Honda Motor Co., Ltd.

Yazaki Corporation

Shintaro Uchida

Yoshihiro Kawamura

Takafumi Tsurumi

Takayuki Yamamoto

Yusuke Tatara

Kimihiro Matsuura

Tetsu Sugiyama

Hidehiko Shimizu

Atsuhiro Naganuma

Taiki Iimura

Ritsuya Oshima

Hisayoshi Takahashi

Hiroshi IWakami

A wear computing system () for computing a wear of a wheel () of a vehicle () comprises a revolution sensor () configured to detect a number of revolutions of the wheel (), an acceleration sensor () configured to detect an acceleration of the vehicle () in a travel direction thereof, and a control unit () configured to compute a travel distance of the vehicle from the acceleration of the vehicle, and compute the wear from the travel distance and the number of revolutions of the wheel ().

Wheel wear computing system

A voltage detection apparatus includes a plurality of voltage detection units, each of which detects cell voltages of plural cells in each of blocks in a battery module. Each of blocks includes the plural cells connected in series. The plurality of voltage detection units are respectively supplied with power via power supply lines connected to the blocks. The plurality of voltage detection units are respectively provided with a plurality of current increase units for increasing dark currents so that the dark currents flowing through the power supply lines respectively become a same target value.

Voltage detection apparatus and method of reducing dispersion of dark currents

An insulation measurement apparatus includes a path including a first resistor, a capacitor electrically floated from a ground, and a second resistor between a positive to a negative electrode side of a power supply, a first switching element between the power supply positive electrode side and the capacitor, a second switching element between the capacitor and the power supply negative electrode side, a detection section detecting a charge voltage on the capacitor and determining a power supply insulation state, and a voltage setting section executing a power supply voltage measurement mode controlling the first and second switching elements to charge the capacitor for a predetermined time period, and an insulation voltage measurement mode charging a terminal of a positive or negative electrode side of the capacitor via a resistor between the power supply positive or negative electrode and the ground for a predetermined time period.

Insulation measurement apparatus

There is provided a discharge controller for a multiple cell battery that has a plurality of storage cells connected in series with each other. A discharge path from the storage cell is connected a load. The discharge controller includes: cell voltage detection units for detecting respective cell voltages of the storage cells; a switch group comprising a plurality of switches each connected between the storage cells; and a control unit for performing ON/OFF control on the respective switches individually in response to detection results detected by the cell voltage detection units so as to form the discharge path from the storage cell to the load.

Discharge controller

The present invention employed a motor control device including: current sensors which detect currents in each phase of a three-phase motor; a coordinate conversion device which computes a d-axis actual current and a q-axis actual current in dq-coordinates from phase currents of three phases based on detection values of the current sensors; a voltage instruction computation device which computes a d-axis voltage instruction and a q-axis voltage instruction based on a deviation between a d-axis current instruction and the d-axis actual current and on a deviation between a q-axis current instruction and the q-axis actual current; a target phase current computation device which computes target phase currents for each phase from the d-axis current instruction and the q-axis current instruction; and a current difference computation device which computes, for each phase, a current difference between the phase current and the target phase current.

Motor control device and motor control method

Growing community of inventors

Wako, Japan

Shintaro Uchida