Variable frequency series resonance complete set device? Wuhan UHV specializes in the production of series resonance, with a wide range of product selection and professional electrical testing. To find series resonance, choose Wuhan UHV.
Principle of frequency conversion series resonance complete set device
The complete set of variable frequency series resonance equipment applies the principle of series resonance. By adjusting the output frequency of the variable frequency controller, the reactor inductance L and the sample capacitance C in the circuit undergo series resonance, and the resonance voltage is the voltage applied to the sample. The frequency conversion resonance test device is widely used in industries such as power, metallurgy, petroleum, and chemical engineering. It is suitable for the handover test and preventive test of high-capacity and high-voltage capacitive specimens, such as generators, power transformers, GIS and high cross-linking power cables, transformers, bushings, etc.
The complete set of variable frequency series resonance equipment mainly consists of a variable frequency controller, excitation transformer, high-voltage reactor, high-voltage voltage divider, etc. Variable frequency controllers are divided into two categories: desktop controllers with 20KW and above, and portable box controllers with 20KW and below; The complete set of variable frequency series resonance equipment consists of a controller and a filter. The main function of a variable frequency controller is to convert a 380V or 200V AC power frequency sine wave with fixed amplitude and frequency into a sine wave with adjustable amplitude and frequency. And provide power for the entire equipment. The function of the excitation transformer is to raise the voltage output by the variable frequency power supply to the appropriate test voltage. The high-voltage reactor L is an important component of the resonant circuit. When the power frequency is equal to 1/(2 π√ LCX), it undergoes series resonance with the test sample CX.
Characteristics of a complete set of variable frequency series resonance equipment
1. The device has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashing). The overvoltage and overcurrent protection values can be set according to user needs to trigger the flashing protection action when the test sample flashes, and the flashing voltage value can be recorded for experimental analysis
2. The entire device is lightweight, with a maximum weight of no more than 40kg, making it easy to use on site
3. The device has four working modes, which are convenient for users to flexibly choose according to the on-site situation and improve the test speed. The working modes are: fully automatic mode, manual mode, automatic tuning, and manual boost mode
4. Capable of storing and printing data in different locations, with numerical data numbers for easy identification and retrieval by users
5. When the device automatically scans the frequency, the starting point of the frequency can be set arbitrarily within the specified range, and the scanning direction can be selected upwards or downwards. At the same time, the LCD screen displays the scanning curve, making it convenient for users to intuitively understand whether they have found the resonance point
6. Adopting DSP platform technology, it is convenient to add or remove functions and upgrade according to user needs, making the human-machine exchange interface more user-friendly
Working principle of frequency conversion series resonance complete set device
The power supply is provided through a variable frequency controller, and the test voltage is initially boosted by the excitation transformer to apply high voltage to the reactor L and the test sample Cx. By changing the output frequency of the variable frequency controller, the circuit is in series resonance state, and the output voltage of the variable frequency controller is adjusted to achieve the required voltage value on the high voltage of the test sample.
The resonant frequency of the circuit depends on the capacitance Cx of the test sample and the inductance L of the reactor, with a resonant frequency of f=1/(2 π√ LC).
Characteristics of the complete set of variable frequency series resonance equipment:
1. The large screen displays test data and test status, and has real-time operation step prompts.
2. Can flexibly adjust the test voltage, frequency range, and pressurization time.
3. The experimental results can calculate the capacitance of the test sample.
4. Small size, light weight, and easy operation.
5. High resolution, frequency resolution of 0.001Hz, voltage resolution: coarse adjustment of 1%, fine adjustment of 0.01%.
6. High safety and reliability, the system has overvoltage, overcurrent, and discharge protection functions, which can protect personal and equipment safety.
7. The test results can be printed.
8. Upgradeable operating software.