@Colrman Benson The rated current is 3.17 A. I would like to use it for an hour. Also, I want to find rechargeable battery
@Gulzat You would need at minimum a 12V, 3.17Ah battery. However, with inefficiencies etc., itās best to opt for a 5Ah battery with at least 1C discharge rate.
I appreciate your effort sirā¦I want to buy 4 dc motors each have a max voltage of 170v each and a continuous current of 500ampā¦so I want to ask how many voltage is required to get maximum RPM from the 4 dc motor??? Is it 170x4 dc motor=680volts???
@Chuks nelson Youād need to either contact the manufacturer or test it by applying increasing voltage. No, each motor needs 170Vm so you would need 500 x 4 = 2,000A. Note that the motor on a Tesla (the car) operates at 375V and is around 285,000W (therefore under maximum power would consume 760A. If you are making a mobile platform (or car?) with four 85kW motors, youāre making something even more powerful than an S60 Tesla. Your R&D costs are likely going to be in the $100k range.
thanks for the article sirā¦ My basic question is how do a battery of 12v, 35 amp runs a motor of 12v, 90amp ?
@akshay sharma The battery needs to be able to discharge at 90A. This often relates to the āCā rating. If the capacity if 35Ah, and (for example) itās rated for 3C discharge, it would be able to discharge at 3x35A = 105A. Again, you need to check the rating of your battery.
sir,I am using 4 12v dc motors,each needs 2amps and 4 16kg-cm servomotors,each needs 2amps and operating voltage 7.2v@16kg-cm and 3 35kg-cm servomotors,each needs 3.5amps and operating voltage8.4v.
Now,i have selected to use one 12v 7.2ah battery for 4 dc motors and one 9v,3.7ah li-po battery for the 7 servomotors(because it has 5c current rating as you said).
Now,i want to know,is that power source is ok for my requirements?
@Thirumalaivasan We would actually need a few more details. Can you create a new topic on the RobotShop Forum and give us more of an idea of the project, and provide links to the products?
Hi. I am using a micro controller that consumes 50mA, a dc brushed motor that consumes 0.4A when working and a fan consuming 0.4A. The motor only works for 40seconds in an hour. I am planning to use 8AA batteries because I need 12V to run all the things. Can you tell me in how much time will the batteries run out?
@Dhananjaya Pande You need to know the capacity of the batteries (if they are 1.5V AA, they can be from 0.5A to ~1.5Ah). Get a sense of how much current will be consumed each hour (A) and divide the capacity by the hourly current draw.
Hiā¦I am assembling a RF micro controller circuit/Unit to control 2 servo motors which are 7.2V each.
I am in the stage of purchasing Batteries and also the adapter to charge them.(my first ever attempt in a DIY gadget)
So I have chosen to use a 7.4v 2200mah Li-Ion Battery (2x3.7v)
I am currently not sure of the adapter/charger to useā¦'mahāwise.
There is one available which is 3000 mah (intelligent charger- 8.4V 3A AC DC Power Supply Adapter Charger For 7.2V 7.4V 8.4V 18650 Li-ion Li-po Battery).
The input voltage of the circuit board: 7.4V
The input current of the circuit board: 2-4A
I am not sure if I can use a 3A charger for charging a 2.2A, 7.4v Li-ion battery. I read about the battery either the battery dying early or exploding is the amps are moreā¦Is that true?
Would you please explain and guide me regarding the appropriate choice of charger hereā¦
Also please advice if the correct battery has been chosen.
Thanx a lotā¦
@Chandan Kowli Can you create a new topic on the RobotShop Forum and provide a link to the battery pack as well as the potential chargers? You can use the same text that you used here.
Sir Can I run 7.5V RC car with 11.1V 25C Lipo battery. I tried it and found the wheels rotating at great velocities. But Iām afraid it would burn the Motors
@abu It really depends on the motors themselves and if they tolerate 11.1V. To know for certain, youād need the specifications of the motors, which is not always available. Hard to give an answer.
I am makingā a BB8 DROID which is from The Star Wars - Force Awakens , movie .
It includes- Arduino Uno, Bluetooth module, motor driver which will control powerful dc motor of 4 to 5 kg-cm . Then which battery should be used in this project
@Tejas Many batteries would work - you need to know the continuous current draw of your motor, and its nominal voltage, and then determine the max weight you can add, and see what batteries are in this range.
Hi,
Thank you for putting this together!
I am designing a robot for use in my class. It has four of these: https://www.robotshop.com/en/6v-285-rpm-gearmotor-w-encoder.html driving these: https://www.robotshop.com/en/mecanum-wheel-set.html. Iām using two of these drivers: https://www.robotshop.com/en/10a-5-30v-dual-channel-dc-motor-driver.html, and controlling the whole thing with an Arduino Mega. Iāve been testing it with a 6V 4.5Ah lead acid battery (https://www.amazon.com/Rhino-SLA4-6-4-5Ah-Sealed-Battery/dp/B00G5GXY4C), but gosh, is it heavy! Can you recommend a battery (or two) that I could use to adequately power this robot while saving weight?
BTW, I also plan to mount a claw using 5 of these: https://www.robotshop.com/en/hitec-hs422-servo-motor.html. Iām planning on using a separate power source for the claw. Would a 6V pack of four AA batteries suffice for just the arm? Can I power the motors and the arm with one source? If so, what do recommend?
Thanks!
@Patrick Lead acid is some of the heaviest battery tech you can choose. A lighter option would be 6V NiMh pack. A 7.4V LiPo might be out of the voltage range of the motor. Be sure to choose one which can discharge at 5A continuous (or more). You can use the same 6V battery pack to power the 422.
HI MR coleman
i have already worked on maintenance project with robot ,and itās battery has been damaged it was with 24v 17ah rechargable and canāt find it because it was designed special for that robot ,now i do another one by using ni-mh 1.2v 9ah but it go to be damage also.
i asked what about li-ion battery type i think itāll be more compatible for use than ni-mh type ?
@ahmed maher, Itās important to understand the limits of the Li-Ion batteries. One of which will be the constant monitoring of voltage and to cut the supply if you go bellow a certain point. It also require individual cells balance and charge.