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

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.

Most common baud rates table

The following table shows the most used baud rates. The left side part of the table shows speed and bit duration. The right part shows real transmission speed assuming there is no parity, 8 data bits and one stop bit. Bauds Bits/s Bit duration Speed Actual speed Actual byte duration 50 bauds 50 bits/s 20.000 ms 6.25 bytes/s 5 bytes/s 200.000 ms 75 bauds 75 bits/s 13.333 ms 9.375 bytes/s 7.5 bytes/s 133.333 ms 110 bauds 110 bits/s 9.091 ms 13.75 bytes/s 11 bytes/s 90.909 ms 134 bauds 134 bits/s 7.463 ms 16.75 bytes/s 13.4 bytes/s 74.627 ms 150 bauds 150 bits/s 6.667 ms 18.75 bytes/s 15 bytes/s 66.667 ms 200 bauds 200 bits/s 5.000 ms 25 bytes/s 20 bytes/s 50.000 ms 300 bauds 300 bits/s 3.333 ms 37.5 bytes/s 30 bytes/s 33.333 ms 600 bauds 600 bits/s 1.667 ms 75 bytes/s 60 bytes/s 16.667 ms 1200 bauds 1200 bits/s 833.333 µs 150 bytes/s 120 bytes/s 8.333 ms 1800 bauds 1800 bits/s 555.556 µs 225 bytes/s

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 Bytes of R

Lets learn something new

Search This Blog