slotted motor

Slotted and slotless brushless DC motors differ in construction and performance. Slotted motors deliver higher torque density for industrial loads, while slotless designs provide smoother, quieter motion ideal for precision and medical systems.

Servo motors are generally used as a high performance alternative to the stepper motor. Stepper motors have some inherent ability to control position, as they have built-in output steps.

This often allows them to be used as an open-loop position control, without any feedback encoder, as their drive signal specifies the number of steps of movement to rotate. This lack of feedback though limits their performance, as the stepper motor can only drive a load that is well within its capacity, otherwise missed steps under load may lead to positioning errors.

The encoder and controller of a servomotor are an additional cost, but they optimize the performance of the overall system (for all of speed, power and accuracy) relative to the capacity of the basic motor. With larger systems, where a powerful motor represents an increasing proportion of the system cost, servomotors have the advantage….

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February 03, 2015  11:00am EST
This webinar gives you guidelines for selecting the perfect DC motor type for your application.  For example, which motor type is used in the climate control system of the Boeing Dreamliner, and for what reasons?

• Is a brushed or a brushless design more adapted?
• Does a flat pancake type motor fit better or should it be an elongated cylindrical one?
• Are motors with a slotted iron core winding design the right choice, or should it be a motor with a slotless winding?

For motor selection, it is important to know the particular requirements of each application.

• How large are torque and speed?  Are there any gears involved?
• How is the motor operated and controlled?  What is the required precision of control?
• What are the restrictions on size and weight?
• How about special ambient conditions such as temperature and pressure?

Before answering these questions, the webinar starts with having a look at the properties of all kind of small DC motors with permanent...