CN201290070Y

CN201290070Y - Extra-high voltage DC generator

Info

Publication number: CN201290070Y
Application number: CNU2008201379547U
Authority: CN
Inventors: 张毓麟; 鲍清华
Original assignee: Suzhou Huadian Electric Technology Co Ltd
Current assignee: Suzhou Huadian Electric Co Ltd
Priority date: 2008-11-07
Filing date: 2008-11-07
Publication date: 2009-08-12
Anticipated expiration: 2018-11-07

Abstract

The utility model relates to an ultra-high voltage direct current generator, which comprises a rectifying filter circuit, a voltage stabilizing circuit, a voltage stabilizing control circuit, a bridge-type inversion output circuit and a voltage doubling rectifying and high-voltage output circuit. The voltage doubling rectifying and high-voltage output circuit comprises a transformer provided with a primary winding and two secondary windings, wherein, the primary winding is connected with the output terminal of the bridge-type inversion output circuit, non-dotted terminals of the first secondary winding are connected with dotted terminals of the second secondary winding and are earthed; each secondary winding is connected with a multistage voltage doubling circuit; and the multistage voltage doubling circuits on the two secondary windings are arranged symmetrically. Since the multistage voltage doubling circuits are symmetrically arranged on the two secondary windings, the opposite ripple currents of the two circuits balance each other out, in addition, the ripple of the output voltage can be reduced greatly by properly adjusting the stage number of the voltage doubling circuit and the capacitance of the capacitor.

Description

A kind of extra-high voltage direct-current generator

Technical field

The utility model relates to a kind of high-voltage D.C. generator, particularly a kind of generator of exporting extra-high voltage direct-current.

Background technology

The extra-high voltage direct-current power supply adopts voltage multiplying rectifier high-voltage output circuit output high direct voltage usually, voltage multiplying rectifier high-voltage output circuit of the prior art comprises a transformer, Secondary winding of transformer is connected with a C-W voltage-multiplying circuit, the C-W voltage-multiplying circuit was proposed by COCCROFT and WALTON in 1932, its common topological structure as shown in Figure 3, shown in this figure is 3 rank voltage-multiplying circuits, the end of the same name of secondary winding is connected with capacitor C 4 one pins, another pin of capacitor C 4 links to each other with diode D1 negative pole and diode D2 positive pole, diode D1 plus earth, capacitor C 1 is serially connected between the negative pole of the positive pole of diode D1 and diode D2, the negative pole of diode D2 is connected with the positive pole of triode D3, capacitor C 5 is serially connected between diode D2 positive pole and the diode D3 negative pole, the positive pole of diode D3 negative pole and diode D4 joins, capacitor C 2 is serially connected between the negative pole of diode D3 positive pole and diode D4, the positive pole of diode D4 negative pole and diode D5 joins, capacitor C 6 is serially connected between diode D4 positive pole and the diode D5 negative pole, diode D5 negative pole and diode D6 positive pole join, capacitor C 3 is serially connected between diode D5 positive pole and the diode D6 negative pole, diode D6 negative pole is voltage output end HV, usually per 2 times is single order, therefore, Figure 3 shows that 3 rank, 6 voltage-multiplying circuits, can rectifying tube and electric capacity be added up according to the needs that use according to the diagram method of attachment, realize the topology of voltage-multiplying circuit, the existing operation principle that briefly introduces this voltage-multiplying circuit in conjunction with Fig. 3:

AC power half cycle is to C4, C5, C6 charging during this circuit working, and C1, C2, C3 discharge, when entering another half cycle, and C4, C5, C6 discharge, and C1, C2, C3 charging, so the ripple frequency of output HV is the frequency of transformer input.But this voltage-multiplying circuit is because electric capacity is discharged in series, and ripple is bigger, thereby influences the high direct voltage of extra-high voltage direct-current generator output.

The utility model content

The utility model purpose is the extra-high voltage direct-current generator that a kind of ultralow ripple is provided in order to overcome the deficiencies in the prior art.

For achieving the above object, the technical solution adopted in the utility model is: a kind of extra-high voltage direct-current generator, comprise that the electric main that is used for input is converted to galvanic current rectifying and wave filtering circuit, the voltage stabilizing circuit that is electrically connected with the output of described current rectifying and wave filtering circuit, be connected with the input of described voltage stabilizing circuit and be used to control the controlling circuit of voltage regulation of voltage stabilizing circuit output, be electrically connected with described circuit output end of pressure-stabilizing and be used for the direct current of voltage stabilizing circuit output is converted to the bridge type inverse output circuit of alternating current, be electrically connected with the output of described inverter output circuit and be used for the voltage multiplying rectifier high-voltage output circuit that the alternating current with the output of bridge type inverse output circuit converts direct current to and amplifies, described voltage multiplying rectifier high-voltage output circuit comprises a transformer, described transformer has an elementary winding and two secondary level windings, the elementary winding of described transformer is connected with the output of described bridge type inverse output circuit, the different name end of the first secondary grade winding of described transformer is connected and joins with ground with the end of the same name of the second secondary grade winding, each secondary level winding is connected with multistage voltage-multiplying circuit, and the symmetrical setting of multistage voltage-multiplying circuit on two secondary level windings.

The exponent number of described multistage voltage doubling rectifing circuit is 2～6 rank.

Because the utilization of technique scheme, the utility model compared with prior art has following advantage: owing to be provided with multistage voltage-multiplying circuit symmetrically on two secondary winding of transformer, the ripple current that the two-way circuit is relative can be cancelled each other, the exponent number of suitable adjustment voltage-multiplying circuit and the size of electric capacity can make the ripple of output voltage significantly reduce.

Description of drawings

Accompanying drawing 1 is the electric theory diagram of the utility model extra-high voltage direct-current generator;

Accompanying drawing 2 is the circuit diagram of the utility model voltage multiplying rectifier high-voltage output circuit;

Accompanying drawing 3 is the circuit diagram of existing voltage multiplying rectifier high-voltage output circuit;

Wherein: 1, current rectifying and wave filtering circuit; 2, voltage stabilizing circuit; 21, first order voltage regulation unit; 22, second level voltage regulation unit; 3, controlling circuit of voltage regulation; 4, bridge type inverse output circuit; 5, voltage multiplying rectifier high-voltage output circuit;

Embodiment

Below in conjunction with accompanying drawing, describe particular content of the present utility model in detail for example:

Extra-high voltage direct-current generator as shown in Figure 1, comprise current rectifying and wave filtering circuit 1, voltage stabilizing circuit 2, controlling circuit of voltage regulation 3, bridge type inverse output circuit 4 and voltage multiplying rectifier high-voltage output circuit 5, current rectifying and wave filtering circuit 1 is transformed to direct current with the electric main of importing and inputs to voltage stabilizing circuit 2, voltage stabilizing circuit 2 carries out filtering according to the control of controlling circuit of voltage regulation 3 to the direct current of importing, thereby the galvanic current pressure is inputed in the bridge type inverse output circuit 4, described bridge type inverse output circuit 4 carries out the direct current of input to input to voltage multiplying rectifier high-voltage output circuit 5 behind the exchange conversion, alternating current is thereby that direct current and amplification obtain stable high voltage direct current through 5 rectifications of voltage multiplying rectifier high-voltage output circuit, above-mentioned current rectifying and wave filtering circuit 1, voltage stabilizing circuit 2, controlling circuit of voltage regulation 3, bridge type inverse output circuit 4 is a common circuit, it is not the present utility model main points, at this its operation principle is repeated no more.

As shown in Figure 2, described voltage multiplying rectifier high-voltage output circuit 5 comprises a transformer, this transformer comprises an elementary winding and two secondary level windings, its elementary winding is connected with the output of bridge type inverse output circuit 4, in order to receive the alternating current of bridge type inverse output circuit 4 outputs, the different name end of the first secondary grade winding of transformer is connected with the end of the same name of the second secondary grade winding, and they are ground connection respectively, two secondary level windings connect a multistage voltage-multiplying circuit respectively, and the symmetrical setting of multistage voltage-multiplying circuit on the two secondary grade windings, in the present embodiment, voltage-multiplying circuit is 3 rank voltage-multiplying circuits, the voltage-multiplying circuit that is connected with the first secondary grade winding is by capacitor C 4, C5, C6, C1, C2, C3 and diode D1, D2, D3, D4, D5, D6 forms, the voltage-multiplying circuit that is connected with the second secondary grade winding is by capacitor C 7, C8, C9, C1, C2, C3 and diode D7, D8, D9, D10, D11, D12 forms, its physical circuit annexation is as follows: the end of the same name of the first secondary grade winding is connected with a pin of capacitor C 4, another pin of capacitor C 4 is connected with the positive pole of diode D1 negative pole and diode D2 respectively, capacitor C 1 is serially connected between diode D1 positive pole and the diode D2 negative pole, diode D2 negative pole and diode D3 positive pole join, capacitor C 5 is serially connected between diode D2 positive pole and the diode D3 negative pole, diode D3 negative pole and diode D4 positive pole join, capacitor C 2 is serially connected between diode D3 positive pole and the diode D4 negative pole, diode D4 negative pole and diode D5 positive pole join, capacitor C 6 is serially connected between diode D4 positive pole and the diode D5 negative pole, diode D5 negative pole and diode D6 positive pole join, and capacitor C 3 is serially connected between diode D5 positive pole and the diode D6 negative pole; The different name end of the second secondary grade winding is connected with capacitor C 7 one pins, capacitor C 7 another pins are connected with diode D7 negative pole and diode D8 positive pole, and diode D7 is anodal to join with diode D1 positive pole, diode D8 negative pole is connected with diode D2 negative pole, capacitor C 8 is serially connected between diode D8 positive pole and the diode D9 negative pole, diode D9 is anodal to be connected with diode D3 positive pole, diode D9 negative pole and diode D10 positive pole join, diode D10 negative pole and diode D4 negative pole join, capacitor C 9 is serially connected between diode D10 positive pole and the diode D11 negative pole, diode D11 is anodal to join with diode D5 positive pole, diode D12 is anodal to join with diode D11 negative pole, diode D12 negative pole is connected with diode D6 negative pole, and diode D6 negative pole and diode D11 negative pole are voltage output end HV.

When the alternating current input is arranged, the preceding half cycle capacitor C 4 of interchange, C5, C6 discharge, capacitor C 1, C2, C3 charging, capacitor C 7, C8, C9 charging; Capacitor C 4, C5, C6 charging during second half, capacitor C 1, C2, C3 charging, capacitor C 7, C8, C9 discharge.Find out that thus high-voltage output end HV is in charged state in the positive-negative half-cycle that exchanges, so the ripple frequency of output voltage is the twice of transformer incoming frequency, thereby makes the ripple of output lower, guaranteed the accuracy of extra-high voltage direct-current generator.

Claims

1, a kind of extra-high voltage direct-current generator, comprise that the electric main that is used for input is converted to galvanic current rectifying and wave filtering circuit (1), the voltage stabilizing circuit (2) that is electrically connected with the output of described current rectifying and wave filtering circuit (1), be connected with the input of described voltage stabilizing circuit (2) and be used to control the controlling circuit of voltage regulation (3) of voltage stabilizing circuit (2) output, be electrically connected with described voltage stabilizing circuit (2) output and be used for the direct current of voltage stabilizing circuit (2) output is converted to the bridge type inverse output circuit (4) of alternating current, be electrically connected with the output of described inverter output circuit (4) and be used for the voltage multiplying rectifier high-voltage output circuit (5) that the alternating current with bridge type inverse output circuit (4) output converts direct current to and amplifies, it is characterized in that: described voltage multiplying rectifier high-voltage output circuit (5) comprises a transformer, described transformer has an elementary winding and two secondary level windings, the elementary winding of described transformer is connected with the output of described bridge type inverse output circuit (4), the different name end of the first secondary grade winding of described transformer is connected and joins with ground with the end of the same name of the second secondary grade winding, each secondary level winding is connected with multistage voltage-multiplying circuit, and the symmetrical setting of multistage voltage-multiplying circuit on two secondary level windings.

2, a kind of extra-high voltage direct-current generator according to claim 1, it is characterized in that: the exponent number of described multistage voltage doubling rectifing circuit is 2～6 rank.