Abstract
Most solenoid valves in use today require a magnetic coil to be continuously energized to maintain the magnetization of the magnetic body in order to operate. The problem is that if the power is still supplied, the power consumption will continue. In addition, problems such as shortening the lifespan of solenoid valve internal parts due to the increase in the internal temperature of the electronic stability control (ESC) due to the continuous heating of the magnetic coil, and malfunction due to instantaneous power failure may occur. In this study, we conducted a study on the permanent magnet traction control valve (TCV) for ESC that can minimize the unnecessary power consumption of electric vehicle batteries. For optimal permanent magnet design, polarity direction setting and permanent magnet specifications were studied through FE simulation. A permanent magnet TCV was fabricated and an electromagnetic force test was conducted to compare and evaluate it with the FE simulation result. By using a permanent magnet, it was possible to lower the initial current value for the TCV to drive, therefore, it was possible to develop a permanent magnet TCV that can minimize the unnecessary power consumption of electric vehicle batteries.
Highlights
The automobile industry is rapidly changing from an internal combustion engine vehicle to an electric vehicle
The traction control valve (TCV) for electronic stability control (ESC), an active safety system component for electric vehicles, was designed and manufactured as a component that minimizes the use of batteries
If the auto-hold function is used for 2 h a day while driving an electric vehicle, the power consumption is about 82.3Wh
Summary
The automobile industry is rapidly changing from an internal combustion engine vehicle to an electric vehicle. When the power supply is interrupted, the magnetic material is demagnetized At this time, the plunger opens the flow path of the sol-seat by pushing the armature upward by the reaction force applied. If the auto-hold function is used for 2 h a day while driving an electric vehicle, the power consumption is about 82.3Wh. The heat generated by the magnetic coil rises up to a maximum of 200 ◦C, which in turn raises the temperature inside the ECU up to a maximum of 150 ◦C in order to prevent the temperature rise of the magnetic coil, the initial current is lowered to 1.5 A after applying 3.4 A to prevent the temperature rise of the magnetic coil. If the reliability margin is set to 20%, the electromagnetic force required for the TCV is determined to be 3.2N by Equation (1)
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