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Category Archives: Engineering Talk
Introduction to Brushless DC (EC) Motor and Gearmotor Technology
Brushless DC Gearmotors and Motors In Section 3.1 of the Bodine Electric Handbook we discuss how motor action is achieved in a conventional permanent magnet DC (PMDC) motor. A segmented commutator rotating within a stationary magnetic field causes mechanical switching of the armature current. In a brushless DC (BLDC) gearmotor or motor, the magnetic fieldVIEW
Advantages and Disadvantages of Planetary Gearmotors
We design all our standard parallel shaft (helical or helical/spur) and right angle (worm or helical/worm) gearboxes in-house, and all gearheads are manufactured and assembled in our main factory in Iowa. Occasionally, we’ll receive a request to mate one of our standard AC, DC or BLDC motors to a planetary gearhead. To identify the best gearmotor option for our customer’sVIEW
Permanent Magnet (PM) DC Gearmotors and Motors
Features and Benefits of PMDC Gearmotors and Motors: Continuous duty operation DC power supply (battery or speed controls – 12/24V, 90/130V, 180V) Reversibility at rest or during rotation with current limiting Relatively constant and adjustable speed Starting torque 175% and up of rated torque High starting current, relative to full load running current Design andVIEW
Selecting DC Motor Speed Controls for PMDC Gearmotors
Basic DC motor speed controls accomplish the conversion of AC power to DC with varying degrees of DC voltage “purity.” For proper control selection you’ll need to identify which performance criteria are important to your application. We’ll review how different speed controls affect the quality of DC output and consequently, the performance of your DCVIEW
Selecting Fractional Horsepower (FHP) Gearmotors for Long-Life Applications
Buyers should first decide what kind of operating life is needed. If durability is not an issue, or if the duty is so intermittent that even a short-life (“throw-away”) motor will translate into years of operation, then you’ll want to go with the best price. But if product quality and reputation depends on reliability andVIEW
Measuring Armature Circuit Resistance in a PMDC Motor
Application Notes & Gearmotor Tips: When a permanent magnet DC (PMDC) motor fails to operate properly, or fails to run at all, one sensible troubleshooting step is to measure the winding resistance to determine if there’s an open circuit or a short circuit, either between turns of the same winding, between two windings in theVIEW
What does IR Compensation mean, and what is it used for?
The IR compensation method is used to provide the speed regulation in our DC motor speed controls. When the load of a PMDC motor increases, the amount of current that the motor draws also increases. Per the performance characteristics of permanent magnet DC (PMDC) motors, an increase in load will cause a decrease in speed, becauseVIEW
What is an AC Torque Motor? When do I use one?
Bodine Electric offers AC induction motors that are impedance protected – we call these types of motors AC Torque Motors. These motors are ideal for tensioning applications because they can operate in stall mode without overheating. Torque motors feature: Higher starting torque at lower speed and lower running torque. What does “impedance protection” mean? ItVIEW
Load Testing with Gearmotors — Know Your Current, Know Your Load
Load Testing a Drive Application with a Brushless DC Gearmotor and Control By Eman Elashye When designing a new piece of equipment that uses motors or gearmotors, design engineers must calculate how much motor torque will be needed to drive their application load. If the gearmotor or motor is undersized and too small, the productVIEW