1. Physical environment (1) Temperature factor Temperature has a huge impact on the lifetime and reliability of the electronic components inside the inverter. When using the inverter in a high operating temperature environment, it is necessary to take additional cooling measures to ensure that the ambient temperature is stable in the inverter.

1. What is a self-learning motor of inverter? Enter the motor nameplate (voltage, current, Hz rating) in the inverter parameters, and then the inverter actively measures other parameters of the motor. Second, why should the inverter learn by itself?

1. Detection of ordinary diodes Use the MF47 multimeter to measure, connect the red and black watch pens to the two ends of the diode, read the reading, and then adjust the watch pen to measure. According to the results of two measurements, the forward resistance value of the general low-power germanium diode is 300-500Ω, and the silicon diode ...

The inverter should be installed inside the control cabinet, and the following problems should be paid attention to when planning the control cabinet: 1) Heat dissipation issues: The heating of the inverter is caused by internal losses. In the inverter, the main circuit is the main circuit for the loss of each part, accounting for about 98%, and the control circuit accounts for 2%. ...

Frequency given meaning and given method The speed of the motor can be changed by changing the output frequency of the inverter. In order to adjust the output frequency of the inverter, the inverter must supply the signal of the changed frequency, which is called the frequency given signal.

1. Vibration circuit: the drainage-source and R4 of the main winding N1 and Q1 of the switching transformer are the channels for the working current of the power supply; R1 provides the starting current; The self-powered windings N2, D1, and C1 constitute the power supply voltage of the vibrating chip. The normal operation of these three links is the prerequisite for the power supply to vibrate.

First, the frequency conversion skill is only one of the many power-saving skills, including voltage regulation and current limiting, power factor compensation, phased power regulation, frequency conversion, chopping, filtering, energy feedback and other skills, even if the power saver using the principle of frequency conversion is concerned, the frequency converter is only power-saving.

A frequency converter is a device that converts power to other frequencies of power supply. The power frequency of our country is 50Hz, in the field of motors, in order to change the speed of the motor, or other performance changes, many motors choose inverter power supply. ...

1. Air conditioning load Office buildings, shopping malls and some supermarkets and factories have central air conditioning, and the electricity consumption of air conditioning is very large during the peak electricity consumption in summer. In hot weather, the electricity consumption of air conditioners in Beijing, Shanghai and Shenzhen accounts for more than 40% of peak electricity. Therefore, with inverter equipment, drag the air conditioning system ...

With the continuous progress of industrial automation, inverters have also been widely used, energy conservation and environmental protection as the core of China's industrial economy, in the direction of the sustainable development of China's industry, but also useful to promote the sustainable development of China's inverter profession, so that I ...

1. Be "confident" It is necessary to fully understand the principles of some typical circuits and be familiar with them. Guangzhou Kewo Training Center believes that drawings are dead, and the thoughts in the head are alive, able to make analogies, able to reason, and able to touch analogies. For example, switching power supply is always inseparable from ...

1. Circuit wiring (1) The input (R, S, T) and output (U, V, W) of the inverter cannot be connected incorrectly; (2) Wire diameter selection (1) The wiring of the power supply and the inverter and the wire diameter selection method of the motor of the same capacity are the same; (2) The wiring between the inverter and the motor should consider the line electricity.

1. Poor touch The metal conductor inside the terminal block is the core part of the terminal, which transmits the voltage, current or signal from the external wire or cable to the touch piece corresponding to the connector it matches. Therefore, it is necessary for the touch parts to have excellent structure, stable and reliable touch firmness.

When LS PLC is put into operation, its operation process is generally divided into three stages, namely input sampling, user program fulfillment and output rewriting. The completion of these three phases is called a scan cycle. Throughout the operation, the PLC's CPU repeatedly performs the performance at a certain scanning speed on ...

1. The voltage level of the AC contactor should be the same as the load, and the type of contactor should be suitable for the load. 2. The accounting current of the load should be less than or equal to the additional working current of the contactor. The turn-on current of the contactor is greater than the starting current of the load, and the breaking current is greater than the load ...

According to the statistical analysis of the frequency and shutdown time of the inverter's detailed common problems, the correction rate of the main power supply circuit accounts for more than 60%; The main operating parameters are not set properly, resulting in about 20% of common problems; Common problems with control circuit boards account for 15%; 5% of common problems are caused by incorrect operation and external anomalies ...

The rectified DC voltage of the rectifier contains the pulsating voltage of the power supply 6 times the frequency, and the pulsating current generated by the inverter also changes the DC voltage. The main power is the power replacement part of the power supply for the asynchronous motor voltage regulation and frequency modulation power supply, and the main power of the inverter can be roughly divided into two ...

1. Look: The normal operation of the motor has a great relationship with the surrounding environment. Therefore, during the daily inspection, check the water leakage and dripping conditions around the motor (which will cause the low insulation of the motor to form breakdown and burn out), and check whether the peripheral of the motor has affected its ventilation and heat dissipation ring.

When LS PLC is put into operation, its operation 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 ...

1. Not manifested. This situation is more common, generally in the normal condition of the external three-phase power supply, it is the switching power supply of the inverter burned, and the 24 volt power supply on the output board of the inverter terminal can be measured.

1. Energy saving The energy-saving effect of VFD is mainly manifested in the application of fans and water pumps. After the fan and pump load is selected for frequency conversion speed regulation, the power saving rate is 20% - 60%, because the actual power consumption of the fan and pump load is basically proportional to the cubic speed. When users ask for an average ...