Title :
Variable frequency switching in power supply EMI-control: an overview
Author_Institution :
Dept. of Electr. Eng., Lappeenranta Univ. of Technol., Finland
Abstract :
Spreading the signal spectrum is a widely used technique in telecommunication applications. Variable-frequency and spread spectrum modulation methods can also be utilized in power electronic applications to improve electro-magnetic compatibility (EMC). This paper gives an overview to variable-frequency techniques in power electronics with experimental results.
Keywords :
DC-DC power convertors; electromagnetic compatibility; electromagnetic interference; spread spectrum communication; switched mode power supplies; variable-frequency oscillators; 20 ms; 200 Hz; SMPS; application-specific integrated circuitry; conducted electromagnetic interference; direct sequence; electromagnetic compatibility; electromagnetic noise; filtering; frequency hopping; frequency modulation; hardware-programmed method; intelligent control system design; nonlinear control design approach; power converter noise reduction; power distribution network; power electronic applications; power supply EMI-control; pseudonoise generator; radiated electromagnetic interference; random modulation; signal spectrum; soft switching; spread spectrum modulation methods; spread spectrum operation; switch mode power supplies; system clock modulation; telecommunication applications; variable frequency switching; variable-frequency modulation methods; Clocks; Electromagnetic interference; Frequency conversion; Frequency modulation; Power harmonic filters; Power supplies; Pulse width modulation; Spread spectrum communication; Switched-mode power supply; Switches;
Journal_Title :
Aerospace and Electronic Systems Magazine, IEEE
DOI :
10.1109/MAES.2003.1259021
