Rotating electrical machine cooling system
AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha
InventorsTomohiko Miyamoto, Kenjiro Nagata
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Abstract
A rotating electrical machine cooling system includes a cooling structure for a rotating electrical machine that is mounted on a hybrid vehicle, and a controller. The cooling structure includes a coolant discharge channel and a coolant supply channel through which a coolant is circulated between an oil pump unit and the interior of a case body that includes the rotating electrical machine therein. The cooling structure further includes a bypass flow channel that connects the oil pump unit and the interior of the case body with each other, and a relief valve that is provided in the bypass flow channel. The oil pump unit includes a mechanical oil pump and an electric oil pump.
Claims3
A rotating electrical machine cooling system comprising:
- a motive power unit that includes an internal combustion engine and a rotating electrical machine;
- a coolant reservoir in which a coolant for cooling the rotating electrical machine is stored;
- a mechanical coolant pump that is driven by the internal combustion engine, sucks the coolant from the coolant reservoir, and discharges the coolant to a main discharge flow channel via a first check valve to supply the coolant to the rotating electrical machine;
- an electric coolant pump that sucks the coolant from the coolant reservoir, is connected to the main discharge flow channel via a second check valve in parallel with the mechanical coolant pump, and discharges the coolant from a discharge port of the electric coolant pump to supply the coolant to the rotating electrical machine;
- a bypass flow channel that branches off from a flow channel between the discharge port of the electric coolant pump and the second check valve, to supply the coolant to the rotating electrical machine;
- and
- a relief valve that is provided in the bypass flow channel and opens at a predetermined relief pressure.
Dependencies are inferred from the claim text.