Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Panasonic Corporation

Yoshihiko Maeda

Toshihiro Matsumoto

Hiroaki Sagara

Hiroshi Takao

Toshihiro Suhara

Hoshihito Okada

Yoichi Enomoto

Tatsuaki Tanaka

Yoshinori Hayashi

Junichi Yukawa

Naoya Iwasaki

Hisazumi Watanabe

Masaru Tanaka

Hiroto Nishida

Kenji Urushihara

Masakatsu Fujiwara

Akitaka Yoshikawa

Satoshi Okawa

Yuji Yamaguchi

Yuji Aoki

Tatsuki Tanaka

A vehicle driving device includes an inverter which drives a motor. The inverter includes: a three-phase bridge circuit including a plurality of switching elements; a three-phase short circuit which short-circuits three phases of the motor via the three-phase bridge circuit; and a control circuit. The control circuit includes: a microprocessor which drives the three-phase bridge circuit; a malfunction notification circuit which outputs a malfunction notification signal when the microprocessor is malfunctioning; and a latch circuit which holds the malfunction notification signal outputted from the malfunction notification circuit. The control circuit outputs a three-phase short-circuit drive signal which drives the three-phase short circuit, based on the malfunction notification signal held by the latch circuit.

Vehicle driving device

A vehicle driving apparatus includes an inverter which drives a permanent magnet motor. The inverter includes a three-phase bridge circuit including a plurality of switch elements, a drive circuit connected to the three-phase bridge circuit, a control circuit connected to the drive circuit, and an abnormality detecting unit which detects abnormality of the inverter. The drive circuit includes a three-phase-short-circuit-forming circuit which causes three phases of the permanent magnet motor to form short circuits, an abnormality accepting terminal which accepts an abnormality signal output from the abnormality detecting unit, and a check terminal which accepts an active check signal for causing the three-phase-short-circuit-forming circuit to perform three-phase short circuit control.

Vehicle driving apparatus

The present disclosure reduces heat concentration on switching elements. A plurality of high-side transistors are connected in parallel to constitute high-side switching element. A plurality of low-side transistors are connected in parallel to constitute low-side switching element. The plurality of high-side transistors are arranged, one by one, next to the plurality of low-side transistors.

Substrate mounted inverter device

A vehicle power supply system has a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a DC-DC converter, and a controller. In a case where power is supplied to both of a starter and an electrical component from any one of a first battery and a second battery, the controller causes power to be supplied to the electrical component via the DC-DC converter.

Vehicle power supply system

A motor driving circuit has a supply line connected to a DC power source, an inverter whose input side is connected to the supply line and whose output side is connected to a motor, a power switch inserted in the supply line for switching the supply line between conducting and cut-off states, a voltage detector for detecting a voltage between the direct-current power source and the power switch, and an insulation resistance detector for first detecting, based on a result of detection by the voltage detector with the power switch in the cut-off state, an insulation resistance on the preceding-stage side of the power switch and subsequently detecting, based on a result of detection by the voltage detector with the power switch in the conducting state, an insulation resistance on the succeeding-stage side of the power switch.

Motor driving circuit, motor device, and electric vehicle

A motor drive circuit comprises: a DC power supply; power supply lines; an inverter which has upper arm switch elements and lower arm switch elements; and a detection unit for detecting, based on a power state on the previous stage side of the inverter, the insulation resistances of the motor drive circuit and the motor. The detection unit performs a first detection operation for detecting the insulation resistances by using the output of the DC power supply while the upper arm switch elements and the lower arm switch elements are all turned off and a second detection operation for detecting the insulation resistances by using the output of the DC power supply while the elements of one of the upper arm switch elements and the lower arm switch elements are all turned off and at least one of the elements of the other one is turned on.

Motor drive circuit, motor device, and moving vehicle

The present invention provides a disc drive apparatus capable of identifying a disc (12 cm) having a small data area (8 cm) in central as same as an ordinary 12 cm disc. The apparatus having a light receiving unitand a push switch. The unitis arranged in a position where the unitdetects the disc having the small data area in central when the switchdetects the same, and where the unitdoes not detect a disc (12 cm) having a hole (8 cm) in central when thedetects the same. The apparatus also has an disc identifier for identifying type of the disc based on the detected results of the light receiving units and/or the push switches.

Disc drive apparatus

An electrically assisted vehicle includes a vehicle body having a driving wheel driven by human driving power and electric driving power, a driving power applying section for applying the human driving power to drive the driving wheel, a torque detection section to detect the human driving power applied to the driving power applying section, a motor to auxiliarily drive the driving wheel by the electric driving power, a battery to supply power for the motor, and a control section to control the motor according to a result detected by the torque detection section, wherein the control section has a plurality of switchable assist modes relating to an assist ratio of the electric driving power to the human driving power.

Electrically assisted vehicle

A torque limiting device for motors in electrically driven vehicles includes a control device for controlling an electric driving power supplied to a motor in an electrically driven vehicle; a detecting section for detecting a driven state of the motor and outputting an output signal of the motor; and an upper electric driving power limit setting device in which a plurality of restricting values corresponding to the output signal from the detecting section are previously set, wherein the upper electric driving power limit setting device gives a command to the control device to restrict an upper limit of the driving power on the basis of one of the plurality of restricting values when the output signal is outputted, thereby limiting a torque of the motor.

Torque limiting device for motors in electically driven vehicles and

A magnet motor stator where a magnet of a pole of a stator includes multiple magnets. Each magnet can be flat and made from rare-earth materials. It is thus possible to manufacture these magnet motor stators at a lower cost accompanied by a reduction in size and weight for the magnet motor.

Magnet motor stator

An electrically assisted vehicle includes a vehicle main body having a driving wheel, a human drive system having a driving force applying part to which a human driving force for driving the driving wheel is applied and a torque detecting part for detecting the human driving force applied to the driving force applying part, and an electric drive system having a motor, a control part for controlling the motor and a battery for power supply, wherein the motor has an electric driving force characteristic such that it outputs the electric driving force only at speeds lower than a predetermined speed, and the control part of the electric drive system controls the motor with a predetermined ratio on the basis of detection results from the torque detecting part of the human drive systems thereby executing power assistance control while maintaining the assist ratio to be less than a predetermined value without providing a speed sensor for carrying out control based on the speed.

Growing community of inventors

Osaka, Japan

Yoshihiko Maeda