Low pressure issues The VFD reports a low voltage issue when the drive's DC link voltage drops below 62% of the nominal level at the high setting (480 Vac) and 50% of the nominal value at the low setting (400 Vac). The +10% and -15% voltage tolerances in most manuals are the ones that claim to be ...

Starting performance is a very important performance parameter of motor products. The large starting current of the motor is an unpreventable problem in the process of direct starting. The high current during the engine process has a great impact on both the power grid and the motor itself. Therefore, according to different working conditions and different series of motors, ...

Causes of inverter failure: 1. The grid voltage is too low 2. The rated current of the motor is set incorrectly 3. The motor stall or load abrupt change is too large 4. Large horse-drawn trolley Inverter solutions: 1 ...

Inverters are widely used in all walks of life, in a variety of applications, inverters will inevitably encounter rainy and humid climate, resulting in internal wetness, or accidentally into the water, in fact, as long as it is found in time, it can still be rescued. If it is in the unpowered state ...

The fundamental principle of vector control is to control the excitation current and torque current of the asynchronous motor according to the principle of magnetic field orientation through the measurement and control of the stator current vector of the asynchronous motor, and then to achieve the purpose of controlling the torque of the asynchronous motor. Specifically, it is to ...

There are many setting parameters of the inverter, and each parameter has a certain range of choice, and the inverter can not work normally due to the improper setting of a single parameter in use, therefore, the relevant parameters must be set correctly. ...

1. The power and temperature rise of the motor Regardless of the method of the inverter, different degrees of harmonic voltage and current occur during operation, so that the motor runs under non-sinusoidal voltage and current. Rejection of material introduction, taking the sine wave PWM type inverter that is now widely used as an example, ...

1. Plan a special inverter room: When the power of the inverter used is large or the number is large, a special inverter room can be planned. The doors, windows and cable holes in the room should be sealed to prevent dust from entering; It is necessary to plan air filtration equipment and circulation channels to adhere to the normal circulation of indoor air ...

(1) The starting torque is large and the power factor is high. Because the power factor of the motor is related to the working frequency, the power factor under the power frequency power supply is much lower than that under the low-frequency power supply when the motor is running at low speed. The inverter can control the motor from low frequencies and ...

1. See if it is energy-saving. When selecting equipment products, many business managers will take into account the energy-saving embodiment, which is due to the excellent energy-saving embodiment of the product, which can save a lot of money and resources.

A brief introduction to the progress of the inverter in terms of torque: This function adds the output voltage of the inverter so that the output torque of the motor is proportional to the square of the voltage, so as to improve the output torque of the motor. Improve the skill of insufficient torque at low speed output of the motor, and use the "vector manipulation" ...

Water pump inverter pressure conditioning steps: 1. Open PID closed-loop control; 2. Close the pressure circuit; 3. Set the pressure feedback and set the given pressure; When the pump speed is changed, the outlet pressure can be changed. Adjust the operating frequency of the VFD. The higher the frequency, the higher the pump speed and the higher the pressure. About ...

1. The constant pressure water supply of the inverter increases the comfort of water supply by 3 times 2. Constant water pressure, reducing pipe bursts and leakage by 80% 3. High efficiency and energy saving, power saving effect up to 20%-60% (depending on the actual situation) 4. The use of frequency converters can realize multi-point pressure in different time periods.

First, select from the inverter "software". The reason why the factory chooses the inverter to work together with the fan is that it is hoped that the automation and intelligent design of the inverter technology can improve the speed regulation mode of the fan, and reduce the wasted energy consumption, which not only improves the wind efficiency.

Inverter motor - used for special occasions with inverter, it is different from the general motor in that a strong cooling fan is added. And the power of the fan comes from the independent power supply, can not be from the main motor out of the line, the effect of the strong cooling fan is to ensure that the motor at low speed...

The inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to communication), braking unit, drive unit, detection unit and microprocessor unit. The inverter adjusts the voltage and frequency of the output power supply by the internal IGBT break, and ...

In order to ensure the safe, efficient and reliable operation of the inverter, the following keys should be grasped when using the inverter: 1) It is necessary for the grounding terminal of the inverter to be firmly grounded, so as to effectively press the radio frequency disturbance and enhance the reliability of the system: the frequency conversion speed regulation system is best to use independent grounding, grounding resistance...

The inverter motor is equipped with a mechanical brake, is the inverter motor in the power generation condition when parking? Is the brake unit of the inverter working at the moment? What are the causes of brake unit damage? Answer: 1. The inverter motor is equipped with a mechanical brake, and when parking...

General treatment methods for inverter overcurrent problems: The output side of the inverter is a PWM voltage waveform, and after passing through the motor winding, the output current is approximately a sine wave, and lags behind the voltage by a phase viewpoint, which is determined by the power factor of the motor. The output current of the inverter passes through ...

Motor overload: There is no need to set overload maintenance parameters in frequency conversion. The inverter generally acquiesces to the motor overload maintenance based on the motor power. Generally, it is 1.2 times and 60 seconds will report an overload failure. The overload factor is not the same for different frequency converters. ...

1. Test rectifier circuit: To the P end and N end of the DC power supply inside the inverter, adjust the multimeter to the resistance X10 gear, the red watch rod is connected to P, and the black watch rod is separated from R, S, T, and there are tens of ohms of resistance in normal times, and it is basically balanced. Instead, connect the black watch rod to the P end, and the red watch stick will be ...