<span>The insulated gate bipolar transistors (IGBTs) are widely used in various applications as they require low gate drive power and gate voltage. This paper proposes an active gain circuit to maintain voltage stability of series-connected IGBTs for high voltage applications. The novel gate driver circuit with closed-loops control amplifies the gate signal while restricting the IGBT emitter voltage below a predetermined level. With the proposed circuit, serial-connected IGBTs can replace high-voltage IGBTs (HV-IGBTs) for high-voltage applications through the active control of the gate signal time delay. Closed-loop controls function is to charged current to the gate to restrict the IGBT emitter voltage to a predetermined level. This paper also presents the experiment on the gate driver capability based on a series-connected IGBTs with three IGBTs and a snubber circuit. The experimental results show a voltage offset with active control with a wide variation in load and imbalance conditions. Lastly, the experimental results are validated with the simulation results, where the simulation results agree with the experimental results.</span>
Batteries are the primary energy storage for electric vehicles. Often the power of the battery cannot be adequate to satisfy the demands of heavy loads. Simultaneously with the battery source, secondary capacity, such as a super-capacitor, can be used to fulfil the power demand where ultra-capacitors meet the high-frequency specifications. Ultracapacitor can be used to inhibit the recycling of the high-current transient battery. In the course of the battery recycling impacts battery life, charging device with high current. This paper is focused on a PI control system for electric vehicle management and the selected MATLAB / Simulink simulation framework. The result from the energy management system that is using shows that with PI controller, the voltage and current more stable compared to the design without using PI controller.
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