CN104506047A - Operation method of inverter power supply system and inverter power supply system - Google Patents
Operation method of inverter power supply system and inverter power supply system Download PDFInfo
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- CN104506047A CN104506047A CN201510027944.2A CN201510027944A CN104506047A CN 104506047 A CN104506047 A CN 104506047A CN 201510027944 A CN201510027944 A CN 201510027944A CN 104506047 A CN104506047 A CN 104506047A
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- 238000012423 maintenance Methods 0.000 claims abstract description 23
- 239000000853 adhesive Substances 0.000 claims description 31
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- 239000003990 capacitor Substances 0.000 claims description 22
- 238000011022 operating instruction Methods 0.000 claims description 11
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
- H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
- H02M5/44—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
An embodiment of the invention discloses an operation method of an inverter power supply system, and the operation method is used for solving the problem that the DC bus has the voltage while the inverter is in the debugging maintenance state or in the ready mode. The method comprises: after connecting the input power supply for the inverter power supply system, the input power supply offers the power for the power supply circuit; the power supply circuit offers the power for the control circuit; after receiving the operation command by the inverter, the electric control loop controls the input contactor for closing; after closing the input contactor, the DC bus offers the power for the power supply circuit and the power supply circuit offers the power for the control circuit. In the embodiment, the electric control loop can control the input contactor for opening while the inverter is in the debugging maintenance state or in the ready mode, so that the DC bus has no voltage, and the input power supply offers the power for the power supply circuit, the power supply circuit offers the power for the control circuit, and the risk of electric shock or burning the electrical apparatus element can be avoided while the DC bus has no voltage.
Description
Technical field
The present invention relates to Frequency Converter Control field, particularly relate to a kind of operation method and converter power supply system of converter power supply system.
Background technology
Frequency converter is application converter technique and microelectric technique, the electric control appliance of alternating current motor is controlled by changing machine operation supply frequency mode, along with improving constantly of industrial automatization, frequency converter have also been obtained application widely, often support the use together with all kinds of electromechanical equipment, when using frequency converter, after frequency converter powers on, the power panel of frequency converter inside is powered to control board, control board sends out control signal to the inverter circuit of frequency converter, the machine operation of described transducer drive electromechanical equipment.
In prior art, the scheme that the power panel of frequency converter inside is powered to control board roughly: three-phase input power is after the inner rectified three-phase circuit of frequency converter, and powered to the power panel of frequency converter inside by DC bus, power panel is powered to control board again.
But when frequency converter needs debugging or when being in holding state, because needs are powered to power panel by DC bus, DC bus has voltage all the time, but now frequency converter, without operating load, therefore has the risk shocking by electricity or burn out electric elements.
In addition, when three-phase input electrical network phase shortage, can not the power panel of bio-occlusion frequency converter inside power, control board can not normally work, and control board cannot normally report various fault-signal, is not easy to the debugging maintenance to frequency converter.
Summary of the invention
Embodiments provide a kind of Frequency Converter Control power source method, for solving frequency converter when being in debugging maintenance or being in holding state, DC bus has the problem of voltage.
In view of this, first aspect present invention provides a kind of converter power supply system, comprising:
Input power, electric control circuit, input contactor and frequency converter, described frequency converter comprises power circuit, control circuit, rectified three-phase circuit and three-phase inverting circuit;
Described input power is connected with described power circuit;
Described power circuit is connected with described control circuit;
Described control circuit is connected with described electric control circuit;
Described electric control circuit is connected with described input contactor, and controls the break-make of described input contactor;
Described input power is connected with described rectified three-phase circuit by described input contactor;
Described rectified three-phase circuit is connected with described three-phase inverting circuit by DC bus;
Described DC bus is connected with described power circuit.
Alternatively,
Frequency converter also comprises direct current buffer circuit;
Described control circuit is connected with described direct current buffer circuit, and controls the break-make of described direct current buffer circuit;
Described rectified three-phase circuit is connected with described direct current buffer circuit;
Described direct current buffer circuit is connected with described three-phase inverting circuit by DC bus;
Described direct current buffer circuit comprises direct current buffer resistance and direct current buffer switch;
Described direct current buffer resistance and described direct current buffer switch are connected in parallel.
Alternatively,
Described input power is three-phase alternating current.
Alternatively,
Described power circuit comprises:
Three-phase input end, direct current input positive pole, direct current input negative pole, three phase rectifier filter circuit and Switching Power Supply;
Described three-phase input end is connected with described three phase rectifier filter circuit;
First output of described three phase rectifier filter circuit is connected with the input positive pole of described Switching Power Supply;
Second output of described three phase rectifier filter circuit is connected with the input negative pole of described Switching Power Supply;
Described direct current input positive pole is connected with the input positive pole of described Switching Power Supply;
Described direct current input negative pole is connected with the input negative pole of described Switching Power Supply.
Alternatively,
Described three phase rectifier filter circuit comprises the first rectifier diode (D1), the second rectifier diode (D2), the 3rd rectifier diode (D3), the 4th rectifier diode (D4), the 5th rectifier diode (D5), the 6th rectifier diode (D6), the first filter capacitor (C1) and the second filter capacitor (C2);
The negative electrode of described first rectifier diode (D1), the negative electrode of the second rectifier diode (D2), the negative electrode of the 3rd rectifier diode (D3) and the first end of the first filter capacitor (C1) are connected with described first output respectively;
The anode of described 4th rectifier diode (D4), the anode of the 5th rectifier diode (D5), the anode of the 6th rectifier diode (D6) and the second end of the second filter capacitor (C2) are connected with described second output respectively;
The anode of described first rectifier diode (D1) is connected with the negative electrode of described 4th rectifier diode (D4), draws first make contact between described first rectifier diode (D1) and described 4th rectifier diode (D4);
The anode of described second rectifier diode (D2) is connected with the negative electrode of described 5th rectifier diode (D5), draws the second contact point between described second rectifier diode (D2) and described 5th rectifier diode (D5);
The anode of described 3rd rectifier diode (D3) is connected with the negative electrode of described 6th rectifier diode (D6), draws the 3rd contact point between described 3rd rectifier diode (D3) and described 6th rectifier diode (D6);
Described first make contact, the second contact point, the 3rd contact point are connected with one end of described three-phase input end respectively;
Second end of described first filter capacitor (C1) is connected with the first end of described second filter capacitor (C2).
Alternatively,
Described power circuit also comprises the first protection diode group and the second protection diode group;
First output of described three phase rectifier filter circuit and direct current input positive pole are connected with the input positive pole of described Switching Power Supply by described first protection diode group;
Second output of described three phase rectifier filter circuit and direct current input negative pole are connected with the input negative pole of described Switching Power Supply by described second protection diode group.
Alternatively,
Described first protection diode group comprises the first protection diode (D7) and the second protection diode (D8);
Described second protection diode group comprises the 3rd protection diode (D9) and the 4th protection diode (D10);
First output of described three phase rectifier filter circuit and direct current input positive pole to be connected with the input positive pole of described Switching Power Supply by described first protection diode group and to be specially:
First output and described second of described three phase rectifier filter circuit protects the anode of diode (D8) to be connected;
Described direct current input positive pole and described first protects the anode of diode (D7) to be connected;
The negative electrode of described first protection diode (D7) and the negative electrode of the second protection diode (D8) are connected with the input positive pole of described Switching Power Supply respectively;
Second output of described three phase rectifier filter circuit and direct current input negative pole to be connected with the input negative pole of described Switching Power Supply by described second protection diode group and to be specially:
Second output and the described 3rd of described three phase rectifier filter circuit protects the negative electrode of diode (D9) to be connected;
Described direct current input negative pole and the described 4th protects the negative electrode of diode (D10) to be connected;
The anode of described 3rd protection diode (D9) and the anode of the 4th protection diode (D10) are connected with the input negative pole of described Switching Power Supply respectively.
Second aspect present invention provides a kind of operation method of converter power supply system, comprising:
After converter power supply system connects input power, described input power is powered to power circuit;
Described power circuit is powered to control circuit;
After frequency converter receives operating instruction, the adhesive of electric control circuit control inputs contactor;
When after the adhesive of described input contactor, DC bus powers to described power circuit, and described power circuit powers to described control circuit.
When frequency converter switches to debugging maintenance state or holding state by running status, described electric control circuit controls described input contactor and disconnects.
Alternatively,
Described electric control circuit controls the adhesive of described input contactor or disconnects specifically to comprise: described electric control circuit self transmits control signal and controls the adhesive of described input contactor or disconnection, or described control circuit transmits control signal to electric control circuit thus controls the adhesive of described input contactor or disconnection.
Alternatively,
Frequency converter also comprises the direct current buffer circuit be arranged between rectified three-phase circuit and three-phase inverting circuit, and described direct current buffer circuit comprises the direct current buffer resistance and direct current buffer switch that are connected in parallel;
When after the adhesive of described input contactor, when capacitor charging on described DC bus to capacitance voltage reaches preset value, described control circuit controls described direct current buffer switch and closes, and described DC bus powers to described power circuit, and described power circuit powers to described control circuit.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages: when frequency converter is in debugging maintenance state or holding state, electric control circuit can disconnect by control inputs contactor, make no-voltage on DC bus, and powered to power circuit by input power, power circuit is powered to control circuit, due to no-voltage on now DC bus, therefore avoids electric shock or burns out the risk of electric elements.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.The embodiments described herein should be appreciated that the data used like this can be exchanged in the appropriate case, so that can be implemented with the order except the content except here diagram or description.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Refer to Fig. 1, in the embodiment of the present invention, an embodiment of converter power supply system comprises:
Input power 101, input contactor 102, frequency converter 103 and electric control circuit 104;
Frequency converter 103 specifically comprises: power circuit 1031, control circuit 1032, rectified three-phase circuit 1033 and three-phase inverting circuit 1034;
Wherein input power 101 is connected with power circuit 1031;
Power circuit 1031 is connected with control circuit 1032;
Control circuit 1032 is connected with electric control circuit 104;
Electric control circuit 104 is connected with input contactor 102, and the break-make of control inputs contactor 102;
Input power 101 is connected with rectified three-phase circuit 1033 by input contactor 102;
Rectified three-phase circuit 1033 is connected with three-phase inverting circuit 1034 by DC bus;
DC bus is connected with power circuit 1031.
It should be noted that, in the present embodiment and follow-up embodiment, electric control circuit 104 is connected with input contactor 102, and the break-make of control inputs contactor 102 can be the break-make of electric control circuit 104 self control inputs contactor, also can be send control signal by control circuit 1032 and by the break-make of electric control circuit 104 control inputs contactor, specifically do not limit herein.
In embodiments of the present invention, electric control circuit and input contactor do not belong to a part for frequency converter, it can be the part belonging to electromechanical equipment (such as the building hoist in construction site), this electromechanical equipment can be independent of frequency converter outside equipment, or include the equipment of frequency converter, frequency converter is for driving the motor of electromechanical equipment, and the electric control circuit of electromechanical equipment is connected with the control circuit of frequency converter and can be mutual, repeats no more in subsequent embodiment.
In the present embodiment, when frequency converter is in debugging maintenance state or holding state, electric control circuit can disconnect by control inputs contactor, make no-voltage on DC bus, and powered to power circuit by input power, power circuit is powered to control circuit, due to no-voltage on now DC bus, therefore avoids electric shock or burns out the risk of electric elements.
In actual applications, from the heavy current impact of input power when switching on power to prevent frequency converter, direct current buffer circuit can be increased between rectified three-phase circuit and three-phase inverting circuit, concrete:
Refer to Fig. 2, in the embodiment of the present invention, another embodiment of converter power supply system comprises:
Input power 201, input contactor 202, frequency converter 203 and electric control circuit 204;
Frequency converter 203 specifically comprises: power circuit 2031, control circuit 2032, rectified three-phase circuit 2033, direct current buffer circuit 2034 and three-phase inverting circuit 2035;
Wherein input power 201 is connected with power circuit 2031;
Power circuit 2031 is connected with control circuit 2032;
Control circuit 2032 is connected with electric control circuit 204;
Electric control circuit 204 is connected with input contactor 202, and the break-make of control inputs contactor 202;
Control circuit 2032 is connected with direct current buffer circuit 2034, and controls the break-make of direct current buffer circuit 2034;
Input power 201 is connected with rectified three-phase circuit 2033 by input contactor 202;
Rectified three-phase circuit 2033 is connected with direct current buffer circuit 2034;
Direct current buffer circuit 2034 is connected with three-phase inverting circuit 2035 by DC bus;
DC bus is connected with power circuit 2031.
It should be noted that, direct current buffer circuit 2034 comprises the direct current buffer resistance and direct current buffer switch that are connected in parallel, this direct current buffer switch can be direct current snubber contact device or relay or other switching devices, the break-make that control circuit 2032 controls direct current buffer circuit 2034 can be specifically: when the adhesive of input contactor, when capacitance voltage on frequency changer direct current bus reaches preset value, control circuit 2032 controls the adhesive of direct current buffer switch, or, when frequency converter switches to debugging maintenance state or holding state by running status, control circuit 2032 controls direct current buffer circuit 2034 and disconnects, be understandable that, in actual applications, direct current buffer circuit can also comprise other components and parts, does not specifically limit herein.
In the present embodiment, when frequency converter is in debugging maintenance state or holding state, electric control circuit can disconnect by control inputs contactor, make no-voltage on DC bus, and powered to power circuit by input power, power circuit is powered to control circuit, due to no-voltage on now DC bus, therefore avoids electric shock or burns out the risk of electric elements.
Secondly, in the present embodiment, add direct current buffer circuit, the heavy current impact from input power when connecting input power can being prevented, adding the fail safe of system.
For ease of understanding, be described, please continue to refer to Fig. 2 for the operation principle of converter power supply system to converter power supply system shown in Fig. 2 below:
When after connection input power, input power 201 powers to frequency converter interior power supply circuit 2031, power circuit 2031 powers to control circuit 2032, now frequency converter is in debugging maintenance state or holding state, input contactor 202 and direct current buffer circuit 2034 are in off-state, no-voltage on DC bus.
After frequency converter receives operating instruction, control circuit 2032 is by the adhesive of electric control circuit 204 control inputs contactor 202, make that DC bus has voltage, when the capacitance voltage on DC bus reaches preset value, control circuit 2032 controls the direct current buffer switch adhesive in direct current buffer circuit 2034, and frequency converter normally runs, loaded work piece, now frequency converter is in running status, and is powered to power circuit 2031 by DC bus, and power circuit 2031 powers to control circuit 2032.
When frequency converter switches to debugging maintenance state or holding state by running status, electric control circuit 204 control inputs contactor 202 disconnects, and makes no-voltage on DC bus, now, power to power circuit 2031 by input power 201, power circuit 2031 powers to control circuit 2032.
In actual applications, input power can be three-phase alternating current, can be specifically the three-phase AC380V of electrical network access, frequency converter interior power supply circuit should comprise after three phase rectifier filter circuit carries out three phase rectifier filtering to input power and exporting, and is described below to frequency converter interior power supply circuit:
Refer to Fig. 3, in the embodiment of the present invention, in converter power supply system, an embodiment of frequency converter interior power supply circuit comprises:
Three-phase input end 301, direct current input positive pole 302, direct current input negative pole 303, three phase rectifier filter circuit 304 and Switching Power Supply 305;
Wherein three-phase input end 301 is connected with three phase rectifier filter circuit 304;
First output of three phase rectifier filter circuit 304 is connected with the input positive pole of Switching Power Supply 305;
Second output of three phase rectifier filter circuit 304 is connected with the input negative pole of Switching Power Supply 305;
Direct-flow input end 302 positive pole is connected with the input positive pole of Switching Power Supply 305;
Direct-flow input end negative pole 303 is connected with the input negative pole of Switching Power Supply 305.
It should be noted that, in the present embodiment and follow-up embodiment, power circuit can carry out rectifying and wave-filtering to three-phase alternating current and obtain direct current and power to Switching Power Supply, in actual applications, carry out rectification output owing to only needing the wherein two-phase of getting in three-phase and just can meet the demand of powering to Switching Power Supply, thus when a certain phase phase shortage of three-phase alternating current, power circuit in the present embodiment also can normal power supply, transducer control circuit also can normally be worked when three-phase alternating current phase shortage, such as export control signal or fault-signal, be convenient to carry out debugging maintenance work to frequency converter, frequency converter interior power supply circuit cannot be started when namely solving three-phase alternating current phase shortage in prior art further to power to control circuit, thus cause frequency converter cannot show the problem of fault message.
In the present embodiment, power to Switching Power Supply 305 after the three-phase alternating current that the three phase rectifier filter circuit 304 in power circuit can provide input power carries out three phase rectifier filtering, export after converting operating voltage to by Switching Power Supply 305; The direct current that power circuit also can directly be provided by DC bus is powered to Switching Power Supply by direct current input positive pole 302 and direct current input negative pole 303, export after converting operating voltage to by Switching Power Supply, namely the power circuit of the present embodiment provides two kinds of supply power modes, can be powered by input power, can by DC bus powered.
For ease of the circuit realiration understood and in reality, be described in detail the three phase rectifier filter circuit in power circuit below, refer to Fig. 4, an embodiment of the three phase rectifier filter circuit in power circuit comprises:
First rectifier diode (D1), the second rectifier diode (D2), the 3rd rectifier diode (D3), the 4th rectifier diode (D4), the 5th rectifier diode (D5), the 6th rectifier diode (D6), the first filter capacitor (C1) and the second filter capacitor (C2);
The negative electrode of the first rectifier diode (D1), the negative electrode of the second rectifier diode (D2), the negative electrode of the 3rd rectifier diode (D3) and the first end of the first filter capacitor (C1) are connected with the first output respectively;
The anode of the 4th rectifier diode (D4), the anode of the 5th rectifier diode (D5), the anode of the 6th rectifier diode (D6) and the second end of the second filter capacitor (C2) are connected with the second output respectively;
The anode of the first rectifier diode (D1) is connected with the negative electrode of the 4th rectifier diode (D4), draws first make contact between the first rectifier diode (D1) and the 4th rectifier diode (D4);
The anode of the second rectifier diode (D2) is connected with the negative electrode of the 5th rectifier diode (D5), draws the second contact point between the second rectifier diode (D2) and the 5th rectifier diode (D5);
The anode of the 3rd rectifier diode (D3) is connected with the negative electrode of the 6th rectifier diode (D6), draws the 3rd contact point between the 3rd rectifier diode (D3) and the 6th rectifier diode (D6);
First make contact, the second contact point, the 3rd contact point are connected with one end of three-phase input end respectively;
Second end of the first filter capacitor (C1) is connected with the first end of the second filter capacitor (C2).
In actual applications; in order to improve reliability and the fail safe of power circuit; first can be increased protect diode group at the first output of three phase rectifier filter circuit and between direct current input positive pole and the input positive pole of Switching Power Supply; simultaneously three phase rectifier filter circuit the second output and increase by second between direct current input negative pole and the input negative pole of Switching Power Supply and protect diode group, concrete:
Refer to Fig. 5, another embodiment of the power circuit in the embodiment of the present invention in converter power supply system comprises:
Three-phase input end 501, direct current input positive pole 502, direct current input negative pole 503, three phase rectifier filter circuit 504, first protect diode group 505, second to protect diode group 506 and Switching Power Supply 507;
Wherein three-phase input end 501 is connected with three phase rectifier filter circuit 504;
First output of three phase rectifier filter circuit 504 and direct current input positive pole 502 are connected with the input positive pole of Switching Power Supply 507 by the first protection diode group 505;
Second output of three phase rectifier filter circuit 504 and direct current input negative pole 503 are connected with the input positive pole of Switching Power Supply 507 by the second protection diode group 506;
Wherein the implementation of three phase rectifier filter circuit 504 can be similar to the embodiment shown in Fig. 4, repeats no more herein.
The implementation of a kind of first protection two pipe groups and the second protection diode group is provided below; be understandable that; in actual applications; the implementation of the first protection diode group and the second protection diode group can also have other modes, and implementation provided herein should as limitation of the invention.
Refer to Fig. 6, in the embodiment of the present invention, in converter power supply system, another embodiment of power circuit comprises:
Three-phase input end 601, direct current input positive pole 602, direct current input negative pole 603, three phase rectifier filter circuit 604, first protect diode group 605, second to protect diode group 606 and Switching Power Supply 607;
First protection diode group 605 comprises the first protection diode (D7) and the second protection diode (D8);
Second protection diode group 606 comprises the 3rd protection diode (D9) and the 4th protection diode (D10);
Three-phase input end 601 is connected with three phase rectifier filter circuit 604;
First output of three phase rectifier filter circuit 604 and direct current input positive pole 602 are connected with the input positive pole of Switching Power Supply 607 by the first protection diode group 605;
Second output of three phase rectifier filter circuit 604 and direct current input negative pole 603 are connected with the input positive pole of Switching Power Supply 607 by the second protection diode group 606.
Wherein, the first output of three phase rectifier filter circuit 604 and direct current input positive pole 602 to be connected with the input positive pole of Switching Power Supply 607 by the first protection diode group 605 and to be specially:
First output and second of three phase rectifier filter circuit 604 protects the anode of diode (D8) to be connected;
Direct current input positive pole 602 and first protects the anode of diode (D7) to be connected;
The negative electrode of the first protection diode (D7) and the negative electrode of the second protection diode (D8) are connected with the input positive pole of Switching Power Supply 607 respectively;
Second output of three phase rectifier filter circuit 604 and direct current input negative pole 603 to be connected with the input negative pole of Switching Power Supply 607 by the second protection diode group 606 and to be specially:
Second output and the 3rd of three phase rectifier filter circuit 604 protects the negative electrode of diode (D9) to be connected;
Direct current input negative pole 603 and the 4th protects the negative electrode of diode (D10) to be connected;
The anode of the 3rd protection diode (D9) and the anode of the 4th protection diode (D10) are connected with the input negative pole of Switching Power Supply 607 respectively.
It should be noted that, in the present embodiment, the second protection diode (D8) and the 3rd protection diode (D9) are used for preventing DC bus to the first filter capacitor (C1) and the second filter capacitor (C2) charging; First protection diode (D7) and the 4th protects diode (D10) to damage for preventing from coming from the current direction DC bus of input power the electronic device be connected on DC bus.
In the present embodiment, the specific implementation of three phase rectifier filter circuit 604 can be similar to the embodiment shown in Fig. 4, specifically repeats no more herein.
The circuit structure described in the present embodiment is only an example in practical application, in actual applications, those skilled in the art, according to the circuit diagram shown in Fig. 3 to Fig. 6, can expect that other equivalent electric circuit is to realize the solution of the present invention, does not specifically limit herein completely.
Be described Frequency Converter Control power source method in the embodiment of the present invention below, refer to Fig. 7, in the embodiment of the present invention, an embodiment of the operation method of converter power supply system comprises:
701, input power is powered to power circuit;
In the present embodiment, after converter power supply system connects input power, powered to frequency converter interior power supply circuit by input power.
It should be noted that, the detailed process that input power is powered to frequency converter interior power supply circuit can be: input power is powered to Switching Power Supply after providing three-phase alternating current to carry out rectifying and wave-filtering by the three phase rectifier filter circuit of power circuit, Switching Power Supply exports to other circuit supplies after converting operating voltage to, in actual applications, input power is powered to frequency converter interior power supply circuit also can have other modes, power to Switching Power Supply after such as only providing two-phase alternating current to carry out rectifying and wave-filtering to power circuit, specifically do not limit herein.
702, power circuit is powered to control circuit;
In the present embodiment, input power is powered to control circuit by power circuit after powering to power circuit.
703, frequency converter judges whether to receive operating instruction, if so, then performs step 704;
In the present embodiment, when connection input power, input power is powered to power circuit, and after power circuit is powered to control circuit, frequency converter judges whether to receive operating instruction, if so, in execution step 704.
It should be noted that, in the present embodiment and follow-up embodiment, operating instruction can be specifically from frequency converter equipment of itself, also can be send to frequency converter by other equipment, specifically not limit herein.
704, control circuit is by the adhesive of electric control circuit control inputs contactor;
In the present embodiment, after frequency converter receives operating instruction, control circuit is by the adhesive of electric control circuit control inputs contactor.
It should be noted that, control circuit by the adhesive of electric control circuit control inputs contactor can be specifically: control circuit transmits control signal to electric control circuit, by the adhesive of electric control circuit control inputs contactor, in actual applications, control circuit also can have other modes by the adhesive of electric control circuit control inputs contactor, does not specifically limit herein.
705, DC bus is powered to power circuit, and power circuit is powered to control circuit;
In the present embodiment, when after the adhesive of input contactor, frequency converter is in running status, and DC bus is powered to power circuit, and power circuit is powered to control circuit.
706, frequency converter judges whether to switch to debugging maintenance state or holding state by running status, if so, then performs step 707;
In the present embodiment, after the adhesive of input contactor, frequency converter can judge whether to switch to debugging maintenance state or holding state by running status, if so, then performs step 707.
707, electric control circuit control inputs contactor disconnects.
When frequency converter switches to debugging maintenance state or holding state by running status, electric control circuit control inputs contactor disconnects.
It should be noted that; electric control circuit control inputs contactor disconnects: after electric control circuit receives guard signal; electric control circuit self control inputs contactor disconnects, and also can be to be disconnected by electric control circuit control inputs contactor by control circuit, does not specifically limit herein.
In the present embodiment, when frequency converter is in debugging maintenance state or holding state, can be specifically switch to debugging mode or holding state by running status, also can be just be in debugging mode or holding state after powering on, electric control circuit can disconnect by control inputs contactor, makes no-voltage on DC bus, and powered to power circuit by input power, power circuit is powered to control circuit, due to no-voltage on now DC bus, therefore avoids electric shock or burns out the risk of electric elements.
Secondly, in the present embodiment, when frequency converter is in running status, can be powered to power circuit by DC bus, power circuit is powered to control circuit, namely provides two power supply plans, adds the alternative of system.
In actual applications, between frequency converter rectified three-phase circuit and three-phase inverting circuit, direct current buffer circuit can also be set, for preventing the heavy current impact of input power, concrete:
Refer to Fig. 8, in the embodiment of the present invention, another embodiment of the operation method of converter power supply system comprises:
801, input power is powered to power circuit;
In the present embodiment, after converter power supply system connects input power, powered to frequency converter interior power supply circuit by input power.
It should be noted that, the detailed process that input power is powered to frequency converter interior power supply circuit can be: input power is powered to Switching Power Supply after providing three-phase alternating current to carry out rectifying and wave-filtering by the three phase rectifier filter circuit of power circuit, Switching Power Supply exports to other circuit supplies after converting operating voltage to, in actual applications, input power is powered to frequency converter interior power supply circuit also can have other modes, power to Switching Power Supply after such as only providing two-phase alternating current to carry out rectifying and wave-filtering to power circuit, specifically do not limit herein.
802, power circuit is powered to control circuit;
In the present embodiment, input power is powered to control circuit by power circuit after powering to power circuit.
803, frequency converter judges whether to receive operating instruction, if so, then performs step 804, if not, then performs step 810;
In the present embodiment, when connection input power, input power is powered to power circuit, and after power circuit is powered to control circuit, frequency converter judges whether to receive operating instruction, if so, in execution step 804, if not, then performs step 810.
804, control circuit is by the adhesive of electric control circuit control inputs contactor;
In the present embodiment, after frequency converter receives operating instruction, control circuit is by the adhesive of electric control circuit control inputs contactor.
It should be noted that, control circuit by the adhesive of electric control circuit control inputs contactor can be specifically: control circuit transmits control signal to electric control circuit, by the adhesive of electric control circuit control inputs contactor, in actual applications, control circuit also can have other modes by the adhesive of electric control circuit control inputs contactor, does not specifically limit herein.
805, frequency converter judges whether the capacitance voltage on DC bus meets preset value, if so, then performs step 806, if not, then performs step 810;
After input contactor adhesive, the electric capacity on DC bus starts charging, and frequency converter judges whether the capacitance voltage on DC bus meets preset value, if so, then row step 806, if not, then and execution step 810.
806, control circuit control direct current buffer switch closes;
In the present embodiment, direct current buffer circuit is provided with between frequency converter rectified three-phase circuit and three-phase inverting circuit, this direct current buffer circuit comprises the direct current buffer resistance and direct current buffer switch that are connected in parallel, when the capacitance voltage on frequency changer direct current bus meets preset value, control circuit controls direct current buffer switch and closes, and performs step 807.
807, DC bus is powered to power circuit, and power circuit is powered to control circuit;
In the present embodiment, when after the adhesive of input contactor, frequency converter is in running status, and DC bus is powered to power circuit, and power circuit is powered to control circuit.
808, frequency converter judges whether to switch to debugging maintenance state or holding state by running status, if so, then performs step 809, if not, then performs step 810;
In the present embodiment, after the adhesive of input contactor, frequency converter can judge whether to switch to debugging maintenance state or holding state by running status, if so, then performs step 809, if not, performs step 810.
809, electric control circuit control inputs contactor disconnects.
When frequency converter switches to debugging maintenance state or holding state by running status, electric control circuit control inputs contactor disconnects.
It should be noted that, in the present embodiment, when frequency converter switches to debugging maintenance state or holding state by running status, first can control direct current buffer switch by control circuit to disconnect, disconnected by electric control circuit control inputs contactor again, also can directly be disconnected by electric control circuit control inputs contactor, thus force to disconnect direct current buffer switch, with ensure frequency converter upper once power on or receive once operating instruction before, direct current buffer switch is in off-state.
810, frequency converter performs other operations;
In the present embodiment, when not meeting Rule of judgment, frequency converter performs other operations, such as, keep existing current on off state or power supply state, specifically do not limit herein.
It should be noted that; electric control circuit control inputs contactor disconnects: after electric control circuit receives guard signal; electric control circuit self control inputs contactor disconnects, and also can be to be disconnected by electric control circuit control inputs contactor by control circuit, does not specifically limit herein.
In the present embodiment, when frequency converter is in debugging maintenance state or holding state, can be specifically switch to debugging mode or holding state by running status, also can be just be in debugging mode or holding state after powering on, electric control circuit can disconnect by control inputs contactor, makes no-voltage on DC bus, and powered to power circuit by input power, power circuit is powered to control circuit, due to no-voltage on now DC bus, therefore avoids electric shock or burns out the risk of electric elements.
Secondly, in the present embodiment, when frequency converter is in running status, can be powered to power circuit by DC bus, power circuit is powered to control circuit, namely provides two power supply plans, adds the reliability of system.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Accompanying drawing explanation
Fig. 1 is the first schematic diagram of converter power supply system in the embodiment of the present invention;
Fig. 2 is the second schematic diagram of converter power supply system in the embodiment of the present invention;
Fig. 3 is the 3rd schematic diagram of converter power supply system in the embodiment of the present invention;
Fig. 4 is the 4th schematic diagram of converter power supply system in the embodiment of the present invention;
Fig. 5 is the 5th schematic diagram of converter power supply system in the embodiment of the present invention;
Fig. 6 is the 6th schematic diagram of converter power supply system in the embodiment of the present invention;
Fig. 7 is an embodiment flow chart of the operation method of converter power supply system in the embodiment of the present invention;
Fig. 8 is another embodiment flow chart of the operation method of converter power supply system in the embodiment of the present invention.
Embodiment
Embodiments providing a kind of Frequency Converter Control power source method, when the frequency conversion for solving band electric control circuit is in debugging maintenance state or holding state, DC bus having the problem of voltage.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Claims (10)
1. a converter power supply system, is characterized in that, comprising:
Input power, electric control circuit, input contactor and frequency converter, described frequency converter comprises power circuit, control circuit, rectified three-phase circuit and three-phase inverting circuit;
Described input power is connected with described power circuit;
Described power circuit is connected with described control circuit;
Described control circuit is connected with described electric control circuit;
Described electric control circuit is connected with described input contactor, and controls the break-make of described input contactor;
Described input power is connected with described rectified three-phase circuit by described input contactor;
Described rectified three-phase circuit is connected with described three-phase inverting circuit by DC bus;
Described DC bus is connected with described power circuit.
2. converter power supply system according to claim 1, is characterized in that, frequency converter also comprises direct current buffer circuit;
Described control circuit is connected with described direct current buffer circuit, and controls the break-make of described direct current buffer circuit;
Described rectified three-phase circuit is connected with described direct current buffer circuit;
Described direct current buffer circuit is connected with described three-phase inverting circuit by DC bus;
Described direct current buffer circuit comprises direct current buffer resistance and direct current buffer switch;
Described direct current buffer resistance and described direct current buffer switch are connected in parallel.
3. converter power supply system according to claim 1 and 2, is characterized in that, described input power is three-phase alternating current.
4. converter power supply system according to claim 3, is characterized in that, described power circuit comprises:
Three-phase input end, direct current input positive pole, direct current input negative pole, three phase rectifier filter circuit and Switching Power Supply;
Described three-phase input end is connected with described three phase rectifier filter circuit;
First output of described three phase rectifier filter circuit is connected with the input positive pole of described Switching Power Supply;
Second output of described three phase rectifier filter circuit is connected with the input negative pole of described Switching Power Supply;
Described direct current input positive pole is connected with the input positive pole of described Switching Power Supply;
Described direct current input negative pole is connected with the input negative pole of described Switching Power Supply.
5. converter power supply system according to claim 4, it is characterized in that, described three phase rectifier filter circuit comprises the first rectifier diode (D1), the second rectifier diode (D2), the 3rd rectifier diode (D3), the 4th rectifier diode (D4), the 5th rectifier diode (D5), the 6th rectifier diode (D6), the first filter capacitor (C1) and the second filter capacitor (C2);
The negative electrode of described first rectifier diode (D1), the negative electrode of the second rectifier diode (D2), the negative electrode of the 3rd rectifier diode (D3) and the first end of the first filter capacitor (C1) are connected with described first output respectively;
The anode of described 4th rectifier diode (D4), the anode of the 5th rectifier diode (D5), the anode of the 6th rectifier diode (D6) and the second end of the second filter capacitor (C2) are connected with described second output respectively;
The anode of described first rectifier diode (D1) is connected with the negative electrode of described 4th rectifier diode (D4), draws first make contact between described first rectifier diode (D1) and described 4th rectifier diode (D4);
The anode of described second rectifier diode (D2) is connected with the negative electrode of described 5th rectifier diode (D5), draws the second contact point between described second rectifier diode (D2) and described 5th rectifier diode (D5);
The anode of described 3rd rectifier diode (D3) is connected with the negative electrode of described 6th rectifier diode (D6), draws the 3rd contact point between described 3rd rectifier diode (D3) and described 6th rectifier diode (D6);
Described first make contact, the second contact point, the 3rd contact point are connected with one end of described three-phase input end respectively;
Second end of described first filter capacitor (C1) is connected with the first end of described second filter capacitor (C2).
6. converter power supply system according to claim 5, is characterized in that, described power circuit also comprises the first protection diode group and the second protection diode group;
First output of described three phase rectifier filter circuit and direct current input positive pole are connected with the input positive pole of described Switching Power Supply by described first protection diode group;
Second output of described three phase rectifier filter circuit and direct current input negative pole are connected with the input negative pole of described Switching Power Supply by described second protection diode group.
7. converter power supply system according to claim 6, is characterized in that, described first protection diode group comprises the first protection diode (D7) and the second protection diode (D8);
Described second protection diode group comprises the 3rd protection diode (D9) and the 4th protection diode (D10);
First output of described three phase rectifier filter circuit and direct current input positive pole to be connected with the input positive pole of described Switching Power Supply by described first protection diode group and to be specially:
First output and described second of described three phase rectifier filter circuit protects the anode of diode (D8) to be connected;
Described direct current input positive pole and described first protects the anode of diode (D7) to be connected;
The negative electrode of described first protection diode (D7) and the negative electrode of the second protection diode (D8) are connected with the input positive pole of described Switching Power Supply respectively;
Second output of described three phase rectifier filter circuit and direct current input negative pole to be connected with the input negative pole of described Switching Power Supply by described second protection diode group and to be specially:
Second output and the described 3rd of described three phase rectifier filter circuit protects the negative electrode of diode (D9) to be connected;
Described direct current input negative pole and the described 4th protects the negative electrode of diode (D10) to be connected;
The anode of described 3rd protection diode (D9) and the anode of the 4th protection diode (D10) are connected with the input negative pole of described Switching Power Supply respectively.
8. an operation method for converter power supply system, is characterized in that, described method is based on the converter power supply system described in any one of claim 1 to 7, and described method comprises:
After converter power supply system connects input power, described input power is powered to power circuit;
Described power circuit is powered to control circuit;
After frequency converter receives operating instruction, the adhesive of electric control circuit control inputs contactor;
When after the adhesive of described input contactor, DC bus powers to described power circuit, and described power circuit powers to described control circuit.
When frequency converter switches to debugging maintenance state or holding state by running status, described electric control circuit controls described input contactor and disconnects.
9. Frequency Converter Control power source method according to claim 8, it is characterized in that, described electric control circuit controls the adhesive of described input contactor or disconnects specifically to comprise: described electric control circuit self transmits control signal and controls the adhesive of described input contactor or disconnection, or described control circuit transmits control signal to electric control circuit thus controls the adhesive of described input contactor or disconnection.
10. Frequency Converter Control power source method according to claim 8, it is characterized in that, frequency converter also comprises the direct current buffer circuit be arranged between rectified three-phase circuit and three-phase inverting circuit, and described direct current buffer circuit comprises the direct current buffer resistance and direct current buffer switch that are connected in parallel;
When after the adhesive of described input contactor, when capacitor charging on described DC bus to capacitance voltage reaches preset value, described control circuit controls described direct current buffer switch and closes, and described DC bus powers to described power circuit, and described power circuit powers to described control circuit.
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| CN201510027944.2A CN104506047A (en) | 2015-01-20 | 2015-01-20 | Operation method of inverter power supply system and inverter power supply system |
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| CN201510027944.2A CN104506047A (en) | 2015-01-20 | 2015-01-20 | Operation method of inverter power supply system and inverter power supply system |
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| CN112216555A (en) * | 2020-08-24 | 2021-01-12 | 神华新能源有限责任公司 | Relay protection circuit, relay protection device and wind power generation system |
| CN112968596A (en) * | 2021-02-24 | 2021-06-15 | 广东美的暖通设备有限公司 | Frequency converter and control method of contactor thereof |
| CN113224996A (en) * | 2021-06-22 | 2021-08-06 | 天地上海采掘装备科技有限公司 | Coal mining machine traction loop control circuit and control method |
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