Welcome to another exciting blog post where we will delve into the world of brushless sensorless motors. A sensorless brushless motor, as the name suggests, operates without sensors and relies on the electronic speed control (ESC) to figure out the necessary information for optimal performance. In this article, we will discuss the five key advantages of sensorless motors, highlighting their impact on cost, size and weight, durability, performance, and power output.
Sensorless Advantage #1: Cost Savings
A significant advantage of a brushless sensorless motor is their lower cost. By eliminating the need for sensors, manufacturers can reduce the production expenses associated with purchasing, installing, and accommodating these additional components. Consequently, sensorless motors are more affordable compared to their sensored counterparts. This cost-effectiveness makes them an excellent choice for budget-conscious individuals.
Advantage #2: Size and Weight Optimization
Sensorless motors offer a considerable advantage in terms of size and weight optimization. Unlike sensored motors, which require additional space to accommodate sensors, sensorless motors can utilize the entire length of the motor for the components that generate power. This advantage becomes crucial for radio-controlled vehicles with limited space. Additionally, eliminating the sensors also reduces the weight of the motor, further enhancing performance and maneuverability.
Advantage #3: Increased Durability
The absence of internal sensors in sensorless motors contributes to increased durability. Since there are no sensors to worry about, the risk of damage due to water exposure or impact is significantly reduced. In sensored motors, moisture or physical damage can render the sensors ineffective. Of course damaged sensors would then affect the overall performance of the motor. With sensorless motors, users can enjoy a more reliable experience, particularly if their vehicles are subjected to rugged conditions or high-impact situations.
Advantage #4: Optimal Performance
Sensorless motors excel in delivering ideal performance in a specific range. While sensored motors offer advantages at lower speeds, once a sensorless motor surpasses a few thousand RPM, the sensors become redundant. In fact, sensorless motors operating in sensorless mode are often more efficient than their sensored counterparts. The electronic speed control allows for variable timing, enabling the motor to adapt to different loads and speeds. This flexibility optimizes performance throughout the motor’s operational range, offering users the most efficient and effective power output.
Sensorless Advantage #5: Increased Power Output
Brushless motors with no sensors can potentially deliver greater power output compared to sensored motors of equal size and weight. This is due to larger rotor section within the motor, enabling it to generate more power for its size. The advantage is particularly valuable in the realm of radio-controlled vehicles, where space is limited, maximizing power within a small footprint is crucial for optimal performance.
Some Additional Thoughts
Sensorless motors are generally the go to type used in many different applications. These types of motors can generally be used without penalty in RC Airplanes, Drone and boats. I would recommend this type of motor if you are considering which motor type is best suited for your application. If you are wondering about 5 reasons to use sensored motors, follow this link.
Conclusion
Brushless sensorless motors offer several advantages over their sensored counterparts. These include cost savings, size and weight optimization, increased durability, optimal performance, and increased power output. Whether you’re an RC hobbyist on a budget, looking for a compact and powerful motor, or seeking durability in rugged conditions, sensorless motors provide a compelling solution. With their versatility and performance benefits, it’s no wonder that sensorless brushless motors have gained popularity among enthusiasts in the radio-controlled vehicle community.