US 12,111,193 B2
Method for determining a target volumetric flow rate for a coolant
Jakob Mauer, Sachsenheim (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/770,791
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Sep. 23, 2020, PCT No. PCT/EP2020/076534
§ 371(c)(1), (2) Date Apr. 21, 2022,
PCT Pub. No. WO2021/078457, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 10 2019 216 218.5 (DE), filed on Oct. 22, 2019.
Prior Publication US 2022/0373374 A1, Nov. 24, 2022
Int. Cl. G01F 1/68 (2006.01); H05K 7/20 (2006.01)
CPC G01F 1/68 (2013.01) [H05K 7/20927 (2013.01); H05K 7/20945 (2013.01)] 8 Claims
OG exemplary drawing
 
1. 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).