Cooling liquid flow estimation method and device and dual-motor control system

• Main Authors: XU BENBEN, CAO LIANG, BAO HUICHUANG
• Format: Patent
• Language: Chinese; English
• Published: 08.08.2023
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PERFORMING OPERATIONS; PRINTED CIRCUITS; TRANSPORTING; VEHICLES IN GENERAL

The invention provides a cooling liquid flow estimation method and device and a dual-motor control system, relates to the technical field of motor control, is applied to a dual-motor controller, and comprises the following steps: obtaining positions and temperatures of six reference points arranged corresponding to three-phase power modules in a cooling channel of the dual-motor controller, and obtaining loss under each power module; based on the temperature change rates and the corresponding losses of the first motor control three-phase power module and the second motor control three-phase power module, coolant flow estimation is conducted, and a first estimation value and a second estimation value are obtained; based on the first motor control three-phase power module, the second motor control three-phase power module, the total temperature variation of all the power modules and the corresponding loss, coolant flow estimation is conducted, and a third estimation value, a fourth estimation value and a fifth