Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve
The invention relates to a full digital driving controller of a permanent magnetic linear voice coil motor used for a direct driving valve, consisting of three parts: a digital controller, a power circuit and a signal detection circuit; the digital controller circuit comprises a 32 bit floating point DSP, a field programmable logic device FPGA and an external Flash ROM; the power circuit comprises a high speed optical coupling isolation circuit, and an H bridge power main circuit consisting of intelligent power modules IPM; the signal detection circuit comprises an A/D converter, a multi path analogue switch, a Hall current sensor used for detecting the moving coil winding current, a non contact eddy current displacement sensor used for detecting the position of the moving coil and an amplification and active power filter circuit for analogue signals. The full digital driving controller of the permanent magnetic linear voice coil motor used for the direct driving valve has the advantages of high integration, good extensibility, high reliability, high frequency response and high precision.