Sanyo Denki Co., Ltd.

Takahisa Toda

Yo Muramatsu

Katsumichi Ishihara

Masahiro Koike

Jiro Watanabe

Tomoaki Ikeda

Hikaru Urushimoto

Haruhisa Maruyama

Tetsuya Yamazaki

Takashi Kaise

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 product specification setting apparatus includes: an electronic tag for updatably storing specifications of a product; and a control computer for controlling the product according to the stored specifications. A fan motor includes: a motor driving unit for driving a motor for rotating a fan; an electronic tag for updatably storing specifications of the fan motor; and a control computer for controlling the motor driving unit according to the stored specifications.

Product specification setting apparatus and fan motor having the same

A control device of a fan motor includes: a voltage sensor that detects a voltage applied to a fan motor; a switching portion that selectively connects to each of coils of the fan motor and a rectifier circuit; and a switching control portion that reduces a duty ratio of a driving pulse applied to the switching portion if the voltage detected by the voltage sensor exceeds a threshold.

Control device of fan motor

A motor controller that controls energization of a motor in which a plurality of coils Uto Wthat applies torque to a rotor is arranged in a circular pattern includes: a rotation speed detection sensor that detects a rotation speed of the motor; and an energization control unit that controls energization of the plurality of coils Uto Wusing the detected rotation speed. The energization control unit sequentially energizes the plurality of coils Uto Win all energization patterns if the detected rotation speed is outside of predetermined conditions and sequentially energizes the plurality of coils Uto Win remaining energization patterns (for example, U&#x2192;V phase, V&#x2192;W phase, V&#x2192;U phase, W&#x2192;U phase, and W&#x2192;V phase) excluding a partial energization pattern (for example, U&#x2192;W phase) of all energization patterns if the detected rotation speed is within the predetermined conditions.

Motor controller

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

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.

Motor control device and control method of the same

A cable is sandwiched between a first inner wall surface of a peripheral-wall-side pressing wall portion and a first inner wall surface of a cap-side pressing wall portion, between a second inner wall surface of the peripheral-wall-side pressing wall portion and a second wall surface of the cap-side pressing wall portion, and between a third inner wall surface of the peripheral-wall-side pressing wall portion and a third inner wall surface of the cap-side pressing wall portion to crank the cable to form a cranked portion of the cable. The peripheral-all-side pressing wall portion and the cap-side pressing wall portion sandwich the cranked portion therebetween. Thus, defective soldering may be prevented between a plurality of lead wires and a core-wire soldered portion to which core wires of the lead wires are soldered and connected.

Growing community of inventors

Tokyo, Japan

Takahisa Toda