Arrangement for the liquid cooling of an electric motor generator unit
First Claim
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1. A liquid cooling system, comprising:
- an electric motor generator unit including a stator and a rotor;
an air gap for cooling the electric motor generator unit, the air gap defined between the stator and the rotor, where the air gap is configured to receive a cooling liquid supplied from a source located outside of the electric motor generator unit;
a temperature sensor for detecting an operating temperature variable; and
a control device operably controlling a pressure or flow of the supplied cooling liquid from the source as a function of a determined actual value of the operating temperature variable of the electric motor generator unit;
wherein the control device operably limits the flow of the supplied cooling liquid based on at least one of a lower and an upper limiting flow value, the at least one of the lower and the upper limiting flow value being based on the actual value of the operating temperature variable; and
wherein the control device operably determines, based on the actual value of the operating temperature variable, that the viscosity of the cooling liquid has changed, and the control device, in response, operably adjusts the at least one of the lower and the upper limiting flow value.
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Abstract
A system is provided for liquid cooling of an electric motor generator unit. The electric motor generator unit includes a magnetic air gap running between a stator and a rotor, wherein for the cooling of the electric motor generator unit, the air gap is acted on with cooling liquid supplied from the outside. A control device adapts the pressure or the volume flow of the supplied cooling liquid as a function of a determined actual value of an operating temperature variable of the electric motor generator unit.
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14 Claims
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1. A liquid cooling system, comprising:
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an electric motor generator unit including a stator and a rotor; an air gap for cooling the electric motor generator unit, the air gap defined between the stator and the rotor, where the air gap is configured to receive a cooling liquid supplied from a source located outside of the electric motor generator unit; a temperature sensor for detecting an operating temperature variable; and a control device operably controlling a pressure or flow of the supplied cooling liquid from the source as a function of a determined actual value of the operating temperature variable of the electric motor generator unit; wherein the control device operably limits the flow of the supplied cooling liquid based on at least one of a lower and an upper limiting flow value, the at least one of the lower and the upper limiting flow value being based on the actual value of the operating temperature variable; and wherein the control device operably determines, based on the actual value of the operating temperature variable, that the viscosity of the cooling liquid has changed, and the control device, in response, operably adjusts the at least one of the lower and the upper limiting flow value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A liquid cooling system, comprising:
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an electric motor generator unit including a stator and a rotor; an air gap for cooling the electric motor generator unit, the air gap defined between the stator and the rotor, where the air gap is configured to receive a cooling liquid supplied from a source located outside of the electric motor generator unit; a temperature sensor for detecting an operating temperature variable; and a control device operably controlling a pressure of the supplied cooling liquid from the source as a function of a determined actual value of the operating temperature variable of the electric motor generator unit; wherein the control device operably limits the pressure of the supplied cooling liquid based on at least one of a lower and an upper limiting pressure value, the at least one of the lower and the upper limiting pressure value being based on the actual value of the operating temperature variable; and wherein the control device operably determines, based on the actual value of the operating temperature variable, that the viscosity of the cooling liquid has changed, and the control device, in response, operably adjusts the at least one of the lower and the upper limiting pressure value, so as to compensate for the viscosity change. - View Dependent Claims (11, 12, 13, 14)
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Specification