Sanyo Denki Co., Ltd.

Yo Muramatsu

Takahisa Toda

Katsumichi Ishihara

Masahiro Koike

Hikaru Urushimoto

Toshiyuki Nakamura

Tomoaki Ikeda

Kenta Nishimaki

Noriaki Taniguchi

A measurement device includes: a casing that includes a first air duct with an air inlet; a straightening grid; a first chamber; an opening plate including an opening; a second chamber; pressure sensors configured to measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber; a specific opening configured to allow the opening plate to be replaceable; an open/close portion configured to open and close the specific opening; and a duct forming a second air duct between the measurement device and a measurement target.

Measurement device for measuring airflow volume and a ventilation resistance and having a specific opening for allowing an opening plate to be replaceable and differential pressure measurement arrangement

A measurement device for measuring an airflow volume of a wind-blowing apparatus includes, a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air, an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough, pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct, and an orifice provided on the opening member to change a size of the opening.

Measurement device having variable opening orifice for measuring airflow volume and ventilation resistance of wind blowing apparatus

A fan motor control unit includes sensor units that each detect a rotational position of the fan motor, a switching unit that selectively connects each of stator coils of the fan motor to a rectifier circuit, a current sensor that detects a current flowing in the fan motor, and a switching control unit that advances, in the case where the current detected by the current sensor exceeds a threshold, a energization timing from the rectifier circuit to the stator coils with respect to the energization timing applied while the current detected by the current sensor is lower than the threshold, on the basis of the rotational position detected by the sensor units.

Fan motor control unit

A measurement device for measuring an airflow volume and a ventilation resistance of a wind-blowing apparatus includes: a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air; an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough; pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct; and an opening member replacing mechanism that forms a part of the air duct, the opening member replacing mechanism being configured to allow the opening member to be replaceable.

Measurement device for measuring airflow volume and ventilation resistance of wind-blowing apparatus

A motor control device includes an energization pattern output portion and an inverter circuit. The energization pattern output portion cyclically outputs a plurality of energization patterns. The inverter circuit selectively connects respective coils provided in a motor to a rectifier circuit according to the output energization pattern. The energization pattern output portion delays the output timing of the energization pattern according to a rotation speed of the motor.

Motor control device and motor control method

A motor controller according to the invention includes a driving IC and a magnetic sensor. The driving IC receives a driving signal for driving a motor and controls the rotation speed of the motor using the driving signal. The magnetic sensor detects the rotation speed of the motor. The driving IC includes a sensor signal output terminal and a driving signal input terminal. The sensor signal output terminal outputs a sensor signal generated by the driving IC based on a pulse signal from the magnetic sensor. The driving signal input terminal receives the driving signal. The sensor signal output terminal and the driving signal input terminal are connected by a connecting portion. The driving IC rotates the motor at a first rotation speed different from the rotation speed of the motor driven according to the driving signal using the sensor signal input to the driving signal input terminal.

Motor controller

To provide a motor control device which can apply an electric brake to a motor when power supply is stopped, and achieve a miniaturization and a cost reduction. A first switchthrough a sixth switchconnects respective coils L, Land Lincluded in a motor to an electric power source. The capacitor C accumulates the power supplied from the electric power source. A seventh switchconnects the capacitor C to a fourth switchthrough the sixth switch, when the power supply from the electric power sourceis stopped. The operation of the seventh switchcauses the fourth switchthrough the sixth switchto operate by the power accumulated in the capacitor C, and respective coils Lto Lare short-circuited to apply the brake to the motor.

Growing community of inventors

Tokyo, Japan

Yo Muramatsu