CN210927475U - Voltage conversion control circuit of power transformer demagnetizing device - Google Patents
Voltage conversion control circuit of power transformer demagnetizing device Download PDFInfo
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- CN210927475U CN210927475U CN201922269409.4U CN201922269409U CN210927475U CN 210927475 U CN210927475 U CN 210927475U CN 201922269409 U CN201922269409 U CN 201922269409U CN 210927475 U CN210927475 U CN 210927475U
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Abstract
The utility model discloses a voltage conversion control circuit of a degaussing device of a power transformer, which comprises a voltage stabilization input unit, a voltage transformation output unit and a feedback control unit; the output end of the voltage-stabilizing input unit is connected with the input end of the voltage-transforming output unit and the output end of the feedback control unit; the voltage-stabilizing input unit controls output voltage through the controllable silicon; the voltage transformation output unit changes the input voltage; the feedback control unit adjusts the output size before the output voltage is fed back to be output in a variable voltage mode. The utility model relates to a voltage conversion control circuit of power transformer demagnetizer, through silicon controlled rectifier U1 control output voltage, change voltage output through transformer TR1, the feedback of rethread optoelectronic coupler U3 feeds back, and silicon controlled rectifier U2 regulation control feedback voltage integrates the output at last, makes voltage output stable.
Description
Technical Field
The utility model relates to a power transformer demagnetizing device voltage conversion control circuit through silicon controlled rectifier U1 control output voltage, changes voltage output through transformer TR1, and the feedback is carried out in rethread optoelectronic coupler U3 feedback, and silicon controlled rectifier U2 regulation control feedback voltage integrates the output at last, makes voltage output stable.
Background
A transformer is an important device in a power system, and its safety and stability are important to the operation of the entire power system. The magnetization curve and the hysteresis loop of the ferromagnetic material of the transformer are important characteristics of the material, the residual magnetic induction intensity of the iron core of the transformer has various influences on the transformer, when the transformer is put into operation, the iron core of the transformer is saturated by the residual magnetic induction intensity of the iron core, a large amount of harmonic waves are generated in exciting current, the reactive power consumption of the transformer is increased, the misoperation of a relay protection device can be caused, and the case of main transformer tripping caused by the residual magnetism of the transformer is caused for many times at home and abroad. In addition, the high saturation of the iron core increases the magnetic leakage, which causes the body of the transformer to vibrate violently, causing the displacement of winding structure and the like, reducing the insulation capability of the transformer and affecting the service life of the transformer. In recent years, tripping and chromatographic data abnormity of a plurality of air-drop transformers occur at home and abroad, and the reasons are all caused by iron core remanence. Therefore, the problem of residual magnetism of the transformer core has to be taken into consideration.
At present, two methods of demagnetization mainly comprise a direct current method and an alternating current method at home and abroad. The conventional alternating current demagnetizing equipment can demagnetize completely, but large test equipment is needed, and the field use is troublesome. The DC demagnetizing equipment generally adopts a DC current attenuation reversing to simulate an AC working state to realize demagnetization, the method is adopted by most demagnetizer manufacturers, but the current magnitude and the current direction are not easy to control.
SUMMERY OF THE UTILITY MODEL
To the problem among the correlation technique, the utility model provides a power transformer demagnetization device voltage conversion control circuit to overcome the above-mentioned technical problem that current correlation technique exists.
The technical scheme of the utility model is realized like this:
a voltage conversion control circuit of a demagnetizing device of a power transformer comprises a voltage stabilizing input unit, a voltage transformation output unit and a feedback control unit;
the output end of the voltage stabilization input unit is connected with the input end of the voltage transformation output unit and the output end of the feedback control unit, and the output end of the voltage transformation output unit is connected with the input end of the feedback control unit;
the voltage stabilizing input unit comprises a fuse FU1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R11, a capacitor C1, a capacitor C3, a transformer X1, a rectifier bridge BR1, a diode D1, a diode D2 and a controllable silicon U1;
one end of the fuse FU1 is connected to a power supply voltage, the other end of the fuse FU1 is connected to one end of a resistor R2, one end of a capacitor C1 and a 1 st pin of a transformer X1, one end of a resistor R1 is connected to the power supply voltage, the other end of a resistor R1 is connected to one end of a resistor R3, the other end of the capacitor C1 and a 2 nd pin of a transformer X1, the other end of the resistor R2 is connected to the other end of a resistor R3, a 3 rd pin of the transformer X1 is connected to a 2 nd pin of a rectifier bridge BR1, a 4 th pin of the transformer X1 is connected to a 3 rd pin of the rectifier bridge BR1, a 1 st pin of the rectifier bridge BR1 is grounded, a 4 th pin of the rectifier bridge BR1 is connected to one end of a resistor R4, the other end of a resistor 539R 4 is connected to one end of a resistor R5, and the other end of the resistor R5 is connected to one end of the resistor R6, The anode of the diode D1, the cathode of the thyristor U1 and one end of the resistor R7 are connected, the other end of the resistor R6 is connected with one end of the capacitor C3, the cathode of the diode D1 is connected with the other end of the capacitor C3, the anode of the thyristor U1 and one end of the resistor R11, the control electrode of the thyristor U1 is connected with the other end of the resistor R7 and the cathode of the diode D2, and the anode of the diode D2 is connected with the other end of the resistor R11;
the voltage transformation output unit comprises a diode D5, a diode D6, a diode D7, a diode D8, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a transformer TR1, a resistor R12 and an inductor L1;
a cathode of the diode D5 is connected to an anode of the diode D6, a cathode of the diode D1, the other end of the capacitor C3, an anode of the thyristor U1 and one end of the resistor R11, an anode of the diode D5 is grounded, a cathode of the diode D6 is connected to one end of the capacitor C5, one end of the capacitor C7 and a 1 st pin of the transformer TR1, another end of the capacitor C5 is connected to one end of the capacitor C6 and a 2 nd pin of the transformer TR1, another end of the capacitor C6 is grounded, another end of the capacitor C7 is connected to a 4 th pin of the transformer TR1, one end of the capacitor C9, one end of the capacitor C10 and one end of the capacitor C11, and a 3 rd pin of the transformer TR1 is connected to one end of the resistor R12 and an anode of the diode D7, the other end of the resistor R12 is connected to one end of the capacitor C8, the cathode of the diode D7 is connected to the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10 and one end of the inductor L1, the other end of the inductor L1 and the other end of the capacitor C11 are both connected to an output voltage, the 5 th pin of the transformer TR1 is connected to the anode of the diode D8, the cathode of the diode D8 is connected to one end of the capacitor C12, and the 6 th pin of the transformer TR1 and the other end of the capacitor C12 are both grounded;
the feedback control unit comprises a capacitor C2, a capacitor C4, a capacitor C13, a resistor R8, a resistor R9, a resistor R10, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a voltage stabilizing diode D3, a diode D4, a controllable silicon U2, a photoelectric coupler U3 and a voltage stabilizing circuit U4;
one end of the capacitor C2 is connected to the other end of the resistor R4 and one end of the resistor R5, the other end of the capacitor C2 is connected to the anode of the diode D4, the other end of the capacitor C5, one end of the capacitor C6, the 2 nd pin of the transformer TR1 and the 3 rd pin of the photocoupler U3, the cathode of the diode D4 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the capacitor C4, one end of the resistor R9 and the cathode of the zener diode D3, the other end of the capacitor C4 is connected to the other end of the resistor R9, one end of the resistor R8, the cathode of the thyristor U2, the other end of the resistor R5, one end of the resistor R6, the anode of the diode D1, the cathode of the thyristor U1 and one end of the resistor R7, the anode of the zener diode D3 is connected to the other end of the resistor R8 and the control electrode of the thyristor U2, the anode of the thyristor U2 is connected to the anode of the diode D2 and the other end of the resistor R11, the 4 th pin of the photocoupler U3 is connected to the cathode of the diode D8 and one end of the capacitor C12, the 1 st pin of the photocoupler U3 is connected to one end of the resistor R13 and one end of the resistor R14, the other end of the resistor R13 is connected to the cathode of the diode D7, the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10 and one end of the inductor L1, the other end of the resistor R14 is connected to the 2 nd pin of the photocoupler U3, one end of the capacitor C13 and the 3 rd pin of the voltage stabilizing circuit U4, the other end of the capacitor C13 is connected to one end of the resistor R15, the 1 st pin of the voltage regulator circuit U4, and one end of the resistor R16, the other end of the resistor R15, the other end of the inductor L1, and the other end of the capacitor C11 are connected to output voltage, and the 2 nd pin of the voltage regulator circuit U4, the other end of the resistor R16, the other end of the capacitor C7, the 4 th pin of the transformer TR1, one end of the capacitor C9, one end of the capacitor C10, and one end of the capacitor C11 are connected to output voltage.
Further, the transformer X1 is a 4-pin transformer for changing the input voltage, and the transformer TR1 is a 6-pin transformer for performing integrated regulation on the input voltage.
Further, the controllable silicon U1 and the controllable silicon U2 are both unidirectional controllable silicon, the controllable silicon U1 controls the input voltage, and the controllable silicon U2 controls the feedback voltage.
Further, the photocoupler U3 is a photocoupler PC817, photocouples the output voltage and feeds the output voltage back to the voltage stabilization input unit.
Further, the voltage stabilizing circuit U4 is a voltage stabilizing circuit TL431 for stabilizing the feedback voltage.
The utility model has the advantages that: the utility model provides a power transformer demagnetizing device voltage conversion control circuit, through silicon controlled rectifier U1 control output voltage, change voltage output through transformer TR1, the feedback is carried out through optoelectronic coupler U3 feedback to the rethread, and silicon controlled rectifier U2 adjusts control feedback voltage, and the output of integrating at last makes voltage output stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a voltage conversion control circuit of a demagnetizing device of a power transformer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
According to an embodiment of the present invention, as shown in fig. 1, there is provided a voltage conversion control circuit for a demagnetizing device of a power transformer, including a voltage stabilization input unit, a voltage transformation output unit, and a feedback control unit;
the output end of the voltage stabilization input unit is connected with the input end of the voltage transformation output unit and the output end of the feedback control unit, and the output end of the voltage transformation output unit is connected with the input end of the feedback control unit;
the voltage stabilizing input unit comprises a fuse FU1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R11, a capacitor C1, a capacitor C3, a transformer X1, a rectifier bridge BR1, a diode D1, a diode D2 and a controllable silicon U1;
one end of the fuse FU1 is connected to a power supply voltage, the other end of the fuse FU1 is connected to one end of a resistor R2, one end of a capacitor C1 and a 1 st pin of a transformer X1, one end of a resistor R1 is connected to the power supply voltage, the other end of a resistor R1 is connected to one end of a resistor R3, the other end of the capacitor C1 and a 2 nd pin of a transformer X1, the other end of the resistor R2 is connected to the other end of a resistor R3, a 3 rd pin of the transformer X1 is connected to a 2 nd pin of a rectifier bridge BR1, a 4 th pin of the transformer X1 is connected to a 3 rd pin of the rectifier bridge BR1, a 1 st pin of the rectifier bridge BR1 is grounded, a 4 th pin of the rectifier bridge BR1 is connected to one end of a resistor R4, the other end of a resistor 539R 4 is connected to one end of a resistor R5, and the other end of the resistor R5 is connected to one end of the resistor R6, The anode of the diode D1, the cathode of the thyristor U1 and one end of the resistor R7 are connected, the other end of the resistor R6 is connected with one end of the capacitor C3, the cathode of the diode D1 is connected with the other end of the capacitor C3, the anode of the thyristor U1 and one end of the resistor R11, the control electrode of the thyristor U1 is connected with the other end of the resistor R7 and the cathode of the diode D2, and the anode of the diode D2 is connected with the other end of the resistor R11;
the voltage transformation output unit comprises a diode D5, a diode D6, a diode D7, a diode D8, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a transformer TR1, a resistor R12 and an inductor L1;
a cathode of the diode D5 is connected to an anode of the diode D6, a cathode of the diode D1, the other end of the capacitor C3, an anode of the thyristor U1 and one end of the resistor R11, an anode of the diode D5 is grounded, a cathode of the diode D6 is connected to one end of the capacitor C5, one end of the capacitor C7 and a 1 st pin of the transformer TR1, another end of the capacitor C5 is connected to one end of the capacitor C6 and a 2 nd pin of the transformer TR1, another end of the capacitor C6 is grounded, another end of the capacitor C7 is connected to a 4 th pin of the transformer TR1, one end of the capacitor C9, one end of the capacitor C10 and one end of the capacitor C11, and a 3 rd pin of the transformer TR1 is connected to one end of the resistor R12 and an anode of the diode D7, the other end of the resistor R12 is connected to one end of the capacitor C8, the cathode of the diode D7 is connected to the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10 and one end of the inductor L1, the other end of the inductor L1 and the other end of the capacitor C11 are both connected to an output voltage, the 5 th pin of the transformer TR1 is connected to the anode of the diode D8, the cathode of the diode D8 is connected to one end of the capacitor C12, and the 6 th pin of the transformer TR1 and the other end of the capacitor C12 are both grounded;
the feedback control unit comprises a capacitor C2, a capacitor C4, a capacitor C13, a resistor R8, a resistor R9, a resistor R10, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a voltage stabilizing diode D3, a diode D4, a controllable silicon U2, a photoelectric coupler U3 and a voltage stabilizing circuit U4;
one end of the capacitor C2 is connected to the other end of the resistor R4 and one end of the resistor R5, the other end of the capacitor C2 is connected to the anode of the diode D4, the other end of the capacitor C5, one end of the capacitor C6, the 2 nd pin of the transformer TR1 and the 3 rd pin of the photocoupler U3, the cathode of the diode D4 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the capacitor C4, one end of the resistor R9 and the cathode of the zener diode D3, the other end of the capacitor C4 is connected to the other end of the resistor R9, one end of the resistor R8, the cathode of the thyristor U2, the other end of the resistor R5, one end of the resistor R6, the anode of the diode D1, the cathode of the thyristor U1 and one end of the resistor R7, the anode of the zener diode D3 is connected to the other end of the resistor R8 and the control electrode of the thyristor U2, the anode of the thyristor U2 is connected to the anode of the diode D2 and the other end of the resistor R11, the 4 th pin of the photocoupler U3 is connected to the cathode of the diode D8 and one end of the capacitor C12, the 1 st pin of the photocoupler U3 is connected to one end of the resistor R13 and one end of the resistor R14, the other end of the resistor R13 is connected to the cathode of the diode D7, the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10 and one end of the inductor L1, the other end of the resistor R14 is connected to the 2 nd pin of the photocoupler U3, one end of the capacitor C13 and the 3 rd pin of the voltage stabilizing circuit U4, the other end of the capacitor C13 is connected to one end of the resistor R15, the 1 st pin of the voltage regulator circuit U4, and one end of the resistor R16, the other end of the resistor R15, the other end of the inductor L1, and the other end of the capacitor C11 are connected to output voltage, and the 2 nd pin of the voltage regulator circuit U4, the other end of the resistor R16, the other end of the capacitor C7, the 4 th pin of the transformer TR1, one end of the capacitor C9, one end of the capacitor C10, and one end of the capacitor C11 are connected to output voltage.
In this embodiment, an input voltage is filtered through a filter circuit composed of the resistor R2, the resistor R3, and the capacitor C1, the fuse FU1 fuses a protection circuit when the voltage is too high, the fuse FU1 is adjusted for the first time through the transformer X1, and then rectified through the rectifier bridge BR1, and then passed through the thyristor U1, at this time, the voltage of the capacitor C4 is lower than that of the capacitor C2, the thyristor U1 is turned on, the thyristor U2 is turned off, the input voltage is normally output, and is divided through a voltage dividing circuit composed of the resistor R6, the capacitor C3, and the diode D1, and then enters a voltage transformation output unit through the diode D6, and after the second adjustment of the transformer TR1, the voltage dividing circuit composed of the resistor R12, the capacitor C8, and the diode D7, and then passed through the capacitor C9, the capacitor C10, the inductor C10, the L1, the capacitor L1, The filter circuit formed by the capacitor C11 filters and outputs again, the output voltage at the moment is stabilized by the voltage stabilizing circuit U4 and then is coupled with another path of voltage transformation output to feed back to the input voltage through a photoelectric coupler, the voltage of the charged capacitor C4 is increased and exceeds the voltage of the capacitor C2, the silicon controlled rectifier U2 is switched on, the silicon controlled rectifier U1 is switched off, and the input voltage and the feedback voltage are integrated and output.
To sum up, with the aid of the above technical scheme of the utility model, through designing a power transformer demagnetizer voltage conversion control circuit, through silicon controlled rectifier U1 control output voltage, change voltage output through transformer TR1, the feedback is carried out in the feedback of rethread optoelectronic coupler U3, and silicon controlled rectifier U2 adjusts control feedback voltage, integrates the output at last, makes voltage output stable.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A voltage conversion control circuit of a demagnetizing device of a power transformer is characterized by comprising a voltage stabilizing input unit, a voltage transformation output unit and a feedback control unit;
the output end of the voltage stabilization input unit is connected with the input end of the voltage transformation output unit and the output end of the feedback control unit, and the output end of the voltage transformation output unit is connected with the input end of the feedback control unit;
the voltage stabilizing input unit comprises a fuse FU1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R11, a capacitor C1, a capacitor C3, a transformer X1, a rectifier bridge BR1, a diode D1, a diode D2 and a controllable silicon U1;
one end of the fuse FU1 is connected to a power supply voltage, the other end of the fuse FU1 is connected to one end of a resistor R2, one end of a capacitor C1 and a 1 st pin of a transformer X1, one end of a resistor R1 is connected to the power supply voltage, the other end of a resistor R1 is connected to one end of a resistor R3, the other end of the capacitor C1 and a 2 nd pin of a transformer X1, the other end of the resistor R2 is connected to the other end of a resistor R3, a 3 rd pin of the transformer X1 is connected to a 2 nd pin of a rectifier bridge BR1, a 4 th pin of the transformer X1 is connected to a 3 rd pin of the rectifier bridge BR1, a 1 st pin of the rectifier bridge BR1 is grounded, a 4 th pin of the rectifier bridge BR1 is connected to one end of a resistor R4, the other end of a resistor 539R 4 is connected to one end of a resistor R5, and the other end of the resistor R5 is connected to one end of the resistor R6, The anode of the diode D1, the cathode of the thyristor U1 and one end of the resistor R7 are connected, the other end of the resistor R6 is connected with one end of the capacitor C3, the cathode of the diode D1 is connected with the other end of the capacitor C3, the anode of the thyristor U1 and one end of the resistor R11, the control electrode of the thyristor U1 is connected with the other end of the resistor R7 and the cathode of the diode D2, and the anode of the diode D2 is connected with the other end of the resistor R11;
the voltage transformation output unit comprises a diode D5, a diode D6, a diode D7, a diode D8, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a transformer TR1, a resistor R12 and an inductor L1;
a cathode of the diode D5 is connected to an anode of the diode D6, a cathode of the diode D1, the other end of the capacitor C3, an anode of the thyristor U1 and one end of the resistor R11, an anode of the diode D5 is grounded, a cathode of the diode D6 is connected to one end of the capacitor C5, one end of the capacitor C7 and a 1 st pin of the transformer TR1, another end of the capacitor C5 is connected to one end of the capacitor C6 and a 2 nd pin of the transformer TR1, another end of the capacitor C6 is grounded, another end of the capacitor C7 is connected to a 4 th pin of the transformer TR1, one end of the capacitor C9, one end of the capacitor C10 and one end of the capacitor C11, and a 3 rd pin of the transformer TR1 is connected to one end of the resistor R12 and an anode of the diode D7, the other end of the resistor R12 is connected to one end of the capacitor C8, the cathode of the diode D7 is connected to the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10 and one end of the inductor L1, the other end of the inductor L1 and the other end of the capacitor C11 are both connected to an output voltage, the 5 th pin of the transformer TR1 is connected to the anode of the diode D8, the cathode of the diode D8 is connected to one end of the capacitor C12, and the 6 th pin of the transformer TR1 and the other end of the capacitor C12 are both grounded;
the feedback control unit comprises a capacitor C2, a capacitor C4, a capacitor C13, a resistor R8, a resistor R9, a resistor R10, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a voltage stabilizing diode D3, a diode D4, a controllable silicon U2, a photoelectric coupler U3 and a voltage stabilizing circuit U4;
one end of the capacitor C2 is connected to the other end of the resistor R4 and one end of the resistor R5, the other end of the capacitor C2 is connected to the anode of the diode D4, the other end of the capacitor C5, one end of the capacitor C6, the 2 nd pin of the transformer TR1 and the 3 rd pin of the photocoupler U3, the cathode of the diode D4 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the capacitor C4, one end of the resistor R9 and the cathode of the zener diode D3, the other end of the capacitor C4 is connected to the other end of the resistor R9, one end of the resistor R8, the cathode of the thyristor U2, the other end of the resistor R5, one end of the resistor R6, the anode of the diode D1, the cathode of the thyristor U1 and one end of the resistor R7, the anode of the zener diode D3 is connected to the other end of the resistor R8 and the control electrode of the thyristor U2, the anode of the thyristor U2 is connected to the anode of the diode D2 and the other end of the resistor R11, the 4 th pin of the photocoupler U3 is connected to the cathode of the diode D8 and one end of the capacitor C12, the 1 st pin of the photocoupler U3 is connected to one end of the resistor R13 and one end of the resistor R14, the other end of the resistor R13 is connected to the cathode of the diode D7, the other end of the capacitor C8, the other end of the capacitor C9, the other end of the capacitor C10 and one end of the inductor L1, the other end of the resistor R14 is connected to the 2 nd pin of the photocoupler U3, one end of the capacitor C13 and the 3 rd pin of the voltage stabilizing circuit U4, the other end of the capacitor C13 is connected to one end of the resistor R15, the 1 st pin of the voltage regulator circuit U4, and one end of the resistor R16, the other end of the resistor R15, the other end of the inductor L1, and the other end of the capacitor C11 are connected to output voltage, and the 2 nd pin of the voltage regulator circuit U4, the other end of the resistor R16, the other end of the capacitor C7, the 4 th pin of the transformer TR1, one end of the capacitor C9, one end of the capacitor C10, and one end of the capacitor C11 are connected to output voltage.
2. The voltage conversion control circuit of claim 1, wherein the transformer X1 is a 4-pin transformer and the transformer TR1 is a 6-pin transformer.
3. The voltage conversion control circuit of claim 1, wherein the thyristors U1 and U2 are all unidirectional thyristors.
4. The voltage conversion control circuit of a power transformer demagnetizing device according to claim 1, wherein the photocoupler U3 is a photocoupler PC 817.
5. The voltage conversion control circuit of the demagnetizing device of power transformer as claimed in claim 1, wherein said regulator circuit U4 is a regulator circuit TL 431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922269409.4U CN210927475U (en) | 2019-12-17 | 2019-12-17 | Voltage conversion control circuit of power transformer demagnetizing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922269409.4U CN210927475U (en) | 2019-12-17 | 2019-12-17 | Voltage conversion control circuit of power transformer demagnetizing device |
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| CN210927475U true CN210927475U (en) | 2020-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600425A (en) * | 2020-12-02 | 2021-04-02 | 南京民联仪器制造有限公司 | Low-current controllable rectifier working in ultralow-frequency dielectric loss measuring device and rectification control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600425A (en) * | 2020-12-02 | 2021-04-02 | 南京民联仪器制造有限公司 | Low-current controllable rectifier working in ultralow-frequency dielectric loss measuring device and rectification control method thereof |
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