Questions and Answers

A linear motor is a special type of electric motor that does not produce a rotating motion, but instead generates linear movement. It uses the interaction of magnetic fields and electric current to enable direct, straight-line motion.

The linear motor consists of two main components:

• Stator: Contains copper coils wound around a ferromagnetic core, which generate a magnetic field when power is supplied.
• Movable motor part (primary or secondary part): This can contain a conductive plate or permanent magnets and is moved along a straight line by the generated magnetic field.

The speed and direction of the linear motor are controlled by the control system, which adjusts the current flow and magnetic field intensity.

Compared to traditional mechanical drive systems, the linear motor offers a number of advantages:

• High speed and precision: It allows for fast and accurate positioning.
• Low mechanical wear: Since there are no direct friction surfaces, less wear occurs.
• Energy efficiency: With direct drive and no additional gears, energy losses are minimized.
• Compact and adaptable design: Linear motors are flexible and can be easily integrated into existing systems.
• Quiet operation: Reduced mechanical friction leads to a quieter operation.

The control is carried out via an electronic regulation system that adjusts current, voltage, and magnetic field. Sensors monitor speed and position, ensuring precise motion control.

• Electric linear motor: The classic design with copper coils and ferromagnetic components.
• Ironless linear motor: Particularly lightweight and suitable for applications with high dynamics where no large force is required.
• Magnetic linear motor: Works with permanent magnets and generates linear motion through magnetic interactions.

The maximum speed depends on several factors, including the motor power, the carried load, and the stroke. Linear motors are among the fastest linear drive systems and are more efficient than mechanical alternatives.

The design of a linear motor is tailored to the specific requirements of the application. The key parameters are:

• Power and torque
• Size and installation environment
• Load requirements

Due to their high precision and efficiency, linear motors are found in numerous industries:

• Automation technology: Precise movements in production lines and robotic systems.
• Medical technology: Used in imaging techniques and surgical instruments.
• Semiconductor industry: Highest accuracy in the manufacturing of microchips.
• Transportation: Drive for maglev trains and modern elevator systems.
• Packaging industry: Control of high-speed packaging machines.
• And more. See https://sinadrives.com/anwendungen-von-linearmotoren/

A linear motor can move in multiple axes (x, y, z). The Z-axis describes the vertical movement of a system.

Before delivery, each linear motor undergoes various testing procedures:

• Mechanical inspection: Checking the cables, magnets, and assembly parts.
• Electrical tests: Resistance measurement, voltage testing.
• Performance evaluation: Speed, acceleration, and generated force.
• Thermal analysis: Temperature control to prevent overheating.
• Communication testing: Compatibility with control systems.

• A linear motor generates direct, linear motion without additional mechanisms.
• A servomotor, on the other hand, generates rotary motion, which is converted into linear motion through gears or screws.

The technology of linear motors has revolutionized industrial automation. Their high precision, efficiency, and ease of maintenance make them the ideal solution for many demanding applications. Whether in medical technology, automation, or the semiconductor industry, linear motors offer unmatched performance and flexibility.

Would you like to learn more about customized linear motor solutions? Contact us for a personalized consultation!