Ripple cancellation filter for magnetic resonance imaging gradient amplifiers

• Published in: Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04 Vol. 2; pp. 792 - 796 vol.2
• Main Authors: Sabate, J., Schutten, M., Steigerwald, R., Qiming Li, Wirth, W.F.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway NJ IEEE 2004
• Subjects: Amplifiers; Applied sciences; Attenuation; Circuit properties; Circuits; Coils; Electric, optical and optoelectronic circuits; Electrical engineering. Electrical power engineering; Electromagnets; Electronic circuits; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Exact sciences and technology; Filters; Magnetic resonance imaging; Magnetic separation; Magnetic switching; Power electronics, power supplies; Power supplies; Switching frequency; Various equipment and components; Voltage; Passive component; Performance evaluation; System design; Power supply; Power electronics; Output signal; Experimental study; Nuclear magnetic resonance imaging; Switching; Acoustic wave amplifier; Output voltage; Magnet coils; Power amplifier; Inductive load

A ripple cancellation technique used on a magnetic resonance imaging (MRI) gradient switching amplifier eliminates switching frequency ripple of the output voltage and current. A new concept requiring only passive components for ripple cancellation in dc power supplies (M.J. Schutten and R.L. Steige...