CN2457639Y

CN2457639Y - High efficiency broad tuning DC voltage-stabilized source

Info

Publication number: CN2457639Y
Application number: CN 00260653
Authority: CN
Inventors: 张继春
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-11-29
Filing date: 2000-11-29
Publication date: 2001-10-31
Anticipated expiration: 2010-11-29

Abstract

The utility model relates to a high-efficiency broad regulating DC voltage-stabilized power source. One set of secondary poles of a transformer of the utility model is connected with a gear shifting circuit and the other set of secondary poles is connected with an auxiliary power supply. One end of the gear shifting circuit is connected with a gear shifting control circuit and the other end of the gear shifting circuit is connected with a rectifier. The output end of the rectifier is connected with the input end of a filter; the output end of the filter is connected with a source electrode of a power field effect transistor; a drain electrode of the power field effect transistor is connected with a dummy load and a sampling circuit, and a grid electrode of the power field effect transistor is connected with a comparison amplifying unit. One end of the comparing amplifying unit is connected with the sampling circuit and the other end is connected with the gear shifting control circuit and the auxiliary power supply; the gear shifting control circuit is connected with the drain electrode of the power field effect transistor.

Description

Efficient wide straightening stream stabilized voltage supply

The utility model relates to a kind of efficient wide straightening stream stabilized voltage supply.

Present used commodity D.C. regulated power supply, its outstanding shortcoming is exactly that efficient is low, thereby has wasted many electric energy and metal.

The purpose of this utility model provides a kind of improved Novel DC stabilized voltage supply.Because technical improvement has reduced the power consumption of the adjustment pipe that constitutes the main pressure regulator loop, and improves about 30% efficient, thereby saved electric energy greatly.Because electric energy has been saved, the natural heat dissipation device also reduces, thereby has reduced metal consumption.And adjustment pipe of the present utility model when parallel connection, need not the apolegamy, provide convenience to production, the reliability and the life-span of complete machine are greatly improved.

To achieve these goals, the utility model provides a kind of efficient wide straightening stream stabilized voltage supply, and it comprises transformer, shift circuit, gear shift control circuit and accessory power supply is characterized in that one group the utmost point of transformer is connected with shift circuit, and another group time utmost point is connected with accessory power supply; One end of shift circuit links to each other with the gear shift control circuit, and the other end links to each other with rectifier; The output terminal of rectifier is connected with the input end of wave filter; The output terminal of wave filter links to each other with the source electrode of power field effect pipe; The drain electrode of power field effect pipe links to each other with sample circuit with fictitious load, and the grid of power field effect pipe links to each other with the comparison amplifying unit; Relatively an end of amplifying unit links to each other with sample circuit, and the other end links to each other with accessory power supply with the gear shift control circuit; The gear shift control circuit is connected with drain electrode, sample circuit and the fictitious load of power field effect pipe respectively.Adjust pipe employing power field effect pipe and replace bipolar transistor, thereby simplified driving circuit has reduced power consumption, has improved fiduciary level, flowed easier realization as in parallel expansion of the power field effect pipe of adjusting pipe.

The tube voltage drop size of adjusting pipe is the principal element that influences overall efficiency.The utility model has been introduced low pressure reduction technology in order to reduce tube voltage drop, thereby tube voltage drop has been reduced about 3V than bipolar transistor, has further improved efficient.

Owing in the above-mentioned solution, improved and adjusted pipe, thereby whole aircraft reliability is improved, be convenient to produce, reduced power consumption; On the other hand, owing on circuit theory, adopted low pressure reduction technology, make the power supply overall efficiency that the raising of essence arranged.The raising of efficient has driven reducing of machine volume, and metal consumption is few, and cost is reduced, and has improved product competitiveness.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the theory diagram of efficient wide straightening stream stabilized voltage supply of the present utility model;

Fig. 2 is the circuit theory diagrams of efficient wide straightening stream stabilized voltage supply of the present utility model.

Among the figure, 1, transformer; 2, shift circuit; 3, rectifier; 4, wave filter; 5, power field effect pipe; 6, sample circuit; 7, compare amplifying unit; 8, accessory power supply; 9, gear shift control circuit; 10, fictitious load.

Fig. 1 is a principle of stabilized voltage block diagram of the present utility model.Transformer 1 is transformed to the interchange low-voltage with input ac voltage, delivers to shift circuit 2, and one road and gear shift control circuit 9 join, one the tunnel connects rectifier 3, AC low-tension is transformed to pulsating dc voltage, delivers to power field effect pipe 5 through wave filter 4, the drain D of power field effect pipe 5 is output U ₀, link to each other with sample circuit 6 with fictitious load 10.By output U ₀Fluctuation sampling, deliver to comparison amplifying unit 7, relatively an end of amplifying unit 7 links to each other with accessory power supply 8, the other end is connected to the grid g of power field effect pipe 5, thus the tube voltage drop of power controlling field effect transistor 5 adjustment self reaches the purpose of voltage-regulation voltage-stabilization.Shift circuit 2 makes output U ₀Expanded range does not make the power field effect pipe power consumption excessive again, and it realizes fluid drive by the gear shift control circuit 9 that joins, gear shift control circuit 9 also respectively with output U ₀Join with accessory power supply 8, accessory power supply 8 also links to each other with transformer 1.The voltage stabilizing process of circuit can be expressed as follows by flow process:

If output voltage U ₀Rise cause in the sample circuit 6 magnitude of voltage rise, so just make the grid g current potential of power field effect pipe 5 rise, this has caused current potential decline of the drain D of power field effect pipe 5 again, also is output voltage U ₀Descend, thereby stablized output voltage.

Vice versa.

Adjustment pipe of the present utility model adopts power field effect pipe MOSFET.The advantage of this scheme is not need at the control utmost point, and promptly grid g sets up driving circuit, thereby has simplified circuit greatly, and has reduced unnecessary loss thus, has increased the stability and the reliability of circuit working.And the important point to be that the common double gated transistors is difficult in parallel, bring certain difficulty for big electric current output.And power field effect pipe MOSFET is quite different, its in parallel being very easy to, and all pipes in parallel can be realized the automatic current equilibrium, and the functional reliability of circuit is greatly improved.Another one important improvement point of the present utility model is to have adopted low pressure reduction mu balanced circuit, when making the tube voltage drop of power field effect pipe MOSFET between drain D and source S almost near zero volt voltage, can also play the pressure regulation effect, than adopting bipolar transistor to raise the efficiency about 30%.The realization of this advantage is to adopt the output of the drain D of power field effect pipe MOSFET to realize.Another advantage of the utility model circuit is the startup difficult problem that does not have similar circuit.

Fig. 2 is an embodiment of the present utility model.Wherein transformer 1 is for having the transformer T of three utmost points; Shift circuit 2 is one group of contact J1-1 of relay J 1; Gear shift control circuit 9 is by operational amplifier IC1-2, resistance R 7, R8, R10, and triode Q and relay J 1 are formed; Rectifier 3 is bridge rectifier diode D1; Wave filter 4 is electrolytic condenser C1; Sample circuit 6 is made of resistance R 1; Relatively amplifying unit 7 is operational amplifier IC1-1; Fictitious load 10 is resistance R 9; Accessory power supply 8 is by bridge rectifier diode D2, D3, integrated regulator IC2, IC3, and capacitor C2, C3, C4, C5, resistance R 4, stabilivolt Z forms.Resistance R 2, R5 and R6 form adjustable reference, and to realize Adjustable Output Voltage, integrated regulator IC2 provides positive voltage of voltage regulation, and integrated regulator IC3 provides negative voltage of voltage regulation, to support the required normal working voltage of circuit.

Claims

1. an efficient wide straightening stream stabilized voltage supply comprises transformer, shift circuit, and gear shift control circuit and accessory power supply is characterized in that one group the utmost point of transformer is connected with shift circuit, another group time utmost point is connected with accessory power supply; One end of shift circuit links to each other with the gear shift control circuit, and the other end links to each other with rectifier; The output terminal of rectifier is connected with the input end of wave filter; The output terminal of wave filter links to each other with the source electrode of power field effect pipe; The drain electrode of power field effect pipe links to each other with sample circuit with fictitious load, and the grid of power field effect pipe links to each other with the comparison amplifying unit; Relatively an end of amplifying unit links to each other with sample circuit, and the other end links to each other with accessory power supply with the gear shift control circuit; The gear shift control circuit is connected with drain electrode, sample circuit and the fictitious load of power field effect pipe respectively.

2. efficient wide straightening stream stabilized voltage supply according to claim 1 is characterized in that described transformer is the transformer (T) with three utmost points; Shift circuit is one group of contact (J1-1) of relay (J1); The gear shift control circuit is by operational amplifier (IC1-2), resistance (R7, R8, R10), and triode (Q) and relay (J1) are formed; Rectifier is bridge rectifier diode (D1); Wave filter is electrolytic condenser (C1); Sample circuit is made of resistance (R1); Relatively amplifying unit is operational amplifier (IC1-1); Fictitious load is resistance (R9); Accessory power supply is by bridge rectifier diode (D2, D3), integrated regulator (IC2, IC3), and capacitor (C2, C3, C4, C5), resistance (R4), stabilivolt (Z) is formed.