Elevator inverter damage causes and preventive measures

The elevator inverter is a key component of the elevator system, responsible for controlling the speed and torque of the motor to ensure smooth and efficient elevator operation. Due to the high load working environment and complex electrical control requirements of elevator inverters, it is particularly important to understand their common causes of damage and corresponding preventive measures. Studying the causes of damage to elevator inverters not only improves the service life of the equipment and reduces downtime, but also ensures the safety and reliability of elevator operation. Through scientific analysis and effective preventive measures, the failure rate of elevator inverters can be minimized to provide a strong guarantee for the stable operation of the elevator system.

Common causes of inverter failure

1. bus capacitance aging: the bus capacitance life of the inverter will continue to decline with the increase in the use of time, when the bus capacitance aging to a certain extent, its charging and discharging performance will be greatly reduced, resulting in the inverter can not work properly.
2.  power module damage: the power module of the inverter is one of the most sensitive devices, the power tube may be due to a short circuit or overload and other reasons leading to permanent damage, power module damage inverter can not work properly.
3.  braking resistor short circuit: inverter open braking unit if the braking resistor short-circuit, flow through the braking tube of the instantaneous current is too large will lead to the braking tube burned, thus leading to inverter failure.
4. auxiliary source damage: auxiliary source as the inverter's own power supply, internal diodes, voltage regulators and other more sensitive devices, due to more connections with external circuits, susceptible to static electricity and other interferences and lead to damage, auxiliary source damage, the inverter will not work properly.

Inspection and Maintenance of Frequency Converters

  As one of the core devices of elevator control, frequency converter should be checked and maintained regularly, and it is recommended to check the following items:

1. Cooling fan: clean up the accumulated dust regularly and check whether there is any blocking phenomenon;
2. Bus capacitor: check whether there is bulging in the capacitor appearance and whether the total capacity of capacitor is seriously small;
3.  Power module heating: check whether the power module is abnormally hot under low power condition;
4. Electronic board: check whether there is obvious blackening or damage on the components on the circuit board, and whether the copper foil on the PCB is broken.

Anyhertz Drive(Shenzhen) Co., Ltd.(hereinafter referred to as "Anyhertz") is a leading manufacturer of high-end magnetic flux vector frequency converters in China, with independent intellectual property rights. Our company has been committed to the research and development, production, and sales of frequency converters and related electrical transmission systems.The FST-860 series is an integrated elevator controller that integrates computer technology, automatic control technology, network communication technology, and motor vector drive technology. This series of controllers adopts a brand new structural design, which is overall beautiful, reasonable layout, and uses cleaner and more environmentally friendly materials; Safe, reliable, and energy-saving, providing customers with comprehensive elevator solutions that meet the new national standards.