CN204231247U - A kind of brushless DC generator excitation controlling device - Google Patents
A kind of brushless DC generator excitation controlling device Download PDFInfo
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- CN204231247U CN204231247U CN201420559600.7U CN201420559600U CN204231247U CN 204231247 U CN204231247 U CN 204231247U CN 201420559600 U CN201420559600 U CN 201420559600U CN 204231247 U CN204231247 U CN 204231247U
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Abstract
The utility model is a kind of brushless DC generator excitation controlling device, comprise current rectifying and wave filtering circuit part, pwm control circuit part and overvoltage, overcurrent protection part, it is characterized in that: the three-phase alternating current of generator magneto alternator is connected with current rectifying and wave filtering circuit behind the contact of relay K 1, the excitation DC that current rectifying and wave filtering circuit exports electric being added by the control of pwm control circuit, is held on the magnet exciting coil of DC generator, the output VREF of pwm control circuit and overvoltage, current foldback circuit connects, overvoltage, the input of current foldback circuit connects the output of generator, overvoltage, the output of current foldback circuit connects the coil of relay K 1, the OFF of overvoltage, current foldback circuit is connected with pwm control circuit, the positive pole that generator exports direct current is connected with pwm control circuit, overvoltage, current foldback circuit, and the negative pole that generator exports direct current is connected with the negative pole of overvoltage, current foldback circuit excitation controlling device power supply DC.
Description
Technical field
The utility model relates to a kind of brushless DC generator excitation controlling device, belongs to DC generator control technical field, is particularly useful for the excitation con-trol of vehicle-mounted chassis middle low power brush-free claw-pole synchronous generator.
Background technology
In the middle of electric power system, WZF series brush-free claw-pole synchronous generator is widely used in the supporting generating of prime mover of the rotating speed change at random driven with wind-force, wave, ocean current, small hydro etc., is also applicable to the supporting generating with vehicle chassis engine.This serial motors compact conformation, larger than merit, export DC ripple little, reliability is high, and electromagnetic interference is little, runs noise little, easy to maintenance, long service life.But load may increase at any time or reduce when DC generator is powered, generator output voltage will be caused also to reduce thereupon or increase.This is very unfavorable for power consumption equipment, particularly to requiring that the equipment of voltage stabilization easily impacts, or the inefficacy of moment.The utility model provides the excitation control circuit of a kind of WZF series brush-free claw-pole synchronous generator, realizes high-precision DC generator output voltage and controls, improve the stability of control system simultaneously.
Summary of the invention
The purpose of this utility model will provide a kind of brushless DC generator excitation controlling device exactly; for special vehicle reliably provides the direct current energy that power quality processed is high; and possess overvoltage, overcurrent automatic protection functions; ensure that the safety of equipment electricity consumption, can be used for the power-supply system such as geological prospecting, oil platform at civil area.
The technical solution of the utility model: brushless DC generator excitation controlling device of the present utility model comprises current rectifying and wave filtering circuit part, pwm control circuit part and overvoltage, overcurrent protection part, the three-phase alternating current of generator magneto alternator is connected with current rectifying and wave filtering circuit behind the contact of relay K 1, the excitation DC that current rectifying and wave filtering circuit exports electric being added by the control of pwm control circuit, is held on the magnet exciting coil of DC generator, the output VREF of pwm control circuit and overvoltage, current foldback circuit connects, overvoltage, the input of current foldback circuit connects the output of generator, overvoltage, the output of current foldback circuit connects the coil of relay K 1, the OFF of overvoltage, current foldback circuit is connected with pwm control circuit, the positive pole that generator exports direct current is connected with pwm control circuit, overvoltage, current foldback circuit, and the negative pole that generator exports direct current is connected with the negative pole of overvoltage, current foldback circuit excitation controlling device power supply DC.
Described PWM control section adopts pulse width modulator composition PID regulating circuit; Overvoltage, current foldback circuit part adopt two-way general-purpose operation amplifier composition homophase input hysteresis comparator circuit and PI regulating circuit.
Described overvoltage, current foldback circuit adopt two-way general-purpose operation amplifier composition homophase hysteresis comparator circuit and proportional integral regulating circuit PI.
The output OFF of described pwm control circuit is connected with overvoltage, current foldback circuit.
Advantage of the present utility model is mainly manifested in the following aspects: rectifying and wave-filtering electric capacity adopts ESR low, withstand voltage high aluminium electrolytic capacitor, guarantee the rotating speed of prime mover uprush or bust and load uprush or bust can bear the impact that residence produces; Pwm control circuit adopts PID regulating circuit, and fast response time, realizes the stable output of DC generator voltage; Over-voltage over-current protection circuit is made up of universal integrated amplifier; overvoltage and overcurrent protection is achieved in conjunction with PWM pulse width modulator; the three-phase alternating current of DC generator internal communication exciter can be cut off when generator or load abnormal in time, ensure that the fail safe of equipment use.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model.
Fig. 2 is current rectifying and wave filtering circuit.
Fig. 3 is pwm control circuit figure.
Fig. 4 is overvoltage, current foldback circuit figure.
Embodiment
Below in conjunction with accompanying drawing and particular hardware circuit, the utility model is described in further detail:
As left side is controlled object DC generator block diagram in Fig. 1: figure, form primarily of main generator, magneto alternator and magnet exciting coil; In figure, right side be excitation controlling device electrical principle block diagram, forms primarily of current rectifying and wave filtering circuit, pwm control circuit and overvoltage, current foldback circuit.DC generator inner permanent magnetic alternating current generator sends the three-phase alternating current (U, V, W) that voltage linearly changes with rotating speed under prime mover drags, and is connected after relay K 1 normally-closed contact with current rectifying and wave filtering circuit.After the three-phase bridge rectification filtering in excitation controlling device, by the magnetic field excitation power supply (UB+, UB-) be input to again after the switch control rule in pwm control circuit as main generator excitation coil in DC generator, for main generator provides the exciting curent with load change.
Pwm control circuit is connected with overvoltage, current foldback circuit, and when DC generator output voltage is too high, this drives relay K 1 cuts off the three-phase alternating current of magneto alternator, and DC generator magnet exciting coil stops generating after losing exciting curent; When load short circuits causes output current excessive, this circuit output signal Off blocks pwm signal to pwm control circuit, and protection generator damages because of overload.
The output VREF of pwm control circuit is connected with overvoltage, current foldback circuit, for overvoltage, current foldback circuit provide reference voltage source signal VREF.
The positive pole that DC generator exports direct current is connected with pwm control circuit, over-voltage over-current protection circuit.
The negative pole that generator exports direct current is connected with the negative pole of excitation controlling device power supply.
Fig. 2 is current rectifying and wave filtering circuit figure:
Three-phase alternating current U, V, W of magneto alternator are connected with the ac input end of rectifier bridge VC1, and wherein V, W two-way is by two groups of normally-closed contacts of relay K 1.The DC output end UB+ of rectifier bridge VC1 connects the positive pole of filter capacitor C1, and is connected with one end of the magnet exciting coil of DC generator; The other end UB-of magnet exciting coil is connected with pwm control circuit.The negative pole of relay K 1 line bag positive pole, diode V6 all meets power supply positive pole+24V, and the line bag negative pole K1con of relay K 1 is connected with the positive pole of diode V6, and is connected to overvoltage, current foldback circuit.The action that diode V6 is relay K 1 provides afterflow protective effect.
Fig. 3 is pwm control circuit figure:
Described PWM control section adopts pulse width modulator composition PID regulating circuit; Overvoltage, current foldback circuit part adopt two-way general-purpose operation amplifier composition homophase input hysteresis comparator circuit and PI regulating circuit.
Power pins 13,15 pin of pulse width modulator D1 meets supply power voltage+15V1, D1 internal reference voltage source output 16 pin exports the reference voltage V REF of 5.1V, for in-phase end 2 pin of D1 internal comparator provides reference voltage, and simultaneously for 1 pin of operational amplifier D2 in Fig. 4,7 pin provide reference voltage.
DC generator output voltage outputs to 1 pin of pulse width modulator D1 after potentiometer W1 samples, 1,9 pin of pulse width modulator D1 and resistance R1, electric capacity C2 and resistance R2, electric capacity C3 composition integral differential operation circuit, i.e. PID adjuster.PID adjuster improves the dynamic and static state performance of pressure regulation, and integral operation eliminates static difference, achieves floating pressure regulation; Differentiate, accelerate governing speed, improve dynamic property.
Output 11 pin of D1, between 14 pin and GND, be connected to damping resistance R4 and R5, Zener diode V4 and V5 respectively, be used for suitably reducing the impedance of field effect transistor V1, V2 gate driver circuit, prevent open-grid work.The source ground of V1, V2, drain electrode meets UB-altogether.
5 pin of pulse width modulator, 6 pin CSET C4 and RSET R3 determine the frequency of oscillation of chip internal oscillator; 9 pin external direct-to-ground capacitance device C5; be used for eliminating the asymmetry of pulse width period, 10 pin OFF are connected with overvoltage, current foldback circuit, are used for reception over-current signal.
Fig. 4 is overvoltage, current foldback circuit figure:
Described overvoltage, current foldback circuit adopt two-way general-purpose operation amplifier composition homophase hysteresis comparator circuit and proportional integral regulating circuit PI.
Generator output voltage signal carries out sampling 2 pin being connected to two-way general-purpose operation amplifier D2 by potentiometer W2,1 pin of D2 internal comparator, resistance R6, R7 and electric capacity C6 composition integral adjustment circuit, 12 pin of D2 are connected with the base stage of transistor V7 through resistance R8, when generator output voltage exceedes set point, namely during the reference voltage of the 2 pin voltages of D2 slightly larger than 1 pin, the voltage of 12 pin of D2 by rapid saltus step and driving transistors V7, K1con signal communicates with GND the three-phase alternating current causing Fig. 2 repeat circuit K1 action to cut off magneto alternator.According to the characteristic of pi regulator, can by regulator potentiometer W2 to meet overvoltage protection time requirement.
Current signal samples the pin 6 by being input to operational amplifier D2 after resistance R9, R11 shunting through potentiometer W3; when generator loading current value exceedes cut-off current; namely during the reference voltage of the voltage of pin 6 slightly larger than pin 7; the pin 10 output voltage saltus step of D2 is to high level, and output signal OFF controls pulse width modulator D1 and closes thus realize overcurrent protection.Resistance R20, R23 form negative feedback network, improve the antijamming capability of comparator.Resistance R24, R26 have the effect of dividing potential drop shunting.
Claims (4)
1. a brushless DC generator excitation controlling device, comprise current rectifying and wave filtering circuit part, pwm control circuit part and overvoltage, overcurrent protection part, it is characterized in that: the three-phase alternating current of generator magneto alternator is connected with current rectifying and wave filtering circuit behind the contact of relay K 1, the excitation DC that current rectifying and wave filtering circuit exports electric being added by the control of pwm control circuit, is held on the magnet exciting coil of DC generator, the output VREF of pwm control circuit and overvoltage, current foldback circuit connects, overvoltage, the input of current foldback circuit connects the output of generator, overvoltage, the output of current foldback circuit connects the coil of relay K 1, the OFF of overvoltage, current foldback circuit is connected with pwm control circuit, the positive pole that generator exports direct current is connected with pwm control circuit, overvoltage, current foldback circuit, and the negative pole that generator exports direct current is connected with the negative pole of overvoltage, current foldback circuit excitation controlling device power supply DC.
2. brushless DC generator excitation controlling device according to claim 1, is characterized in that: PWM control section adopts pulse width modulator composition PID regulating circuit; Overvoltage, current foldback circuit part adopt two-way general-purpose operation amplifier composition homophase input hysteresis comparator circuit and PI regulating circuit.
3. brushless DC generator excitation controlling device according to claim 1 and 2, is characterized in that: overvoltage, current foldback circuit adopt two-way general-purpose operation amplifier composition homophase hysteresis comparator circuit and proportional integral regulating circuit PI.
4. brushless DC generator excitation controlling device according to claim 1 and 2, is characterized in that: the output OFF of pwm control circuit is connected with overvoltage, current foldback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559600.7U CN204231247U (en) | 2014-09-26 | 2014-09-26 | A kind of brushless DC generator excitation controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420559600.7U CN204231247U (en) | 2014-09-26 | 2014-09-26 | A kind of brushless DC generator excitation controlling device |
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| Publication Number | Publication Date |
|---|---|
| CN204231247U true CN204231247U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420559600.7U Active CN204231247U (en) | 2014-09-26 | 2014-09-26 | A kind of brushless DC generator excitation controlling device |
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| CN (1) | CN204231247U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947661A (en) * | 2017-11-02 | 2018-04-20 | 湖北三江航天万峰科技发展有限公司 | A kind of high tension direct current generator control device |
| CN109727507A (en) * | 2018-12-26 | 2019-05-07 | 南京全信光电系统有限公司 | A kind of flight training simulator electrical subsystem |
-
2014
- 2014-09-26 CN CN201420559600.7U patent/CN204231247U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947661A (en) * | 2017-11-02 | 2018-04-20 | 湖北三江航天万峰科技发展有限公司 | A kind of high tension direct current generator control device |
| CN109727507A (en) * | 2018-12-26 | 2019-05-07 | 南京全信光电系统有限公司 | A kind of flight training simulator electrical subsystem |
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| GR01 | Patent grant |