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I want to ask if anyone have any information why Ke is equal to kt in dc motor parameters ??

anyone have referecne to read the proof for this equality

oky thank you for your reply but if you have any projects ready to know its idea and learn something from it.

Hi all,
I build a robot to control its movements forward, reverse, to right and to left manually using push buttons, but I have constant path every time I move the robot through it, so I want...

oky I will use rs485 or rs422 but is there any porjects I can find with schematics ?

Hi all,
I need your help and suggestions in this problem:
I have a robot which have two motors and a car battery, and I control its direction forward, reverse , to right and to left without any...

oky In brief Iam working on thesis which title is "Parameters Identification of Permenant Magnet DC Motor" , in this thesis I built the mosfet driver to control the speed of motor , the motor is...

after I connect the circuit, I notice that I always measure the source voltage not the motor voltage because I connect the wire from 150VDC to voltage divider then to ground, so I think I need...

thanks to all and to Nicmus for his powerfull demonstration this subject , I'm now understand it 100% and working to apply it.

Thanks alot for all for your helping , but some notes about :
1- the capacitor is't electryletic or ceramic and what is its capacitance and rated voltage.
2- I know that the ratio of R2/R3 = 30/1 ...

Thanks for all for your help and powerfull information.
I built this circuit for current and voltage sensing and I want to take your notes. then after that I can build the operational amplifier...

Thanks languer for your help, but for the unity gain amplifier is't posible to built it using voltage follower of OPAMP 741 ?

Hi all,
I need your help how to monitor voltage about 150VDC and current up to 3 Amp using PIC , with protection circuits to protect pic from damage when any problem occurs such that high voltage or...

oky I build the same circuit but without the pull down resistor and I add a 7 ohm resistor between the gate driver circuit and mosfet gate. But it's important to add a snubber circuit ?

I want to ask where I can put the flywheel protection diode across the winding motor or across (D-S) of mosfet and why , beacuse I damaged many mosfets and want to know what is the problem ?

oky so it's not preferable to use dimmer with DC motor control speed. Do you have any site or link which control speed of large dc motor ( 200VDC,300W,3A) , beacause I searched alot in google and...

Thanks Melanie for your information, I think my idea will not be suitable for my project, so when I try the dimmer switch with its analog potentiometer with my DC motor, then there are aloudy buzzing...

I want to ask if it's possible to replace the analog poteniometer of dimmer switch with digtial poteniometer to control the resistance of digital poteniometer using PIC so control the lighting or...

I need a help to this problem , I have these things :
1) ATX power supply with +5v GND GND +12V
2) a transformer from 220 to 110 and a bridge to get +110V and GND

but when I connect the two...

Thanks aratti and mister for your replies, I remove the zener after it's damaged and I'm putting the flyback diode , I know that IC drivers is better than I make a driver alone , but in our country...

return back after I run the motor on, by convert it from series to separately excited by applying about 1.5V to it's Rf and variable voltage at Ra and it's working well.

now I build a driver for a...

3A for a motor, thanks mister for your patient

I need 3A of current

oky I have A dc motor work at 110VDC , so I build driver circuits to give us variable voltage to motor , using PWM and PIC

is there any circuits to build by myself without usin atx power ?

I need your help to build power supply to get these voltage levels ( 110VDC , 12VDC , 5VDC ) , I have a transformer (220VAC to 110VAC) and a bridge to get 110VDC but after that to get 12 VDC what I...