Electrified vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHiroaki Toyoda
Life of this patent
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Abstract
An electrified vehicle includes: an energy storage device; a traction motor including a three-phase open-end winding; a first inverter including a first upper arm and a first lower arm and connected to a first end of the three-phase open-end winding; a second inverter including a second upper arm and a second lower arm and connected to a second end of the three-phase open-end winding; a switch provided between the first and second inverters; and a controller configured to control the first and second inverters and the switch. When the controller confirms that the absolute value of a zero-sequence current is equal to or larger than a threshold while the switch is on and the first and second inverters are being driven to perform switching, the controller determines that the switch has failed open.
Claims3
An electrified vehicle including
- an energy storage device,
- a traction motor including a three-phase open-end winding,
- a first inverter including a first upper arm and a first lower arm, the first inverter being connected to a power line to which the energy storage device is connected, and being connected to a first end of the three-phase open-end winding,
- a second inverter including a second upper arm and a second lower arm, the second inverter being connected to the power line at a position on an opposite side of the first inverter from the energy storage device, and being connected to a second end of the three-phase open-end winding,
- a switch provided on the power line at a position between the first inverter and the second inverter, and
- a controller configured to control the first inverter, the second inverter, and the switch,
- wherein the controller is configured to determine that the switch has failed open, when the controller confirms that an absolute value of a zero-sequence current is equal to or greater than a threshold while the switch is on and the first inverter and the second inverter are being driven to perform switching, the zero-sequence current being a sum of phase currents of three phases.
Dependencies are inferred from the claim text.