When the inverter drive repair problem sets with multiple motors, how the selected drive capacity? One inverter drives multiple motors in parallel drive repair, make the sum of the rated capacity of the motor at the rated output current of the inverter or less, and retained a 10% margin. Use drive repair electrolytic capacitors Note 1, due to the polarity of the electrolytic capacitor, and therefore can not be reversed in the circuit connection use. In the power supply circuit, the output voltage is positive then the positive power output of electrolytic capacitors, negative ground, when a negative voltage output connected to the output of the negative electrode, positive ground. When the power supply circuit filter capacitor polarity reverse, because the filter capacitor greatly reduced role, on the one hand caused by the power supply output voltage fluctuation, on the other hand because of the reverse are turned on at this time is equivalent to a heat resistance of electrolytic capacitors. When the reverse voltage exceeds a certain value VACON inverter repair, reverse leakage resistance and capacitance will become very small, so energized work soon, it can make capacitance burst damage due to overheating. 2. Plus electrolysis voltage across the capacitor can not exceed the allowable operating voltage, in the actual circuit design should leave a margin depending on the circumstances, in the design of power supply filter capacitor Schneider drive repair, if the AC voltage is 220 ~ When the transformer secondary rectified voltage up to 22V, this time selecting a withstand voltage of 25V electrolytic capacitors generally meet the requirements. However, if the AC power supply voltage fluctuations are large and likely to rise to more than 250V, the best choice for the electrolytic capacitor voltage above 30V. 3, electrolytic capacitors in the circuit should not be near high-power heating element to prevent the electrolyte is accelerated by heat leaving dry. 4, for positive and negative polarity of the signal filtering, can take two electrolytic capacitors connected in series with the polar method, as a non-polar capacitor. Siemens drive repair drive repair _ _ Xihu District, Shen electrically by the Shenyang People Electric Co. Shenyang Electric Co. on people (www.zsmsy.com) strong, credible, and other industries in other Shenyang, Liaoning province has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovative ideas will lead sink into the brilliant electric and you work for a better future!