Q:How does the variable frequency motor output torque at very low frequencies?

Low frequency, the motor torque is relatively low, generally VF inverter performance is good or bad, the price level reflected in this time. But there is torque to enhance the function, it will not move without moving. If no load can not start, check the motor card and other mechanical problems such as whether there is a problem.

Q:Who knows how the inverter is calculated?

The synchronous speed of the two-pole motor is 3000 rpm,

Q:The inverter flat rate transferred to 29, on the submersible pump to burn the coil ?!

1. submersible pumps are generally the problem, far away from the reflection voltage, the pump insulation breakdown, in particular, to better pump. 2. Distance away, the inverter and pump connection thicker. 3. Then on the output filter.

Q:65w adapter and 90w laptop power adapter What is the difference?

In general, notebooks have to use power consumption is to decide whether to use 65W or 90W adapter power supply, but not to say that 90W must not use the 65W power supply, but his power is not reached, it is possible that the machine is using some of the features Can not start, for example, external equipment, power supply, if the original request is 90W power supply, but you are using the 65W power supply, external equipment can not work properly. But some cases do not need external equipment, so choose a small 65W power supply is very convenient

Q:A 4-pole AC motor into a 2-pole AC motor, the motor is controlled by the inverter, to make the maximum speed of the 2-pole motor and the original 4-pole

First reduce the frequency of about one-third of the test, not the case, then appropriate adjustments!

Q:What is the difference between variable frequency motor and variable speed motor?

The variable frequency motor requirements are high, are special motor, so the general motor can not use the inverter to speed. According to the above formula, it can be seen that increasing the frequency, the motor speed will be faster, reduce the frequency of the motor speed is slow, variable frequency motor core is also a special material, because the ferromagnetic material There is a saturation period, to the saturation period, regardless of whether the motor current increases, the motor will not continue to increase the intensity of the magnetic field,

Q:Delta VFD-F frequency converter how to adjust the number of poles

Go to the official website of some inside a detailed description

Q:Will the 75KW4 pole motor can be used to increase the speed of the inverter?

Can not, only slow down, on our national grid, 50HZ is the largest. At least with the inverter can not be achieved.

Q:What is the single axis of the inverter and multi-axis applications

Inverter is mainly used for AC motor (asynchronous motor or synchronous motor) speed adjustment, is recognized as the AC motor the best and most promising speed control program, in addition to excellent speed performance, the inverter is also significant Energy-saving effect, is the enterprise technological transformation and product upgrading of the ideal speed control device. Since the introduction of China since the 80s of last century, the frequency converter as energy-saving applications and speed of process control more and more important automation equipment, has been rapid development and wide application.

Q:What are the differences and links between the soft starters and the frequency converters, and their respective principles and uses?

Soft starters and frequency converters are two completely different uses of the product. The frequency converter is used for the need for speed control where the output not only changes the voltage but also changes the frequency; the soft starter is actually a voltage regulator for the motor to start when the output only changes the voltage and does not change the frequency. The frequency converter has all the soft starter functions, but its price is much more expensive than the soft starter, the structure is much more complex. Soft starter (soft starter) is a set of motor soft start, soft stop, light load energy saving and a variety of protection functions in one of the new motor control device, known as the Soft Starter abroad. The softener uses a three-phase anti-parallel thyristor as a voltage regulator, which connects it between the power supply and the motor stator. This circuit, such as three-phase full-bridge rectifier circuit. When using the soft starter to start the motor, the output voltage of the thyristor gradually increases, the motor gradually accelerates until the thyristor is fully conductive, the motor works at the mechanical characteristics of the rated voltage, smooth start, reduce the starting current and avoid starting the overcurrent trip. When the motor reaches the rated speed, the start-up process ends, the soft starter automatically uses the bypass contactor to replace the completed thyristor, providing the rated voltage for the normal operation of the motor to reduce the heat loss of the thyristor and prolong the service life of the soft starter , To improve its efficiency, but also to avoid the harmonic pollution to the grid. Soft starter also provides soft stop function, soft stop and soft start the process of reverse, the voltage gradually reduced, the number of revolutions gradually reduced to zero, to avoid free-wheeling caused by the impact of torque. How the frequency converter works