inverter is a DC power ( battery, accumulator ) change into alternating current ( typically 220v50HZ sine or square wave ). Emergency power supply, is generally the DC battery reverse into 220V.
Popular speaking, the inverter is a direct current ( DC ) into alternating current ( AC ) device. It consists of inverter, control logic and a filter circuit.
Using TL494 400W high power voltage and inverter circuit. It stimulated transformation part uses the TL494, VT1, VT2, VD3, VD4 sink current driving circuit, driving two by two
60V/30A MOS FET switch tube. Such as the need to improve the output power, each with 3～4 switching tubes parallel application, circuit constant. TL494 in the inverter application methods are as follows:
First, 2 foot voltage sampling, error amplification system, positive input end 1 pin input inverter secondary sampling winding rectifier output DC voltage of 15V, R1, R2 partial pressure, so that first feet in the inverter when in normal work of nearly 4.7～ 5.6V sampling voltage. Inverting input pin 2 5V input reference voltage ( from 14 foot output ). When the output voltage is reduced, 1 feet lower voltage, the error amplifier output low level, through the PWM circuit to make the output voltage rise. Normal 1 foot voltage value is 5.4V, 2 feet 5V 3 feet voltage value, voltage value of 0.06V. When the output voltage is AC to 235V ( square wave voltage). The fourth foot outside R6, R4, C2 set the dead time. Normal voltage value of 0.01V. In fifth, the 6 foot outside CT, set the RT oscillator frequency of the triangular wave 100Hz. Normal voltage value of 1.75V 5 foot, 6 foot voltage value of 3.73V. The seventh foot is a common ground. Eighth, 11 feet of inner drive output triode collector, Twelfth feet for the TL494 level before the power supply end, the three end of the switch S controlled TL494 start / stop, as the inverter control switch. When the S1 off, TL494 output pulses, thus switching tube VT4 ~ VT6 without any current. S1 is switched on, the tripods voltage value of positive battery voltage. Ninth, 10 feet for the internal drive triode emitter, two-way output timing of different positive pulse. Normal voltage value of 1.8V. Thirteenth, 14, 15 feet 14 feet 5V output reference voltage, the 13 foot high 5V level, control circuit, trigger output two drive pulse, for push-pull switching circuit. Fifteenth feet external 5V voltage, pose error amplifier inverting input reference voltage, to make the non-inverting input end of 16 foot high level protection input. This method, when the input is greater than sixteenth feet 5V high level, the lower the output voltage stabilizing function, or turn off the driving pulse and the realization of protection. In the inverter output pressure of the possibility of a little, so the circuit is not used by the sixteenth foot, grounding resistance R8.
The inverter uses capacity of 400VA industrial frequency transformer, iron core is made of 45 × 60mm2 silicon steel sheet. The primary winding of the diameter 1.2mm of the enameled wire, two and 2 x 20 turns around. Secondary sampling winding using 0.41mm enameled wire winding 36 turns, center tap. The secondary winding by 230V, using 0.8mm enameled wire winding 400 turns. Switching tube VT4～ VT6 60V/30A available to any model of N channel MOS FET tube instead of. Avai
lable VD7 1N400X series of ordinary diode. The circuit can work normally without debugging almost. When C9 is extreme voltage is 12V, R1 in 3.6 ～4.7K Ωto choose between, or 10K Ωpotentiometer adjustment, so that the output voltage and rated. If the output power increases near 600W, in order to avoid the primary current is too large, increasing resistive loss, should be changed to 24V battery, switch tube can be made of VDS 100V MOS FET tube current. It is noted, would rather choose multi-pipe parallel connection, and do not choose one of IDS more than 50A switch tube, its reason is: a high price, two driving too difficult. Suggested the use of 100V/32A 2SK564, or a total of three 2SK906 parallel application. At the same time, transformer core section must meet the 50cm2, according to the common power transformer calculation method to calculate the number of turns and diameter, or by using waste UPS-600 transformer substitution. Such as refrigerators, electric power, do not forget to join LC low pass filterhttp://www.12vgridtiepowerinverters.com/
Popular speaking, the inverter is a direct current ( DC ) into alternating current ( AC ) device. It consists of inverter, control logic and a filter circuit.
Using TL494 400W high power voltage and inverter circuit. It stimulated transformation part uses the TL494, VT1, VT2, VD3, VD4 sink current driving circuit, driving two by two
60V/30A MOS FET switch tube. Such as the need to improve the output power, each with 3～4 switching tubes parallel application, circuit constant. TL494 in the inverter application methods are as follows:
First, 2 foot voltage sampling, error amplification system, positive input end 1 pin input inverter secondary sampling winding rectifier output DC voltage of 15V, R1, R2 partial pressure, so that first feet in the inverter when in normal work of nearly 4.7～ 5.6V sampling voltage. Inverting input pin 2 5V input reference voltage ( from 14 foot output ). When the output voltage is reduced, 1 feet lower voltage, the error amplifier output low level, through the PWM circuit to make the output voltage rise. Normal 1 foot voltage value is 5.4V, 2 feet 5V 3 feet voltage value, voltage value of 0.06V. When the output voltage is AC to 235V ( square wave voltage). The fourth foot outside R6, R4, C2 set the dead time. Normal voltage value of 0.01V. In fifth, the 6 foot outside CT, set the RT oscillator frequency of the triangular wave 100Hz. Normal voltage value of 1.75V 5 foot, 6 foot voltage value of 3.73V. The seventh foot is a common ground. Eighth, 11 feet of inner drive output triode collector, Twelfth feet for the TL494 level before the power supply end, the three end of the switch S controlled TL494 start / stop, as the inverter control switch. When the S1 off, TL494 output pulses, thus switching tube VT4 ~ VT6 without any current. S1 is switched on, the tripods voltage value of positive battery voltage. Ninth, 10 feet for the internal drive triode emitter, two-way output timing of different positive pulse. Normal voltage value of 1.8V. Thirteenth, 14, 15 feet 14 feet 5V output reference voltage, the 13 foot high 5V level, control circuit, trigger output two drive pulse, for push-pull switching circuit. Fifteenth feet external 5V voltage, pose error amplifier inverting input reference voltage, to make the non-inverting input end of 16 foot high level protection input. This method, when the input is greater than sixteenth feet 5V high level, the lower the output voltage stabilizing function, or turn off the driving pulse and the realization of protection. In the inverter output pressure of the possibility of a little, so the circuit is not used by the sixteenth foot, grounding resistance R8.
The inverter uses capacity of 400VA industrial frequency transformer, iron core is made of 45 × 60mm2 silicon steel sheet. The primary winding of the diameter 1.2mm of the enameled wire, two and 2 x 20 turns around. Secondary sampling winding using 0.41mm enameled wire winding 36 turns, center tap. The secondary winding by 230V, using 0.8mm enameled wire winding 400 turns. Switching tube VT4～ VT6 60V/30A available to any model of N channel MOS FET tube instead of. Avai
lable VD7 1N400X series of ordinary diode. The circuit can work normally without debugging almost. When C9 is extreme voltage is 12V, R1 in 3.6 ～4.7K Ωto choose between, or 10K Ωpotentiometer adjustment, so that the output voltage and rated. If the output power increases near 600W, in order to avoid the primary current is too large, increasing resistive loss, should be changed to 24V battery, switch tube can be made of VDS 100V MOS FET tube current. It is noted, would rather choose multi-pipe parallel connection, and do not choose one of IDS more than 50A switch tube, its reason is: a high price, two driving too difficult. Suggested the use of 100V/32A 2SK564, or a total of three 2SK906 parallel application. At the same time, transformer core section must meet the 50cm2, according to the common power transformer calculation method to calculate the number of turns and diameter, or by using waste UPS-600 transformer substitution. Such as refrigerators, electric power, do not forget to join LC low pass filterhttp://www.12vgridtiepowerinverters.com/
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