CN218733937U - Thyristor rectifier circuit with synchronous signal redundancy - Google Patents

Abstract

The utility model relates to the technical field of electronic circuits, in particular to a thyristor rectifier circuit with synchronous signal redundancy; the valve side synchronous module is electrically connected with the filtering unit, the filtering unit is electrically connected with the rectifying unit, the valve side synchronous module comprises three groups of voltage division units, each group of voltage division unit is electrically connected with the filtering unit, each voltage division unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a triode Q1, and the resistor R2 is electrically connected with the resistor R1; resistance R3 respectively with resistance R1 and resistance R2 electric connection, triode Q1 respectively with resistance R3 and filter unit electric connection, through above-mentioned structure, obtain the effect that improves thyristor rectifier circuit's control accuracy.

Description

Thyristor rectifier circuit with synchronous signal redundancy

Technical Field

The utility model relates to an electronic circuit technical field especially relates to a thyristor rectifier circuit with synchronous signal is redundant.

Background

At present, a synchronous signal circuit plays an important role in a thyristor rectification circuit, the precision and the speed of acquisition and response of the synchronous signal circuit directly influence the output result circuit of the rectification circuit, a synchronous transformer is adopted to realize power isolation, voltage reduction and phase matching to obtain a synchronous voltage signal, and the synchronous voltage signal is subjected to zero crossing point detection by a zero detection circuit and is subjected to waveform setting and extraction. The three-phase power input of the synchronous transformer is directly taken from a main circuit, the transistor is triggered through a current-limiting resistor after voltage reduction, the transistor is triggered and conducted after each phase voltage rises to a zero crossing point, and a synchronous signal is generated after setting.

The essence of the synchronous circuit is that the control signal of the thyristor needs to be synchronized with the voltage of the rectifying circuit, but when the alternating voltage of the main loop generates zero drift, the time lag of the transformer can destroy the consistency of the control signal of the thyristor and the voltage phase of the rectifying circuit, so that the phase relation between the preset synchronous transformer and the preset rectifying transformer can be destroyed, and the control precision is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thyristor rectifier circuit with synchronous signal is redundant has solved the not good problem of thyristor rectifier circuit control accuracy.

In order to achieve the above object, the thyristor rectifier circuit with synchronous signal redundancy of the present invention comprises a valve side synchronous module, a filtering unit and a rectifying unit, wherein the valve side synchronous module is electrically connected with the filtering unit, and the filtering unit is electrically connected with the rectifying unit;

the valve side synchronization module comprises three groups of voltage division units, and each group of voltage division units is electrically connected with the filtering unit respectively;

the voltage division unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a triode Q1, the resistor R2 is electrically connected with the resistor R1, the resistor R3 is respectively electrically connected with the resistor R1 and the resistor R2, and the triode Q1 is respectively electrically connected with the resistor R3 and the filter unit.

The rectifying unit comprises a rectifier transformer, a triode TV1, a triode TV2, a triode TV3, a triode TV4, a triode TV5 and a triode TV6, each group of voltage division units is electrically connected with the rectifier transformer, the triode TV1 is electrically connected with the triode TV2 and the triode TV3, the triode TV5 is electrically connected with the triode TV3 and the triode TV4, and the triode TV6 is electrically connected with the triode TV2, the triode TV3 and the triode TV 4.

Wherein, the filtering unit includes triode A1, triode A2, triode A3, resistance R5, resistance R6, resistance R7, resistance R8, resistance RQ, resistance Req1, resistance Req2, electric capacity C1 and electric capacity C2, triode A1 respectively with resistance R5, resistance RQ resistance R8 with resistance Req1 electric connection, triode A2 respectively with resistance R6, resistance Req1 capacitance C1 resistance Req2 electric connection, triode A3 respectively with resistance R7, electric capacity C2 with resistance Req2 electric connection.

The filtering unit comprises a capacitor C3, a capacitor C4, a switch S1, a switch S2 and a triode A4, wherein the triode A4 is respectively electrically connected with the switch S1 and the capacitor C4, the switch S2 is electrically connected with the switch S1, and the capacitor C3 is electrically connected with the switch S2.

The utility model discloses a thyristor rectifier circuit with synchronous signal is redundant, the synchronous module of valve side includes three groups the partial pressure unit, in the partial pressure unit resistance R1 with resistance R2 reaches the partial pressure effect, right triode Q1 provides suitable input signal, resistance R3 can be controlled triode Q1 electric current, resistance R4 can be controlled triode Q1 output voltage signal, valve side synchronous module's voltage signal all the time with triode Q1 exchanges the phase difference of inlet wire voltage and is zero, and synchronous phase precision is high, obtains the improvement thyristor rectifier circuit's with synchronous signal is redundant effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 structural diagram of a valve-side synchronization module according to the present invention.

Fig. 2 is a schematic structural diagram of the thyristor rectifier circuit with synchronous signal redundancy of the present invention.

Fig. 3 is a schematic structural diagram of a filtering unit according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a filtering unit according to a second embodiment of the present invention.

Detailed Description

The first embodiment:

referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a valve side synchronization module, fig. 2 is a schematic structural diagram of a thyristor rectifier circuit with synchronization signal redundancy, and fig. 3 is a schematic structural diagram of a filter unit.

The utility model provides a thyristor rectifier circuit with synchronous signal redundancy, including valve side synchronization module, filtering unit and rectification unit, valve side synchronization module with filtering unit electric connection, filtering unit with rectification unit electric connection;

the valve side synchronization module comprises three groups of voltage division units, and each group of voltage division units is electrically connected with the filtering unit respectively;

the voltage division unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a triode Q1, the resistor R2 is electrically connected with the resistor R1, the resistor R3 is respectively electrically connected with the resistor R1 and the resistor R2, and the triode Q1 is respectively electrically connected with the resistor R3 and the filter unit.

Further, the rectifying unit comprises a rectifier transformer, a triode TV1, a triode TV2, a triode TV3, a triode TV4, a triode TV5 and a triode TV6, each group of the voltage division units is electrically connected with the rectifier transformer, the triode TV1 is electrically connected with the triode TV2 and the triode TV3, the triode TV5 is electrically connected with the triode TV3 and the triode TV4, and the triode TV6 is electrically connected with the triode TV2, the triode TV3 and the triode TV 4.

Further, the filtering unit includes a triode A1, a triode A2, a triode A3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor RQ, a resistor Req1, a resistor Req2, a capacitor C1, and a capacitor C2, the triode A1 is electrically connected to the resistor R5, the resistor RQ, the resistor R8, and the resistor Req1 respectively, the triode A2 is electrically connected to the resistor R6, the resistor Req1, the capacitor C1, and the resistor Req2 respectively, and the triode A3 is electrically connected to the resistor R7, the capacitor C2, and the resistor Req2 respectively.

In this embodiment, the valve side synchronization module includes three groups of voltage dividing units, the resistors R1 and R2 in the voltage dividing units achieve a voltage dividing effect, a suitable input signal is provided for the transistor Q1, the resistor R3 can control the current of the transistor Q1, the resistor R4 can control the voltage signal output by the transistor Q1, the phase difference between the voltage signal of the valve side synchronization module and the ac incoming line voltage of the transistor Q1 is always zero, the synchronization phase precision is high, and the effect of improving the thyristor rectification circuit with synchronization signal redundancy is obtained; the filtering unit adopts a state variable filter, the secondary level of the rectifier transformer is rich in harmonic components, the harmonic amplitude is large, and the synchronous voltage is seriously distorted, so that the filtering unit is used for filtering synchronous signals obtained by the valve side.

Second embodiment:

referring to fig. 1, fig. 2 and fig. 4, wherein fig. 1 is a schematic structural diagram of a valve side synchronization module, fig. 2 is a schematic structural diagram of a thyristor rectifier circuit with synchronization signal redundancy, and fig. 4 is a schematic structural diagram of a filter unit.

The utility model provides a thyristor rectifier circuit with synchronous signal redundancy, including valve side synchronization module, filtering unit and rectification unit, valve side synchronization module with the filtering unit electric connection, the filtering unit with the rectification unit electric connection;

the valve side synchronization module comprises three groups of voltage division units, and each group of voltage division units is electrically connected with the filtering unit respectively;

the voltage division unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a triode Q1, the resistor R2 is electrically connected with the resistor R1, the resistor R3 is respectively electrically connected with the resistor R1 and the resistor R2, and the triode Q1 is respectively electrically connected with the resistor R3 and the filter unit.

Further, the rectifying unit comprises a rectifier transformer, a triode TV1, a triode TV2, a triode TV3, a triode TV4, a triode TV5 and a triode TV6, each group of the voltage division units is electrically connected with the rectifier transformer, the triode TV1 is electrically connected with the triode TV2 and the triode TV3, the triode TV5 is electrically connected with the triode TV3 and the triode TV4, and the triode TV6 is electrically connected with the triode TV2, the triode TV3 and the triode TV 4.

Further, the filtering unit includes a capacitor C3, a capacitor C4, a switch S1, a switch S2, and a transistor A4, the transistor A4 is electrically connected to the switch S1 and the capacitor C4, the switch S2 is electrically connected to the switch S1, and the capacitor C3 is electrically connected to the switch S2.

In this embodiment, the valve side synchronization module includes three groups of voltage dividing units, the resistors R1 and R2 in the voltage dividing units achieve a voltage dividing effect, a suitable input signal is provided for the transistor Q1, the resistor R3 can control the current of the transistor Q1, the resistor R4 can control the voltage signal output by the transistor Q1, the phase difference between the voltage signal of the valve side synchronization module and the ac incoming line voltage of the transistor Q1 is always zero, the synchronization phase precision is high, and the effect of improving the thyristor rectification circuit with synchronization signal redundancy is obtained; the filtering unit adopts a switched capacitor filter, the secondary of the rectifier transformer is rich in harmonic component, the harmonic amplitude is large, and the synchronous voltage is seriously distorted, so that the filtering unit is used for filtering synchronous signals obtained from a valve side, a circuit of the switched capacitor filter is essentially a data system and directly processes analog continuous signals, the switch S1 and the switch S2 are used for replacing a resistor in the filter, the switch S1 and the switch S2 work in a discrete domain, the switch S can be applied to a scene that the filtering of the synchronous voltage signals requires high response speed, the topological structure does not need to be changed when parameters are changed, the control on the center frequency, the quality factor and the gain with higher precision is realized by using an analog electronic circuit.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (4)

1. A thyristor rectifier circuit with synchronous signal redundancy is characterized in that,

the valve side synchronous module is electrically connected with the filtering unit, and the filtering unit is electrically connected with the rectifying unit;

the valve side synchronization module comprises three groups of voltage division units, and each group of voltage division units is electrically connected with the filtering unit respectively;

the voltage division unit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a triode Q1, the resistor R2 is electrically connected with the resistor R1, the resistor R3 is respectively electrically connected with the resistor R1 and the resistor R2, and the triode Q1 is respectively electrically connected with the resistor R3 and the filter unit.

2. The thyristor rectifier circuit with synchronous signal redundancy of claim 1,

the rectifying unit comprises a rectifying transformer, a triode TV1, a triode TV2, a triode TV3, a triode TV4, a triode TV5 and a triode TV6, each group of voltage division units is respectively and electrically connected with the rectifying transformer, the triode TV1 is respectively and electrically connected with the triode TV2 and the triode TV3, the triode TV5 is respectively and electrically connected with the triode TV3 and the triode TV4, and the triode TV6 is respectively and electrically connected with the triode TV2, the triode TV3 and the triode TV 4.

3. The thyristor rectifier circuit with synchronous signal redundancy of claim 1,

the filtering unit comprises a triode A1, a triode A2, a triode A3, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor RQ, a resistor Req1, a resistor Req2, a capacitor C1 and a capacitor C2, wherein the triode A1 is respectively connected with the resistor R5, the resistor RQ, the resistor R8 and the resistor Req1 electrically connected, the triode A2 is respectively connected with the resistor R6, the resistor Req1, the capacitor C1, the resistor Req2 electrically connected, and the triode A3 is respectively connected with the resistor R7, the capacitor C2 and the resistor Req2 electrically connected.

4. The thyristor rectifier circuit with synchronous signal redundancy of claim 1,

the filtering unit comprises a capacitor C3, a capacitor C4, a switch S1, a switch S2 and a triode A4, wherein the triode A4 is respectively electrically connected with the switch S1 and the capacitor C4, the switch S2 is electrically connected with the switch S1, and the capacitor C3 is electrically connected with the switch S2.

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