Inverter system for vehicle

Abstract

An inverter system for a vehicle includes an energy storage device configured to store the electrical energy, a first inverter including a plurality of first switching elements and configured to convert the electrical energy stored in the energy storage device into the alternating-current (AC) electric power, a second inverter including a plurality of second switching elements different from the plurality of first switching elements, a motor configured to be driven by receiving the AC power converted by the first inverter and the second inverter, current sensors disposed between the first inverter and the motor and between the second inverters and the motor, respectively, and configured to detect a current input to the motor, and a controller configured to generate a pulse width modulation(PWM) signal for controlling the driving of the motor.

Description

technical field [0001] The present disclosure relates to an inverter system for a vehicle, and more particularly, to an inverter system for a vehicle capable of improving efficiency and output by driving an inverter according to a required output amount of the vehicle and This allows the vehicle to be driven according to the limp home mode in the event of an inverter failure. Background technique [0002] Recently, as a response to air pollution and oil depletion crises, technologies related to environment-friendly vehicles using electric energy as vehicle power are actively being developed. Environmentally friendly vehicles include hybrid electric vehicles, fuel cell electric vehicles, electric vehicles, and the like. [0003] refer to figure 1 , in a conventional vehicle inverter system for outputting high output, a motor is driven by connecting a plurality of switching elements S1 to S6 in parallel for high output. However, in a conventional inverter system, a high out...

AI Technical Summary

Problems solved by technology

However, in a conventional inverter system, a high output can be obtained by connecting a plurality of switching elements in parallel to the motor, but in a fuel-economy driving mode in which the required output of the motor is relatively low, excessive switching elements occur. Switching loss and conduction loss make there is a limitation that the fuel efficiency of the vehicle decreases overall

In addition, in conventional inverter systems for vehicles, there is a limitation that limp home driving is not acceptable when there is a fault such as a disconnection between the motor and the inverter

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