China factory Kah-20cl3ne AC Servo Actuator Premium Quality Harmonic Drive Actuator Joint Actuator Motor for Robot vacuum pump electric

Product Description

Product Description

Hollow shaft rotary actuators

                                                                                           KAH series hollow shaft rotary actuators
Main features

1.KAH series hollow shaft rotary actuator provides large-torque and high-precision rotary actuation. With integrated design, processing and assembly technique, it is provided with high precision speed reducer, framework torque motor, hollow shaft high resolution absolute encoder, brake and intelligent sensor.
2.It provides high torque output and torque density, for example, the torque of KAH-40 rotary actuator can reach 800N·m.
3.The positioning precision of rotary actuator is within 30 Arc sec.
4.An internal through hole is set to facilitate threading wires, gas pipe and laser beams and simplify system structure.
5.Dozens of product models are provided to meet diversified needs, and the products with 220 VAC, 110 VAC and 48 VAC voltages are available.
6.The high protection grade (IP67) makes the product applicable to severe working environment.
8.It can be used by matching with KDE series EtherCAT bus servo drives to realize ultra-low vibration controland reliable and stable operation. It provides an integrated drive control solution.


The products have been widely used in such fields as electronic and semiconductor equipment, precision machine tool, factory automation systems, precision laser processing device, LED equipment, detection device, medical apparatus and instruments, robot and special mechanical arm, printing machinery, spray painting equipment, glass processing equipment, precision measuring instrument and other fields.




KAH-20  encoder Specification parameter
Series KAH-20
Model KAH-20 20A 20B 20C 20D 20E
Deceleration ratio 1:51 1:81 1:101 1:121 1:161
Maximum torque starting &stopping(N·M) 69 91 102 108 113
Instantaneous maximum torque(N·M) 42 58 61 61 61
AC voltage 220VAC Maximum speed RPM 119.6 75.3 60.4 50.4 37.9
Rated speed RPM 60.8 38.3 30.7 25.6 19.3
Maximum current Arms 4.53 3.89 3.41 2.78 2.21
Rated current Arms 2.12 1.85 1.56 1.3 0.98
Torque constant N·M/Arms 19.81 31.35 39.10 46.92 62.24
Motor phase resistance Ohms 2.135
Motor phase inductance mH 3.869
Motor Back EMF Vrms/kRPM 30.66
AC voltage 1100VAC Maximum speed RPM 100 63.0 50.5 42.1 31.7
Rated speed RPM 60.8 38.3 30.7 25.6 19.3
Maximum current Arms 9.49 7.87 7.08 6.25 4.91
Rated current Arms 4.28 3.72 3.14 2.62 1.97
Torque constant N·M/Arms 9.82 15.61 19.45 23.32 31.04
Motor phase resistance Ohms 1.036
Motor phase inductance mH 1.684
Motor Back EMF Vrms/kRPM 14.79
AC voltage 480VAC Maximum speed RPM 78.4 49.4 39.6 33.1 24.8
Rated speed RPM 60.8 38.3 30.7 25.6 19.3
Maximum current Arms 17.89 18.86 13.33 11.79 9.27
Rated current Arms 10.88 12.03 7.97 6.66 5.03
Torque constant N·M/Arms 3.86 4.82 7.65 9.16 12.19
Motor phase resistance Ohms 0.262
Motor phase inductance mH 0.313
Motor Back EMF Vrms/kRPM 7.98
Absolute Encoder Encoder Type Hollow absolute multiturn encoders ,Single-loop 19,22or24, multiturn16
Encoder resolution Motor(1time)rotation 219(524,288),222(4,194.304)or224(16777216)
Motor multiple rotation counter 215(65.536)
Incremental Encoder resolution Hollow incremental encoder,40000impulse/rpm(4 time signal)
encoder Output shaft resolution pulse/rev 2040000 3240000 4040000 4840000 6440000
uniderection positioning accuracy Arc Sec 60 40 40 40 40
Bidirectional positioning accuracy Arc Min 2 1.5 1 1 1
Overturning stiffness ×104 N·m /rad 22.5 27.3
Torsional stiffness ×104 N·m /rad 1.8 2.3
Moment of inertia without Brake Kg*m2 0.19 0.57 0.86 1.23 2.18
with Brake Kg*m2 0.22 0.63 0.95 1.35 2.35
Weight without Brake Kg 2.2
with Brake Kg 2.5
Motor Grade 16
Motor insulation Heat resistance grade :F(155ºC)
Insulation resistance:above200MΩ(DC500V)
Dielectric Strength:AC1500V/1min
Protection grade Fully closed self cooling type(IP65/IP67 degree)

/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

Application: Motor, Machinery
Hardness: Hardened Tooth Surface
Installation: Vertical Type
US$ 3000/Piece
1 Piece(Min.Order)


Order Sample



.shipping-cost-tm .tm-status-off{background: none;padding:0;color: #1470cc}

Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

servo motor

Are there common issues or challenges associated with servo motor systems, and how can they be addressed?

Servo motor systems are widely used in various applications, but they can encounter common issues or challenges that affect their performance and reliability. Let’s explore some of these issues and discuss potential solutions:

1. Positioning and Tracking Errors:

One common challenge in servo motor systems is positioning and tracking errors. These errors can occur due to factors such as mechanical backlash, encoder resolution limitations, or disturbances in the system. To address this issue, careful calibration and tuning of the servo control system are necessary. This includes adjusting feedback gains, implementing feedback filtering techniques, and utilizing advanced control algorithms to improve the system’s accuracy and minimize errors. Additionally, employing high-resolution encoders and backlash compensation mechanisms can help enhance the positioning and tracking performance.

2. Vibration and Resonance:

Vibration and resonance can impact the performance of servo motor systems, leading to reduced accuracy and stability. These issues can arise from mechanical resonances within the system or external disturbances. To mitigate vibration and resonance problems, it is crucial to analyze the system’s dynamics and identify critical resonant frequencies. Implementing vibration dampening techniques such as mechanical isolation, using vibration-absorbing materials, or employing active vibration control methods can help minimize the effect of vibrations and improve the system’s performance.

3. Overheating and Thermal Management:

Servo motors can generate heat during operation, and inadequate thermal management can lead to overheating and potential performance degradation. To address this issue, proper cooling and thermal management techniques should be employed. This may involve using heat sinks, fans, or liquid cooling systems to dissipate heat efficiently. Ensuring adequate ventilation and airflow around the motor and avoiding excessive current or overloading can also help prevent overheating. Monitoring the motor’s temperature and implementing temperature protection mechanisms can further safeguard the motor from thermal damage.

4. Electrical Noise and Interference:

Electrical noise and interference can affect the performance and reliability of servo motor systems. These issues can arise from electromagnetic interference (EMI) or radio frequency interference (RFI) from nearby equipment or electrical sources. To mitigate electrical noise, proper shielding and grounding techniques should be employed. Using shielded cables, ferrite cores, and grounding the motor and control system can help minimize the impact of noise and interference. Additionally, employing filtering techniques and surge protection devices can further improve system robustness against electrical disturbances.

5. System Integration and Compatibility:

Integrating a servo motor system into a larger control system or automation setup can present challenges in terms of compatibility and communication. Ensuring proper compatibility between the servo motor and the control system is crucial. This involves selecting appropriate communication protocols, such as EtherCAT or Modbus, and ensuring compatibility with the control signals and interfaces. Employing standardized communication interfaces and protocols can facilitate seamless integration and interoperability. Additionally, thorough testing and verification of the system’s compatibility before deployment can help identify and address any integration issues.

6. Maintenance and Service:

Maintenance and service requirements are important considerations for servo motor systems. Regular maintenance, including lubrication, inspection, and cleaning, can help prevent issues related to wear and tear. Following manufacturer-recommended maintenance schedules and procedures is essential to ensure the longevity and optimal performance of the motor. In case of any malfunctions or failures, having access to technical support from the manufacturer or trained service personnel can help diagnose and address problems effectively.

By being aware of these common issues and challenges associated with servo motor systems and implementing appropriate solutions, it is possible to enhance the performance, reliability, and lifespan of the servo motor system. Regular monitoring, proactive maintenance, and continuous improvement can contribute to optimizing the overall operation and efficiency of the system.

servo motor

Are there different types of servo motors, and how do they differ?

Yes, there are different types of servo motors available, each with its own characteristics and applications. The variations among servo motors can be attributed to factors such as construction, control mechanisms, power requirements, and performance specifications. Let’s explore some of the common types of servo motors and how they differ:

1. DC Servo Motors:

DC servo motors are widely used in various applications. They consist of a DC motor combined with a feedback control system. The control system typically includes a position or velocity feedback sensor, such as an encoder or a resolver. DC servo motors offer good speed and torque control and are often employed in robotics, automation, and hobbyist projects. They can be operated with a separate motor driver or integrated into servo motor units with built-in control electronics.

2. AC Servo Motors:

AC servo motors are designed for high-performance applications that require precise control and fast response times. They are typically three-phase motors and are driven by sinusoidal AC waveforms. AC servo motors often incorporate advanced control algorithms and feedback systems to achieve accurate position, velocity, and torque control. These motors are commonly used in industrial automation, CNC machines, robotics, and other applications that demand high precision and dynamic performance.

3. Brushed Servo Motors:

Brushed servo motors feature a traditional brushed DC motor design. They consist of a rotor with a commutator and carbon brushes that make physical contact with the commutator. The brushes provide electrical connections, allowing the motor’s magnetic field to interact with the rotor’s windings. Brushed servo motors are known for their simplicity and cost-effectiveness. However, they may require more maintenance due to brush wear, and they generally have lower efficiency and shorter lifespan compared to brushless servo motors.

4. Brushless Servo Motors:

Brushless servo motors, also known as brushless DC (BLDC) motors, offer several advantages over brushed motors. They eliminate the need for brushes and commutators, resulting in improved reliability, higher efficiency, and longer lifespan. Brushless servo motors rely on electronic commutation, typically using Hall effect sensors or encoder feedback for accurate rotor position detection. These motors are widely used in robotics, industrial automation, aerospace, and other applications that require high-performance motion control with minimal maintenance.

5. Linear Servo Motors:

Linear servo motors are designed to provide linear motion instead of rotational motion. They consist of a primary part (stator) and a secondary part (slider or forcer) that interact magnetically to generate linear motion. Linear servo motors offer advantages such as high speed, high acceleration, and precise positioning along a linear axis. They find applications in various industries, including semiconductor manufacturing, packaging, printing, and machine tools.

6. Micro Servo Motors:

Micro servo motors are small-sized servo motors often used in applications with limited space and low power requirements. They are commonly found in hobbyist projects, model airplanes, remote-controlled vehicles, and small robotic systems. Micro servo motors are lightweight, compact, and offer reasonable precision and control for their size.

These are some of the different types of servo motors available, each catering to specific applications and requirements. The choice of servo motor type depends on factors such as the desired performance, accuracy, power requirements, environmental conditions, and cost considerations. Understanding the differences between servo motor types is essential for selecting the most suitable motor for a particular application.

servo motor

What is a servo motor, and how does it function in automation systems?

A servo motor is a type of motor specifically designed for precise control of angular or linear position, velocity, and acceleration. It is widely used in various automation systems where accurate motion control is required. Let’s explore the concept of servo motors and how they function in automation systems:

A servo motor consists of a motor, a position feedback device (such as an encoder or resolver), and a control system. The control system receives input signals, typically in the form of electrical pulses or analog signals, indicating the desired position or speed. Based on these signals and the feedback from the position sensor, the control system adjusts the motor’s operation to achieve the desired motion.

The functioning of a servo motor in an automation system involves the following steps:

  1. Signal Input: The automation system provides a control signal to the servo motor, indicating the desired position, speed, or other motion parameters. This signal can be generated by a human operator, a computer, a programmable logic controller (PLC), or other control devices.
  2. Feedback System: The servo motor incorporates a position feedback device, such as an encoder or resolver, which continuously monitors the motor’s actual position. This feedback information is sent back to the control system, allowing it to compare the actual position with the desired position specified by the input signal.
  3. Control System: The control system, typically housed within the servo motor or an external servo drive, receives the input signal and the feedback from the position sensor. It processes this information and generates the appropriate control signals to the motor.
  4. Motor Operation: Based on the control signals received from the control system, the servo motor adjusts its operation to achieve the desired motion. The control system varies the motor’s voltage, current, or frequency to control the motor’s speed, torque, or position accurately.
  5. Closed-Loop Control: Servo motors operate in a closed-loop control system. The feedback information from the position sensor allows the control system to continuously monitor and adjust the motor’s operation to minimize any deviation between the desired position and the actual position. This closed-loop control mechanism provides high accuracy, repeatability, and responsiveness in motion control applications.

One of the key advantages of servo motors in automation systems is their ability to provide precise and dynamic motion control. They can rapidly accelerate, decelerate, and change direction with high accuracy, allowing for intricate and complex movements. Servo motors are widely used in applications such as robotics, CNC machines, printing presses, packaging equipment, and automated manufacturing systems.

In summary, a servo motor is a specialized motor that enables accurate control of position, velocity, and acceleration in automation systems. Through the combination of a control system and a position feedback device, servo motors can precisely adjust their operation to achieve the desired motion. Their closed-loop control mechanism and high responsiveness make them an essential component in various applications requiring precise and dynamic motion control.

China factory Kah-20cl3ne AC Servo Actuator Premium Quality Harmonic Drive Actuator Joint Actuator Motor for Robot   vacuum pump electricChina factory Kah-20cl3ne AC Servo Actuator Premium Quality Harmonic Drive Actuator Joint Actuator Motor for Robot   vacuum pump electric
editor by CX 2024-03-11