Recent content by dave226

Homework Statement I am planning to use a Li-ion battery running my 4 small pmdc motors rated at 24V and 0.5amps. Is 24V 10Ah battery enough to provide sufficient power to run my application? There is a current controller which is rated at 3amps and voltage upto 44V. I want to restrict the...

Hey thanks for your concern. I searched for pmdc brush motors with integrated gearboxes. Well I believe that for such motors which i mentioned high torque application result in lower rpm availability. I believe my calculations are perfect and i am looking for wheelchair application. I said that...

Well l am controlling the torque so speed is not concerned much, finding a motor based on its dimensions and the torque as i mentioned above is required. RPM around 60 would be fine for me. I tried global spec, only Anaheim Automation suited me, but it's dimensions are not matching mine. Thanks!

Hey Thanks Berkeman!

Hi, I am looking for 12V pmdc brush gearmotor either having rated torque of 3.3 N-m or a rated torque of 5N-m (preferable). I founded certain matching specs on Anaheim Automation but the motor seems bulky (around 1.7kg) and have a length of around 17 cm. I need something lesser than or around...

Hey thanks for replying! Phark! along with the acceleration and velocity curve with respect to time, my major concern is "to plot the torque curve with time", I have initial torque required (i.e of acceleration) say of around 40N-m, I have torques available for climbing uphill and clearing...

Hey rbj and Phrak thanks for the suggestions! rbj, you suggested to consider the rolling resistance and the aerodynamic drag, that is fine but i think that along with these factors i also have to consider the kinetic energy of my vehicle (here i am talking about the designing of a power...

Hi, A normal query regarding moviement of the wheel of an EV. In the designing of an EV, I calculated the torque required to pull the wheel of my EV on normal surface as T=F*r (keeping in mind friction and other factors too),where 'r' is the radius of the wheel. Similarly, I calculate the...

Thanks for the help No Time. Well I am particularly looking for controlling the torque of bunch of small DC motors operating in parallel, with a torque of say 5N-m for each small motor. I am also looking for some idea to control these motors using Hbridges in the cheapest and non bulkier...

Hi, I am designing a small EV and I am looking forward to some guidlines regarding designing of H-bridge (torque) controller for controlling somewhat in between 6-8 permanent magnet brush DC motors , the overall power required from these motors is between 70 to 250 W, where 70 W is for...

PS: I am planning to operate these bunch of pmdc brush motors with a 12V supply

Hi, I am designing a small EV and I am looking forward to some guidlines regarding designing of H-bridge torque controller for controlling somewhat in between 6-8 permanent magnet brush DC motors , the overall power required from these motors is between 70 to 250 W, where 70 W is for normal...

thanks a lot xez! :)

Hi just wondering if anyone could provide me the way or formula for finding force required by a wheelchair having wheel of radius 'r' to climb an obstacle having height 'h'... any help would be of great help. Thks!

Great thanks to XEZ, ur posts helped me out of the problems which i had. thks once again.