公开(公告)号：KR1020020058746A

公开(公告)日：2002-07-12

申请号：KR1020000086876

申请日：2000-12-30

Applicant: 현대자동차주식회사

Inventor： 오종한

IPC: H02M3/155 ,  H02M1/32

Abstract: PURPOSE: Safety disconnection units by using a buck converter for an electric vehicle is provided to realize a free charge relay function and a main relay function by using a current control of the buck converter. CONSTITUTION: Safety disconnection units comprises an FET(22), a diode(23), an inductor(24), a capacitor(c), and a current controller(27). The FET receives a battery current as a source(21), and controls a drain current value according to the voltage level applied to a gate. The diode limits the output current of the drain terminal so as to flow the current in one direction. The inductor generates an induction magnetic flux according to the variation of output current of the drain terminal. The capacitor charges and discharges charges according to the current flow through the inductor. The current controller outputs a control signal for controlling the drain current by feedback detecting the current passed through the inductor so as to charge the voltage of the capacitor. In case the voltage of the capacitor is charged more over than the predetermined level, the current controller adjusts a duty ratio of the FET with 100% so as to correspond the battery voltage with the inverter(26) voltage.

Abstract translation: 目的：通过使用电动车辆的降压转换器提供安全断路装置，通过使用降压转换器的电流控制实现免费继电器功能和主继电器功能。 构成：安全断路单元包括FET（22），二极管（23），电感器（24），电容器（c）和电流控制器（27）。 FET接收电池电流作为源极（21），并且根据施加到栅极的电压电平来控制漏极电流值。 二极管限制漏极端子的输出电流，以使电流沿一个方向流动。 电感器根据漏极端子的输出电流的变化产生感应磁通量。 电容器根据通过电感器的电流进行充电和放电。 电流控制器通过反馈检测通过电感器的电流来输出用于控制漏极电流的控制信号，以便对电容器的电压进行充电。 在电容器的电压高于预定电平的情况下，电流控制器将100％的FET的占空比调整为使电池电压与逆变器（26）的电压相对应。