Inspiration magnetic knowledge detailed

Several definitions: 1. Magnetic field strength h, unit: A / m (from the dimension knowledge, this physical quantity is dying in the current. It can be understood as an alias of a current, the basis of the ampere loop theorem) 2. Magnetic induction strength B, unit: Wb / m2 or t (is a physical quantity depending on the magnetic permeability U and H 3. Magneticivity u, b = uh. In MKS, the unit is: h / m. 4. Magnetic flux = area X magnetic induction strength Be 5. Magnetic chain = turns X magnetic flux Be 6. Inductance = magnetic chain / current Be The above law is combined with electromagnetic various equations, and the following equation can be obtained: 1. (Ampere Ring Road) 2. (Farami electromagnetic induction law) 3. (Slope Industrial Pavilion) You can also get the following useful conclusions: 1. Under the same magnetic core, the inductance value is proportional to the number of turns (Binding slope printing theorem) Be The concept of inductive inductance coefficients is introduced by the above formula. Be (It means that the inductance value generated by each coil is only related to the magnetic core under the same core material and specifications. 2. Under the same core material, the core energy storage capacity is proportional to the volume. Under the same volume, the core energy storage capacity is proportional to its maximum magnetic induction strength. The same volume, the same magnetic induction strength, the core storage energy is inversely proportional to its magnetic permeability. The same inductive value, under the same core, the inductor energy is larger than the current square. (Binding to the pitching podium theorem) (U is absolute magnetic permeability) 3. Because of the law, I satisfy the law of Kilkhov, so similar, HLM is also satisfied. Therefore, the magnetic flux is also satisfied, so there is a definition of the following: Magnetic momentum: So define the magnetic resistance: Iron loss = hysteresis loss (determined by hysteresis retardation) + eddy current loss (by magnetic core resistivity, size decision) + residual loss (often ignore) Be In fact, eddy current loss is often ignored, especially in high frequency soft magnetic conditions. 5. In addition, under DC offset, the magnetores will decrease, resulting in a decrease in electricity, so when calculating the electrical inductance, first calculate the minimum inductor in the worst case (the inductance has the maximum peak current, that is, the largest DC Bias, the most saturated), according to the maximum inductance (non-DC offset) of the AP method, ensuring the boundary value condition. Technology area On Mu, the SiC, GaN, and Three Levels brought by Siqiang reach your efficiency. How to prevent switching power supply noise by using secondary output filters Ceramic vertical mount package (CVMP) welding precautions and layout Mathematical modeling and loop compensation design of DC-DC converters What are the commonly used benchmark regulated power?