Abstract: A signal processing device of a scanning-type distance measurement device includes: a distance calculation unit for, on the basis of a predetermined correlation relationship between measured light and reflection light, calculating, for each predetermined scan angle, the distance from the scanning-type distance measurement device to an object; a to-be-monitored object determination unit for performing a to-be-monitored object determination process, in which, when the distance calculation unit calculates a distance within a to-be-monitored region for N number of scans (N is an integer equal to or greater than 2) consecutively in a specific scan angle direction, it is determined that there is an object to be monitored in the specific scan angle direction; and a signal output unit which, when it is determined by the to-be-monitored object determination unit that there is an object to be monitored, outputs a to-be-monitored object detection signal.

Abstract: A power conversion apparatus includes a first DC/DC converter which includes a first transformer, a first primary circuit provided at a primary side of the first transformer, and a first secondary circuit provided at a secondary side of the first transformer. The first secondary circuit includes sets of a switching element and a free-wheel diode, which is connected between an input terminal and an output terminal of the switching element, to perform synchronous rectification operation and diode rectification operation. The apparatus includes a second DC/DC converter which includes a second transformer, a second primary circuit provided at a primary side of the second transformer, and a second secondary circuit provided at a secondary side of the second transformer. The second secondary circuit includes a plurality of rectifier diodes, which are arranged in parallel with each other, to perform the diode rectification operation constantly.

Abstract: An electric power converter is equipped with a master converter and a slave converter that are connected in parallel with each other, and to a load. The master converter operates having priority over the slave converter. The slave converter includes a voltage sensor for detecting an output voltage of the electric power converter and a control unit for controlling an output of the slave converter based on a target command value. The control unit selects a current command value Ic2 received from the master converter as a target command value when a variation ?V per predetermined time of a detected output voltage Vo2 is lower than a variation ?Vth1. The control unit selects a voltage command value Vc2a calculated so as to suppress the output voltage Vo2 from changing as the target command value when the variation ?V exceeds the variation ?Vth1.

Abstract: A power conversion apparatus is provided which includes a first DC/DC converter and a second DC/DC converter which are connected to each other in parallel, and a controller which changes a state of the second DC/DC converter between operation and stop, based on an input current or an output current of the power conversion apparatus, and at least one current threshold determined based on a first characteristic curve showing a relation between current and conversion efficiency in a state where the second DC/DC converter is stopped while the first DC/DC converter is operated and a second characteristic curve showing a relation between current and conversion efficiency in a state where the first DC/DC converter and the second DC/DC converter are operated.

Abstract: An electric power converter is equipped with a master converter and a slave converter that are connected in parallel with each other, and to a load. The master converter operates having priority over the slave converter. The slave converter includes a voltage sensor for detecting an output voltage of the electric power converter and a control unit for controlling an output of the slave converter based on a target command value. The control unit selects a current command value Ic2 received from the master converter as a target command value when a variation ?V per predetermined time of a detected output voltage Vo2 is lower than a variation ?Vth1. The control unit selects a voltage command value Vc2a calculated so as to suppress the output voltage Vo2 from changing as the target command value when the variation ?V exceeds the variation ?Vth1.

Abstract: A power conversion apparatus includes a first DC/DC converter which includes a first transformer, a first primary circuit provided at a primary side of the first transformer, and a first secondary circuit provided at a secondary side of the first transformer. The first secondary circuit includes sets of a switching element and a free-wheel diode, which is connected between an input terminal and an output terminal of the switching element, to perform synchronous rectification operation and diode rectification operation. The apparatus includes a second DC/DC converter which includes a second transformer, a second primary circuit provided at a primary side of the second transformer, and a second secondary circuit provided at a secondary side of the second transformer. The second secondary circuit includes a plurality of rectifier diodes, which are arranged in parallel with each other, to perform the diode rectification operation constantly.

Abstract: A power conversion apparatus is provided which includes a first DC/DC converter and a second DC/DC converter which are connected to each other in parallel, and a controller which changes a state of the second DC/DC converter between operation and stop, based on an input current or an output current of the power conversion apparatus, and at least one current threshold determined based on a first characteristic curve showing a relation between current and conversion efficiency in a state where the second DC/DC converter is stopped while the first DC/DC converter is operated and a second characteristic curve showing a relation between current and conversion efficiency in a state where the first DC/DC converter and the second DC/DC converter are operated.

Abstract: In a power supply unit, a printed circuit board is provided on which two or more different-shape components are mounted. Such components include semiconductor devices. The printed circuit board has a designated mounting surface of the board. The housing is also provided, which houses the printed circuit board and comprises a cooling member for cooling a first space formed between the mounting surface and an opposed surface in the housing. The opposed surface is opposed to the mounting surface. The cooling member is arranged at part of the opposed surface, the part of the opposed surface projects toward the semiconductor devices, and the opposed surface is opposed to the two or more types of different-shape components.

Abstract: A signal processing device of a scanning-type distance measurement device includes: a distance calculation unit for, on the basis of a predetermined correlation relationship between measured light and reflection light, calculating, for each predetermined scan angle, the distance from the scanning-type distance measurement device to an object; a to-be-monitored object determination unit for performing a to-be-monitored object determination process, in which, when the distance calculation unit calculates a distance within a to-be-monitored region for N number of scans (N is an integer equal to or greater than 2) consecutively in a specific scan angle direction, it is determined that there is an object to be monitored in the specific scan angle direction; and a signal output unit which, when it is determined by the to-be-monitored object determination unit that there is an object to be monitored, outputs a to-be-monitored object detection signal.

Abstract: In a power supply unit, a printed circuit board is provided on which two or more different-shape components are mounted. Such components include semiconductor devices. The printed circuit board has a designated mounting surface of the board. The housing is also provided, which houses the printed circuit board and comprises a cooling member for cooling a first space formed between the mounting surface and an opposed surface in the housing. The opposed surface is opposed to the mounting surface. The cooling member is arranged at part of the opposed surface, the part of the opposed surface projects toward the semiconductor devices, and the opposed surface is opposed to the two or more types of different-shape components.

Abstract: A driving circuit has a p-channel transistor and an n-channel transistor. A power switching element is set at an on state each time the p-channel transistor sets a charging line at a conductive state in response to a leading edge of an output pulse to supply a positive charge to a gate of the element through the charging line. The element is set at an off state each time the n-channel transistor sets a discharging line at a conductive state in response to a trailing edge of the output pulse to discharge the supplied charge through the discharging line. A through current occasionally flows through the transistors set at the on state together. The driving circuit has resistors between the transistors to suppress the through current.

Abstract: A driving circuit has a p-channel transistor and an n-channel transistor. A power switching element is set at an on state each time the p-channel transistor sets a charging line at a conductive state in response to a leading edge of an output pulse to supply a positive charge to a gate of the element through the charging line. The element is set at an off state each time the n-channel transistor sets a discharging line at a conductive state in response to a trailing edge of the output pulse to discharge the supplied charge through the discharging line. A through current occasionally flows through the transistors set at the on state together. The driving circuit has resistors between the transistors to suppress the through current.

Abstract: A cutting machine control determines a required stock-removal amount from a work for each of sections into which a tool path is divided, and feeds the rotating cutting tool at a speed that is controlled according to the required stock-removal volume so that the rotating cutting tool removes a predetermined or target stock-removal volume of material for the component path section from a work per unit time.

Abstract: A cutting machine control determines a required stock-removal amount from a work for each of sections into which a tool path is divided, and feeds the rotating cutting tool at a speed that is controlled according to the required stock-removal volume so that the rotating cutting tool removes a predetermined or target stock-removal volume of material for the component path section from a work per unit time.