Drive repair undervoltage protection under voltage generated causes and treatment methods: ① ② Power supply voltage is too low phase; ③ rectifier bridge failure: if some damage due to short circuit, the rectified voltage will drop six rectifier diodes, For damaged rectifiers and thyristors, should be careful to check siei drive repair, timely replacement. Shenyang, China Electric Co. on the main business in Europe, the United States, Japan and other countries manufacturers of industrial equipment, machinery products, to the world famous companies have long-term business contacts. In Germany, Japan, the United States has a liaison office. Direct purchase directly from Europe and the United States, Japan and other countries manufacturers. Similar imported products than domestic prices low, a lot of common specifications spot, fast delivery. When domestic users receive exclusive agent procurement of foreign spare parts monopoly price abb inverter repair, we will provide a better opportunity 6se6430 drive repair can be calculated in RMB, flexible manner. Any brand can offer in 1-3 working days. Drive repair op amp and comparator compares the difference between the operational amplifier and a dedicated inverter is relatively common in the MPU control circuit, its role is not to describe me, and do I know better than this line. An op amp can be connected to become a comparison output of the comparator is a comparison. So why the market two products are sold separately, they have the same and the difference between what is it? 2, the comparator output is generally easy OC level converter; frequency comparator does not fill, SLEW RATE than comparable op zoom, but easy access into the amplifier self-excitation. Comparator open loop amplifier gain is much higher than the average, so the positive and negative terminals of the comparator caused by small differences on the output change. 3, the frequency response on the one hand, to a further operational amplifier when the comparator output is unstable, the subsequent stage may not be able to meet the requirements of a logic circuit. 4, the comparator output is open collector, TTL level output is easy, but there is saturation voltage op amp, inconvenient to use. Shenyang, China Electric Co., Ltd. to undertake the industrial automation and control system design, installation, engineering and maintenance; professional maintenance States converter, DC governor, PLC programmer repair operations. enc drive repair drive repair _ _ Shenyang on the Limited provided by the Shenyang Electric Man. Shenyang Electric Co. on people (www.zsmsy.com) strong, credible, in other industries, such as Shenyang, Liaoning province has accumulated a large number of loyal customers. The company better work attitude and constantly improving people and innovative ideas will lead you to walk hand in hand on the Shenyang brilliant, for a better future!