Sunland proposed a multi-machine parallel high-voltage shore power supply system solution

The direct torque control (DTC) function of the inverter is another high-performance communication frequency conversion speed regulation system developed after vector control. In the mid-80s of the 20th century, the German scholar Depenbrock proposed the theory of direct torque control in 1985, and his idea was to combine the electric motor and the inverter.

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 ...

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 ...

The commissioning of the electrical system refers to the commissioning of the entire high and low voltage system. The power supply commissioning of civil electrical projects such as general residences, schools, office buildings, hotels, and shops shall be carried out in accordance with the following provisions: (1) About the commissioning of the belt in the distribution room ...

The external terminals of the inverter, RH, RM, RL, are speed control terminals. Through the combination of these terminals, three-speed and seven-speed control can be completed. In addition, the other terminals can be redefined, and the fifteen-speed speed can be controlled. ...

Prior to the introduction of frequency converters, overhead crane operators operated the cranes using contactor-based controls. For low-cycle cranes, the system is equipped with a single or two-speed motor. For cranes with higher load cycles, they use so-called wound rotor motors. ...

If you want to make the inverter last a long time, you must seriously consider the problem of heat dissipation. Because the failure rate of the inverter increases exponentially with the increase of temperature, the service life decreases exponentially with the increase of temperature. A 10 degree increase in ambient temperature halves the service life of the inverter. Thus...

1. Preparation process: Abort the device and admit that the motor is completely aborted. Press the stop button on the operator panel to stop the operation. Disconnect the external mains power supply (low-voltage cabinet drawer). Adequate security treatment should be carried out to ensure that it is indeed disconnected and that it does not ...

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.

1. Delta's super password-B series: 57522; - H-series: 33582; S1 series inverter universal password: 575222. Second, Huifeng inverter (that is, now Ou Rui inverter), the general super password of its products is: 18881500-G 1500-P 1000- ...

1. The capacitance is generally indicated by "C" plus a number in the circuit (e.g., C25 indicates the capacitance numbered 25). A capacitor is a component composed of two metal films close to each other and separated by an insulating material in the center. The characteristic of the capacitor is first and foremost the communication through the DC block. The size of the capacitance is ...

1. Select the inverter according to the load characteristics Second, when selecting the inverter, the current value of the practical motor should be used as the basis for the selection of the inverter, and the rated power of the motor can only be used as a reference. Secondly, it should be fully considered that the output of the inverter contains higher harmonics, which will form the power factor of the motor.

From October 28th to 29th, the "First National Tailings Engineering and Comprehensive Utilization Skills Seminar" sponsored by the China Nonferrous Metals Society was successfully held in Dexing City, Jiangxi Province. From China Nonferrous Metals Society, China ENFI, Jiangxi Copper, Beijing Institute of Mining and Metallurgy, University of Science and Technology Beijing and other countries...

Advantage 1: Energy saving The motor adopts frequency converter speed regulation, and its power can be improved by 5%-10%. The inverter accounts for 20%-30% of the total capacity of the communication motor in the drag of load equipment such as fans, pumps, extruders, mixers, etc., which has a significant energy-saving effect, because the consumption of the fan and water pump is significant.

First, the inverter is not repaired and the power test is tested (1) Inverter repair test rectifier circuit At the two ends of the inverter to detect the internal DC power supply, P and N ends, adjust the multimeter to the resistance RX10 gear, the red watch pen is connected to the P end, and the black watch pen is connected to R, S, T in turn.

1. The power-on trip or the main power terminal part of the inverter shows sparks. Disconnect the power cord, check whether the input terminal of the inverter is short-circuited, and check whether the DC side terminals P and N of the central circuit of the inverter are short-circuited. Perhaps the cause is a damaged rectifier or a short circuit in the central circuit. 2 ...

Each inverter (Variable-frequency Drive, VFD) is subject to different line control, and the methods of voltage control and current control can be divided into two categories, one is voltage type and the other is current type. The control mode can also be divided into voltage control and current type. The main circuit method and ...

In the process of repairing the switching power supply, the step-down method can be selected. The method is: by connecting the power plug of the display to a communication voltage regulator, and then adjusting the output voltage of the voltage regulator to about 100V, and then repairing it with electricity, and gradually improving the power supply voltage for repair. ...

Founded in 1998, Hope Lansen is a national high-tech enterprise in the fields of energy conservation and environmental protection, new energy, transmission control and intelligent equipment in China, integrating R&D, manufacturing, system integration and customer service. Its products cover high and low voltage frequency conversion control systems, automated production lines and robot transmission systems.

1. The contact screen all-in-one machine adopts the new contact identification technology, and the user only needs to touch it lightly on the contact screen without passing the pressure sensing to complete the operation. Care must be taken not to use too much force or sharps to scratch the surface of the contact screen. ...