Driving device for switching element and power conversion system
AssigneeDenso Corporation
InventorTomotaka Suzuki
Life of this patent
Estimating the term…
Abstract
In a driving device, a resistor is provided on a current path connected to an on-off control terminal of a switching element. The current path permits a drive current to flow therethrough to or from the on-off control terminal of the switching element. A switching rate setter sets a switching rate of switching the switching element from one of an on state and an off state to the other thereof. A current adjusting unit includes an open-close control element provided on the current path for electrically opening or closing the current path. The current adjusting unit is configured to adjust, according to the switching rate set by the switching rate setter, the drive current flowing through the current path and the resistor while closing the open-close control element.
Claims16
A driving device for turning on or off, in response to a command signal, a switching element having an input terminal, an output terminal, and an on-off control terminal, the driving device comprising:
- a resistor provided on a current path connected to the on-off control terminal of the switching element, the current path permitting a drive current to flow therethrough to or from the on-off control terminal of the switching element;
- a switching rate setter configured to set a switching rate of switching the switching element from one of an on state and an off state to the other thereof;
- and
- a current adjusting means connected to a predetermined terminal provided on the current path, the current adjusting means comprising an open-close control element provided on the current path for electrically opening or closing the current path, the current adjusting means being configured to adjust, according to the switching rate set by the switching rate setter, a voltage applied to the predetermined terminal to thereby change the drive current having a variable non-zero value and flowing through the current path and the resistor while closing the open-close control element.
A power conversion system for converting input power into output power, the power converter comprising:
- an upper-arm switching element having an input terminal, an output terminal, and an on-off control terminal,
- a lower-arm switching element having an input terminal, an output terminal, and an on-off control terminal and connected in series to the upper-arm switching element, and
- drive units provided for the respective upper- and lower-arm switching elements, each of the drive units being configured to turn on or off, in response to a command signal, a corresponding one of the upper- and lower-arm switching elements, each of the drive units comprising:
- a resistor provided on a current path connected to the on-off control terminal of a corresponding one of the upper- and lower-arm switching elements, the current path permitting a drive current to flow therethrough to or from the on-off control terminal of a corresponding one of the upper- and lower-arm switching elements;
- a switching rate setter configured to set a switching rate of switching a corresponding one of the upper- and lower-arm switching elements from one of an on state and an off state to the other thereof;
- and
- a current adjusting means connected to a predetermined terminal provided on the current path, the current adjusting means comprising an open-close control element provided on the current path for electrically opening or closing the current path, the current adjusting means being configured to adjust, according to the switching rate set by the switching rate setter, a voltage applied to the predetermined terminal to thereby change the drive current having a variable non-zero value and flowing through the current path and the resistor while closing the open-close control element.
Dependencies are inferred from the claim text.