Mitsuba Corporation

Toyota Jidosha Kabushiki Kaisha

Shinji Shibuya

Tomohiro Chimbe

Masahiro Fueki

Masaki Ishizeki

Tamotsu Iwazaki

Guodong Tan

Shigeyuki Enkaku

Miya Yamada

Yoichi Shindo

Ken Yamamoto

Nobuyasu Sadakata

Tomoo Iijima

Toshiaki Isomura

Ken Hirota

Toru Someya

Kenji Kamio

Atsushi Takahashi

Masahiro Ishijima

Yuzuru Masuyama

Taiki Ishida

Sadami Hino

An electric oil pump for automobile transmission clutch engagement includes: a temperature sensor that measures a temperature of oil supplied to an oil supply destination relating to clutch engagement of an automobile transmission; an oil pump drive motor; a current determination part that determines a current value output to the oil pump drive motor to a predetermined current value determined such that the oil pump drive motor is capable of being driven without stopping in a case where the temperature is equal to or less than a predetermined temperature at which a torque of the oil pump drive motor becomes smaller than a load of the oil pump drive motor; and an oil pump that supplies oil to the oil supply destination by the oil pump drive motor being driven based on the determined current value.

Electric oil pump for automobile transmission clutch engagement, electric oil pump control method for automobile transmission clutch engagement, vehicle, and vehicle electric oil pump for automobile transmission clutch engagement

A control device of a vehicle, the vehicle includes an engine, a hydraulic clutch disposed on a power transmission path between the engine and driving wheels, a starter motor for use in startup of the engine, an electric oil pump device discharging hydraulic oil generating oil pressure supplied to the clutch, and a power supply device supplying electric power driving each of the starter motor and the electric oil pump device. The control device includes a startup control unit that performs starter startup control of starting discharge of the hydraulic oil by the electric oil pump device after determining that output voltage of the power supply device or input voltage of the electric oil pump device is higher than or equal to a fixed voltage after completion of cranking by the starter motor upon startup of the engine using the starter motor.

Control device of vehicle

This electric motor includes: a brushless motor (); and a control device () that is coupled integrally to an end of a motor case () in an axial direction. The control device () includes: a bus bar unit main body () that has a base unit () with a plurality of bus bars wired thereinside and has a connector unit () provided integrally on the base unit () and led out to an outside of a housing (); a motor drive unit () that drives the brushless motor (); and a motor control unit () that controls the motor drive unit (). The motor drive unit () is attached to a first main surface () of the base unit () while the motor control unit () is attached to a second main surface () of the base unit ().

Electric motor and electric pump

A driving apparatus including an inverter unit for energizing the coil by switching ON and OFF of the switching element, an energization pattern determination unit for selecting a plurality of energization patterns, each of which indicates a direction of a current that flows through the coil, one by one when driving of a motor is started, and energizing the coil by switching ON and OFF of the switching element based on a selected energization pattern at a duty ratio corresponding to a value of a maximum current capable of being supplied by the power supply apparatus, a current applied time measurement unit for measuring an energization time, which is a time until a value of the current flowing through the coil reaches a predetermined target current value for each energization pattern, and a rotor stop position estimation unit for estimating a position at which the rotor stops.

Driving apparatus and stop position detection method

A brushless motor control apparatus includes a mask processing unit to which digital induced voltage signal is input, a energizing current timing generation processing unit, a pulse width detection unit, and an advance angle correction unit for performing advance angle correction. The pulse width detection unit measures pulse width of spike voltage, and the advance angle correction unit calculates the correction to the advance angle according to the length of this pulse width. The energizing current timing generation processing unit takes half the value obtained after subtracting the correction value from the edge interval of the position detection signal generated in the mask processing unit as the advance angle.

Brushless motor control apparatus and control method and motor system

When starting a brushless motor, if the stop position of the rotor is detected between time tand time t, a start-up excitation pattern in accordance with the rotor stop position is input for an initial energization time Ts. Afterward, when the energization is stopped, a plurality of signals SL, SL, SL, SLare generated in sequence in excitation switch timing signals in accordance with the rotational position of the coasting rotor. From these signals SLto SL, the rotor position is detected using the second and subsequent signals SLto SLand then the process shifts to ordinary energization switch control. In accordance with the present invention, it is possible to start up a motor in a short time with a simple method so as to obtain a large torque during start-up.

Brushless motor driving device, brushless motor starting method, and method of detecting rotor stop position of brushless motor

Growing community of inventors

Kiryu, Japan

Shinji Shibuya