An a kind of high position is got can voltage conversion circuit
Technical field
The present invention relates to a kind of voltage conversion circuit, specifically relate to an a kind of high position and get the energy voltage conversion circuit.
Background technology
Present energy-provision way at different converter valve drive plates mainly contains low force feed energy and high pressure is got energy two classes.
For most widely used in the low force feed energy be by high-frequency pulse transformer earthy energy to be delivered to the electromagnetism that is positioned on the on high-tension side drive plate to send the energy mode, this mode needs highly reliable voltage isolation measure, there are problems such as exterior insulation and structure installation, therefore the volume and the cost of equipment are all very big, and one is used for the relatively low occasion of voltage.
Get for high pressure that common having utilizes special current transformer (CT) at induced voltage from circuit in the energy, after handling, offer drive plate, be characterized in when switching device is opened, having in the circuit electric current to flow through Shi Caineng and obtain energy.This mode often is applied to the series connection valve that thyristor is a switching device, does not need to turn-off energy requirement because thyristor is the half control device.And all needing the full-controlled switch of energy device for turning on and off, this mode is difficult to satisfy the requirement of the high-power energy supply of power model.
High pressure get another common form in the energy be by the switching device parallel connection Resistor-Capacitor Unit in conjunction with certain get can element circuit for driving energy supply.This energy taking device is to utilize when rising edge appears in the switching device both end voltage to charge by electric capacity to getting, till charging meets the demands.It is mainly used in the series connection valve that thyristor is a switching device.And shorter for the switching device turn off process of high frequency, if adopt this getting mode to need a lot of cycles just can get the energy of requirement, can not satisfy power model and continue high-power energy supply requirement.
Present being seen ordinary tap power supply does not see that the report that is applied to high potential energy collecting is arranged, and its input voltage is generally 220V interchange, 380V interchange or 100V with interior direct voltage, can't satisfy the requirement of high-power module high pressure.In addition, the input voltage range of ordinary tap power supply is 3 times to the maximum, can't satisfy the requirement that power model is got the input of energy power supply wide-range voltage.
Summary of the invention
The purpose of this invention is to provide a kind of be used for getting of high-power module from high potential energy collecting and the high position that realizes wide-range voltage input can voltage conversion circuit.
Purpose of the present invention adopts following technical proposals to be achieved:
An a kind of high position is got the energy voltage conversion circuit, and its improvements are: described circuit is made of three-phase six brachium pontis, and described upper and lower bridge arm is coupled together by the brachium pontis reactor; Described each brachium pontis is formed by the cascade of high-voltage power module; Described high-voltage power module comprises that high-pressure modular, electric capacity and a high position are got can equipment; Described high-pressure modular, electric capacity and a high position are got can equipment parallel connection successively.
A kind of optimized technical scheme provided by the invention is: described high-pressure modular comprises IGBT controller, all-controlling power electronics device IGBT, diode D, protection equipment and control appliance; Described IGBT controller comprises IGBT1 controller and IGBT2 controller; Described all-controlling power electronics device IGBT comprises IGBT1 and IGBT2; Described diode D comprises D3 and D4.
Second optimized technical scheme provided by the invention is: turn-off thyristor G1 is formed in described IGBT1 and diode D3 inverse parallel; Turn-off thyristor G2 is formed in described IGBT2 and diode D4 inverse parallel; Described control appliance, IGBT1 controller and turn-off thyristor G1 connect successively; Described protection equipment, IGBT2 controller and turn-off thyristor G2 connect successively; Described control appliance and described protection devices in series; Described IGBT1 controller is in parallel with the IGBT2 controller; Described turn-off thyristor G1 and turn-off thyristor G2 series connection.
The 3rd optimized technical scheme provided by the invention is: a described high position is got and can be comprised that buffering absorbs circuit and switching power circuit by equipment; Described buffering absorbs circuit and comprises resistance R 1, capacitor C 2 and diode D2; Described resistance R 1 and capacitor C 2 backs in parallel and diode D2 series connection; Described switching power circuit comprises transformer T1, inductance L
LT, diode D1, capacitor C 1, control chip and metal-oxide-semiconductor Tr; The winding of described transformer T1 and inductance L
LTSeries connection; The secondary winding of described transformer T1, diode D2 and capacitor C 1 are connected in series; Described control chip is connected with the grid of metal-oxide-semiconductor Tr; The drain electrode of described metal-oxide-semiconductor Tr respectively with inductance L
LTThe positive pole that absorbs circuit diode D2 with buffering is connected.
The 4th optimized technical scheme provided by the invention is: a described high position is got and can be called voltage conversion circuit by equipment, the single tube inverse-excitation type structure that described voltage conversion circuit adopts.
Compared with prior art, the beneficial effect that reaches of the present invention is:
1, a high position provided by the invention is got the energy voltage conversion circuit from the power model high potential energy collecting, has avoided the high strength insulating Design, has simplified the structure of application system;
2, a high position provided by the invention is got and can be adopted high-voltage MOS pipe realize the high input voltage Direct Transform by voltage conversion circuit, simple in structure, control convenience;
3, a high position provided by the invention is got and can be adopted single tube reverse exciting topological structural topology by voltage conversion circuit, voltage input wide region, input impedance height;
4, a high position provided by the invention is got and can be continued to get and can work by voltage conversion circuit, realizes continuing high-power stable power-supplying.
Description of drawings
Fig. 1 is the schematic diagram that a high position is got energy circuit translation circuit;
Fig. 2 is the schematic diagram of high-voltage power modular circuit;
Fig. 3 is the schematic diagram that a high position is got energy equipment.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the schematic diagram that a high position is got energy circuit translation circuit; This circuit is made of three-phase six brachium pontis, and the upper and lower bridge arm of every phase is coupled together by the brachium pontis reactor; Each brachium pontis is formed by several high-voltage power module cascades; The high-voltage power module comprises that high-pressure modular, electric capacity and a high position are got can equipment; High-pressure modular, electric capacity and a high position are got can equipment parallel connection successively.
Fig. 2 is the schematic diagram of high-voltage power modular circuit; Wherein, high-pressure modular comprises IGBT controller, all-controlling power electronics device IGBT, diode D, protection equipment and control appliance; The IGBT controller comprises IGBT1 controller and IGBT2 controller; All-controlling power electronics device IGBT comprises IGBT1 and IGBT2; Diode D comprises D3 and D4; Turn-off thyristor G1 is formed in IGBT1 and diode D3 inverse parallel; Turn-off thyristor G2 is formed in IGBT2 and diode D4 inverse parallel; Control appliance, IGBT1 controller and turn-off thyristor G1 connect successively; Protection equipment, IGBT2 controller and turn-off thyristor G2 connect successively; Control appliance and described protection devices in series; The IGBT1 controller is in parallel with the IGBT2 controller; Turn-off thyristor G1 and turn-off thyristor G2 series connection.It can the voltage conversion circuit input voltage be high-voltage power module dc voltage that a high position provided by the invention is got, the high-voltage power module adopts a big electric capacity to provide stable direct-current working volts in DC side in running, for the high-voltage power module provides stable energy acquisition point.
Fig. 3 is the schematic diagram that a high position is got energy equipment; A high position is got and can be comprised that buffering absorbs circuit and switching power circuit by equipment; Buffering absorbs circuit and comprises resistance R 1, capacitor C 2 and diode D2; Resistance R 1 and capacitor C 2 backs in parallel and diode D2 series connection; Switching power circuit comprises transformer T1, inductance L
LT, diode D1, capacitor C 1, control chip and metal-oxide-semiconductor Tr; The winding of transformer T1 and inductance L
LTSeries connection; The secondary winding of transformer T1, diode D2 and capacitor C 1 are connected in series; Control chip is connected with the grid of metal-oxide-semiconductor Tr; The drain electrode of metal-oxide-semiconductor Tr respectively with inductance L
LTThe positive pole that absorbs circuit diode D2 with buffering is connected; A high position is got and can be called voltage conversion circuit by equipment, the single tube inverse-excitation type structure that voltage conversion circuit adopts.As shown in Figure 3, the both positive and negative polarity of wide region high voltage input is connected with the high-order both positive and negative polarity of getting energy equipment place branch road among Fig. 2 respectively.
Voltage conversion circuit adopts to have simple in structure, control and makes things convenient for advantage single tube reverse exciting topological structure, and it is finished and converts high voltage to low-voltage, and the voltage conversion circuit switching device adopts high-voltage MOS pipe to realize high-tension conversion; Voltage conversion circuit adopts buffering to absorb circuit, absorbs backwash and gushes voltage, increases the circuit working reliability; Voltage conversion circuit need be in reliable and stable work in the wide voltage input service scope of 250V~2500V, in the course of the work, the dc bus capacitor of high-voltage power module fluctuates between 250V~2500V, and with ripple voltage, voltage conversion circuit is under the situation of input voltage fluctuation, the voltage 15V of conversion output keeps stable.
Should be noted that at last: only illustrate that in conjunction with the foregoing description technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can make amendment or are equal to replacement the specific embodiment of the present invention, but these modifications or change are all among the claim protection range that application is awaited the reply.