826 | Inching supply torque control In a drive system for a grinding mill the load torque plus frictional torque may increase considerably as a loaded mill is inched from its rest position and will suddenly decrease when the load tumbles or cascades. The applied torque or driving torque mus... | 12/03/1985 |
| 4511826 | Control apparatus for metal saw cutter A metal saw cutter has a first motor for rotating a workpiece to be cut and a second motor for rotating a metal saw independently of the first motor. A control apparatus of the metal saw cutter has a detector for detecting variations in an electrical output de... | 04/16/1985 |
| 4496883 | Electric inching impulse control There is provided an electrical inching control for inching a drive system comprising a grinding mill driven by one or more three phase synchronous motors. The electric inching control includes an inching power bus and contactors or the solid state equiva... | 01/29/1985 |
| 4482848 | Controllable power source A controllable power source is suitable for driving one or more electric motors from a low voltage battery. A converter steps up the d.c. voltage to a higher level at which the motors are designed to operate and a power regulator placed between the conver... | 11/13/1984 |
| 4357561 | Automotive rim roll forming drive system An electric drive system for automotive wheel rim forming equipment having inner and outer forming rolls mounted on driven spindles. The drive system includes separate drives for each forming roll and a control system for maintaining a predetermined speed... | 11/02/1982 |
| 4320327 | Automotive rim roll forming drive system An electric drive system for automotive wheel rim forming equipment having inner and outer forming rolls mounted on driven spindles. The drive system includes separate drives for each forming roll and a control system for maintaining a predetermined speed... | 03/16/1982 |
