Inverter device
AssigneeAisin Aw Co., Ltd.
InventorsShinsuke TSUBAMOTO, Isamu KATO
Life of this patent
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Abstract
An inverter device that includes an inverter circuit that converts power between DC power and multi-phase AC power; a drive circuit that transfers a drive signal to each of a plurality of switching elements that form the inverter circuit to cause a switching element of the plurality of switching elements to perform turn-on, in which the switching element is caused to transition from an off state to an on state, and turn-off, in which the switching element is caused to transition from the on state to the off state; and a current detection circuit that detects a current that flows through each of the plurality of switching elements.
Claims8
An inverter device comprising:
- an inverter circuit that converts power between DC power and multi-phase AC power;
- a drive circuit that transfers a drive signal to each of a plurality of switching elements that form the inverter circuit to cause a switching element of the plurality of switching elements to perform turn-on, in which the switching element is caused to transition from an off state to an on state, and turn-off, in which the switching element is caused to transition from the on state to the off state;
- and
- a current detection circuit that detects a current that flows through each of the plurality of switching elements, wherein:
- the drive circuit includes a soft turn-off circuit that causes the switching element to perform the turn-off by transferring the drive signal via a delay resistor in the case where the current which is detected by the current detection circuit is equal to or more than an overcurrent threshold prescribed in advance;
- and
- the soft turn-off circuit includes a capacitor connected in parallel with the delay resistor.
Dependencies are inferred from the claim text.