Ablerex Electronics Co., Ltd.

I-shou University

Yi-Hao Chang

Jia-Min Shen

Chia-Hung Lee

Kuo-Liang Lin

Tai-Hsi Wu

Chi-Sheng Wang

A rapid cutoff device includes a thyristor AC switch for supplying an AC current from a first AC circuit to a second AC circuit. A serially-connected circuit of a first switch and a first capacitor parallel-connects with the first AC circuit. A serially-connected circuit of a second switch and a second capacitor parallel-connects with the second AC circuit. When cutting off the thyristor AC switch, the first switch is operated to conduct the first capacitor in a first direction for the AC current charging to the first capacitor, alternatively, the second switch is operated to conduct the second capacitor in a second direction for the AC current charging to the second capacitor, thereby lowering a current in the thyristor AC switch approaching a zero value and thus rapidly cutting off it.

Rapid cutoff device and operation method for SCR AC switches

A rapid cutoff device includes a thyristor DC switch, a switch and a capacitor. An operation method includes: connecting the thyristor DC switch between a first DC circuit and a second DC circuit; serially connecting the switch and the capacitor which further parallel connects the first DC circuit; when the thyristor DC switch is conducted, supplying a DC current via the thyristor DC switch; when a drive signal of the thyristor DC switch stops, operating the switch to conduct the capacitor which is charged by the first DC circuit to rapidly lower a current of the thyristor DC switch approaching a zero value, thereby rapidly cutting of the thyristor DC switch.

Rapid cutoff device and operation method for SCR DC switches

A heat ventilating chair includes a backrest unit, a seat unit, and a connecting unit connecting the backrest unit to the seat unit. One of the backrest unit and the seat unit includes a hollow member having an air pump, a pressure valve, and a channel that communicates fluidly the air pump and the pressure valve. The connecting unit is connected between the air pump and the other one of the backrest unit and the seat unit. The connecting unit drives the air pump to expel hot air in the channel to the ambient via the pressure valve when the backrest unit is forced to incline rearward. The connecting unit drives the air pump to draw ambient cool air into the channel via the pressure valve when the backrest unit is restored from a rearwardly inclined state.

Growing community of inventors

Kaohsiung, Taiwan

Yi-Hao Chang