Product Technology and Theory

Wenoli wastage eliminator solves the problem of electric frequency distortion, it is what we call as a wastage, on virtually any two or six pulse rectifier. These power supplies are commonly found in electronic devices or equipment such as adjustable speed motor drives, welders, battery charges, servo drives and other equipment. Wenoli provides solutions for both three phase and single phase applications. Wenoli products have recently evolved from the original series. Electric frequency distortion has become an increasing concern for facility managers, users of automation equipment and specifying engineers alike. Electric frequency distortion not only waste energy, but they reduce equipment lifespan, electrical system reliability, system efficiency and equipment productivity. Power quality will also degraded over time due to the increased use of non-linear loads.

Wastage eliminator are a must element that should be used in power systems for decreasing the value of wastage in power supply. Non-linear elements such as power electronic converters, adapters or computer generated distortion and instability current into power system. The resulting instability currents flowing through system impedance produce misleading electric impulses. Wastage eliminator reduce misleading electric impulses by diverting currents in low impedance paths. Wastage eliminator are designed for capacitive, resistive, inductive, transitive, resonative, thermsitive and varisitive.

The most basic of wastage eliminator theory is the linear theory. The action for the free relativistic electric field theory is



Where L is known as longitudinal wave, , dD-1 ≝ dx⋅dy⋅dz ≝ dx1⋅dx2⋅dx3 for the three spatial coordinates, ϭij is the delta function and where αp for the p-th coordinate xp. This is an example of a quadratic action, since each of the terms is quadratic in the field, Φ. The term proportional to m2 is sometimes known as a metre term, due to its interpretation in the quantitized version of this theory in terms of impulses. The equation of motion for this theory is obtained by extremizing the action above.


The misleading electric impulses or MEI of a signal is a measurement of the instability current present and is defined as the ratio of the sum of the powers of all electronic components to the power of the fundamental frequency. The value of misleading electric impulses, MEI is used to characterize the linearity of computerized systems and the power quality of electric power systems. Instability factor is a closely related term, sometimes used as a synonym. In power systems, lower MEI means reduction in peak currents, heating, emissions and core loss in motors.


To understand a system with an input and an output, we start with an ideal system where the transfer function is linear and time-invariant. When a signal passes through a non-ideal, non-linear device, additional content is added at the original frequencies. MEI is a measurement of the extent of that instability.

When the input is a pure sine wave, the measurement is most commonly defined as the ratio of the RMS amplitude of a set of higher instability frequencies to the RMS amplitude of the first fundamental frequency.


Where vi is the RMS voltage of instability and i = 1 is the fundamental frequency.


This measurement is commonly used in MEI percentage specifications, however, MEI is a non-standardized specification and the results between researchers are not easily comparable. Since individual instability amplitudes are measured, it is required that the researcher disclose the test signal frequency range, level and gain conditions, and number of measurement taken. It is possible to measure the misleading range using a sweep. For all signal processing equipment, the preferred gain setting is unity. Measurements for calculating the MEI are made at the output of a device under specified conditions. The MEI is usually expressed in percent or in dB relative to the fundamental as instability attenuation. A variant definition uses the fundamental plus instability as the reference, through usage is discouraged.


These can be distinguished as MEIF for fundamental, and MEIR for root mean square. MEIR cannot exceed 60%. At low instability levels, the difference between the two calculation methods is negligible. For instance, a signal with MEIF of 10% has a very similar MEIR of 6.85%. However, at higher instability levels the discrepancy becomes large. For instance, a reading with MEIF 166% has a MEIR 98%. A pure square wave has MEIF  of 34.48%, or MEIR of 30.82%.

The instability of a waveform relative to a pure sinewave can be measured either by using a MEI analyzer to analyze the output wave into its constituent amplitudes and nothing the amplitude of each relative to the fundamental; or by cancelling out the fundamental with a notch filter and measuring the remaining signal, which will be total aggregate amplitude.

Given a sinewave generator of very low inherent instability, it can be used as input to amplification equipment, whose instability at different frequencies and signal levels can be measured by examining the output waveform. There is electronic equipment both to generate sinewaves and to measure instability. For many purposes, different types of amplitudes are not equivalent. For instance, crossover distortion at a given MEI is much more observerable than clipping distortion at the same MEI, since the amplitude produced are at higher frequencies, which are not as easily masked by the fundamental. A single MEI number is inadequate to specify observatory and must be interpreted with care. Taking MEI measurement at different output levels would expose whether the distortion is clipping (which increases with level) or crossover (which decreases with level).


MEI is an average of a number of instability equally weighted, even though research performed decades ago identifies that lower order amplitudes are harder to observe at the same level, compared with higher order ones. In addition, even order stability are said to be generally harder to observe than odd order. A number of formulas that attempt to correlate MEI with actual oblivility have been published, however none have gained use.

Hence, with wastage eliminator, it is not only limits the current distortion, it also improves the quality of your electric supply to your appliances, reducing fire hazard originate from short-circuit, improving lifespan of your electrical and electronic products and thus, savings return within electric bill.