Residual voltage bleeder apparatus

Abstract

The invention discloses a residual voltage bleeder apparatus, and relates to the electrical field. The apparatus comprises a commercial power input line, a lightning protection circuit, an EMI rectification filter circuit, a switching transformer conversion circuit, a secondary side rectification filter circuit, a feedback voltage stabilization output circuit, and a residual voltage discharging circuit, wherein the commercial power input line and the lightning protection circuit are connected with the EMI rectification filter circuit; one path of the EMI rectification filter circuit is connected with the switch transformer conversion circuit, and the other path of the EMI rectification filter circuit is connected with the residual voltage bleeder circuit; one path of the switch transformerconverter circuit is in bidirectional connection with the residual voltage bleeder circuit, and the other path of the switch transformer converter circuit is connected with the secondary rectification output circuit; the secondary rectification output circuit is connected with the feedback voltage stabilization output circuit, and the feedback voltage stabilization output circuit is connected with the residual voltage bleeder circuit, so the residual voltage of the bleeder equipment can be thoroughly bleeded, the power consumption of the electrical equipment is not influenced, high-voltage impact between a live wire and a zero wire of the electrical equipment can be borne, and the risk of resistor damage is avoided.

Description

technical field

[0001] The invention relates to the electrical field, in particular to a residual voltage discharge device. Background technique

[0002] Since the current national standard has made it clear that electrical products must comply with EMC international standards, it is necessary to take anti-interference measures for electrical products.

[0003] Common mode inductors, X capacitors, Y capacitors and other devices are added to the control circuit to form a filter circuit, which realizes the international EMC standard and meets the requirements of the national standard. However, these three components in the filter circuit are also the main devices that generate residual voltage; for the sake of safe electricity use, measures to eliminate residual voltage are required. The residual voltage discharge equipment sold in the market generally solves the residual voltage by adding additional discharge resistors or other discharge loads, so that the energy stored in t...

Examples

Embodiment Construction

[0021] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0022] like figure 1 As shown, the residual voltage discharge device provided by the embodiment of the present invention includes a mains input line, a lightning protection circuit, an EMI rectification filter circuit, a switching transformer conversion circuit, a secondary side rectification filter circuit, a feedback stabilized output circuit, and a residual voltage Bleeder circuit, where:

[0023] Mains input line and lightning protection circuit are respectively connected with EMI rectification filter circuit;

[0024] One of the EMI rectification and filtering circuits is connected to the switching transformer conversion circuit, and the other is connected to the residual voltage discharge circuit;

[0025] One path of the switching transformer converter circuit is bidirectionally connected to the residual voltage discharge circuit...

technical field

[0001] The invention relates to the electrical field, in particular to a residual voltage discharge device. Background technique

[0002] Since the current national standard has made it clear that electrical products must comply with EMC international standards, it is necessary to take anti-interference measures for electrical products.

[0003] Common mode inductors, X capacitors, Y capacitors and other devices are added to the control circuit to form a filter circuit, which realizes the international EMC standard and meets the requirements of the national standard. However, these three components in the filter circuit are also the main devices that generate residual voltage; for the sake of safe electricity use, measures to eliminate residual voltage are required. The residual voltage discharge equipment sold in the market generally solves the residual voltage by adding additional discharge resistors or other discharge loads, so that the energy stored in t...

Examples

Embodiment Construction

[0021] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0022] like figure 1 As shown, the residual voltage discharge device provided by the embodiment of the present invention includes a mains input line, a lightning protection circuit, an EMI rectification filter circuit, a switching transformer conversion circuit, a secondary side rectification filter circuit, a feedback stabilized output circuit, and a residual voltage Bleeder circuit, where:

[0023] Mains input line and lightning protection circuit are respectively connected with EMI rectification filter circuit;

[0024] One of the EMI rectification and filtering circuits is connected to the switching transformer conversion circuit, and the other is connected to the residual voltage discharge circuit;

[0025] One path of the switching transformer converter circuit is bidirectionally connected to the residual voltage discharge circuit...

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