BMC Motor

Electromagnetic Eddy Current Brakes are a new braking technology that uses electromagnetic principles to provide efficient and cost-effective braking performance.

BMC Motor is a specialized and renowned manufacturer and supplier of BLDC brush and brushless DC Motors. We also offer high durability and low electric noise generation.

We offer a High-Efficiency Brushless electrical system of an electromagnetic eddy current brake and Frameless Torque Motor used for a petroleum drilling machine.

This article will discuss a type of motor desirable for various precision machines and other space-constrained applications since it is both small and very efficient. When choosing a frameless torque motor for a space-constrained assembly, size, and weight will be considered. Larger and heavier motors are frequently inefficient and can restrict the design options. After all, you will want to achieve the best motor performance within the confines of the area provided and trouble-free system integration. Choosing the incorrect motor might also be expensive. 

By doing away with the motor's housing, space can be saved. Due to the removal of the housing components, which take up space and frequently cause energy losses, the rotor, and stator can now be mounted directly to the assembly. The end result is a productive system that saves money and physical space.   

What Does Frameless Torque Motor Mean?  

A frameless motor does not have a frame, housing, bearing, or feedback mechanism. Because of this, system vendors may optimize the motor for their application and lower the total cost of ownership. Two elements make up the frameless torque motor. The rotor assembly containing the magnets that provide torque and the armature assembly (stator) with windings are incorporated into a customer-specific application. The ability to design and select the bearings, shafts, housings and sensors needed for the application is a significant advantage.  

Benefits of BMC Motor  

Compact Size: There are two sizes of these frameless motors. These units feature a generous inner bore size despite their compact stature. Due to their compact design, they are simple to incorporate while maintaining lightweight and minimal assembly sizes. Clients can select an 80-millimeter OD with a 20-millimeter stack height or an outside diameter of 50 millimeters with a 14-millimeter stack height.  

High Torque Density: Compared to similar frameless motors, our motors demonstrate a higher torque constant. These frameless motors are incredibly efficient due to their high torque density and efficient conversion of electrical to mechanical power.  

Cost Effectiveness: This motor family is less expensive than other rotary motors of comparable size, and the cost advantage grows as the quantity is increased. Also, consumers save on personnel expenses and time because of their simple integration.  

More Characteristics and Details: With these advantages, our motors have low cogging torque, a maximum operating temperature of 130°C, and compatibility with both low- and high-speed windings.   

Applications of Frameless Torque Motor  

Energy production: Production of wind power  

Industry of food and packaging: Conveyor belt propulsion  

High-precision and high-accuracy technologies in robotics and semiconductor  

HVLS fans are used in industrial or agricultural fan applications.  

Machine tool: Different devices and frameworks that significantly lower prices  

Uses for servo motors  

Conclusion  

The majority of the time, electric motors are viewed as separate parts. For instance, a brushless motor from a standard cordless drill is a self-contained device that can be held in your palm and is approximately the size of a lemon. Typically, it consists of a rotor and a stator that is put together in a housing. These are typically bolted into larger machinery to give the system a rotating motion. A frameless torque motor is devoid of the casing found in conventional electric motors. However, using a frameless electric motor may be helpful in some situations. The rotor and the stator are the two principal pieces that frameless motors have in common with their conventional counterparts. The rotor and stator are mounted directly into the machine assembly in a system using a frameless motor. 

What is a Frameless Torque Motor?  

A frameless motor's rotor and stator components are integrated into a machine assembly to impart torque to a load. In order to complete the servo system, it is often integrated with additional parts such as bearings, feedback devices, housing, shaft, and other elements.  

Pros of Frameless Torque Motor  

Although frameless motors have some specific advantages for some applications, they nonetheless perform the same function as conventional electric motors.  

Efficiency  

Since frameless motors are directly incorporated into a machine's construction, they frequently have high efficiency. In a conventional motor, the bearings or mountings may result in energy loss. Frameless motors remove the sources of these inefficiencies.  

Stability  

Compared to machines powered by regular motors, frameless machines are typically more stable and durable. Furthermore, they frequently have a somewhat superior balance because of the direct integration of motor components.   

Quiet Function  

In general, each extra system component increases the potential for noise. Frameless motors are almost always quieter because they do not have some of the parts that are present in conventional motors.  

Less Maintenance Required  

Similar to the previous point, any new component that is added to a system increases complexity and necessitates maintenance. Aside from using significantly fewer parts than conventional motors, frameless motors also require substantially less maintenance.  

Applications of Frameless Motors  

When very high efficiency and minimal maintenance are necessary, frameless torque motor is frequently utilized in machine tools, centrifuges, and mixers. Robots used in collaboration are an intriguing application. A subclass of robotics called collaborative robots aids human operators in completing jobs without the need for constrictive safety barriers. Frameless motors can be utilized in the joints of a collaborative robot in place of conventional motors and gearboxes due to their strength and small size. They are unnoticeable to the operator and permit the "limbs" to move normally.  

An electric motor that works on direct current (DC) and lacks the mechanical brushes and commutator of a typical brush motor is known as brushless DC motors. Although the upfront costs are higher, it provides clear advantages over brush motors and is ultimately more affordable. Numerous trenchless construction applications use brushless motors.  

The invention of BLDC Motors  

The invention of brushless motors occurred at the beginning of the electrical age, making them much more advanced. As a result of developments in solid-state technology in the early 1960s, the first BLDC motor was created in 1962 and was known as a "DC machine with solid state commutation" by T.G. Wilson and P.H. Trickey. Since they don't need a physical commutator, brushless motors are the most popular option for computer disc drives, robots, etc.  

Advanced BLDC Motors  

Despite their endurance, early brushless motors had the drawback of being unable to produce much power. Before stronger permanent magnet materials became accessible in the 1980s, brushless motors could provide as much power as brush motors. The first large-scale brushless DC motor, with 10x the power of earlier brushless motors, was created by Robert E. Lordo in the late 1980s.  

Today's brushless motors combine higher output power, smaller size and weight, improved heat dissipation and efficiency, more comprehensive operating speed ranges, and exceptionally low electrical noise to solve many of the shortcomings of brushed motors. Because brushless motors lack electrical connections that could break, they are more reliable and require less maintenance in commercial and industrial settings.  

Critical Aspects & Design of BLDC Motor  

A typical brushless motor includes a three-phase winding in the stator and a permanent magnet inside the rotor. Additionally, single-phase, dual-phase, and three-phase versions are offered.   

The magnetic rotor is propelled forward by a rotating magnetic field created by the stator winding. The coil receives a three-phase voltage to produce this magnetic field. How does the system tell which coils should be powered and which ones are?   

For this, a certain electrical controller is used. Such an integrated commutating mechanism turns on current to orthogonal windings. Additionally, it features sensors that can locate the rotor. The most popular type of sensor employed is a hall sensor, but other types include photoelectric, inductive, and resolver.  

Benefits of Brushless DC Motors  

Brushless motors have several advantages over brushed motors, including the following:  

Brushless DC motors can operate at a wide range of speeds with step-less speed control and high linear mechanical features.  

Good middle and low-speed torque characteristics, strong initial torque, and low starting current; excellent torque characteristics.  

Good braking qualities, soft starting, and keeping the original mechanical or electromagnetic brake mechanism  

Compared to AC motors, BLDC motors feature no excitation loss, no brush friction loss, and no sparks compared to brushed DC motors.  

High maintenance-friendliness, stability, adaptability, and dependability  

Small size, lightweight, and high output  

Low noise, low vibration, smooth operation, long life, resistance to bump and vibration  

What's The Best to Choose?  

Brushless DC motors are perfect for applications that require a quiet motor. These motors employ permanent magnets, which result in reduced noise and vibration. These are made of permanent magnets that create a robust DC power system for use in products such as leaf blowers, bikes and other motorized equipment.