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Home Azerbaijan Technologies Device for High-Frequency Over-Voltage Rejection (Frequency-Dependent Resistor) in High-Voltage Systems and Alternating Voltage Ones

Device for High-Frequency Over-Voltage Rejection (Frequency-Dependent Resistor) in High-Voltage Systems and Alternating Voltage Ones


The main absorber of frequency-dependent resistor, which is ferromagnetic sheath, has the component the permeability of which has the maximum 0,1-20 MHz interval. As a result of this the skin-effect depth in this region strongly decreases leading to the strong increase of resistor resistance in this frequency region and the decrease of high-frequency current (over-voltage) component. The ferrite, which is used in radio engineering industry for contour frequency tuning and etc., is chosen in the capacity of ferromagnetic component. The theoretic model describing the carrying out of electromagnetic processes and functioning of resistor sheath has been formed. The production technique of ferromagnetic sheath formation has been developed and frequency-dependent resistor has been created.

Innovative Aspect and Main Advantages

The filtering of high-frequency over-voltages in the devices and high voltage systems.

Areas of Application

Power engineering, electro-technical devices, ecology.

Fig. 1 a) Voltage oscillogram: 1 - behind the frequency-dependent
resistor; 2 - before the frequency-dependent resistor;
b) The construction of frequency-dependent resistor:
1. Terminal clamp;
2. Metallic rode;
3. Sheath of frequency-dependent resistor;
4. Isolating resistor frame.

Fig. 2 The experimental (1) and theoretical (2) absorbing spectrums
of sheath of frequency-dependent resistor in frequency interval
10-107 Hz.

Stage of Development

Development stage;
Laboratory tested;
Pilot sample is available.

Contact Details

Institute of Physics
Contact person: Talat R.Mehdiyev, Arif M.Hashimov, Rauf .Mehdizadeh, Kamil Qurbanov
Address: 33, H. Javid Avenue, AZ1143, Baku, Azerbaijan
Tel./Fax: (994 12) 439 3223
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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