Phase lock loop VS PWM

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miao0810pei

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Hi everyone, i need someone to help me here. I'm creating a 3 phase synchronous motor controller here. I need to understand what's the function of PWM and phase lock loop.

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PWM has its use in power supply, where PLL is a communication circuit. In PWM if your input voltage is within specified range it will give fixed output voltage; to get more idea on these find some datasheets

definition for PLL, a pll is an electronic circuit with a voltage or current driven oscillator that is constantly adjusted to match in phase (and thus lock on) the frequency of an input signal. In addition to stabilize a particular communication channel.
 
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