Delta frequency converter maintenance steps

First, the repair of frequency converter must first check whether the sound in the operation of the motor is abnormal, including whether it is sensational in the operation of the motor.

Two, check whether the natural environment of frequency converter installation is changed. For example, whether the operating temperature is normal. Those who know the maintenance of Delta frequency converter should understand that the operating temperature of frequency converter is generally prescribed in the range of -10℃ - +40℃, and 25℃ is appropriate.

Three, check the frequency converter heat exhaust fan is not normal operation, for example, the frequency converter heat exhaust safety channel is not smooth, there is also a frequency converter marked on the control panel to indicate the output of electricity flow, operating voltage and frequency of these various main parameters are not normal.

Four, frequency converter repair also need to check whether the frequency converter is high temperature. Infrared thermometer can be used to check whether the radiator of the converter is high temperature, or whether the odor is heavy. It is also necessary to check whether there are common fault alarms in the operation of the frequency converter.

Five, Delta frequency converter protection and maintenance should also ensure that the daily removal of the air inlet pipe screen inside the low-voltage complete equipment on time. Maintain control box and frequency converter in perfect condition for a long time. Because it can reasonably remove the area of dust on the frequency converter, but also prevent dust from entering the frequency converter, reasonably remove the oil stains of the frequency converter fan, and reduce the generation of heat discharge problems.

Delta DVP-1 22KW converter, no response on power-on, no display on actual operation control panel, 24V operating voltage of control terminal is 0. Common faults are identified as switching power supply circuit or switching power supply circuit supply system circuit. Check the energy storage capacitor at both ends of the DC circuit without 530V communication voltage.

Além disso, verifique se o disjuntor FU da estrada de pré-carregamento foi quebrado, resultando no circuito de fonte de alimentação do interruptor não pode obter a fonte de alimentação de entrada, toda a greve da máquina. Considere plenamente o motivo da quebra é que o tiristor no circuito retificador trifásico não é acionado para quebrar, e o circuito de fonte de alimentação de pré-carregamento está sujeito ao impacto de corrente, de modo a quebrar FU.

Depois que a FU é substituída por uma nova e energizada, a tensão de comunicação não pode ser detectada nos terminais de gatilho dos três tiristores. Quando um curto contato é feito com VT3 no circuito de fonte de alimentação, todos os terminais de gatilho dos 3 tiristores têm a tensão de operação de gatilho inserida e os 3 tiristores estão ligados. Verifique se a junção do coletor VT3 foi aberta danificada, VT3 substituído por tubo de alimentação BU406, a falha comum levantada.