Field Weakening

Want to learn a dirty little secret about electric motors? Yes, there is a secret. And, no, it’s not like Victoria’s secret. Pssst, the secret is electric motors do not like electronic-field weakening,

What? That can’t be! We use electronic-field weakening in our motors to achieve higher rpm’s. Your claim must be fake news.

It’s real news. Electronic-field weakening uses a significant amount of energy to overcome the effects of back EMF. And that extra energy reduces operating efficiency. In a battery-powered application, using the extra energy reduces range. DuraTrac achieves higher motor speeds using mechanical-field weakening. Using mechanical-field weakening dramatically reduces the energy loss.

Now you ask, “Why didn’t I know the dirty secret about the electronic-field weakening?” It’s not your fault. Until DuraTrac introduced a way to field weaken mechanically, there was no alternative. And, most people still don’t know there’s an alternative.

OK, we’ll take some of the blame for not educating everyone about the benefits of mechanical-field weakening. But now we’re trying to correct that problem.

To start learning more about overcoming the penalties of electronic-field weakening, download the white paper, Advantages of Mechanical vs Electronic Field Weakening.” (PDF). The paper includes charts and formulas for calculations. Let that info soak in and then think about how DuraTrac could provide advantages for your application. Also, visit the Retrofit page discussing how DuraTrac technology can be applied to existing motor designs.