The most likely toxic chemicals that is found in baby bottles is called BPA. If high doses of this chemical is consumed, it might shut down the response system of estrogen in the babies. It could also possibly change the babies ability of producing ordinary thyroid hormones.
Law makers can address this possibility by making a law that bans the creation of a baby bottles plastic that contains these toxic chemicals. This provides with a strict interpretation of the precautionary principle because it is ‘banning’ all the bottles plastic that contains toxic chemicals. Banning is a strict interpretation.
Law makers can also make a law that limits the doses of this toxic chemical that can be found in the bottles plastic. This is a strict interpretation because there is a limit, and if the producers go above the limit, there is consequences to face.
DC motors are usually seen in applications where the motor speed needs to be externally controlled. AC motors work best in applications where power performance is sought for extended periods of time. All DC motors are single phase, but AC motors can be single phase or three phase.
AC and DC motors use the same principle of using an armature winding and magnetic field except with DC motors, the armature rotates while the magnetic field doesn’t rotate. In AC motors the armature does not rotate and the magnetic field continuously rotates.
In some applications today, DC electric motors are replaced by combining an AC electric motor with an electronic speed controller, known as variable frequency drives. DC electric motors are replaced with an AC electric motor and an electronic speed controller because it is a more economical and less expensive solution.
DC electric motors have many moving parts that are expensive to replace, and DC electric motor repair is usually more expensive than using a new AC electric motor with an electronic controller.
In our experience, combining an AC motor and drive proves to be the most cost effective solution for mostapplications. When servicing our customers in the field, we often recommend looking at the SMVector Series Variable Frequency Drive in combination with a three phase AC motor.
heavy, kinda heavy, and Hek no dawg i cant lift this.......
Hope I brought a smile on that miserable face who the hek takes AP courses in middle school i never heard of that. You must be a scholar.
