Feb 1, 2008 12:00 PM, By Larry A. Bey, Cummins Onan Corp. You've lost normal power. Your engine-generator set (gen-set) starts up and reaches speed. Now, you want to start some large motors key to ...

Oversizing often happens when engineers try to match the inertia between the load and the motor rotor, so that they can tune the drive’s velocity, torque or position loop relatively tightly to meet ...

One of the challenges that face motion-control engineers is how to properly select a motor. If the motor is undersized or too small, it will not handle load. If the motor is oversized or too large, ...

The case of a pulsating-load testing machine shows how to ballpark qualities that are important for deploying electric motors. Crankshafts in running internal-combustion engines pulsate as well as ...

Imagineyou are designing a machine that needs to move a 200-pound load. You do quickmath to identify the properly sized motor with an inertia that preciselymatches the load. You specify the motor, but ...

Here is a simple method for estimating the actual load on an electric motor without special equipment. But first, a word of caution: Some applications (e.g., a large forced draft fan) require more ...

Inertia identification and speed control lie at the heart of modern electrical drive performance, determining both dynamic responsiveness and energy efficiency. Precise knowledge of the rotor and load ...

The operating efficiency of linear drives is of growing concern to machine designers. Here's a look at three common linear actuators — linear induction motors, rolled and ground ball screws, and rack ...