Sunland inverter overcurrent fault maintenance method

According to the test, the service life of the inverter is halved for every 10°C increase in the operating ambient temperature. For this reason, in daily use, a reasonable maintenance cycle and guidelines should be formulated according to the actual operating environment and load characteristics of the inverter.

What is a frequency converter? Variable Frequency Drive (VFD) uses inverter technology and microelectronics to change the operating power frequency of the motor to control the power control unit of the communication motor. The inverter is mainly composed of rectifier (from communication to DC), inverter, inverter (from DC to communication) ...

Robot contactors are noisy? Cause: It is likely that the joint contact surface of the contactor is uneven, and the surface is sand or rust. The result will constitute a phase loss, which will lead to the burnout of contactors, switch frequency conversion and other components. Solution: will control the ...

To be able to connect, you must use larger special specifications, the inverter outputs higher harmonics, and the leakage current is larger than that of conventional leakage switches, which simply trip, and requires the use of large-scale or special types of leakage switches. Many VFD manuals have instructions on the installation and selection of leakage switches.

The main manifestations of the disturbance of the inverter in the application are: higher harmonics, noise and oscillation, load matching, heat generation and other problems. These disturbances are unavoidable, because the input part of the inverter is a rectifier circuit and the output part is an inverter circuit, both of which are made up of nonlinear components that play a switching effect.

1. Motor control The inverter is mainly used in the field of motor control, which can complete the speed control, torque control, and azimuth control of the motor. The inverter can adjust the speed and load of the motor according to the process requirements, which can improve the output power and quality. 2. Air conditioning refrigeration ...

1. What does open-loop mean in the use of inverters? The speed detector (PG) is installed on the motor equipment in operation, and the speed response of the actual speed is sent to the control equipment, which is called "closed loop", and the speed detector that does not use PG is called "open loop". Most general-purpose drives are open-loop ...

The following four steps are very important for the commissioning of the inverter with the machine (i.e., connected to the motor) and no-load (i.e., the motor without load). (1) Set the power of the motor, the number of pole pairs, and check the operating current of the inverter. （ ...

When the peripheral equipment and the inverter share the same power supply, the disturbance generated by the inverter is transmitted against the power line, which will cause other equipment in the same system to malfunction. The following methods can be adopted: (1) The input device of the inverter is equipped with an EMI filter or a ferrite common-mode filter (magnetic ring) ...

1: In the operation of the motor, if dust, water stains and other debris enter its interior, it will constitute a short-circuit medium, which can damage the wire insulation layer, form an inter-turn short circuit, increase the current, increase the temperature and incinerate the motor. Therefore, dust, water stains and other debris should be prevented from entering the motor.

ER. The meaning of the OUE fault code is: overvoltage during standby. The possible reasons are: 1. DC bus voltage detection circuit failure; 2. The input voltage is abnormal or the power is lost during operation. It can detect whether the power supply voltage used by the inverter is normal, and in addition, it is necessary to check whether the power supply line of the inverter is ...

First, according to the classification and selection of inverters 1. Inverters can be divided into general-purpose inverters and special inverters. 2. General-purpose inverters are mainly used in: general fan pumps (referring to inverters that only drag a single fan or pump) loads, mechanical loads, and loads requiring high overloads.

There is a circuit breaker QF and a communication contactor KM between the power supply and the inverter, when the inverter does not need to be used for a long time. or when the equipment is overhauled, the circuit breaker is used as an isolation switch, which can block the power supply and ensure the safety of maintenance. It has maintenance functions such as overcurrent and undervoltage. The main power of the inverter ...

(1). The deceleration time of the frequency conversion parameter is increased or free parking is adopted Assuming that the overpressure phenomenon is present in the parking process, the process has no parking requirements for the parking time or direction, and the deceleration time can be increased appropriately. The reason for the overvoltage in the parking process is that after the frequency conversion announces the deceleration command, the motor ...

Most of the damage of the inverter module is due to the damage of the driving electric, which causes the two switching devices on one bridge arm to be turned on at the same time. Inverter inverter power module damage is a common problem in other inverter equipment such as vector inverter or energy-saving inverter.

What happens when the inverter-controlled motor presses the abort button, and the motor is not controlled to speed up? 1. If it is a newly installed inverter, it is generally necessary to consider the wiring problem, you can first change the parameters to switch to the panel control, the panel is given the frequency, and then see if the inverter operation will appear in this ...

1. Mechanical speed regulation form There are three methods of mechanical speed regulation: electromagnetic clutch, hydraulic coupling, and viscous clutch. Among them, the hydraulic coupling device is widely used, that is, a hydraulic coupling device is connected in series between the motor and the load, and the concave and convex liquid level is used to adjust the hydraulic coupling between the motor and the load.

The wiring interval between the motor and the inverter is too long, causing the new motor to catch fire Burn two new motors in a row! The output current and voltage of the inverter are balanced, the input voltage is balanced, the current is unstable, the fluctuation is 20%-50%, the inverter is burned off by a short circuit between 35Hz turns, the grid voltage is very stable, 720V, ...

1) Oil circuit inspection: Open the safety valve to check whether there is any leakage in the oil circuit. 2) Line check: whether the R, S, T, PE on the input side of the driver, U, V, W, PE lines on the output side and the control line are corresponding. 3) Check whether the power supply voltage of the incoming terminal of the servo drive is normal ...

In order to ensure the safe, efficient and reliable operation of the inverter, the following keys should be grasped when using the inverter: 1) It is necessary to reliably ground the grounding terminal of the inverter, so as to effectively press the radio frequency disturbance and enhance the reliability of the system.