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Recent content by gaber26111
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Help in 3 phase motor driver
hello all , i decided to use 220 acv motor, instead of that 380v, as i rethought about it and discovered that it will be very danger for such a project, if happen any mistake during operation or for the maintenance technician while maintaining or repairing the bike and it can be...- gaber26111
- Post #16
- Forum: Electric motors & generators engineering
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Help in 3 phase motor driver
Brian, the moto we have is ac motor, and the power source is batteries, so we must do the convert from dc to ac voltage.- gaber26111
- Post #12
- Forum: Electric motors & generators engineering
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Help in 3 phase motor driver
Compositepro , thanks for your opinion and help, can you send me link from aliexpress or alibaba for vfd with the specifications you talking about? All the VFD i saw were to be feeded by 220acv, can yoi show me any source for dc input? David beach. Thanks- gaber26111
- Post #9
- Forum: Electric motors & generators engineering
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Help in 3 phase motor driver
Ok. Thanks all The battery i am planning to use is 12v 200ah, ok. Good idea to use dc-dc conveter and raise the voltage to 600 dcv, then to 380acv to drive the motor. One more question i am worrying about, the battery ampere won't be too much to operate the dc-dc converter?, in other words not...- gaber26111
- Post #6
- Forum: Electric motors & generators engineering
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Help in 3 phase motor driver
Hi engineers and colleuges here, Well, i am working on project related electric bikes, in other words i am working on the driving part,and i am alittle bit confused about some stuff. We already specified a 380 acv , 7.5kw, 10 hp driver motor. Also decided to use battery bank from chloride...- gaber26111
- Thread
- Replies: 15
- Forum: Electric motors & generators engineering
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ECU firmware edit
Dear every body Glad to post here in This heavy informatoons forum and hope i get help and add to everyobe experience here. Well. I have ecu. Firmware which i need to edit and configure, in othet words customize.by locking it " so its hard to configure or customise later niether downloaded "...- gaber26111
- Thread
- Replies: 4
- Forum: Automotive electrical & sensor engineering
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DC-DC Converter
Yes it should be the problem,as you described both of your projects are the same,then it must should be the same results otherwise your breadboard miss something. Happy for you- gaber26111
- Post #10
- Forum: Circuit design
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Soldering Surface Mount Components
Hi I soldered smt components before,and alot,they made for prototypes,if you planning to do that for a product you sell at the market,then use robot or furnace for production And yes it needs very skilled technician, even through hole solder may can't solder smd components It needs heat gun if...- gaber26111
- Post #39
- Forum: Circuit design
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Voltage Divider (current not stable)
Right, thats normal, its all about the multimeter tolerance reading, if you got even more accurate multimeter it maybe not reading the 210 micro-ampere as it is and to be close to that value, but you can try more accurate So don't worry , you're so close to the readins you need, and its the...- gaber26111
- Post #8
- Forum: Circuit design
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Sizing load ratings of resisters in divided voltage circuit
hi rbrake the pump cataloge and the controller you sent were so helpful and clarified your problem more, well i add my suggestions for solving this problem you have 1- see these links with dc-dc isolated converters within specifications you need...- gaber26111
- Post #11
- Forum: Circuit design
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Electronic circuit design
well, thanks Mac and zapped for your replies Zapped, the pulses will be represented at that voltage range, of 20-450 v, at a current up to 100 micro-ampere, and no they are not milli-volts, they are pulse volts " Square wave", at very low current and their frequency will be between 4-350hz and...- gaber26111
- Post #4
- Forum: Circuit design
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Electronic circuit design
Hello engineers, my pleasure to be here in that professional engineering Forum, and seeking help from electronics Experts well, i am working on circuit design for the first time, relying on my little experience into electronics, and especially Electronic circuit design the circuit, takes...- gaber26111
- Thread
- Replies: 5
- Forum: Circuit design
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what formula gives oil temperature at a certain pressure?
No hydtools,i don't have manufacture specifications yet, i just wanted to know before i go through manufacturers if that option is exist and i can adjust the relief valve manually to open at a certain pressure and to be manually opened at operation Thanks for your help, i appreciate that- gaber26111
- Post #9
- Forum: Fluid Power engineering
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what formula gives oil temperature at a certain pressure?
Thank you all for your replies, well, i know now that there is no relation between the oil pressure and the temperature at liquids, i thought there is a relation like as the gases, but i understand now one more question please, at the same thread and not to open new one which is: i am...- gaber26111
- Post #7
- Forum: Fluid Power engineering
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what formula gives oil temperature at a certain pressure?
why it doesn't work like that at all?, may you clarify to me whats wrong?- gaber26111
- Post #3
- Forum: Fluid Power engineering
