For DC electric motors, our company stands out as being among the best. Founded in 1969, Minnesota Electric Technology, Inc., otherwise referred to as MET Motors, offers high-performance, custom-designed, permanent magnet DC motors for OEMs throughout the world.
With this company, you will benefit from superior service and products. When you have MET Motors build your DC electric motors in its Minnesota manufacturing facility, the performance characteristics are engineered at the company headquarters using proprietary design software written by company engineers. In addition, all production drawings are CAD generated using Autodesk Inventor.
This company utilizes the latest 3-D modeling to ensure accurate, fast, and efficient designs and proudly manufactures all DC electric motors in the United States. Every year, demand for high-quality motors increases.
For DC electric motors in Minnesota and around the country, there are common specifications needed to design a motor.
- Nominal Voltage – For DC electric motors, it is important to know the nominal voltage of the drive motor. The designer also needs to know if a motor is to be operated outside of the nominal voltage range for any period of time.
- Horsepower Rating – This is the rating of the nominal work that the motor is expected to perform. The power rating can be expressed in horsepower or watts. This requirement can also be stated as a combination of torque and speed. We will also need to know if the motor will run at different load points, as either under loading or overloading the motor are detrimental to its service life.
- Rated speed – The motor designer needs to know how fast the motor is required to run in the application. We also need to know if there are times when this speed would change, either by using a speed control to vary the voltage supplied to the motor or by increasing or decreasing the load on the motor.
- Duty cycle – As a Permanent Magnet DC Motor runs, the current passing through the windings causes heat to be generated, raising the temperature of the motor as time passes. As the motor reaches its continuous running load point, the temperature should stabilizes within an hour or so. If the temperature does not stabilize, you need a higher horsepower rated motor.
- Stall Torque – The maximum amount of torque provided by a motor with the shaft not rotating is known as stall torque. Keep in mind that if a motor is subjected to stall conditions for more than a few seconds, it likely will sustain irreparable damage.
- Inrush Current – This is the current that a motor draws upon start up, whether or not it is under load. This current drops immediately as the motor’s speed increases, but in some cases any attached electronics can become seriously damaged by the extremely high current. Sometimes motor components can be damaged also. In those cases a current limiter would be recommended.