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    • 6. 发明授权
    • Switching current and a relay device employed therein
    • 开关电流和其中使用的继电器装置
    • US4855612A
    • 1989-08-08
    • US166301
    • 1988-03-10
    • Hirofumi KogaKatsumi Koyanagi
    • Hirofumi KogaKatsumi Koyanagi
    • H01H47/00H01H9/54
    • H01H9/542H01H2009/545Y10T307/76Y10T307/911Y10T307/918Y10T307/924Y10T307/944Y10T307/957
    • A switching circuit for supplying electric power to a load from a power source includes a first relay device having a first switch and a semiconductor switching element connected in series with the first switch, power source and load. A second relay device is provided which is defined by a second switch connected parallelly to the semiconductor switching element and an actuating switch for enabling and disabling the semiconductor switching element. The second relay device is so arranged as to effect the make of the actuating switch and second switch in said order and to effect the break of the same in the opposite order. A delay circuit is provided for controlling the first and second relay devices such that when supplying a current to the load, the first and second relay devices are turned on in said order so that the first switch, the actuating switch and the second switch are turned on in said order. And, when cutting off the current to the load, the first switch, the actuating switch and the second switch are turned off in the opposite order.
    • 用于从电源向负载供电的开关电路包括具有与第一开关,电源和负载串联连接的第一开关和半导体开关元件的第一继电器装置。 提供第二中继装置,其由与半导体开关元件并联连接的第二开关和用于启用和禁用半导体开关元件的致动开关限定。 第二继电器装置被布置成以所述顺序实现致动开关和第二开关的制造,并以相反的顺序实现其断开。 提供延迟电路用于控制第一和第二继电器装置,使得当向负载提供电流时,第一和第二继电器装置以所述顺序接通,使得第一开关,致动开关和第二开关被转动 按照顺序。 并且,当切断电流到负载时,第一开关,致动开关和第二开关以相反的顺序关闭。