CN212231351U - Intermediate frequency power circuit with postpositional inverter inductor - Google Patents

Abstract

The utility model provides a rearmounted intermediate frequency power supply circuit of contravariant inductance, include: the power supply comprises an inversion thyristor module KA1, an inversion thyristor module KA2, an inversion thyristor module KB1, an inversion thyristor module KB2, a resistor RJ1, a resistor RJ2, a capacitor C1, a capacitor C2, an inductor L1, an inductor L2 and an inductor L3; the input end of the inversion thyristor module KA1 and the input end of the inversion thyristor module KA2 are both connected to the positive pole CD of a power supply, the output end of the inversion thyristor module KA1 and the output end of the inversion thyristor module KA2 are both connected to one end of an inductor L1, the other end of the inductor L1 is connected to one end of an inductor L2, the other end of the inductor L2 is connected to the input end of an inversion thyristor module KB1 and the input end of an inversion thyristor module KB2, and the output end of the inversion thyristor module KB1 and the output end of the inversion thyristor module KB. The damage of the inversion silicon controlled rectifier is reduced, the materials of the two inductors are saved, and the cost is reduced.

Description

Intermediate frequency power circuit with postpositional inverter inductor

Technical Field

The utility model relates to a power supply circuit, concretely relates to rearmounted intermediate frequency power supply circuit of contravariant inductance.

Background

As shown in fig. 1, in the prior art, an intermediate frequency power circuit with a post-inverter inductor includes: the power supply comprises an inversion thyristor module KA1, an inversion thyristor module KA2, an inversion thyristor module KB1, an inversion thyristor module KB2, a resistor RJ1, a resistor RJ2, a capacitor C1, a capacitor C2, an inductor L1, an inductor L2, an inductor L3, an inductor L4 and an inductor L5, wherein the input end of the inversion thyristor module KA1 is connected to the positive pole CD + of a power supply through an inductor L1, the output end of the inversion thyristor module KA1 is connected to the input end of the inversion thyristor module KB1, and the output end of the inversion thyristor module KB1 is connected to the negative pole CD of the power supply through an inductor L3; the input end of the inversion thyristor module KA2 is connected to the positive pole CD of the power supply through an inductor L2, the output end of the inversion thyristor module KA2 is connected to the input end of the inversion thyristor module KB2, and the output end of the inversion thyristor module KB2 is connected to the negative pole CD of the power supply through an inductor L4; one end of a resistor RJ1 is connected to a power supply anode CD +, the other end of a resistor RJ1 is connected to one end of a resistor RJ2, the other end of a resistor RJ2 is connected to a power supply cathode CD +, an anode of a capacitor C1 is connected to the power supply anode CD +, a cathode of a capacitor C1 is connected to an anode of a capacitor C2, and a cathode of a capacitor C2 is connected to the power supply cathode CD-; one end of the inductor L5 is connected to a junction of the inverter thyristor module KA1 and the inverter thyristor module KB1, and is connected to a junction of the inverter thyristor module KA2 and the inverter thyristor module KB2, and the other end of the inductor L5 is connected to a junction of the capacitor C1 and the capacitor C2. The intermediate frequency power supply circuit with the rear-mounted inverter inductor has the following defects:

the inductor L1, the inductor L2, the inductor L3 and the inductor L4 adopt four inductors in total to restrain the rapid current change passing through the controlled silicon, so that material waste is caused, and the whole production cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a rearmounted intermediate frequency power supply circuit of contravariant inductance has solved prior art and has adopted four inductances to restrain the sharp current change through the silicon controlled rectifier and lead to the more problem of inductance quantity.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a rearmounted intermediate frequency power supply circuit of contravariant inductance, include: the power supply comprises an inversion thyristor module KA1, an inversion thyristor module KA2, an inversion thyristor module KB1, an inversion thyristor module KB2, a resistor RJ1, a resistor RJ2, a capacitor C1, a capacitor C2, an inductor L1, an inductor L2 and an inductor L3; the input end of the inversion thyristor module KA1 and the input end of the inversion thyristor module KA2 are both connected to the positive pole CD of a power supply, the output end of the inversion thyristor module KA1 and the output end of the inversion thyristor module KA2 are both connected to one end of an inductor L1, the other end of the inductor L1 is connected to one end of an inductor L2, the other end of an inductor L2 is connected to the input end of an inversion thyristor module KB1 and the input end of an inversion thyristor module KB2, and the output end of the inversion thyristor module KB1 and the output end of the inversion thyristor module KB 58; one end of the resistor RJ1 is connected to the positive electrode CD + of the power supply, the other end of the resistor RJ1 is connected to one end of the resistor RJ2, and the other end of the resistor RJ2 is connected to the negative electrode CD-; the positive electrode of the capacitor C1 is connected to the positive electrode CD of the power supply, the negative electrode of the capacitor C1 is connected to the positive electrode of the capacitor C2, and the negative electrode of the capacitor C2 is connected to the negative electrode CD of the power supply; one end of the inductor L3 is connected to the junction of the inductor L1 and the inductor L2 and to the junction of the resistor RJ1 and the resistor RJ2, and the other end of the inductor L3 is connected to the junction of the capacitor C1 and the capacitor C2.

Preferably, the inversion thyristor module KA1, the inversion thyristor module KA2, the inversion thyristor module KB1 and the inversion thyristor module KB2 all include: the diode comprises a thyristor T, a diode D1, a capacitor C3, a resistor RJ3, a resistor RJ4 and a diode D2, wherein the anode of the thyristor T, the cathode of the diode D1 and the anode of the capacitor C3 are connected to form an input end of an inverter thyristor module KA1, an inverter thyristor module KA2, an input end of an inverter thyristor module KB1 or an input end of an inverter thyristor module KB2, one end of the thyristor T is connected to form an output end of the inverter thyristor module KA1, the inverter thyristor module KA2, the inverter thyristor module KB1 or the inverter thyristor module KB2, the other end of the resistor RJ3 is connected to the cathode of the capacitor C3, the cathode of the capacitor C3 is connected to the anode of the diode D2 through a resistor RJ4, and the cathode of the diode D686.

Compared with the prior art, the utility model discloses following beneficial effect has:

the circuit only needs to be connected with two inversion inductors (namely, the inductor L1 and the inductor L2) so as to effectively utilize back electromotive force generated by the inductor L1 and the inductor L2 to inhibit sharp current change passing through the silicon controlled rectifier when the load current changes sharply, one inversion inductor is respectively arranged at the positive pole CD + of the power supply and the negative pole CD-of the power supply, the thyristor (namely, the inversion silicon controlled rectifier) is effectively protected, the damage of the inversion silicon controlled rectifier is reduced, meanwhile, the materials of the two inductors are saved in one power supply circuit, the cost is reduced, and the market competitiveness is improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a circuit diagram of an intermediate frequency power circuit with a post-inverter inductor in the prior art;

fig. 2 is a circuit diagram of the intermediate frequency power circuit with the rear inverter inductor of the present invention;

fig. 3 is a circuit diagram of the inversion thyristor module KA1, the inversion thyristor module KA2, the inversion thyristor module KB1 or the inversion thyristor module KB2 in fig. 2.

Detailed Description

In order to make the utility model realize that technical means, creation characteristics, achievement purpose and effect are clearer and easily understand, it is right to combine below the figure and the detailed implementation mode the utility model discloses do further explanation:

as shown in fig. 1, the utility model provides a rearmounted intermediate frequency power supply circuit of contravariant inductance, include: the power supply comprises an inversion thyristor module KA1, an inversion thyristor module KA2, an inversion thyristor module KB1, an inversion thyristor module KB2, a resistor RJ1, a resistor RJ2, a capacitor C1, a capacitor C2, an inductor L1, an inductor L2 and an inductor L3; the input end of the inversion thyristor module KA1 and the input end of the inversion thyristor module KA2 are both connected to the positive pole CD of a power supply, the output end of the inversion thyristor module KA1 and the output end of the inversion thyristor module KA2 are both connected to one end of an inductor L1, the other end of the inductor L1 is connected to one end of an inductor L2, the other end of an inductor L2 is connected to the input end of an inversion thyristor module KB1 and the input end of an inversion thyristor module KB2, and the output end of the inversion thyristor module KB1 and the output end of the inversion thyristor module KB 58; one end of the resistor RJ1 is connected to the positive electrode CD + of the power supply, the other end of the resistor RJ1 is connected to one end of the resistor RJ2, and the other end of the resistor RJ2 is connected to the negative electrode CD-; the positive electrode of the capacitor C1 is connected to the positive electrode CD of the power supply, the negative electrode of the capacitor C1 is connected to the positive electrode of the capacitor C2, and the negative electrode of the capacitor C2 is connected to the negative electrode CD of the power supply; one end of the inductor L3 is connected to the junction of the inductor L1 and the inductor L2 and to the junction of the resistor RJ1 and the resistor RJ2, and the other end of the inductor L3 is connected to the junction of the capacitor C1 and the capacitor C2.

As shown in fig. 2, the inversion thyristor module KA1, the inversion thyristor module KA2, the inversion thyristor module KB1, and the inversion thyristor module KB2 all include: the diode comprises a thyristor T, a diode D1, a capacitor C3, a resistor RJ3, a resistor RJ4 and a diode D2, wherein the anode of the thyristor T, the cathode of the diode D1 and the anode of the capacitor C3 are connected to form an input end of an inverter thyristor module KA1, an inverter thyristor module KA2, an input end of an inverter thyristor module KB1 or an input end of an inverter thyristor module KB2, one end of the thyristor T is connected to form an output end of the inverter thyristor module KA1, the inverter thyristor module KA2, the inverter thyristor module KB1 or the inverter thyristor module KB2, the other end of the resistor RJ3 is connected to the cathode of the capacitor C3, the cathode of the capacitor C3 is connected to the anode of the diode D2 through a resistor RJ4, and the cathode of the diode D686. In the conventional technology, the inversion absorption of the inversion thyristor module KA1, the inversion thyristor module KA2, the inversion thyristor module KB1 and the inversion thyristor module KB2 mostly adopts resistance-capacitance absorption (namely, the combination of the capacitor C3 and the resistor RJ 3), and has the following disadvantages: the high back-pressure pulse harmonic wave formed when the inversion silicon controlled rectifier is turned off is difficult to absorb, the safety of the inversion silicon controlled rectifier is seriously threatened by the high back-pressure pulse, a large amount of damage of the inversion silicon controlled rectifier is caused, and the maintenance cost of an intermediate frequency power circuit with a postpositional inversion inductor is increased. In the application, a chopping absorption circuit is added on the basis of resistance-capacitance absorption (namely, the resistor RJ4 and the diode D2 are used in a combined mode), high back pressure formed when the inversion silicon controlled rectifier is turned off is subjected to chopping absorption treatment through the high-speed diode D2, the high back pressure is effectively restrained and absorbed, the turn-off environment of the inversion silicon controlled rectifier (reverse voltage is generated during turn-off, and at least 30% of voltage is reduced) is increased, the safety of the silicon controlled rectifier is improved, the damage probability of the silicon controlled rectifier is reduced, and therefore the maintenance cost of an intermediate-frequency power supply circuit with the postpositional inversion inductor.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims (2)

1. The utility model provides a rearmounted intermediate frequency power supply circuit of contravariant inductance which characterized in that includes: the power supply comprises an inversion thyristor module KA1, an inversion thyristor module KA2, an inversion thyristor module KB1, an inversion thyristor module KB2, a resistor RJ1, a resistor RJ2, a capacitor C1, a capacitor C2, an inductor L1, an inductor L2 and an inductor L3;

the input end of the inversion thyristor module KA1 and the input end of the inversion thyristor module KA2 are both connected to the positive pole CD of a power supply, the output end of the inversion thyristor module KA1 and the output end of the inversion thyristor module KA2 are both connected to one end of an inductor L1, the other end of the inductor L1 is connected to one end of an inductor L2, the other end of an inductor L2 is connected to the input end of an inversion thyristor module KB1 and the input end of an inversion thyristor module KB2, and the output end of the inversion thyristor module KB1 and the output end of the inversion thyristor module KB 58;

one end of the resistor RJ1 is connected to the positive electrode CD + of the power supply, the other end of the resistor RJ1 is connected to one end of the resistor RJ2, and the other end of the resistor RJ2 is connected to the negative electrode CD-;

the positive electrode of the capacitor C1 is connected to the positive electrode CD of the power supply, the negative electrode of the capacitor C1 is connected to the positive electrode of the capacitor C2, and the negative electrode of the capacitor C2 is connected to the negative electrode CD of the power supply;

one end of the inductor L3 is connected to the junction of the inductor L1 and the inductor L2 and to the junction of the resistor RJ1 and the resistor RJ2, and the other end of the inductor L3 is connected to the junction of the capacitor C1 and the capacitor C2.

2. The inverter inductor postpositional if power supply circuit of claim 1, wherein the inverter thyristor module KA1, the inverter thyristor module KA2, the inverter thyristor module KB1 and the inverter thyristor module KB2 each comprise: the diode comprises a thyristor T, a diode D1, a capacitor C3, a resistor RJ3, a resistor RJ4 and a diode D2, wherein the anode of the thyristor T, the cathode of the diode D1 and the anode of the capacitor C3 are connected to form an input end of an inverter thyristor module KA1, an inverter thyristor module KA2, an input end of an inverter thyristor module KB1 or an input end of an inverter thyristor module KB2, one end of the thyristor T is connected to form an output end of the inverter thyristor module KA1, the inverter thyristor module KA2, the inverter thyristor module KB1 or the inverter thyristor module KB2, the other end of the resistor RJ3 is connected to the cathode of the capacitor C3, the cathode of the capacitor C3 is connected to the anode of the diode D2 through a resistor RJ4, and the cathode of the diode D686.

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