CN2694607Y - Power supply adapter for stationary stations - Google Patents
Power supply adapter for stationary stations Download PDFInfo
- Publication number
- CN2694607Y CN2694607Y CN 200420008662 CN200420008662U CN2694607Y CN 2694607 Y CN2694607 Y CN 2694607Y CN 200420008662 CN200420008662 CN 200420008662 CN 200420008662 U CN200420008662 U CN 200420008662U CN 2694607 Y CN2694607 Y CN 2694607Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- adapter
- direct current
- line
- supply adaptor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a power supply adapter for stationary stations. A rectifier diode is connected with a junior of the adapter to convert input single-phase alternating current to direct current, and the rectifier diode forms a half-wave rectification structure at the junior of the adapter. The utility model also discloses another power supply adapter for stationary stations. A rectifier diode is connected with a junior of the adapter, and the rectifier diode forms a full-wave rectification structure to convert input single-phase alternating current to direct current. A capacitor is connected between a zero line (N-line) of the junior of the adapter and a negative pole, which is output by a secondary in direct current. The utility model can greatly weaken alternating current voices which are formed in a phone connecting with stationary stations, so as to improve quality of speech and raise satisfaction degree of users.
Description
Technical field
The utility model relates to power supply adaptor, relates in particular to the power supply adaptor that is used for fixing platform.
Background technology
Fixed station in the communication system generally all disposes external power supply power supply, by power supply adaptor (ADAPTER) alternating current of importing is converted to direct current.
Consult shown in Figure 1ly, the power supply adaptor of fixed station configuration comprises a transformer, by rectifying tube the alternating current of input is converted to direct current at first group of transformer.Existing power supply adaptor generally all adopts the mode of full-wave rectification, and circuit structure is the structure of inverse-excitation type, and primary input terminal is not protected ground (PGND), has only live wire (L line), zero line (N line).
Owing to adopt the mode of full-wave rectification, the primary two ends can produce half voltage of input AC over the ground, this voltage can be by transformer the electric capacity of primary and secondary connection or transformer itself be capacitively coupled to dc output end, thereby the direct current that causes exporting has one tens volts alternating voltage for the PGND of elementary input, produce in the phone receiver that the existence of this alternating voltage can cause fixed station to connect hum, thereby influence speech quality.
The utility model content
In view of this, the utility model provides a kind of power supply adaptor that is used for fixing platform, with solve existing power supply adaptor because of the phone that can cause in use being connected with fixed station produce hum influence the problem of speech quality.
For addressing the above problem, the utility model provides following technical scheme:
A kind of power supply adaptor that is used for fixing platform at the elementary rectifying tube that is connected with of this adapter, is used for the single-phase alternating current of input is converted to direct current, and wherein, described rectifying tube is in the elementary formation halfwave rectifier structure of adapter.
Described rectifying tube is two, is serially connected in two elementary inputs of adapter respectively.Described rectifying tube is a rectifier diode.
A kind of power supply adaptor that is used for fixing platform, at the elementary rectifying tube that is connected with of this adapter, described rectifying tube constitutes the full-wave rectification structure, is used for the single-phase alternating current of input is converted to direct current; Wherein, also be connected with electric capacity between the negative pole of zero line of described primary (N line) and secondary direct current output.
Described electric capacity is Y electric capacity.
The utility model is by adopting halfwave rectifier or at the alternating voltage that increases between input and the output between the protection ground that electric capacity significantly reduces the direct current of output and input in power supply adaptor; make with phone that fixed station is connected in the hum that produces just can weaken greatly; thereby can improve the speech quality that the user uses, improve user's user satisfaction.
Description of drawings
Fig. 1 is the circuit theory diagrams of power supply adaptor of the prior art;
Fig. 2 is the circuit theory diagrams of the utility model embodiment one;
Fig. 3 is the circuit theory diagrams of the utility model embodiment two.
Embodiment
Embodiment one
Consult shown in Figure 2ly, the power supply adaptor that is used for fixing platform comprises transformer, the transformer secondary output output DC, and its circuit structure is same as the prior art.Two elementary inputs of adapter are respectively live wire (L line) and zero line (N line), are used for being connected with single phase alternating current power supply.Be serially connected with rectifier diode D1 and rectifier diode D2 on L line and N line respectively, rectifier diode D1, D2 form the halfwave rectifier mode.
By revising the rectifier system of input; be modified to the rectifier system of half-wave by the rectifier system of all-wave; the correct connection of L line, N line of input; the direct current of output is very low for voltage between the protection ground (PGND) of input; even when L line, N line are anti-inserted, the voltage between output and the PGND does not exceed the mode of all-wave yet.Because the L line and the voltage between the PGND of input are higher, and the voltage between N line and the PGND is very low, like this, adopt the mode of full-wave rectification, two ends in primary are alternately connected with the L line, cause the elementary two ends of transformer that PGND is had higher voltage, this voltage is coupled to the secondary of transformer by electric capacity (in esse electric capacity or spuious electric capacity), cause producing between the direct current exported and the PGND and compare higher voltage, adopt the mode of halfwave rectifier, the elementary of transformer has only an end and L line to connect, an end in addition and N line are connected, primary is just smaller to the voltage of PGND, and under same capacitive conditions, primary is coupled to secondary voltage and just reduces a lot like this, therefore, can effectively reduce the alternating voltage of the direct current of output, thereby can effectively improve the hum of fixed station phone, improve speech quality for PGND.
Embodiment two
Consult shown in Figure 3ly, be used for fixing the power supply adaptor of platform, two elementary inputs of adapter are respectively live wire (L line) and zero line (N line), are used for being connected with single phase alternating current power supply.Elementaryly be connected with four rectifier diodes, these four rectifier diodes carry out full-wave rectification, the transformer secondary output output DC to the alternating current of input.Between elementary N line and secondary direct current output negative pole, be connected with Y electric capacity.Because the voltage between N line and the PGND is very little, by the effect of this Y electric capacity, the dc terminal that can make output reduces greatly for the voltage of PGND.
Because Y electric capacity can effectively reduce the alternating voltage of the direct current of output for PGND, thereby can effectively improve the hum of fixed station phone, improve speech quality.
Claims (5)
1, a kind of power supply adaptor that is used for fixing platform at the elementary rectifying tube that is connected with of this adapter, is used for the single-phase alternating current of input is converted to direct current, it is characterized in that described rectifying tube is in the elementary formation halfwave rectifier structure of adapter.
2, power supply adaptor as claimed in claim 1 is characterized in that, described rectifying tube is two, is serially connected in two elementary inputs of adapter respectively.
3, power supply adaptor as claimed in claim 1 or 2 is characterized in that, described rectifying tube is a rectifier diode.
4, a kind of power supply adaptor that is used for fixing platform, at the elementary rectifying tube that is connected with of this adapter, described rectifying tube constitutes the full-wave rectification structure, is used for the single-phase alternating current of input is converted to direct current; It is characterized in that, also be connected with electric capacity between the negative pole of zero line (N line) that described adapter is elementary and the output of secondary direct current.
5, power supply adaptor as claimed in claim 4 is characterized in that, described electric capacity is Y electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420008662 CN2694607Y (en) | 2004-03-23 | 2004-03-23 | Power supply adapter for stationary stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420008662 CN2694607Y (en) | 2004-03-23 | 2004-03-23 | Power supply adapter for stationary stations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2694607Y true CN2694607Y (en) | 2005-04-20 |
Family
ID=34768133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420008662 Expired - Lifetime CN2694607Y (en) | 2004-03-23 | 2004-03-23 | Power supply adapter for stationary stations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2694607Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795110A (en) * | 2014-01-21 | 2014-05-14 | 超威电源有限公司 | Gel battery charging adapter |
-
2004
- 2004-03-23 CN CN 200420008662 patent/CN2694607Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795110A (en) * | 2014-01-21 | 2014-05-14 | 超威电源有限公司 | Gel battery charging adapter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140323 Granted publication date: 20050420 |