http://www.freshpatents.com/Electricity--motive-power-systems-dtnewntc318.php USPTO Class 318 - Electricity: motive power systems en-us Tue, 18 Aug 2009 22:18:45 -0700 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/Drive-apparatus-and-method-for-its-operation-dt20090813ptan20090200968.php Tue, 18 Aug 2009 22:18:45 -0700 A drive apparatus with at least one synchronous motor, a converter and a mechanical energy buffer able to be fed from an energy supply network, which, for converting mechanical energy into electrical current, includes a first asynchronous machine, and a method of operation for such a drive apparatus are specified,... http://www.freshpatents.com/Regenerative-braking-apparatus-dt20090813ptan20090200969.php Tue, 18 Aug 2009 22:18:45 -0700 In a regenerative braking apparatus that is connected to a power supply apparatus that supplies electric power to a load, and consumes regenerative power regenerated from a load side together with other regenerative braking apparatuses that are connected to the power supply apparatus, an operation-level changing unit calculates, as occasion... http://www.freshpatents.com/Drive-system-of-synchronous-motor-dt20090813ptan20090200971.php Tue, 18 Aug 2009 22:18:45 -0700 A drive system of a permanent magnet motor is constituted of a mode switching trigger generator which monitors a state of a permanent magnet motor and issues a mode switching trigger, a conduction mode determining unit which receives the mode switching trigger and switches the mode of the permanent magnet... http://www.freshpatents.com/Brushless-dc-motor-and-image-pickup-apparatus-dt20090813ptan20090200972.php Tue, 18 Aug 2009 22:18:45 -0700 A brushless DC motor configured to drive a driven member includes a rotor having a magnet, a stator having a coil configured to provide a rotational force to the magnet, a position detector configured to output a first signal that is periodic, in accordance with a rotating position of the... http://www.freshpatents.com/Motor-drive-circuit-dt20090813ptan20090200973.php Tue, 18 Aug 2009 22:18:45 -0700 A motor-drive circuit comprising: a current-passage-control circuit to perform ON/OFF control of a drive transistor connected to a motor coil to pass current through the motor coil; an overcurrent-state-detection circuit to detect whether current passing through the drive transistor is in an overcurrent state where the current exceeds a predetermined... http://www.freshpatents.com/Chopper-control-system-for-rotary-machines-dt20090813ptan20090200970.php Tue, 18 Aug 2009 22:18:45 -0700 A control apparatus is to drive a power converter. The power converter has a power supply unit, a switching member electrically connected to the power supply unit, and a power accumulator electrically connected to the switching member. The control apparatus controls a rotary machine with a terminal electrically connected to... http://www.freshpatents.com/Sensorless-control-apparatus-of-synchronous-machine-dt20090813ptan20090200974.php Tue, 18 Aug 2009 22:18:45 -0700 A sensorless control apparatus of a rotary machine includes an inverter 05 to invert DC power and AC power from one to another, a permanent-magnet synchronous machine 07 whose rotor has magnetic saliency and which receives power from the inverter and is driven thereby, a PWM modulate means 04 to... http://www.freshpatents.com/Motor-drive-apparatus-and-method-for-electric-power-steering-system-dt20090813ptan20090200975.php Tue, 18 Aug 2009 22:18:45 -0700 In a motor drive apparatus for an EPS motor, which provides steering assist torque in an electric power steering system, a three-phase inverter applies three phase-voltages to the EPS motor, and a controller controls the three-phase inverter. The controller drives the EPS motor by implementing a two-phase modulation method and... http://www.freshpatents.com/Parking-brake-control-device-dt20090813ptan20090200976.php Tue, 18 Aug 2009 22:18:45 -0700 In a parking brake control device, the minimum value of a motor current is set as an idle current after a motor begins to be driven, specifically, in a period during which the idle current is being sampled. As a result, the idle current is set to a value which... http://www.freshpatents.com/Wall-saver-dt20090813ptan20090200977.php Tue, 18 Aug 2009 22:18:45 -0700 A system and associated method for preventing damage to an adjacent wall surface of an electrically operated bed that utilizes a normally closed/momentarily open switch assembly attached to the bed frame at a location such that when the bed fame is maneuvered toward an adjacent wall surface, a head of... http://www.freshpatents.com/Robot-controller-having-component-protecting-function-and-robot-control-method-dt20090813ptan20090200978.php Tue, 18 Aug 2009 22:18:45 -0700 A robot controller and a robot control method, by which each element constituting a robot is protected. An output of a rotary encoder attached to a servomotor is read, and the motor speed is obtained by calculating the difference between a current speed and another speed in a previous speed... http://www.freshpatents.com/Method-for-compensating-for-angular-transmission-error-of-an-actuator-dt20090813ptan20090200979.php Tue, 18 Aug 2009 22:18:45 -0700 The non-linear elastic deformation component included in the angular transmission error of an actuator provided with a wave gear drive is a component of the angular transmission error occurring due to elastic deformation of a flexible externally-toothed gear when the direction of rotation of the motor shaft changes. This component... http://www.freshpatents.com/System-and-method-for-controlling-four-quadrant-operation-of-a-switched-reluctance-motor-drive-through-a-single-controllable-switch-dt20090813ptan20090200980.php Tue, 18 Aug 2009 22:18:45 -0700 A single controllable switch (509) drive system for regulating the speed of a two-phase switched reluctance machine (TPSRM) (700) rotor may include a speed control feedback loop (970) component that uses an established speed control signal and a signal indicative of the rotor's speed to dynamically adjust a first parameter.... http://www.freshpatents.com/System-and-method-for-providing-constant-loading-in-ac-power-applications-dt20090813ptan20090200981.php Tue, 18 Aug 2009 22:18:45 -0700 A system and method for providing constant loading in AC power applications wherein at least one turn-on point (7) of at least one half cycle of a modulating sine wave (2) is determined; at least one turn-off point (8) of said at least one half cycle of a modulating sine...