How To Choose Brushless Motor And Esc

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What ESC to use with what motor?

The ESC can be selected based on the voltage and the peak current rating of the motor. A simple rule is to choose an ESC with atleast 5A more capacity than the peak rating of the motor, since you may be powering servos, receiver and other accessories from the ESC. Remember to always round up.

Can I use any ESC with any motor?

Short answer is no. Not all brushless esc’s are compatible with all brushless motors.

Can you mix and match ESC and motor?

For the most part, yes, you can. A few things you have to consider…in most cases, you can’t run a sensored motor on a sensorless ESC for example. Mostly you have to make sure the ESC can handle the motor wind or KV.

How do I know what size brushless motor I need?

Electric motor power is stated in watts. 750 watts = 1 horsepower. An easy way to estimate power needs for RC hobby applications is to use 100 watts per pound for sport flying, 150 for aggressive aerobatics, 200 watts per pound for 3D flying.

Does higher KV mean faster motor?

Kv describes the RPM (revolutions per minute) a motor does per Volt that is put into it. Generally speaking the more Kv a motor has, the more RPM and more power. For example, a 9000Kv motor would be faster than a 2200Kv motor. If Kv is like horsepower, then Turns is the physical attribute of a motor.

How many amps do I need for my ESC?

The ratings on an esc and battery are usualy a “max” value. If we believe the numbers then your cell is safe up to 44 amps and the esc is safe up to 35 or 60 amps.

Is a higher amp ESC better?

A high amp esc will usually have better internals than a lower amp esc. Keep tthe questions coming, you do not learn without asking! Amp rating generally means you can run a more aggressive motor (mod motors) with higher amperage. For example, the Hobbywing Justock is just a 45a ESC.

What ESC do I need for 4S?

What size ESC should i use on a 4s setup? The ESC should be a match to the motor , and both should be rated to handle 4S . I find the max amps the motor can handle and get esc over that by 20 amps. I would at least consider a switch-mode ESC or consider an external BEC.

Can a 60 amp ESC handle 3S Lipo?

A quality 60A ESC will be fine on 3S…within reason, and as stated above with weight/motor kv concerns.

How much power does ESC draw?

All ESCs comes with a rating. The Turnigy Plush ESC shown has a rating of 10A, meaning it can draw a maximum continuous current of 10A. Anything higher than 10A will eventually burn the ESC.

What size is a 540 brushless motor?

540 has a diameter of 36mm.

What is the difference between a 540 and 550 motor?

The difference between a 540 and a 550 motor is the length of the motor’s cylindrical case, or “can.” Both motors are the same diameter, but a 550 motor is about a centimeter longer than a 540.

How do I choose the right ESC?

Current Rating. The first thing to consider when selecting an ESC is the current rating or ampere rating. Input Voltage Rating. Weight and Size. ESC Firmware. With or Without BEC. Connection of ESC with motor. ESC Protocols. ESC Processors.

How do you match a battery to a motor?

The battery voltage needs to match the motor rating. The controller voltage rating needs to be the same or higher. The battery AH rating should be chosen based on the motor power rating ÷ motor voltage rating x 1hr.

How do I choose a RC boat motor?

28-29mm can size- will power most hulls up to 600mm. 36mm can size- up to around 800mm. 40mm can size- up to 1200mm as long as it’s a light brushless dedicated or abs hull. Anything over that will require 56 – 58mm motor.

Do you need an ESC for each motor?

Brushed and brushless motors both require escs, but an esc is specific to brushed or brushless. IE, you have to buy the right type. There can be a few factors in choosing the correct esc, but the biggest factor is getting a current rating somewhat larger than the motor will draw.

What is a 4 in 1 ESC?

A 4 in 1 brushless ESC allows you to move ESCs from the arms of your quadcopter into the centre stack with your flight controller. Compact builds can benefit, as they make wiring a lot simpler, removing the need for a power distribution board and separate BEC in some cases.

Are all ESC the same?

A brushless ESC is more complex than a brushed ESC, so the two types of motor are not normally usable on the same ESC. There is always a but though. The largest maker of RC cars is Tamiya and they supply an ESC with some of their kits that can be used with both types of motor, but it is very much the exception.

How many amps does an RC car use?

Around 60-80 amps. “How many Amps does a typical 540-size 4000-5000kV Brushless motor draw on 2s? I know it also depends on gearing, but gimme an idea.” Around 60-80 amps.

What is AMP in RC?

A higher amperage rating on the ESC means that it will handle more amps, which means you can run a larger pinion gear and go faster without damaging the ESC. Or you can choose a motor with a higher KV, which will also draw more current, and go faster.

How much weight can a 1400kv motor lift?

The weight of the motor is 70 grams and it can lift up to 1000grams.

How do you calculate kV to RPM?

Kv – RPM Constant To estimate the RPM of a motor, simply multiply the Kv value by the battery voltage. Kv is in units of RPM/Volt.

What is the difference between 3S and 4S lipo?

Difference between a 3S and 4S mini quad setup Obviously, the biggest difference is the voltage delivered to the motors. A 3S Lipo has a nominal voltage of 11.1V or 12.6V when fully charged, while a 4S Lipo has a nominal voltage of 14.8V and 16.8V at full charge.

Can I use a 3S battery on a 2s ESC?

Yes, it will kill it. You cant find an 11.1v 2s because 11.1v is 3s (3.7 x 3 = 11.1v). The cell rating is directly related to posted nominal voltage. Your ESC doesn’t see individual cells, and if it can run on multiple cell configurations, it figures out cell count based on input voltage.

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