Tag Archives: Bodine Handbook

Introduction to Motor Constants for Fractional Horsepower Gearmotors

Introduction to Motor Constants for Fractional Horsepower Gearmotors

Motor constants are needed to calculate permanent magnet DC (PMDC) or brushless DC (BLDC or EC) motor specifications and ratings, or to match the motor properly to an amplifier. The motor constants are required in order to predict the PMDC or BLDC motor’s performance with changing variables, such as different input voltages or different loads. (See below PDF



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AC Induction Motors with Squirrel Cage Rotors

AC Induction Motors with Squirrel Cage Rotors

Why is it called a “squirrel cage rotor?”: Most fractional horsepower (FHP) AC induction motors utilize a die cast rotor design that consists of a skewed lamination stack with die cast rotor bars and end rings. The common term for this rotor design is “squirrel cage”, because if you remove the steel laminations after the



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Electromagnetic Holding Brakes for Small Gearmotors and Motors

Electromagnetic Holding Brakes for Small Gearmotors and Motors

Holding, or “Power-Off,” brakes provide extra safety in applications where the load must remain in position in the event of power loss or equipment failure. Our design engineers have helped OEMs develop brake systems for hundreds of AC and DC applications, from home stairlifts to industrial applications. In this article, we focus on the principles



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Quiet Gearmotors for Medical Equipment

Quiet Gearmotors for Medical Equipment

Gearmotors in mammography equipment are used to raise and lower the scanner to accommodate the patient’s height. The primary design objective is smooth and quiet operation. Our team of design engineers addressed four aspects of the gearmotor design that contribute to quiet operation. Worm Gearing Bodine recommended a right-angle gearmotor with worm gearing. The sliding



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Introduction to AC Gearmotors and Motors

Introduction to AC Gearmotors and Motors

This blog post is from an updated section of Bodine Electric’s Small Motors Handbook. To download this article as a PDF, please click here. Although commutator and brush assemblies may be used in some types of alternating current (AC) gearmotors and motors (series-/universal wound), brushless induction-type designs are by far the most common and most reliable for industrial AC



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