Start-up circuit of high-voltage power supply

Abstract

The invention, which belongs to the electronic technology field, relates to a start-up circuit of a high-voltage power supply. The circuit is characterized in that: a BR1 input terminal is connected with an output terminal x of a TA and a leading out terminal p of a J 1-2D of a J1; a BR1 output terminal voltage passes through C1, same-phase input terminal R3, VZ1, R4 and then is applied to a U1 input terminal; a collector of a U1 output terminal is connected with a of a U2 and is also connected with a control power supply Vcc through a R5; an emitting electrode of the U1 output terminal and the Vcc are in ground connection; a reversed-phase input terminal of the U2 and the Vcc are in ground connection through a R7 and the reversed-phase input terminal of the U2 is connected with a contactJ1-1D through a R6; a contact J1-1 is connected with the Vcc; anodes of a VD2 and a VD3 are connected through a R1 and a base of a V1; the Vcc is connected with the anodes of the VD2 and the VD3 through a R8; a VD2 cathode is connected with a U2 output terminal; and a VD3 cathode is connected with an output terminal Vcon of a high-voltage power supply control unit, wherein the output terminal Vcon is used for outputting a control signal. Beneficial effects of the start-up circuit provided in the invention are as follows: the start-up circuit is simple and reliable; costs are low; and the design and the manufacture are convenient.

Description

technical field [0001] The invention belongs to the field of electronic technology, and relates to a power starting circuit, in particular to a high-voltage power starting circuit applied to a voltage regulating form of an auto-coupling voltage regulator. Background technique [0002] High-voltage power supply has important applications in many fields. According to the needs of safety and application objects, it is often required (for example, when conducting insulation tests on related materials) that the high-voltage power supply has a "return to zero start" function, that is, the output voltage is required to be stable after the high-voltage power supply is started. Zero or very low, and then gradually increase the voltage according to the test requirements. [0003] At present, based on considerations of application, cost, reliability, etc., many high-voltage power supplies still use auto-voltage regulators for voltage regulation. In order to realize the function of ret...

AI Technical Summary

Problems solved by technology

Although this method can realize the zero-return start function of the high-voltage power supply, it is inconvenient in practice because the designer needs to install a mechanical travel switch or a button switch on the auto-coupling voltage regulator. The size, shape and structure of the controller and the internal layout of the high-voltage power supply controller are often restricted by factors such as fixing methods and spatial locations.

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