High Quality Linear Motor
DC brushless linear motors provide non-contact operation for maintenance-free operation. Available in both ironless (cog-free) and iron core versions. They are capable of high speed and high acceleration motion profiles. They can be driven using standard 3 phase brushless servo amplifiers. Brushless linear motors can achieve an acceleration of up to 12 g’s, and speeds in excess of 200+ inches per second [5+ m/s].
- Product Introduction
Shandong Heqi Hydraulic Machinery Equipment Co., Ltd., formerly known as Jining Gongcheng Hydraulic Machinery Factory, was founded in 1999. Since its establishment, it has been supplying hydraulic parts for Eaton Company. The quality index of its products has always been among the best among all suppliers of Eaton Company, and it has been awarded the honor of excellent quality supplier for many years.
Why Choose Us
Quick Transportation
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Quality Assurance
Each batch of goods has a corresponding quality inspection report to solve your concerns about product quality.
Quality service
Customer service will update you the logistics information of the goods in time to ensure that the goods are delivered in time.
Production Equipment
CNC lathe, CNC machining center, CNC milling machine, CNC surface grinder, CNC cylindrical grinder, CNC hobbing machine, CNC grinding machine, CNC forming grinder, broaching machine, etc.
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Linear motors are electric motors that provide motion along a straight line rather than in a circular motion like traditional rotary motors. This motor is quite an engineering marvel, as it obeys the fundamental laws guiding the operation of conventional rotational motors while providing higher accuracy, repeatability, and versatility of operation. This allows for more precise and efficient movement, making them useful in a variety of applications.
Benefits of High Quality Linear Motor
High speed and accuracy
Traditional motors can suffer from backlash and other issues that lead to imprecise movement, but that is not the case with a linear motor. These motors have no mechanical parts like gears or belts that can wear down or fail, leading to more consistent and reliable performance.
Compact size
Because there are no moving parts, linear motors can be much smaller and lighter than traditional motors. This makes them ideal for use in applications where space is limited or weight is a concern.
Highly customizable
They can be designed to fit specific applications and requirements, making them a versatile solution for a wide range of industries. Some key applications of linear motors include aerospace, robotics, and medical equipment.
Environmentally
Linear motors are also environmentally friendly. Because they are electric, they produce no emissions and require no fuel, making them a clean and sustainable alternative to traditional motors.
As we have seen, a linear motor is constructed the same as a brushless rotary motor, but flattened out. When used in an application the load is attached to the carriage that moves along the permanent magnets. Since there is no gearing this is a direct-drive system giving it incredible responsiveness and speed with no backlash. Linear motors are used in direct drive applications where the speed and accuracy requirements are more than a rotary motor and mechanical actuator can provide.
On the other hand, ball screws and linear actuators use rotary motors connected to a mechanical gearing system that translates rotary motion into linear motion. Since gearing is involved, the amount of force available is much higher than the force available from a linear motor. The shorter the lead on the ball screw, the more force can be generated, but there's a sacrifice in speed. There will also be backlash to contend with in many of these types of systems which reduces accuracy.
DC brushless linear motors
DC brushless linear motors provide non-contact operation for maintenance-free operation. Available in both ironless (cog-free) and iron core versions. They are capable of high speed and high acceleration motion profiles. They can be driven using standard 3 phase brushless servo amplifiers. Brushless linear motors can achieve an acceleration of up to 12 g's, and speeds in excess of 200+ inches per second [5+ m/s].
DC brush linear motors
DC brush linear motors are ideal for long stroke, open or closed loop servo, linear motion applications. They can be used at speeds up to 100 in/sec [2.5 m/sec] and as low as 1 in/sec [25 mm/sec]. They are capable of very precise position, velocity, and acceleration control when coupled with a linear encoder.
DC voice coil
DC voice coil actuators are ideal for short stroke (typically less than 2 inches) closed loop servo applications. Their compact size allows them to fit into small spaces. They have very low electrical and mechanical time constants. The low moving mass allows for high accelerations of light payloads. They are available in both moving coil and moving magnet versions.
Linear stepper motors
Linear stepper motors are used in both open loop and closed loop positioning applications. Since the positioning is built into the forcer and platen, no additional feedback devices are required which reduces the overall cost of a system. For open loop operation, no servo tuning is necessary. Multiple forcers can operate on a single platen. With linear steppers, acceleration of 1 g and speeds up to 100 in/sec [2.5 m/s] are typical. They are available in both single-axis and dual-axis versions.
Flat AC linear induction motor
The flat AC linear induction motor (LIM) is typically run directly off of 3 phase line voltage, with an adjustable frequency, or vector drive if speed control is required. Accelerations of up to 1 g with speeds in excess of 1800 inches per second [45 m/s] are possible with LIMs. They are ideal for high speed, long travel applications moving heavy payloads.
Tubular AC linear induction motor
The tubular AC linear induction motor (polynoid) is typically run directly off of single or 3 phase line voltage. Accelerations greater than 1 g are possible with polynoids. They are ideal for short stroke, low duty cycle applications. They can be used to replace air cylinders when compressed air is not available.
Application of Linear Motor
Manufacturing Automation
Linear motors drive conveyors and assembly lines with exceptional speed and precision. They reduce the mechanical complexity and maintenance requirements of traditional conveyor systems.
Medical Devices
Linear motors are essential for the precise positioning required for MRI machines and robotic surgical instruments. Their smooth and controlled motion ensures safety and reliability.
Transportation
Linear motors are the driving force behind maglev trains. Maglev trains operate without physical contact between the train and the track. Linear motors enable a quieter, smoother ride at higher speeds.
Defense and Aerospace
Linear motors are used in a variety of applications from missile deployment systems to satellite positioning mechanisms. Their reliability and precise control are essential for these applications.
Entertainment
Linear motors power stage machinery and special effects with precise and quiet motion. This enhances the audience experience.
Robotics
Linear motors have driven advances in robotics. They enable them to perform complex movements and tasks with high precision and flexibility.
Semiconductor Manufacturing
Linear motors are highly automated and precise. This feature has led to their use in lithography and wafer-handling systems for semiconductor production.
Research and Development
Linear motors can be used in applications such as particle accelerators and other precision instruments. This can help scientific research institutions ensure accurate experimental results.
Consumer Products
Linear motors are becoming more common in consumer products such as adjustable desks and automatic doors. They provide greater convenience and efficiency.
Force and Speed Requirements: Determine the required force and speed of the linear motor to ensure it meets the application's performance needs.
Travel Range: Consider the required travel range or stroke length of the linear motor to ensure it can cover the desired distance.
Accuracy and Precision: Evaluate the level of accuracy and precision needed for positioning and motion control tasks.
Environmental Conditions: Assess the environmental conditions, such as temperature, humidity, and exposure to dust or contaminants, to select a linear motor with suitable protection and durability.
Integration with Control Systems
Ensure compatibility with existing control systems and interfaces for seamless integration into the overall system architecture.
Maintenance Requirements
Consider the maintenance requirements and accessibility of components for servicing and upkeep.
Cost and Budget
Evaluate the cost-effectiveness of different linear motor options based on performance, features, and upfront costs.
Stator
The stator is the fixed part of the linear motor, usually made of metal. It contains stator coils and stator magnets, which are used to generate a magnetic field to drive the rotor to move.
Rotor
The rotor is the moving part of the linear motor, and its design can be either flat or tubular. The rotor contains rotor coils and rotor guides, and generates movement through the magnetic field generated by the stator.
Envelope
The envelope is the protective layer of the linear motor, usually made of metal or plastic materials. The envelope can effectively protect important components such as the stator, rotor, and guide rails from external physical influences, maintaining the normal operation and life of the motor.
Coil
The coil is installed on the stator and rotor and is the key to the operation of the linear motor. When the coil is energized, an electromagnetic force is generated, which drives the rotor to move on the guide rail to complete the power consumption of the motor.
Recision machining: The high precision and high dynamic performance of linear motors make them ideal drive devices in precision machining fields such as CNC machine tools, laser cutting and welding. It can improve the machining accuracy and speed of CNC machine tools, especially in high-precision parts machining and complex surface machining.
Electronic manufacturing: The high speed and high precision of linear motors make them an ideal drive solution in SMT equipment and PCB drilling and cutting. It can achieve high-precision positioning and motion control, and improve the manufacturing accuracy and efficiency of electronic products.
Medical equipment: Linear motors are used in medical equipment including CT scanners, MRI equipment, and surgical robots. Its high precision, low noise and low vibration characteristics enable medical equipment to provide more accurate diagnosis and treatment.
Automation and robotics: Linear motors have important applications in industrial robots and automated production lines. It can improve the motion accuracy and speed of robot arms and enhance the efficiency and flexibility of robots in manufacturing and assembly processes.
Solutions to Common Linear Motor Failure Problems
Electrical Overload
Electrical overload or over-current is caused by an excessive current flow within the linear motor windings, exceeding the design current which the motor is able to carry efficiently and safely. This can be caused by a low supply voltage, resulting in the motor drawing in more current in an attempt to maintain its torque. It can also be a result of short circuited conductors, or an excessive voltage supply.
Possible solution: Electrical overload can be prevented by installing effective over-current protection which will detect overcurrent and interrupt supply.
Low Resistance
The most common cause of linear motor failure, and arguably the most difficult to overcome, is low resistance. Low resistance is caused by the degradation of the insulation of the windings due to conditions such as overheating, corrosion, or physical damage. This leads to insufficient isolation between the conductors or motor windings, which can cause leakages and short circuits, and eventually motor failure.
Possible solution: The insulation should be regularly inspected for signs of wear, and replaced before low resistance is able to cause failure.
Over-Heating
Around 55% of insulating failures in motors occur due to overheating. Overheating can be caused by poor power quality, or a high temperature operating environment. For every 10oc that the temperature of a motor rises, the insulation life reduced by 50%.
Possible solution: It is critical that the linear motor is kept as cool as possible, ensuring the operating environment is kept cool if possible will help prevent breakdowns.
Contamination
Contamination from dust, dirt and chemicals is one of the leading causes of linear motor failure. Foreign bodies which find their way inside the motor can dent bearing raceways and balls, leading to high levels of vibration and wear. It can also block the cooling fan, limiting the motor's ability to regulate its temperature, and increasing the likelihood of overheating.
Possible solution: Preventing contamination is relatively easy. Keep work areas, tools and fixtures as clean as possible to help eliminate the chance of contamination entering the linear motor. Also, when laying out the workspace, try to position motors away from grinding machines which produce large amounts of contaminants.
Vibration
Vibration can lead to many issues with the linear motor, and can eventually cause the motor to fail prematurely. Vibration is often caused by the linear motor being positioned on an uneven or unstable surface. However, vibration can also be a result of an underlying issue with the motor, such as loose bearings, misalignment, or corrosion.
Possible solution: The motor should be checked for vibration regularly, using a linear motor analysis tool. In order to reduce vibration, ensure that the motor is positioned on a flat, stable surface. If vibration still occurs, check for signs of wear, as well as loose bearings or misalignment.
Keeping the Motor Clean: It is crucial to maintain the cleanliness of the motor and prevent the entry of oil, water, and other contaminants into the linear motor's internal components. This helps in preventing damage and ensures optimal performance.
Inspecting Terminal and Base Bolts: Regularly check the terminal bolts and base bolts of the linear motor to ensure they are securely fastened. Loose connections can lead to inefficiencies and potential safety hazards.
Checking for Overheating and Oil Leakage: Monitor the linear motor's external temperature to identify any signs of overheating. Additionally, inspect the bearings at both ends for any oil leakage, which could indicate a potential issue that needs attention.
Observing Unusual Noises, Vibrations, and Odors: During operation, pay attention to any abnormal noises, vibrations, or unusual odors coming from the linear motor, as these could be indicators of underlying problems that require immediate attention.
FAQ
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