DESIGNING EMC
FRIENDLY MOTORS AND ELECTRONIC CONTROLS FOR APPLIANCES - THE SYSTEMS
APPROACH
ABSTRACT: Many appliance designers today approach a new product by considering the motor needed to meet the
torque/speed/performance requirements. Then, an electronic control is
considered and designed to control the motor. Finally, after the product
package is complete, an EMI filter (RFI filter, EMC filter) is added for EMC regulatory compliance or
noise immunity. This approach DOES NOT result in the optimum system cost. A
better approach is to consider the motor, control, and EMC filter
concurrently during the design stage.
COURSE OUTLINE
Determining the Torque and Speed Required
What is Dynamic Performance (e.g. Speed Regulation,
Torque Transient Rejection)
What are the important system parameters (i.e.
gearing, inertia, damping)
What are other important specifications (e.g. line
voltage variation, temperature, EMI limits)
What diagnostics are required?
Are any communications needed?
What available cooling is supplied by the unit.
What EMI shielding is offered by the unit.
Selecting the Control for minimum possible current
to meet torque/speed
Selecting a Motor to meet that current and EMC
constraints.
Determining a Cost Estimate and Iterating on Motor,
Control, and EMC filter
Design Example: Triac Controlled Universal Motor
with Hall Sensor vs. PM Brush Motor with Current Sensor.
LCR believes that
an educated customer is a satisfied customer!
Therefore, LCR offers seminars to
groups of engineers on-site at your facility or at our Corporate
Headquarters in Norristown, PA.
Some of the titles of our most
recent seminars are:
Meeting the Challenge: The European Union's EMC Directive
Designing for EMC
Compliance: A Strategic Approach
Designing for EMC
Compliance: A System Approach to Integrated Appliance Controls
Designing for EMC
Compliance: A Design Guide for Appliances & Portable Tools
The ABC's of EMI in
Appliance Design
Should you or your team of
engineers have a need to be better educated in designing products to
cost-effectively meet EMC/EMI/RFI compliance regulations, please call (800)
527-4362 or email Ron@lcr-inc.com to
arrange for your seminar.
Seminars can be tailor-made
(like we do our filter solutions) to suit your exact needs.
Therefore, if you are finding
it too painful or costly to comply with the European Union EMC Directive (or
any other National or International EMC regulation) ...
or
If you need help in
structuring an EMC management system to ensure ongoing EMC compliance ...
or
If you or your team need to
develop a basic understanding of EMC, EMI and RFI concepts,
