SYSTEM AND METHOD FOR SENSING AND CALIBRATING INVERTER VOLTAGE OF ELECTRIC VEHICLE

• Main Authors: LEE, JAE WON, JUNG, JIN HWAN, KIM, SUNG KYU, MOON, SANG HYEON, LEE, YOUNG KOOK, CHUNG, TAE HWAN, KIM, BUM SIK, KIM, CHUL WOO
• Format: Patent
• Language: English; Korean
• Published: 13.04.2011
• Subjects: ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PERFORMING OPERATIONS; PHYSICS; TESTING; TRANSPORTING; VEHICLES IN GENERAL

PURPOSE: A system and method for sensing and calibrating a voltage of an electric vehicle are provided to enable a CPU to obtain calibrating information using two point voltage values obtained by a variable gain amplifier, thereby accurately calibrating a sensing value. CONSTITUTION: A device for sensing and calibrating an inverter voltage includes a battery voltage sensor(12), an inverter voltage sensor(22), a battery controller(13), a variable gain amplifier(25), and a CPU(24). The CPU obtains calibrating information based on a voltage value outputted from the variable gain amplifier to calibrate an inverter sensing value. An amplification gain is changed into a desired value in the variable gain amplifier by a control signal.