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Brushless servo motors are those that have windings in the stator and permanent magnets attached to the rotor. No brushes are used. These servo motors provide high acceleration, high torque, and no maintenance. They offer the highest torque-to-weight ratio and can be used in the most precise, demanding applications. Brushless motors are available in both metric and imperial frame sizes, and in both slotted and slotless designs. Get in touch with us for a quote on a brushless servo motor!
Advantages of Brushless Servo Motors
Brushless servo motors offer the highest torque-to-weight ratio and offer several other advantages:
Higher Output: higher speed and torque control
Low Maintenance: the lack of brushes means that the motor’s lifetime is no longer limited by the brush’s life and there is less of a need for maintenance
Positioning Accuracy: brushless servo motors with positional sensors create a reliable closed-loop system. This ensures high accuracy and rotation repeatability
Compact Size: space saving design allows them to fit in smaller spaces
Reduced noise: operation at <50dB is typical
Improved reliability: with no brushes to replace, downtown is decreased
Because of the design of brushless servo motors, with no windings in the rotor, they are not subjected to centrifugal forces and they can be cooled by conduction. All of these factors mean that the motor’s internals can be entirely enclosed and protected from dirt or foreign debris.
Kollmorgen's brushless servomotors offer the highest torque/inertia ratio over a broad range of speeds—including high speed capabilities up to 8,000 rpm for standard designs and up to 70,000 rpm for special designs.
With a design targeted for the most common servo motor features and offering torque ranges from 0.5N-m to almost 16 N-m, VLM delivers all the torque and performance of a servo while helping you control application costs.
The KBM™ Series is designed to be directly embedded in your machine, using the machine’s own bearings to support the rotor. With a huge selection of standard motors—plus our ability to quickly and cost-effectively incorporate co-engineered modifications—you can choose an exact-fit motor that provides the highest performance in the most compact space.
The Kollmorgen TBM (Torquer Brushless Motor) Series direct drive frameless motor is designed to be directly embedded in your machine, using the machine’s own bearings to support the rotor. This series is designed for applications that require high power in a small, compact form factor with minimized weight and inertia. With a selection of standard motors—plus our ability to quickly and cost-effectively incorporate co-engineered modifications—you can choose an exact-fit motor that provides the highest performance in robotic joints, medical robotics, sensor gimbals, guidance systems and other motion-critical applications.
Kollmorgen pioneered the development of direct drive technology. Today, our Direct Drive Rotary (DDR) and Direct Drive Linear (DDL) motors bring you industry-leading performance, zero maintenance, clean mechanical assembly, improved accuracy, higher throughput, better reliability, and smooth, quiet operation.
The ElectroCraft RapidPower™ EXC and E-Series are fast, low vibration BLDC motors. By utilizing M-8 ceramic and rare-earth neodymium magnets, our BLDC motors provide the quick acceleration and consistent speed (up to 15,000 rpm) needed for applications such as centrifuges, fans and pumps. Sealed ball bearings and reduced torque ripple from skewed magnetization also ensure a smooth operation at any speed.
QTR Torque Motors from Tecnotion are extremely compact, provide an extremely stiff drive train, eliminate the need for time-consuming mounting procedures, are virtually maintenance free and can be integrated directly into the machine structure, while the spacious open inner diameter enables wire and cable feedthrough.
JVL's MAC Motor Series of integrated servo motors (up to 4500W and 13.5kW peak) include the controller, PLC, encoder, power supply and bus system integrated into one compact unit. All industrial Ethernet connectivity protocols like Profinet, EtherCAT, Ethernet / IP, Modbus TCP, Powerlink, Sercos III etc. are available. Furthermore, traditional fieldbus networks like CANopen, DeviceNet, Profibus, Nano PLC, and RS232/RS485/USB are available as options.
Nippon Pulse’s Linear Shaft Motor is a brushless, high-precision direct drive linear servo motor with a tubular design. The motor consists of a magnetic shaft and coil assembly (forcer), and is driven and controlled by the flow of current. The Linear Shaft Motor can replace ball-screws, pneumatics, U-shaped motors and other linear motion systems.
Designed and constructed with an iron core, these linear motors offer extremely high continuous force for their size, starting at 60N for the small TM, all the way up to 3000N for the water cooled TBW powerhouse. Peak forces are even higher, reaching up to 6000N.
In contrast to iron core motors, these motors feature an ironless coil unit, so there is no attraction force or cogging between the coil unit and the magnet track. This is what gives ironless motors their light weight, superior precision, a linear force constant and extremely dynamic velocity, acceleration and deceleration. Continuous force ranges from 10N all the way up to 846N with peak force of up to 4200N.
Slotted Brushless Servo Motors
Slotted brushless servo motors provide good balance between torque output, motor constant, efficiency, and manufacturability. They provide high efficiency and high acceleration rates. Slotted brushless servo motors feature benefits such as:
Better acceleration/deceleration capabilities
Lower rotor inertia
Lower cost when compared to slotless motors
Better load to rotor inertia ratio
Slotless Brushless Servo Motors
Slotless brushless servo motors are designed to optimize for smoothness and create predictable torque output. They have negligible magnetic cogging which provides improved servo performance and allows for extremely smooth motion even at low speeds. They feature:
Ability to withstand high peak torque
High power density
Increased heat dissipation
Industries & Applications
Brushless servo motors can be used in a number of different industries and applications. They are typically used in industrial positioning and actuation applications in:
Servo2Go supplies brushless servo motors from top manufacturers like:
Brushless servo motors are those that have windings in the stator and permanent magnets attached to the rotor. No brushes are used. These servo motors provide high acceleration, high torque, and no maintenance.
What is the advantage of a Brushless Motor?
Brushless servo motors offer several advantages over brushed servo motors including higher output, low maintenance and longer lifespan, positioning accuracy, compact size, and improved reliability.
What is the difference between brushless and brushed motors?
In brushed servo motors, a stator with two magnets surrounds a turning rotor. When brushed servo motor is connected to a power source, a magnetic field torque is created and the rotor turns around its axis. The flow of electric is switched with a commutator consisting of a collector and brushes. In a brushless servo motor, permanent magnets are attached to the rotor which turns around a fixed stator. There are no brushes and a special solid-state circuit is used to control the current supply to the stator.