TRACTION CONVERTER OF BUS VOLTAGE DETECTION CIRCUIT HAVING DOUBLE VOLTAGE SENSOR

摘要

A traction converter of a bus voltage detection circuit having double voltage sensors, the traction converter comprising a rectifying circuit (1), a bus voltage detection circuit (2) and an inverter circuit (3) connected in sequence; the rectifying circuit (1) comprises one or more four-quadrant rectifiers (11, 12) connected in parallel; the bus voltage detection circuit (2) is used to detect a bus voltage between a positive end (VDC+) and a negative end (VDC-) of a bus, and comprises a first voltage sensor (21) and a second voltage sensor (22) connected in parallel to the positive end (VDC+) and the negative end (VDC-) of the bus; the inverter circuit (3) comprises one or more inverters (31, 32) connected in parallel, and is used to drive and pull a motor to operate. Two parallel voltage sensors (21, 22) are disposed to detect a bus voltage, such that one of the voltage sensors (21, 22) serving in a redundancy configuration can detect the bus voltage when the other voltage sensor (21, 22) malfunctions, thus improving reliability; in addition, the two voltage sensors (21, 22) are combined to detect the bus voltage, thus having a better detection precision.