CN202453690U - Constant current circuit controller controlled by micro controller unit (MCU) - Google Patents
Constant current circuit controller controlled by micro controller unit (MCU) Download PDFInfo
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- CN202453690U CN202453690U CN2012200646369U CN201220064636U CN202453690U CN 202453690 U CN202453690 U CN 202453690U CN 2012200646369 U CN2012200646369 U CN 2012200646369U CN 201220064636 U CN201220064636 U CN 201220064636U CN 202453690 U CN202453690 U CN 202453690U
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- circuit
- power supply
- controller
- triode
- chip controlling
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Abstract
A constant current circuit controller controlled by an MCU comprises a power supply, a step-down circuit, a rectifier circuit, a direct current (DC) power supply circuit, an MCU control unit, a relay control circuit and a pulse width modulation (PWM) switching circuit which form a controller loop. An alternating current (AC) power supply is stepped down by the step-down circuit, rectified by the rectifier circuit and loaded to the DC power supply circuit which supplies power for the MCU control unit, the MCU control unit sends out control signals to the relay control circuit and controls on and off of a second triode and a fourth triode of the relay control circuit, and the MCU control unit sends out control signals to the PWM switching circuit to generate PWM signals at a certain frequency so as to control on and off of a first triode and a third triode. The controller has few components and has no components with large power and size, therefore the size of the controller can be small, and the controller is extremely suitable for being applied to products with simple functions but have close restraint on the controller size.
Description
Technical field:
The utility model relates to the controller technology field, belongs to consumer electronics product control field, more specifically to the constant-current controller of a kind of unit machine.
Background technology:
To consumer electronics product; Power supply step-down mode from the forceful electric power to light current has only the components and parts that use on the resistance step-down mode to save most at present, but when load current is big; Ohmically thermal value is bigger; In requisition for resistance high-power, big volume, and the resistance of big volume makes that the controller volume is bigger, is difficult for being accepted by the user.The purpose of the utility model is exactly to above-mentioned drawback, comprehensively reaches the effect that makes controller accomplish miniaturization in several ways.
The utility model content:
The purpose of the utility model is exactly the deficiency to prior art; And a kind of Single-chip Controlling constant-current circuit controller is provided; Its controller component is few; And do not have high-power, big volume device (except the relay), can with its volume do very little, be suitable for very much in function simple but the controller size had on the product of strict restriction and promote the use of.
The technological solution of the utility model is following:
A kind of Single-chip Controlling constant-current circuit controller, by power supply, reduction voltage circuit, rectification circuit, DC power supply circuit, Single-chip Controlling unit, control relay circuit and PWM on-off circuit constitute a controller loop,
Communication power supply is through the reduction voltage circuit step-down; After the rectification circuit rectification, load again and give DC power supply circuit; DC power supply circuit is given the power supply of Single-chip Controlling unit; The Single-chip Controlling unit sends control signal and opens or close for second triode and the 4th triode of control relay circuit pilot relay control circuit, and the Single-chip Controlling unit sends that pwm signal that control signal produces certain frequency for the PWM on-off circuit is controlled first triode and the 3rd triode is opened or closed.
Said power supply is 120VAC, and DC power supply circuit is the 5VDC power circuit, and reduction voltage circuit is made up of first resistance, second resistance, the 3rd resistance and the series connection of the 4th resistance.
The beneficial effect of the utility model is:
1, its controller component is few, and does not have high-power, big volume device (except the relay), can with its volume do very little, be suitable for very much in function simple but the controller size had on the product of strict restriction and promote the use of, like electric iron etc.
2, except that resistance, relay, electrochemical capacitor, other devices all adopt the paster packaging, and maximizing ground reduces volume.
3, its Single-chip Controlling unit remains no I/O mouth and also can be used for expansion realizing some different functions, thereby enriches the controller usable range.
Description of drawings:
Fig. 1 is the circuit block diagram of the utility model
Fig. 2 is the circuit diagram of the utility model
Embodiment:
Embodiment: see Fig. 1, shown in 2; A kind of Single-chip Controlling constant-current circuit controller; By power supply 1, reduction voltage circuit 2, rectification circuit 3, DC power supply circuit 4, Single-chip Controlling unit 5, control relay circuit 6 and PWM on-off circuit 7 constitute a controller loop
Communication power supply 1 is through reduction voltage circuit 2 step-downs; After rectification circuit 3 rectifications, load again and give DC power supply circuit 4; DC power supply circuit 4 gives the Single-chip Controlling unit 5 power supplies; Single-chip Controlling unit 5 sends control signal and opens or close for the second triode Q2 and the 4th triode Q4 of control relay circuit 6 pilot relay control circuits 6, and Single-chip Controlling unit 5 sends that pwm signal that control signal produces certain frequencies for PWM on-off circuit 7 is controlled the first triode Q1 and the 3rd triode Q3 opens or closes.
Said power supply 1 is 120VAC, and DC power supply circuit 4 is the 5VDC power circuit, and reduction voltage circuit 2 is made up of first resistance R 1, second resistance R 2, the 3rd resistance R 3 and 4 series connection of the 4th resistance R.
Principle of work: when control signal is given the relay coil power supply in the control relay circuit 6; The first triode Q1, the second triode Q2 are connected in the controller loop; The loop is in fully conducting state, and the controller loop current is in a fixed value, when relay coil two terminal shortcircuits (relay contact disconnection); Controller loop resulting impedance reduces; Peak point current rises, and control the first triode Q1 through the PWM on-off circuit and open the closing controller loop with, the 3rd triode Q3 CC by certain dutycycle this moment, guarantees that the average current in loop remains unchanged.Make the current average in loop and being consistent before, constant with the average power of keeping on the dropping resistor, thus the dropping resistor of miniwatt easy to use, small size.
The tandem type connected mode is adopted in load, no matter the load total current is much, whole loop current is a road identical with maximum wherein only.This controller has adopted relay circuit and 5V circuit loop the connected mode of tandem type.
Select the resistance of miniaturization volume for use, for same nominal power standard volume resistance, this resistance length and diameter all have bigger minimizing.The design has used 4 miniaturization resistance, if the environment heat radiation better, also can use 3 miniaturization resistance.
Claims (2)
1. Single-chip Controlling constant-current circuit controller; It is characterized in that: by power supply (1); Reduction voltage circuit (2), rectification circuit (3), DC power supply circuit (4), Single-chip Controlling unit (5), control relay circuit (6) and PWM on-off circuit (7) constitute a controller loop
Communication power supply (1) is through reduction voltage circuit (2) step-down; After rectification circuit (3) rectification, load again and give DC power supply circuit (4); DC power supply circuit (4) is given Single-chip Controlling unit (5) power supply; Single-chip Controlling unit (5) sends control signal and opens or close for second triode (Q2) and the 4th triode (Q4) of control relay circuit (6) pilot relay control circuit (6), and Single-chip Controlling unit (5) are sent control signal and controlled first relay (Q1) for the pwm signal of PWM on-off circuit (7) generation certain frequency and the 3rd triode (Q3) is opened or closed.
2. a kind of Single-chip Controlling constant-current circuit controller according to claim 1; It is characterized in that: power supply is 120VAC; DC power supply circuit (4) is the 5VDC power circuit, and reduction voltage circuit (2) is made up of first resistance (R1), second resistance (R2), the 3rd resistance (R3) and the 4th resistance (R4) series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200646369U CN202453690U (en) | 2012-02-27 | 2012-02-27 | Constant current circuit controller controlled by micro controller unit (MCU) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200646369U CN202453690U (en) | 2012-02-27 | 2012-02-27 | Constant current circuit controller controlled by micro controller unit (MCU) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202453690U true CN202453690U (en) | 2012-09-26 |
Family
ID=46869543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200646369U Expired - Fee Related CN202453690U (en) | 2012-02-27 | 2012-02-27 | Constant current circuit controller controlled by micro controller unit (MCU) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202453690U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785212A (en) * | 2017-10-31 | 2018-03-09 | 厦门芯阳科技股份有限公司 | A kind of method that resistance-capacitance depressurization passes through exchange way control relay |
| CN108286059A (en) * | 2018-03-11 | 2018-07-17 | 临沂康唯美电子产品有限公司 | For electrolysis water electrolytic cell constant-current electrolysis control system |
-
2012
- 2012-02-27 CN CN2012200646369U patent/CN202453690U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785212A (en) * | 2017-10-31 | 2018-03-09 | 厦门芯阳科技股份有限公司 | A kind of method that resistance-capacitance depressurization passes through exchange way control relay |
| CN108286059A (en) * | 2018-03-11 | 2018-07-17 | 临沂康唯美电子产品有限公司 | For electrolysis water electrolytic cell constant-current electrolysis control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20190227 |