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| Number | Title | Issue Date |
| 7339300 | Structural support member for stator retention and method of assembling an electromechanical transmission An electromechanical transmission includes a motor/generator having a stator and a rotor and including a structural support member that supports the stator in fixed relation thereto and the rotor in rotational relation thereto. By supporting both the stator and the ... | 03/04/2008 |
| 7281438 | Torque measuring apparatus A torque measuring apparatus is described that comprises a chassis, a reversible electrical motor having a motor housing and a rotatable output shaft projecting from one end of said motor housing, motor mounting means mounting said motor housing for rotation relativ... | 10/16/2007 |
| 7279855 | Electric drive device for vehicle and hybrid engine/motor-type four wheel drive device A vehicle electric drive system and a hybrid engine-motor type vehicle drive system realizing simplification and miniaturization of electric parts and, moreover, reduction in cost while maintaining performances can be provided. A part 1 of wheels is driven by... | 10/09/2007 |
| 7262533 | Energy transfer apparatus A motor and a generator both comprising a rotor and a stator, wherein said rotor and said stator of both said motor and said generator can rotate about a common axis, and wherein both said stators are coupled, and both said rotors are coupled, for one to induce rota... | 08/28/2007 |
| 7259948 | Power supply device for driving A power supply device for driving has a switching control circuit that switches a switching element for a power source, and an output voltage generation portion that generates a predetermined output voltage in accordance with the switching of the switching element f... | 08/21/2007 |
| 7208892 | Power management system for a floor care appliance A floor care appliance is provided with an improved power management system for controlling the total amount of current provided to at least a first and a second load device of an appliance. The power management system is comprised of a microprocessor, an alternatin... | 04/24/2007 |
| 7196488 | Motor driving apparatus A motor driving apparatus capable of drivingly controlling a plurality of inverter units with a single motor driving command from a motor control unit, and thereby control a large-capacity motor or the like. The motor control unit sends out a single motor driving co... | 03/27/2007 |
| 7156210 | Freight elevator landing door control A control system for a motorized freight elevator landing door in which all of the doors in a single line of a hoistway are controlled with one set of proximity sensors carried on the elevator car. The sensors signal a controller that operates electric motors for op... | 01/02/2007 |
| 7109605 | Electric load apparatus, method for processing abnormality, and computer readable recording medium recording program for causing computer to execute processing of abnormality in electric load apparatus Control apparatus (30) forcefully stops inverter (14) and inverter (31) when DC/DC converter (12) is anomalously stopped. Additionally, when one of inverters (14, 31) is anomalously stopped while DC/DC converter (12) is norm... | 09/19/2006 |
| 7090483 | Direct-driven extruder and process for operating the same An extruder which converts preferably granular plastic material into the melted state and which includes an extruder screw rotating within a cylinder and connected to a drive unit having a motor and at least one rotor so that the drive unit provides torque for rotar... | 08/15/2006 |
| 7088061 | Drive system for a group of machines A drive system powering a group of machines each fitted with a rectifying unit, wherein the inputs of the control devices of the machines' drive motors are interconnected by an electrical bus which implements a power exchange. The system enables swapping current fro... | 08/08/2006 |
| 7023171 | Integrated inverter for driving multiple electric machines An electric machine drive (50) has a plurality of inverters (50a, 50b) for controlling respective electric machines (57, 62), which may include a three-phase main traction machine (57) and two-phase accessory machines... | 04/04/2006 |
| 6967854 | Configurable power supply system for machine components The invention provides a power supply system and a method for providing a power supply for a machine having a plurality of components. The system comprises a power source and a set of two or more voltage converters connected in parallel and coupled to the power sour... | 11/22/2005 |
| 6903522 | Simple load-driving circuit capable of driving plural loads according to given priority order A load-driving circuit capable of driving a plurality of loads based on a priority order endowed therewith is provided. The load-driving circuit comprises a first load 3, a first driving switch 1 for driving the first load, a second load 4, a se... | 06/07/2005 |
| 6891342 | Drive apparatus for PWM control of two inductive loads with reduced generation of electrical noise A drive apparatus for driving two motors by PWM control of respective switching elements connected to the motors, whereby respective control signals are applied to the switching elements such that each commencement of a transition of one of the switching elements fr... | 05/10/2005 |
| 6832119 | Methods and systems for torque ripple compensation A method for compensating for torque ripple in pulse width modulated machines including providing damping for transient disturbances utilizing a fixed feedback controller and rejecting steady disturbances utilizing an adaptive controller. ... | 12/14/2004 |
| 5986416 | Apparatus and method for driving a mechanically-driven device in an electrical vehicle The apparatus is used for driving a mechanically-driven device in an electrical vehicle having at least one electrical traction motor. The apparatus comprises an auxiliary electrical motor mechanically connected to the device. The device is driven by the ... | 11/16/1999 |
| 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 |
| 5712540 | Control method and apparatus for controlling motors of air conditioner A control apparatus for controlling motors of an air conditioner comprises a converter circuit having switching circuitry for converting AC power to DC power and setting an input voltage of an input alternating current waveform to a sine wave of the same ... | 01/27/1998 |
| 5432419 | Recording medium library system A recording medium library system retaining up to a predetermined number of cartridge type recording media for recording/reproducing data on the recording medium is disclosed. The recording media are stored in a plurality of cells provided in a cell drum.... | 07/11/1995 |
| 5245263 | Anti-backlash drive systems for multi-degree freedom devices A new and innovative concept for the control of backlash in gear-coupled transmission mechanisms. The concept utilizes redundant unidirectional drives to assure positive coupling of gear meshes at all times. Based on this concept, a methodology for the en... | 09/14/1993 |
| 5019755 | Electric motor drive system An electric motor drive system having a first electric motor, a first drive shaft to which the first electric motor is coupled, a second electric motor having a higher power rating than the first, a second drive shaft to which the second electric motor is... | 05/28/1991 |
| 5012170 | Mechanical stabilization system with counter-rotating nested rotors The mechanical stabilization system for a support comprises a working rotor mounted on the support by means of bearings and fixed to a working member having at least one parameter associated with the rotation of the working member and which is variable as... | 04/30/1991 |
| 4897588 | Double motor feed control system A double motor feed control system for controlling a relative linear feed motion between two objects, such as a rail and a table of a linear motion rolling contact bearing assembly. The double motor feed control system includes a first motor, a threaded f... | 01/30/1990 |
| 4761588 | Dual-drive system for micro-manipulation of direct-drive robotic systems A dual-drive system compensates for the effects of drive system nonlinearities for micro-manipulation of direct-drive robotic systems. The dual-drive system uses two actuators to drive a single manipulator joint. The extra actuator compensates for undesir... | 08/02/1988 |
| 4689527 | Double driving device for machines This invention provides a double driving device which includes two motors, sharing a same common shaft or having their shafts linked together, and a control circuit. The two motors have different horse power and are used in machines, such as presses or sh... | 08/25/1987 |
| 4631463 | Linear controller for electrochemical device and method An apparatus for and method of generating and linearly controlling periodic bipolar drive signals to drive an electromechanical device, such as a DC motor. The apparatus comprises side-by-side coaxial primary and secondary cylindrical commutators electric... | 12/23/1986 |
| 4594652 | Digital audio differential drive system A motion control drive system for producing and controlling programmed and remote controlled machine operations by directing and controlling the performance of a rotating output shaft. The output shaft is then used to provide drive power and programmed co... | 06/10/1986 |
| 4489243 | Solar powered actuator with continuously variable auxiliary power control A solar powered system wherein a load such as a compressor (16) is driven by a main induction motor (14) powered by a solar array (10), and an auxiliary motor (18) shares the load with the solar powered motor in proportion to the amount of sunlight availa... | 12/18/1984 |
| 4288727 | Modular motor and control means and method An arrangement of electric motors which are coupled together both mechanically and electrically comprises series pass elements and current sensing devices in the power circuits of the respective motors, each current sensing device having an output voltage... | 09/08/1981 |
| 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 |
| 4126818 | Hybrid stepping motor unit A hybrid stepping motor unit includes a stepper-type primary motor and a secondary motor. The rotor shafts of the stepper-type primary motor and the secondary motor are connected to a common output shaft. The stepper-type primary motor is energized in res... | 11/21/1978 |
| 4103210 | Draw twisting machine A draw twisting machine is provided with a plurality of synchronous motors which drive respective draw rollers. The synchronous motors are supplied with electrical power from an A.C. generator having a variable frequency output. The A.C. generator is driv... | 07/25/1978 |
| 4092569 | Multiple armature permanent magnet motor/actuators This disclosure relates to electric motor/actuators and in particular to an electric motor/actuator including multiple non-magnetic armatures having commutated windings rotatable in a single air gap formed between opposing permanent magnets having their o... | 05/30/1978 |
| 4068741 | Elevator motor control system for A.C. induction motor An alternating current induction motor control system suitable to employ the motor as a hoisting motor for an elevator. The motor includes a high speed winding and a low speed winding, the high speed winding being used for acceleration and the low speed w... | 01/17/1978 |
| 3961232 | Hybrid step motor system A hybrid step motor system, in which a first step motor which steps A degrees per step and is provided with a load output shaft, has its stator driven by a second step motor which steps A/10° per step, so that the system has a resolution of A/10°, when ... | 06/01/1976 |
| 3940677 | Direct-current stepping motor drive system A motor drive system including a direct-current motor arranged in tandem with a stepping motor. The stepping motor is energized by conventional means. The direct-current motor is energized by a constant-current drive means, which is responsive to signals ... | 02/24/1976 |
