CN205335889U

CN205335889U - Adjustable power charge -discharge ware based on TL494

Info

Publication number: CN205335889U
Application number: CN201521104174.9U
Authority: CN
Inventors: 黄瑞; 付碧阳; 吴聪聪; 陈东; 汪克军
Original assignee: Anhui Normal University
Current assignee: Anhui Normal University
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2016-06-22
Anticipated expiration: 2025-12-24

Abstract

The utility model relates to an adjustable power charge -discharge ware based on TL494, including TL494 master control circuit, energy storage power supply, auxiliary electrical power source and observing and controlling module, wherein TL494 master control circuit includes the step -down type BUCK electricity charging module and the type BOOST circuit that the steps up module of discharging. Wherein energy storage power supply is the lithium cell, converts the commercial power to direct current through step -down type BUCK electricity charging module and charges for it to energy storage power supply discharges the module for being supplied power with electrical apparatus through the type BOOST circuit that steps up. It through the real -time detection to TL494 master control circuit, passes through LCD with data and shows in real time wherein to observe and control the module to observe and control the module and receive key signal, thus control TL494 master control circuit's PWM duty cycle, thus obtain different output voltage. Wherein auxiliary electrical power source gives TL494 master control circuit and observes and controls the module power supply, has guaranteed the stable work of circuit.

Description

A kind of regulating power charge and discharge electrical equipment based on TL494

Technical field

This utility model belongs to field of power supplies, particularly to a kind of power charge and discharge appliance field。

Background technology

Development along with life, in people live, compact power uses increasingly wider, such as little of charger baby, big to electric automobile,, for different equipment, we to mate different batteries and be charged, so considerably increase the kind of our battery, so limitation is big, cost is high, and seems loaded down with trivial details especially。When we need battery is charged by the clean energy resource of such as solar energy class, due to charging power we can not control, so can not the current/voltage of each battery be mated, the limitation of utilization is just big。

Single battery can only be charged and discharged by similar power module, limitation is very big, the charger volume of relatively high power electrical appliance is bigger, not portable, and the loss of midway is relatively big, is unfavorable for energy-saving and emission-reduction, and the article as similar charger baby can't be general, output can not regulate, and such electrical appliance just can only specific voltage。Therefore, we need one badly and can carry voluntarily, and power adjustable, use the charge and discharge device that space is less。

Utility model content

The purpose of this utility model is in that to provide a kind of regulating power charge and discharge electrical equipment based on TL494, and this charge and discharge electrical equipment can regulate input and the voltage of output, more convenient actual utilization。

For achieving the above object, this utility model have employed techniques below scheme:

A kind of regulating power charge and discharge electrical equipment based on TL494, including governor circuit, control module and accessory power supply, it is characterized in that, described governor circuit includes BUCK circuit charging module and BOOST circuit discharging module, and wherein BUCK circuit charging module and BOOST circuit discharging module are driven by the drive circuit including TL494 driving chip；

Described control module includes current detection circuit, voltage detecting circuit, key-press module, with electric current when exporting and voltage when current detection circuit and voltage detecting circuit detection charging module and discharge module input, key-press module is transferred signals to by button in charging module and discharge module, and key-press module can control output size。

Further, charge and discharge electrical equipment also includes auxiliary power module, and auxiliary power module is powered to control module。

Further, described BUCK circuit charging module is that rectification circuit, BUCK circuit and filter circuit are sequentially connected with。

Further, described BOOST circuit discharging module is that BOOST circuit, inverter circuit and filter circuit are sequentially connected with。

Further, described control module uses STC12C5A16S2 single-chip microcomputer。

Further, described charge and discharge electrical equipment also includes LCD display module, and accessory power supply is powered to LCD display module。

By above technical scheme it can be seen that the beneficial effects of the utility model are:

(1) this utility model uses TL494 governor circuit, and this is the dual quadrant operation of power supply class DC converter, it is possible to achieve the transmitted in both directions of energy。

(2) this utility model control module includes the button that can regulate circuit output voltage, can to the conversion of charge mode and discharge mode, can also control to achieve accumulation power supply constant-current charge and bringing onto load constant voltage discharge so that the TL494 BUCK circuit being core and BOOST circuit are real by synchronous rectification MOS mode, the charging of a greater variety of accumulation power supplies can be given so respectively and power to a greater variety of electrical appliances。

(3) in this utility model, voltage-dropping type BUCK circuit output DC is for accumulation power supply charging, discharges after booster type BOOST circuit output DC。Electric current and voltage input end are acquired comparing by voltage sensor, current sensor and carry out feedback control again through single-chip microcomputer。So can show on LCD, it is possible to by by key control, thus better realizing human-computer interaction。

(4) this utility model can produce different alternating voltages by discharge module, so make the electrical appliance of the country of a lot of different line voltage to use。

Accompanying drawing explanation

Fig. 1 is structured flowchart of the present utility model；

Fig. 2 is BUCK circuit charging module circuit diagram in this utility model；

Fig. 3 be in this utility model produce pwm signal circuit diagram；

Fig. 4 is this utility model BOOST circuit discharging module circuit diagram。

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described further:

As it is shown in figure 1, a kind of regulating power charge and discharge electrical equipment based on TL494, including governor circuit, control module, accessory power supply and LCD display module, wherein control module includes current detection circuit, voltage detecting circuit, key-press module。The control chip of control module is STC12C5A16S2 single-chip microcomputer。LCD display module shows current charging voltage and electric current, also has the real-time charge capacity of accumulation power supply。In this charger operation process, civil power by TL494 governor circuit voltage-dropping type BUCK circuit charging module, and controlled accumulation power supply is charged by civil power as constant-current source by control module, when needing to use the electricity in accumulation power supply, the accumulation power supply booster type BOOST circuit discharging module by TL494 governor circuit, and controlled to make accumulation power supply as constant pressure source by control module, to electrical appliance constant voltage discharge。Wherein control module utilizes voltage, current sensor to be acquired comparing to BUCK circuit output voltage electric current, and can regulate charging current by button high accuracy。When charging has the mode of two kinds of protection power supplys after being full of, a kind of mode takes switch to be switched to discharge mode, after another way is fully charged, automatically disconnects charging circuit, and this is controlled mainly by the program of single-chip microcomputer STC12C5A16S2。Wherein accessory power supply is individually powered to control module and LCD display module, so can for system stability provide one layer of guarantee。

As in figure 2 it is shown, be BUCK circuit charging module circuit diagram, civil power passes through rectification circuit, converts alternating current to unidirectional current, is then passed through BUCK circuit, and wherein the control end input pwm signal of BUCK circuit metal-oxide-semiconductor, charges a battery after R1 and C2 capacitance-resistance filter。Wherein pwm signal can regulate。

As shown in Figure 3, for producing the drive circuit of pwm signal, the chip of this drive circuit is TL494, wherein E1 and E2 foot produces pwm signal, 1IN+ is connected with single-chip microcomputer STC12C5A16S2, detect current current/voltage respectively by the current detection circuit in control module and voltage detecting circuit, and by the control of single-chip microcomputer, show in LCD display module in real time。The key-press module connected from single-chip microcomputer can arrange different numerical value and be input in single-chip microcomputer, single-chip microcomputer regulates dutycycle by controlling TL494, thus obtaining different PWM, thus can export different DC voltages, it is possible to the accumulation power supply charging to different voltages。

As shown in Figure 4, wherein P1 is the outfan of accumulation power supply, after the filtering of electric capacity C2 and C9, boosted by BOOST circuit, the wherein control end input pwm signal of metal-oxide-semiconductor in BOOST circuit, unidirectional current after boosting still can not directly feed daily electrical appliance, need through Q1, Q2, Q3, Q4 inversion post filtering just can be connected with electrical appliance, the wherein control end input pwm signal of the metal-oxide-semiconductor in BOOST circuit, now the drive circuit of TL494 is identical with the drive circuit in BUCK circuit, wherein E1 and E2 foot produces pwm signal, 1IN+ is connected with single-chip microcomputer STC12C5A16S2, current current/voltage is detected respectively by the current detection circuit in control module and voltage detecting circuit, and by the control of single-chip microcomputer, show in LCD display module in real time。The key-press module connected from single-chip microcomputer can arrange different numerical value and be input in single-chip microcomputer, single-chip microcomputer regulates dutycycle by controlling TL494, thus obtaining different PWM, thus can export different DC voltages, finally by the alternating current obtaining different voltage after inversion, so go for the electrical appliance of country variant。

Embodiment described above is only that preferred implementation of the present utility model is described; not the scope of utility model is defined; under the premise designing spirit without departing from this utility model; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims are determined。

Claims

1. the regulating power charge and discharge electrical equipment based on TL494, including governor circuit, control module and accessory power supply, it is characterized in that, described governor circuit includes BUCK circuit charging module and BOOST circuit discharging module, and wherein BUCK circuit charging module and BOOST circuit discharging module are driven by the drive circuit including TL494 driving chip；

2. a kind of regulating power charge and discharge electrical equipment based on TL494 according to claim 1, it is characterised in that also including auxiliary power module, auxiliary power module is powered to control module。

3. a kind of regulating power charge and discharge electrical equipment based on TL494 according to claim 1, it is characterised in that described BUCK circuit charging module is that rectification circuit, BUCK circuit and filter circuit are sequentially connected with。

4. a kind of regulating power charge and discharge electrical equipment based on TL494 according to claim 1, it is characterised in that described BOOST circuit discharging module is that BOOST circuit, inverter circuit and filter circuit are sequentially connected with。

5. a kind of regulating power charge and discharge electrical equipment based on TL494 according to claim 1, it is characterised in that described control module uses STC12C5A16S2 single-chip microcomputer。

6. a kind of regulating power charge and discharge electrical equipment based on TL494 according to claim 1, it is characterised in that described charge and discharge electrical equipment also includes LCD display module, and accessory power supply is powered to LCD display module。