Brushless versus Brush-type Comparison

Application Guide

Brushless versus Brush-type Comparison

There are two basic types of motor design that are used for high-performance motion control systems: Brush-Type PM (permanent magnet), and Brushless-Type PM. As you can see in the figure, a brush- type motor has windings on the rotor (shaft) and magnets in the stator (frame). In a brushless-type mo- tor, the magnets are on the rotor and the windings are in the stator.

To produce optimal torque in a motor, it is necessary to direct the flow of current to the appropriate windings with respect to the magnetic fields of the permanent magnets. In a Brush-Type motor, this is accomplished by using a commutator and brushes. The brushes, which are mounted in the stator, are connected to the motor wires, and the commutator contacts, which are mounted on the rotor, are con- nected to the windings. As the rotor turns, the brushes switch the current flow to the windings which are optimally oriented with respect to the magnetic field, which in turn produces maximum torque.

In a brushless motor there is no commutator to direct the current flow through the windings. Instead, an encoder, hall sensors or a resolver on the motor shaft senses the rotor position ( and thus the mag- net orientation). The position data is fed to the amplifier which in turn commutates the motor electroni- cally by directing the current through the appropriate windings to produce maximum torque. The effect is analogous to a string of sequencing Christmas lights: the lights seem to chase each other around the string. In this case, the magnets on rotor “chase” the magnetic fields of the windings as the fields “move” around the stator.

The brushless motors are more reliable as Brush maintenance is eliminated and no brush dust is gen- erated. The brushless motor can be driven to much higher RPM limits and typically have lower inertia. The brushless motor also dissipates heat more efficiently since the stator windings are thermally con- nected to the outside of the motor case. It is also safer for explosive atmospheres and quieter and less electrical noise generated as there is no brush arcing in a brushless motor.

12 Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026

Amplifier specifications

SMC Networks Amplifier is a versatile device designed to enhance and extend wireless network coverage in both home and office environments. With the increasing reliance on Wi-Fi for accessing the internet, having a robust amplifier can significantly improve the quality and reach of your network signal. The SMC Networks Amplifier stands out for its user-friendly design, performance features, and advanced technologies.

One of the standout features of the SMC Networks Amplifier is its dual-band functionality. It operates on both 2.4GHz and 5GHz frequencies, providing users with the flexibility to choose the best frequency for their needs. The 2.4GHz band offers wider coverage and is ideal for basic tasks such as web browsing and email, while the 5GHz band provides faster speeds and is perfect for bandwidth-intensive activities like gaming and streaming.

The amplifier's smart signal indicator helps users find the optimal placement for their devices, ensuring that the amplifier can effectively boost the signal from the router. This feature eliminates the guesswork often associated with setting up network extenders, allowing for a seamless installation process.

In terms of technology, the SMC Networks Amplifier employs advanced MIMO (Multiple Input Multiple Output) technology. MIMO allows the device to send and receive multiple signals simultaneously, increasing throughput and improving the overall performance of the network. This is particularly beneficial in environments with many connected devices, where traditional amplifiers may struggle to maintain a stable connection.

Security is another priority for the SMC Networks Amplifier. It supports various encryption standards such as WPA2, ensuring that your network remains secure from unauthorized access. Additionally, the amplifier is compatible with a wide array of devices, from smartphones and tablets to smart home devices, making it an excellent addition to any modern network setup.

Another notable characteristic of the SMC Networks Amplifier is its sleek, compact design. It blends seamlessly with home or office decor and does not require extensive setup. The intuitive interface allows easy configuration, even for those with limited technical knowledge.

Overall, the SMC Networks Amplifier is an excellent choice for users looking to boost their wireless coverage. With its dual-band capability, advanced MIMO technology, robust security features, and easy installation process, it provides a comprehensive solution for enhancing Wi-Fi connectivity. Whether you are a casual user or a heavy internet user, the SMC Networks Amplifier is designed to meet your networking needs effectively.