Dedicated motor control IC, voltage vector controlled, pure SVPWM output; IPM module for the power driver core component, the built-in overcurrent, short circuit, overtemperature the five-digit NIXIE tube display, five status LEDs (seeking the frequency, voltage, speed, counters, positive status, failures, etc); output frequency range from 0.1-400HZ accuracy: 0.1HZ; analog input 0-5VDC,0-10VDC,0/4-20mA;