Brushless DC (BLDC) motors work well for many applications. Generally, a smaller motor can be specified due to high efficiencies and the increased power density of the BLDC motor. For more about Groschopp's Brushless Motor visit: http://www.groschopp.com/category/products/motors/?t=230
It’s all about performance… Performance requirements for various types of induction motors for use on standard sinewave power supplies are identified in NEMA MG1. Some of these types of motors are suitable for use in variable speed applications, dependent on the type of application. Performance requirements are also identified for motors for specific use invariable speed applications.