A Guide on What is a Brushless Lawn Mower and How Does It Work?

A Guide on What is a Brushless Lawn Mower and How Does It Work?

in News

The brushless lawnmower has been regarded as a major step forward in gardening and lawn care practice since it was introduced. Contrary to traditional brushed motor mowers, which are less eco-friendly, brushless models offer lower power consumption, enhanced durability, and reduced noise levels. This technology utilizes digitally-controlled motors that regulate the motor's speed using an electromagnetic field, thereby replacing the brushes traditionally used for speed control. It reduces friction and decreases the amount of wear and tear on the equipment, consequently leading to a longer lifespan for the mower. Brushless lawnmowers can make use of this flexibility by adjusting their power output to the tasks at hand, thicker grass consumes more power as more effort is needed to cut through whereas thin grass will mean less power and longer battery life. By integrating this smart power management, They are suitable for all landscape types and sizes, offering homeowners better service and savings in terms of cost and energy. Using a brushless Lawn Mower, however, means people address less maintenance and work with a device that provides greater longevity not to mention a more environment-friendly lawn care solution.

1. What is a brushless lawn mower?

Brushless lawn mower is a type of mower that operates on a brushless motor that is not fitted with brushes. This equipment is steadier and more durable than gasoline-powered engines that are more prone to wear and tear of some components. Conventional motors use brushes that contact the rotor, creating friction, heat, and eventually leading to wear and tear. However, in case of brushless motors magnets & an electronic controller are used to the control the motor’s speed and power without any direct contact. This type of design will reduce the amount of friction, it will allow the motor to run cooler and more efficiently. For instance, the self-adjusting cutting blade has sensors and software that control the amount of power the motor gives, enabling it to produce more power when you mow thick high grass. When grass is too easy to cut and the power needs to come down, it does it. This very economical consumption of energy not only prolongs the battery life in cordless models but also increases the motor's lifetime as it does not work all the time at full power.

2. How Do Brushless Lawn Mowers Work?

Brushless lawnmowers work by using a combination of magnets and an electronic controller instead of physical brushes to move the motor. This setup allows for the adjustment of power and speed based on the lawn's condition, making it more efficient. The motor's design reduces wear and tear, which means the mower lasts longer and runs more smoothly.

2.1 Electronic Speed Controller (ESC):

The ESC acts as the 'brain' of the mower, regulating the motor's current to control its speed and power output, enabling continuous adjustment based on cutting conditions. Through varying the motor’s current, the ESC can provide lots of torque when getting through challenges or moderate power for easy cutting, and doing so in this way makes the mower more efficient and longer lawn-cutting experience. For example, look at your lawn where you have different areas of thick, damp grass mingled with thin and brocaded areas. The brushless lawn mower, equipped with an Electronic Speed Control (ESC), can thus respond to downslopes and upslopes by controlling its speed. When it tries to bite into the muddy grass, the ESC informs the engine to add more power, enabling the cutting blades to gain the needful force capable of cutting efficiently. In dry, sparsely covered areas, the ESC can reduce power to save battery life and prevent motor wear. Although the ESC primarily works on power management, it also has some additional functions. On the other hand, it prevents overheating by regulating the flow of electricity. Overheating is a common problem in conventional motors, which may lead to the motor's failure of operation, but with an ESC, the brushless motor works properly within a safe temperature range, so the mower can run better and last longer. Along with this, this precise speed management helps in achieving a quiet run of the mower. By disengaging the throttle continuously from the engine and preventing it from running at full power for a long time, the noise is diminished significantly, hence mowing becomes more pleasurable and won’t disturb the neighbors.

2.2 Magnetic Field Rotation

The rotation of the magnetic field in brushless lawnmowers is fundamental for their operation, driving the blade's rotation through magnetic force instead of physical contact. This principle of electromagnetism is the basic idea behind this technology where a magnetic field is produced comparing the passing of current through the coils of wire. While the magnetic field created by the electricity is working together with the permanent magnet of the motor, this generates forces that will eventually cause the motor's shaft to rotate. To grasp this idea, think of mowing as a variable operation, which is dependent on the kind of grass. When the grass is thick or the cutting height is high, the ESC increases the motor's electric current. It will produce high power, consequently, the blade will have enough might to deal with thick grass. Conversely, for the grass color to be light, the mower needs less power to be used.

  1. Improved efficiency with motor consuming only required power
  2. Increased durability with no brushes to wear down
  3. Quieter operation for a better user experience
  4. Efficiency, control, and longevity from magnetic field rotation
  5. Smart choice for residential and commercial lawn care
  6. Important in today's gardening and landscaping equipment market

2.3 Blade Rotation for Cutting Grass

The blade rotation which is the worth of having a brushless lawn mower also provides a clean and even cut across your lawn. Through the application of rotational force on the mower's blades, they operate at high speeds hence cleaning and cutting the grass quickly. Take a typical lawn with different grass species and different heights. Brushless lawnmowers are designed in such a way that the blade speeds are adaptable depending on the height and thickness of the grass. The rapid adjustment of the blade rotation is facilitated by connecting the brushless motor directly to the mower's cutting mechanism through a transmission device. This direct connection ensures that any changes in the motor's speed lead to an immediate adjustment in the blade rotation. The rotary blades' effectiveness shows in the grass's clean cut. Unlike less efficient mowers that tear or cut unevenly, a brushless mower with precise blade rotation ensures a neat cut, safeguarding against damage and pests. This enhances the look of the lawn and grass growth simultaneously. Besides that, there is a safety feature implemented in the blade rotation system that helps to keep both the operator and the mower safe. For instance, if the mower hits something compact, the sensor will take the blades to stop at once or reduce their speed to avoid damage or injuries. At the end of the day, the brushless mechanism manifests how the newest technology can be used to boost the performance, efficiency, and safety of lawn care, which represents the best side of innovation in handy gardening tools.

2.4 Efficiency and Adjustment Simplified

Brushless lawnmower motors adjust automatically to lawn conditions, which makes them efficient in power usage. For example, the mower boosts power when encountering thick or wet grass patches to ensure thorough cleaning. Visualize a grass patch with water-logged and shaded areas as well as dry and hot spots. The machine gives more power in the place to cut the thicker grass, then turns off in areas where its power is not needed. Moreover, distributing power efficiently prevents excessive use of the mower. This leads to reduced damage, a longer lifespan of the device, and more uniform grass lengths.

3. What's the Difference Between Brushed and Brushless Motors Lawn Mowers?

3.1 Motor Construction and Design

Brush motors use carbon brushes to transfer power to the rotor, which can wear out over time. With this, they become easier and less costly to use but need frequent replacement of brushes and are less effective due to friction. More so, brushless motors don't use brushes at all. Rather they hold an electronic controller that modulates the current in the motor's windings so that the rotor movements are achieved without any physical contact. The result is that brushless motors are less overheated, more efficient and are more durable than brushed motors since there is no wear due to contact. This makes them much better for the mowers that are on a regular job and need to be in a good condition all the time.

3.2 Efficiency and Power Consumption

Brushless motors are one of the most efficient motor types because they can adapt their energy consumption to the changing task at hand minimizing friction loss that is typical with brushed motors. For instance, when cutting through thick, wet grass, the automatic power output of a brushless mower increases to maintain performance without the need for manual adjustment. Lighter grass means less power consumption, which is energy-saving, resulting in increased battery life. However, brushed motors burn power no matter how light or heavy the grass is, requiring extra power to overcome dense patches and draining the battery faster in better mowing conditions. Brushless motors have this adjustable torque feature that they use for different grass lengths so that less power is used, extending the battery life.

3.3 Performance and Torque

In lawnmowers, brushless motors significantly enhance cutting efficiency across various grass types due to superior performance and torque. Torque is the motor's force to spin the blades; more torque means it can easily cut through thick grass without slowing down.
Brushless motors are superior because they adjust power based on grass resistance. This means they can automatically increase torque when encountering dense grass, maintaining blade speed for a consistent cut, and lower torque in lighter grass to save battery, ensuring efficient energy use and longer motor life. Thus, brushless lawnmowers offer better performance across different lawn conditions.

3.4 Durability and Maintenance

Brushless motors offer significant advantages over brushed motors in terms of maintenance and durability. Brushless motors require less maintenance as there are no brushes to wear out. But brushed motors may require regular checking and changing of the brushes.

3.5 Heat Dissipation and Noise Levels

When you look at traditional brushed versus modern brushless motor lawnmowers, there are two important things to watch out: how well they work and how you feel using them.
Heat Dissipation: Brushless motors are efficient at converting electricity into power, which contributes to better heat dissipation and cooler operation. Unlike brushed motors that heat up from friction and contact, brushless ones run cooler, last longer, and might even let you mow more on a single charge.
Noise Levels: Brushless motors are quieter. With no brushes causing friction noise like in brushed motors, they operate much more quietly. Less noise means more comfort for you and less disturbance for the neighbors.

3.6 Cost Implications

At the beginning one may be considering brushless motors to be more expensive than the brushed ones, which is true. As an example a brushed motor lawnmower could cost to about $200 while the price could be $300 or larger for the brushless version one. Although it is a more expensive purchase price-wise, the initial higher investment can be worth it in the long run due to lower maintenance costs and longer lifespan. Their durability AND efficacy reduce the frequency of replacements and repairs. Brushed motors might be a cause for additional costs due to the brush wearing out and more frequent repair work as a result of regular use. Therefore, although brushless lawnmowers are more expensive in the beginning, they have lesser maintenance than other types and have a longer life. So, by comparing, they cost you less in the long run.

3.7 Adaptability and Control Features

A major benefit of brushless motor lawnmowers is the ability to be used on different kinds of grass. The electronic control system in brushless motors enables quick adjustments to the power and torque to adapt power and torque output for cutting grass, resulting in a quiet and efficient cutting experience. Additionally, certain models come with features such as variable speed drive, which lets you change the speed for various lawn areas or different types of grass. This freedom and control not only simplify lawn mowing but also boost the overall cutting quality.

3.8 Environmental Impact

When it comes to the environmental impact, both brushed and brushless motors play a big role in energy efficiency and lifespan.
Brushed motors, using physical brushes for electricity transfer, tend to wear out quicker, needing more maintenance.
This leads to more waste over time. Brushless motors operate electronically without physical contact, meaning it can lead to extended lifespan and increased energy efficiency. This also means reduced waste and lower long-term energy consumption. By choosing brushless motors, you minimize the need for replacements and reduce power usage, making them a more environmentally conscious alternative to brushed models.

3.9 User Experience and Convenience

Finally, Lawnmowers with brushless motors offer an excellent user experience and convenience. Brushless motors are lighter, making them easy to handle and control during mowing.

4. How Does Brushless Technology Affect Lawn Mower Performance?

4.1 Enhanced Efficiency and Power

Brushless technology enhances the efficiency, power, and durability of lawn mowers by enabling variable speed control, conserving battery life, and offering a longer lifespan compared to traditional brushed motors. With less heat and friction, brushless motors pack a punch cutting through tough grass effortlessly.

4.2 Longer Lifespan and Reliability

Brushless motor lawnmowers provide a long-lasting performance because they have fewer components that cause friction.
These energy-efficient machines also reduce the risk of overheating, providing reliable mowing for years to come.

4.3 Increase Battery Life and Runtime

Brushless motors contribute to longer battery life and run time of lawnmowers in comparison to brushed motors as they operate more efficiently. The secret lies in that brushless motors are designed to decrease the wastage of energy released in the form of heat and friction, which are usually the main pain points of brushed motors.

The study of the Energy Efficiency & Renewable Energy division of the U.S. Department of Energy suggests that these gadgets powered by brushless engines can effectively extend the lifetime of the battery by the amount "up to 30% longer" under the same circumstances than the ones with brushed motors. This means that the push mowers with the brushless motors have a longer battery life following the single charge and at the same time, they require less frequent charging.

4.4 Improved Performance Control

Brushless motors boost lawnmower performance by adapting power for different lawn situations more precisely.
They can change speed and torque on the fly, this is made possible through an electronic feedback system that adjusts speed and torque in real-time. Unlike brushed motors that keep the same speed no matter how thick or tall the grass is, brushless motors adjust automatically. They power up to tackle dense or high grass and slow down for easier mowing.
This not only means better-cutting results but also saves energy and extends battery life by using just the right amount of power.

4.5 Reduce Noise and Vibration

Brushless motor technology makes the task quieter and more comfortable by reducing noise and vibration.
This not only improves user comfort but also extends the mower's life by reducing wear on its parts. Homeowners benefit from a more pleasant mowing experience with less noise disturbance.

5. Is a Brushless Lawn Mower Right for Your Garden?

5.1 The size and terrain of a garden (flat, sloping, irregular shapes, etc.)

The size and layout of your garden influence your lawn mower choice. For small, flat yards, most mowers work well, including those with brushless motors. Brushless motor mowers are good in larger or wider terrains. In big gardens, their long battery life lets you mow without frequent stops. On slopes, they offer better control and are capable of adapting torque requirements to different inclines for uphill mowing. For irregular-shaped gardens with obstacles, they adapt well, needing less maintenance. Brushless motors are versatile and efficient for any garden shape or landscape.

5.2 Features of lawn mowers (such as adjustable cutting height, grass box capacity, edge trimming capability, etc.)

Lawn mower features greatly impact ease of use and functionality. For instance, an adjustable cutting height allows homeowners to customize grass length with a simple lever or dial. Mowers with large grass boxes reduce the need for frequent stops to empty clippings, saving time on big lawns. Edge trimming capability provides precise cuts along edges and reduces manual trimming. Mulching features chop clippings for natural lawn fertilization, meeting various lawn care needs.

5.3 Environmental Impact (reducing carbon emissions and noise pollution)

A brushless motor lawn mower leans towards a cleaner and greener experience by cutting down on carbon emissions and noise pollution. The quiet operation of brushless motors also reduces noise pollution in residential areas. A study discusses the benefits of electric lawn equipment, including brushless models, in curbing greenhouse gas emissions. This study helps to underline the positive environmental impact of switching to more efficient lawn care solutions.

5.4 Budget and Cost-Effectiveness

While the initial investment may be slightly higher than that of regular brushed motors, in the long run, brushless mowers prove to be a wise investment, saving money through reduced energy consumption and maintenance costs. 
They use less energy, need less maintenance, and can cut costs for homeowners over time. Come to think of it, you don’t have to to swap out the batteries as often thanks to their longer lifespan, saving you even more cash.

6. How to Maintain Your Brushless Lawn Mower for Optimal Performance?

  1. Sweep debris and grass clippings after every use. You might be using a soft brush or a cloth to clean the mower thoroughly. Avoid using water to clean the motor or electronic components to prevent damage.
  2. We advise you to sharpen the lawnmower blades at least once per year.
  3. Battery maintenance includes full charging before storing.
  4. Check firmware because it is the operating software that determines rotational speed and efficiency of the motor.
  5. Remove a battery for long-term storage and keep it in a cool and dry place. Consider using covers or bags to avert dust and moisture accumulation.
  6. Check that your mower does not have loose screws and tighten them if necessary. This job may require you to have tools like a socket wrench or screwdriver with you.
  7. Keep the motor vents clean from dirt, and check that the fan blades are not damaged.
  8. Take the mower to the mechanic to have them inspect the carburetor and other parts for any problems, as well as having them perform any tasks of maintenance that you may not be capable of doing by yourself.

7. What Are the Solutions to Typical Brushless Lawn Mower Issues

  1. Mower Won’t Start: In case the mower won't start, there is most likely a simple problem of a dead battery. Could it help in your case to fully charge battery next time and then try to repeat the process? Furthermore, make sure that the battery cables or dirt and rust are not corroded by bypassing them. If it is another incident like an engine or board error, it should be taken to an expert shop for a quick repair.
  2. Reduced Cutting Efficiency: In case, you check on your brushless mower and notice that it is not cutting well, it’s either the mower decks are blunt or damaged. Sharpen or replace the blades as often as needed. And for items around the blade area, you should remove any given object that is hindering the blade rotation. You will likely require utilities including slotted and adjustable wrenches to take out any interfering elements.
  3. Battery Draining Quickly: If you notice that the cordless brushless mower's battery drains quickly, remove it completely and charge it to increase its capacity. Next step is recharge that battery properly. Or the battery might have a bad connection or there is a possibility of its failure.
  4. Mower Stops Unexpectedly During Use: The problem may result from a number of factors: including overheating with the blocked vents, causing the cooling system provided to the electronics to fail or a mistake that has been made with the primary motor's settings. Routine maintenance must include checking for obstructions and removing any that found. In case these steps cant solve the issue, it is advisable to have an expert try and fix the mower.
  5. Unusual Noises or Vibrations: It can be possible that, if there are noises or vibrations you have never had, that the motor is damaged or the parts are get loose. Now discontinue operation of the mower immediately and take it to a mechanic for check-up and fixing it.
  6. Difficulty in Handling or Maneuvering the Mower: This is may be caused by a failed control board or a malfunctioning motor. A specialist is the only one who will guarantee the safety of the end-user.
  7. Connectivity Issues (for Smart Mowers): There are also have smart mowers that can be managed and monitored over a handheld device but unreliable connections might appear due to lagging Wi-Fi signal or an outdated app. If you have connectivity problems, try to get closer to your router or updating the app. If these measures fail, resort to the manufacturer for an answer.

8. What Are the Top Brushless Lawn Mower Models on the Market?

8.1 ONEVAN 4000W Brushless Electric Push Lawn Mower Foldable Trimmer | For Makita 18V Battery

The ONEVAN 4000W Brushless Electric Push Lawn Mower, you have come across a powerful and cordless tool that makes work in your yard less labor intensive and is more efficient. This motor has a brushless design, prompting seamless operation, the longest standard lifespan, and tolerance to high temperatures. It's cordless and running on a Makita 18V lithium-ion battery (one of the best battery brands in the market currently) so it is neither hassling with wires and it is portable. The device is versatile and portable, hence it can fold and fit in small spaces. It saves fuel, money, and leads to a better care for the environment. The axial head, used for multiple duties such as mowing, pruning or trimming is equipped with three different types of blades for various landscape services. Furthermore, there is an auxiliary grip that is adjustable to render more comfort and give convenience of use. Included in the package: Brushless Electric Grass Trimmer is secured including Grass Head, 9 inch Alloy Saw Blade, two Metal Mowing Blades, Carton Box, User Manual, optional Charger and Batteries (1 or 2). If you want an in-depth visualization of this product, you can refer to this video: Power Your Lawn Care Routine with ONEVAN 4000W Brushless Electric Lawn Mower


The RYOBI 80V HP 42" Electric Riding Lawn Tractor offers a 19 HP powerful engine like that of a gas one only without gas. This is because it contains brushless motors, electronics and lithium-ion batteries that are at their advanced stage of technology. It can even drive up to 2 acres on a single charge and recharges very quickly, just under two and a half hours, with the provided Hyper Charger. With this grass trimmer, noise and hassle of engine maintenance are a thing of a past. It comprises three brushless motors and a couple of extras such as the storage space installed on the front and back and the 500 lbs. carrying capacity. towing capacity, and a front and rear 2" square hitch which has the potential to fulfill chores throughout the year in terms to versatile duties. Besides, with the RYOBI Riding Mower app you can easily monitor the charge from a phone and thus add comfort and the routing features. This mower is equipped with a 5-year limited warranty and is manufactured in the USA, so it will keep up with the cutting technology and be highly reliable.

8.3 Toro 60V MAX* Electric Battery High Wheel Mower

The Toro 60V MAX Electric Battery High Wheel Mower is known for its efficiency and power. It is constructed with a durable brushless motor which is a sign of no doubt good performance and 22-inch cutting deck allows for fast work. With its nine adjustable cutting heights, it gives you the possibility to choose the one that works best for your lawn. With the exclusive Vortex Technology, you will enjoy optimal mulching performance which will give your lawn the perfect look. This mower features a battery that can last up to 40 minutes running time, perfect for covering the small to medium lawns up to 0.33 acres on a single charge. Some people, nevertheless, consider that the battery life can be reduced by some factors. Thanks to the 10-inch rear wheels its size and self-propelled system that follows your walking speed, it is easy to operate on rough terrain without harming the grass.

9. Conclusion

In the final thoughts, the brushless lawn mower is the ultimate mower from the lawn care technology area, it is characterized by efficiency, reliability, and a favorable ecological effect. Purchasing a lawnmower with brushless technology will ensure that you are operating with the best output and convenience, in addition to being an environmental champion. Either the car-lawn mowing enthusiast or the discriminating expert on top-of-the-line lawn tools, you definitely won’t be disappointed if you go for the brushless mower. That's an environmentally friendly decision with innovative lawn care incorporated.

10. FAQ

1. Is a brushless mower better?
Yes, a brushless mower is generally considered better. Brushless motors are good because they give you longer battery life and need less maintenance

2. Can you use a battery-powered lawn mower on wet grass?
No, because mowing wet grass can clog the mower, that may lead to reduced efficiency and risking damage..

3. What does a brushless grass trimmer mean?
A brushless grass trimmer uses a brushless motor because this offers smooth operation and better performance, making it a great option for yard trimming.

4. Which is better brushless or brushed motor?
Brushless motors are generally considered better than brushed ones. While brushed motors may be cheaper, the long-term benefits of brushless technology make it a better choice for lawn care.

5. Is a brushless model necessary for your needs?
It depends on your personal preferences and needs. While brushless models has advantages over traditional brushed motors, they may also be pricier if you do not have the budget. If you have a bigger lawn or needs to use your mower or trimmer often, investing in a brushless model, then you can choose this option for you.

6. Is it worth paying extra for brushless?
It depends. If you have a small yard or do not use your lawn mower frequently, a brushed motor may be enough.

7. How long do brushless motors last?
Brushless motors last much longer than traditional brushed motors - up to 10 times longer with good care. This makes them a cost-effective choice as you won't need to replace them as often. Plus, they often come with longer warranties.

8. Can you burn out a brushless motor?
Yes, brushless motors can also be worn out. They're tougher than brushed ones, but overuse and misuse can cause overheating and damage.

9. Do brushless motors lose power over time?
It depends on how the person uses the brushless motor. While the brushless motor have better technology, it is also susceptible to damage if not taken care of properly.

10. How do I know if my brushless motor is bad?
If you notice your brushless motor losing power, making odd noises, or causing vibrations, it might need some TLC. Reach out to a pro for a proper check-up and fix.