Special power adapter for loudspeaker

Abstract

The invention discloses a special power adapter for a loudspeaker. The power adapter comprises two connecting covers; the two connecting covers are detachably connected; protective devices are arranged on one sides of the two connecting covers; transformers are mounted in the two connecting covers; capacitors are arranged on one sides of the transformers; one sides of the transformers are connected with a neutral wire and a live wire; the other sides of the transformers are connected with a power wire; one sides of the capacitors are connected with a first ground wire; and the other sides of the capacitors are connected with a second ground wire. According to the special power adapter, the problem that a grounding loop of a wireless microphone to a power supply can only form a power loop through other equipment in a loudspeaker system can be avoided; the capacitive reactance of the grounding loop is reduced, so that when the power supply is converted into audio information, the influence on the frequency response characteristics of loudspeaker equipment is avoided; the occurrence possibility of noises can be effectively reduced, so that the audition enjoyment is improved; good protection performance is achieved; disassembly and maintenance are facilitated; and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of power adapters, in particular to a special power adapter for audio. Background technique [0002] The power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of housings, transformers, inductors, capacitors, control ICs, PCB boards and other components. Its working principle is converted from AC input to DC output; press the connection Ways can be divided into wall-mounted and desktop. It is widely used in security cameras, set-top boxes, routers, light bars, massagers, audio wireless microphones, karaoke machines and other equipment. [0003] International Electrical Safety Classification Standards: [0004] Class 0: This type of electrical appliance only requires the live parts to be isolated from the casing, and there is no grounding requirement. This type of electrical appliances is mainly used in places where peo...

AI Technical Summary

Problems solved by technology

[0007] Class 2: These appliances are double insulated or reinforced insulated and have no grounding requirements

[0009] According to the national standard, the low-power power adapter belongs to the second-class power supply and does not need to be connected to the safety ground wire. However, audio products have special requirements for sound. If the safety ground wire is not added, the grounding loop of the wireless microphone to the power supply can only pass through the audio system. Other equipment in the system forms a power loop, which greatly increases the capacitive reactance of the ground loop. Therefore, when the power is converted into audio information, it greatly affects the frequency response characteristics of the audio equipment and cannot provide users with good audio-visual enjoyment. , we propose a special power adapter for audio to solve the above problems

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