Author: Vijay
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Window Area Calculations
Two different areas are involved in any core shape These two areas multiplication only area product (AP = AE. AW) which is important and used in inductor design steps. After selecting the core in magnetics design, we look for core areas in core data sheet for calculating the area product. The core cross-sectional area (Ae)…
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Inductor Design Equations Derivation
The main equations used in inductor design steps are derived below. These are Area Product (AP) Area product of any magnetic core involves in the cross-sectional area and window areas of core Area product, AP = AE . AW Lets derive one by one. There are two law’s are involved in this process Cross-sectional area…
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Inductor Design Flow Chart
Inductor design procedure is an important to follow for getting the targeted inductance value with a proper functioning and decent efficiency. These steps depends mainly on 3 things The complete design steps and flow shown in below flowchart for better understanding. The derivation of area product equation and number of turns equation clearly explained in…
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Phase-shift control Method
In this control, the duty cycle varies by phase-shifting the PWM pulses respect to each-other with fixed frequency and turn-on time of each pulse. duty = Function (phase-shift) Full-bridge Inverter: In general, normal full-bridge inverter shown below which is also called as 2-leg converter consist of 4 switches. Leg-1 switches : S1, S4 Leg-2 switches…
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PWM Control Methods
The control methods are important and crucial for sensitive sources and sensitive loads. When we design a converter for a particular input/output voltages and load, whenever change in the source voltage or output reference value or load that connected to converter, we need to give exact output voltage value as per the set reference value.…
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Operation of Phase-shift full-bridge converter (PSFB)
The PSFB circuit with the phase-shift PWM control method can be divided into 10 operating modes. The typical operating signals and waveforms are given below. Mode-1 (t0 -t1): Duty cycle loss mode Mode-2 (t1 – t2): Power Delivery Mode Mode-3 (t2 – t3): Dead Zone Mode After capacitors fully charge and discharge, the discharged capacitor…
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Phase-shift Full-bridge Converter with Center-tapped transformer for step-down applications
Circuit Description The circuit diagram is shown below. It is a combination of full-bridge inverter (DC-AC), high-frequency transformer, and full-wave rectifier (AC-DC) with diodes DC input is given to full-bridge inverter which converts the DC to high frequency (HF) AC –> HF AC is goes to HF transformer and it stepup/stepdown as per design requirement…
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Phase-shift Full-bridge (PSFB) Resonant Converter Topologies in EV charger
These are the mostly used PSFB topologies in different applications PSFB with Full-wave Rectifier The circuit diagram is shown below It is combination of full-bridge inverter (DC-AC), high-frequency transformer, and full-wave rectifier (AC-DC) with diodes. PSFB with Full-bridge Rectifier The circuit diagram is shown below It is combination of full-bridge inverter (DC-AC), high-frequency transformer, and…
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Why power factor correction (PFC)? and How it works for power supply and electrical system?
The power factor correction circuit is required to improve the power factor by drawing the sinusoidal current which is in-phase with the supply voltage. Ideally power factor 1 is good for the system. Mostly diode bridge rectifier is used for AC to DC power conversion due to uncontrolled and cost effective. But due to uncontrolled…
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What is Power Factor (pf)? How high value of pf is benficial in EV charging System?
Power factor correction (PFC) means improving It is defined as how much active power is drawn from grid in the amount of total power. In simple terms, Total Power (S) = Active power (P) + Reactive power (Q) Total power (S) –> Apparent power = VrmsIrms Active (Real) power (P) –> Useful power = VrmsIrms*cos(Φ)…
