CN201611451U

CN201611451U - Intelligent digital control/display DC regulated power supply

Info

Publication number: CN201611451U
Application number: CN2010201147034U
Authority: CN
Inventors: 滕敏亮
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-26
Filing date: 2010-01-26
Publication date: 2010-10-20
Anticipated expiration: 2020-01-26

Abstract

The utility model discloses an intelligent digital control/display DC regulated power supply, which is composed of an input loop, a commercial power transformer, a switching circuit, an auxiliary power supply, a CPU intelligent controller, a voltage regulation and adjustment circuit, an output voltage detector and the like. The input loop is connected with commercial power to switch in the DC regulated power supply, and is subsequently connected with an input AC fuse and then connected with a power supply transformer; a single chip machine is the control center, an adjustable power supply is in a serially-connected structure, keys are connected with control components, a keyboard circuit is rectangular in shape, a PWM1 port of the single chip machine is connected with a circuit of an operational amplifier; a PWM2 port is connected with a circuit consisting of a chopper, an adjustable voltage regulator tube and a current amplifier, in order to output reference voltage. Two A/D converted sampling circuits, namely one for data display and another for overcurrent protection, are added behind the output reference voltage; and an indicator lamp of a control panel is indicative of the current working state of the regulated power supply, and the regulated power supply has the function of maintaining the selection of last preset voltage/current value after shutdown.

Description

Intelligent numerical control digital display D.C. regulated power supply

Technical field:

The utility model relates to a kind of D.C. regulated power supply, particularly relates to a kind of intelligent numerical control digital display D.C. regulated power supply, is applicable to the use of high-precision current and monitoring voltage occasion.

Background technology:

Be all kinds of LED, led chip, led light source, LED light fixture and other various types of light sources power supply environment, satisfy various accurate and reliable test requests, but D.C. regulated power supply is regulated output voltage and electric current with manual adjustments potentiometer mode in the market, show and use mechanical voltage, cause user's required voltage, electric current to be difficult to accurate control; In traditional method for designing, if showing output is the quantized value of voltage directly to be deciphered show output, its displayed value is the input quantity of D/A conversion, because the error that D/A conversion and power driving circuit are introduced makes just bigger deviation may occur between displayed value and the power supply real output value.Use and operation is made troubles to the user, add the electric shock long term wear of mechanical current potential, can produce the loose contact phenomenon, cause the output voltage instability, may damage consumer, increase user cost.

The utility model content:

The utility model is for overcoming the deficiencies in the prior art; and provide a kind of intelligent numerical control digital display D.C. regulated power supply; have shutdown and keep predeterminated voltage last time, current value selection function; directly from keyboard input predeterminated voltage, current data, overcurrent and load short circuits holding circuit have start output voltage stepping and quick output selection function fast; the dirigibility height of system; the control accuracy height, highlighted charactron, it is more clear to show.

Realize above-mentioned purpose, the utility model adopts following technical scheme to be: input circuit connects civil power and inserts D.C. regulated power supply, connects input AC insurance back again and connects power transformer; Single-chip microcomputer is a control center, and regulated power supply is a series-mode frame, the button connection control unit, and keyboard circuit is a matrix shape, the PWM1 port of single-chip microcomputer links to each other with the circuit of operational amplifier; The port of PWM2 links to each other output reference voltage with chopper, adjustable stabilivolt and the circuit that expansion stream device is formed.The reference voltage back of output has increased the sample circuit of two A/D conversions, and one is the sample circuit of video data, and another is the sample circuit of overcurrent protection; The pilot lamp indication stabilized voltage supply work at present state of control panel.

The beneficial effects of the utility model are: have shutdown and keep predeterminated voltage last time, current value selection function; directly from keyboard input predeterminated voltage, current data; quick overcurrent and load short circuits holding circuit; have start output voltage stepping and export selection function fast; the dirigibility height of system, control accuracy height, highlighted charactron; it is more clear to show, cost is also lower simultaneously.

Description of drawings

Fig. 1 novel practical digital-control digital-display D.C. regulated power supply block scheme,

Fig. 2 novel practical digital-control digital-display D.C. regulated power supply principle sketch,

Among the figure, 1, input circuit 2, civil power transformation 3, commutation circuit 4, accessory power supply 5, master cpu 6, voltage stabilizing control and adjust that circuit 7, output current detect 8, output voltage detects 9, keyboard circuit 10, operation indicating circuit 11 display circuits

Embodiment

When stabilized voltage supply has civil power 220V input.At first, offer each circuit of voltage stabilizing again through the alternating current of 220V being converted to alternating voltages such as low pressure 14V, 20V, 24V, 34V behind the power transformer.This moment, accessory power supply was started working, and CPU is through after replying the position by cable simultaneously, and internal processes begins to begin to carry out by preassigned pattern, when the user imports predetermined voltage, electric current in external connection keyboard after, detects user's personalized pattern setting once more simultaneously by CPU behind the acknowledgement key.When detecting is immediate mode.CPU reaches preset value with regard to control output voltage moment; CPU implements to detect output voltage and electric current simultaneously, implements to regulate output voltage stabilization in predetermined value according to situations of change such as external loads.

Input circuit (1) mainly inserts civil power direct stabilized voltage supply, gives power transformer again after the input AC insurance; Civil power transformation (2) is converted to interchange 14V, 20V, the voltages such as 24V, 34V that supply complete machine work with the 220V voltage of stabilized voltage supply input through transformer, for different circuit workings are prepared; Switch electrical equipment (3) in order to reduce the pressure drop of output power pipe, CPU is according to user's default output voltage values, and pilot relay switches in the corresponding transformer secondary output tap, again through rectification, gives back level output voltage after the filtering and adjusts circuit rectification input end; The AC low-tension of accessory power supply (4) after by the transformer step-down after rectification, filtering etc. are handled, given the integrated stable voltage circuit voltage stabilizing, and the voltage after the voltage stabilizing offers late-class circuit work again; Master cpu (5) is when the stabilized voltage supply energized, CPU at first carries out electrification reset, reset finish after, and after beginning to detect user's powder source management mode and user's setting voltage, current value, CPU exports the dutycycle of corresponding PWM again according to user input data, output voltage is descended, thus the protection stabilized voltage supply; Voltage stabilizing control and adjustment circuit (6) are when load variations and input voltage variation, in order to make stabilized voltage supply that stable voltage output can be provided, the voltage stabilizing governor circuit implements to receive output voltage, current feedback, thus the adjustment voltage of control back level power tube, so that output voltage keeps stable; Output current detects (7) and detects the resistance sampling load current with high-power precision, after load current flows through detection resistance, will produce pressure drop at the resistance two ends, this pressure drop is given CPU and controlling circuit of voltage regulation again as showing and protection control reference data after processing and amplifying; Level output voltage after output voltage detection (8) Direct Sampling is given CPU again after step-down is handled and controlling circuit of voltage regulation provides demonstration and regulation voltage reference data.

Keyboard circuit (9) is used the 4+4 matrix-style, and after the user connect down corresponding button, CPU read the data of I/O mouth, and to judge user's operational order, CPU carries out the duty of corresponding control programs control stabilized voltage supply again; Operation indicating circuit (10) reminds user's input instruction effective, and CPU detects keyboard when effectively pressing, and sends whistling to inform the user by making hummer; The small-signal that display circuit (11) is given CPU with display driver resupplies digital implementation and shows current electric current and information of voltage after processing and amplifying, simultaneously the also pilot lamp indication stabilized voltage supply work at present state of control panel of CPU; Overcurrent, short-circuit protection are after the electric current of voltage regulation output current surpasses the setting current value, and after CPU handled as calculated according to current feedback signal, active user's setting current value was held in the corresponding reduction of control output voltage to continue.

Claims

1. intelligent numerical control digital display D.C. regulated power supply, mainly detect and form by input circuit, civil power transformation, commutation circuit, accessory power supply, voltage stabilizing control and adjustment circuit, output voltage, it is characterized in that: input circuit connects civil power and inserts D.C. regulated power supply, connects input AC insurance back again and connects power transformer; Single-chip microcomputer is control center's parts, the button connection control unit, and the PWM1 port of single-chip microcomputer links to each other with the circuit of operational amplifier; The port of PWM2 links to each other output reference voltage with chopper, adjustable stabilivolt and the circuit that expansion stream device is formed; The reference voltage back of output has increased the sample circuit of two A/D conversions; The pilot lamp indication stabilized voltage supply work at present state of control panel.

2. intelligent numerical control digital display D.C. regulated power supply according to claim 1, it is characterized in that: regulated power supply is a series-mode frame.

3. intelligent numerical control digital display D.C. regulated power supply according to claim 1, it is characterized in that: described keyboard circuit is a matrix shape.

4. intelligent numerical control digital display D.C. regulated power supply according to claim 1 is characterized in that: described two sample circuits, and one is the sample circuit of video data, another is the sample circuit of overcurrent protection.