2019年5月31日星期五

BONDED MAGNETS for HIGH TECH SYSTEMS APPLICATIONS

BONDED MAGNETS for HIGH TECH SYSTEMS APPLICATIONS

The market of High Tech Systems, including motors and generators is continuously developing technical solutions which are more and more acting on the edge of technology. The increased use of robotics is just an example of this.

Hot Formed NdFeB Magnet applications hightech systems


This also requires innovative magnetic technology which is able to follow these requirements. By intensive cooperation during the design phase, HSMAG makes expertise available to the customers to develop the magnetic solution which is required for the application and a secured supply during mass production.

special flux design of multi-pole skewed ring
special flux design of multi-pole skewed ring

Our solutions

HSMAG permanent magnet technologies are very suitable for applications were miniaturization is a very important design criteria. Magnets with very small diameters, multi-pole magnetization patterns and different wave-forms can be produced and well controlled by using the Hot Formed NdFeB (MQ3) magnet technology.

Wind Power Generator Magnet

N50 Wind Power Generator Magnet

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Wind Turbine Permanent Magnet

Wind Turbine Permanent Magnet

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Segment Custom Neodymium Magnet

Segment Custom Neodymium Magnet for Motor or Generator

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Segment Neodymium Magnets

Segment Neodymium Magnets

Segment Neodymium Magnets, Rare Earth Arc Permanent Magnet, NdFeB Segment China Supplier and Factory Segment Neodymium Magnets, also called rare earth ndfeb segment magnet (Neo segment / arc / tile), are among the most powerful permanent magnets available. Our range is suited to a wide range of applications, including micro-motor, high-speed motor, electronic industry, car industry, rotors, wind turbines, […]

2019年5月29日星期三

Magnets for Medical Applications

Magnets for Medical Applications

Trends which are noticeable in the medical market are improved ergonomics, weight and size reduction and increase in speed. Motors for medical applications must frequently endure hostile environments, caustics fluids, radiation, steam, elevated temperatures, vacuum, vibration and mechanical impact.

Magnets for Medical Applications


For these applications HSMAG can offer the most suitable permanent magnet technology. Whether being a medical pump or motors for surgery equipment and dental drills, Magnet e Motion very well knows the requirements that have to be met.

smco magnets for medical
smco magnets for medical

Our solutions

An example of an application were HSMAG permanent magnet technologies can be used are brushless DC motors for driving dental drills.

Alternator Permanent Magnet

Rare Earth Alternator Permanent Magnet

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Neodymium Generator Permanent Magnet

Neodymium Generator Permanent Magnet

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Industry Motor Permanet Magnet

Industry Motor Permanet Magnet

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Permanent Synchronous Motor Magnets

Permanent Synchronous Motor Magnets

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2019年5月27日星期一

How linear motors work

How linear motors work?

In a traditional DC electric motor, a central core of tightly wrapped magnetic material (known as the rotor) spins at high speed between the fixed poles of a magnet (known as the stator) when an electric current is applied. In an AC induction motor, electromagnets positioned around the edge of the motor are used to generate a rotating magnetic field in the central space between them. This “induces” (produces) electric currents in a rotor, causing it to spin. In an electric car, DC or AC motors like these are used to drive gears and wheels and convert rotational motion into motion in a straight line.

How linear motors work


A linear motor is effectively an AC induction motor that has been cut open and unwrapped. The “stator” is laid out in the form of a track of flat coils made from aluminum or copper and is known as the “primary” of a linear motor. The “rotor” takes the form of a moving platform known as the “secondary.” When the current is switched on, the secondary glides past the primary supported and propelled by a magnetic field.

Linear motors have a number of advantages over ordinary motors. Most obviously, there are no moving parts to go wrong. As the platform rides above the track on a cushion of air, there is no loss of energy to friction or vibration (but because the air-gap is greater in a linear motor, more power is required and the efficiency is lower). The lack of an intermediate gearbox to convert rotational motion into straight-line motion saves energy. Finally, as both acceleration and braking are achieved through electromagnetism, linear motors are much quieter than ordinary motors.

Superconducting magnets

The main problem with linear motors has been the cost and difficulty of developing suitable electromagnets. Enormously powerful electromagnets are required to levitate (lift) and move something as big as a train, and these typically consume substantial amounts of electric power. Linear motors often now use superconducting magnets to solve this problem.

If electromagnets are cooled to low temperatures using liquid helium or nitrogen their electrical resistance disappears almost entirely, which reduces power consumption considerably. This helpful effect, known as superconductivity, has been the subject of intense research since the mid 1980s and makes large-scale linear motors that much more viable.

  • Linear Motor Magnets

    Linear Motor Magnets


    2019年5月25日星期六

    What is a torque motor?

    What is a torque motor?

    Rotational electric motors have been around for ages but a lot has changed since then. How did electric motors change? What innovations have been made? Torque motors have benefitted greatly from the knowledge gained making linear motors.

    Utilizing a brushless 3-phase design they can provide even greater efficiency and power, especially at low rpm. Meanwhile minimizing maintenance requirements.

    What is a torque motor
    What is a torque motor

    Torque motors excel in their ability to directly drive applications. There’s no need for a transmission/gearbox. The moving rotor of the torque motor is glued or clamped directly on the driven part. Throughout the rev-range a high continuous torque is available.

    Required torque and available space help determine the diameter and width of the motor. Motors can be very slim but large in diameter (large axles and turntables) or have a ‘height’ close to their diameter, resulting in a compact but high-torque motor.



    FEATURES

    All torque motors, large or small, follow a similar design. Important characteristics of the torque motor are:

    3-phase synchronous
    Brushless and maintenance free
    Permanent magnet rotor (4+ poles)
    Direct drive
    High level of control
    Low mass

    Because of their high torque delivery and no inertia-mismatch, torque motors do not require gearboxes or transmissions. The rotor of a torque motor can be directly mounted to an axle. This can even be a hollow axle, reducing the rotating mass and increasing mechanical efficiency.

    Torque motors are used in a wide variety of products. From rotary tables to robotic arms. Do you have an application that might benefit from a torque motor? Contact our HSMAG sales team for more information.

    In the next torque note we will discuss the installation of torque motors.

    NdFeB Segment Wind Power Alternator Magnet

    NdFeB Segment Wind Power Alternator Magnet

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    Rare Earth Neodymium N52 Magnet for Motor

    Six Arc Segments Make 2″ Ring Rare Earth Neodymium N52 Magnet for Motor

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    Custom-made Wind Generator Magnet Assemblies

    Custom-made Wind Generator Magnet Assemblies

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    Free Energy N50 Neodymium Magnets

    The Strongest Grade Free Energy N50 Neodymium Magnets

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    2019年5月23日星期四

    Magnetic Moving Systems

    Magnetic Moving Systems

    Moving Magnet Systems

    For applications that require non-contact, particle-free transport, such as clean rooms, vacuums, or chemical environments, a moving magnet linear motor meets the most demanding process requirements.

    In the case of clean room and vacuum applications, any particle-generating components must be positioned outside of the controlled environment to avoid degrading the environment. For applications that involve the presence of hazardous chemicals, safety requirements demand that electrical components be located outside of the work area. The moving magnet system, jointly developed by HSMAG and a motion control partner, provides the perfect solution to these requirements.


    Moving Magnet Systems

    Here is an balanced dual-sided “U” shaped magnet channel. This is in excellent functional and cosmetic condition and are guaranteed in perfect working order with a 30 day right of return. These are designed for ironless linear motors. We have these motors available in a seperate listing.

    This assembly includes an iron core linear motor with a moving magnet plate (secondary part), which is installed in the working environment and provides transport. The unique feature of the moving magnet system is that the coils (primary part), along with the electrical components, are located outside the process area and remain stationary. As with standard iron core linear motors, the magnet plate and coils are separated by an air gap, but in this case, the gap is larger than that of a standard linear motor, to allow room for the vacuum chamber wall that separates them. The air gap is one of the factors that affects linear motor performance, including the motor’s K-factor. HSMAG specifies the K-factor of its linear motors at 0.5mm air gap and a heat sink temperature of 20 degree Celsius.

    Customized Motors

    In case our standard motor series are not sufficient for your application, it is also possible to have these motors customized in a variety of ways. This can range from simple modifications, like a different connector, to fully custom motors designed from scratch. Thanks to our in-house R&D department, the possibilities are virtually endless. Below you will find examples of the different levels of customization we can provide.

    The moving magnet system offers all the traditional advantages over rollers, chains, or belt transport systems – higher stiffness, better accuracy, and higher acceleration. But it also allows the use of multiple, independently controlled carriages and a high level of scalability and flexibility for cost-effective integration with a machine or production line. One down side of the moving magnet system is that the cost-per-meter can be high due to the separate coils and electric drives required for each coil. But the main advantage of this system is the location of the electrical components and particle-generating parts outside of the working environment, which ensures safety and production reliability.

    6155 Everlube Magnets for Halbach Array

    6155 Everlube Magnets for Halbach Array

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    Everlube Coated NdFeB Rare Earth Block Magnet for Linear Motor

    Everlube Coated NdFeB Rare Earth Block Magnet for Linear Motor

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    Customized Everlube Coated Magnets

    Customized Everlube Coated Magnets

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    Super Long Rectangular Countersunk Neodymium Magnet

    Super Long Rectangular Countersunk Neodymium Magnet

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    2019年5月21日星期二

    Linear Motor Benefits in Systems Design

    Linear Motor Benefits in Systems Design

    A majority of automated systems using linear motors today rely on a rotary servo motor coupled to a ball screw, belt-drive, rack-and-pinion, or even a cam-follower mechanism which convert the rotary motion of the motor to its linear translation. Increased demand for higher throughput, a need for millions of operating cycles, and increased positioning accuracy requirements, however, have exposed shortcomings in these traditional linear motion systems.

    To meet these new demands, direct drive linear motor driven systems are often considered the best alternative. By virtue of being connected directly to the load, the need for conversion mechanisms is eliminated, thereby clearing the way for increased system performance. The absence of these rotary-to-linear conversion mechanisms also simplifies the overall drive system and is the main advantage of linear motors over servo motors and conversion mechanisms.

    Linear Motor Benefits in Systems Design
    Linear Motor Benefits in Systems Design

    Design Advantages
    The advantages of a direct drive linear motor are inherent to its design. A linear motor is essentially a rotary servo motor cut open and unrolled. It consists of two main elements: the forcer and the magnetic way.

    he forcer is usually the moving member and is comprised of coil windings encapsulated in a thermally conductive resin body. The magnetic way is typically stationary and consists of rare earth magnets placed on a steel carrier plate.

    The same basic technology used to produce torque in a rotary motor produces force in a linear motor. Thrust is generated by the interaction of the forcer’s electrically energized windings and the magnetic field generated by the magnetic way. The forcer’s direct connection to the payload increases system stiffness and eliminates any potential compliance, backlash and friction issues associated with ball screw, rack-and-pinion, belt-driven and cam-follower systems. This increased stiffness in a linear motor system allows for an improved level of dynamic response.

    A typical ball screw drive system with reasonable design parameters has a maximum dynamic bandwidth of 5 to 15 Hz. This means that an unloaded ball screw can reverse its rotation up to five to 15 times per second in a controlled manner.

    The limited bandwidth is a result of the relatively low torsional rigidity of the screw shaft and ball nut, as well as the rotary motor’s inertia combined with the inertia of the screw shaft. Furthermore, the linear stiffness of a ball screw is not constant and is dependent on the position of the ball nut, further minimizing controllability in dynamic applications.

    In contrast, a typical linear motor has a bandwidth of 40 Hz or more. This superior dynamic response is largely due to the lack of conversion mechanisms and the linear nature of the motor’s forcer. The increased bandwidth allows for faster machine cycle times and increased throughput. The linear motor’s mechanical time constant is also much smaller than a ball screw system, contributing to its dynamic response.

    Ironless_linear_motors_principles

    Precision Comparisons
    With all linear motors, position feedback is provided directly at the forcer, supplying an accurate reading of the position of the load. Unless a secondary linear feedback device is added, rotary motors rely on a rotary encoder coupled directly to the motor. The rotary encoder cannot account for any backlash or lost motion in the conversion mechanism, so the true position of the load is not known.

    Although backlash in ball screws can be minimized by preloading the ball nut, this adds to friction and wear. Backlash in a rack-and-pinion system can be eliminated, but only with costly electronic preloading. On the other hand, linear motor systems can achieve a high level of absolute positioning accuracy and positioning repeatability, limited only by the resolution and accuracy of the linear encoder.

    It is principally for this reason that laser cutting and laser scribing machines benefit from linear motor characteristics such as positioning accuracy, smooth travel and virtually limitless travel length. With ball screws, limited travel length can be an issue, depending on the application. Ball screws are supported at the ends, and as the unsupported length increases with longer travel lengths, screw sag becomes an issue that can affect performance and speed.

    Belt-driven and rack-and-pinion systems can provide long travel lengths, but not necessarily the precision and accuracy required. A linear motor provides submicron repeatability and accuracy, and its non-contact operation makes it friction-free.

    A motor’s maximum acceleration is inversely proportional to the moving mass or rotating inertia. The rotary-to-linear conversion mechanisms found in traditional servo linear motion systems add inertia. Linear motors don’t have to contend with this inertia, and a typical linear motor design has relatively low mass compared to its rotary counterpart. These characteristics allow linear motors to achieve up to 20 Gs of acceleration and 5 m/s maximum velocity.

    Ironcore_linear_motors_principles

    Flexibility Considerations
    Another advantage of linear motors is increased flexibility in machine design. With a linear motor, multiple carriages can be run independently on a single track sharing the same support members, linear bearing rails and linear encoder scale – thereby guaranteeing parallelism between moving forcers while minimizing space requirements. Multiple forcers can also be joined for applications requiring larger thrust forces than can be provided by a single forcer.

    An example of the increased flexibility in machine design offered by linear motors can be illustrated in an application example where a rotary cam is replaced by a linear motor. Rotary cams convert rotary to linear motion by means of a cam and a follower or a linkage system. In this example, machine flexibility is increased by replacing multiple cams driven from one drive shaft with independent linear axes. Each axis can now run independently with separate move profiles, allowing the machine to produce a wider range of products.

    Application Design and Cost Issues
    Of course, not all applications can benefit from linear motors – and cost is one of the main factors. While the total life cycle cost of a linear motor system can be low compared to a rotary servo motor and linear translation motion system, many designers are reluctant to make the higher initial investment.

    Another issue with linear motors is that their higher acceleration rates can cause disturbances unless sufficient stiffness is designed into the machine frame. Although every motor produces heat, a linear motor’s direct connection to the load can be a disadvantage when it comes to providing thermal dissipation as heat is transferred directly to the load. Heat-sensitive applications will require external air or liquid cooling, or the linear motor can be oversized to minimize the temperature rise in the motor coil.


    Other linear motor design considerations include magnetic attraction forces between the motor coil and magnet track. A strong magnetic attraction force exists between iron-core linear motors and magnet tracks, typically in the range of two to four times peak force. This magnetic force must be accounted for in the selection of the linear bearings; however, it is important to note that this magnetic preload can also help in increasing the system’s frequency response and improving deceleration and settling times.

    Block Neodymium Servo Motor Magnet

    Block Neodymium Servo Motor Magnet 38UH

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    Block Neodymium Magnets 10 x 10 x 5 mm N50 Nickel Plating

    Block Neodymium Magnets 10 x 10 x 5 mm N50 Nickel Plating

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    Block Rare Earth Sintered Neodymium Magnets 10 x 10 x 2 mm

    Block Rare Earth Sintered Neodymium Magnets 10 x 10 x 2 mm

    Block Rare Earth Sintered Neodymium Magnets 10 x 10 x 2 mm, N45 Rare Earth NdFeB Block Magnets with Nickel Plating, Stronger Square Neodymium Magnets Sintered Neodymium Magnets Technical Specification: Part No.: HSNB-10-10-2-N45Ni Magnetisation Grade: N45 Material: Sintered Neodymium-Iron-Boron (Rare Earth NdFeB) Plating / Coating: Nickel (Ni-Cu-Ni) Magnet Shape: Block, Rectangular, Rectangle, Square Magnet Size: Total Length (L): […]

    Color Zinc Plating Neodymium Block Magnet

    Color Zinc Plating Neodymium Block Magnet

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    Designers should also be aware that exposed linear magnets can attract ferrous particulates, and therefore can present safety concerns associated with magnetic forces (for example, if the machine operator has an electronic pacemaker). For these reasons, magnetic shielding or protective covers must be designed into the system.

    Cable management is another issue of concern for systems designers. In most linear motors, especially those with long travel lengths, the forcer moves while the magnets are stationary. A moving cable management system is therefore required, and it must be designed to prevent premature failure of the power and encoder cables. This means using cable carriers with an adequate bend radius and high flexing cables. For short travels, it may be possible to fix the coil and move the magnet track, thereby removing the need for any cable management.

    2019年5月19日星期日

    Powerful magnets can kill cancer cells

    Powerful magnets can kill cancer cells

    According to the British “Daily Express” reported on October 8, recently Korean scientists have made new breakthroughs in cancer therapy. They have developed a weapon against this disease, using powerful magnetic pulses to open the “self-destructive” inside the tumor. Switch to make cancer cells “suicide” effectively. The research was carried out by scientists at Yonsei University in Korea, and the results were recently published in the journal Nature Materials. The principle of this innovative therapy is to attach tiny iron nanoparticles to antibodies on cancer cell receptor molecules. When the magnetic field is turned on, these molecules will come together and trigger a “death signal.” This process brings new hopes for cancer, helping to develop targeted therapies to kill tumor cells that are resistant to stylized cell death. In laboratory tests, the researchers found that when exposed to nanoparticles and placed between two magnets, more than half of the intestinal cancer cells would be destroyed, while untreated cells would not be affected.


    Powerful magnets can kill cancer cells

    Conquering the new hope of cancer, using powerful magnets to make cancer cells “suicide” effectively

    Using powerful magnets to effectively kill cancer cells, there is a new direction in the treatment of cancer. According to foreign media reports, Korean scientists have made new breakthroughs in cancer therapy. They have developed a means of combating this disease, using powerful magnetic pulses to open the “self-destruction” switch inside the tumor, allowing cancer cells to effectively “suicide”. .
    The research was carried out by scientists at Yonsei University in Korea, and the results were recently published in the journal Nature Materials. The principle of this innovative therapy is to attach tiny iron nanoparticles to antibodies on cancer cell receptor molecules. When the magnetic field is turned on, these molecules will come together and trigger a “death signal.”
    This process brings new hopes for cancer, helping to develop targeted therapies to kill tumor cells that are resistant to stylized cell death. In laboratory tests, the researchers found that when exposed to nanoparticles and placed between two magnets, more than half of the intestinal cancer cells would be destroyed, while untreated cells would not be affected.
    Cancer is one of the most difficult conditions to overcome, and we hope that scientists around the world will use various means to overcome it as soon as possible.

    Waterproof Magnetic Buttons for Clothing

    Sew in Magnets Disc Waterproof Magnetic Buttons

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    huge-neodymium-block-magnet-with-countersunk-hole-for-wind-turbine

    Huge Neodymium Block Countersunk Magnet

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    Customized Rare Earth Neodymium Block Magnets with Epoxy Coating

    Customized Rare Earth Neodymium Block Magnets W/ Epoxy Coating

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    Neodymium Block Linear Actuator Magnets

    Neodymium Block Linear Actuator Magnets

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