Search International and National Patent Collections

1. (WO2018161833) SEMI-CONTROLLED DEVICE DRIVE THROTTLING DEVICE

Pub. No.:    WO/2018/161833    International Application No.:    PCT/CN2018/077707
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Fri Mar 02 00:59:59 CET 2018
IPC: H03K 17/60
Applicants: GUANGZHOU KINGSER ELECTRONICS CO., LTD
广州市金矢电子有限公司
Inventors: GUO, Qiaoshi
郭桥石
Title: SEMI-CONTROLLED DEVICE DRIVE THROTTLING DEVICE
Abstract:
Provided is a semi-controlled device (S1) drive throttling device, which is suitable to be used in a semi-controlled device (S1) drive circuit and which comprises: a first capacitor (C1), a first semiconductor switch (Q1), a discharge switch (A) and a voltage detection unit (B). The voltage detection unit (B) is connected to both ends of the semi-controlled device (S1) to be driven. An output signal of the voltage detection unit (B) is transmitted through the first capacitor (C1) to the control terminal of the first semiconductor switch (Q1). The discharge switch (A) is connected to the first capacitor (C1) for discharging the first capacitor (C1). The first semiconductor switch (Q1) is connected in series in the drive circuit of the semi-controlled device (S1). The driving signal of the semi-controlled device (S1) is in turn connected to a control electrode of the semi-controlled device (S1) through the first semiconductor switch (Q1). The first semiconductor switch (Q1) is turned on when the potential difference between the two ends of the semi-controlled device (S1) is less than an on-state voltage of the semi-controlled device (S1). The first semiconductor switch (Q1) is turned off after the semi-controlled device (S1) is turned on. The device has the advantages of no control blind area or minimal control blind area and good throttling effect.