what is the advantage of DC servo motor over the AC one for robotic application?
Continuity and safety reasons.
Both types use switch mode or 'pulse width modulation these days. However... The speed of a DC motor can be controlled by changing the applied DC voltage. Controlling the speed of an AC motor is more complex than controlling a DC motor. Most notably, both the voltage *and* frequency must be changed to vary RPM of an AC motor. The speed of rotation of an AC motor is caused by the drive frequency. AC motors operate on a principle whereby the AC frequency sets up a rotating magnetic field. At lower speeds an AC motor requires a more slowly rotating field. The field pulls the rotor around, so for slower speed the field must rotate slower and therefore the drive frequency must be lower. In both cases, while very efficient to operate, PWM techniques generate considerable noise from the sharp rising and falling edges which requires careful design to eliminate the negative effects on other circuitry.
AC power can cause data signal interference. Data cables need to be shielded resulting in larger cable diameter, more weight and expense.
Why do human beings use servo rather of DC motor?.. The precise answer is, it easily relies upon on the utility that the motor's controlling. as an occasion, you desire the robotic arm to flow at an actual attitude of 37degrees..than servo motor is the single. in case you in basic terms desire the robotic arm to easily rotate then use DC motor.. attitude controlling could be finished in 2 techniques, by capacity of utilising servo motor or stepper motor..yet regularly eople could choose for servo because it provide extra precise output. to comprehend how servo works is a few thing that isn't ordinary to describe right here at Y!A as a results of dilemma of area to write down, so, you are able to google PWM = Pulse Width Modulation..that provide you the final concept of ways servo works.. p:s/ if u desire extra explanation on servo, be at liberty to digital mail me.
