Abstract: In a rotary electric machine, an on-timing setter sets on-timings of each of a high-side switching element and a low-side switching element for each of at least two three-phase stator windings. An off-timing setter sets off-timings of each of the high-side switching element and the low-side switching element. An off-timing fault determiner determines a fault of an off-timing of a target switching element as one of the high-side switching element and the low-side switching element set by the off-timing setter when a time interval from the off-timing of the target switching element set by the off-timing setter to time when a phase voltage corresponding to the target switching element reaches a threshold after the off-timing thereof is shorter than a preset value.

Abstract: An elastic wave device includes a piezoelectric substrate, an IDT electrode disposed on the piezoelectric substrate, a wiring electrode disposed on the piezoelectric substrate and connected to the IDT electrode, a first insulator disposed on the piezoelectric substrate to seal the IDT electrode and the wiring electrode, a resin layer provided on the first insulator, an inductor electrode disposed on the resin layer, a second insulator disposed on the resin layer to cover the inductor electrode, a terminal electrode disposed on the second insulator, and a connecting electrode passing through the first insulator, the second insulator, and the resin layer to electrically connect the wiring electrode, the terminal electrode, and the inductor electrode. The first insulator includes a resin and filler dispersed in the resin. A density of filler in the resin layer is smaller than an average density of the filler in the first insulator.

Abstract: A vehicle-mounted electric rotating machine includes a field winding wound on a rotor for magnetizing a field pole of the rotor, a stator winding for generating an AC voltage in accordance with a rotating magnetic field generated by the field pole, a power converter for converting the AC voltage to a DC voltage and outputting the DC voltage through a first power supply line connected to an output terminal thereof, and a load dump handling section for performing a load dump protection operation when a voltage of the output terminal of the power converter exceeds a threshold voltage. The load dump handling section is supplied with operating power through a second power supply line provided separately from the first power supply line.

Abstract: In a power converting device, a controller determines a combination pattern of a first energization pattern for the first set of the at least one-phase winding and a second energization pattern for the second set of the at least one-phase winding. The first and second energization patterns respectively include at least a first energization duration for the first set of the at least one-phase winding and a second energization duration for the second set of the at least one-phase winding. The controller supplies a drive pulse signal, whose on duration is based on the determined combination pattern, to the switch to thereby control on-off operations of the switch.

Abstract: A rotary electric machine for a vehicle that is capable of starting synchronous rectification through switching elements after having ensured absence of a short circuit fault. The rotary electric machine includes a multi-phase armature winding, a switching element set that includes a plurality of pairs of upper-arm and lower-arm switching elements to form a bridge rectification circuit together with the armature winding, an on/off-timing setter that sets on/off-timing of each switching element, a switching element driver that drives each switching element at the on/off-timing set by the on/off-timing setter; and a synchronous control start determiner that determines timing when an energization period for the upper-arm switching element and an energization period for the lower-arm switching element occur alternately as start timing of the synchronous rectification.

Abstract: In a vehicular rotary electric machine, a switching section includes a bridge circuit having plurality of upper arms and plurality of lower arms. The arms include switching elements. A diode is connected in parallel to each switching element. One end of the switching element of each of the upper arms is connected to a positive terminal of a battery and one end of the switching element of each of the lower arms is connected to a negative terminal of the battery via a vehicle body. The switching section rectifies induced phase voltage of an armature winding. A section sets ON-timing of the switching elements. A section sets OFF-timing of the switching elements. When the switching element of each lower arm is OFF, a detector detects an energization period in which current flows to the diode. A calculator calculates a rotation frequency based on the detected energization period.

Abstract: A generator has a field coil of a rotor, an armature coil of a stator, a control device supplying an exciting current to the field coil when detecting rotation of the rotor, and a control circuit alternately setting an upper arm transistor and a lower arm transistor in on state in a rectifier module to generate a phase voltage. The control device detects the rotation from a periodic change in a sign of the difference between the phase voltage and a reference voltage. When the rectifier module is overheated, the control circuit sets the upper arm transistor in the off state and sets the lower arm transistor in the on state to almost fix the phase voltage, the control device detects no rotation and stops supplying the exciting current, and the rectifier module generates no phase voltage to decrease temperature of the rectifier module.

Abstract: A vehicle-use electric rotating machine includes a switching section having upper and lower arms each constituted of a switching element parallel-connected with a diode to rectify an AC voltage induced in each phase winding of the electric rotating machine, an on-timing setting section for setting an on timing of each of the switching elements, an off-timing setting section for setting an off timing of each of the switching elements such that, when a time period from when a phase voltage of the phase winding reaches a first threshold value to when the phase voltage reaches a second threshold value different from the first threshold value is referred to as a conduction period, a time period in electrical angle from when the switching element is turned off to when the conduction period ends is equal to a target electrical angle set depending on the rotational speed of the electric rotating machine.

Abstract: In a rotary electric machine, a load-dump protector turns on a switching element as a low-side rectifying element for at least one of plural-phase stator windings when the output voltage exceeds a first threshold voltage due to load dump. The load dump protector determines a turnoff timing of the switching element as the low-side rectifying element for the at least one of the plural-phase stator windings after the output voltage, which exceeded the first threshold voltage once, falls below a second threshold voltage. The second threshold voltage is set to be lower than the first threshold voltage. The load dump protector turns off, at the determined turnoff timing, the switching element as the low-side rectifying element for the at least one of the at least two-phase stator windings.

Abstract: An elastic wave device includes a piezoelectric substrate, an IDT electrode disposed on the piezoelectric substrate, a wiring electrode disposed on the piezoelectric substrate and connected to the IDT electrode, a first insulator disposed on the piezoelectric substrate to seal the IDT electrode and the wiring electrode, a resin layer provided on the first insulator, an inductor electrode disposed on the resin layer, a second insulator disposed on the resin layer to cover the inductor electrode, a terminal electrode disposed on the second insulator, and a connecting electrode passing through the first insulator, the second insulator, and the resin layer to electrically connect the wiring electrode, the terminal electrode, and the inductor electrode. The first insulator includes a resin and filler dispersed in the resin. A density of filler in the resin layer is smaller than an average density of the filler in the first insulator.

Abstract: A generator has a field coil of a rotor, an armature coil of a stator, a control device supplying an exciting current to the field coil when detecting rotation of the rotor, and a control circuit alternately setting an upper arm transistor and a lower arm transistor in on state in a rectifier module to generate a phase voltage. The control device detects the rotation from a periodic change in a sign of the difference between the phase voltage and a reference voltage. When the rectifier module is overheated, the control circuit sets the upper arm transistor in the off state and sets the lower arm transistor in the on state to almost fix the phase voltage, the control device detects no rotation and stops supplying the exciting current, and the rectifier module generates no phase voltage to decrease temperature of the rectifier module.

Abstract: In a vehicular rotary electric machine, a switching section includes a bridge circuit having plurality of upper arms and plurality of lower arms. The arms include switching elements. A diode is connected in parallel to each switching element. One end of the switching element of each of the upper arms is connected to a positive terminal of a battery and one end of the switching element of each of the lower arms is connected to a negative terminal of the battery via a vehicle body. The switching section rectifies induced phase voltage of an armature winding. A section sets ON-timing of the switching elements. A section sets OFF-timing of the switching elements. When the switching element of each lower arm is OFF, a detector detects an energization period in which current flows to the diode. A calculator calculates a rotation frequency based on the detected energization period.

Abstract: In a rotary electric machine, an on-timing setter sets on-timings of each of a high-side switching element and a low-side switching element for each of at least two-phase stator windings. An off-timing setter sets off-timings of each of the high-side switching element and the low-side switching element. An off-timing fault determiner determines a fault of an off-timing of a target switching element as one of the high-side switching element and the low-side switching element set by the off-timing setter when a time interval from the off-timing of the target switching element set by the off-timing setter to time when a phase voltage corresponding to the target switching element reaches a threshold after the off-timing thereof is shorter than a preset value.

Abstract: A vehicle-use electric rotating machine includes a switching section having upper and lower arms each constituted of a switching element parallel-connected with a diode to rectify an AC voltage induced in each phase winding of the electric rotating machine, an on-timing setting section for setting an on timing of each of the switching elements, an off-timing setting section for setting an off timing of each of the switching elements such that, when a time period from when a phase voltage of the phase winding reaches a first threshold value to when the phase voltage reaches a second threshold value different from the first threshold value is referred to as a conduction period, a time period in electrical angle from when the switching element is turned off to when the conduction period ends is equal to a target electrical angle set depending on the rotational speed of the electric rotating machine.

Abstract: A rotary electric machine for a vehicle that is capable of starting synchronous rectification through switching elements after having ensured absence of a short circuit fault. The rotary electric machine includes a multi-phase armature winding, a switching element set that includes a plurality of pairs of upper-arm and lower-arm switching elements to form a bridge rectification circuit together with the armature winding, an on/off-timing setter that sets on/off-timing of each switching element, a switching element driver that drives each switching element at the on/off-timing set by the on/off-timing setter; and a synchronous control start determiner that determines timing when an energization period for the upper-arm switching element and an energization period for the lower-arm switching element occur alternately as start timing of the synchronous rectification.

Abstract: In a rotary electric machine, a load-dump protector turns on a switching element as a low-side rectifying element for at least one of plural-phase stator windings when the output voltage exceeds a first threshold voltage due to load dump. The load dump protector determines a turnoff timing of the switching element as the low-side rectifying element for the at least one of the plural-phase stator windings after the output voltage, which exceeded the first threshold voltage once, falls below a second threshold voltage. The second threshold voltage is set to be lower than the first threshold voltage. The load dump protector turns off, at the determined turnoff timing, the switching element as the low-side rectifying element for the at least one of the at least two-phase stator windings.

Abstract: An apparatus to control an electric motor to drive an electric-powered vehicle includes an accelerator position detector, a current controller to provide current to the electric motor through an inverter, a semiconductor device of the current controller configured to operate the inverter in response to a detected accelerator position, and a torque compensator to supply the electric motor with a modified current of the semiconductor device, wherein the torque compensator is configured to provide the modified current to the electric motor at a predetermined interval of time in response to a temperature increase in the semiconductor device when the detected accelerator position exceeds a predetermined threshold.

Abstract: An apparatus to control an electric motor to drive an electric-powered vehicle includes an accelerator position detector, a current controller to provide current to the electric motor through an inverter, a semiconductor device of the current controller configured to operate the inverter in response to a detected accelerator position, and a torque compensator to supply the electric motor with a modified current of the semiconductor device, wherein the torque compensator is configured to provide the modified current to the electric motor at a predetermined interval of time in response to a temperature increase in the semiconductor device when the detected accelerator position exceeds a predetermined threshold.

Abstract: A coil component of the present invention has prismatic base body (1), copper plated layer (2) formed on the outer periphery of base body (1), coil section (3) that is formed by spirally grooving copper plated layer (2) and has linear section (3a) and groove (3b), exterior section (8) formed on coil section (3), and electrode section (9). Insulating coating layer (4) is disposed between copper plated layer (2) formed on the outer periphery of longitudinal section (1a) of base body (1) and exterior section (8). The copper plated layer of the coil section can be suppressed from being exposed at the surface of exterior section (8).

Abstract: Method of manufacturing a chip inductor including the steps of, a conductive layer forming process for forming conductive layer 4 on an outer periphery 2 and end surfaces 3 of a substrate 1, a coil portion forming process for forming coil portion 7 having conductor 5 and groove 6 by cutting spirally the conductive layer 4, an etching process for etching the substrate 1 having the coil portion 7 formed thereon; an insulation resin coating process for forming outer coating 8 by coating a surface of the conductive layer 4 with insulation resin 13; and an electrode forming process for forming electrodes 9 at both ends of the coil portion 7, and for making electric contacts between electrodes 9 and the conductive layer 4. A chip inductor having a flattened mounting surface of the outer coating is obtained when insulation resin layer 8 is formed by an electrodeposition method in the insulation resin coating process. The chip inductor can be securely mounted to a circuit board.