Abstract: A light source device that supplies a constant current to a diode load that includes a plurality of light-emitting elements connected in series. The light source device includes a power supply circuit connected to the diode load and a peak current limiting circuit connected in series to the diode load. The peak current limiting circuit includes a current detector that is connected in series to the diode load and a current-regulating circuit that controls a current to the diode load by a detection voltage of the current detector. Further, the current detector has a series circuit including a resistor and a coil.

Abstract: A wireless power supply device (1) includes a first turn-on control circuit (31) to control a turn-on timing of a switching device (SW), and a second turn-on control circuit (32) to control a turn-on timing of an auxiliary switching device (SWS), and the switching device (SW) and the auxiliary switching device (SWS) are operable to perform a zero voltage switching operation.

Abstract: A wireless electrical power supply apparatus 100 includes a first electrical power supply unit 101, a second electrical power supply unit 104, voltage control circuits 113 and 123 configured to control a first voltage difference between a first input voltage E1 and a first output voltage E2 during forward power transmission and a second voltage difference between a second input voltage E2 and a second output voltage E1 during reverse power transmission, a second switching control circuit 121, 122 configured to turn off a second transistor Q2 during the forward power transmission and thereby cause a second diode D2 to perform rectification, and a first switching control circuit 111, 112 configured to turn off a first transistor Q1 during the reverse power transmission and thereby cause a first diode D1 to perform rectification.

Abstract: A wireless electrical power supply apparatus 100 includes a first electrical power supply unit 101, a second electrical power supply unit 104, voltage control circuits 113 and 123 configured to control a first voltage difference between a first input voltage E1 and a first output voltage E2 during forward power transmission and a second voltage difference between a second input voltage E2 and a second output voltage E1 during reverse power transmission, a second switching control circuit 121, 122 configured to turn off a second transistor Q2 during the forward power transmission and thereby cause a second diode D2 to perform rectification, and a first switching control circuit 111, 112 configured to turn off a first transistor Q1 during the reverse power transmission and thereby cause a first diode D1 to perform rectification.

Abstract: The present disclosure provides a vacuum pump with which size and weight reduction, improvement of workability, and cost reduction can be realized. Electrical connection between a pump main body that has a rotor supported by a magnetic bearing and a control unit that controls the drive of the pump main body is established by a flexible printed wiring board configured by printing an electric circuit on a surface of a sheet-like insulating substrate.

Abstract: Provided is a vacuum pump apparatus which allows reductions in thickness, weight, size, and cost of a vacuum pump control device. In the vacuum pump apparatus, a pump main body unit and a control unit which controls driving of the pump main body unit are integrated with each other. The vacuum pump apparatus has a configuration in which a spacer configured to support a load applied to a housing of the control unit is provided between a base of the pump main body unit and the housing of the control unit.

Abstract: The control apparatus for a compression ignition type engine includes a plurality of cylinder inner pressure sensors that detect pressure in each cylinder, and a combustion control unit. The combustion control unit corrects a target fuel injection amount of each cylinder by an injector based on a deviation between a predicted combustion period that is a period from an ignition timing by an ignition plug to a predetermined mass combustion timing and that is obtained based on a preset combustion model, and an actual combustion period that is a period from the ignition timing by the ignition plug to an actual combustion timing and that is obtained based on cylinder inner pressure, such that the period from the ignition timing by the ignition plug to the predetermined mass combustion timing, which is the timing when fuel having a predetermined mass ratio combusts, is equalized in each cylinder.

Abstract: A vacuum pump includes a regenerative resistor removed from the control apparatus and disposed in the vacuum pump. More specifically, the regenerative resistor is detached from a control board (control apparatus) on which a control circuit is mounted, and disposed in a base of the vacuum pump, and connected to the control board via a wire. Further, a gap is provided between the base of the vacuum pump and the control apparatus. Moreover, a cover (outer covering body) is provided in the regenerative resistor disposed in the base part of the vacuum pump and the wire part. Since the regenerative resistor is provided in the base of the vacuum pump, which has a large heat capacity, a temperature increase of the control apparatus is reduced.

Abstract: A wireless electrical power supply apparatus 100 includes a first electrical power supply unit 101, a second electrical power supply unit 104, voltage control circuits 113 and 123 configured to control a first voltage difference between a first input voltage E1 and a first output voltage E2 during forward power transmission and a second voltage difference between a second input voltage E2 and a second output voltage E1 during reverse power transmission, a second switching control circuit 121, 122 configured to turn off a second transistor Q2 during the forward power transmission and thereby cause a second diode D2 to perform rectification, and a first switching control circuit 111, 112 configured to turn off a first transistor Q1 during the reverse power transmission and thereby cause a first diode D1 to perform rectification.

Abstract: A vacuum pump has a hermetic connector disposed on a base of a body of the vacuum pump. The hermetic connector has a plurality of pins connected to a plurality of electrical cables leading to the inside of the pump body. The connector is longer in a lateral direction than in an axial direction so that the connector is horizontally long in a circumferential direction of the pump body.

Abstract: A combustion control device for an engine includes a plurality of cylinders, a surge tank disposed in an intake path to the cylinders, an independent intake passage connecting the surge tank and an intake port of each of the cylinders, a fuel injection valve that is disposed for each of the cylinders and that supplies fuel into each of the cylinders, and a control unit that controls a fuel injection amount of each of the fuel injection valves according to an engine operating state. The control unit corrects a target fuel injection amount of each of the cylinders, the target fuel injection amount being determined according to the engine operating state, based on a re-intake correction amount set in each of the cylinders according to a re-intake amount of intake air from the intake port in internal EGR in each of the cylinders.

Abstract: A control device for an engine is provided, which includes a combustion controlling module, and an ignition retard determining module configured to determine whether there is a request for an ignition retard for retarding an ignition timing of an ignition plug. When the controlling module controls the ignition plug and an injector so that the SPCCI combustion is performed and there is not the ignition retard request, the controlling module executes a control in which the entire fuel to be injected in one cycle is injected in an intake stroke and a jump-spark ignition is carried out at a basic ignition timing, and when there is the ignition retard request, the controlling module executes a control in which an injection is performed in an intake stroke, a portion of the entire fuel is injected in a compression stroke, and the ignition timing is retarded from the basic ignition timing.

Abstract: An electromagnetic rotating apparatus may include an electromagnet winding that consumes power generated during regeneration. A motor voltage monitoring circuit detects that a voltage at a motor driving main circuit is higher than a voltage during normal operation, due to overshoot or the like after arrival at a set speed during deceleration or acceleration of a motor. The motor voltage monitoring circuit transmits a high-voltage detection signal to a braking current adjusting circuit and a magnetic bearing control circuit. Upon receiving the high-voltage detection signal, the braking current adjusting circuit reduces a braking current command value for the motor so as to maintain an excitation voltage for the motor constant or reduce this excitation voltage, and an amplifier control circuit in the magnetic bearing control circuit increases a bias current flowing through an electromagnet winding to increase power consumption.

Abstract: The control apparatus for a compression ignition type engine includes a plurality of cylinder inner pressure sensors that detect pressure in each cylinder, and a combustion control unit. The combustion control unit corrects a target fuel injection amount of each cylinder by an injector based on a deviation between a predicted combustion period that is a period from an ignition timing by an ignition plug to a predetermined mass combustion timing and that is obtained based on a preset combustion model, and an actual combustion period that is a period from the ignition timing by the ignition plug to an actual combustion timing and that is obtained based on cylinder inner pressure, such that the period from the ignition timing by the ignition plug to the predetermined mass combustion timing, which is the timing when fuel having a predetermined mass ratio combusts, is equalized in each cylinder.

Abstract: A combustion control device for an engine includes a plurality of cylinders, a surge tank disposed in an intake path to the cylinders, an independent intake passage connecting the surge tank and an intake port of each of the cylinders, a fuel injection valve that is disposed for each of the cylinders and that supplies fuel into each of the cylinders, and a control unit that controls a fuel injection amount of each of the fuel injection valves according to an engine operating state. The control unit corrects a target fuel injection amount of each of the cylinders, the target fuel injection amount being determined according to the engine operating state, based on a re-intake correction amount set in each of the cylinders according to a re-intake amount of intake air from the intake port in internal EGR in each of the cylinders.

Abstract: A control device for an engine is provided, which includes a combustion controlling module, and an ignition retard determining module configured to determine whether there is a request for an ignition retard for retarding an ignition timing of an ignition plug. When the controlling module controls the ignition plug and an injector so that the SPCCI combustion is performed and there is not the ignition retard request, the controlling module executes a control in which the entire fuel to be injected in one cycle is injected in an intake stroke and a jump-spark ignition is carried out at a basic ignition timing, and when there is the ignition retard request, the controlling module executes a control in which an injection is performed in an intake stroke, a portion of the entire fuel is injected in a compression stroke, and the ignition timing is retarded from the basic ignition timing.

Abstract: Provided is a vacuum pump apparatus which allows reductions in thickness, weight, size, and cost of a vacuum pump control device. In the vacuum pump apparatus, a pump main body unit and a control unit which controls driving of the pump main body unit are integrated with each other. The vacuum pump apparatus has a configuration in which a spacer configured to support a load applied to a housing of the control unit is provided between a base of the pump main body unit and the housing of the control unit.

Abstract: A vacuum pump has a hermetic connector disposed on a base of a body of the vacuum pump. The hermetic connector has a plurality of pins connected to a plurality of electrical cables leading to the inside of the pump body. The connector is longer in a lateral direction than in an axial direction so that the connector is horizontally long in a circumferential direction of the pump body.