CN2151468Y

CN2151468Y - AC/DC Loader

Info

Publication number: CN2151468Y
Application number: CN 93205293
Authority: CN
Inventors: 张廷鹏
Original assignee: QIAOXING TELECOMMUNICATION EQUIPMENTS FACTORY HANGZHOU CITY
Current assignee: QIAOXING TELECOMMUNICATION EQUIPMENTS FACTORY HANGZHOU CITY
Priority date: 1993-03-02
Filing date: 1993-03-02
Publication date: 1993-12-29
Anticipated expiration: 2003-03-02

Abstract

The utility model relates to a power artificial load for testing the load capacity of the power units of a rectifier, a power supply transformer, a storage battery, a generator set, etc., belonging to a test device for the power supply. The utility model is composed of a switch, an adjustable load resistance and a box body. The key point of the utility model is that the whole load resistance is divided into three parts by two separated switches (K, K). One end of each of the three parts of the load resistance connected with the two separated switches is connected with a wire connecting terminal of the corresponding input power supply. Thus the utility model can be used as the artificial load with the double-purpose of direct current and three-phase alternating current, having the advantages of convenience and safety.

Description

AC/DC Loader

The utility model is a kind of power supply fictitious load that is used to test the load capacity of power-supply devices such as rectifier, transducer, accumulator and genset, belongs to power supply test equipment.

In the past, all made fictitious load usually, not only instability but also dangerous with water resistance.In recent years, though the DC load case occurred, can only test direct current, and can not use for AC power.

The purpose of this utility model just is to provide a kind of fictitious load that both can make direct supply, can make the fictitious load of AC power again, the load box of a tractor serves several purposes.

The utility model is made up of switch, tunable load resistance and casing, its tunable load resistance is made up of the resistor that is no less than three, the Yi Duan And of these resistors is connected on the connection terminal of input power supply, the other end then joins by the other connection terminal of switch with the input power supply, its key is that whole pull-up resistor is separated into three parts by two separation switches, and the end that this three fractional loads resistance and two separation switches join respectively is connected to the connection terminal of corresponding input power supply.

Fig. 1 is a schematic diagram of the present utility model, and 1 is tunable load resistance, it by two separate K switch ' and K " be separated into three parts (11,12 and 13).(K ' and K ") when closing becomes the DC load case, and at this moment power supply is connected on terminals M, the N, K switch when two separation switches ₁, K ₂And K ₃Be used for the size of regulating load.If K switch ' and K " disconnect, then this load box can be used as the load of three-phase alternating-current supply, and at this moment the three-way of three-phase supply is connected on respectively on connection terminal A, B and the C.If want regulating load, then each fractional load also can be made up of many resistors.

This shows that the utility model both can be used as the DC simulation load, can be used as the three-phase alternating current fictitious load again, both reached the purpose of a tractor serves several purposes, accomplished stable, safety, reliable again.

Fig. 2 is an embodiment electrical schematic diagram of the present utility model.Tunable load resistance 1 (is respectively R by 9 resistors of making of resistance wire ₁, R ₂R ₉) form, the Yi Duan And of these resistors is connected on the power supply terminal N, and the other end then passes through K switch respectively ₁, K ₂K ₉Join with the other connection terminal of input power supply: be used as the DC load time spent, two separate K switch ' and K " (making the combined switch of interlock) closes, and at this moment can join (can certainly be more) by 9 electricity resistance And at most.When being used as the three-phase alternating-current supply load, then with two separate K switch ' and K " disconnect; at this moment tunable load resistance 1 is divided into three parts; each is made up of every part three resistors; generally this resistance of three ones is identical or approaching (certainly as if having special requirement also can difference), and at this moment three-phase supply is connected on terminal A, B, the C.For the ease of using, at the AC/DC voltage table 2 that this supply voltage that also measurement is housed and is tried is used, its gauge outfit V is by switch S ₁Conversion, gauge outfit V links to each other with power supply input wires terminal M, N when surveying DC voltage.When test cross stream voltage, then link to each other with the output terminal (P, Q) of rectification circuit Z.The input end of rectification circuit 2 is then by switch S ₂Conversion, both can join with input terminal M, N, also can join with the sub-A of three-phase power input end, B.If certainly need not be as the fictitious load of single phase alternating current power supply, switch S then ₂Can cancel and directly and A, B join.

Claims

1, a kind of AC/DC load box, by switch, tunable load resistance and casing are formed, its tunable load resistance is formed by being no less than three resistors, the Yi Duan And of these resistors is connected on the connection terminal of input power supply, the other end then joins by the other connection terminal of switch with the input power supply, it is characterized in that tunable load resistance (1) by two separation switches (K ', K ") is separated into three parts (11; 12 and 13), and this three fractional loads resistance (11; 12 and 13) and two separation switches (K '; K ") end that the joins connection terminal that respectively is connected to corresponding input power supply (is respectively A, B, C).

2, AC/DC load box as claimed in claim 1 is characterized in that the resistance of three fractional load resistance (11,12 and 13) is identical or approaching, and And and each are made up of more than one resistor, two separate K switch ' with K " be to link combined switch.

3, AC/DC load box as claimed in claim 1 or 2, it is characterized in that having one and measure the AC/DC voltage table (2) that input supply voltage is used, its gauge outfit (V) both can link to each other with direct-flow input end (M, N) by switch S, also can link to each other with the output terminal (P, Q) of rectification circuit (Z), the input end of rectifier circuit (Z) is then by switch S ₂Conversion, both can join with power input terminal M, N, also can join with the sub-A of three-phase power input end, B.