公开(公告)号：US20130114178A1

公开(公告)日：2013-05-09

申请号：US13662623

申请日：2012-10-29

Applicant: DENSO CORPORATION

Inventor： RYO ADACHI ,  Akito Itou ,  Katsumi Matsuo ,  Tsuneyoshi Isozaki

IPC: H01H47/22

CPC classification number: H01H47/325

Abstract: A relay drive unit drives a relay by supplying a power source voltage from a battery. The relay drive unit includes a power source voltage detector, a drive signal generator, and a relay drive circuit. The power source voltage detector detects the power source voltage. The drive signal generator generates a PWM signal as a drive signal for maintaining the relay in an ON state. The PWM signal has a preset duty ratio according to a magnitude of the power source voltage detected by the power source voltage detector. The relay drive circuit turns a supply of the power source voltage from the battery on/off based on a duty ratio of the drive signal generated by the drive signal generator.

Abstract translation: 继电器驱动单元通过从电池提供电源电压来驱动继电器。 继电器驱动单元包括电源电压检测器，驱动信号发生器和继电器驱动电路。 电源电压检测器检测电源电压。 驱动信号发生器产生PWM信号作为用于将继电器维持在接通状态的驱动信号。 PWM信号根据由电源电压检测器检测的电源电压的大小具有预设占空比。 继电器驱动电路基于由驱动信号发生器产生的驱动信号的占空比来开启/关闭来自电池的电源电压的供给。