Hollow DC Motors
Description
Hollow DC motors are a type of motor characterized by their unique design, which includes a hollow shaft. This design allows for the integration of mechanical components within the geometric center of the motor, providing flexibility in various engineering applications. The hollow shaft design is often associated with frameless motors, which consist of only the rotor and stator, omitting traditional housing and other components.
Working Principle
Hollow DC motors operate on the fundamental principles of DC motor technology, where the interaction between the magnetic fields of the stator and rotor generates rotational force. The hollow shaft allows for the passage of mechanical components or cables through the center of the motor, which can be advantageous in applications requiring compact and efficient design. The frameless nature of these motors reduces size, mass, and inertia, enhancing their efficiency and flexibility.
Applications
Hollow DC motors are particularly useful in applications where space is limited and integration of additional components is necessary. Specific examples include robotic applications, where the low weight and inertia are critical, and precision instrumentation, where the ability to route cables or optics through the motor centerline is beneficial.
Advantages over other DC Motors
Hollow DC motors offer several advantages over traditional DC motors. The hollow shaft design provides greater flexibility in system design, allowing for the integration of additional components within the motor. This can lead to a reduction in overall system size and complexity. Additionally, the frameless design of many hollow DC motors results in lower mass and inertia, which can improve performance in applications requiring high precision and efficiency.
Limitations
One limitation of hollow DC motors is that they may not be suitable for all applications due to their specialized design. The absence of traditional housing and components can make them less robust in environments where additional protection is required. Additionally, the integration of components within the motor may require more complex design considerations.
Considerations
When considering hollow DC motors, it is important to evaluate the initial costs, which may be higher due to their specialized design. Operating expenses can be lower due to increased efficiency, but durability may vary depending on the specific application and environment. Accuracy is generally high, but replacement and maintenance costs should be considered, especially in applications where the motor is integrated with other critical components.
from Constar Motion Co., Ltd
24mm Hollow Shaft brushless motor. Diameter: 24mm Thickness : 14mm Voltage: 12V Max. output power : 1.6W Speed: 6400rpm. Applications: UAV gimbals and handheld gimbals. Options: Lead wires length, Shaft length, Special coils, Gearheads, Encoder, Driver. The brushless dc motor (BLDC) utilizes... [See More]
- Shaft Orientation: Hollow
- Standard DC Voltage: 12V
- Commutation: Brushless
- DC Voltage Range: 12.0
from Bodine Electric Company
24A Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. Performance at 130VDC is based on use with filtered controls (F.F.=1.0); ratings at 90 VDC are based on operation with an unfiltered control (F.F.=1.4). Gearmotors can be... [See More]
- Shaft Orientation: Right Angle; Hollow
- DC Voltage Range: 90.0 to 130.0
- Standard DC Voltage: 90V
- Output Power: 0.0435 to 0.0909
from Bodine Electric Company
33A Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. Industrial lip type seals on motor and output shafts. Ball bearings on output shaft for quietness. Permanently lubricated gearing utilizing oil for long life. Bronze gear for... [See More]
- Shaft Orientation: Right Angle; Hollow
- DC Voltage Range: 90.0 to 130.0
- Standard DC Voltage: 90V
- Output Power: 0.1250 to 0.2500
from Bodine Electric Company
33A Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. Compatible with unfiltered SCR speed controls. Industrial lip type seals on motor and output shafts. Ball bearings on output shaft for quietness. Permanently lubricated... [See More]
- Shaft Orientation: Right Angle; Hollow
- Output Power: 0.1429
- DC Voltage Range: 180.0
- Continuous Current: 0.8000
from Bodine Electric Company
33A Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. Unvented gearhousing. Industrial lip type seals on motor and output shafts. Ball bearing on output shaft for increased radial load capacity and long life. Permanently... [See More]
- Shaft Orientation: Right Angle; Hollow
- DC Voltage Range: 90.0 to 130.0
- Standard DC Voltage: 90V
- Output Power: 0.1250 to 0.2500
from Bodine Electric Company
33A7 Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. 12V, 24V, 90V & 180V (SCR Rated) and 130VDC winding options. Class F. Totally enclosed IP-40 rating. IP-44 with optional t-box or boot kit installed. Hollow shaft... [See More]
- Shaft Orientation: Right Angle; Hollow; Offset / Parallel
- Output Power: 0.3333
- DC Voltage Range: 130.0
- Continuous Current: 2.3
from Bodine Electric Company
Performance ratings of 130V models (F.F.=1.0) are based on use with filtered speed controls. 33A Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. TENV. Class F. 1-inch hollow shaft. One plastic shaft cover is included with each... [See More]
- Shaft Orientation: Right Angle; Hollow
- Output Power: 0.3333
- DC Voltage Range: 130.0
- Continuous Current: 2.3
from Bodine Electric Company
33A Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. TENV. Class “F ” insulation and ratings. Pre-seated motor brushes for optimum performance and quiet operation. Hardened steel gears for long life and maximum... [See More]
- Shaft Orientation: Right Angle; Hollow
- DC Voltage Range: 90.0
- Standard DC Voltage: 90V
- Output Power: 1/4 HP
from Bodine Electric Company
33A Motor provides high starting torque, adjustable speed, and predictable performance under a range of operating conditions. TENV. Class “F ” insulation and ratings. Pre-seated motor brushes for optimum performance and quiet operation. Hardened steel gears for long life and maximum... [See More]
- Shaft Orientation: Right Angle; Hollow
- Output Power: 0.2000
- DC Voltage Range: 180.0
- Continuous Current: 1.1
from Bodine Electric Company
42B4 BLDC motor provides high starting torque, variable speed, and predictable performance. Compatible with BLDC motor drives. TENV. Variable Speed, 130VDC, 1/2 HP, 8-pole, 120-degree commutation. Class “F ” insulation and ratings; Rated ambient temp: +40 °C. Permanently lubricated,... [See More]
- Shaft Orientation: Right Angle; Hollow
- DC Voltage Range: 130.0
- Commutation: Brushless
- Output Power: 1/2 HP
from Kollmorgen Corporation
Direct Drive DC torque motors are ideal for servo applications where it is desirable to minimize size, weight, power and response time, and to maximize rate and position accuracies. These motors provide a servo actuator that can be attached directly to the driven load. A permanent magnet field and a... [See More]
- Shaft Orientation: In-line; Hollow
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- Commutation: Brush
- Output Power: 0.0129 to 8.44
from MTC Industries & Research Carmiel Ltd.
The MDC-BL-43, especially designed for applications where high torque to volume ratio is needed, is a brushless DC motor with rare-earth/cobalt magnet rotor and Hall effect rotor position sensor. Peak torque obtained on the axis at nominal voltage of 28 VDC is 350 mNm. An important feature is its... [See More]
- Shaft Orientation: In-line; Hollow
- DC Construction: Permanent Magnet
- Commutation: Brushless
- DC Voltage Range: 28.0
from H2W Technologies
Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. The result is a... [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Output Power: 1/4 HP
from Celera Motion
The Omni Series enables OEMs to design high performance, reliable, small and lightweight systems using flexible and easy-to-integrate rotary motor components. The Omni Series is offered in a wide range of low-profile form factors with a large through hole for convenient routing of cables, optics,... [See More]
- Shaft Orientation: Hollow
- Units: Metric
- Continuous Torque: 0.3 to 775.2
- Shaft Speed: 5000
from Island Components Group
Our brushless motors are among the most advanced in our industry. DC brushless motors offer superior performance and have the advantage of reduced maintenance since there are no brushes or commutators. These motors provide solutions for rigorous applications requiring maximum performance and... [See More]
- Shaft Orientation: In-line; Single-ended; Hollow
- DC Voltage Range: 135.0
- Commutation: Brushless
- Torque Constant: 734
from Koford Engineering, LLC
Slotless design is cog free, and provides very smooth rotation and very low heat rise to avoid affecting temperature sensitive components in scientific instruments and other de-vices. Typically these motors are used to rotate optics, filters, and mirrors mounted onto the end of the motor shaft. They... [See More]
- Shaft Orientation: In-line; Hollow
- DC Voltage Range: 12.0
- Standard DC Voltage: 12V
- Gear Type: Planetary
from Kollmorgen Corporation
The RBE Series from Kollmorgen is a proven platform offering many years of direct drive motor solutions in various industries such as defense, semiconductor, machine tools, industrial automation, medical, and robotics. The frameless configuration is provided as a rotor and stator component that are... [See More]
- Shaft Orientation: In-line; Hollow
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- Commutation: Brushless
- Output Power: 0.0188 to 4.95
from MTC Industries & Research Carmiel Ltd.
The MDC-BL-95, especially designed for applications where high torque to volume ratio is needed, is a brushless DC motor, with rare-earth/cobalt magnets rotor and Hall effect rotor position sensor. Peak torque obtained on the axis at nominal voltage of 28 VDC is 5 Nm. An important feature is its low... [See More]
- Shaft Orientation: In-line; Hollow
- DC Construction: Permanent Magnet
- Commutation: Brushless
- DC Voltage Range: 28.0
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 0.2
from Celera Motion
The Omni Series enables OEMs to design high performance, reliable, small and lightweight systems using flexible and easy-to-integrate rotary motor components. The Omni Series is offered in a wide range of low-profile form factors with a large through hole for convenient routing of cables, optics,... [See More]
- Shaft Orientation: Hollow
- Units: Metric
- Continuous Torque: 0.2 to 52.2
- Shaft Speed: 5000
from Kollmorgen Corporation
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... [See More]
- Shaft Orientation: In-line; Hollow
- Standard DC Voltage: 24V; 48V; 72V; 90V
- Commutation: Brushless
- DC Voltage Range: 24.0 to 96.0
from MTC Industries & Research Carmiel Ltd.
The MTM-25-9BL is a DC torque motor that provides smooth operation without slot effect. The MTM-25-9BL provides a high accuracy in positioning, actuating, tensioning, measuring and indicating applications for both military and industrial use. Brushless operation eliminates electrical and mechanical... [See More]
- Shaft Orientation: In-line; Hollow
- DC Construction: Permanent Magnet; Coreless / Slotless
- Commutation: Brushless
- Output Power: 0.0214
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Torque Constant: 4
from Celera Motion
The Omni Series enables OEMs to design high performance, reliable, small and lightweight systems using flexible and easy-to-integrate rotary motor components. The Omni Series is offered in a wide range of low-profile form factors with a large through hole for convenient routing of cables, optics,... [See More]
- Shaft Orientation: Hollow
- Units: Metric
- Continuous Torque: 0.1 to 72.6
- Shaft Speed: 10000
from MTC Industries & Research Carmiel Ltd.
The MTM-40-9BL is a DC torque motor that provides smooth operation without slot effect. The MTM-40-9BL provides high accuracy in positioning, actuating, tensioning, measuring and indicating applications, for both military and industrial use. Brushless operation eliminates electrical and mechanical... [See More]
- Shaft Orientation: In-line; Hollow
- DC Construction: Coreless / Slotless
- Commutation: Brushless
- Output Power: 0.0335
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 0.6
from Celera Motion
Designed with ZeroCogTM ™ slotless motor technology from Applimotion, the Agility Series enables OEMs to achieve extremely smooth and highly accurate motion profiles using flexible and easy-to-integrate motor components. Ideally suited for scanning, pointing, measuring and cutting applications... [See More]
- Shaft Orientation: Hollow
- Continuous Torque: 0.4 to 120.3
- DC Construction: Coreless / Slotless
- Units: Metric
from MTC Industries & Research Carmiel Ltd.
MTM-116-11B is a direct-drive DC torque motor. It is a permanent rare earth magnet, with continuous rotation and armature excited. The MTM-116-11B have usage where very high torque to power, volume and weight ratios are needed. These applications include missile and aircraft actuators, diagnostic... [See More]
- Shaft Orientation: In-line; Hollow
- Continuous Torque: 8.8
- DC Construction: Permanent Magnet
- Rotor Inertia: 4.60E-4
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 16.6
from Celera Motion
The AgilityRH Series rotary actuators enable OEMs to achieve ultra-smooth and accurate motion profiles and conveniently route cables and other system elements via a large through hole. Built with Agility ™ direct drive motors from Applimotion featuring ZeroCog ™ technology, PurePrecision... [See More]
- Shaft Orientation: Hollow
- Continuous Current: 2.75
- Torque Constant: 5.5
- Continuous Torque: 1.4
from MTC Industries & Research Carmiel Ltd.
MTM-38-13B is a direct-drive DC torque motor. It is a permanent rare earth magnet, with continuous rotation and armature excited. The MTM-38-13B have usage where very high torque to power, volume and weight ratios are needed. These applications include missile and aircraft actuators, diagnostic... [See More]
- Shaft Orientation: In-line; Hollow
- Continuous Torque: 1.2
- DC Construction: Permanent Magnet
- Rotor Inertia: 6.00E-4
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 0.6
from MTC Industries & Research Carmiel Ltd.
MTM-54-13B is a direct-drive DC torque motor. It is a permanent rare earth magnet, with continuous rotation and armature excited. The MTM-54-13B have usage where very high torque to power, volume and weight ratios are needed. These applications include missile and aircraft actuators, diagnostic... [See More]
- Shaft Orientation: In-line; Hollow
- Continuous Torque: 2.8
- DC Construction: Permanent Magnet
- Rotor Inertia: 0.0031
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: In-line; Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 2.4
from MTC Industries & Research Carmiel Ltd.
The MLRM-2808 is a limited rotation DC torque motor with smooth operation and without slot effect. This product provides high accuracy in positioning, actuating, tensioning, measuring and indicating applications, for military as well as commercial use. The brushless operation eliminates electrical... [See More]
- Shaft Orientation: In-line; Hollow
- DC Construction: Coreless / Slotless
- Commutation: Brushless
- DC Voltage Range: 15.0
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 15.6
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 0.4
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Torque Constant: 4.18
from H2W Technologies
H2W Technologies Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. [See More]
- Shaft Orientation: Hollow
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Commutation: Brushless
- Continuous Torque: 0.6