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high inrush current at startup which is 10 x rated current is dropping converter output voltage.
the converter is working in voltage mode. i think the motor require a soft start circuit at the motor input
to reduce inrush current or a pwm soft start. can it work if soft start implement in TL494...
according to my calculation P = 400 watts , V = 48 Vdc , I = 8.33 Amp. mpp of two solar panel is exist at 76% of the VOC. that is Vmpp = 72.9 mpp
for 48Vout at this Vmpp the D = 48/73 = 66%. the converter require stable 73 Vdc at the input in loaded condition. each panel is rated for 13 ampere...
now it is correct that Effi = Pout/Pin While duty cycle D = Vout/Vin. with this converter i 'm trying to run a 400watt water pump that is 48Vdc & 8.3Amp with two 550watt 48v in series by adjusting the converter output voltage to 48Vdc but the converter efficiency drop at this output voltage...
I see equation for buck converter efficiency in an article on google that is D = Vout/(Vin x efficiency) seeing this equation tell that higher efficiency require lower D (duty cycle ) but for high Vout higher duty cycle required dropping efficiency according to equation.
after replacing low side Mosfets with shotckey Barrier diode. i did not test the converter with 100Vdc input to test efficiency at 48Vdc output.
only test it with one 550Watt solar panel with DC IN voltage = 41Vdc , with DC IN current = 8.5Amp total I/P power = 348watt & output power Vdc-...
i change my design from synchronous to asynchronous by using shotcky barrier 20H100 instead bottom FET as bottom FET is heating a lot. now at Vout = 14vdc and Iout = 23Amp dc with a little heating but still efficiency drop occure at high Vin-dc
after some experiments the synchronous converter starts working with 83 to 90% power conversion efficiency using irf4115 mosfets on high & low side.
connect it to Vin = 48 vdc from a 540 watts solar panel set output voltage Vout = 14vdc and Iout = 23 amp getting 8.8 amp from solar panel while...
as suggested in post#5 i use the new one good IR2104 and the converter has starts working as expected
connect pin#9 and 10 of TL494 in parallel for higher duty cycle. currently i test the converter with only 12 watt Vin = 12vdc & Iin = 1Amp dc input and
set the Vout = 10 volt and Iout = 1Amp...
replacing the low side mosfet with high power shotcky diode like 20H100 works by only using high side mosfet
for converter operation but here another problem comes with the output voltage that is the output voltage swing upto 6vdc
in my circuit i set output voltage using potentiometer at Vout =...
the problem is "max half output voltage" if to connect LIN to GND and remove R6 and R9. can it solve the
voltage regulation at max 11vdc or less. will the driver will do the synchronous buck voltage conversion at only Hin?
1698432579
"in the schematic diagram posted in post#1 pin#13 of TL494...
can i use here "IR2104 LOW HIGH side driver" there is one Input pulse to IR2104 by little changing above circuit
configuration. Pin#9 & 10 of TL494 to GND and using either pin#8 or 9 for input pulse to IR2104 to avoid symmetric pulse
problem in IR2110.
that's picture of an inverter based on TL494 & HIGH LOW side mosfet driver IR2101. i modefied this picture for my
synchronous buck converter placed a ferrite inductor instead of transformer. use IR2110 as driver while output side is
as like shown in following picture.
feedback loop of the...
it tells us that shifting a bit 1 place in C language set the corresponding bit in timer0A or timer0B
mean that "TCCR0A |= (1 << WGM01)" set it to WGM01 = 1; if this the case will it may not be more simple to
code it as TCCR0A = 0x02; ?
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