AC/DC Defined

acdc-angus-youngAC/DC are an Australian hard rock band, formed in November 1973 by brothers Malcolm and Angus Young. Commonly referred to as a hard rock or blues rock band, they are also considered pioneers of heavy metal.

Contrary to belief AC / DC servo motors have no relation to traveling rock bands.

With many styles/terms of electric motors on the market nowadays it can be confusing to know what your motor actually is. Two commonly used terms thrown at you are AC and DC. The ways in which these 2 words are utilized in naming pertain to the input or output of the machine. Those two common terms can be interchanged in the description of most of the motors that we produce here at TruTech Specialty motors: Permanent Magnet AC (PMAC) or Brushless DC (BLDC).

Both motor names refer to an electric machine that has permanent magnets on its rotor with a constant magnetic field which responds to a magnetic field induced in the coils of the stator. BLDC (or PMAC) machines can be driven in a sinusoidal or trapezoidal mode.

PMAC motors describe a motor that uses permanent magnets, for its rotor field, with a back emf generated from the motor being a sinusoid, typically 3 phases.

BLDC motors describe a machine with a DC input (could be rectified from AC) that requires electronic commutation. The specific commutation it requires is not done with brushes/commutator block (like its predecessor the brush, aka PMDC, motor), but with special drive electronics to switch the current to the motor.

Furthermore, our engineers are rarely crazed under stress as lead singers may become.

Posted in Enews.