Inverter control scheme for fan and water pump - Senlan inverter

Inverters often encounter a variety of problems during commissioning and use, during which overvoltage is the most common. After the overvoltage occurs, in order to avoid damage to the internal circuit, the overvoltage protection function of the inverter will work, so that the inverter will operate intermittently, resulting in the equipment can not be ...

(1) Check whether the motor is hot. If the temperature rise of the motor is not high, you should first check whether the size of the load, the acceleration and deceleration time, and the running cycle time are reasonable, and correct the V/F characteristics, and check whether the electronic thermal protection function of the inverter is preset reasonably, such as the inverter.

The control specifications of the inverter cabinet include reliability, accuracy, safety, environmental habits and versatility, etc., which are important guarantees to ensure the normal operation and safe production of the inverter cabinet control system. Reliability specification: The control system should have high reliability and can be used for a long time.

For the most popular electrical control equipment inverter (Variable-frequency Drive, VFD), as a precision electronic industrial control equipment, in order to run smoothly for a long time, we, as professional and technical personnel, need to be on the VFD device or before the operation.

In the 90s of the 20th century, PLC has formed a variety of PLCs: micro, small, medium, large and giant. According to the number of I/O points, it can be divided into five types: micro PLC (32 I/O), small PLC (256 I/O), medium PLC (1024 I/O), large PLC (4.69 I/O), and giant PLC (8195 I/O). ...

(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 ...

The general operation process is as follows: Enter the program through the operation panel and set the parameters, and set the relevant parameter groups such as the start-stop method, operation and control form according to the requirements of the industrial control. After confirming that the wiring is correct, the no-load power on test run and ...

In order to thoroughly implement the spirit of General Secretary Xi Jinping's important instructions that the economic power must be a maritime power, a shipping power, economic development, a strong country, and transportation, especially shipping, and the implementation of the outline for the construction of a transportation power, the port ship shore power system has become the standard for green ports.

There are many special faults, which come and go, looming, making it impossible to judge and deal with. At this time, you can clean the circuit board with water or alcohol, and brush off the dust and rust on the circuit board with a soft brush, especially pay attention to the solder joints are dense, and the circuit near the 0 volt copper layer is also ...

In the process of practical speed regulation, a general frequency-adjustable communication power supply can not meet the requirements of speed regulation and control of asynchronous motors, and must also take into account the problems of using the magnetic field of the motor, pressing the starting current and obtaining the desired torque characteristics, such as low-frequency torque characteristics.

The rotational speed of an induction AC motor (henceforth referred to as a motor) is approximately determined by the number of poles and frequency of the motor. The number of poles of the motor is fixed by the operating principle of the motor. Since the number of poles is not a successive value (a multiple of 2, e.g. 2,4,6), ...

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) 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 ...

Poor choice This should be the situation that friends have encountered the most in the Z, the situation of large horse-drawn carts and small horse-drawn carts is everywhere. The big horse-drawn trolley is not bad, at least there is no big problem in use, the most investment has been added, and the equipment can still operate normally; But the small horse-drawn cart ...

Hope Sunland inverter is a high-performance inverter product, which has high operational reliability, high energy efficiency, strong control performance and long service life. Hope Sunland inverter has been widely used in industrial process production control, machinery control, water treatment, construction and transportation and other fields. This article will start with ...

On April 15, 2011, the "Century Tour of China's Automation Industry (CAIE2011)" was held in Beijing, and Sunland inverter was once again re-elected as "China's well-known brand of domestic inverter". Dr. Chen Bin, President of Continental Hope Group and Chairman of Hope Sunland Technology Co., Ltd., personally ...

1. Condensation The temperature difference in the workshop is large, and the inside of the inverter presents condensation. 2. Impact load. The load fluctuates greatly, and the output current of the inverter suddenly increases, resulting in module damage. 3. The inverter is overloaded in the start, ...

In general, there is a problem with the maintenance trip of the VFD. If you look at the faulty code, you can see what kind of fault is causing it. 1. The selection talent of VFD may be too small; Generally, when selecting VFD, it should be about 20% larger than the rated power of the motor, so that when the motor reaches full load...

(1) Rectifier. As one of the most important components of the inverter, the rectifier can convert the AC power into direct current. Its working method is more common to that of a battery charger or arc welder. It uses a diode bridge to limit the communication sine wave to only one direction.

In addition to the limitation of the maximum promised current of the special energy consumption braking unit of the inverter, the selection of the braking resistor has no clear correspondence with the braking unit, and its resistance value is mainly selected according to the size of the required braking torque. Power...