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Designing with Current Sense optocouplers in Motor Drive systems 

In Motor drive applications accurate phase Detection of the Motor Current and transfer of data to the Controller is very important. Isolation Amplifiers work with the SHUNT RESISTOR, especially in noisy environments to provide accurate Current Measurement. The Device includes a built-in AD converter, combined with robust and reliable optical coupling technology to achieve high gain accuracy and common mode noise rejection. Typical applications include Motor phase Current sensing, DC Bus Current detection, inverter Current sensing, and Universal Voltage Detection. Compared with the conventional Hall effect Sensors or Current transformers, isolation Amplifier Detection scheme provides a Smaller, Higher Precision, Lower cost Solutions.  

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How to Design with Miniature Reflective 3-channel Encoders
 

These new miniature reflective 3-channel encoders feature built-in interpolation for high-resolution measurement that is suitable for a wide range of applications, including closed-loop stepper motors, miniature motors, printers, copiers, card readers, insulin pumps and other types of industrial, consumer and medical equipment.
 

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Using Current Sensors in Motor Drives and Power Inverters Webinar

Learn about Avago’s solution for sensing motor current and transmit signals from high voltage motor phases/rails to the control circuit for your next design. Our isolation amplifiers working in conjunction with shunt resistors provides accurate current measurements in power converter applications in the presence of high switching noise. These devices include a built-in A/D converter and robust optical coupling technology to achieve high gain accuracy and common mode noise rejection.

Typical applications include motor phase and rail current sensing, inverter current sensing, general purpose current sensing, and voltage sensing. Compared to traditional Hall Effect transducers or current transformers, the iso-amps provide smaller size, superior measurement accuracy, and lower cost solution.

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Robust & Ultra Low Power Isolation for Digital Communication Interface

Optocouplers are needed to provide high voltage insulation against transient voltage surges and to reject common mode transient noise from interfering with the input/output signals. Avago's next-generation optocouplers, ACPL-M61L/061L/064L/W61L/K64L (ACPL-x6xL) offer a significant reduction (up to 90%) in power requirements without compromising on noise isolation and high voltage insulation performance. In addition, these new optocouplers are built-in with additional features like slew-rate controlled output, wide supply range, making them extremely easy to be designed for digital communication interface.

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Motion Control Solutions Webinar

What Can Encoder Technology Do For You? This webcast explains the technology, type of encoders, how they work and other valuable information on how they are designed. Areas of concern will also be addressed. Optical encoders have greater accuracy in linear and rotary motion sensing, and learning to optimize the application's capabilities, delivers a more satisfying end product to the customer/end user.

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