Abstract: A discharge circuit discharges a smoothing capacitor that smooths a DC voltage. The discharge circuit incudes a resistive element connected in parallel with the smoothing capacitor, a transistor connected in series with the resistive element, and an adjustment circuit configured to adjust a voltage applied to a gate terminal of the transistor to turn and keep the transistor half on for a predefined time and then turn the transistor fully on, when discharging the smoothing capacitor through the resistive element and the transistor.

Abstract: A discharge circuit discharges a smoothing capacitor that smooths a DC voltage through a plurality of resistive elements mounted on a substrate. The discharge circuit includes a series connection of at least three resistive elements spaced apart from each other in a first direction and connected in series by wires. The resistive element positioned more centrally in the first direction, included in the series connection, has a lower resistance value. The resistive elements adjacent to each other in the first direction and included in the series connection are displaced from each other in a second direction perpendicular to the first direction.

Abstract: A drive control device is applicable to a vehicle including a first motor which drives a first wheel and a second motor which drives a second wheel. The drive control device includes a sensor, a torque setting section, an anomaly detection section, and an information output section. The sensor detects information about the drive control device. The torque setting section sets upper limit values of torques that can be generated by the first motor and the second motor based on the information detected by the sensor. The anomaly detection section detects an anomaly in the drive control device. In response to the anomaly detection section detecting the anomaly, the information output section outputs, to the torque setting section, setting information that sets the upper limit values of the torques of the first motor and the second motor to a common predetermined value, as the information.

Abstract: A mobile object includes: a first braking/driving torque application unit that applies first braking/driving torque to a right driving wheel; a second braking/driving torque application unit that applies second braking/driving torque to a left driving wheel; a right driven wheel and a left driven wheel each of which is constituted of a caster wheel; and a control unit that controls the first braking/driving torque application unit and the second braking/driving torque application unit. Moreover, the control unit is configured to perform turning, advancing/reversing and braking of the mobile object by controlling the first braking/driving torque and the second braking/driving torque or by controlling rotational speed of the right driving wheel and rotational speed of the left driving wheel.

Abstract: This vehicle comprises a first dynamo-electric machine that imparts torque to a first drive wheel, a second dynamo-electric machine that applies torque to a second drive wheel, a rotation speed sensor that acquires a first rotation speed of the first drive wheel, a rotation speed sensor that acquires a second rotation speed of the second drive wheel, and a control device. The control device includes a basic setting unit that sets a basic rotation speed, a differential setting unit that sets a differential rotation speed, and an action control unit that controls the operation of the first dynamo-electric machine and the second dynamo-electric machine so that an average value of the first rotation speed and the second rotation speed becomes the basic rotation speed, and a difference between the first rotation speed and the second rotation speed reaches the differential rotation speed.

Abstract: A rotational angle measurement apparatus is applicable to a rotary electric machine that includes an outer rotor rotatable around a predetermined reference axis, and a stator disposed radially inside the outer rotor. The rotational angle measurement apparatus includes at least one measurement portion mounted to the outer rotor, and a measuring member located radially outside the stator to face the at least one measurement portion. The measuring member is configured to measure a position of the at least one measurement portion.

Abstract: A control apparatus includes: a control unit that controls torque of a rotating electric machine by performing switching control of an inverter; a temperature sensor that detects a temperature of a temperature detection target which is at least one of the machine and the inverter; and a current sensor that detects electric current flowing through the temperature detection target and has higher responsiveness than the temperature sensor. The control unit includes an overheat protection unit that limits the torque of the machine when the temperature detection target is in an overheated state. The overheat protection unit determines whether the temperature detection target is in the overheated state based on the temperature detected by the temperature sensor when an operating point of the machine is within a continuous operation region, and based on the electric current detected by the current sensor when the operating point is within a short-time operation region.

Abstract: An inverter control device is for a vehicle including: a rotating electric machine that is an in-wheel motor integrated inside a drive wheel and includes a rotor including a magnet portion with a plurality of magnetic poles and a stator including multiphase stator windings without teeth protruding radially toward the rotor; and an inverter electrically connected to the rotating electric machine. The inverter control device includes: a control unit configured to perform PWM control to generate a drive signal for a switching element in the inverter based on a carrier signal and a command voltage in each phase in the overall operating region for an operating point defined by the rotation speed and the torque of the rotating electric machine; and an operation unit configured to operate the switching element based on the generated drive signal.

Abstract: A drive control device is applicable to a vehicle including a first motor which drives a first wheel and a second motor which drives a second wheel. The drive control device includes a sensor, a torque setting section, an anomaly detection section, and an information output section. The sensor detects information about the drive control device. The torque setting section sets upper limit values of torques that can be generated by the first motor and the second motor based on the information detected by the sensor. The anomaly detection section detects an anomaly in the drive control device. In response to the anomaly detection section detecting the anomaly, the information output section outputs, to the torque setting section, setting information that sets the upper limit values of the torques of the first motor and the second motor to a common predetermined value, as the information.

Abstract: A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting 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 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: A rotating electric machine for vehicles has a rotor, a stator having stator windings, MOS module groups as electric power converters, a rotation angle sensor that detects a rotation angle of the rotor, and a control circuit that has a rotation angle sensor abnormality determining section that determines whether abnormalities of the rotation angle sensor exist or not based on a phase voltage induced by the stator windings during the power generation.

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: 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 rotating electric machine for vehicles has a rotor, a stator having stator windings, MOS module groups as electric power converters, a rotation angle sensor that detects a rotation angle of the rotor, and a control circuit that has a rotation angle sensor abnormality determining section that determines whether abnormalities of the rotation angle sensor exist or not based on a phase voltage induced by the stator windings during the power generation.

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: A rotary electric machine for a vehicle is provided. The rotary electric machine includes a power system circuit which has a power element and is grounded via a first ground terminal and a first connecting line and a control system circuit which controls the power system circuit and is grounded via a second ground terminal and a second connecting line.

Abstract: A vehicle generator includes armature windings, rectifier module groups, an upper MOS on-timing determining section, a lower MOS on-timing determining section, a rotational speed calculating section, a target electrical angle setting section for setting a value of a target electrical angle, an upper MOS off-timing determining section, a lower MOS off-timing determining section, and drivers for driving high-side and low-side MOS transistors constituting upper and lower arms. The target electrical angle represents a margin period between when the low-side MOS transistor was turned off a half cycle ago and the moment when the lower arm on-period has ended. The upper MOS off-timing determining section and the lower MOS off-timing determining section set off timings of the MOS transistors such that the margin period is equivalent to the set value of the target electrical angle.