Abstract: A power system that supplies electrical power to at least one load is disclosed. The power system may include an electrical power generator, current sensors configured to provide current signals representative of currents output from the electrical power generator to the load, and voltage sensors configured to provide voltage signals representative of voltages output from the electrical power generator to the load. The power system may also include a controller configured to receive the current signals and the voltage signals, compare the current signals and the voltage signals to a predetermined map, determine whether a short circuit exists inside the electrical power generator based on the comparison, and send a command to turn off the electrical power generator when the short circuit exists inside the electrical power generator.

Abstract: The controller of the synchronous motor of the present invention includes: an allowable energy value acquisition unit (4) which acquires an allowable energy value until which a dynamic brake resistor, which is for short-circuiting the input terminal of the synchronous motor at a time of failure, can bear; an inertia estimation unit (6) which estimates inertia of a driven object based on a speed value and an electric current value; an allowable maximum speed calculation unit (5) which calculates an allowable maximum speed value of the synchronous motor from the inertia and the allowable energy value; and a speed control unit (2) which controls the amplifier for operating the synchronous motor at a predetermined commanded speed, in which the speed control unit (2) acquires the allowable maximum speed value from the allowable maximum speed calculation unit (5), and limits the commanded speed to the allowable maximum speed value or lower.

Abstract: A method solves a quadratic programming (QP) problem in real-time implementations of model predictive control for automation applications. The method can be implemented for fine-grained parallel solutions. Due to the extreme simplicity of the method, even serial implementations offer considerable speed advantages. The method solves the problem by formulating, over a predetermined time interval, an optimization problem with a quadratic cost function, and linear state and control constraints as a quadratic program for the application. Then, the quadratic program is solved by applying a parallel quadratic programming update law starting from a positive initial estimate to obtain control actions for the application.

Abstract: A driving device for a hatch in a vehicle, with a housing tube connected to a base part or to a movable structural component part, a protective tube connected to the movable structural component part or to the base part, a spindle drive having a threaded spindle and a spindle nut arranged on the threaded spindle by which the housing tube and the protective tube are movable axially relative to one another. A rotary drive drives the spindle drive in rotation includes at least one electric motor. The driving device has a safety circuit that causes a braking effect on the rotary drive when the rotary drive is deactivated and when extraneous forces are introduced into the driving device from the outside.

Abstract: In a motor control device that drives a plurality of motors with one DC power supply, detection of a short circuit fault occurring in the motors is realized with an inexpensive configuration. In order to drive the plurality of motors (105, 106), a current detection resistor (404, 405) is arranged between a connection point on positive terminal sides of a plurality of electric power converters (401, 402) connected in parallel to a DC power supply (403) and a positive terminal of the DC power supply, or also between a connection point on negative terminal sides of the plurality of electric power converters and a negative terminal (ground) of the DC power supply, to thereby detect the short circuit fault based on a voltage of the current detection resistor.

Abstract: An integrated optimization and control technique performs process control and optimization using stochastic optimization similar to that used in biological immune systems during on-line operation of a process, the technique collects and stores indications of process control states. During steady-state operation, the technique optimizes process operation by developing sets of process control inputs from stored process control states using an objective function that defines an optimality criterion. Moreover, after one or more disturbance inputs experiences a significant change, the technique responds by comparing the changed disturbance inputs to the disturbance inputs of at least some of the stored process control states to determine the stored process control states that are closest to the new process operating condition.

Abstract: A communications system for a position detector comprises a position detector for detecting the amount of movement of a table, an A/D converter connected to the position detector, a numerical control device connected to the A/D converter and receiving a position signal converted by the A/D converter, and an information processor connected to the A/D converter via a USB capable of bidirectional communication. The information processor includes a storage section for preserving data and a program, a computing section for computationally operating the program, and a display section for indicating the results of computational operation by the computing section, and the data.

Abstract: Methods and systems for detecting a motor shorting relay failure. Exemplary embodiments include methods and systems for determining a motor shorting relay failure in a motor, the motor having first phase winding in a first leg of the motor, a second phase winding in a second leg of the motor, and a third phase winding in a third leg of the motor, the method including applying a first voltage signal to the first leg, applying a second voltage signal to the second leg, applying a test voltage to a test circuit electrically coupled to the third leg, measuring a third voltage signal in the third leg at a first predetermined time in response to the application of the first and second voltage signals and determining a motor shorting relay in the motor, based on the amplitude of the third voltage signal.

Abstract: A conveyor unit (2) including a driving roller (5), a motor (30) for powering the driving roller (5), and a controller (10) adapted to adjust the motor (30) so as to control the driving roller (5), the motor (30) including a permanent magnet and an armature having a plurality of armature coils (32a–32c), and the controller (10) having an interrupter (15) adapted to repeat shunting and deshunting of at least one of the coils (32a–32c) and a rotation detector (17) adapted to detect an externally forced rotation of the motor (30) in response to an electromotive force induced in at least one of the coils (32a–32c), wherein in the case that the motor (30) is not driven, the controller (10) maintains operations of the interrupter (15) and outputs a presence signal by determining conveyance of an article (W) into an area powered by the motor (30) upon detection of the rotation of the motor (30) by means of the rotation detector (17).

Abstract: An electric motor of predetermined voltage rating is connected to an electric current supply source higher in voltage than the rated motor voltage in series with a voltage dropping resistor controlled by a thermal relay responsive to motor temperature. The series circuit is regulated by the relay to include or exclude the resistor thereby to maintain motor temperature at normal rated value.

Abstract: Apparatus for preventing damage to resistor grids in the propulsion controller circuit of a direct current motor, particularly of the type used in driving railway vehicles, in which a line breaker relay is de-energized whenever the propulsion controller fails to progress from the switch position to the full series position within 15-25 seconds. The line breaker relay remains de-energized for the duration of the power cycle of the propulsion controller and becomes operational automatically after the master control handle is returned to the off position.