Inverter control system
AssigneesKia Motors Corporation, Hyundai Motor Company
InventorsJeongbin Yim, Daewoong Han, Gu Bae Kang, Byungsoon Min
Life of this patent
Estimating the term…
Abstract
An inverter control apparatus is provided that offers a ‘soft turn off’ to a gate operation of the inverter so as to securely protect the IGBT. In particular, an inverter control system according to the present invention may include a gate operating portion that controls turn on/off of an IGBT and forcibly turns off the IGBT if a short circuit or an over current is detected from the IGBT, a current buffer that amplifies a control current for the turn on/off of the IGBT that is outputted from the gate operating portion, and a filter that delays the forcible turn off control current that is outputted from the gate operating portion.
Claims15
An inverter control system, comprising:
- a gate operating portion that controls turn on/off of an IGBT and forcibly turns off the IGBT, if a short circuit or an over current is detected from the IGBT;
- a current buffer configured to amplify a control current for the turn on/off of the IGBT that is outputted from the gate operating portion;
- a filter configured to delay the forcible turn off control current that is outputted from the gate operating portion.
An inverter control system, comprising:
- a gate operating portion that controls turn on/off of an IGBT and turns off the IGBT if a short circuit or over current detected from the IGBT;
- a current buffer configured to amplify turn on/off control current of the IGBT outputted from the gate operating portion;
- a filter resistance configured to form a separate line for directly supplying a forcible turn-off control current of the IGBT outputted from the gate operating portion with a gate terminal of the IGBT such that the forcible turn-off control current of the IGBT is not supplied to the current buffer.
An inverter control system, comprising:
- a gate operating portion that controls a turn on/off of an IGBT and forcibly turns off the IGBT if a short circuit or over current is detected from the IGBT;
- a first transistor and a second transistor that are configured so as to switch according to an on/off control current outputted from the gate operating portion to amplify a control current supplied to a gate terminal of the IGBT;
- and
- a filter resistance in connection with a base terminal and an emitter terminal of the first transistor and the second transistor to form a separate line through which a forcible turn-off control current of the IGBT is directly transferred to a gate of the IGBT, such that a forcible turn-off control current of the IGBT cannot be supplied to a base of the first transistor and the second transistor.
An inverter control system, comprising:
- a gate operating portion that controls a turn on/off of an IGBT and turns off the IGBT forcibly if a short circuit or over current is detected from the IGBT;
- a first transistor and a second transistor that are configured so as to switch according to an on/off control current outputted from the gate operating portion to amplify a control current supplied to a gate terminal of the IGBT;
- a first resistance in connection with a base terminal of the first transistor to adjust a switching slope;
- a second resistance in connection with a base terminal of the second transistor to adjust a switching slope;
- a third resistance that is coupled with the second resistance in series, and is connected to a base terminal and an emitter terminal of the second transistor to form a separate line through which the forcible turn-off control current of the IGBT is direct supplied to a gate of the IGBT, such that the forcible turn-off control current of the IGBT is not supplied to a base of the second transistor.
Dependencies are inferred from the claim text.