Tank circuit protected by undervoltage surges
An energy storage circuit and energy storage capacitor technology, which is applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve the problem of excessive current and energy storage capacitor Repeated charging and discharging to avoid damage and reduce impact
Active Publication Date: 2013-03-20
SHANGHAI AVIATION ELECTRIC
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[0004] The purpose of the present invention is to provide an energy storage circuit for undervoltage surge protection, which solves the problems of excessive current at the moment of power-on and repeated charging and discharging of the energy storage capacitor in the usual energy storage circuit scheme
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[0009] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0010] attached figure 1 It is a functional block diagram of the embodiment of the present invention. When the 28V DC power supply is normally powered, the electrical equipment works normally, and the energy storage capacitor in the energy storage circuit 1 is full of electric energy; when the 28V DC power supply loses power instantaneously, the The energy storage capacitor starts to release electric energy to the back-end electrical equipment 2, and when the 28V input voltage of the electrical equipment drops to 8V and lasts for 50ms, the electrical equipment should not stop working.
[0011] attached figure 2 It is a specific circuit block diagram of the present invention. The circuit diagram includes an energy storage capacitor C, which is used to store the electric energy provided by the external power supply. When the external power supply suddenly loses powe...
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The invention relates to a tank circuit protected by undervoltage surges. The tank circuit protected by the undervoltage surges comprises an energy-storage capacitor and is characterized in that a positive pole of the energy-storage capacitor is connected with a source electrode of a metal oxide semiconductor (MOS) tube, a drain electrode of the MOS tube is connected with a positive input end of an input power through charge resistance, and a grid electrode of the MOS tube is connected with a positive input end of the input power through drive resistance. A negative pole of the energy-storage capacitor is connected with a negative input end of the input power. The grid electrode of the MOS tube is connected with a positive pole of a voltage-regulator diode, and a negative pole of the voltage-regulator diode is connected with the source electrode of the MOS tube. The tank circuit protected by the undervoltage surges has the advantages that charge currents after being powered on in a flash can not go as far as to be too large, the damage of large currents to the energy-storage capacitor and other electron components can be avoided, the repeated charge-discharge phenomenon can not occur on the energy-storage capacitor when supply voltage shakes, and thus the influence on the service life of the energy-storage capacitor is reduced.
Description
technical field [0001] The invention relates to an energy storage circuit capable of satisfying the undervoltage surge protection specified in GJB181-1986, which can be applied to a DC power supply circuit that needs to meet the requirement for undervoltage surge protection specified in GJB181-1986. Background technique [0002] In GJB181-1986, the technical requirements for DC airborne electrical equipment include an undervoltage surge resistance requirement, that is, when the 28V input voltage of DC electrical equipment drops to 8V and lasts for 50ms, the electrical equipment should not be interrupted. Work. [0003] The usual solution for undervoltage surge protection is to place a large-capacity energy storage capacitor directly at the power input terminal. The disadvantage of this is that the current will be very large at the moment of power-on, and it is easy to damage the energy storage capacitor and other components; at the same time It will also cause unnecessa...
Claims
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Inventor 彭布坤
Owner SHANGHAI AVIATION ELECTRIC