This post covers topic of introduction into robotics and industrial automation. Industrial robots are machines controlled by integrated computer. Nowadays robots do the groundwork…
Month: April 2018
What is rotating electric machine
Rotating electrical machine consists of a stator, rotor and the air gap between them. Stator and rotor has windings . The rotor is installed…
BJT definition and characteristics
BJT transistor is a three terminal semiconductor device, based on three layers of p and n layers, with different doping concentration. BJT transistor can…
Magnetic induction vector circulation
There are two methods of magnetic induction B calculation. The first method is using the Biot-Savart-Laplace and induction superposition principle. The second method is…
Electromagnetic induction
In 1831 British physicist Michael Faraday was analysing all the cases of electromagnetic induction phenomena – phenomena of current induction in a conductor along…
Quarter-wave impedance transformer
The quarter-wave impedance transformer is a device that matches the transmission line and the impedance and is shown in Figure 1. Let's consider the…
Direct-current machines and equations
The schematic of a DC machine is depicted below. As you can see it has magnetic poles on both stator and rotor. The torque,…
Nanoelectronics: MEMS fabrication methods
As mentioned before MEMS can be fabricated with three following methods: bulk micromachining, surface micromachining, and high-aspect ratio micromachining (HARM). MEMS fabrication is based…
Power MOSFET and it’s characteristics
This post tells about power MOSFET characteristics and operating modes. Power MOSFET is a unipolar three-terminal semiconductor device that controls the large amounts of…
Transmission line circuit for mismatched load and generator
Let's consider the most general case of a circuit, where we have the arbitrary loads Z1, Z2 and an arbitrary generator. The input impedance of…