CN102427291B - Brushless generator in automatic voltage regulation state - Google Patents
Brushless generator in automatic voltage regulation state Download PDFInfo
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- CN102427291B CN102427291B CN201110380576.1A CN201110380576A CN102427291B CN 102427291 B CN102427291 B CN 102427291B CN 201110380576 A CN201110380576 A CN 201110380576A CN 102427291 B CN102427291 B CN 102427291B
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Abstract
The invention relates to a brushless generator in automatic voltage regulation state. The brushless generator comprises a generator principal winding (WA) embedded in a stator (3) and is characterized by also comprising a harmonic winding (WS) embedded in the stator (3), wherein harmonic energy is taken out from the harmonic winding (WS), is rectified by an external circuit, and is sent to an exciter exciting winding (WE1); and when the states of the generator are changed, the harmonic energy is used for regulating excitation so as to stabilize the voltage of the generator. The electrode distance (tau1) of a coil (V2) of the principal winding (WA) corresponds to three electrode distances of coils (V1) of the harmonic winding (WS). A connection method for the three coils (V1) of the harmonic winding comprises the following steps of: forming a serial circuit by connecting the tail end of the coil (1) with the tail end of the coil (2), and connecting the head end of the coil (2) with the head end of the coil (3). The brushless generator can automatically regulate the voltage for stably generating power in various states, a conventional automatic voltage regulator (AVR) module is omitted, circuits of measurement devices, amplification devices, comparison devices and power controllers are saved, and the brushless generator has a simple structure, shorter required time for stabilizing voltage, high reliability and low cost.
Description
Technical field
The present invention is the brushless generator that a kind of state automatic voltage regulates, and belongs to technical field of generators.
Background technology
Existing electric excitation generator (comprise interchange, direct current, brushless, brush hair motor) in order to realize voltage stabilizing, all adopt droop control, be configured with automatic voltage regulate AVR module (hereinafter referred to as AVR module).Measure the voltage of generator by AVR module, and by signal through process, compare, amplify, phase shift, carry out regulator generator excitation with the output of PWM technical controlling power model, realize voltage stabilizing.Its circuit is complicated, voltage stabilization required time is longer, and exciting current all flows through power model, and make power device capacity large, reliability reduces, and cost raises.
A kind of permanent magnet generator utilizes the permanent magnetic generating of permanent magnet, although also without AVR module, and load, change of properties, rotation speed change, makes generator output voltage change greatly, and uncontrollable, and load characteristic is too soft; Add that permanent magnet generator temperature characterisitic is poor, therefore voltage stabilization characteristic is poor, limits its scope of application.
Adopt the generator of above-mentioned method for stabilizing voltage, all do not reach the requirement that GB2820-1990A and GJB5785-2006 standard specifies.
Summary of the invention
The object of the invention is to provide the brushless generator that a kind of state automatic voltage regulates, the present invention can make generator under various running status (load, character, rotation speed change), the voltage of automatic this generator of modification stability of equal energy, to reach the working voltage of setting, its simple structure, voltage stabilization required time is shorter, and reliability is high, and cost is low.Brushless generator of the present invention does not need AVR module.The present invention seeks to realize by following technical scheme.The present invention is the brushless generator that a kind of state automatic voltage regulates, comprise and be embedded in generator main winding WA in stator 3 and exciter excitation winding WE1, it is characterized in that: also there is the harmonic winding WS be embedded in stator, harmonic energy is taken out from harmonic winding, after external circuit rectification, deliver to exciter excitation winding and be used for regulating excitation.
Described external circuit comprises shunt resistance RX and one-way commutation bridge U2; Be connected with 2 terminal E1, E2 of exciter excitation winding from 2 exit B1, B2 of described harmonic winding through shunt resistance, one-way commutation bridge.
The pole span τ 1 of the coil V2 of described main winding is corresponding to 3 pole spans of the coil of described harmonic winding, and the method for attachment of 3 harmonic winding coil V1 is: the series circuit that coil tail end is 1. connected with coil tail end 2., coil head end is 2. connected with coil head end 3..
The frequency of the pole span τ 1 of described coil V2 is 50Hz, and the frequency of each pole span of described triple-frequency harmonics is 150Hz.
The present invention utilizes the harmonic energy in generator unit stator, is used for the excitation of regulator generator after rectification.Way takes out harmonic energy from the harmonic winding be embedded in stator, is used for the excitation of regulator generator after external circuit rectification.When the voltage status of generator and load, character, rotating speed change, the excitation of the automatic regulator generator of this harmonic energy energy, keep the output voltage stabilization of generator, realizing generator under various regimes all can regulation voltage automatically, eliminate conventional automatic voltage adjustment module AVR, also save measurement, amplify, compare and the circuit such as power control device.
For 6GF type brushless generator, this generator speed is 3000 revs/min, and rotor is salient pole (N and S a pair pole), and therefore, the magnetic in power generator air gap is close is distributed as flat-topped wave.Because South Pole S and arctic N is symmetrical, fundamental frequency is 150Hz, then three humorous wave frequencies and be 50Hz × 3=150Hz.
When generator loading increases, voltage trend declines, and generator is unexcited; When generator power factor COS φ declines, inductance current component increases, and generator degaussing causes presenting unexcited, but at this moment main generator armature reaction magnetic condensation wave is peaked wave, concerning triple-frequency harmonics, add magnetic, harmonic energy strengthens automatically, compensate for the unexcited that generator degaussing causes.Utilize this characteristic of triple-frequency harmonics, achieve generator when running status (load, load characteristic, rotating speed etc.) changes, automatically control excitation and compensate, realize voltage stabilizing, and the fabulous ability of encouraging by force of tool and dynamic characteristic.
For making stabilized voltage characteristic be adjusted to the best, eliminating each generator because of manufacturing process deviation and causing the discrepant deficiency of triple-frequency harmonics energy, at triple-frequency harmonics winding terminal shunt resistance in parallel, this resistance also can be used as output voltage values of adjusting and uses.
The present invention applies on the 6GF type diesel generating set of power 6kW, through+50 degree high temperature,-40 degree low-temperature tests, 50 continuous throughout the twenty-four hour24s (containing overload, short circuit, directly starting with the test of capacity electric machine), proved by test: generating is reliable, working stability, performance is comprehensive, and the cold and hot skew of voltage is less than 0.8%; Voltage fluctuation is less than 0.46%; Steady state voltage regulation is better than 1.8%, and voltage stabilization required time is less than 0.19 second.Transient voltage regulation factor is better than 17%.Meet the requirement of GB2820-1990 and GJB5785-2006 standard, there is fabulous application prospect.
In sum, the present invention generates electricity the voltage of function automatically modification stability generating under various regimes, saves automatic voltage regulator AVR module, also save measurement, amplify, compare and the circuit such as power control device, its simple structure, voltage stabilization required time are shorter, and reliability is high, and cost is low.
Accompanying drawing explanation
Fig. 1 the present invention is applied to the schematic diagram of the 6GF brushless generator circuit system that state automatic voltage regulates.
The connection layout of Fig. 2 generator triple-frequency harmonics winding.
The structural representation of 6GF brushless generator in Fig. 3 Fig. 1.
Code name and the title table of comparisons in figure
Embodiment
The present invention illustrates for 6GF brushless generator (6kW).If Fig. 1 is the 6GF brushless generator circuit system schematic diagram that state automatic voltage regulates.In figure, be 6GF generator circuit in chain-dotted line, generator circuit comprises generator main winding WA of the prior art and exciter excitation winding WE1, also comprises harmonic winding WS and one-way commutation bridge U2, the shunt resistance RX of the present invention's employing; Harmonic winding WS is all inlaid on generator unit stator 3 (Fig. 3) together with main winding WA, and 2 terminal B1, B2 of harmonic winding WS are connected with terminal E1, E2 of exciter excitation winding WE1 through shunt resistance RX, one-way commutation bridge U2.Exciter excitation winding WE1 is contained on the stator of exciter.(in Fig. 3, part 10 is the excitation winding WE1 on exciter stator), the power of shunt resistance RX is 10W, and resistance is adjustable.Can find out: from the harmonic winding WS be embedded in stator 3 (Fig. 3), take out harmonic energy, after external circuit rectification, regulate excitation with exciter excitation winding WE1.
Fig. 2 is the connection layout of generator unit stator triple-frequency harmonics winding, and this figure belongs to the expansion schematic diagram of generator main winding WA.S1 in figure is first-harmonic (50Hz) South Pole, and N1 is the first-harmonic arctic.N3 and S3 is respectively the north and south poles of triple-frequency harmonics.The harmonic wave electromotive force that the harmonic wave electromotive force and the arctic N3 that produce in order to ensure harmonic wave South Pole S3 produce instantaneously all to be added each; Therefore, the order of connection of each coil V1 of harmonic winding WS is: tail 1. connect tail 2., head 2. connector 3. connect.The pole span τ 1 of the coil V2 of described main winding WA is first-harmonic pole span, and corresponding to 3 harmonic wave pole span τ 1/3 of harmonic winding WS coil V1, the present embodiment adopts the frequency of the pole span τ 1 of coil V2 to be 150Hz, and the frequency of the pole span of triple-frequency harmonics is respectively 50Hz.Therefore, first-harmonic electromotive force can not be induced in harmonic winding, only have 150Hz triple-frequency harmonics electromotive force.
Fig. 3 is the 6GF brushless electricity generator structure figure realizing the adjustment of state automatic voltage, from figure, it is a brushless generator as seen, be made up of exciter (right side) and main generator (left side), rotating rectifier dish 11 is contained in generator front portion (left side).Rotor 4 has 24 grooves, South Pole S, arctic N a pair pole for salient pole type; Stator 3 has 36 grooves, main embedding main winding 8 in groove, but has 6 coils to be 150Hz harmonic winding 7, and each coil is 6 circles, with the single enamelled wire coiling of φ 0.67QZY-2/180.The output of harmonic winding 7 through one-way commutation bridge U2 directly for the excitation winding WE1 excitation of exciter.Generator unit stator 3, rotor 4 all adopt DW310-35 cold-reduced silicon sheet.In order to realize generating of automatically encouraging oneself, exciter is embedded with Nd-Fe-B magnet steel.
The present embodiment rated excitation power is 56 watts, and shunt through shunt resistance RX, specified shunting power is 5 watts, in order to reliable operation, selects RX resistor rated power to be 10 watts.
Shunt resistance RX can make often to overlap electricity generation system stabilized voltage characteristic and be adjusted to the best, also can eliminate the triple-frequency harmonics capacity volume variance that generator causes because of manufacturing process, and this resistance also can be used as generator output voltage size of adjusting and uses.
During work, when Generator Status changes, as: high load suddenly, power factor declines (delayed), and when rotating speed declines, generator armature synthesis magnetic flux density waveforms is cusp configuration (Fig. 2); Therefore, triple-frequency harmonics energy increases automatically in proportion, takes out through single-phase rectification bridge U2, terminal E1, E2, directly to exciter excitation winding WE1 excitation, generator voltage is increased, realizes voltage stabilizing from 150Hz harmonic winding WS.Equally, when rotating speed rises, triple-frequency harmonics energy reduces automatically in proportion, and generator voltage is declined with voltage stabilizing.
Claims (1)
1. the brushless generator of a state automatic voltage adjustment, comprise and be embedded in generator main winding (WA) in stator (3) and exciter excitation winding (WE1), it is characterized in that: also there is the harmonic winding (WS) be embedded in stator (3), harmonic energy is taken out from harmonic winding (WS), after external circuit rectification, deliver to exciter excitation winding (WE1) place;
Described external circuit comprises shunt resistance (RX) and one-way commutation bridge (U2); Be connected with 2 terminals (E1, E2) of exciter excitation winding (WE1) from 2 exits (B1, B2) of described harmonic winding (WS) through shunt resistance (RX), one-way commutation bridge (U2);
The pole span (τ 1) of the coil (V2) of described generator main winding (WA) is corresponding to 3 pole spans of the coil (V1) of described harmonic winding (WS), and the method for attachment of 3 harmonic winding coils (V1) is: the series circuit that coil tail end is 1. connected with coil tail end 2., coil head end is 2. connected with coil head end 3.; The frequency of the pole span (τ 1) of generator main winding coil (V2) is 150Hz, and the frequency of each pole span of harmonic winding coil is 50Hz;
Generator unit stator (3), rotor (4) all adopt cold-reduced silicon sheet, and exciter is embedded with Nd-Fe-B magnet steel.
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| CN201110380576.1A CN102427291B (en) | 2011-11-25 | 2011-11-25 | Brushless generator in automatic voltage regulation state |
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| CN201110380576.1A CN102427291B (en) | 2011-11-25 | 2011-11-25 | Brushless generator in automatic voltage regulation state |
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| CN102427291B true CN102427291B (en) | 2015-04-22 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102810920A (en) * | 2012-07-17 | 2012-12-05 | 福建一华电机有限公司 | Brushless generator without automatic voltage regulator |
| CN103580420A (en) * | 2013-10-17 | 2014-02-12 | 南昌康富电机技术有限公司 | High-power track welding efficient excitation single-phase generator |
| CN105207555B (en) * | 2015-09-18 | 2018-03-09 | 重庆铭贝科技有限公司 | A kind of Digital-typed Generator automatic regulating system and its method |
| CN113193805A (en) * | 2021-04-16 | 2021-07-30 | 康富科技有限公司 | Vehicle-mounted self-adaptive power generation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101083417A (en) * | 2007-07-20 | 2007-12-05 | 泰豪科技股份有限公司 | Brushless DC electric generator with duplex windings as mutual backups |
| CN101562382A (en) * | 2009-05-27 | 2009-10-21 | 泰豪科技股份有限公司 | Quintuple harmonic excitation brushless synchronous generator |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101083417A (en) * | 2007-07-20 | 2007-12-05 | 泰豪科技股份有限公司 | Brushless DC electric generator with duplex windings as mutual backups |
| CN101562382A (en) * | 2009-05-27 | 2009-10-21 | 泰豪科技股份有限公司 | Quintuple harmonic excitation brushless synchronous generator |
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Owner name: ZHEJIANG SINGFU AEROSPACE TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHEJIANG SINGFU MACHINERY ELECTRONIC TECHNOLOGY CO., LTD. |
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Address after: 313000 Zhejiang City, Huzhou province dare mountain road, No. 1688 Patentee after: Zhejiang Singfu Aerospace Technology Co., Ltd. Address before: Jinya Zhuang No. 26 building, Hangzhou city of Zhejiang province Jiefang Road 310008 6 floor Patentee before: Zhejiang Singfu Machinery Electronic Technology Co., Ltd. |