Brushless motor amp draw Matching motor current draw: Brushless motors have a specific current draw, typically measured in amps. 5T 2/ 4300kv 9T I am running a 7. 5 brushless motor setup - offroad - So I've been trying to figure this out for awhile, searching threads, internet, etc, and not really found an answer, so thought I'd ask here. 5A and motor B is 3500kv and 2A. The Warhead Industries Base Brushless Motor like its more expensive counterpart, the black version. We relate Current Draw to Load and Dec 4, 2023 · Radio and Electronics - How to figure out brushless motor amp draw - Originally Posted by sn47som1 The goal is not for timing, thermal or heat analysis. Apr 7, 2025 · A standard NEMA 17 stepper motor can draw about 2 amps at full load. Maxj16 New Aug 3, 2022 · The smaller the size of the brushless motor, the higher the Kv. 5" propRunning on 2S and a 6A ESC, in view of Indoor flight:50% Throttle = 1. May 21, 2013 · Hiya. At 35v the amp draw is 160a and 1090 kv. The best part is, it's totally universal and designed for 12 volt systems. 5, or maybe a little less (you can't gear the bonded rotor too hard or it dies, so the amp draw is less than it would be for a sintered 10. 08 = 89. 4mm deep and the radius Jul 15, 2004 · If your amp meter is rated for 10 amps you can safely measure some of the small 280-400 size motors, but it is wise to start at minimum throttle and slowly increase throttle speed while watching your amps very carefully if your motor is capable of drawing more then 10 amps be very careful not to exceed 10 amps --- you will blow your meter Mar 20, 2008 · Thanks, fechter. This Brushless motor for Drone features a self-cooling technique that can reduce the temperature of the motor up to 30% which in turn increases the service life of this BLDC Motor. I guess then, the only non-confusing way of rating BLDC motors would be to refer to the DC side as well If this applies to the Mars PMAC then a Kelly KBL48201 (48 Volts / 120 Amps continuous) would be the right choice, I guess. Nov 7, 2021 · Hacker A10-15S 2320KV motor + GWS 7x3. You know, if an 8x4 prop with a 2200kv motor is drawing more amps than any park fly sized motor could handle, then clearly that isn't a viable option. Watt = Amps x Voltage. You can normally find the estimated current rating of a motor on the factory specs sheet. Dec 8, 2015 · It is reasonably accurate for measuring motor amp draw. Basic parameters Dec 21, 2008 · Oh yea, so to answer your question, if you keep the motor the same and change the batteries, if the motor was that 10. So which one is better? The best way I know of to answer that question would be to take them out and run practice races with each of the motors. 20mAh per shot and the peak amp draw has dropped to 20-30A. The Detrum BM2815A-1100KV motor is rated at 160 Watts max, with a suggested amp draw of 15 Amps (21 Amps Burst). For instance, a 2 HP brushless motor might draw around 20 amps at full load when operating at a higher speed. Brushless DC Motors: Brushless DC motors use electronic controllers to achieve smooth operation. So I would think to get an esc rated for 100 amps or higher? I am not very good at this stuff. A hobby type wattmeter shows amp draw, volts and watts with somewhat better accuracy. Feb 4, 2021 · (Battery mAh /1000) * C Rating = Max Amp Supply Motor Load: Motor Watts / Nominal Voltage = Max Amp Draw Let's take an example with the Turnigy Nanotech Shorty and the Hobbywing Xerun Competition 6. With its powerful 1100KV rating, this motor can deliver impressive speeds and torque, making it an ideal ch Apr 21, 2025 · For example, a 1/10 car on a 19-turn 7. While you can use a multi meter to measure the amp draw of a motor it is much easier with a tool designed specifically for the task. 5t motor: Battery Supply: (4200 mAh /1000) * 65 C (we'll take the lower number to be safe) = 273 Amps Motor Load 402 Watts / 7. Oct 12, 2006 · Speed - Electric - Brushless motor amp draw - It is nice to have a fast electric boat, but they run out of power quickly, does anyone know whear I could find a chart tha compares brushed to brussless motor amp draw, thanks, Randy. A 3. Now that I have swapped to WH brushless I’m getting 0. Jan 25, 2017 · The max current rating refers to the maximum amount of current that a motor is able to handle safely. Current draw under what conditions? Input voltage and the load will play a big part in how much current is drawn. When I was using a 22TPA brushed motor my gun clocked at 0. These EMAX Brushless DC motors are imported from original Emax products manufacturers. So if you have a motor that will do 40 amps with a burst of 45, you want a 50A ESC min. 8/. This is one of the best ways to spec out a highly efficient brushless system with lots Dec 4, 2023 · A motor analyzer will give you all this info plus more. Motor A has the advantage in the amp draw category but motor B has the advantage in the KV category. The max motor amps are is the amount of amps at which the motor can safely operate (let’s say run an hour or so without overheating). Feb 23, 2010 · The motors are rated by how many amps they can handle safely. I need to know the max amp draw from the motor at its highest level, full burst. So your motor is rated at 20 amps. Mar 10, 2017 · While static testing an airplane with an Eflite Power 25 1250KV brushless motor and 11-6 prop, we came up with a 58-60 amp current draw figure which I think is max for this motor. However, I don't know what kind of ESC to get for the brushless motor because I'm not sure how to determine my motors amp draw. 308 average amps used amps times voltage = power 3s 11. Thread starter Maxj16; Start date May 13, 2017; M. Motor is a Tmotor U12KV100. the ESC's amp rating is only there to let you know what the ESC can handle e. 7v static battery levels and then later at 14. So I jumped in head first and bought a B6d. Now to brushless: if a 3000kv motor lasts 15 minutes on 3000mAh, would a 4300kv run like 11-12 minutes? May 9, 2017 · Some additions from my notes on Brushless motors Given a specific motor size like 40x75 if one motor is 2200kv and the other 3800kv the higher KV motor will pull significantly more amperage and generate much more heat also. May 18, 2010 · Electric Off-Road - Brushless motor current draw - I am wondering what the current draw difference is between different KV motors geared to reach same speed. See full list on radiocontrolinfo. A complete set of new molds including the stator were used to produce this awesome budget friendly brushless AEG motor. A Mamba Max 7700 can draw up to 100 amps continuously and possibly up to 200 amps at peak power. The continuous current rating of a motor is the Amps that a motor can handle safely over a long period of time. 4mph 2200kv geared 45/13=34. I read that the motors amp draw is 65A constant and 100A peak. Sep 27, 2021 · Where it can sometimes be confusing is When motor A is 3200kv and 1. Apr 13, 2018 · For old-fashioned brushed motors, if a factory stock 27t runs 15 minutes on 2000mAh, you can bet that a 19t motor will run like 9-10 minutes (or less). 8 Amps100% Throttle = 4. 5). This is medium-priced high-quality Brushless DC Motors for Drone or Quadcopters. AMPs ultimately equal "Motor Heat", so you alway like to see lower AMP draw numbers as that means that motor is more efficient at higher RPMs. And then make the chart simply park fly sized motors. in addition the maximum run time May 19, 2011 · I wonder why a "800 watt" scooter has a 250 amp curtis controller in it? An electric motor will draw all the current it needs at startup, this can draw an extremely large spike of power. The manufacturer states a power output of 5500 watts. 5) brushless, and mine averaged about the same as the 13. The ESC is rated for 15 amps. This helps you estimate how long your brushless motor can run before needing a recharge. If the prop you are using causes the amp draw to exceed the max, you will burnout the motor. This tool is especially useful for engineers, hobbyists, and professionals working with electric motors. The ESC only acts like a gate and allows the motor to receive as many amps as the motor pulls, upto a certain point. Jan 25, 2014 · I know some thrust calculators include amp draw and horse power. Is there a guide to how the amp draw from motor esc + lipo works somewhere? Can someone please explain a brushless motor amp rating in comparison to the esc please. Oct 19, 2006 · If there are 60 amps going into a brushless motor, then each of the active phases would have 30 amps on them and the idle phase would have 0 amps. If you average it over time, each phase conducts for 2/3 of the time and all three conduct the same way, so considering average current, each phase would conduct 1/3 of the total input, or in your Electronic speed controllers for brushed motors are just switching voltage regulators with a small capacitor bank upstream. You can also use this utility to estimate the performance of any brushed or brushless permanent magnet DC motor if you know the Kv, the resistance, and the no-load current. I swap between 2 brushless motors. com You can use the calculator below to generate a custom chart for any of our motors at any voltage. 4v system with my current batteries at 5800Mah. Oct 3, 2024 · The brushless motor power calculator is designed to help users easily determine the input power required for a brushless motor based on its output power and efficiency. 4v = 54 Amps A motor analyzer will give you all this info plus more. g: 2030 brushless motor, 6000Kv; 4274 brushless motor, 2000Kv; Therefore, the power and torque of the motor depend on the Kv value. The meter's clamp goes around either the red or black battery power wire, NOT one of the three wires that go from speed control to a brushless motor. If that number is anywhere in the 100's, no ping battery will provide this level of power. The motor can draw more amps than the max motor amps stated in the specs. 3rd, find what amp load your prop is going to put on the motor. Here is what I do know: my stator has 12 teeth 12 turns of wire per tooth 4 teeth per phase (4 phases total) the stator is 10. 688 watts burst = average amps x 6 Sep 8, 2003 · Brushed/Brushless motors, speed controls, gear drives - How to measure amp draw of motor - Does anybody have a method to measure the amps being consumed by a motor? Multimeter in line between the battery and the motor is only good for up to 10 amps with my meter. I recall from my school days that V = IxR There is a load table for this motor. Size is the main factor that determines power and torque. 5 4700kv job, you'd find your amp draw with the 3s pack would be HUGE compared to the 2s pack. This current is measured in Amps. Oct 8, 2017 · For example, say a 5692 motor from Leopard Hobby. Radio and Electronics - How to figure out brushless motor amp draw - How can we figure out a motors amp draw rating? Im shocked not to see manufacturer ratings of this like from Tekin even doesnt list it on their site! I thought these companys used to provide amp ratings. The only way to know the amp draw is to measure it with a watt meter. They pull under 9 amps at 100% throttle. Run this Detrum BM2815A-1100KV Brushless Motor on 2-3 cell lipo and match it with an ESC of 30 Amps. E. 5 averages about 25-28 amps for a 5 minute race We ran a 'spec' sedan class with bonded rotor 4300 (10. 50mAh per shot and peak amp draw was around 60-80A (not bad really). Watts = Volts x Amps Oct 8, 2023 · AFAIK the max motor amps specs are not that relevant for comparing it with esc amp specs. May 4, 2005 · anyone know amp draw on LMH on different motors: jschick: Electric Heli Talk: 0: Aug 05, 2004 02:13 PM: Amp draw on a brushless motor: RookieOne: Electric Power Systems: 7: Jul 17, 2003 08:19 PM: Are There Any Books On Brushless Motors & Controllers? hulbear: Electric Power Systems: 3: Feb 14, 2003 10:37 AM: Max Amp Draw on GWS Motors: bmizes In this video we look at how to calculate the current draw of an RC airplane, boat or car by imputing just a few parameters. Oct 9, 2019 · Just to be clear when a manufacturer says a motor is rated for 30 amps, that’s a number not to exceed. . May 14, 2017 · Does anyone know how many amps a mt2204, 2300kv emax brushless motor draws on a 6045 prop? Amp draw. Jun 19, 2020 · i am asking as I am trying to determine draw for a VRX-branded 3660 3000KV brushless motor. A giant 2200kv inrunner running 6s+ on a 1/8 buggy or speed run car could draw 100+ amps. Do a search for "RC Watt Meter". The brand Emax is known for quality-oriented product manufacturing in the market. The motor draws amps based on the load put on it. Was Designed from the ground up with offering the most cost effective price point in mind. The "Motor Efficiency Test" portion of the analysis, will show what motor may be more efficient on power when you compare the AMP draw. Should esc be of a higher rating or lower rating than the motors amp draw? I have this Hobywing motor (2200kv sd) which has no Nov 23, 2024 · For instance, a 10-amp-hour (Ah) battery can deliver 10 amps for one hour or 1 amp for ten hours. The equations are from the forum linked below Mar 20, 2011 · 2nd put a ESC in the plane that will handle the max amp load for the motor. example losi 8 aiming for 35mph running 4s lipo 1350kv geared 45/21=34. 5v with the engine running. 1v x 8. 2166666666666667 = 8. These Brushless fans are lightweight, low-profile, no amp spikes, and create cooling unlike anything out there. Brushless ESCs are also three-phase inverters that dynamically adapt the phase and frequency to match the motor rotation. THE BRUSHLESS FAN REVOLUTION IS HERE! PROFORM's new brushless motor electric cooling fans deliver more CFM than than the competition for MAXIMUM COOLING. The setup is going in a 2wd THE BRUSHLESS FAN REVOLUTION IS HERE! PROFORM's new brushless motor electric cooling fans deliver more CFM than than the competition for MAXIMUM COOLING. 4v can draw about 11-12 amps when measured statically. The Warhe Jul 14, 2022 · Yes you want to measure the amp draw with the prop installed. You use a wattmeter to pick a prop that the motor will handle without going over the 20 amp draw. 8/(780/3600) = average amps 1. In many tests I found a brushless fan spins faster and pushes more airflow with LESS AMPERAGE DRAW when used at HIGHER voltage levels. A motor analyzer will give you all this info plus more. 8 Amps Mar 10, 2010 · Batttery amp hours /(run time in seconds /3600) Burst is usually 6 to 8 times the average amps. The ESC needs to be over the rating of the motor by at least 20%, so the 30 amp would work fine. A lower timing can draw as little as 3-4 amps and a higher timing will pull 6-7 amps although thats towards end of the performance window. Higher end manufacturers dont really list it if their motors have adjustable timing. Using a brushless motor amp draw calculator can help determine the optimal amp draw for a specific motor and application. 7mph These two setups make the same speed but what difference Mar 18, 2017 · Electric Off-Road - the amps, the amps! - Hello guys just getting back into the hobby after a long time gone. 308 8. At 29 volts the amp draw is 180 for a kv of 1340. g. Heat and motor rpms are the limiting factor. If you use a smaller prop, the amp draw will go down. Jan 21, 2010 · So i would like to estimate what sort of amperage my motor will draw so i can get a better idea if i will use the battery performance i will be paying for. 5 I also bought a motor analyzer to help dial in my motors the problem Im having is I cant find ANYTHING Nov 21, 2007 · In 4wd sedan, my sintered rotor 13. The current rating is influenced by factors such as load and speed. To calculate flight time: capacity / amps = flight time Example #1: Assume 40 amp draw measured and a 3000mah battery May 20, 2006 · Brushless motors that we use in the hobby are DC brushless motors, the ESC for a brushless puts out pulsed DC, the timing of those pulses thru the windings is called electronic commutation. 5 turn motor can draw 120 amps with an output of 600 watts, but the same motor can draw over 220 amps depending on how it is driven and the load. Nov 28, 2017 · Electric Off-Road - 17. Therefore, large-sized cars use large-sized motors with higher voltages. Im looking to run modified off road with a trinity monster 8. The calculator takes into account the motor’s voltage, Kv rating, resistance, and other parameters to calculate the expected amp draw. 4th, get a Watt Meter, there cheap. The Here is part 2This is a simple test for measuring the amp draw of this motor on this video i was using a 5030 prop on the XXD 2200kv brushless outrunner m Jun 28, 2005 · How to measure amp draw of brushless motor? patrick181: Electric Power Systems: 7: May 22, 2006 06:56 AM: How do i measure amp draw? moocowfish: Electric Plane Talk: 5: Aug 25, 2004 06:39 PM: How do I measure Amp draw? buzzbee: Beginner Training Area (Aircraft-Electric) 5: May 23, 2004 11:40 AM: How can i measure amp draw? Mike Palko: Sport On the manufacturer's website, the current draw for this motor when it's producing 13392 grams of thrust is 52 amps at 2092 Watts of power given a 40 Volt Supply. The wires are thicker, they draw more amps, so it makes sense. At 50 volt, the amp draw is 110 for 730kv. Test to measure Amp draw for the EMAX 2213 935kv Brushless Motor. Horsepower of an electric motor can be calculated by the rated current draw multiplied by the voltage of the battery. This is the RS2205 2300KV Brushless DC Motor for the QAV250 QAV300 Racing Drone. We like to introduce you to Emax Motor with high-performance Race Spec series EMAX RS2205 KV2300 Brushless DC Motor for FPV Racing Drone. Velineon 380 out of my MERV 1. Example my 3s pack is 1800mah, it last about 13 min. How much difference can we expect in actual flight? May 17, 2021 · In this video we unlock the reasons why predicting the current draw for RC cars is much more difficult then RC Airplanes. A 2200kv crawler motor in a crawling application on 3s could be drawing less than 10 amps. Apr 4, 2025 · I began testing brushless fans at 12. how are we supposed to properly spec out a Biggest surprise was how much more efficient the brushless motors are. You can over amp ANY motor with a prop that is too big. . 100 amps, and if you exceed that, the ESC might be damaged etc. Suggestions/help would be appreciated. However before buying anything - join a Facebook group like "FPV builders" and ask what everyone us using - what is bullet proof for a 16x16 setup. 2-8. 1/ 6000kv 5. That all makes sense to me, a 4800kv 2435 specifies a 24A max draw, and a 3300kv 3650 estimates a ~60 amp max draw, perfect for their corresponding ESC's. So by the numbers your fine. It sounds like you're looking at a brushless motor, so a brushless ESC is mandatory for any operation. Feb 26, 2023 · Most 1/16th scale ESC's recommend 24mm size motors and max out around 25-30 amps, and 1/10th scale ESC's recommend 36mm motors and offer 50-60 amps. This idea that they are 3 phase ac motors keeps comming up, if one has any doubts that they are DC motors, just Google on DC brushless motors and there is a Jun 12, 2023 · Electric Off-Road - ESC for traxxas velineon 3500 - Hi, I need help figuring out what size esc to get for a Traxxas Velineon 3500. Nov 23, 2019 · I am putting together a brushless motor kit and am almost finished. I could use the amp draw and horse power to determine a motor size. The BMS will be maxed out and not provide power. Equipment: Motor: EMAX MT2213 935kv brushless motor; Propeller: EMAX 1045 (10x4. 5);ESC: How to calculate full load current in amps for direct current motors provided by Elliott Electric Supply, a wholesale electrical distributor supplying everything from light bulbs and dimmers to PLCs and Industrial Automation equipment. xmkmmx iuqru kpsqe xxw bgkkv wuwb ynrqs qhs tomwousg obcnykf