Inverter circuit for vehicles
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsJeong Yun Lee, Sung Kyu Kim, Jae Won Lee, Tae Hwan Chung, Ki Young Jang, Jung Hong Joo
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Abstract
The present invention provides an inverter circuit for a vehicle, which includes: a switching unit that includes a plurality of switching elements and switches a direct current into an alternating current; and a variable clamping unit that clamps an overshoot in case the overshoot is generated, and stops the operation of the switching unit in case a system voltage is greater than a clamping breakdown voltage. The circuit enables a voltage (DC input voltage) greater than a breakdown voltage of clamping unit to be used as a system voltage.
Claims9
An inverter circuit for a vehicle, comprising:
- a switching unit that includes a plurality of switching elements and switches a direct current into an alternating current;
- and
- a variable clamping unit including a clamping unit which turns the plurality of switching elements on to clamp an overshoot, and a variable admittance which turns the switching unit off when a system voltage input to the switching unit is greater than a clamping breakdown voltage,
- wherein the variable admittance includes the capacitor that is charged by current which flows from the clamping unit, and the resistance that is connected in parallel with the capacitor.
A vehicle, comprising:
- a switching unit that includes a plurality of switching elements and switches a direct current into an alternating current;
- a variable clamping unit including a clamping unit and a variable admittance;
- and
- a motor unit that is operated by an output of the switching unit,
- wherein the clamping unit turns the plurality of switching elements on to clamp an overshoot, and the variable admittance that turns the switching element off when a system voltage input to the switching unit is greater than a clamping breakdown voltage due to counter electro-motive force of the motor unit.
Dependencies are inferred from the claim text.