CN102368676B - Variable-speed constant-voltage direct-current brushless generator - Google Patents
Variable-speed constant-voltage direct-current brushless generator Download PDFInfo
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- CN102368676B CN102368676B CN201110380905.2A CN201110380905A CN102368676B CN 102368676 B CN102368676 B CN 102368676B CN 201110380905 A CN201110380905 A CN 201110380905A CN 102368676 B CN102368676 B CN 102368676B
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Abstract
The invention discloses a variable-speed constant-voltage direct-current brushless generator. After a rotating speed of the generator is greater than 500r/min, a voltage regulator begins to work so as to establish a voltage. A voltage signal of a generator armature winding is become into a pulsing direct current voltage signal via a bridge-type rectifier filtering module. After differential plastic is performed to the voltage signal, the voltage signal and a voltage setting reference signal are sent to a PID regulator module. Pulse width modulation is performed to a PID regulator module output signal and the PID regulator module output signal turns into a rectangular wave signal through PWM and a power driving module. A size of a generator field current is controlled through a driving circuit so that a generator output voltage can be adjusted and the generator output voltage can be stabilized at a rated voltage value. In the invention, through adjusting an on-off ratio of the voltage on a generator exciting winding, the size of the current on the generator exciting winding can be adjusted so that the voltage of the generator can be stabilized at the rated voltage value. During an automobile driving process, when a speed changes suddenly, the output voltage of the generator can maintain 28V.
Description
Technical field
The present invention relates to alternator for vehicle field, especially relate to a kind of variable-speed constant-voltage direct-current brushless generator.
Background technology
Speed change brushless DC generator is for the power takeoff generation unit of vehicle traveling process, and the power consumption equipment that carries dress for vehicle provides stable dc power supply, also can be used as DC generator for other DC power generation system.Generator adopts Lundell structure, and generator is mainly comprised of stator and rotor, front and rear cover, silicon rectifier device, voltage regulator and electric weight demonstration and output-controlling device etc.Rotor adopts claw-pole structure, and front and rear cover is steel plateelement.By controlling the magnetic field of generator, control the armature voltage of generator, and then control the output voltage after rectification.DC generator field power supply is originally all the electricity that adopts permanent magnetic motor to send, when generator speed changes suddenly, permanent magnetic motor output voltage also changes thereupon, when generator speed raises suddenly, if it is constant to keep DC generator output voltage to remain on DC28V, will reduce generator excitation voltage, and now generator voltage along with rotating speed raises and raises, so reduction exciting current that will be by a larger margin, this has just brought larger difficulty to control.
Summary of the invention
The object of the invention be to provide a kind of can guarantee running car time generator output voltage keep the constant variable-speed constant-voltage direct-current brushless generator of 28V.
For achieving the above object, the present invention can take following technical proposals:
Variable-speed constant-voltage direct-current brushless generator of the present invention, comprises generator, and the power output end of described generator is electrically connected to the power input of electric current and voltage rotating speed display controller module, rectification filtering module and voltage detection module respectively; The signal output part of described electric current and voltage rotating speed display controller module is electrically connected to the signal input part of direct current output module, and electric current and voltage rotating speed display controller module is connected with the communication of RS-485 communication module; The power output end of described rectification filtering module is electrically connected to the power input of electric current and voltage rotating speed display controller module, current detection module and preload module respectively; The signal output part of described current detection module is electrically connected to the signal input part of electric current and voltage rotating speed display controller module, direct current output module, working power handover module, low speed overcurrent voltage protection module and current compensation module respectively; The signal output part of described voltage detection module is electrically connected to the signal input part of PID adjustment module by described low speed overcurrent voltage protection module and far-end control module respectively; The signal output part of described current compensation module is electrically connected to the signal input part of described PID adjustment module; The signal output part of PID adjustment module is electrically connected to the signal input part of PWM and power driver module, and the signal input part of described engine is electrically connected to the signal output part of voltage excitation module by described PWM and power driver module and working power handover module.
The invention has the advantages that by the size of current of the voltage make-to-break ratio regulator generator excitation winding in regulator generator excitation winding, thereby control the voltage stabilization of generator at rated value, when guaranteeing generator alternator speed (2000-6000r/min) changing suddenly in vehicle traveling process, generator output voltage can keep 28V constant.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
As shown in the figure, variable-speed constant-voltage direct-current brushless generator of the present invention, comprises generator, and the power output end of described generator is electrically connected to the power input of electric current and voltage rotating speed display controller module, rectification filtering module and voltage detection module respectively; The signal output part of described electric current and voltage rotating speed display controller module is electrically connected to the signal input part of direct current output module, and electric current and voltage rotating speed display controller module is connected with the communication of RS-485 communication module; The power output end of described rectification filtering module is electrically connected to the power input of electric current and voltage rotating speed display controller module, current detection module and preload module respectively; The signal output part of described current detection module is electrically connected to the signal input part of electric current and voltage rotating speed display controller module, direct current output module, working power handover module, low speed overcurrent voltage protection module and current compensation module respectively; The signal output part of described voltage detection module is electrically connected to the signal input part of PID adjustment module by described low speed overcurrent voltage protection module and far-end control module respectively; The signal output part of described current compensation module is electrically connected to the signal input part of described PID adjustment module; The signal output part of PID adjustment module is electrically connected to the signal input part of PWM and power driver module, and the signal input part of described engine is electrically connected to the signal output part of voltage excitation module by described PWM and power driver module and working power handover module.
Its operation principle is: after generator speed is greater than 1500r/min, voltage regulator is devoted oneself to work and set up voltage, the voltage signal of generator armature winding becomes a pulsating dc voltage signal through bridge rectifier filtration module, this voltage signal is delivered to PID adjustment module set reference signal with voltage after differential shaping together with, PID adjustment module output signal is through PWM and the orthogonal ripple signal of power driver module pulse-width modulation, by drive circuit, control the size of exciter current of generator, thereby regulator generator output voltage, make generator output voltage be stabilized in load voltage value.The output voltage signal of generator and the reference voltage of operational amplifier compare, signal voltage value is operational amplifier output low level during higher than the reference voltage value of operational amplifier, high power valve turn-offs, cut off the power supply of magnet exciting coil, generator output voltage is reduced, when signal voltage value operational amplifier output high level during lower than the reference voltage value of operational amplifier, high power valve conducting, the electric current of magnet exciting coil increases, and the voltage of generator is raise.Pass through like this size of current of the voltage make-to-break ratio regulator generator excitation winding in regulator generator excitation winding, thereby the voltage stabilization of controlling generator is at rated value.By Hall current sensor, detect the output current of generator, and this magnitude of current is converted to the voltage signal of answering in contrast, through current compensation module, send into PID adjustment module, to accelerate the reaction speed of generator, improve the dynamic property of generator output voltage.
Claims (1)
1. a variable-speed constant-voltage direct-current brushless generator, comprises generator, it is characterized in that: the power output end of generator is electrically connected to the power input of electric current and voltage rotating speed display controller module, rectification filtering module and voltage detection module respectively; The signal output part of described electric current and voltage rotating speed display controller module is electrically connected to the signal input part of direct current output module, and electric current and voltage rotating speed display controller module is connected with the communication of RS-485 communication module; The power output end of described rectification filtering module is electrically connected to the power input of electric current and voltage rotating speed display controller module, current detection module and preload module respectively; The signal output part of described current detection module is electrically connected to the signal input part of electric current and voltage rotating speed display controller module, direct current output module, working power handover module, low speed overcurrent voltage protection module and current compensation module respectively; The signal output part of described voltage detection module is electrically connected to the signal input part of PID adjustment module by described low speed overcurrent voltage protection module and far-end control module respectively; The signal output part of described current compensation module is electrically connected to the signal input part of described PID adjustment module; The signal output part of PID adjustment module is electrically connected to the signal input part of PWM and power driver module, and the signal input part of described generator is electrically connected to the signal output part of voltage excitation module by described PWM and power driver module and working power handover module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110380905.2A CN102368676B (en) | 2011-11-25 | 2011-11-25 | Variable-speed constant-voltage direct-current brushless generator |
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| CN201110380905.2A CN102368676B (en) | 2011-11-25 | 2011-11-25 | Variable-speed constant-voltage direct-current brushless generator |
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| CN102368676A CN102368676A (en) | 2012-03-07 |
| CN102368676B true CN102368676B (en) | 2014-03-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750422B (en) * | 2012-07-03 | 2014-12-31 | 中国东方电气集团有限公司 | Design method of electric car driving system |
| CN109450231B (en) * | 2018-11-15 | 2024-01-16 | 全球能源互联网研究院有限公司 | Current driving device of high-power device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990006016A1 (en) * | 1988-11-14 | 1990-05-31 | Sundstrand Corporation | Variable speed constant frequency start system with selectable input power limiting |
| CN102005843A (en) * | 2010-11-21 | 2011-04-06 | 沈阳工业大学 | Brushless double-fed wind driven generator and method for controlling brushless double-fed wind driven generating system |
| CN202334425U (en) * | 2011-11-25 | 2012-07-11 | 郑州金阳电气有限公司 | Variable-speed constant-voltage brushless direct current generator |
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2011
- 2011-11-25 CN CN201110380905.2A patent/CN102368676B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990006016A1 (en) * | 1988-11-14 | 1990-05-31 | Sundstrand Corporation | Variable speed constant frequency start system with selectable input power limiting |
| CN102005843A (en) * | 2010-11-21 | 2011-04-06 | 沈阳工业大学 | Brushless double-fed wind driven generator and method for controlling brushless double-fed wind driven generating system |
| CN202334425U (en) * | 2011-11-25 | 2012-07-11 | 郑州金阳电气有限公司 | Variable-speed constant-voltage brushless direct current generator |
Non-Patent Citations (2)
| Title |
|---|
| 无刷双馈风力发电机变速恒频控制研究;王峰等;《电力电子技术》;20110831;第45卷(第8期);全文 * |
| 王峰等.无刷双馈风力发电机变速恒频控制研究.《电力电子技术》.2011,第45卷(第8期),全文. |
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