Method for determining a target volumetric flow rate for a coolant
AssigneeRobert Bosch GmbH
InventorJakob Mauer
Life of this patent
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Abstract
The invention relates to a method for determining a target volumetric flow rate (V) for a coolant that is conducted through a coolant path in order to cool a power converter, wherein: the temperature (TC) of a DC-link capacitor of the power converter and the temperature (TK) of the coolant are determined, and a value for the target volumetric flow rate (V) is determined on the basis of the temperature (TC) of the DC-link capacitor and the temperature (TK) of the coolant.
Claims8
A method for determining a target volumetric flow rate (V) for a coolant (180), which is conducted through a coolant path (164) to cool a power converter (110), the method comprising:
- determining a temperature (TC) of a DC-link capacitor (135) of the power converter (110) and a temperature (TK) of the coolant, and
- determining, via an electronic controller, a value for the target volumetric flow rate (V) based on the temperature (TC) of the DC-link capacitor and the temperature (TK) of the coolant, and
- wherein the value for the target volumetric flow rate (V) is determined based on a temperature difference (ΔT), between the temperature (TC) of the DC-link capacitor and the temperature (TK) of the coolant, and the temperature of the coolant (TK), and
- wherein at least one value of a current is determined in the power converter, and wherein based on the at least one value of the current, an intermediate value (VZ) for the target volumetric flow rate determined from the temperature (TC) of the DC-link capacitor and the temperature of the coolant (TK), is adapted via the electronic controller and used as the value for the target volumetric flow rate (V), and
- controlling flow of coolant, via a coolant pump (190), through the coolant path (164) at the target volumetric flow rate (V).
A non-transitory, computer-readable storage medium having instructions that when executed by a computer cause the computer to determine a target volumetric flow rate (V) for a coolant (180), which is conducted through a coolant path (164) to cool a power converter (110), by:
- determining a temperature (TC) of a DC-link capacitor (135) of the power converter (110) and a temperature (TK) of the coolant, and
- determining a value for the target volumetric flow rate (V) based on the temperature (TC) of the DC-link capacitor and the temperature (TK) of the coolant, and
- wherein the value for the target volumetric flow rate (V) is determined based on a temperature difference (ΔT), between the temperature (TC) of the DC-link capacitor and the temperature (TK) of the coolant, and the temperature of the coolant (TK), and
- wherein at least one value of a current is determined in the power converter, and wherein based on the at least one value of the current, an intermediate value (VZ) for the target volumetric flow rate determined from the temperature (TC) of the DC-link capacitor and the temperature of the coolant (TK), is adapted based on a characteristic map (K1) and used as the value for the target volumetric flow rate (V), and
- controlling flow of coolant, via a coolant pump (190), through the coolant path (164) at the target volumetric flow rate (V).
Dependencies are inferred from the claim text.