CN104836496A - DC generator set - Google Patents

DC generator set Download PDF

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Publication number
CN104836496A
CN104836496A CN201510270724.2A CN201510270724A CN104836496A CN 104836496 A CN104836496 A CN 104836496A CN 201510270724 A CN201510270724 A CN 201510270724A CN 104836496 A CN104836496 A CN 104836496A
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CN
China
Prior art keywords
phase
isolated
generation unit
bridge rectifier
permanent magnet
Prior art date
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Pending
Application number
CN201510270724.2A
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Chinese (zh)
Inventor
王运良
王韶华
徐青松
徐鹏
刘苏南
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Jiangsu Russia And Us Reaches Electromechanical Technology Co Ltd
Original Assignee
Jiangsu Russia And Us Reaches Electromechanical Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Jiangsu Russia And Us Reaches Electromechanical Technology Co Ltd filed Critical Jiangsu Russia And Us Reaches Electromechanical Technology Co Ltd
Priority to CN201510270724.2A priority Critical patent/CN104836496A/en
Publication of CN104836496A publication Critical patent/CN104836496A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output

Abstract

The invention provides a DC generator set based on multipath series-parallel non-isolation switch power supply circuit technology; the DC generator set comprises a permanent magnetism generator and a rectifier controller; the permanent magnetism generator comprises three or more phase windings, and a pole number is bigger than two; the rectifier controller comprises a full bridge rectifier circuit, and a non-isolation voltage reduction switch power supply circuit; the full bridge rectifier circuit is used for converting AC current into DC current, and outputting the DC current, wherein the AC current is generated by the permanent magnetism generator; the non-isolation voltage reduction switch power supply circuit is used for carrying out voltage reduction process for the DC current outputted by the full bridge rectifier circuit, thus realizing stable DC output, improving whole generator power generation efficiency, reducing oil consumption, improving output voltage stability, realizing full power output of different output voltage generator sets, reducing system complexity, reducing cost, and improving system reliability.

Description

A kind of DC generation unit
Technical field
The present invention relates to DC generation unit and output voltage stabilizing circuit thereof, the DC generation unit particularly driven by diesel oil or gasoline engine.
Background technology
At some using storage battery as in the electric power system of main energy-storage units, usually have diesel oil or gas-liquid-liquid three-phase flow.When storing electricity deficiency in storage battery, and when other energy can not charge to it in time, startup diesel oil or gas-liquid-liquid three-phase flow are to charge in batteries.Be exactly more typically communication base station, especially without the communication base station of mains-supplied, diesel generating set can directly as main charging equipment.
In the past, communication base station many employings conventional alternator group, the alternating current exported by communication power supply was converted to direct current supply communication apparatus or charged a battery.In this supply power mode, the motor of the electric excitation of the many employings of conventional alternator group, so whole system efficiency is on the low side, particularly in the occasion that some duty ratios are lighter, due to the frequency that generating set will keep relative stability, the oil consumption of unit is higher.
In recent years, along with the progress of technology, some communication base stations bring into use DC generation unit.The output of DC generation unit in the market has two kinds of structures substantially:
The first adopts heterogeneous electric excitation generator, exports low-voltage AC, then through high-power rectifying device, direct supply load.This unit is due to direct output of DC current, and not needing power supply module for communication step-down to change, whole efficiency has had certain lifting, but does not have special stable-pressure device due to output voltage, voltage fluctuation is bigger than normal, multiplex in more less demanding charge in batteries occasions.
The second adopts multi-polar permanent-magnet generator, exports the alternating current of about 200V, then is about 48V direct current feed system by the step-down switching power module of band high frequency transformer by voltage transitions.This generating set is that the one of permanent magnet generator and communication switch power directly combines in fact, such generating set is compared with the generating set of the direct commutation technique of the heterogeneous low-voltage AC of the employing introduced above, except there is its generating efficiency that can improve whole system and reducing except the advantage of oil consumption, owing to have employed communication switch power module, its output voltage stability problem obtains good solution, can be directly used in charging and the power supply of communication base station.
The DC generation unit of comprehensive Liang Zhong mechanism above, the first output voltage stability is on the low side, but structure is simple; The second output voltage precision is guaranteed, but the switch power technology of band high frequency transformer isolation is adopted because communication power supply, its circuit topological structure relative complex, particularly larger to vibration diesel generating set, all there is certain challenge in its cost and reliability.In addition, the adaptability of these two kinds of generating sets to load is inadequate, such as some base station needs the changeable power supply of 24V and 48V, the DC generation unit of these two kinds of structures can only when ensureing a kind of output voltage, reduce maximum power and the second output voltage is provided, the generating set of such as 48V/5kW, when exporting 24V, can only provide about 2.5kW power output.
Summary of the invention
The object of the invention is to the defect overcoming prior art, for problems such as existing DC generation unit output voltage stability, system complexity and the outputs of different loads voltage unit total power, DC generation unit based on the non-isolated Switching Power Supply of multichannel connection in series-parallel (BUCK) circuit engineering is provided, not only can improve complete machine generating efficiency, reduce the stability of oil consumption and raising output voltage, different output voltage unit total power can be realized export simultaneously, the complexity of reduction system, improves the reliability of system while reducing costs.
DC generation unit provided by the invention, is characterized in that: comprise permanent magnet generator and commutation controller; Described permanent magnet generator has three-phase or the above winding of three-phase, and its number of poles is more than the two poles of the earth; Described commutation controller comprises full bridge rectifier, non-isolated step-down switching power circuit; Described full bridge rectifier is used for converting the alternating current that described permanent magnet generator sends to direct current and exporting; Described non-isolated step-down switching power circuit is used for carrying out step-down process to the direct current that described full bridge rectifier exports, and realizes stable direct current and exports.The present invention adopts multipole multi-phase permanent synchronous generator and the commutation controller based on non-isolated step-down switching power supply (BUCK) circuit, improves the efficiency of complete machine, reduces the complexity of voltage stabilizing circuit, reduce costs raising system reliability.
The present invention also provides a kind of DC generation unit, comprises permanent magnet generator and commutation controller; Described permanent magnet generator has three-phase or the above winding of three-phase, and its number of poles is more than the two poles of the earth, and this permanent magnet generator has two covers or the above completely isolated winding of two covers; Described commutation controller has the isolable full-bridge rectification voltage stabilizing circuit of more than two-way or two-way, the winding one_to_one corresponding of described full-bridge rectification voltage stabilizing circuit and described permanent magnet generator unit; Described full-bridge rectification voltage stabilizing circuit comprises full bridge rectifier and non-isolated step-down switching power circuit; Described full bridge rectifier is used for converting the alternating current that described permanent magnet generator sends to direct current and exporting; Described non-isolated step-down switching power circuit is used for carrying out step-down process to the direct current that described full bridge rectifier exports, and realizes stable direct current and exports.
Preferably, described commutation controller comprises the non-isolated step-down switching power circuit of more than two-phase or two-phase, non-isolated step-down switching power circuit crisscross parallel more than this two-phase or two-phase.By regulating the PWM pulsewidth of the device for power switching of non-isolated step-down switching power circuit, realizing stable direct current and exporting.
Preferably, described full-bridge rectification voltage stabilizing circuit comprises the non-isolated step-down switching power circuit of more than two-phase or two-phase, non-isolated step-down switching power circuit crisscross parallel more than this two-phase or two-phase.
Preferably, the alternating current that often cover winding sends converts direct current to and after step-down process, serial or parallel connection exports.The stable direct current of more than two-way or two-way isolating exports series connection and can realize output voltage and be added; If output voltage is equal, two-way output-parallel can realize output current and be added, i.e. corresponding different voltage requirements, can realize load full power and export.
Preferably, described full bridge rectifier comprises multiple power diode and/or silicon controlled crystal brake pipe.Described full bridge rectifier can adopt synchronous rectification, and namely described multiple power diode and/or silicon controlled crystal brake pipe partly or entirely replace with Metal-Oxide Semiconductor field-effect transistor, realizes the object reduced the wastage.
Preferably, described non-isolated step-down switching power circuit comprises fly-wheel diode, electric capacity, device for power switching and inductance.For reducing the wastage, described device for power switching uses Metal-Oxide Semiconductor field-effect transistor.Described non-isolated step-down switching power circuit adopts synchronous rectification, and namely described fly-wheel diode replaces Metal-Oxide Semiconductor field-effect transistor, realizes the object reduced the wastage.
Preferably, described commutation controller also comprises control unit, and this control unit, by detecting voltage or the current feedback signal of external loading, the PWM pulsewidth of regulating power switching device, realizes stable direct current and exports.
The invention has the beneficial effects as follows: adopt multipole multi-phase permanent synchronous generator and the commutation controller based on non-isolated step-down switching power supply (BUCK) circuit, improve the efficiency of complete machine, reduce the complexity of voltage stabilizing circuit, reduce costs raising system reliability, the full power simultaneously by realizing unit in different output voltage situation to the commutation controller device serial or parallel connection of isolation exports.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1;
Fig. 2 is the embodiment of the present invention 2;
Fig. 3 is the embodiment of the present invention 3;
Fig. 4 is the embodiment of the present invention 4;
Fig. 5 (a), Fig. 5 (b) are two kinds of full bridge rectifier principle schematic adopting synchronous rectification;
Fig. 6 is the non-isolated step-down switching power circuit principle schematic diagram adopting synchronous rectification.
In figure: 1, permanent magnet generator; 2, commutation controller; 11a, 11b, permanent magnet generator unit two overlaps independent three-phase windings; 20-25,20a-25a, 20b-25b, power diode; 26,26a, 26b, 26c, 26d, fly-wheel diode; 27,27a, 27b, 27c, 27d, device for power switching; 28,28a, 28b, 28c, 28d, inductance; 29,29a, 29b, electric capacity; 21 '-27 ', Metal-Oxide Semiconductor field-effect transistor.
Embodiment
Be described further below in conjunction with embodiment:
Embodiment 1
As shown in Figure 1, DC generation unit comprises permanent magnet generator 1 and commutation controller 2, permanent magnet generator 1 has two cover three-phase windings, commutation controller 2 has the isolable full-bridge rectification voltage stabilizing circuit of two-way, and full-bridge rectification voltage stabilizing circuit comprises full bridge rectifier and the non-isolated step-down switching power circuit of two-phase; First set three-phase windings 11a sends three-phase alternating current and converts direct current output to through the full bridge rectifier that power diode 20a-25a forms.This direct current exports the mutually non-isolated step-down switching power circuit (BUCK reduction voltage circuit) of a road through being made up of fly-wheel diode 26a, device for power switching 27a, inductance 28a, electric capacity 29a; Another road is through forming another mutually non-isolated step-down switching power circuit (BUCK reduction voltage circuit) by fly-wheel diode 26b, device for power switching 27b, inductance 28b, electric capacity 29a.Two-phase reduction voltage circuit crisscross parallel, the phase shift crisscross parallel of two-phase reduction voltage circuit is controlled by control unit (not shown), this control unit also detects output voltage or current feedback signal, the PWM pulsewidth of regulating power switching device 27a, 27b, realizes the stable direct current in a road and exports.
In like manner, the second cover three-phase windings 11b of permanent magnet generator 1 sends three-phase alternating current and converts direct current to through the full bridge rectifier of power diode composition 20b-25b and export.This direct current exports a road and passes through by fly-wheel diode 26c, device for power switching 27c, inductance 28c, the mutually non-isolated step-down switching power circuit (BUCK reduction voltage circuit) that electric capacity 29b forms, another road is passed through by 26d fly-wheel diode, device for power switching 27d, inductance 28d, electric capacity 29b forms another mutually non-isolated step-down switching power circuit (BUCK reduction voltage circuit), two-phase reduction voltage circuit crisscross parallel, the phase shift crisscross parallel of two-phase reduction voltage circuit is controlled by control unit (not shown), this control unit also detects output voltage or current feedback signal, regulating power switching device 27c, the PWM pulsewidth of 27d, realize the stable direct current in another road to export.
The stable DC output circuit series connection of above-mentioned two-way isolation can realize output voltage and be added; If output voltage is equal, two-way output-parallel can realize output current and be added, i.e. corresponding different voltage requirements, can realize load full power and export.
Embodiment 2
As shown in Figure 2, DC generation unit comprises permanent magnet generator 1 and commutation controller 2, permanent magnet generator 1 has two cover three-phase windings, commutation controller 2 has the isolable full-bridge rectification voltage stabilizing circuit of two-way, and full-bridge rectification voltage stabilizing circuit comprises full bridge rectifier and non-isolated step-down switching power circuit; The first set three-phase windings 11a of permanent magnet generator 1 sends three-phase alternating current and converts direct current output to through the full bridge rectifier that power diode 20a-25a forms.This direct current exports the non-isolated step-down switching power circuit in the road (BUCK reduction voltage circuit) through being made up of fly-wheel diode 26a, device for power switching 27a, inductance 28a, electric capacity 29a, this reduction voltage circuit is by detecting output voltage or current feedback signal, the PWM pulsewidth of regulating power switching device 27a, realizes the stable direct current in a road and exports.
In like manner, the second cover three-phase windings 11b of permanent magnet generator 1 sends three-phase alternating current and converts direct current output to through the full bridge rectifier that power diode 20b-25b forms.This direct current exports the non-isolated step-down switching power circuit in another road (BUCK reduction voltage circuit) through being made up of fly-wheel diode 26c, device for power switching 27c, inductance 28c, electric capacity 29b, a road, this reduction voltage circuit is equally by detecting output voltage or current feedback signal, the PWM pulsewidth of regulating power switching device 27c, realizes the stable direct current in another road and exports.
The stable DC output circuit series connection of above-mentioned two-way isolation can realize output voltage and be added; If output voltage is equal, two-way output-parallel can realize output current and be added, i.e. corresponding different voltage requirements, can realize load full power and export.
Embodiment 3
As shown in Figure 3, DC generation unit comprises permanent magnet generator 1 and commutation controller 2, and permanent magnet generator 1 has a set of three-phase windings, and commutation controller 2 has full bridge rectifier and the non-isolated step-down switching power circuit of two-phase, permanent magnet generator 1 has a three-phase windings, and the three-phase alternating current sent is rectified into direct current through power diode 20-25, fly-wheel diode 26a, device for power switching 27a, inductance 28a, electric capacity 29a forms a mutually non-isolated step-down switching power circuit (BUCK reduction voltage circuit), in like manner fly-wheel diode 26b, device for power switching 27b, inductance 28b, electric capacity 29a forms another mutually non-isolated step-down switching power circuit (BUCK reduction voltage circuit), above-mentioned two-phase BUCK reduction voltage circuit crisscross parallel, phase shift Parallel Control is realized by control unit (not shown), control unit is by detecting load voltage or current feedback signal, regulating power switching device 27a, the PWM pulsewidth of 27b, realize stable direct current to export.
Embodiment 4
As shown in Figure 4, DC generation unit comprises permanent magnet generator 1 and commutation controller 2, and permanent magnet generator 1 has a set of three-phase windings, and commutation controller 2 has full bridge rectifier and non-isolated step-down switching power circuit; Permanent magnet generator 1 has a three-phase windings, the full bridge rectifier that the three-phase alternating current sent forms through power diode 20-25 is rectified into direct current, the direct current supply load that non-isolated step-down switching power circuit (BUCK reduction voltage circuit) reduced output voltage that this direct current process is made up of fly-wheel diode 26, device for power switching 27, inductance 28, electric capacity 29 is more stable.
Full bridge rectifier and BUCK reduction voltage circuit form commutation controller, commutation controller also comprises control unit, work as load variations, or permanent magnet generator rotation speed change is when causing rectifier bridge output voltage to change, this control unit, according to the PWM pulsewidth of load voltage or current feedback automatic power adjustment switching device 27, realizes output voltage or current stabilization.
Embodiment 5
As shown in Fig. 5 (a), full bridge rectifier adopts synchronous rectification, wherein descend brachium pontis to adopt Metal-Oxide Semiconductor field effect transistor M OSFET (23 '-25 ') to replace power diode, the object that realization reduces the wastage.
Embodiment 6
As shown in Fig. 5 (b), full bridge rectifier adopts synchronous rectification, and employing Metal-Oxide Semiconductor field effect transistor M OSFET (20 '-25 ') replace power diode, realize the object reduced the wastage.
Embodiment 7
As shown in Figure 6, non-isolated step-down switching power circuit (BUCK reduction voltage circuit) adopts synchronous rectification, adopt Metal-Oxide Semiconductor field effect transistor M OSFET (26 ') to replace fly-wheel diode afterflow, realize the object reduced the wastage; Device for power switching also adopts Metal-Oxide Semiconductor field effect transistor M OSFET (27 ').
Power diode in full bridge rectifier also can use silicon controlled crystal brake pipe to replace, and certainly, for reducing the wastage, silicon controlled crystal brake pipe also can partly or entirely use Metal-Oxide Semiconductor field effect transistor M OSFET to substitute.

Claims (10)

1. a DC generation unit, is characterized in that: comprise permanent magnet generator and commutation controller; Described permanent magnet generator has three-phase or the above winding of three-phase, and its number of poles is more than the two poles of the earth; Described commutation controller comprises full bridge rectifier, non-isolated step-down switching power circuit; Described full bridge rectifier is used for converting the alternating current that described permanent magnet generator sends to direct current and exporting; Described non-isolated step-down switching power circuit is used for carrying out step-down process to the direct current that described full bridge rectifier exports, and realizes stable direct current and exports.
2. a DC generation unit, is characterized in that: comprise permanent magnet generator and commutation controller; Described permanent magnet generator has three-phase or the above winding of three-phase, and its number of poles is more than the two poles of the earth, and this permanent magnet generator has two covers or the above completely isolated winding of two covers; Described commutation controller has the isolable full-bridge rectification voltage stabilizing circuit of more than two-way or two-way, the winding one_to_one corresponding of described full-bridge rectification voltage stabilizing circuit and described permanent magnet generator unit; Described full-bridge rectification voltage stabilizing circuit comprises full bridge rectifier and non-isolated step-down switching power circuit; Described full bridge rectifier is used for converting the alternating current that described permanent magnet generator sends to direct current and exporting; Described non-isolated step-down switching power circuit is used for carrying out step-down process to the direct current that described full bridge rectifier exports, and realizes stable direct current and exports.
3. DC generation unit as claimed in claim 1, is characterized in that: described commutation controller comprises the non-isolated step-down switching power circuit of more than two-phase or two-phase, non-isolated step-down switching power circuit crisscross parallel more than this two-phase or two-phase.
4. DC generation unit as claimed in claim 2, it is characterized in that: described full-bridge rectification voltage stabilizing circuit comprises the non-isolated step-down switching power circuit of more than two-phase or two-phase, non-isolated step-down switching power circuit crisscross parallel more than this two-phase or two-phase.
5. the DC generation unit as described in claim 2 or 4, is characterized in that: the alternating current that often cover winding sends converts direct current to and after step-down process, serial or parallel connection exports.
6. DC generation unit as claimed in claim 1 or 2, is characterized in that: described full bridge rectifier comprises multiple power diode and/or silicon controlled crystal brake pipe.
7. DC generation unit as claimed in claim 6, it is characterized in that: described full bridge rectifier adopts synchronous rectification, and namely described multiple power diode and/or silicon controlled crystal brake pipe partly or entirely replace with Metal-Oxide Semiconductor field-effect transistor.
8. DC generation unit as claimed in claim 1 or 2, is characterized in that: described non-isolated step-down switching power circuit comprises fly-wheel diode, electric capacity, device for power switching and inductance.
9. DC generation unit as claimed in claim 8, is characterized in that: described non-isolated step-down switching power circuit adopts synchronous rectification, and namely described fly-wheel diode replaces with Metal-Oxide Semiconductor field-effect transistor.
10. DC generation unit as claimed in claim 8, it is characterized in that: described commutation controller also comprises control unit, this control unit, by detecting voltage or the current feedback signal of external loading, the PWM pulsewidth of regulating power switching device, realizes stable direct current and exports.
CN201510270724.2A 2015-05-25 2015-05-25 DC generator set Pending CN104836496A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106972758A (en) * 2017-05-15 2017-07-21 南京航空航天大学 A kind of single-phase/three-phase combination inversion electric supply installation of Independent Power Generation occasion
CN107317488A (en) * 2017-08-14 2017-11-03 中车唐山机车车辆有限公司 Type multiphase permanent magnet generator commutation system
CN111711369A (en) * 2020-06-24 2020-09-25 烟台大学 Six-switch five-level rectifier and control method thereof

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN106972758A (en) * 2017-05-15 2017-07-21 南京航空航天大学 A kind of single-phase/three-phase combination inversion electric supply installation of Independent Power Generation occasion
CN107317488A (en) * 2017-08-14 2017-11-03 中车唐山机车车辆有限公司 Type multiphase permanent magnet generator commutation system
CN111711369A (en) * 2020-06-24 2020-09-25 烟台大学 Six-switch five-level rectifier and control method thereof

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