CN202602542U - Wide-range voltage-stabilized and frequency-stabilized power supply - Google Patents
Wide-range voltage-stabilized and frequency-stabilized power supply Download PDFInfo
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- CN202602542U CN202602542U CN 201120438673 CN201120438673U CN202602542U CN 202602542 U CN202602542 U CN 202602542U CN 201120438673 CN201120438673 CN 201120438673 CN 201120438673 U CN201120438673 U CN 201120438673U CN 202602542 U CN202602542 U CN 202602542U
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Abstract
The utility model relates to an inverter power supply, and specifically relates to a wide-range voltage-stabilized and frequency-stabilized power supply. The power supply comprises a direct-current bus output port and a transformer, and is characterized by comprising a main circuit and a control circuit. The main circuit consists of a PWM rectification circuit and an inverter circuit. The control circuit includes a control module, an auxiliary interface module, an output feedback module, an input current detection module, a display/button module and a relay module. A PWM rectification module, an inverter module, the auxiliary interface module, the output feedback module, the input current detection module, the display/button module and the relay module are connected to the control module through multi-core screening cables respectively. As the above structure is adopted by the invention, when a tyre crane is in light load, a diesel generator set runs at idle; and when the tyre crane is in heavy load, the diesel generator set runs at a rated rotor speed, so that one tyre crane can finish one day work with 50% of fuel oil saved, thereby reducing emission and pollution.
Description
[0001] technical field
The present invention relates to a kind of inverter, the wide region constant voltage and constant frequency that specifically a kind of giant tire that is used for the harbour container harbour hangs on.
Background technology
It is by diesel generating set 11 electrical source of power (as shown in Figure 1) to be provided that the giant tire that the container terminal is used hangs; Supply lifting motor 12, movable motor 13, control system 14, air-conditioning equipment 15, lighting apparatus 16 and 17 electricity consumptions of other servicing units; The power of unit is generally at 200～500kW; Equipment was worked 8 to 14 hours every day, and the electricity consumption situation that this tyre during hangs is most be light-load state (servicing unit 17 electricity consumptions such as control system 14, air-conditioning equipment 15, lighting apparatus 16), full load operations (hanging container) in short-term; And diesel generating set 11 moves under rated speed always; Its fuel consumption is very big, has caused very big waste of fuel for this reason, and has also increased environmental pollution.
If can make tyre crane when underloading, diesel generating set is idle; Under heavy load, diesel generating set moves in rated speed, and then a tyre crane is accomplished darg equally, can save fuel oil 50%.
Therefore, need a kind of constant voltage and constant frequency, 220/380V, 50/60Hz power supply are provided, power supply capacity 40kVA under the various operating modes of diesel generating set, can both for the servicing units such as control system, air-conditioning, illumination of tyre crane.
Through retrieval; CN201614238U discloses the patent of invention that a kind of energy-saving tire hangs the voltage automatic regulating apparatus on the net; It comprises civil power AC network input port, supplies each mechanism's frequency converter machine auxiliary equipment frequency converter of crane with dc bus output port, major loop, control loop, accessory power supply module; The right flat ripple unit of said major loop, transfer switch, main power source rectification/inversion unit are formed, and said control loop is made up of sample circuit, control module and display alarm, when tyre crane institute hoisting thing descends; When the main frequency converter that hoists is in generating state; It can be reverse into alternating current with the electric energy that the main frequency converter that hoists sends, feedback telegram in reply net, or supply self or supply other tyre cranes to use; Its deficiency is: its voltage stabilization and frequency stabilization is limited in scope, can only be under the situation of change in voltage scope 100V, frequency range 10 Hz reliably working.Tyre crane lifting during container because the motor load sudden change; The having very serious voltge surge and fall of generating set, general power supply be difficult to adapt to this harsh conditions, can cause the computer system power-off restoration on the tyre crane usually; Light also can flickering, even damages light units.
In addition, what the control circuit of product great majority adopted is that analog circuit or half module are intended half word circuit, and control precision is poor, and stability and poor reliability can not adapt to the use needs under the hot and humid mal-condition in harbour.
Summary of the invention
The objective of the invention is to solve the deficiency of above-mentioned prior art, the wide region constant voltage and constant frequency that a kind of control precision height, the stable height of voltage stabilization and frequency stabilization are provided, can under adverse circumstances, use.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of wide region constant voltage and constant frequency comprises dc bus output port and transformer, it is characterized in that comprising main circuit and control circuit, wherein:
Said main circuit is made up of PWM boost rectifying circuit and inverter circuit; The PWM rectification module that the PWM boost rectifying circuit is made up of energy storage inductor, IGBT module M1-M3 and dc filter capacitor adopts AC-DC Three-Phase PWM Rectifier topological structure, makes in input voltage 220～480VAC, incoming frequency 25～60 Hz scopes; The 750V direct voltage that rectification output is stable; The inversion module that inverter circuit is made up of IGBT module M4-M6 and LC filter adopts DC-AC three-phase three leg inverter topological structures, the 750V direct voltage is converted into pulse duration is adjustable, fundamental frequency is the three-phase alternating-current supply of 60Hz; Behind the LC filter; The output total harmonic distortion is isolated for guaranteeing the electricity between the input and output less than 5% 50/60Hz 220/380 three phase mains, reduces to influence each other; Make output voltage adapt to various electric pressures by transformer
Said control circuit comprises control module, satellite interface module, output feedback module, input current detection module, display/key-press module, relay module, and control module is made up of digital signal processor (DSP), analog quantity is changed into digital quantity handle; Make system's control more stable, accurate, simultaneously, DSP accomplishes regulation and control, monitoring and the diagnosis to inner and external status; Have perfect defencive function and fault self-diagnosis function, after system's energized, be under the normal operating condition; Digital signal processor module operation self-check program; Check all built-in functions, the satellite interface module is accomplished the signal sampling of three-phase input voltage and direct voltage, is controlled output contactor, soft start control and the cooling fan operation of power supply respectively by control interface; The input current detection module is accomplished the signal sampling of three-phase input current; And the detection input short current, the output feedback module is accomplished the signal sampling of three-phase output current and is accomplished the signal sampling of voltage through the output voltage detection module, and detects input short current; The output feedback module is accomplished the signal sampling of three-phase output current and voltage; And the detection input short current, parameter setting, operational factor that display/key-press module is accomplished power supply show and running status
Said PWM rectification module, inversion module, satellite interface module, output feedback module, input current detection module, power module, display/key-press module and relay module; Be connected to control module through shielded multiconductor cable respectively, to reach the effect of between control module and power component, carrying out electricity isolation, parameter sampling conversion, drive controlling and overcurrent protection.
PWM rectifier among the present invention can adopt the direct current power control strategy; To realize the operation of grid side unity power factor; The PWM rectifier of input can guarantee that this power supply works under input voltage wide fluctuations situation; And realize that input power factor is approximately 1, suppress harmonic pollution, because the very big (220V ~ 480V) of the change range of input voltage of wide region constant voltage and constant frequency; Therefore instantaneous input voltage even can reach 530V requires power supply front end PWM rectifier to have very high voltage utilization.
Power module control system among the present invention adopts SV-PWM (space vector pulse width modulation) technology, makes power supply have fabulous dynamic characteristic and low distortion, and algorithm simply is convenient to realize digitlization, the direct voltage utilance is high, switching loss is low.
Dc bus output port among the present invention is the laminated bus structure that is made up of staggered copper bar and insulating barrier; Positive and negative electrode is in the two sides of insulating barrier; Dc bus is connected with inversion module through copper bar; This structure has played the effect that absorbs electric capacity, has reduced the stray inductance in the loop of power circuit, guarantees the IGBT reliably working.
Transformer among the present invention can make electricity isolation between the input and output, reduces to influence each other, and makes output voltage adapt to the various electric pressures (three-phase and four-line) of customer requirements.
The present invention makes tyre crane when underloading owing to adopt said structure, and diesel generating set is idle; Under heavy load, diesel generating set moves in rated speed, and then a tyre crane is accomplished darg equally, can save fuel oil 50%, and reduces discharging and pollution.
Description of drawings
Fig. 1 is the electric power system and the load configuration sketch map of prior art.
Fig. 2 is electric power system of the present invention and load configuration sketch map.
Fig. 3 is main circuit topology figure of the present invention.
Fig. 4 is a schematic block circuit diagram of the present invention.
Reference numeral: control module 1; Satellite interface module 2; Output feedback module 3; Input current detection module 4; Display/key-press module 5; Relay module 6; PWM boost rectifying circuit 7; Inverter circuit 8; Filter 9; Transformer 10; Diesel generating set 11; Lifting motor 12; Movable motor 13; Control system 14; Air-conditioning equipment 15; Lighting apparatus 16; Servicing unit 17; Dc bus 18; Main circuit 19; Control circuit 20; Power module 21; Guidance panel 22; Output voltage detection module 23.
Embodiment
Below in conjunction with accompanying drawing the present invention is further specified:
A kind of wide region constant voltage and constant frequency comprises dc bus 18 output ports and transformer, it is characterized in that comprising main circuit 19 and control circuit 20, wherein:
Main circuit is made up of PWM boost rectifying circuit 7 and inverter circuit 8; The PWM rectification module that PWM boost rectifying circuit 7 is made up of energy storage inductor, IGBT module M1-M3 and dc filter capacitor adopts AC-DC Three-Phase PWM Rectifier topological structure, makes in input voltage 220～480VAC, incoming frequency 25～60 Hz scopes; The 750V direct voltage that rectification output is stable; The inversion module that inverter circuit 8 is made up of IGBT module M4-M6 and LC filter adopts DC-AC three-phase three leg inverter topological structures, the 750V direct voltage is converted into pulse duration is adjustable, fundamental frequency is the three-phase alternating-current supply of 60Hz; Behind LC filter 9; The output total harmonic distortion is isolated for guaranteeing the electricity between the input and output less than 5% 50/60Hz 220/380 three phase mains, reduces to influence each other; Make output voltage adapt to various electric pressures by transformer 10
Control circuit comprises control module 1, satellite interface module 2, output feedback module 3, input current detection module 4, display/key-press module 5, relay module 6, and control module 1 is made up of digital signal processor (DSP), analog quantity is changed into digital quantity handle; Make system's control more stable, accurate, simultaneously, DSP accomplishes regulation and control, monitoring and the diagnosis to inner and external status; Have perfect defencive function and fault self-diagnosis function, after system's energized, be under the normal operating condition; Digital signal processor module operation self-check program; Check all built-in functions, satellite interface module 2 is accomplished the signal sampling of three-phase input voltage and direct voltage, is controlled output contactor, soft start control and the cooling fan operation of power module 21 respectively by control interface; Input current detection module 4 is accomplished the signal sampling of three-phase input current; And the detection input short current, output feedback module 3 is accomplished the signal sampling of three-phase output current and is accomplished the signal sampling of voltage through output voltage detection module 23, and detects input short current; Parameter setting, operational factor that display/key-press module 5 is accomplished power supply show and running status
PWM rectification module, inversion module 8, satellite interface module 2, output feedback module 3, input current detection module 4, power module 21, display/key-press module 5 and relay module 6 are connected to control module 1 through shielded multiconductor cable respectively, to reach the effect of between control module 1 and power component, carrying out electricity isolation, parameter sampling conversion, drive controlling and overcurrent protection.
PWM rectifier among the present invention can adopt the direct current power control strategy; To realize the operation of grid side unity power factor; The PWM rectifier of input can guarantee that this power supply works under input voltage wide fluctuations situation; And realize that input power factor is approximately 1, suppress harmonic pollution, because the very big (220V ~ 480V) of the change range of input voltage of wide region constant voltage and constant frequency; Therefore instantaneous input voltage even can reach 530V requires power supply front end PWM rectifier to have very high voltage utilization.
Power module 21 control system among the present invention adopt SV-PWM (space vector pulse width modulation) technology, make power supply have fabulous dynamic characteristic and low distortion, and algorithm simply is convenient to realize digitlization, the direct voltage utilance is high, switching loss is low.
Dc bus output port among the present invention is the laminated bus structure that is made up of staggered copper bar and insulating barrier; Positive and negative electrode is in the two sides of insulating barrier; Dc bus is connected with inversion module through copper bar; This structure has played the effect that absorbs electric capacity, has reduced the stray inductance in the loop of power circuit, guarantees the IGBT reliably working.
Transformer 10 among the present invention can make electricity isolation between the input and output, reduces to influence each other, and makes output voltage adapt to the various electric pressures (three-phase and four-line) of customer requirements.
The main circuit topological structure of power supply such as Fig. 2 among the present invention; The IGBT module (M1-M3) of three input energy storage inductors (L1-L3), three Unit two and dc filter capacitor (C1) are formed three phase full bridge PWM boost rectifying circuit; Make in input voltage 220～480VAC, incoming frequency 25～60 Hz scopes; The 750V direct voltage that rectification output is stable, dc bus adopts stacked copper bar directly to be connected with inversion module 8, and this bus structure adopts staggered copper bar and insulating barrier to constitute laminated bus structure; Positive and negative electrode is in the two sides of insulating barrier; This structure has played the effect that absorbs electric capacity, has reduced the stray inductance in the loop of power circuit, guarantees the IGBT reliably working; The IGBT module (M4-M6) of three two unit and LC filter (L3-L6, C2-C4) are formed the three phase full bridge inverter circuit; Convert the 750V direct voltage into 50/60Hz 380V three phase mains; Transformer (T1) makes electricity isolation between the input and output; Reduce to influence each other, make output voltage adapt to the various electric pressures (three-phase and four-line) (as: exporting 2 groups of 50Hz/60Hz 220/380V and 110/190V three phase worker power) of customer requirements.
The schematic block circuit diagram of power supply is seen Fig. 3; (220～480VAC, 25～60Hz) power supplys are input to power supply PWM rectification module through fuse, input filter, Soft Start Switch to three-phase alternating current, and input filter protection power supply is not imported the power supply transient changing to be influenced.The PWM rectification module carries out the AC-DC conversion under various input states, export stable 750V direct voltage, and the PWM rectification can make the electric current of input side for sinusoidal; Power factor is near 1; Can suppress harmonic pollution, through the direct-current power supply inverter 10 after the filtering 9, DC-AC inversion module output pulse width is adjustable, fundamental frequency is the three-phase alternating-current supply of 50Hz/60Hz; Through output filter 9 and output transformer 10; Export 2 groups of 50Hz/60Hz 220/380V and 110/190V three phase worker power (three-phase and four-line), PWM rectification module and inversion module use the IGBT power device, and power control system adopts SV-PWM (space vector pulse width modulation) technology; Make power supply have fabulous dynamic characteristic and low distortion, and algorithm simply is convenient to realize digitlization, the direct voltage utilance is high, switching loss is low.
Control module 1 is through guidance panel 22 controls; After guidance panel 22 operating system energized, (220～480V, 25～60Hz) power supplys are input to power supply PWM rectification module through fuse, input filter, Soft Start Switch to three-phase alternating current, are under the normal operating condition; Processor module operation self-check program; All built-in functions of inspection tyre crane electricity consumption are according to the operation conditions regulation and control constant voltage and constant frequency of tyre crane
The operation conditions of tyre crane has following situation:
Tyre crane is when underloading, and diesel generating set 11 is idle, and generating set 11 output voltages are lower than 300V, frequency is lower than 30Hz;
When tyre crane during in load, diesel generating set 11 high-speed cruisings, generating set 11 output voltage 480V, frequency are lower than 50/60Hz;
When tyre crane in idling and high-speed transitions, generating set 11 output voltages are at 220～480V, frequency changes between 25～60Hz, about 3 ~ 10 seconds of time.
Under the above operation conditions; The voltage and the frequency range that are input to the three-phase alternating current of constant voltage and constant frequency alter a great deal; Control circuit is through control PWM rectification; Make the direct voltage of PWM rectification module output can both be stabilized in 750V, this DC power supply is supplied with inverter through after the filtering, and DC-AC inversion module output pulse width is adjustable, fundamental frequency is the three-phase alternating-current supply of 50Hz/60Hz; Through output filter 9 and output transformer 10, export 2 groups of 50Hz/60Hz 220/380V and 110/190V three phase worker power (three-phase and four-line).
The present invention is owing to adopt said structure; Make diesel generating set stable power is provided under various operating modes, can both for servicing units such as the control system of tyre crane, air-conditioning, illumination; A tyre crane is accomplished darg equally; Compared with prior art, fuel oil 50% be can save, discharging and pollution reduced.
Claims (2)
1. a wide region constant voltage and constant frequency comprises dc bus output port and transformer, it is characterized in that comprising main circuit and control circuit, wherein:
Main circuit is made up of PWM boost rectifying circuit and inverter circuit; The PWM rectification module that the PWM boost rectifying circuit is made up of energy storage inductor, IGBT module M1-M3 and dc filter capacitor; Adopt AC-DC Three-Phase PWM Rectifier topological structure, make in input voltage 220～480VAC, incoming frequency 25～60 Hz scopes, the 750V direct voltage that rectification output is stable; The inversion module that inverter circuit is made up of IGBT module M4-M6 and LC filter; Adopt DC-AC three-phase three leg inverter topological structures, the 750V direct voltage is converted into pulse duration is adjustable, fundamental frequency is the three-phase alternating-current supply of 60Hz, behind the LC filter; The output total harmonic distortion is less than 5% 50/60Hz 220/380 three phase mains
Control circuit comprises control module, satellite interface module, output feedback module, input current detection module, display/key-press module, relay module; Control module is made up of digital signal processor DSP; The satellite interface module is accomplished the signal sampling of three-phase input voltage and direct voltage; Output contactor, soft start control and the cooling fan of being controlled power supply by control interface respectively move, and the input current detection module is accomplished the signal sampling of three-phase input current, and detects input short current; The signal sampling that the output feedback module is accomplished the signal sampling of three-phase output current and accomplished voltage through the output voltage detection module; And the detection input short current, the output feedback module is accomplished the signal sampling of three-phase output current and voltage, and detects input short current; Parameter setting, operational factor that display/key-press module is accomplished power supply show and running status
PWM rectification module, inversion module, satellite interface module, output feedback module, input current detection module, power module, display/key-press module and relay module are connected to control module through shielded multiconductor cable respectively.
2. a kind of wide region constant voltage and constant frequency according to claim 1; It is characterized in that the dc bus output port is the laminated bus structure that is made up of staggered copper bar and insulating barrier; Positive and negative electrode is in the two sides of insulating barrier, and dc bus is connected with inversion module through copper bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120438673 CN202602542U (en) | 2011-11-08 | 2011-11-08 | Wide-range voltage-stabilized and frequency-stabilized power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120438673 CN202602542U (en) | 2011-11-08 | 2011-11-08 | Wide-range voltage-stabilized and frequency-stabilized power supply |
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| CN202602542U true CN202602542U (en) | 2012-12-12 |
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| CN 201120438673 Expired - Lifetime CN202602542U (en) | 2011-11-08 | 2011-11-08 | Wide-range voltage-stabilized and frequency-stabilized power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412733A (en) * | 2011-11-08 | 2012-04-11 | 威海广泰空港电源设备有限公司 | Voltage-stabilizing and frequency-stabilizing power supply with wide range |
| IT201700039411A1 (en) * | 2017-04-10 | 2018-10-10 | Carel Ind Spa | REFRIGERATING MACHINE WITH COMPRESSOR OPERATED BY ASYNCHRONOUS MOTOR WITH FIXED SPEED AND OPERATING DEVICE FOR AN ASYNCHRONOUS ELECTRIC MOTOR |
-
2011
- 2011-11-08 CN CN 201120438673 patent/CN202602542U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412733A (en) * | 2011-11-08 | 2012-04-11 | 威海广泰空港电源设备有限公司 | Voltage-stabilizing and frequency-stabilizing power supply with wide range |
| IT201700039411A1 (en) * | 2017-04-10 | 2018-10-10 | Carel Ind Spa | REFRIGERATING MACHINE WITH COMPRESSOR OPERATED BY ASYNCHRONOUS MOTOR WITH FIXED SPEED AND OPERATING DEVICE FOR AN ASYNCHRONOUS ELECTRIC MOTOR |
| WO2018189760A1 (en) * | 2017-04-10 | 2018-10-18 | Carel Industries S.p.A. | Refrigerating machine with compressor operated by fixed speed asynchronous motor and operating device for an asynchronous electric motor |
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