From most efficient to least, here’s how the five motor technologies stack up: salient-pole PM, nonsalient PM, synchronous-reluctance, switched-reluctance and, last but not least, induction motors.

All in all, three-phase ac induction motors demonstrate high efficiency and can maintain it across a substantial range of loading conditions. But when fed by inverter power, these motors ...

Incremental efficiency gains are the focus of the DOE’s efficiency standards. Regulating efficiency advances sustainability objectives, supports yearly cost savings for customers and may accelerate ...

Typically, motor efficiency peaks at the motor’s rated point and decreases as operating speed or load diverges from the rated point. For example, a 5-hp NEMA Premium fan motor may be 89.5% ...

The reduction in consumption then continues year after year. Since motors usually last 15 to 20 years, over a premium-efficiency motor’s lifetime the savings can be substantial. AC Induction Rules ...

By now, most engineers who work with induction motors know that new efficiency standards went into effect for them last year. The Energy Independence and Security Act (EISA) mandated upgrades to ...

Drive System Design’s Engineering Director John Morton offers insight into the evolution of driveline technologies for electric vehicles and what the future may hold.

Motor efficiency The Energy Policy Act (EPAct) became effective in 1997. EPAct requires 1-hp to 200-hp general-purpose motors sold in the United States to meet minimum efficiency levels, referred to ...

In a data center, loads can vary widely depending on the time of day. Identifying a motor with a flat efficiency curve, regardless of load, optimizes the overall efficiency of the HVAC system.

AC induction Motors Since AC induction motors have been established as the preferred choice for industrial motors and the need for reduced power in all aspects of design is ever present, the ...

Here’s a detailed comparison of EPA range with the new permanent magnet (PM) motor versus the old induction motor (IM). Note that while combined range and MPGe improved around 10%, city MPGe ...