Brushed motor solid magnet strength

[swagguy8]

hi guys! i was wondering if the solid magnet part of a brushed dc motor needs to be strong in order to make a strong motor? I'm designing a motor from scratch and wondering if i should use an existing ferrite magnet that is somewhat strong or should I design a electromagnet that is stronger.

thanks,
swagguy8

 

[UltrafastPED]

You can read up on it here: http://en.wikipedia.org/wiki/Brushed_DC_electric_motor

The references at the bottom will provide more details.

 

[CWatters]

A agree. You need to read up on DC motors.

It may seem obvious that a stronger magnet will give a stronger motor but it's not that simple. The strength of the magnet has an effect on the number of turns required to achieve the desired "no load rpm". Using a stronger magnet allows you to use fewer turns and so reduces losses in the winding resistance. In short a stronger magnet might produce a more efficient motor but (with some assumptions) both can produce a "strong" motor.

That said what do you mean by a "strong" motor? An ideal motor turns all the electrical power into mechanical power so they are all as "strong" as the power source. In the end it's real world effects that limit how much power a motor can deliver.

 

[swagguy8]

A agree. You need to read up on DC motors.

It may seem obvious that a stronger magnet will give a stronger motor but it's not that simple. The strength of the magnet has an effect on the number of turns required to achieve the desired "no load rpm". Using a stronger magnet allows you to use fewer turns and so reduces losses in the winding resistance. In short a stronger magnet might produce a more efficient motor but (with some assumptions) both can produce a "strong" motor.

That said what do you mean by a "strong" motor? An ideal motor turns all the electrical power into mechanical power so they are all as "strong" as the power source. In the end it's real world effects that limit how much power a motor can deliver.

what I mean by strong is lots of horsepower, preferably high rpm

thanks for the replies everyone especially for that link, ultrafastped

 

[sardar]

I can say that the strength of the solid magnet in a brushed DC motor is a crucial factor in determining the overall strength and performance of the motor. The magnet plays a key role in generating the necessary magnetic field for the motor to function.

Using an existing ferrite magnet that is somewhat strong may be a viable option, but it is important to consider the specific requirements and specifications of your motor design. If a stronger magnetic field is needed for optimal performance, then designing an electromagnet may be necessary.

However, it is important to note that designing an electromagnet can be a more complex and time-consuming process compared to using an existing magnet. Factors such as the size, shape, and material of the magnet can also affect the overall strength and performance of the motor.

In conclusion, the strength of the solid magnet in a brushed DC motor is a critical aspect to consider in motor design. Careful consideration of the specific needs and requirements of your motor will help determine the best course of action for selecting the appropriate magnet.