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  • What are the main functions of the main control circuit?

    * Question

    What are the main functions of the main control circuit?


    *
    Answer

    Receive various signals. The main control circuit mainly receives the following signals:
    1) In the function presetting stage, it receives preset signals for each function.
    2) Receive the given signal input from the keyboard or external input terminal.
    3) Receive control signals input from external input terminals.
    4) Receive status signals input from voltage and current sampling circuits and other sensors.
    5) Perform basic operations.
    The main control circuit mainly performs the following operations:
    1) Performs vector control operations or other necessary operations.
    2) The time of each switching point of the SPWM waveform is calculated in real time.
    3) Output the calculation result.

    The calculation results of the main control circuit output are:
    1) The drive circuit output to the inverter, so that the inverter device outputs the SPWM voltage wave according to the given signal and preset requirements.
    2) Output to the display, showing the current various states.
    3) Output to external output terminal.

    Realize various control functions. Receive various control signals input from the keyboard and external input terminals, and control the start, stop, speed up, speed down, and jog of the SPWM signal.

    Implement various protection functions.
    Receive signals from voltage and current sampling circuits and other sensors (such as temperature sensors), and compare and judge with the limits in the preset function. If you think that a fault has occurred, then:
    1) Stop sending SPWM signals to make the inverter Abort output.
    2) Output an alarm signal to the output control terminal.
    3) Output the fault cause signal to the display.


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