Patent ID: 8912691
Filing Date: 2014-12-16
Classification: B60K,F16K,F28D,Y10T

Abstract:
1. 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.