LS power generation installs the switching power supply step

Frequency conversion speed regulation motor is generally selected 4-level motor, the fundamental frequency operation point is designed at 50Hz, the frequency of 0-50Hz (speed 0-1480r/min) scale of the motor for constant torque operation, frequency 50-100Hz (speed 1480-2800r/min) scale of the motor for constant power operation, the entire speed regulation scale of (0 ...

The operating principle of the contactor is: when the contactor coil is energized, the coil current will generate a magnetic field, and the generated magnetic field will make the static iron core attract the moving core with electromagnetic attraction, and drive the communication contactor point action, the normally closed contact is disconnected, and the normally open contact is closed, and the two are linked. When the coil is de-energized ...

Because the application method is incorrect or the setting environment is unreasonable, the inverter will simply malfunction and cause problems, or the expected operation effect will not be satisfied. In order to prevent problems before they occur, it is important to carefully analyze the cause of the problem in advance. ...

VVVF frequency conversion, vector control frequency conversion, and direct torque control frequency conversion are all one of the AC-DC-AC frequency conversion. Its common disadvantages are low input power factor, large harmonic current, large demand for energy storage capacitors in DC circuits, and renewable energy can not be reflected back to the grid, that is, it cannot carry out four-quadrant operation.

(1) This series is divided into two types: economic type and standard type, which can meet the requirements of different customers: Economical: 10/14/20/30 points (10/14 points with 2 built-in analog potentiometers), up to 70 points. Standard type: 20/30/40/60 point DR/DRT (2-axis position ...

Driver: Under the premise of carrying out frequency conversion skills, the servo drive has carried out more advanced control skills and algorithm operations than general frequency conversion in the current ring, speed ring and azimuth ring inside the drive (the frequency converter does not have this ring), and it is much stronger than the traditional servo in terms of function.

In fact, the fault of the motor is not the cause of the motor itself, most of them are caused by the non-standard debugging of the inverter or the wrong inverter motor when the inverter motor is used, etc., mainly in the following situations: 1. Treat the general motor as a ...

In general, the cage rotor motor will be planned according to the frequency conversion, and at the same time the inverter (Variable-frequency Drive, VFD) drag, in different load characteristics, it is necessary to select VFDs with different functions, so now we ask a question. Can VFD be used with ...

Control method: i.e. speed control, rotation control, PID control or other methods. After adopting the control method, it is generally necessary to carry out static or dynamic identification according to the control accuracy and requirements. Low operating frequency: that is, the small speed of the motor running, when the motor is running at low speed, its heat dissipation function ...

As an alternative to traditional relays, PLC is widely used in various fields of industrial control. Because the PLC can be used to change the control process with software, and has the characteristics of small size, sensitive assembly, simple programming, strong anti-disturbance ability and high reliability, it is especially suitable for operation in harsh environments. ...

1 AC three-phase circuit a) Yellow for phase A, green for phase B, and red for phase C; b) Light and blue colors for the neutral line or neutral line; C) Yellow and green two-color wires are used for safety grounding wires. 2 AC circuits connected by twinax wires or stranded wires: red, black ...

1. The inverter can adjust the power of the motor and complete the variable speed operation of the motor, so as to achieve the purpose of saving electricity. For example, it is reflected in the centrifugal fan and water pump, when the centrifugal fan and water pump use the frequency converter, the operator can convert the frequency to regulate the speed, and can easily control the flow rate according to the need, so as to save ...

From the point of view of application, the function of the terminal block should be achieved: it is necessary to conduct the local conduction of the touch part, and the touch is reliable. The insulating part should not be conducted, and it is necessary to insulate it firmly. There are three common forms of fatal problems in terminal blocks: ...

In the course of regularly checking the variable-frequency drive (VFD) of the tensile testing machine, we can visually check the operating status directly from the outside. (1) The ambient temperature is normal, and it is required to be between -10°C and +40 ...

When the LS power generation module is put into operation, its working process is generally divided into three stages: input sampling, user program fulfillment, and output rewriting. The completion of these three phases is called a scan cycle. During the entire operation, the PLC's CPU repeatedly performs the upper ...

1. Auxiliary contact: the contact mechanically linked with the main circuit of the circuit breaker and the closing mechanism is mainly used for the display of the circuit breaker and the closing status, and is connected to the control circuit of the circuit breaker through the opening and closing of the circuit breaker to control or interlock its related electrical appliances. For example, output to signal lights, relays, etc.

Single-phase current transmitter is a kind of power test substation developed for the power measurement of single-phase AC in motor test on the basis of motor test and test technology research, in accordance with IEC and relevant national specifications for motor test. The selection of advanced filtering technology, reasonable software algorithms, processing ...

A． The output voltage of the SPWM inverter is a series of pulses, and the pulse frequency is equal to the carrier frequency. B. In the current of the motor, there is a harmonic component with a strong carrier frequency, which will cause the vibration of the motor core and announce the noise. If the frequency of the noise is the same as that of the motor core.

1. Select the corresponding category of contactor according to the control object, operation times and application category of the contactor. 2. Select according to the rated voltage of the line at the application location. 3. Select the rated current of the main contact of the contactor according to the load capacity. 4. About the voltage level of the lead coil ...

1. The operator panel is given The operator panel is a simple frequency setting method of the inverter, and the user can directly change the set rate of the inverter through the potentiometer, digital key or rising and descending keys on the inverter operator panel. The big advantage of the operator panel is that it is simple ...