CN201315563Y - Control circuit of digital variable frequency generator controller - Google Patents
Control circuit of digital variable frequency generator controller Download PDFInfo
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- CN201315563Y CN201315563Y CNU2008200991343U CN200820099134U CN201315563Y CN 201315563 Y CN201315563 Y CN 201315563Y CN U2008200991343 U CNU2008200991343 U CN U2008200991343U CN 200820099134 U CN200820099134 U CN 200820099134U CN 201315563 Y CN201315563 Y CN 201315563Y
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Abstract
The utility model discloses a control circuit of a digital variable frequency generator controller, comprising a central processing unit, a working power supply circuit, a three-phase alternating current half-bridge rectifier circuit, a three-phase alternating current sampling and three-phase half-bridge rectifier isolation control circuit, a rectifier voltage sampling circuit, a power conversion circuit, a power conversion bridge drive circuit, an output AC voltage and load current sampling absolute value circuit and a stepping motor drive control circuit, wherein the three-phase alternating current sampling and three-phase half-bridge rectifier isolation control circuit consists of resistances R13, R14, R15, R16, R17, R18, R19, R110 and R11, filter capacitors C540, C542 and C543, diodes D04, D05 and D06, an operational amplifier U81, a four-optocoupler U61, triodes T85, T86 and T87, and diodes D61, D62, D63 and D64. The control circuit carries out the full digital processing for various signals, and has high reliability of products, low production debugging cost, stable and reliable performance; and the degree of stability of the output alternating current is more than 2 percent, and the harmonic is less than 2.5 percent.
Description
Technical field
The utility model relates to a kind of control circuit of digital frequency conversion generator.
Background technology
Conventional electric generators is made up of engine and excitation electromotor, the excitation electromotor output AC.Because the excitation electromotor loss is big, have only 55% so the complete machine conversion efficiency is low, conversion efficiency is the highest, its harmonic wave of output voltage is big, the output voltage stabilization degree is low, makes conventional electric generators inapplicable to demanding precision instrument of power quality and various household electrical appliances, as household appliances such as computer, refrigerators; And, make traditional excitation generator inconvenience carry because the excitation generator volume is big, self is heavy.On the conventional electric generators basis, digital frequency conversion generator has appearred, and it is made up of engine, magneto, digital frequency conversion generator controller and engine throttle adjuster valve.The digital frequency conversion generator controller is the core component of digital frequency conversion generator, requirement has reliable and stable, cost is low, volume is little in light weight, the characteristics that the harmonic wave of output voltage small voltage is stable, the effect of digital frequency conversion generator controller is that the frequency with magneto output is that the three-phase alternating current of 300-600HZ is converted to the alternating current output that frequency is 50/60Hz, the digital frequency conversion generator controller can make engine operation in optimum state according to load size adjustment engine throttle simultaneously, because magneto conversion efficiency height, its conversion efficiency reaches 85% and make generator efficiency than the high 20-40% of traditional excitation generator according to the load size to the timely adjustment of engine throttle, has good energy-saving effect.The alternating current via controller treatment conversion output of magneto output, the alternating current harmonic wave of controller output is less than 2.5%, stability is higher than 2%, and the alternating current that makes digital frequency conversion generator export can satisfy the instructions for use to demanding precision instrument of power quality and various household electrical appliances.Because the little weight that makes digital frequency conversion generator in light weight of magneto volume only has conventional electric generators half, volume reduces 1/3, is easy to carry.The digital frequency conversion generator controller of prior art is because shortcomings such as the ubiquity reliability is relatively poor, cost height can not satisfy the market demand that replaces conventional electric generators fully.
Summary of the invention
The utility model at the digital frequency conversion generator controller of prior art because the deficiency in its design, provide a kind of reliability height, cost low, produce that debugging is simple, the control circuit of the digital frequency conversion generator controller of output voltage stabilization.
The technical solution of the utility model: the control circuit of digital frequency conversion generator controller comprises central processing unit CPU, load current sensor, output voltage sensor, working power circuit, three-phase alternating current half-bridge rectification circuit, three-phase alternating current sampling and three-phase half-bridge rectification isolation control circuit, commutating voltage sample circuit, power conversion circuit, Power Conversion bridge drive circuit, Power Conversion bridge transient current sampling sensor, output AC voltage sampled signal absolute value circuit, load current sampling absolute value circuit, step motor drive control circuit; It is characterized in that: described three-phase alternating current sampling and three-phase half-bridge rectification isolation drive control circuit are by resistance R 13, R14, R15, R16, R17, R18, R19, R110, R11, filter capacitor C540, C542, C543, diode D04, D05, D06, operational amplifier U81,4 optocoupler U61, triode T85, T86, T87, diode D61, D62, D63, D64 form;
Three-phase alternating current A phase voltage UA is connected to divider resistance R13, after divider resistance R13, R14, R15 and the filtering of filter capacitor C540 dividing potential drop, obtains A phase voltage sampled signal DUA; A phase voltage sampled signal DUA is connected to the homophase follower input of being made up of resistance R 541, operational amplifier U81A, diode D04, through homophase follower output A phase voltage sampled signal DUAO; DUAO is connected to an analog input end of CPU;
Three-phase alternating current B phase voltage UB is connected to divider resistance R16, after divider resistance R16, R17, R18 and the filtering of filter capacitor C542 dividing potential drop, obtains B phase voltage sampled signal DUB; B phase voltage sampled signal DUB is connected to the homophase follower input of being made up of resistance R 542, operational amplifier U81B, diode D05, through homophase follower output B phase voltage sampled signal DUBO; DUBO is connected to an analog input end of CPU;
Three-phase alternating current C phase voltage UC is connected to divider resistance R19, after divider resistance R19, R110, R111 and the filtering of filter capacitor C543 dividing potential drop, obtains C phase voltage sampled signal DUC; C phase voltage sampled signal DUC is connected to the homophase follower input of being made up of resistance R 543, operational amplifier U81C, diode D06, through homophase follower output C phase voltage sampled signal DUCO; C phase voltage sampled signal DUCO is connected to an analog input end of CPU;
Central processing unit CPU is exported three-phase half-bridge rectification circuit controllable silicon SCR 50, control signal SC1, the SC2 of SCR51, SCR52, SC3 according to commutating voltage VDC sampled signal AN3, three-phase alternating current sampled signal DUAO, DUBO, the DUCO of input, thereby commutating voltage VDC is controlled at the arts demand value;
The control signal SC1 of controllable silicon SCR 50 is connected to R61, and wherein one tunnel (first via) in resistance R 61 and 4 optocoupler U61 isolated the shutoff control signal SC1O of the optical couple isolation drive circuit output controllable silicon SCR 50 of optocoupler, resistance R 64, resistance R 67, triode T85, resistance R 50, diode D61 composition;
The control signal SC2 of controllable silicon SCR 51 is connected to resistance R 62, and wherein one tunnel (Third Road) in resistance R 62 and 4 optocoupler U61 isolated the shutoff control signal SC2O of the optical couple isolation drive circuit output controllable silicon SCR 51 of optocoupler, resistance R 65, R68, triode T86, resistance R 51, diode D62 composition;
The control signal SC3 of controllable silicon SCR 52 is connected to resistance R 63, and wherein one tunnel (the four tunnel) in resistance R 63 and 4 optocoupler U61 isolates the shutoff control signal SC3O of the light lotus root isolated drive circuit output controllable silicon SCR 53 of optocoupler, resistance R 66, R69, triode T87, resistance R 52, diode D63 composition.
The control circuit of the utility model digital frequency conversion generator controller has following characteristics:
1, adopt singlechip CPU as CPU, various signals are carried out total digitalization processing, make the digital frequency conversion controller have the product reliability height, production debugging cost alternating current stability low, its output is higher than 2%, harmonic wave is less than 2.5%.
2, adopted the detection of transient current transducer to the bridge circuit transient current in the power conversion circuit H bridge, made controller have good overload flow defencive function, controller performance is reliable and stable.
3, rectifier output voltage VDC fully in time is controlled at desired value, and controlled rectification circuit simplicity of design, cost are low, have extreme high reliability.
Description of drawings
Fig. 1 is the utility model controller principle block diagram;
Fig. 2 is three-phase alternating current sampling and three-phase half-bridge rectification isolation drive control circuit;
Fig. 3 is Power Conversion bridge drive circuit, power conversion circuit and Power Conversion bridge transient current sampling sensor circuit;
Fig. 4 is a load current sampling absolute value circuit;
Fig. 5 is an output AC voltage sampled signal absolute value circuit;
Fig. 6 is the step motor drive control circuit;
Fig. 7 is the central processor unit circuit.
Embodiment
Digital frequency conversion generator controller principle figure as shown in Figure 1, the control circuit of controller comprises central processing unit CPU, load current sensor, output voltage sensor, working power circuit, three-phase alternating current half-bridge rectification circuit, three-phase alternating current sampling and three-phase half-bridge rectification isolation control circuit, the commutating voltage sample circuit, power conversion circuit, Power Conversion bridge drive circuit, Power Conversion bridge transient current sampling sensor, output AC voltage sampled signal absolute value circuit, load current sampling absolute value circuit, step motor drive control circuit and central processor unit circuit; Wherein, three-phase alternating current half-bridge rectification circuit is direct voltage VDC with the three-phase alternating current electric rectification of magneto output, power conversion circuit is converted to broad-adjustable hf and hv pulse with the direct voltage VDC of input, and output frequency is the alternating current of 50/60Hz after the LC filter smoothing filtering of hf and hv pulse in Power Conversion drive circuit H bridge.
The output signal of output voltage sensor is connected to central processing unit CPU after output AC voltage sampled signal absolute value circuit amplifies, output pulse width control signal PWM1, PWM2 after the CPU computing, PWM1, PWM2 are through the control signal of 4 switching tubes of Power Conversion drive circuit output H bridge, the shutoff and the conducting of control switch pipe.The commutating voltage linear optical coupling isolating amplifier circuit of commutating voltage sample circuit detects the value of commutating voltage VDC, the detected value of VDC is input to the analog port of CPU.Three-phase alternating current sampled signal circuit is connected to three analog input ends of CPU through three road homophase followers, CPU exports three tunnel control signals according to rectified voltage signal, the three-phase alternating current sampled signal of input, three tunnel control signals produce three road silicon controlled drive control signal through three road optical couple isolation drive circuits after drive triode, control three rectification circuit silicon controlled break-makes, commutating voltage is controlled at desired value immediately.
The load current sampled signal of load current sensor output is connected to the CPU analog port after load current sampled signal absolute value circuit amplifies; the detected bridge current signal value of Power Conversion bridge transient current detecting sensor is through relatively producing interrupt signal to CPU in the back with preset value; CPU turn-offs the pwm pulse of output immediately; simultaneously according to detected output voltage and load current carry out correctly, overload flow is protected timely; make controller have high reliability, avoid misoperation.
Working power circuit produces the various working powers that controller needs.More than part same as the prior art be not further described.
In the digital frequency conversion generator controller circuitry connection layout of the specific embodiment shown in accompanying drawing 2,3,4,5,6,7:
Three-phase alternating current output dc voltage VDC after the rectification of half-bridge rectification circuit of digital frequency conversion generator magneto output, VDC export the analog input port of commutating voltage value signal AN3 to central processor CPU by the commutating voltage sample circuit of being made up of operational amplifier U77, linear light lotus root isolated amplifier TIL300 after resistance R 210, resistance R 211, W1 dividing potential drop.
Three-phase alternating current A phase voltage UA is connected to divider resistance R13, after divider resistance R13, R14, R15 and the filtering of filter capacitor C540 dividing potential drop, obtains A phase voltage sampled signal DUA; A phase voltage sampled signal DUA is connected to the homophase follower input of being made up of resistance R 541, operational amplifier U81A, diode D04, through homophase follower output A phase voltage sampled signal DUAO; DUAO is connected to an analog input end of single-chip microcomputer central processing unit CPU.
Three-phase alternating current B phase voltage UB is connected to divider resistance R16, after divider resistance R16, R17, R18 and the filtering of filter capacitor C542 dividing potential drop, obtains B phase voltage sampled signal DUB; B phase voltage sampled signal DUB is connected to the homophase follower input of being made up of resistance R 542, operational amplifier U81B, diode D05, through homophase follower output B phase voltage sampled signal DUBO; DUBO is connected to an analog input end of single-chip microcomputer central processing unit CPU.
Three-phase alternating current C phase voltage UC is connected to divider resistance R19, after divider resistance R19, R110, R111 and the filtering of filter capacitor C543 dividing potential drop, obtains C phase voltage sampled signal DUC; C phase voltage sampled signal DUC is connected to the homophase follower input of being made up of resistance R 543, operational amplifier U81C, diode D06, through homophase follower output C phase voltage sampled signal DUCO; C phase voltage sampled signal DUCO is connected to an analog input end of single-chip microcomputer central processing unit CPU.
Central processing unit CPU is exported three-phase half-bridge rectification circuit controllable silicon SCR 50, control signal SC1, the SC2 of SCR51, SCR52, SC3 according to commutating voltage VDC sampled signal AN3, three-phase alternating current sampled signal DUAO, DUBO, the DUCO of input, thereby commutating voltage VDC is controlled at desired value.
The control signal SC1 of controllable silicon SCR 50 is connected to R61, and wherein one tunnel (first via) in resistance R 61 and 4 optocoupler U61 isolated the shutoff control signal SC1O of the optical couple isolation drive circuit output controllable silicon SCR 50 of optocoupler, resistance R 64, R67, triode T85, resistance R 50, diode D61 composition.
The control signal SC2 of controllable silicon SCR 51 is connected to resistance R 62, and wherein one tunnel (Third Road) in resistance R 62 and 4 optocoupler U61 isolated the shutoff control signal SC2O of the optical couple isolation drive circuit output controllable silicon SCR 51 of optocoupler, resistance R 65, R68, triode T86, resistance R 51, diode D62 composition.
The control signal SC3 of controllable silicon SCR 52 is connected to resistance R 63, and wherein one tunnel (the four tunnel) in resistance R 63 and 4 optocoupler U61 isolates the shutoff control signal SC3O of the optical couple isolation drive circuit output controllable silicon SCR 53 of optocoupler, resistance R 66, R69, triode T87, resistance R 52, diode D63 composition.
The earth terminal of the output of light lotus root U61 is connected to rectification bridge output end with the intensifier circuit reliability by diode D64, resistance R 56 (resistance 0 Europe).D64, D61, D62, D63 proposed model are FR107.
Power conversion circuit is made up of 4 switch transistor T 1, T2, T3, T4, transient current transducer U45, filter inductance L6, L7, filter capacitor C46, C48 as shown in Figure 3, power conversion circuit is converted to high-frequency impulse with the direct voltage DCV of input, output 50/60H alternating current behind L6, L7, C46, C48 smothing filtering.Output signal AN1 after the respective absolute values circuit amplifies of the load current that load current sensor U13 shown in accompanying drawing 4,5, output voltage sensor U16 produce, output voltage sampled signal VIN1, VIN2, the analog input end that AN2 is connected to CPU, output pulse width modulation signal PWM1, PWM2 after the CPU computing.
Pulse-width signal PWM1, PWM2 produce 4 tunnel drive control signal through the Power Conversion bridge drive circuit that light lotus root U40, U41, U42, U43 form, and resistance R44, the R46, R48, the R410 that are connected respectively to 4 switching tubes of H bridge finish the shutoff of 4 switching tubes is controlled.The signal of transient current transducer U45 output and preset signals relatively back produce the INT interrupt signal to CPU, and CPU carries out the over-current and-load protection according to INT, AN1, AN2 signal, makes controller have high reliability.
The step motor drive control circuit of Fig. 6 and the central processor unit circuit of Fig. 7 are a kind of connecting circuits of routine, are not further introduced.
Claims (2)
1, the control circuit of digital frequency conversion generator controller comprises central processing unit CPU, load current sensor, output voltage sensor, working power circuit, three-phase alternating current half-bridge rectification circuit, three-phase alternating current sampling and three-phase half-bridge rectification isolation control circuit, commutating voltage sample circuit, power conversion circuit, Power Conversion bridge drive circuit, Power Conversion bridge transient current sampling sensor, output AC voltage sampled signal absolute value circuit, load current sampling absolute value circuit, step motor drive control circuit; It is characterized in that: described three-phase alternating current sampling and three-phase half-bridge rectification isolation drive control circuit are by resistance R 13, R14, R15, R16, R17, R18, R19, R110, R11, filter capacitor C540, C542, C543, diode D04, D05, D06, operational amplifier U81,4 optocoupler U61, triode T85, T86, T87, diode D61, D62, D63, D64 form;
Three-phase alternating current A phase voltage UA is connected to divider resistance R13, after divider resistance R13, R14, R15 and the filtering of filter capacitor C540 dividing potential drop, obtains A phase voltage sampled signal DUA; A phase voltage sampled signal DUA is connected to the homophase follower input of being made up of resistance R 541, operational amplifier U81A, diode D04, through homophase follower output A phase voltage sampled signal DUAO; DUAO is connected to an analog input end of CPU;
Three-phase alternating current B phase voltage UB is connected to divider resistance R16, after divider resistance R16, R17, R18 and the filtering of filter capacitor C542 dividing potential drop, obtains B phase voltage sampled signal DUB; B phase voltage sampled signal DUB is connected to the homophase follower input of being made up of resistance R 542, operational amplifier U81B, diode D05, through homophase follower output B phase voltage sampled signal DUBO; DUBO is connected to an analog input end of CPU;
Three-phase alternating current C phase voltage UC is connected to divider resistance R19, after divider resistance R19, R110, R111 and the filtering of filter capacitor C543 dividing potential drop, obtains C phase voltage sampled signal DUC; C phase voltage sampled signal DUC is connected to the homophase follower input of being made up of resistance R 543, operational amplifier U81C, diode D06, through homophase follower output C phase voltage sampled signal DUCO; C phase voltage sampled signal DUCO is connected to an analog input end of CPU;
Central processing unit CPU is exported three-phase half-bridge rectification circuit controllable silicon SCR 50, control signal SC1, the SC2 of SCR51, SCR52, SC3 according to commutating voltage VDC sampled signal AN3, three-phase alternating current sampled signal DUAO, DUBO, the DUCO of input, thereby commutating voltage VDC is controlled at the arts demand value;
The control signal SC1 of controllable silicon SCR 50 is connected to R61, and wherein one tunnel optical couple isolation drive circuit of isolating optocoupler, resistance R 64, resistance R 67, triode T85, resistance R 50, diode D61 composition in resistance R 61 and 4 optocoupler U61 is exported the shutoff control signal SC1O of controllable silicon SCR 50;
The control signal SC2 of controllable silicon SCR 51 is connected to resistance R 62, and wherein one tunnel optical couple isolation drive circuit of isolating optocoupler, resistance R 65, R68, triode T86, resistance R 51, diode D62 composition in resistance R 62 and 4 optocoupler U61 is exported the shutoff control signal SC2O of controllable silicon SCR 51;
The control signal SC3 of controllable silicon SCR 52 is connected to resistance R 63, and wherein one tunnel optical couple isolation drive circuit of isolating optocoupler, resistance R 66, R69, triode T87, resistance R 52, diode D63 composition in resistance R 63 and 4 optocoupler U61 is exported the shutoff control signal SC3O of controllable silicon SCR 53.
2, the control circuit of digital frequency conversion generator controller according to claim 1 is characterized in that: the earth terminal of the output of optocoupler U61 is connected to the output of three-phase alternating current half-bridge rectification circuit by diode D64, resistance R 56.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200991343U CN201315563Y (en) | 2008-12-19 | 2008-12-19 | Control circuit of digital variable frequency generator controller |
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| CNU2008200991343U CN201315563Y (en) | 2008-12-19 | 2008-12-19 | Control circuit of digital variable frequency generator controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751929A (en) * | 2011-04-19 | 2012-10-24 | 宁波斯巴克发动机有限公司 | Electric control system of digital generator |
| CN102751892A (en) * | 2012-07-17 | 2012-10-24 | 乐清市信达利实业有限公司 | Alternating current voltage sampling circuit of inverter and inverter comprising same |
| CN103346716A (en) * | 2013-06-17 | 2013-10-09 | 杭州电子科技大学 | Two-phase four-wire step motor driver based on software subdivision |
-
2008
- 2008-12-19 CN CNU2008200991343U patent/CN201315563Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751929A (en) * | 2011-04-19 | 2012-10-24 | 宁波斯巴克发动机有限公司 | Electric control system of digital generator |
| CN102751892A (en) * | 2012-07-17 | 2012-10-24 | 乐清市信达利实业有限公司 | Alternating current voltage sampling circuit of inverter and inverter comprising same |
| CN102751892B (en) * | 2012-07-17 | 2015-07-15 | 乐清市信达利实业有限公司 | Alternating current voltage sampling circuit of inverter and inverter comprising same |
| CN103346716A (en) * | 2013-06-17 | 2013-10-09 | 杭州电子科技大学 | Two-phase four-wire step motor driver based on software subdivision |
| CN103346716B (en) * | 2013-06-17 | 2015-08-12 | 杭州电子科技大学 | A kind of two-phase four line stepper motor driver based on digital subdividing |
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Granted publication date: 20090923 Termination date: 20121219 |