The role of current sensor in inverter control
Small power supplies have been incorporating more and more new technologies. Such as switching power supply, hard switching, soft switching, parameter regulation, linear feedback regulator, magnetic amplifier technology, digital voltage regulator, PWM, SPWM, electromagnetic compatibility and so on.
The actual demand directly promotes the continuous development and advancement of power supply technology, in order to automatically detect and display current, and has automatic protection function and more advanced intelligent control when the overcurrent, overvoltage and other hazards occur, with sensing detection, sensing sampling, Sensing-protected power supply technology is becoming a trend, and sensors for detecting current or voltage have emerged and are beginning to be favored by power supply designers in China.
The current sensor is used as a key component in the inverter control to ensure the performance of the inverter. At present, some of the inverter failures on the market are caused by damage or poor use of the current sensor.
The following describes the current sensor in the frequency converter, generally supporting the current sensor, there is a corresponding power supply ± 12V, ± 15V; conditioning circuit constitutes a current sampling module, the module converts the three-phase stator current into a basic binary code, Provide timely information on the current to complete the adjustment of the cur