Sony Corporation

Nidec Tosok Corporation

Nidec Powertrain Systems Corporation

Yasuhiro Shirai

Taku Sugawara

Toshihiro Morita

Susumu Morita

Shin Ogata

Kei Sato

Yuichi Hibi

Yoshiyuki Kobayashi

Koji Higuchi

Tadayuki Hatsuda

Masaya Furushou

A control device for a three-phase motor includes a drive circuit that converts DC power supply voltage into three-phase AC voltage and supplies the three-phase AC voltage to the three-phase motor, a first voltage detection unit that detects terminal voltage of three phases of the three-phase motor, and a control unit that detects a point at which a first voltage value, which is a detection value of the terminal voltage, intersects a predetermined zero-cross determination level as a zero-cross point, and controls the drive circuit based on a detection result of the zero-cross point. The control unit corrects the first voltage value by multiplying the first voltage value by a first coefficient inversely proportional to an output duty ratio with respect to the three-phase motor in a case where the output duty ratio is equal to or less than a predetermined threshold.

Motor control device and electric pump device

One aspect of a motor control device of the present invention is a motor control device that controls a three-phase motor, the motor control device including a drive circuit that converts DC power supply voltage into three-phase AC voltage and supplies the three-phase AC voltage to the three-phase motor, a voltage detection unit that detects terminal voltage of three phases of the three-phase motor, and a control unit that detects a point at which induced voltage appearing in each terminal voltage of the three phases intersects a predetermined zero-cross determination level as a zero-cross point, and controls the drive circuit based on a detection result of the zero-cross point. The control unit changes a value of the zero-cross determination level when the induced voltage of at least one of the three phases increases and when the induced voltage of at least one of the three phases decreases.

One aspect of a motor control device according to the present invention is a motor control device that controls a motor of an electric pump. The motor control device includes a drive unit that supplies a drive current to the motor; a control unit that controls a rotation speed of the motor by controlling the drive unit based on a rotation speed command value; and a current detection unit that detects the drive current supplied to the motor, and supplies a current detection value indicating a detection result of the drive current to the control unit. The control unit determines whether or not a foreign fluid suction abnormality occurs in the electric pump, based on a first current detection value acquired at a first timing when the rotation speed command value changes from a first command value to a second command value and a second current detection value acquired after the first timing.

A control device for a motor unit provided in a vehicle is disclosed. The motor unit includes a motor including multiple coils provided side by side around a motor axis; a transmission mechanism transmitting power of the motor to an axle; a housing housing the motor and the transmission mechanism; an electric oil pump delivering oil stored in the housing; and a coil temperature sensor detecting a temperature of the coil. The control device includes a motor controller driving and controlling the motor; and a pump controller driving and controlling the electric oil pump. The pump controller estimates an oil temperature according to an ambient temperature and the temperature of the coil, and determines a start timing of the electric oil pump based on an estimated oil temperature.

Control device for motor unit

A motor driving device for driving a motor is provided. The motor driving device includes: a driver outputting a drive signal for driving the motor to the motor; and a controller controlling a duty ratio of the drive signal based on three control parameters which are an initial duty ratio, a duty ratio increasing speed, and a target duty ratio. The controller has a normal control mode in which each of the three control parameters is a predetermined value, and a cryogenic control mode in which at least one of the three control parameters is a smaller value than in the normal control mode.

Motor driving device and electric oil pump device

A controller of a motor control device increases a voltage to be applied to a coil based on a control signal calculated from an estimated rotation speed, when the estimated rotation speed becomes equal to or lower than a predetermined rotation speed, increases the voltage to be applied to the coil based on a control signal calculated from an actual rotation speed, in a case where the actual rotation speed is lower than the predetermined rotation speed when the estimated rotation speed becomes higher than the predetermined rotation speed, and decreases the voltage to be applied to the coil based on a control signal calculated from the actual rotation speed, in a case where the actual rotation speed is higher than the predetermined rotation speed when the estimated rotation speed becomes higher than the predetermined rotation speed.

Control device, control method, motor, and electric oil pump

A control device is provided for controlling a rotation speed of an electric oil pump, including a motor and a pump mechanism connected to the motor, based on a command value input from a host device. The control device includes: a first calculator calculating a first duty value of current to be output to the motor based on a deviation between the command value and a rotation speed of the motor; a second calculator calculating a second duty value of current to be output to the motor based on a deviation between a current limit value of the motor and a current value of the motor; and a drive current determiner comparing the first duty value calculated by the first calculator and the second duty value calculated by the second calculator, and selecting the lower duty value as a duty value of current that drives the motor.

Control device of electric oil pump and electric oil pump

A control device to control a motor includes a stator including a coil, a rotor including a permanent magnet, a detector that detects a rotational position of the rotor at every predetermined angle and outputs a position signal indicating the detected rotational position, and a controller that receives the position signal output by the detector and adjusts a duty ratio of a driving signal of the rotor by a pulse width modulation scheme based on the received position signal to control rotation of the rotor. The controller raises the duty ratio from a first duty ratio, starting from a point in time at which the position signal is received, and returns the raised duty ratio to the first duty ratio when a next position signal has been received.

An information processing device includes: a storage unit; a first display control unit; and a demanding unit. The storage unit that stores attribute data representing specified attribute of contents and category data representing a category of the attribute correlated to each other. The first display control unit that provides controls for displaying information for a selected attribute and for displaying, in a categorized state, information for related attributes correlated to the same category as that of the attribute on a correlation display screen. The demanding unit that demands data search by referring to the correlated attribute selected corresponding to information selected from among those displayed on the correlation display screen to an information provision device.

Information processing device, information processing method, and program for the same

An information processing apparatus that performs processing for editing information on contents includes: an acquisition means for acquiring attribute data classification information in which a plurality of attribute data indicating predetermined attributes of contents is correlated with category data indicating categories for classifying the plurality of attributes; a selection means for selecting predetermined attribute data from the attribute data included in the attribute data classification information acquired by the acquisition means; and a correlation means for newly correlating the attribute data selected by the selection means with category data other than the category data, which is correlated in the attribute data classification information acquired by the acquisition means, in response to a user's instruction.

Correlating categories of attributes of contents with classification elements

An information processing apparatus that controls reproduction of contents includes: a first storage means for storing contents and attribute data indicating predetermined attributes of the contents so as to correspond to each other; a second storage means for storing association among the attribute data; and a selection means for selecting a second content to be reproduced subsequent to a first content which is being reproduced or whose reproduction has been instructed. The selection means selects, as the second content, a content having attribute data that is stored in the second storage means so as to be associated with the attribute data of the first content.

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Kanagawa, Japan

Yasuhiro Shirai