Controllable silicon multi-standby voltage switched control circuit

Abstract

The invention relates to a controllable silicon multi-standby voltage switched control circuit. The controllable silicon multi-standby voltage switched control circuit comprises a first controllable silicon control circuit module for external output, a second controllable silicon control circuit module for external output, a first control isolation relay, a second control isolation relay and an ICU detection circuit. Two controllable silicon control circuit modules are respectively connected with two control isolation relays, so that a control signal is provided; the ICU detection circuit is respectively connected with two control isolation relays, so that an alternative delay control signal is provided; and the output ends of the first controllable silicon control circuit module and the second controllable silicon control circuit module and the input ends of the first control isolation relay and the second control isolation relay are connected at the same joint. According to the controllable silicon multi-standby voltage switched control circuit disclosed by the invention, ordered working of a power supply is realized by utilizing the working relationship of voltage difference; isolation control is carried out by utilizing a signal type relay; and, whatever output conversion controllable silicon is switched from low voltage to high voltage or from high voltage to voltage, another controllable silicon cannot be in an instant conduction state.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a control circuit for multi-standby voltage switching of a thyristor. Background technique [0002] Today's thyristor characteristics still have some additional conditions for shutting off. This characteristic of thyristors limits high-frequency switching. Some traditional electrical control cabinets use relays or contactors for switching, and relays or contacts The movable contact and the static contact of the device will flash over when there is a large current contact, which is not suitable for frequent work. The other is to use a solid state relay instead of a relay or contactor. Although the problem of flashover of the contact is solved, it cannot When a device (such as UPS) needs to switch its original A power supply to B power supply or C power supply to obtain a different voltage power supply within a short period of 100mS, and this type of solid state relay ...

AI Technical Summary

Problems solved by technology

[0002] Today's thyristor characteristics still have some additional conditions for shutting off. This characteristic of thyristors limits high-frequency switching. Some traditional electrical control cabinets use relays or contactors for switching, and relays or contacts The movable contact and the static contact of the device will flash over when there is a large current contact, which is not suitable for frequent work. The other is to use a solid state relay instead of a relay or contactor. Although the problem of flashover of the contact is solved, it cannot When a device (such as UPS) needs to switch its original A power supply to B power supply or C power supply to obtain a different voltage power supply within a short period of 100mS, and this type of solid state relay is actually a thyristor inside. , and the turn-off characteristics of thyristors limit the application in this type of electrical equipment, such as some aging power supply control cabinets used for life cycle acceleration tests and high-current electrical equipment that require rapid switching

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