An inverter is a device that converts direct current (DC) supplied by a battery into alternating current (AC). The motor of an electric vehicle (EV) is driven by this AC power. To improve the overall energy efficiency of an EV, it is crucial to minimize the energy loss of the inverter.
What is an Inverter?
Overview of Inverters
An inverter in an electric vehicle is responsible for converting the direct current (DC) supplied by the battery into alternating current (AC). This is necessary because most traction motors installed in EVs operate on AC power. The output power of the inverter is set according to the output power of the motor (ranging from 30 kW to 400 kW, etc.).
Typically, an EV is equipped with one or two inverters. However, in the case of in-wheel motor systems (where each wheel is driven by an individual motor), each motor requires its own inverter.
Types of Motors
Motors are mainly categorized into two types: brushed motors and brushless motors.
Market Trends and Device Development
As the number of electric vehicles increases, the demand for inverters will also grow. Additionally, with the trend of improving vehicle performance, motors are being designed for higher power output, necessitating inverters with higher power capacity.
The electronic components that make up inverters are expected to meet certain requirements in the future, including:
Key Requirements for Future Inverters
Circuit Configuration of an Inverter
Overall Structure
An inverter consists of the following circuits:
The role of an inverter is to convert the DC power supplied by the battery into AC power. As the production of electric vehicles increases, the number of inverters installed is also expected to rise. There is a growing demand for high-output inverters, while miniaturization remains a key challenge. The electronic components used in inverters must support "higher power capacity," "better heat resistance," and "smaller size and lighter weight."
R&D center: Headquarters Dongguan
Manufacturing center: Susong, Anqing, Anhui