Denso Corporation

Takatoshi Inokuchi

Tadatoshi Asada

Toshinori Maruyama

Masaya Nakanishi

Asaka Kimura

Atsushi Umeda

Makoto Taniguchi

Hiroshi Shibata

Fuyuki Maehara

Koji Tanaka

Tomomi Tsuzuki

Yasuhiro Takase

Atsushi Ichikawa

A controller-integrated rotating electric machine includes a rotating electric machine having a rotor, a stator, and a housing, and a controller having a plurality of switching element modules. Cooling fins having insulating coatings on surfaces thereof facing the switching element modules are bonded to the switching element module. The controller-integrated rotating electric machine of which the cooling fins are electrically insulated by having the cooling fins having the insulating coating on the surfaces facing the switching element modules, so that the electrolytic corrosion between the cooling fins and the heat sinks of the switching element modules is suppressed from occurring.

Controller-integrated rotating electric machine

In a rotary electric machine, a modulation signal generator generates a modulation signal including information indicative of rotation of a rotor based on change of a voltage at an output end of a stator winding, and outputs the modulation signal. A rectifying unit alternately turns on and off the switch to rectify the voltage at an output end of the stator winding, thus generating a rectified voltage. An excitation current supplying circuit is communicably connected to the modulation signal generator via a communication line, and starts a supply of an excitation current to the excitation winding of the rotor to induce a rotating magnetic field in the stator winding when the modulation signal output from the modulation signal generator is input thereto via the communication line.

Rotary electric machine capable of detecting malfunction in switch

In a power generator, a determiner determines whether a phase voltage output from each of multiphase armature windings has exceeded a threshold voltage. A turn-on unit turns on at least one of the protective switches as a target protective switch to limit the output voltage of the rectifier circuit to be lower than the threshold voltage upon the phase voltage output from at least one of the multiphase armature windings corresponding to the at least one of the protective switches has exceeded the threshold voltage.

Power generator with load-dump protection

An electric rotating machine for a vehicle is equipped with a load dump protector. The load dump protector works to selectively perform a first and a second load dump protection operation to suppress a voltage surge arising from the load dump. When a rate at which an output voltage from the electric rotating machine is determined to be smaller than a given value, the load dump protector waits for stating the first load dump protection operation until the time when a voltage surge arising from changing of switching devices of a rectifier module of the electric rotating machine is expected to be suppressed and then performs the first load dump protection operation. When the rate is greater than the given value, the load dump protector immediately initiates the second load dump protection operation. This ensures the stability in eliminating the risk of a voltage surge arising from the load dump.

Electric rotating machine with load dump protector

An alternator has rectifying module groups. The rectifying module groups form a bridge circuit. The rectifying module groups have a load dump protection judgment section for monitoring an output voltage of rectifying module groups. When the monitored output voltage exceeds a first threshold voltage, the load dump protection judgment section provides to a control section an instruction to turn on MOS transistors in a lower arm of the bridge circuit at a time when a predetermined delay time has elapsed. When a second threshold voltage is lower than the first threshold voltage and the monitored output voltage becomes less than the second threshold voltage after the monitored output voltage exceeds the first threshold voltage, the load dump protection judgment section provides to the control circuit an instruction to turn on the MOS transistors in the lower arm after the MOS transistors are turned off during a predetermined time length.

Electric rotary machine for motor vehicle

A semiconductor package includes a metal plate, a power element, a lead frame having a die pad, a resin sheet having insulation properties, a control circuit that controls the power element, and a mold resin. The power element is mounted on the die pad, and the die pad is mounted on the metal plate via the resin sheet. The resin sheet is expanded including at least a lower surface of the die pad while the lower surface of the resin sheet is smaller than an surface of the metal plate, and the control circuit is arranged in a region on the metal plate, which region is other than the region where the power element is arranged.

Heat radiation member for a semiconductor package with a power element and a control circuit

A rotary electric machine for vehicles is provided, which includes a rotor, a stator disposed opposed to the rotor, a frame made of aluminum and supporting the rotor and the stator, and a rectifier secured to an outer end face of the frame and having low-loss elements as rectifying elements. A heat insulator is disposed between the rectifier and the frame. With this configuration, deterioration can be prevented in the overall cooling properties, while at the same time the cooling properties of the rectifier can be enhanced.

Rotary electric machine for vehicles

A rotary electric machine for a vehicle includes a rotor, a stator and a rectifying device for current AC/DC conversion. The machine operates as a motor and a generator. The machine includes a multi-phase windings, switching elements forming a rectifying device, and a controller for controlling a current path of the multi-phase windings by switching the switching elements on and off to perform two modes of operation. The switching elements are switched such that one end of each windings is connected to either a high electrical potential end or a low electrical potential end of the rectifying device and the other ends of the windings connected together to be the same electrical potential are connected to either the high electrical potential end or the low electrical potential end in the rectifying device.

On-vehicle rotary electric machine operating on two modes of rectification

In a control system for controlling a power generator based on a command value associated with a control parameter, a receiver receives the command signal, a detector detects the command value included in the received command signal, and a determiner determines whether a duration of the detected command value being invariant within a predetermined range exceeds a predetermined allowed duration. In the control system, a controller controls an output of the power-generator based on a predetermined default value within the predetermined range in place of the command value when it is determined that the duration of the detected command value being invariant within the predetermined range exceeds the predetermined allowed duration.

Control system for controlling output of power generator

According to the present invention, there is provided a control apparatus for an automotive alternator which includes a switch, a target voltage setter, a voltage regulator, and a disconnection detector. The switch is configured to be selectively turned on and off so as to intermittently excite the alternator. The target voltage setter works to set a target voltage. The voltage regulator works to regulate an output voltage of the alternator to the target voltage through controlling on/off operation the switch. The disconnection detector works to detect disconnection between the alternator and an on-board battery to be charged by the alternator. The disconnection detector is configured to detect the disconnection, when the target voltage is changed from a lower value to a higher value, based on a time required for the voltage regulator to bring the output voltage of the alternator from the lower value to the higher value.

Control apparatus for automotive alternator having capability of reliably detecting disconnection between alternator and battery

A control apparatus for a vehicle generator includes a switch, a regulator, a fault condition detector, and a PWM signal generator. The switch is selectively turned on and off so as to intermittently excite the generator. The regulator controls on/off operation of the switch so as to bring an output of the generator into agreement with a target value. The fault condition detector detects a fault condition of the generator. The PWM signal generator generates and outputs a PWM signal that has a duty determined as a function of a duty of the on/off operation of the switch and a frequency determined based on if the fault condition of the generator is detected by the fault condition detector. Consequently, the control apparatus can inform an external control apparatus of the duty of the on/off operation of the switch and the fault condition of the generator with the single PWM signal.

Control of vehicle generator using PWM signal with specially determined duty and frequency

A vehicle generating system includes a generator for a vehicle, a voltage regulator that supplies field current to the field coil at a variable duty ratio, a field current sensor that detects field current amount, a signal transmitting circuit that transmits a signal representing the detected field current amount and the duty ratio and an electronically controlling unit that receives the signal representing the detected field current amount and the duty ratio and controls the engine according to one of the detected field current amount and the duty ratio.

Vehicle generator and vehicle generating system

A power generating system for a vehicle is configured to include a power generator, a voltage control device which controls an output voltage of the power generator, a battery which is charged by output power of the power generator, and an ECU which transmits a power generation suppression signal for suppressing power generation by the power generator when a predetermined condition is satisfied toward the voltage control device. The ECU detects a state of the battery, and inhibits transmission of the power generation suppression signal when quantity of this state is below a predetermined value.

Growing community of inventors

Kariya, Japan

Takatoshi Inokuchi