Schneider 140PLC maintenance; PLC maintenance; Mitsubishi plc maintenance; converter repair Schneider; Schneider TSXPLC maintenance; converter repair West Germany; Omron plc maintenance; Kymmene inverter repair; Siemens s5PLC maintenance; Hitachi plc maintenance; Raynor soft-start maintenance ; Yaskawa maintenance; drive repair Yaskawa G7; Siemens 200cn PLC maintenance; Siemens converter repair; Yaskawa G5 Inverter maintenance; Siemens 6RA27 DC governor maintenance; Siemens DC governor repair; Siemens PLC maintenance; Siemens 6RA28 DC converter repair; Siemens 6ra70 DC drives repair; board maintenance; basic characteristics of frequency motor overload is the actual temperature exceeds the rated temperature rise. So drive repair experts, inverter motor overload protection purposes but also to ensure the normal operation of inverter motor, not because of overheating and burning. The motor is running, the loss of power (mainly copper loss) is bound to be converted into heat, the temperature of the motor increases. The heating process of the motor thermal equilibrium transitional process, which is similar to the common basic law exponential rise (or fall) law. Its physical meaning is: Since the motor at elevated temperatures at the same time, necessarily want to drive around the cooling maintenance technology, the greater the temperature, the faster the heat, so the temperature does not rise linearly laws, but the slower the rise; When the heat and the heat generated by the motor divergent balance, when the temperature rise is the rated temperature rise. Motor overload refers to mechanical overloading of three-phase inverter motor shaft maintenance, the motor operating current exceeding the rated value, and led to its rise has exceeded the specified value. The main features of the motor is generally overload: inverter maintenance undervoltage protection produce undervoltage causes and treatment methods: ① ② Power supply voltage is too low phase; ③ rectifier bridge failure: if six rectifier diodes in part due to damage and short circuit , the rectified voltage will drop, the damage and the thyristor rectifier, should be careful to check the timely replacement. Shenyang Electric Co., Ltd. mainly engaged in the people of 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, the United States, Japan and other countries manufacturers. Similar imported products than domestic prices low, many of the usual standard stock inverter repair, fast delivery. When domestic users receive exclusive agent procurement of foreign spare parts monopoly price, we will provide a better opportunity to RMB, flexible manner. Any brand can offer in 1-3 working days. Qianshan drive repair, the public electrical, drive repair experts provided by the Shenyang People Electric Co. "High and low voltage inverter, high and low voltage soft starter, magnetic switches, programmable logic controller (PLC)" Preferred Shenyang on China Electric Co., Ltd. (www.zsmsy.com) (www.smdqee.com), the company is located: Shenyang, Liaoning Province Heping District Sanhao 79 A602, over the years, the heavy electrical adhere to the customers provide the best quality service, contact: Wei Song. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Electrical Shen expect to be your long-term partner!