CN205319962U - Digital high voltage dc source control system - Google Patents
Digital high voltage dc source control system Download PDFInfo
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- CN205319962U CN205319962U CN201520984266.4U CN201520984266U CN205319962U CN 205319962 U CN205319962 U CN 205319962U CN 201520984266 U CN201520984266 U CN 201520984266U CN 205319962 U CN205319962 U CN 205319962U
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Abstract
The utility model belongs to the technical field of the power, in particular to digital high voltage dc source control system. Including hardware subtotal system flow part, the hardware part is main including the control unit, DSP, drive protection circuit, full bridge inverter, temperature sensor, constant temperature control circuit, current sensor, current detection circuit, voltage transformer, voltage feedback circuit, communication circuit, host computer, display element and electric wire netting. The utility model discloses the system can become steady direct current with the ac inversion of electric wire netting, has simple structure, good reliability, advantage that the controllability is strong, has the linear function of adjusting of control by temperature change, overcurrent protection and voltage simultaneously, accords with that DC power supply is digital, the modular development trend, is fit for the wide application at electric power system.
Description
Technical field
This utility model belongs to power technique fields, particularly to a kind of digital high-voltage DC power control system.
Background technology
Along with the fast development of power industry and manufacturing technology, DC equipment industry, aviation, the field such as civilian utilization be continuously increased. The application of high-voltage DC power supply is very widely, and traditional high voltage power supply often directly adopts transformator directly to boost the mode of rectification or adopt the mode of voltage multiplying rectifier to realize. Limitation due to the voltage characteristic of high voltage power supply itself and control, making traditional high-voltage DC power supply self there is many defects, volume weight is relatively big not to the utmost, and the output voltage ripple of power-supply system is very big, work efficiency neither be significantly high, causes that its application has certain limitation. And constantly improving and development along with modern power electronics technology, digitized, high frequency, miniaturization and modularity are the inexorable trends of high-voltage DC power supply development.
Summary of the invention
In order to solve the technical problem that prior art exists; the utility model proposes a kind of digital high-voltage DC power control system; purpose is to provide and can convert the alternating current of electrical network to stable unidirectional current, has the control system of the function that temperature control, overcurrent protection and voltage linear regulate simultaneously.
This utility model is achieved through the following technical solutions utility model purpose:
Digital high-voltage DC power control system, including hardware components and system flow part, wherein hardware components is to be connected with the input of DSP by the outfan of control unit, the input of Drive Protecting Circuit is connected with the pwm signal outfan of DSP, the control signal input of full bridge inverter is connected with the outfan of Drive Protecting Circuit, the power input of full bridge inverter is connected with the outfan of electrical network, temperature sensor is fixed on the power device surface of full bridge inverter, the input of constant temperature control circuit is connected with the outfan of temperature sensor, the signal input part of the outfan gentleness DSP of constant temperature control circuit is connected, the wire punching of full bridge inverter input and outfan is through over-current sensor, the outfan of current transformer is connected with the input of current detection circuit, the outfan of current detection circuit is connected with the signal input part of DSP, the primary side input of voltage transformer and full bridge inverter input and outfan are in parallel, the secondary side outfan of voltage transformer is connected with the input of voltage feedback circuit, the outfan of voltage feedback circuit is connected with the signal input part of DSP, the input of communicating circuit is connected with the communication interface of DSP, the outfan of communicating circuit is connected with the communication interface of host computer, the input of display unit is connected with the signal output part of DSP.
Described full bridge inverter 7 is made up of IGBT, electric capacity C1-C4, resistance R1-R4 and diode D1-D4, wherein compose in parallel bridge circuit after the series connection between two of IGBT pipe, resistance R1-R4 and diode D1-D4 parallel connection are in that electric capacity C1-C4 is composed in series buffer circuit, buffer circuit is in parallel with the collector and emitter of IGBT, binding post a, b are DC voltage output end, are connected between two IGBT of two brachium pontis; The impact to IGBT pipe of the transient operation voltage avoided by buffer circuit; reduce the switching loss of IGBT; the protection safe and reliable operation of rectification unit; in IGBT turn off process; electric capacity C1-C4 is charged by diode D1-D4; absorbing the du/dt that turn off process produces, after IGBT opens, the voltage at electric capacity C1-C4 two ends is discharged by resistance R1-R4.
Described current detection circuit, measure traverse line is needed to pass from the center of current transformer, the power end of current transformer is connected respectively at+15V and 15V power supply, the outfan of the power end of current transformer is connected with the positive input terminal of operational amplifier LM324, resistance R6, after electric capacity C8 parallel connection, one end is connected with the positive input terminal of operational amplifier LM324, resistance R6, the other end after electric capacity C8 parallel connection is connected to the ground and connects, the power supply positive input terminal of operational amplifier LM324 is connected with 5V source of stable pressure, the power supply negative input end of operational amplifier LM324 is connected to the ground and connects, the current signal output end of operational amplifier LM324 is connected with the signal input part of DSP5.
The voltage feedback signal of described voltage feedback circuit is through the positive input terminal of resistance R5 to voltage follower, the circuit between one end and resistance R5 to voltage follower after resistance R6, electric capacity C5, C6 and diode D5 parallel connection is connected, the other end after resistance R6, electric capacity C5, C6 and diode D5 parallel connection is connected to the ground and connects, the outfan of voltage follower is connected with the signal input part of DSP5, one end of electric capacity C7 is connected to outfan and the DSP5 branch road of voltage follower, and the other end of electric capacity C7 is connected to the ground and connects; Wherein C5 effect is the impurity in filtered signal, steady dot circuit input voltage, reduces signal drift, generally chooses the noninductive electric capacity of high frequency; Resistance R5, R6 play dividing potential drop effect, and voltage feedback circuit measures voltage equal to resistance R6 both end voltage, and its magnitude of voltage is the R6/R5+R6 of total voltage.
In the temperature-control circuit of described temperature sensor, the outfan of temperature sensor PTC is connected with the positive input terminal of operational amplifier M, the positive input terminal of operational amplifier M is connected with the negative terminal of power supply through resistance R8, the negative input end of operational amplifier M is connected through resistance R7 and power supply, electric capacity C9, it is connected between negative input end and the signal output part of operational amplifier M after resistance R9 parallel connection, the signal output part of operational amplifier M is connected through the positive input terminal of resistance R0 with operational amplifier N, resistance R11 is connected between positive input terminal and the signal output part of operational amplifier N, the two ends of electric capacity C10 are connected with the positive input terminal of operational amplifier N and ground respectively, the two ends of resistance R12 are connected with the negative input end of operational amplifier N and ground respectively, the two ends of resistance R12 are connected with the negative input end of operational amplifier N and signal output part respectively, the signal output part of operational amplifier N is through resistance R14, the control end of light emitting diode D6 and field effect transistor Q5 is connected, field effect transistor Q5 two ends respectively with ground, thermoelectric cooling module is connected.
Advantage of the present utility model and providing the benefit that:
This utility model digital high-voltage DC power control system can convert the alternating current of electrical network to stable unidirectional current; there is simple in construction, good reliability, advantage that controllability is strong; there is the function that temperature control, overcurrent protection and voltage linear regulate simultaneously; meet DC source digitized, modular development trend, be adapted at the direct current power apparatus field extensive use of power system.
Below in conjunction with the drawings and specific embodiments, this utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is this utility model digital high-voltage DC power control system structure sketch;
Fig. 2 is this utility model full bridge inverter figure;
Fig. 3 is this utility model current detection circuit figure;
Fig. 4 is this utility model voltage feedback circuit figure figure;
Fig. 5 is this utility model temperature-control circuit figure;
Fig. 6 is this utility model system main program flow chart;
Fig. 7 is this utility model fault detect subroutine flow chart.
Wherein: 1, display unit; 2, control unit; 3, communicating circuit; 4, host computer; 5, DSP; 6, Drive Protecting Circuit; 7, full bridge inverter; 8, electrical network; 9, constant temperature control circuit; 10, temperature sensor; 11, current detection circuit; 12, current sensor; 13, voltage feedback circuit; 14, voltage transformer.
Detailed description of the invention
This utility model is a kind of digital high-voltage DC power control system, including hardware components and system flow part. as it is shown in figure 1, hardware components mainly includes control unit 2, DSP5, Drive Protecting Circuit 6, full bridge inverter 7, temperature sensor 10, constant temperature control circuit 9, current sensor 12, current detection circuit 11, voltage transformer 14, voltage feedback circuit 13, communicating circuit 3, host computer 4, display unit 1 and electrical network 8, wherein the outfan of control unit 2 is connected with the input of DSP5, the input of Drive Protecting Circuit 6 is connected with the pwm signal outfan of DSP5, the control signal input of full bridge inverter 7 is connected with the outfan of Drive Protecting Circuit 6, the power input of full bridge inverter 7 is connected with the outfan of electrical network 8, temperature sensor 10 is fixed on the power device surface of full bridge inverter 7, the input of constant temperature control circuit 8 is connected with the outfan of temperature sensor 10, the signal input part of the outfan gentleness DSP5 of constant temperature control circuit 9 is connected, the wire punching of full bridge inverter 7 input and outfan is through over-current sensor 12, the outfan of current transformer 12 is connected with the input of current detection circuit 11, the outfan of current detection circuit 11 is connected with the signal input part of DSP5, the primary side input of voltage transformer 14 and full bridge inverter 7 input and outfan are in parallel, the secondary side outfan of voltage transformer 14 is connected with the input of voltage feedback circuit 13, the outfan of voltage feedback circuit 13 is connected with the signal input part of DSP5, the input of communicating circuit 3 is connected with the communication interface of DSP5, the outfan of communicating circuit 3 is connected with the communication interface of host computer 4, the input of display unit 1 is connected with the signal output part of DSP5. DSP refers to theory and technology signal being processed by the mode of numerical computations, and its English original name, digitalsignalprocessing, is called for short DSP, i.e. digital signal processor.
As shown in Figure 2, Fig. 2 is this utility model full bridge inverter figure, full bridge inverter 7 described in the utility model is made up of IGBT, electric capacity C1-C4, resistance R1-R4 and diode D1-D4, wherein compose in parallel bridge circuit after the series connection between two of IGBT pipe, resistance R1-R4 and diode D1-D4 parallel connection are in that electric capacity C1-C4 is composed in series buffer circuit, buffer circuit is in parallel with the collector and emitter of IGBT, binding post a, b are DC voltage output end, are connected between two IGBT of two brachium pontis.The impact to IGBT pipe of the transient operation voltage avoided by buffer circuit; reduce the switching loss of IGBT; the protection safe and reliable operation of rectification unit; in IGBT turn off process; electric capacity C1-C4 is charged by diode D1-D4; absorbing the du/dt that turn off process produces, after IGBT opens, the voltage at electric capacity C1-C4 two ends is discharged by resistance R1-R4. IGBT (InsulatedGateBipolarTransistor), insulated gate bipolar transistor, the compound full-control type voltage driven type power semiconductor being made up of BJT (double pole triode) and MOS (insulating gate type field effect tube))
Current detection circuit is as shown in Figure 3, measure traverse line is needed to pass from the center of current transformer, the power end of current transformer is connected respectively at+15V and 15V power supply, the outfan of the power end of current transformer is connected with the positive input terminal of operational amplifier LM324, resistance R6, after electric capacity C8 parallel connection, one end is connected with the positive input terminal of operational amplifier LM324, resistance R6, the other end after electric capacity C8 parallel connection is connected to the ground and connects, the power supply positive input terminal of operational amplifier LM324 is connected with 5V source of stable pressure, the power supply negative input end of operational amplifier LM324 is connected to the ground and connects, the current signal output end of operational amplifier LM324 is connected with the signal input part of DSP5.
Voltage feedback circuit is as shown in Figure 4, voltage feedback signal is through the positive input terminal of resistance R5 to voltage follower, the circuit between one end and resistance R5 to voltage follower after resistance R6, electric capacity C5, C6 and diode D5 parallel connection is connected, the other end after resistance R6, electric capacity C5, C6 and diode D5 parallel connection is connected to the ground and connects, the outfan of voltage follower is connected with the signal input part of DSP5, one end of electric capacity C7 is connected to outfan and the DSP5 branch road of voltage follower, and the other end of electric capacity C7 is connected to the ground and connects. Wherein C5 effect is the impurity in filtered signal, steady dot circuit input voltage, reduces signal drift, generally chooses the noninductive electric capacity of high frequency. Resistance R5, R6 play dividing potential drop effect, and voltage feedback circuit measures voltage equal to resistance R6 both end voltage, and its magnitude of voltage is the R6/R5+R6 of total voltage. Zener diode D5 and electric capacity C6 plays a protective role, it is prevented that amplifier incoming level is higher than its supply voltage, and electric capacity C7 plays voltage feedback signal filter action.
Temperature-control circuit is as shown in Figure 5, wherein the outfan of temperature sensor PTC is connected with the positive input terminal of operational amplifier M, the positive input terminal of operational amplifier M is connected with the negative terminal of power supply through resistance R8, the negative input end of operational amplifier M is connected through resistance R7 and power supply, electric capacity C9, it is connected between negative input end and the signal output part of operational amplifier M after resistance R9 parallel connection, the signal output part of operational amplifier M is connected through the positive input terminal of resistance R0 with operational amplifier N, resistance R11 is connected between positive input terminal and the signal output part of operational amplifier N, the two ends of electric capacity C10 are connected with the positive input terminal of operational amplifier N and ground respectively, the two ends of resistance R12 are connected with the negative input end of operational amplifier N and ground respectively, the two ends of resistance R12 are connected with the negative input end of operational amplifier N and signal output part respectively, the signal output part of operational amplifier N is through resistance R14, the control end of light emitting diode D6 and field effect transistor Q5 is connected, field effect transistor Q5 two ends respectively with ground, thermoelectric cooling module is connected. temperature-control circuit work process: when temperature value is higher than setting value, critesistor PTC resistance becomes big, at this moment at the in-phase input end voltage of amplifier M higher than 0V, N is arrived in signal output after amplifying, making the in-phase input end voltage of amplifier N higher than end of oppisite phase, the voltage of amplifier output+5V drives field effect transistor Q5 conducting, and thermoelectric refrigerator is started working reduction system temperature, the field effect transistor cut-off when temperature reaches normal temperature, thermoelectric refrigerator quits work.
As shown in Figure 6, Fig. 6 is this utility model system main program flow chart, and this utility model system flow part mainly includes system mastery routine and interruption subroutine. Mastery routine is responsible for the initialization of whole system, and including pointer, variable, depositor, communication module, task manager, AD acquisition module etc., project initializes, and meanwhile, also has the functions such as interruption setting, circular wait, pid control algorithm realization. The configuration containing system clock of the initialization package of whole system, the setting of house dog depositor, the arranging of universaling I/O port; Task manager initializes the setting and the distribution that refer to each intervalometer of DSP; The fault detect, the control unit that have needed in circular wait input scanner uni with communication between host computer etc. When breaking down of high-voltage DC power supply, it is as excessive in the damage of IGBT, full bridge inverter output electric current or when output is too high, all may bring potential safety hazard, it is thus desirable to the interruption subroutine arranging fault feedback specially processes these problems, by blocking the output of PWM, disconnecting extraneous power supply, ensure the stability of system, it is to avoid security incident occurs.
The system mastery routine step of digital high-voltage DC power control system is as follows:
(1) start;
(2) initialize;
(3) pointer, variable and initialization of register;
(4) communication module initializes;
(5) time manager initializes;
(6) AD acquisition module initializes;
(7) interruption entrance is set, enables and interrupt
(8) wait interrupt response, be carried out step (9), otherwise perform step (8);
(9) major cycle is entered.
As it is shown in fig. 7, Fig. 7 is this utility model fault detect interruption subroutine flow chart. Specifically comprise the following steps that
(1) interrupt starting;
(2) keep the scene intact;
(3) major loop, block PWM output are disconnected
(4) failure judgement type;
(5) failure reset;
(6) return.
Claims (5)
1. digital high-voltage DC power control system, it is characterized in that: include hardware components and system flow part, wherein hardware components is the outfan by control unit (2) and DSP(5) input be connected, the input of Drive Protecting Circuit (6) and DSP(5) pwm signal outfan be connected, the control signal input of full bridge inverter (7) is connected with the outfan of Drive Protecting Circuit (6), the power input of full bridge inverter (7) is connected with the outfan of electrical network (8), temperature sensor (10) is fixed on the power device surface of full bridge inverter (7), the input of constant temperature control circuit (9) is connected with the outfan of temperature sensor (10), the outfan gentleness DSP(5 of constant temperature control circuit (9)) signal input part be connected, the wire punching of full bridge inverter (7) input and outfan is through over-current sensor (12), the outfan of current transformer (12) is connected with the input of current detection circuit (11), the outfan of current detection circuit (11) and DSP(5) signal input part be connected, the primary side input of voltage transformer (14) and full bridge inverter (7) input and outfan are in parallel, the secondary side outfan of voltage transformer (14) is connected with the input of voltage feedback circuit (13), the outfan of voltage feedback circuit (13) and DSP(5) signal input part be connected, the input of communicating circuit (3) and DSP(5) communication interface be connected, the outfan of communicating circuit (3) is connected with the communication interface of host computer (4), the input of display unit (1) and DSP(5) signal output part be connected.
2. digital high-voltage DC power control system according to claim 1, it is characterized in that: described full bridge inverter (7) is made up of IGBT, electric capacity C1-C4, resistance R1-R4 and diode D1-D4, wherein compose in parallel bridge circuit after the series connection between two of IGBT pipe, resistance R1-R4 and diode D1-D4 parallel connection are in that electric capacity C1-C4 is composed in series buffer circuit, buffer circuit is in parallel with the collector and emitter of IGBT, binding post a, b are DC voltage output end, are connected between two IGBT of two brachium pontis; The impact to IGBT pipe of the transient operation voltage avoided by buffer circuit; reduce the switching loss of IGBT; the protection safe and reliable operation of rectification unit; in IGBT turn off process; electric capacity C1-C4 is charged by diode D1-D4; absorbing the du/dt that turn off process produces, after IGBT opens, the voltage at electric capacity C1-C4 two ends is discharged by resistance R1-R4.
3. digital high-voltage DC power control system according to claim 1, it is characterized in that: described current detection circuit (11), measure traverse line is needed to pass from the center of current transformer, the power end of current transformer is connected respectively at+15V and 15V power supply, the outfan of the power end of current transformer is connected with the positive input terminal of operational amplifier LM324, resistance R6, after electric capacity C8 parallel connection, one end is connected with the positive input terminal of operational amplifier LM324, resistance R6, the other end after electric capacity C8 parallel connection is connected to the ground and connects, the power supply positive input terminal of operational amplifier LM324 is connected with 5V source of stable pressure, the power supply negative input end of operational amplifier LM324 is connected to the ground and connects, the current signal output end of operational amplifier LM324 is connected with the signal input part of DSP5.
4. digital high-voltage DC power control system according to claim 1, it is characterized in that: the voltage feedback signal of described voltage feedback circuit (13) is through the positive input terminal of resistance R5 to voltage follower, resistance R6, electric capacity C5, the circuit between one end and resistance R5 to voltage follower after C6 and diode D5 parallel connection is connected, resistance R6, electric capacity C5, the other end after C6 and diode D5 parallel connection is connected to the ground and connects, the outfan of voltage follower is connected with the signal input part of DSP5, one end of electric capacity C7 is connected to outfan and the DSP5 branch road of voltage follower, the other end of electric capacity C7 is connected to the ground and connects, wherein C5 effect is the impurity in filtered signal, steady dot circuit input voltage, reduces signal drift, chooses the noninductive electric capacity of high frequency, resistance R5, R6 play dividing potential drop effect, and voltage feedback circuit measures voltage equal to resistance R6 both end voltage, and its magnitude of voltage is the R6/R5+R6 of total voltage.
5. digital high-voltage DC power control system according to claim 1, it is characterized in that: in the temperature-control circuit of described temperature sensor, the outfan of temperature sensor PTC is connected with the positive input terminal of operational amplifier M, the positive input terminal of operational amplifier M is connected with the negative terminal of power supply through resistance R8, the negative input end of operational amplifier M is connected through resistance R7 and power supply, electric capacity C9, it is connected between negative input end and the signal output part of operational amplifier M after resistance R9 parallel connection, the signal output part of operational amplifier M is connected through the positive input terminal of resistance R0 with operational amplifier N, resistance R11 is connected between positive input terminal and the signal output part of operational amplifier N, the two ends of electric capacity C10 are connected with the positive input terminal of operational amplifier N and ground respectively, the two ends of resistance R12 are connected with the negative input end of operational amplifier N and ground respectively, the two ends of resistance R12 are connected with the negative input end of operational amplifier N and signal output part respectively, the signal output part of operational amplifier N is through resistance R14, the control end of light emitting diode D6 and field effect transistor Q5 is connected, field effect transistor Q5 two ends respectively with ground, thermoelectric cooling module is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520984266.4U CN205319962U (en) | 2015-12-02 | 2015-12-02 | Digital high voltage dc source control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520984266.4U CN205319962U (en) | 2015-12-02 | 2015-12-02 | Digital high voltage dc source control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406739A (en) * | 2015-12-02 | 2016-03-16 | 国家电网公司 | Digital type high voltage direct current power supply control system |
| CN106253702A (en) * | 2016-08-23 | 2016-12-21 | 合肥博雷电气有限公司 | The high voltage direct current source module that a kind of DSP controls |
| CN117453185A (en) * | 2023-10-26 | 2024-01-26 | 湖南恩智测控技术有限公司 | Embedded system of digital power supply and digital power supply |
-
2015
- 2015-12-02 CN CN201520984266.4U patent/CN205319962U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406739A (en) * | 2015-12-02 | 2016-03-16 | 国家电网公司 | Digital type high voltage direct current power supply control system |
| CN106253702A (en) * | 2016-08-23 | 2016-12-21 | 合肥博雷电气有限公司 | The high voltage direct current source module that a kind of DSP controls |
| CN117453185A (en) * | 2023-10-26 | 2024-01-26 | 湖南恩智测控技术有限公司 | Embedded system of digital power supply and digital power supply |
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