Asynchronous machine

Figure 1 : Asynchronous machine Diagram

The Stator is a an asynchronous machine and indicated to that of the synchronous machine :
3 coupled enrollments as a star configuration or in triangular , they are powered by a system of equilibrium supply. it will result (FERRARIS theorem ) Of the creation of a sliding magnetic field in the gap of the machine . the sliding speed of the field compared to the stator is

Ωs = ωs / p

Where ωs indicates the pulsation of the tri-phased statoric power supply network ,
p is the number of coils in each coil ,
p therefor indicates the number of pair of poles ( one pair is constituted of the North pole and the South pole)

Remark :
The stator that is put on a variable field must be papered to limit the losses by Foucault currents.

The Rotor of the machine sports a coiling similar to the stator : tri-phased coiling of the same number of poles as the stator . those 3 coils are coupled in a star configuration and a short-circuit on themselves. this type of rotor is is called coiled , but it is possible to ideate a more basic rotor made up of conducting bars short-circuited by a conducting ring at each end. we could then show that this squirrel cage rotor behaves like a wound rotor. the rotor rotates at an angular speed Ω not to be confused with Ωs.
This electromagnetic function short-circuited on the winding will give rise to a current (cont the intensity is limited by the impedance of the latter). the intersection between the current and the sliding field will give rise to forces acting on the rotor strands whose moment relative to the axis of rotation will constitute the torque of the machine. We will argue that this torque only exists if the electromagnetic function is non-zero, that is to say if fr is non-zero: the rotor must not rotate in synchronism so that there is a couple of or the name of the asynchronous machine. .

Comments

How to program 8051 based MCU using Ptroteous Schematic capture and Source code editor to use timers using AT892051 + project files

This tutorial is dedicated to use a 8051 based Microcontroller core and program it using keil's C51 tools on the Proteus Source code editor. 1- Brief History of 8051 one of the first microprocessors 4004 was invented by Intel Corporation as well as 8085 and 8086 microprocessors back in 1981,shortly after Intel introduced an 8-bit microcontroller called the 8051 . It was referred to as system on a chip because it had 128 bytes of RAM, 4K byte of on-chip ROM, two timers, one serial port, and 4 ports (8-bit wide), all on a single chip. When it became so widespread, Intel allowed other manufacturers to make and market different flavors of 8051 with its code compatible with 8051. It means that if you write your program for one flavor of 8051, it will run on other flavors too, regardless of the manufacturer. This has led to several versions with different speeds and amounts of on-chip RAM. 2- Features of AT892051 Microcontroller Compatible with MCS®-51Products 2K ...

What is the ESP32 VSPI / HSPI

The ESP32 integrates four SPI peripherals. SPI0 and SPI1 are used to access the ESP32’s attached flash memory and thus are currently not open to users to be used . They share one signal bus via an arbiter. SPI2 and SPI3 are general purpose SPI controllers, sometimes referred to as HSPI and VSPI, respectively. They are open for use. SPI2 and SPI3 have independent signal buses with the same respective names. Each bus has three CS lines to drive up to three SPI slaves.

Current Limiter Example Circuits and explained

The post explains 2 simple universal current controller circuits which can be used for safely operating any desired high watt LED. The universal high watt LED current limiter circuit explained here can be integrated with any crude DC supply source for getting an outstanding over current protection for the connected high watt LEDs. Why Current Limiting is Crucial for LEDs We know that LEDs are highly efficient devices which are able to produce dazzling illuminations at relatively lower consumption, however these devices are highly vulnerable especially to heat and current which are complementary parameters and affect an LED performance. Especially with high watt LEds which tend to generate considerable heat, the above parameters become crucial issues. If an LED is driven with higher current it will tend to get hot beyond tolerance and get destroyed, while conversely if the heat dissipation is not controlled the LED will start drawing more current until it gets destroyed. In ...

Lets learn something new

Search This Blog