Abstract—Passive harmonic filter topologies that mitigate harmonic problems in three-phase power system due to low DC bus capacitance of 6-pulse rectifier front end adjustable speed drives are proposed. The first filter topology is the modified typical LLCL harmonic filter with a capacitor added across the input and output reactors of each phase. The second filter…
Harmonic Filter Topologies for Low DC Bus Capacitance of 6-Pulse Rectifier Front End Adjustable Speed Drives
Harmonic Mitigation in Variable Frequency Drives: 6-Pulse Drive with Matrix AP Harmonic Filter vs. AFE Drive
Todd Shudarek, Principal Engineer – The proliferation of variable frequency drives (VFDs) has brought increased attention to harmonic effects created by drives. A standard 6-pulse drive with no harmonic mitigation technology may interfere with neighboring equipment, reduce equipment life, and negatively impact the utility power quality. Under some circumstances the total harmonic current distortion (THID)… Read more »
Harmonic Mitigation in Variable Frequency Drives: 6-Pulse Drive with MTE Matrix AP Harmonic Filter vs. 18-Pulse Drive
Todd Shudarek, Principle Engineer – The proliferation of variable frequency drives (VFDs) has brought increased attention to harmonic effects created by drives. A standard 6-pulse drive with no harmonic mitigation technology may interfere with neighboring equipment, reduce equipment life, and negatively impact the utility power quality. Under some circumstances the total harmonic current distortion (THID)… Read more »
Modeling and Practical Design Dual-Mode Sinewave and Common Mode Whitepaper
Modeling and Practical Design Dual-Mode Sinewave and Common Mode Filter for PWM Motor Drives System Using Tricore Laminations A dual-mode sinewave output filter that eliminates motor problems due to the PWM waveforms in both common mode and differential mode operation is proposed. A three-phase inductor constructed with tricore laminations. The windings possess differential mode inductance…
Permian Basin
MTE Offers Solutions to Ensure Power Quality in the Permian Basin Local Utility Companies are Demanding that Oil Producers Control Their Harmonic Distortion The Permian Basin, which is located in West Texas and New Mexico, has recently become the global hot bed of oil production. This is great for the local and national economy; however, it… Read more »
Understanding Adjustable Speed Drive Common Mode Problems and Effective Filter Solutions
Todd Shudarek, Principle Engineer – Many solutions to protect motors are present in the market. This paper presents data showing how three filters: a typical dV/dt filter, a dV/dt filter utilizing a triple defense core, and a common mode choke, perform in providing both common mode and differential mode filtering. The data shows that a…
Understanding Permanent Magnet Motor Operation and Optimized Filter Solutions
Recent trends indicate the use of permanent magnet (PM) motors because of its energy savings over induction motors. PM motors offer energy savings, higher power densities, and improved control. The upfront cost of a PM motor may be higher than an induction motor, but the total cost of ownership may be lower. However, a PM… Read more »
Using a Passive Sinewave Filter to Eliminate Common Mode and Differential Mode
An integrated output filter that eliminates motor problems due to the PWM waveforms in both common mode and differential mode operation is proposed. The filter includes a three phase inductor constructed with tricore laminations with six mutually coupled windings. The windings possess differential mode inductance and proportionally very large common mode inductance characteristics. The single integrated inductor with the capacitors creates a…