How to select a DC electric motor
Bosch Industrial Motors' Kenn Langosch discusses how to select a DC electric motor for an industrial task. To start, consider motor power, speed, shaft configuration. Then ...
When it comes time to choose dc electric motors for use in products or systems under development or those about to go into mass production, design engineers are likely to base their final motor selection on three key factors: power, speed and shaft configuration. “Ultimately, it’s all about the output,” says Kenn Langosch, Sales Manager for Industrial Motors for Bosch.
Many kinds of industrial and medical equipment applications require the installation of dc motors with a gearbox to reduce or increase the motor’s speed for the application at hand. Langosch says the gearbox-equipped motors are compact in size and offer a good solution for industrial and medical equipment applications where the source of power transmission or control must be able to fit comfortably within a reduced installation space.
Additionally, the gear motors are ideal for applications where reduced weight requirements are also critical. “Think power lawnmowers,” says Langosch. “The dc electric motor in lawnmowers not only needs to be compact in size, but also relatively light in weight to make it easy for the end user to maneuver the mower, whether it is running or not.”
Of the three key motor output factors (power, speed, shaft configuration) deemed advantageous for the successful operation of an application, it is the availability of different shaft configurations that may very well be the most important item on the design engineers’ motor specifications checklist. Langosch says, “Having access to a wide range of shaft configurations can be especially helpful to design engineers during the early stages of product development. It gives them an opportunity to thoughtfully consider each shaft design’s effectiveness for working in tandem with another component. The design engineer’s choice of shaft configuration for an application can also result in time and cost savings during the assembly phase of production.”
Shaft configurations can include:
- Round with a flat
- Round with external thread
- Round with internal thread
- Round with a Woodruff key slot
- Grooved for a snap ring
- Screw type
Bosch dc electric motors include brushless and brush-type motors. Depending on the part number, the nominal power will range from 0.22 W to 2.38 kW; with nominal torque from 2 Ncm to 7 Nm. Langosch said the Bosch i-Business Group offers optimal flexibility in meeting customers’ output requirements by offering more than 500 part numbers for 12-24 volt Bosch dc electric motors. Additionally, the company can modify or enhance the standard Bosch motor offerings to best meet the power or control needs of stationary, portable and battery-powered applications, he added.
The Bosch Group
- Edited by Gust Gianos, Control Engineering, www.controleng.com
Case Study Database
Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.
These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.
Click here to visit the Case Study Database and upload your case study.
Annual Salary Survey
In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.