FT series solar energy inverter dc to ac
In the resistance value formula, ρ is the resistivity of the resistive material (ohm cm); L is the length of the resistor body (cm); A is the cross-sectional area of the resistor body (square centimeter). The thickness d of the thin film resistor is very small, which is difficult to measure accurately, and ρ changes with the thickness, so it is regarded as a constant related to the thin film material, which is called the film resistance. In fact, it is the resistance value of the square film, so it is also called square resistance (ohm/square). For uniform films
In the film resistance formula, W is the width (cm) of the film. Usually Rs should be within a limited range, too large Rs will affect the stability of the resistor performance. Therefore, the cylindrical resistor body is grooved, and the planar resistor body is etched with a circuitous pattern to expand its resistance range and fine-tune the resistance value. The volt-ampere characteristic is a graphical curve to represent the relationship between the voltage and current at the end of the resistor. When the voltage and current are proportional (the characteristic is a straight line), it is called a linear resistance, otherwise it is called a non-linear resistance. Parameters and characteristics The main parameters that characterize the resistance characteristics are the nominal resistance value and its allowable deviation, rated power, load characteristics, resistance temperature coefficient, etc. Nominal Resistance The design resistance marked on the resistor with a number or color code.
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