This is Micro inverter or The inverter very
small-sized, perform modify from the energy battery the small-sized ,
have the value voltage about 220V AC Volt 50HZ. By the circuit composes 2
transistors performs pulse oscillator generator or Square wave
generator, for drive the coil transformer have voltage tall about 220V
at 50Hz frequencies. By can change the value RC when give the frequency
can modify. This circuit have current about 100mA depend on the
transistor and Transformer. The detail is other total up PCB see in a
picture below.
Note: Please read “Testing / application” below for real application.
Micro Inverter by 2N6121
A voltage converter DCV into ACV always called that “inverter circuit”. Which this micro inverter circuit very tiny, acts as convert voltage from the 12 VDC battery to ACV in range of 180V to 220 V-AC, by have frequencies in range of 30Hz to 65 Hz. And can be used with a general electric devices so current consumption under 10 watt. Such as a small compact fluorescent, a CD player, a general small radio, as more popular than incandescent bulbs because the light-colored eyes and saves more power.
This inverter project use a universal transformer with a dual power transistors. We easily assemble all parts with wiring the joint only, because a small projects, so you’ve succeeded in making a good inline solder connection within five minute.
Description circuit.
The normally DC to AC converting circuit will include the oscillator circuit, that uses the source voltage is 12 Volts-DC, then drive current through a center trap coil.
The transformer should be a difficult saturation core form, to protects a high current flow through to coil.
By uses dual power transistors is a push-pull switching (working alternates) Both transistors should have current gain rates similar, but not necessarily equal
Figure 1 The circuit diagram of micro inverter.
When we apply voltage are in to this project. An one transistor will be saturation point (close circuit) faster than other, to set Q1 close circuit before. The collector current of Q1, Therefore, to create a magnetic field in the.L2-coil then get a base voltage more through a R1-resistor.
The Q1-transistor so into the close circuit state fast and making Q2 open circuit faster as well. This manner condition remained until the transformer core to saturation. Therefore, cause current flowing through R1 reduce until not enough makes Q1 is in close circuit state.
On the contrary, while Q1 begins to change slowly. From the close circuit into opent circuit that, The Q2 also will start conductor higher. The current flowing through R2 will add bias to Q2, makes Q2 close circuit faster.
Now the current from battery will flow reverses the direction in the coil-L1. Cause the induced voltage polarity is reversed in the secondary coil of transformer, Q2 will still conductor until transformer core to saturation point.
From this point, the process of ON-OFF circuit on Q1 and Q2 will reverse again. Throughout entering the power to the DC circuit.
The capacitors that drop across the primary coil will make ACV at output smoothing without noise.
How to builds
For in project use a few components so use how wiring without PCB layout as Figure 2 I suggest some building techniques, as follows.
Figure 2 The wiring of this project
1. Use a mica insulator insert between case and body of transistor, then use a plastic insulator acts as hold the transistor body with hex nut and metal screw (as Figure 3)
Figure 3 The mountiong the transistor in a heatsink
2. Remember do not any lead of transistor touch case or short circuit between these lead.
3. Use ohmmeter check short circuit of various devices, does not short circuit with case. By used VOM set Rx1 range then point at leads of device,It must not read as 0 ohms. as Figure 4.
Figure 4 Check short circuit with multimeter
Testing / application.
4. For example I use this projects to LED lamp 220V 3watt because Low power consumption.
I test working as follows step:
1. Use the 12 VDC battery 2.5Ahor 12VDC regulated current more than 2A to testing.
2. Use AC volts meter measure by set 500 VAC range or AC volts digital meter such as I use.
3. Apply the 12 VDC source to this project.
4. Measure the output voltage. Should read voltage during 220 V up to 330 VAC
.
After that, try uses load as LED lamp-220 VAC 3 watts to load.
This circuit have power output about 5watts to 10 watts only.
As video LED lamp glow brighly for 3 hour because it use 0.5A only.
I assemble parts include 2xTIP41 with heatsink, 1K-resistors on the universal PCB board.
Note: Since I have limit parts so use near parts only. I use 0.75A 9V ct 9V transformer and TIP41 of 2 pcs.
If you want to use higher watts, you can change some parts
In the event of adding power is 25 W to use the transformer that provide the current over than 2A, and changes R1 and R2 are 100 ohms 5W instead.
Components list.
Semiconductors
Q1, Q2___TIP41 or 2N6121____transistor NPN 40W 45V 4A
LED1_____Red LED or as you need.
Resistors (0.5W + 5% Caron)
R1, R2____1K
R3______4.7K
Capacitors
C1______0.1uF 630V __Mylar
miscellaneous
T1_______Transformer 220 VAC/10-0-10V, 750 mA- seconary coil
F1_______Fuse- 0.5 A
SW1_____Toggle switch
AC- plug, mica insulator, LED, plastics, 12 VDC Battery, solid Wires no. 20 AWG length 1 feet, nut and screw, etc.
sumber : http://www.eleccircuit.com/micro-inverter-by-2n5121/
Note: Please read “Testing / application” below for real application.
Micro Inverter by 2N6121
A voltage converter DCV into ACV always called that “inverter circuit”. Which this micro inverter circuit very tiny, acts as convert voltage from the 12 VDC battery to ACV in range of 180V to 220 V-AC, by have frequencies in range of 30Hz to 65 Hz. And can be used with a general electric devices so current consumption under 10 watt. Such as a small compact fluorescent, a CD player, a general small radio, as more popular than incandescent bulbs because the light-colored eyes and saves more power.
This inverter project use a universal transformer with a dual power transistors. We easily assemble all parts with wiring the joint only, because a small projects, so you’ve succeeded in making a good inline solder connection within five minute.
Description circuit.
The normally DC to AC converting circuit will include the oscillator circuit, that uses the source voltage is 12 Volts-DC, then drive current through a center trap coil.
The transformer should be a difficult saturation core form, to protects a high current flow through to coil.
By uses dual power transistors is a push-pull switching (working alternates) Both transistors should have current gain rates similar, but not necessarily equal
Figure 1 The circuit diagram of micro inverter.
When we apply voltage are in to this project. An one transistor will be saturation point (close circuit) faster than other, to set Q1 close circuit before. The collector current of Q1, Therefore, to create a magnetic field in the.L2-coil then get a base voltage more through a R1-resistor.
The Q1-transistor so into the close circuit state fast and making Q2 open circuit faster as well. This manner condition remained until the transformer core to saturation. Therefore, cause current flowing through R1 reduce until not enough makes Q1 is in close circuit state.
On the contrary, while Q1 begins to change slowly. From the close circuit into opent circuit that, The Q2 also will start conductor higher. The current flowing through R2 will add bias to Q2, makes Q2 close circuit faster.
Now the current from battery will flow reverses the direction in the coil-L1. Cause the induced voltage polarity is reversed in the secondary coil of transformer, Q2 will still conductor until transformer core to saturation point.
From this point, the process of ON-OFF circuit on Q1 and Q2 will reverse again. Throughout entering the power to the DC circuit.
The capacitors that drop across the primary coil will make ACV at output smoothing without noise.
How to builds
For in project use a few components so use how wiring without PCB layout as Figure 2 I suggest some building techniques, as follows.
Figure 2 The wiring of this project
1. Use a mica insulator insert between case and body of transistor, then use a plastic insulator acts as hold the transistor body with hex nut and metal screw (as Figure 3)
Figure 3 The mountiong the transistor in a heatsink
2. Remember do not any lead of transistor touch case or short circuit between these lead.
3. Use ohmmeter check short circuit of various devices, does not short circuit with case. By used VOM set Rx1 range then point at leads of device,It must not read as 0 ohms. as Figure 4.
Figure 4 Check short circuit with multimeter
Testing / application.
4. For example I use this projects to LED lamp 220V 3watt because Low power consumption.
I test working as follows step:
1. Use the 12 VDC battery 2.5Ahor 12VDC regulated current more than 2A to testing.
2. Use AC volts meter measure by set 500 VAC range or AC volts digital meter such as I use.
3. Apply the 12 VDC source to this project.
4. Measure the output voltage. Should read voltage during 220 V up to 330 VAC
.
After that, try uses load as LED lamp-220 VAC 3 watts to load.
This circuit have power output about 5watts to 10 watts only.
As video LED lamp glow brighly for 3 hour because it use 0.5A only.
I assemble parts include 2xTIP41 with heatsink, 1K-resistors on the universal PCB board.
Note: Since I have limit parts so use near parts only. I use 0.75A 9V ct 9V transformer and TIP41 of 2 pcs.
If you want to use higher watts, you can change some parts
In the event of adding power is 25 W to use the transformer that provide the current over than 2A, and changes R1 and R2 are 100 ohms 5W instead.
Components list.
Semiconductors
Q1, Q2___TIP41 or 2N6121____transistor NPN 40W 45V 4A
LED1_____Red LED or as you need.
Resistors (0.5W + 5% Caron)
R1, R2____1K
R3______4.7K
Capacitors
C1______0.1uF 630V __Mylar
miscellaneous
T1_______Transformer 220 VAC/10-0-10V, 750 mA- seconary coil
F1_______Fuse- 0.5 A
SW1_____Toggle switch
AC- plug, mica insulator, LED, plastics, 12 VDC Battery, solid Wires no. 20 AWG length 1 feet, nut and screw, etc.
sumber : http://www.eleccircuit.com/micro-inverter-by-2n5121/