Public Information
04-03
Measurement and Diagnosis of Common Mode Inductors - An Overview of Common Mode Chokes
Filter design assumes that the two parts, common mode and differential mode, are independent of each other. However, the two components are not truly independent because the common mode choke can provide considerable differential mode inductance. This differential mode inductance can be simulated by a discrete differential mode inductor. In order to take advantage of the differential mode inductance, common mode and differential mode should not be done at the same time but in a certain order during the design of the filter. First, the common mode noise should be measured and filtered out. By using a DifferentialModeRejectionNetwork, the differential mode component can be eliminated, thus
04-03
Vehicle control electronic product software development process
The software development process for automotive vehicle control electronics is a "V" shaped development process. The "V" shaped development process is divided into five phases, i.e., functional design, prototype simulation, code generation, hardware-in-the-loop simulation-HIL, and calibration.
The main tool used in the functional design stage is MATLAB, and by using Simulink, Stateflow, and other tools provided by MATLAB, we complete the tasks of designing the control scheme, designing the functional modules, designing the control algorithms, etc., and carry out the preliminary simulation work. The main tool used in the prototype simulation stage is dSPACE. using dSPA
04-02
Introduction and Application of Magnetic Components
Almost all power supply circuits are inseparable from the magnetic component inductor or transformer. For example, inductors are used at the input and output to filter out harmonics of the switching waveform; in resonant converters, inductors are used to resonate with capacitors to obtain sinusoidal voltages and currents; in buffer circuits, inductors are used to limit the rate of change of the current of the power device; in boost converters, energy is stored and transferred; and sometimes inductors are used to limit the transient current of the circuit, and so on. Transformers, on the other hand, are used to electrically isolate two systems from each other, to transform voltages or impedances, or to generate phase shifts (3-phase Δ-Y transformers), to store and transfer energy (flyback transformers), and to detect voltages and currents.
04-02
New Energy Vehicles, 5G Mobile Phones The "Spring" of Third-Generation Semiconductors
From fixed-line communications and fuel cars, to 5G smart phones and new energy vehicles, power electronics has become part of our lives, and the transformation of this process can not be separated from the wide bandwidth semiconductors - third-generation semiconductors.
04-02
Use of ferrite beads in power supply systems
An effective way to filter out high-frequency power supply noise and cleanly share similar power supply rails (i.e., the analog and digital power supply rails of a mixed-signal IC) while maintaining high-frequency isolation between the shared supply rails is to use ferrite beads.
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