Abstract: A motor controller for controlling a drive of a motor having plural phase windings includes upper and lower arm circuits and a control unit. The control unit switchingly controls ON/OFF of switches of the upper and lower arm circuits, for sequentially switching an energized phase of the motor. Then, from among the plural switches, a switch forming an energization path to the energized phase is designated as an energized phase switch with the others of the plural switches being designated as non-energized phase switches. Further, from among the non-energized phase switches, a switch forming a path of a reflux current that accompanies the switching of the energized phase is designated as a reflux switch. Then, the control unit performs an ON control of the energized phase switch in addition to performing an ON control of the reflux switch.

Abstract: A motor controller for controlling a drive of a motor having plural phase windings includes upper and lower arm circuits and a control unit. The control unit switchingly controls ON/OFF of switches of the upper and lower arm circuits, for sequentially switching an energized phase of the motor. Then, from among the plural switches, a switch forming an energization path to the energized phase is designated as an energized phase switch with the others of the plural switches being designated as non-energized phase switches. Further, from among the non-energized phase switches, a switch forming a path of a reflux current that accompanies the switching of the energized phase is designated as a reflux switch. Then, the control unit performs an ON control of the energized phase switch in addition to performing an ON control of the reflux switch.

Abstract: A pump control unit controls a fuel pump based on a control target value of an engine. A pump characteristic detection unit acquires a pump characteristic value among pump characteristic values, which indicate an operating state of a fuel pump and include a supplied current to the fuel pump, an applied voltage to the fuel pump, a generated voltage of the fuel pump, and a rotation speed of the fuel pump. A pump characteristic storage unit stores the acquired pump characteristic value together with the control target value. A determination threshold set unit sets a determination threshold value by using at least one of the stored pump characteristic value, the control target value, and a combination of at least two of the control target values. A fuel pump deterioration determination unit determines deterioration of the fuel pump by using the stored pump characteristic value and the determination threshold value.

Abstract: A microcomputer of a drive control device for controlling the driving of a brushless motor has a positioning part and a torque acceleration control unit. The positioning unit controls the power to be supplied to the windings, to thereby position the rotor at a drive start position which is a position of the rotor relative to the stator at which the drive control of the brushless motor can start, before starting the drive control of the brushless motor. The torque acceleration control unit controls the power to be supplied to the windings so that a torque acceleration falls within a predetermined range that the collision stress generated when the outer wall of the end of the shaft collides with the inner wall of the hole of an impeller (rotating member) is equal to or smaller than a predetermined value, when the rotor is positioned.

Abstract: A drive controller that controls a drive of a motor. The drive controller performs a collision force moderation control during a motor start time, during which a collision force in a collision between a shaft outwall with an impeller hole inwall for a positioning is moderated, by changing a power supply at a stage transition time of transiting from a position detection to a position determination. The maximum value of a first output value during a position detection time is set to be greater than a first threshold that at least causes a rotation number of the motor to yield a detectable induction voltage. A second output value during a position determination time is set to be lower than a second threshold that causes a wear or a breakage of an impeller by the collision force.

Abstract: A motor control apparatus includes a motor, a motor controller, and a connection line. The motor is mounted to a vehicle and has a metal housing. The motor controller is separately provided with the motor, includes a housing and a circuit portion, is connected to the motor through a load line, and drives the motor by a drive current transmitted through the load line. A ground line of the circuit portion is connected to a body of the vehicle as a body earth. The connection line directly connects the metal housing of the motor and the circuit portion of the motor controller without through the housing of the motor controller.

Abstract: A microcomputer of a drive control device for controlling the driving of a brushless motor has a positioning part and a torque acceleration control unit. The positioning unit controls the power to be supplied to the windings, to thereby position the rotor at a drive start position which is a position of the rotor relative to the stator at which the drive control of the brushless motor can start, before starting the drive control of the brushless motor. The torque acceleration control unit controls the power to be supplied to the windings so that a torque acceleration falls within a predetermined range that the collision stress generated when the outer wall of the end of the shaft collides with the inner wall of the hole of an impeller (rotating member) is equal to or smaller than a predetermined value, when the rotor is positioned.

Abstract: A motor control apparatus includes a motor, a motor controller, and a connection line. The motor is mounted to a vehicle and has a metal housing. The motor controller is separately provided with the motor, includes a housing and a circuit portion, is connected to the motor through a load line, and drives the motor by a drive current transmitted through the load line. A ground line of the circuit portion is connected to a body of the vehicle as a body earth. The connection line directly connects the metal housing of the motor and the circuit portion of the motor controller without through the housing of the motor controller.

Abstract: A drive controller that controls a drive of a motor. The drive controller performs a collision force moderation control during a motor start time, during which a collision force in a collision between a shaft outwall with an impeller hole inwall for a positioning is moderated, by changing a power supply at a stage transition time of transiting from a position detection to a position determination. The maximum value of a first output value during a position detection time is set to be greater than a first threshold that at least causes a rotation number of the motor to yield a detectable induction voltage. A second output value during a position determination time is set to be lower than a second threshold that causes a wear or a breakage of an impeller by the collision force.

Abstract: A motor controller is configured to perform positioning of a rotor of a brushless motor immediately when power supply is turned on, and not after actually receiving a target value related to control for the brushless motor from a main ECU, which determines the target value. The motor controller finishes or is performing the rotor positioning, when the target value is received from the main ECU. For this reason, the motor controller can start rotation control for the brushless motor in accordance with the received target value in a short period of time.

Abstract: A noble glass composition which is based on a known potassium-zinc crystal glass composition suitable for chemical strengthening, in which most of contained ZnO component is replaced with a combination of less expensive oxides. The noble glass composition is easily melted in a tank and formed by machine into table wares, and provides a chemical strengthened crystal glass article which has high practical strength as tableware and can be subjected to washing with an alkali.

Abstract: A motor controller is configured to perform positioning of a rotor of a brushless motor immediately when power supply is turned on, and not after actually receiving a target value related to control for the brushless motor from a main ECU, which determines the target value. The motor controller finishes or is performing the rotor positioning, when the target value is received from the main ECU. For this reason, the motor controller can start rotation control for the brushless motor in accordance with the received target value in a short period of time.

Abstract: [Object] To develop a noble glass composition which is based on a known potassium-zinc crystal glass composition suitable for chemical strengthening, in which most of contained ZnO component is replaced with a combination of far inexpensive other oxides, which is easily to melt in a tank and to form by machine into table wares, which satisfies the legal conditions as crystal glass specified in glass composition, refractive index, and density, and which is superior in chemical strengthening suitability; and to provide a chemical strengthened crystal glass article which has high practical strength as a table ware and can be subjected to washing with an alkali.

Abstract: [Object] This invention relates to crystal glass article not containing lead or barium that can be chemical strengthened easily and that is highly alkali-resistant and equivalent to lead crystal glass in quality. [Solving Means] Crystal glass article that can be chemical strengthened easily and that is highly alkali-resistant and equivalent to lead crystal glass in quality can be produced with a glass composition containing: 62% to 65% by weight of SiO2; 2% to 3.2% by weight of Al2O3; 10% to 12% by weight of Na2O; 8% by weight to less than 10.0% by weight of K2O; 3% to 4.2% by weight of CaO; 2% to 3.2% by weight of SrO; 6% to 7.2% by weight of ZnO; 2.2% to 3% by weight of TiO2; 0% to 0.4% by weight of Sb2O3; and 0% to 1.2% by weight of SnO2+Y2O3+La2O3+ZrO2.

Abstract: A noise free transceiver circuit includes a communication line, a power source line, a ground line, an output transistor having output terminals connected between the communication line and the ground line for outputting a communication signal to the communication line, a first circuit for applying a trapezoidal signal to the input terminal of the output transistor to turn on in synchronism with a transmission signal and a second circuit for turning off the output transistor when the level of the transmission signal is high. The output transistor is turned off when the communication signal is outputted. Therefore, noises of the power line are shut out of the output transistor.

Abstract: A noise free transceiver circuit includes a communication line, a power source line, a ground line, an output transistor having output terminals connected between the communication line and the ground line for outputting a communication signal to the communication line, a first circuit for applying a trapezoidal signal to the input terminal of the output transistor to turn on in synchronism with a transmission signal and a second circuit for turning off the output transistor when the level of the transmission signal is high. The output transistor is turned off when the communication signal is outputted. Therefore, noises of the power line are shut out of the output transistor.

Abstract: The vehicle generator regulating apparatus includes a switching device operating to allow a field current to flow into a field coil of the vehicle generator from a vehicle battery when applied with a voltage signal, a drive circuit applying the voltage signal to the switching device when supplied with a control signal, and a control circuit supplying the control signal to the drive circuit when the output voltage is detected to be not above a predetermined voltage. The drive circuit includes a charge pump circuit stepping up a DC voltage supplied from the battery to generate the voltage signal by repeatedly performing a cycle of charging and discharging multiple capacitors in synchronization with an oscillation signal from an oscillator circuit. The drive circuit is configured to lower the frequency of the oscillation signal when the vehicle generator is in a low power output state.

Abstract: The vehicle generator regulating apparatus includes a switching device operating to allow a field current to flow into a field coil of the vehicle generator from a vehicle battery when applied with a voltage signal, a drive circuit applying the voltage signal to the switching device when supplied with a control signal, and a control circuit supplying the control signal to the drive circuit when the output voltage is detected to be not above a predetermined voltage. The drive circuit includes a charge pump circuit stepping up a DC voltage supplied from the battery to generate the voltage signal by repeatedly performing a cycle of charging and discharging multiple capacitors in synchronization with an oscillation signal from an oscillator circuit. The drive circuit is configured to lower the frequency of the oscillation signal when the vehicle generator is in a low power output state.

Abstract: A method for forming perforations on a printed circuit board by means of press-working is disclosed. The perforations are used to facilitate the separation of a mother portion from the supplementary portions of a printed circuit board. The method is characterized in that the surface area of one side or both sides of the printed circuit board to be perforated is coated with copper film prior to the formation of the perforations in order to prevent cracks from forming around the perforations.

Abstract: A speaker system provided with a globular glass enclosure to which a speaker unit is attached, wherein the enclosure is mounted elastically on a support member which consists of an elastic material and has an opening to accommodate a bottom part of the enclosure therein. The direction of the speaker unit can be freely changed under a stable posture and the occurrence of box noise due to the insufficient contact between the enclosure and the support member is prevented. In the speaker system, the enclosure may be fixed firmly at the position of its notch opening to a baffle board made of a highly rigid and/or highly oscillation-damping material for fixing the speaker unit to the baffle board, and thus the occurrence of box noise coming from the transmission of the vibration of the speaker unit to the enclosure and also coming from the deformation of the opening of the enclosure to receive the speaker unit can be prevented.