HEV/PHEV 2 ANGLE ESTIMATION METHOD OF TWO MOTOR SYSTEM FOR HEV/PHEV

• Main Authors: KIM YOUNG UN, LIM JAE SANG
• Format: Patent
• Language: English; Korean
• Published: 04.06.2020
• 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; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

The present invention relates to an angle estimation method of a two-motor system for HEV/PHEV, and more specifically, to an angle estimation method that can improve an error of an estimated angle by using synchronization of PWM on/off of a resolver output signal and a peak value according to PWM. According to the present invention, an angle estimation method of a two-motor system for HEV/PHEV, which estimates an angle by using a resolver to which a first motor and a second motor are applied, includes: a first step of selecting an estimated angle of a motor for turning off PWM control when an inverter providing driving power to the first and second motors turns on/off the PWM control of a resolver output signal; and a second step of determining whether a peak timing of the resolver output signal and a PWM time point of the inverter are synchronized when the PWM control of the resolver output signal is turned on, and selecting an estimated angle of the unsynchronized motor. According to the present invention having the configuration as described above, the noise of the resolver can be reduced, so that vehicle NVH is improved, motor overcurrent may is prevented, parts are prevented from being damaged. In addition, the present invention can be applied to an existing vehicle only by changing SW without a change in H/W, so that additional cost is not incurred. 본 발명은, HEV/PHEV 2모터 시스템의 각도 추정 방법에 관한 것으로서, 특히 레졸버 출력신호의 PWM on/off와 PWM에 따른 피크값의 동기화를 이용하여 추정 각도의 오차를 개선하는 각도 추정 방법에 관한 것이다. 본 발명은 제1모터 및 제2모터가 적용된 레졸버를 사용하여 각도를 추정하는 HEV/PHEV 2모터 시스템의 각도 추정 방법에 있어서, 제1모터 및 제2모터로 구동 전력을 제공하는 인버터가 레졸버 출력신호의 PWM 제어를 on/off 하는 경우 PWM 제어를 off하는 모터의 추정 각도를 선택하는 제1단계; 및 레졸버 출력신호의 PWM 제어가 on되는 경우 레졸버 출력신호의 피크 시점과 인버터의 PWM 시점이 동기화 되는지 판단하여 비동기화 되는 모터의 추정 각도를 선택하는 제2단계;를 포함할 수 있다. 전술한 바와 같은 구성을 갖는 본 발명에 따르면, 레졸버의 노이즈를 줄여 결과적으로 차량 NVH 개선, 모터 과전류 방지, 부품 소손 방지하고, H/W 변경 없이 SW 변경만으로 적용이 가능하여 추가 비용이 발생하지 않고, 기존 차량에 적용이 가능한 이점이 있다.