working principle of delta trainer board
The Delta trainer board has three main working part
A Programmable Logic Controller or PLC is basically an industrial computer used in home and manufacturing applications. Like an ordinary computer, the PLC has a CPU (Central Processing Unit) and internal memory to store programs. Aslo, PLCs have power supplies to operate their internal circuits and mermory devices. Unlike the ordinary computer, the PLC can control large industrial machines and processes using electromechanical relays and triacs. A triac is a bidirectional AC switch capable of operating high current devices like AC motors, incandescent lamps, and solenoids up to 5A (amperes). Also, the PLC has a chassis or rack to hold various Input-Output (I/O) wiring modules. The rack is made from a metal frame. Mounted to the metal frame is a printed circuit board with electrical connectors soldered to it. Software data and electrical control signals are transfer from the I/O wiring modules to the PLC’s CPU for processing. The I/O wiring modules allow a variety of electrical and electronic sensing devices and loads to easily be attached to the PLC. A terminal block attached to the I/O wiring module allows electrical switches, sensors, motors, solenoids, and incandescent lamp devices to be wired to the PLC.
A human-machine interface (HMI) is the user interface that connects an operator to the controller for an industrial system.
An inverter converts the DC voltage to an AC voltage. In most cases, the input DC voltage is usually lower while the output AC is equal to the grid supply voltage of either 120 volts, or 240 Volts depending on the country.
The inverter may be built as standalone equipment for applications such as solar power, or to work as a backup power supply from batteries which are charged separately.
The other configuration is when it is a part of a bigger circuit such as a power supply unit, or a UPS. In this case, the inverter input DC is from the rectified mains AC in the PSU, while from either the rectified AC in the in the UPS when there is power, and from the batteries whenever there is a power failure.
There are different types of inverters based on the shape of the switching waveform. These have varying circuit configurations, efficiencies, advantages and disadvantages
An inverter provides an ac voltage from dc power sources and is useful in powering electronics and electrical equipment rated at the ac mains voltage. In addition they are widely used in the switched mode power supplies inverting stages. The circuits are classified according the switching technology and switch type, the waveform, the frequency and output waveform.