1. As soon as the inverter of the heat exchange station is opened, the pressure transmitter jumps randomly;
2. In the water supply controlled by the inverter, the pressure transformer is used as a signal to collect the pressure, and the pressure transformer is disturbed by the inverter;
3. When the inverter starts the motor, the voltage converter signal is unstable and beats violently;
4. The voltage transformer (4-20mA) jumps randomly after the LS inverter is started, while the nearby integrated thermal resistance (4-20mA) is not affected, and the signal lines are not shielded;
These phenomena are due to the disturbance of LS inverters. So why do drives cause disturbance? First of all, we all know that the frequency converter is used to change the frequency. The inverter includes a rectifier circuit and an inverter circuit, and the input alternating current is converted into DC voltage through the rectifier circuit and flat-wave circuit, and then the DC voltage is converted into pulse voltage of different widths (called pulse width modulation voltage, PWM) through the inverter. By using this PWM voltage to drive the motor, the motor torque and speed can be adjusted.
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