CN202906780U - General experimental device based on Z-source inverter - Google Patents
General experimental device based on Z-source inverter Download PDFInfo
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- CN202906780U CN202906780U CN 201220547494 CN201220547494U CN202906780U CN 202906780 U CN202906780 U CN 202906780U CN 201220547494 CN201220547494 CN 201220547494 CN 201220547494 U CN201220547494 U CN 201220547494U CN 202906780 U CN202906780 U CN 202906780U
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Abstract
The utility model discloses a general experimental device based on a Z-source inverter, characterized by comprising a power circuit module, a signal circuit module, a DSP control module, an IGBT driving module and an upper computer module. The power circuit module is connected with the signal circuit module, the signal circuit module is connected with the DSP control module, and the DSP control module is connected with the IGBT driving module; the DSP control module is connected with an upper computer, and the IGBT driving module is connected with the power circuit module. Compared with the prior art, the utility model has the following advantages and effects that the general experimental device based on the Z-source inverter is suitable for various application occasions based on the Z-source inverter, such as photovoltaic grid-connected power generation, AC motor speed regulation, uninterrupted power supply UPS, etc., and fully considers the versatility requirement of the general experimental device based on the Z-source inverter under various application occasions; By taking the experimental device as the basis, developers can carry out the control algorithm research and secondary development based on the Z-source inverter more rapidly, the development cycle is shortened and the scientific research work efficiency is improved, at the same time, the Z-source inverter theory intensive research and popularization application are advantageous.
Description
Technical field
The utility model relates to a kind of experimental provision of electronic power inversion technical field, specifically a kind of general experimental provision based on Z-source inverter.
Background technology
Inversion transformation technique can be converted to the electric energy of direct current form the electric energy of form of communication, thereby carries out the occasion that the DC-AC of electric energy changes at needs, such as fields such as speed regualtion of AC motor and parallel network power generations, is widely used.Inverter at present commonly used adopts the topological structure of two level single-phase full bridges or three phase full bridge, and simultaneously, in order to satisfy full-bridge topology for the requirement of its dc voltage, system has also often comprised one-level DC converting link.In recent years, scholar FangZ.Peng points out the defective that this kind inversion topological exists at aspects such as reliability, efficient, the qualities of power supply, and has proposed a kind of novel reverse variable topological structure based on passive Z net in its paper " Z-SourceInverter ".
Denomination of invention is: " based on the three-phase photovoltaic grid-connected system of novel Z-source inverter ", application number is: 201210136944.2 Chinese invention patent application discloses a kind of three-phase photovoltaic grid-connected system based on novel Z-source inverter, it is characterized in that: solar panel connects respectively first input end and the MPPT control unit of Z-source inverter, the output of Z-source inverter connects the input of LC filter circuit, and the latter's output connects respectively the first input end of electrical network, Hall voltage transducer and the first input end of Hall current sensor; The first output of electrical network connects the second input of Hall current sensor, and its second output connects the second input of Hall voltage transducer; The output connection data processing unit of Hall current sensor, Hall voltage transducer and temperature, humidity data acquisition module; The a pair of input/output terminal of DSP control module connects the MPPT control unit, and another is to input/output terminal connection data processing unit, and another road output of DSP control module is connected in series the second input of pwm signal drive circuit and Z-source inverter.This patent function singleness can not realize the function of single-phase grid-connected and speed regualtion of AC motor, can not be as the quick development platform based on the Z source structure.
The utility model content
The purpose of this utility model is to overcome above shortcomings in the prior art, and provide a kind of reasonable in design, satisfy the experimental study based on the multiple application of Z-source inverter, such as speed regualtion of AC motor, parallel network power generation and uninterrupted power supply etc., carry out based on the secondary development of Z-source inverter more rapidly and easily based on the general experimental provision of Z-source inverter so that install by experiment at this.
The technical scheme in the invention for solving the above technical problem is: should be based on the general experimental provision of Z-source inverter, it is characterized in that: comprise that power circuit module, signal circuit module, DSP control module, IGBT driver module and upper computer module, power circuit module are connected with the signal circuit module, the signal circuit module is connected with the DSP control module, the DSP control module is connected with the IGBT driver module, the DSP control module is connected with host computer, and the IGBT driver module is connected with the power circuit module.Power circuit module carrying direct current energy is to the energy flow of AC energy conversion process, the power circuit module is connected with the signal circuit module to transmit forceful electric power to voltage, the current information of light current, the signal circuit module is connected to transmit the information of voltage of sampling and catching with the DSP control module, the DSP control module is connected to transmit PWM with the IGBT driver module and drives signal, the DSP control module is connected to transmit control and work information with host computer, the IGBT driver module is connected to transmit the driving signal with the power circuit module.
As preferably, signal circuit module described in the utility model comprises: the Hall sample circuit, voltage zero-crossing detection circuit and reference voltage circuit, voltage zero-crossing detection circuit, reference voltage circuit is connected with the Hall sample circuit, the Hall sample circuit comprises the Hall voltage sample circuit, Hall current sample circuit and booster circuit, the Hall voltage sample circuit, the Hall current sample circuit is converted to the forceful electric power voltage and current signal that carries in the power circuit respectively and is fit to the voltage signal that the DSP module gathers, voltage zero-crossing detection circuit will obtain the voltage signal that the AC voltage signal is converted to reflection AC voltage-phase from the Hall voltage sample circuit, reference voltage circuit is connected with booster circuit and promotes ac voltage signal to be sampled, and reference voltage circuit is connected the transmission reference voltage signal with the DSP module.
As preferably, power circuit module described in the utility model comprises: direct-flow input end, Z source impedance network, three phase full bridge circuit and exchange output interface, direct-flow input end is connected with the Z source impedance network, the Z source impedance network is connected with the three phase full bridge circuit, and the three phase full bridge circuit is connected with the interchange output interface.Direct-flow input end is connected to transmit direct current energy with the Z source impedance network, and direct-flow input end is connected with the transmission voltage current signal with the signal circuit module; The Z source impedance network is connected to transmit direct current energy with the three phase full bridge circuit, and the Z source impedance network is connected with the transmission voltage current signal with the signal circuit module; The three phase full bridge circuit is connected to transmit AC energy with the interchange output interface; The electric current output interface is connected with the transmission voltage current signal with the signal circuit module.
As preferably, upper computer module described in the utility model comprises Programmable Logic Controller and touch-screen, and Programmable Logic Controller connects the DSP control module by modular converter, and touch-screen is connected with Programmable Logic Controller through communication cable.Upper computer module is mainly finished whole experimental system data acquisition and condition monitoring, Programmable Logic Controller obtains power circuit operation information and the transfer instruction signal that the DSP module collects through communication cable, touch-screen can reflect system's operation information, and input instruction signal.
As preferably, direct-flow input end described in the utility model comprises DC interface, fuse, two-phase A.C. contactor and diode IGBT module T7, an interface of DC interface connects fuse, fuse is connected another interface and is connected respectively the two-phase A.C. contactor with DC interface, an interface of two-phase A.C. contactor connects the E end of diode IGBT module T7; Described Z source impedance network comprises inductance L 1, inductance L 2, capacitor C 1 and capacitor C 2, one end of inductance L 1 is connected with an end of capacitor C 1, the other end of inductance L 1 is connected with an end of capacitor C 2, one end of inductance L 2 is connected with the other end of capacitor C 2, the other end of inductance L 2 is connected with the other end of capacitor C 1, the end that the C end of diode IGBT module T7 is connected with inductance L connects, and another interface of two-phase A.C. contactor connects an end of inductance L 2; Described three phase full bridge circuit comprises diode IGBT module T1～T6, wherein diode IGBT module T1, diode IGBT module T3 are connected the other end of the inductance L 1 in C end and the Z source impedance network and are connected with diode IGBT module T5, and the E of diode IGBT module T2, diode IGBT module T4, diode IGBT module T6 holds with the other end of inductance L 2 in the Z source impedance network and is connected; The E end of diode IGBT module T1 is connected with the C end of diode IGBT module T2, and the E end of diode IGBT module T3 is connected with the C end of diode IGBT module T4, and the E end of diode IGBT module T5 is connected with the C end of diode IGBT module T6; Described ac output end comprises inductance terminals a, inductance terminals b, inductance terminals c, three-phase ac contactor with exchange interface Con2, the E end of diode IGBT module T1, the E end of diode IGBT module T3, the E end of diode IGBT module T5 connects respectively the end of inductance terminals a, the end of inductance terminals b, the end of inductance terminals c, the other end of inductance terminals a, the other end of inductance terminals b, the other end of inductance terminals c connects respectively a end that exchanges interface Con2 by three-phase ac contactor, exchange the b end of interface Con2, exchange the c end of interface Con2.DC interface connects DC power supply, the direct current that obtains after uncontrollable rectification such as solar cell, storage battery or three-phase electricity.A.C. contactor is touched and shields control, connects DC power supply in order to the corresponding command.Diode IGBT module T7 is that Z source basic circuit topology is necessary, and backward channel also is provided simultaneously, (turn-offs conducting when non-short circuit zero vector when the short circuit zero vector) when being in abnormal operating state for elimination Z source hardware supports is provided.Inductance L 1 is identical with inductance L 2 parameters, and capacitor C 1 is identical with capacitor C 2 parameters.For the different capacity capacity and different application, the parameter of inductance and electric capacity is with different, and the utility model design inductance and electric capacity can be changed.For example for 1kW single-phase grid-connected inverter experimental applications, selected electric capacity is two 450V/2200uF series connection, and inductance is two 2.5mH/10A series connection.
In motor-driven is used, inductance terminals a, inductance terminals b, inductance terminals c wire short circuit; In generating electricity by way of merging two or more grid systems, inductance is incorporated into the power networks for inductance terminals a, inductance terminals b, the inductance terminals c external world; From the net inversion time, inductance terminals a, inductance terminals b, inductance terminals c can connect inductance and capacitor filtering.Three-phase ac contactor is touched and shields control, exchanges interface Con2 in order to connect.Exchange interface Con2 and connect AC power or load.
As preferably, Hall voltage sample circuit described in the utility model comprises the Hall voltage transducer, resistance R 1 and resistance R 2, the first measuring junction contact resistance R1 of Hall voltage transducer, one end of resistance R 2 connects the changing voltage output of Hall voltage transducer, the other end ground connection of resistance R 2, Hall voltage sample circuit voltage to be measured has five, be respectively the voltage of an interface end and another interface end two-phase A.C. contactor of two-phase A.C. contactor, the voltage of the c end of diode IGBT module T1 and 1 end of inductance L 2, the a end that exchanges interface Con2 and voltage between the b that exchanges interface Con2 holds, voltage between a end that exchanges interface Con2 and the c end that exchanges interface Con2 and the b that exchanges interface Con2 hold and voltage between the c that exchanges interface Con2 holds, the above five voltage to be measured will be sent into the lifting of carrying out voltage in the booster circuit through the changing voltage that the Hall voltage sample circuit obtains respectively, booster circuit comprises follower a and add circuit, the changing voltage that obtains through the Hall voltage sample circuit carries out voltage follow through follower first, rear and a reference voltage V ref carry out voltage that add operation obtains and send into the DSP control module and sample, the a end of interchange interface Con2 also is admitted in the voltage zero-crossing detection circuit with the voltage between the b that exchanges interface Con2 holds through the voltage z1 that the Hall voltage sample circuit obtains, voltage zero-crossing detection circuit comprises follower b and voltage hysteresis loop comparator, voltage z1 carries out voltage follow through follower first, obtain zero passage detection waveform Cap by the overvoltage hysteresis loop comparator, and send into the DSP control module and carry out zero passage detection.Resistance R 1 is used for regulating primary current, and resistance R 2 is used for regulating the amplitude of the changing voltage that the Hall voltage sample circuit obtains.Be in the three-phase applications at AC, do not need single-phase overvoltage zero cross detection circuit; And be in the single-phase grid-connected application at AC, need single-phase overvoltage zero cross detection circuit.
As preferably, Hall current sample circuit described in the utility model comprises Hall current sensor, resistance R 3, one end of resistance R 3 connects the changing voltage output of Hall current sensor, the other end ground connection of resistance R 3, Hall current sensor electric current to be measured has five, is respectively the electric current of an end of electric current, inductance terminals c of an end of electric current, inductance terminals b of an end of electric current, inductance terminals a of an end of electric current, the inductance L 1 of the E end of diode IGBT module T7; The changing voltage that above-mentioned five electric currents to be measured obtain through the Hall current sample circuit is respectively sent into the lifting of carrying out voltage in the booster circuit, the changing voltage that current Hall current sampling circuit to be measured obtains carries out voltage follow through follower a first, and rear and reference voltage V ref carries out voltage that add operation obtains and sends into the DSP control module and sample.Resistance R 3 is used for regulating the amplitude of the changing voltage that the Hall current sample circuit obtains
As preferably, the utility model reference voltage circuit comprises chip TLV431B and voltage follower c, and chip TLV431B connects and connects a supply voltage by resistance R 9, produces reference voltage v, and this reference voltage is through voltage follower c output reference voltage Vref.This reference voltage is in order to the add operation in the booster circuit and dsp controller AD sampling calibration.
As preferably, DSP control module described in the utility model adopts TMS320F2812 as the core development board.
As preferably, IGBT driver module described in the utility model adopts 7 unit drives plates take driver TX-KA962F and power supply TX-PA202 as core.
The utility model compared with prior art, have the following advantages and effect: this device is suitable for the various application occasions based on Z-source inverter, such as parallel network power generation, speed regualtion of AC motor and uninterrupted power supply UPS etc., taken into full account its versatility requirement under various application occasions; Take this experimental provision as the basis, the developer can carry out more quickly based on the control algolithm research of Z-source inverter and carry out secondary development, shortened the construction cycle and promoted research work efficient, simultaneously, be beneficial to the Z-source inverter theoretical research deeply and apply.
Description of drawings
Fig. 1 is the structural principle block diagram of the utility model embodiment.
Fig. 2 is the circuit theory diagrams of the utility model embodiment power circuit module.
Fig. 3 is the utility model embodiment Hall voltage sample circuit.
Fig. 4 is the circuit theory diagrams of the utility model embodiment Hall current sample circuit.
Fig. 5 is the circuit theory diagrams of the utility model embodiment booster circuit.
Fig. 6 is the circuit theory diagrams of the utility model embodiment voltage zero-crossing detection circuit
Fig. 7 is the circuit theory diagrams of the utility model embodiment reference voltage circuit.
Fig. 8 is the circuit theory diagrams of the utility model embodiment upper computer module.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and by embodiment, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Referring to Fig. 1, present embodiment is based on the general experimental provision of Z-source inverter, comprise power circuit module, signal circuit module, DSP control module, IGBT driver module and upper computer module, upper computer module, power circuit module are connected with the signal circuit module, the signal circuit module is connected with the DSP control module, the DSP control module is connected with the IGBT driver module, and the DSP control module is connected with host computer, and the IGBT driver module is connected with the power circuit module.The signal circuit module comprises Hall sample circuit, voltage zero-crossing detection circuit and reference voltage circuit, voltage zero-crossing detection circuit, reference voltage circuit are connected with the Hall sample circuit, and the Hall sample circuit comprises Hall voltage sample circuit, Hall current sample circuit and booster circuit.The power circuit module comprises direct-flow input end, Z source impedance network, three phase full bridge circuit and exchanges output interface.
Referring to Fig. 8, upper computer module comprises Programmable Logic Controller PLC and touch-screen, and Programmable Logic Controller PLC connects the DSP control module by the RS-485-232 modular converter, and touch-screen is connected with Programmable Logic Controller PLC through the RS-232 communication cable.Upper computer module is mainly finished whole experimental system data acquisition and condition monitoring, and Programmable Logic Controller PLC obtains power circuit operation information and the transfer instruction signal that the DSP module collects through communication cable.Touch screen display system operation information and input instruction signal.When the experiment operation, the user is by the beginning of the contactor of touch-screen power ratio control circuit module, and realization is connected DC side and connected the function of converter; Simultaneously, the user transmits set point by touch-screen to the DSP control module, as: in the UPS test, transmit the power output set point, in electric machine speed regulation, transmit speed setting value.
Comprise DC interface Con1, fuse Fuse, two-phase A.C. contactor KM1 and diode IGBT module T7 referring to Fig. 2 direct-flow input end, the interface of DC interface Con1 connects fuse Fuse, fuse Fuse is connected another interface and is connected two-phase A.C. contactor KM1 with DC interface Con1, the interface of two-phase A.C. contactor KM1 connects the E end of diode IGBT module T7; The Z source impedance network comprises inductance L 1, inductance L 2, capacitor C 1 and capacitor C 2, one end of inductance L 1 is connected with an end of capacitor C 1, the other end of inductance L 1 is connected with an end of capacitor C 2, one end of inductance L 2 is connected with the other end of capacitor C 2, the other end of inductance L 2 is connected with the other end of capacitor C 1, the end that the C end of diode IGBT module T7 is connected with inductance L connects, and another interface of two-phase A.C. contactor KM1 connects an end of inductance L 2; The three phase full bridge circuit comprises diode IGBT module T1～T6, wherein diode IGBT module T1, diode IGBT module T3 are connected the other end of the inductance L 1 in C end and the Z source impedance network and are connected with diode IGBT module T5, and the E of diode IGBT module T2, diode IGBT module T4, diode IGBT module T6 holds with the other end of inductance L 2 in the Z source impedance network and is connected; The E end of diode IGBT module T1 is connected with the C end of diode IGBT module T2, and the E end of diode IGBT module T3 is connected with the C end of diode IGBT module T4, and the E end of diode IGBT module T5 is connected with the C end of diode IGBT module T6; Ac output end comprises inductance terminals aLa, inductance terminals bLb, inductance terminals cLc, three-phase ac contactor KM2 with exchange interface Con2, the E end of diode IGBT module T1, the E end of diode IGBT module T3, the E end of diode IGBT module T5 connects respectively the end of inductance terminals aLa, the end of inductance terminals bLb, the end of inductance terminals cLc, the other end of inductance terminals aLa, the other end of inductance terminals bLb, the other end of inductance terminals cLc connects respectively a end that exchanges interface Con2 by three-phase ac contactor KM2, exchange the b end of interface Con2, exchange the c end of interface Con2.
Referring to Fig. 3, the Hall voltage sample circuit comprises Hall voltage transducer LV, resistance R 1 and resistance R 2, the first measuring junction contact resistance R1 of Hall voltage transducer LV, one end of resistance R 2 connects the changing voltage output of Hall voltage transducer LV, the other end ground connection of resistance R 2, Hall voltage sample circuit voltage to be measured has five, be respectively the voltage (voltage between some a and the some b) of another an interface end interface end and two-phase A.C. contactor KM1 of two-phase A.C. contactor KM1, the voltage of the c end of diode IGBT module T1 and 1 end of inductance L 2 (voltage between some d and the some e), voltage between a end that exchanges interface Con2 and the b end that exchanges interface Con2 (put i and put voltage between the j), voltage (voltage between some i and the some k) between a end that exchanges interface Con2 and the c end that exchanges interface Con2 and the b end that exchanges interface Con2 and voltage between the c that exchanges interface Con2 holds (put j and put voltage between the k), more than five voltages to be measured to send into the lifting of carrying out voltage in the booster circuit through the changing voltage that the Hall voltage sample circuit obtains respectively.
Referring to Fig. 5, booster circuit comprises follower a and add circuit, the changing voltage that obtains through the Hall voltage sample circuit carries out voltage follow through follower a first, rear and a reference voltage V ref carry out voltage that add operation obtains and send into the DSP control module and sample, and the voltage z1 that the voltage process Hall voltage sample circuit of (some i and put voltage between the j) obtains between a end that exchanges interface Con2 and the b end that exchanges interface Con2 also is admitted in the voltage zero-crossing detection circuit.
Referring to Fig. 6, voltage zero-crossing detection circuit comprises follower b and voltage hysteresis loop comparator, and voltage z1 carries out voltage follow through follower b first, obtains zero passage detection waveform Cap by the overvoltage hysteresis loop comparator, and sends into the DSP control module and carry out zero passage detection.
Referring to Fig. 4, the Hall current sample circuit comprises Hall current sensor LI, resistance R 3, one end of resistance R 3 connects the changing voltage output of Hall current sensor LI, the other end ground connection of resistance R 3, Hall current sensor LI electric current to be measured has five, is respectively the electric current (electric current at some a place) of the E end of diode IGBT module T7, the electric current of one end of inductance L 1 (some c), the electric current of the end of inductance terminals aLa (electric current at some f place), the electric current of the end of inductance terminals bLb (electric current at some g place), the electric current of the end of inductance terminals cLc (electric current at some h place); The changing voltage that above-mentioned five electric currents to be measured obtain through the Hall current sample circuit is respectively sent into the lifting of carrying out voltage in the booster circuit, the changing voltage that current Hall current sampling circuit to be measured obtains carries out voltage follow through follower a first, and rear and reference voltage V ref carries out voltage that add operation obtains and sends into the DSP control module and sample.
Referring to Fig. 7, reference voltage circuit comprises chip TLV431B and voltage follower c, and chip TLV431B connection connects a supply voltage by resistance R 9, produces reference voltage v, and this reference voltage v is through voltage follower c output reference voltage Vref.
The DSP control module adopts TMS320F2812 as the core development board.The IGBT driver module adopts 7 unit drives plates take driver TX-KA962F and power supply TX-PA202 as core.The IGBT driver module is connected to control the turn-on and turn-off of diode IGBT module T1, T2, T3, T4, T5, T6, T7 with the power circuit module.
Above content described in this specification only is to the explanation of the utility model example.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; only otherwise depart from the content of the utility model specification or surmount this scope as defined in the claims, all should belong to protection range of the present utility model.
Claims (10)
1. general experimental provision based on Z-source inverter, it is characterized in that: comprise that power circuit module, signal circuit module, DSP control module, IGBT driver module and upper computer module, power circuit module are connected with the signal circuit module, the signal circuit module is connected with the DSP control module, the DSP control module is connected with the IGBT driver module, the DSP control module is connected with host computer, and the IGBT driver module is connected with the power circuit module.
2. the general experimental provision based on Z-source inverter according to claim 1, it is characterized in that: described signal circuit module comprises the Hall sample circuit, voltage zero-crossing detection circuit and reference voltage circuit, voltage zero-crossing detection circuit, reference voltage circuit is connected with the Hall sample circuit, the Hall sample circuit comprises the Hall voltage sample circuit, Hall current sample circuit and booster circuit, a Hall voltage sample circuit connects the DSP module by voltage zero-crossing detection circuit and connects the transmission reference voltage signal, the Hall current sample circuit with are connected the Hall voltage sample circuit and all connect the DSP module by booster circuit separately, reference voltage circuit is connected with booster circuit, and reference voltage circuit is connected the transmission reference voltage signal with the DSP module.
3. the general experimental provision based on Z-source inverter according to claim 1 and 2, it is characterized in that: described power circuit module comprises direct-flow input end, Z source impedance network, three phase full bridge circuit and exchanges output interface, direct-flow input end is connected with the Z source impedance network, the Z source impedance network is connected with the three phase full bridge circuit, and the three phase full bridge circuit is connected with the interchange output interface.
4. the general experimental provision based on Z-source inverter according to claim 1 and 2, it is characterized in that: described upper computer module comprises Programmable Logic Controller and touch-screen, Programmable Logic Controller connects the DSP control module by modular converter, and touch-screen is connected with Programmable Logic Controller through communication cable.
5. the general experimental provision based on Z-source inverter according to claim 3, it is characterized in that: described direct-flow input end comprises DC interface, fuse, two-phase A.C. contactor and diode IGBT module T7, an interface of DC interface connects fuse, fuse is connected another interface and is connected respectively the two-phase A.C. contactor with DC interface, an interface of two-phase A.C. contactor connects the E end of diode IGBT module T7; Described Z source impedance network comprises inductance L 1, inductance L 2, capacitor C 1 and capacitor C 2, one end of inductance L 1 is connected with an end of capacitor C 1, the other end of inductance L 1 is connected with an end of capacitor C 2, one end of inductance L 2 is connected with the other end of capacitor C 2, the other end of inductance L 2 is connected with the other end of capacitor C 1, the end that the C end of diode IGBT module T7 is connected with inductance L connects, and another interface of two-phase A.C. contactor connects an end of inductance L 2; Described three phase full bridge circuit comprises diode IGBT module T1～T6, wherein diode IGBT module T1, diode IGBT module T3 are connected the other end of the inductance L 1 in C end and the Z source impedance network and are connected with diode IGBT module T5, and the E of diode IGBT module T2, diode IGBT module T4, diode IGBT module T6 holds with the other end of inductance L 2 in the Z source impedance network and is connected; The E end of diode IGBT module T1 is connected with the C end of diode IGBT module T2, and the E end of diode IGBT module T3 is connected with the C end of diode IGBT module T4, and the E end of diode IGBT module T5 is connected with the C end of diode IGBT module T6; Described ac output end comprises inductance terminals a, inductance terminals b, inductance terminals c, three-phase ac contactor with exchange interface Con2, the E end of diode IGBT module T1, the E end of diode IGBT module T3, the E end of diode IGBT module T5 connects respectively the end of inductance terminals a, the end of inductance terminals b, the end of inductance terminals c, the other end of inductance terminals a, the other end of inductance terminals b, the other end of inductance terminals c connects respectively a end that exchanges interface Con2 by three-phase ac contactor, exchange the b end of interface Con2, exchange the c end of interface Con2.
6. the general experimental provision based on Z-source inverter according to claim 5, it is characterized in that: described Hall voltage sample circuit comprises the Hall voltage transducer, resistance R 1 and resistance R 2, the first measuring junction contact resistance R1 of Hall voltage transducer, one end of resistance R 2 connects the changing voltage output of Hall voltage transducer, the other end ground connection of resistance R 2, Hall voltage sample circuit voltage to be measured has five, be respectively the voltage of an interface end and another interface end two-phase A.C. contactor of two-phase A.C. contactor, the voltage of the c end of diode IGBT module T1 and 1 end of inductance L 2, the a end that exchanges interface Con2 and voltage between the b that exchanges interface Con2 holds, voltage between a end that exchanges interface Con2 and the c end that exchanges interface Con2 and the b that exchanges interface Con2 hold and voltage between the c that exchanges interface Con2 holds, the above five voltage to be measured will be sent into the lifting of carrying out voltage in the booster circuit through the changing voltage that the Hall voltage sample circuit obtains respectively, booster circuit comprises follower a and add circuit, the changing voltage that obtains through the Hall voltage sample circuit carries out voltage follow through follower a first, rear and a reference voltage V ref carry out voltage that add operation obtains and send into the DSP control module and sample, the a end of interchange interface Con2 also is admitted in the voltage zero-crossing detection circuit with the voltage between the b that exchanges interface Con2 holds through the voltage z1 that the Hall voltage sample circuit obtains, voltage zero-crossing detection circuit comprises follower b and voltage hysteresis loop comparator, voltage z1 carries out voltage follow through follower b first, obtain zero passage detection waveform Cap by the overvoltage hysteresis loop comparator, and send into the DSP control module and carry out zero passage detection.
7. the general experimental provision based on Z-source inverter according to claim 6, it is characterized in that: described Hall current sample circuit comprises Hall current sensor, resistance R 3, one end of resistance R 3 connects the changing voltage output of Hall current sensor, the other end ground connection of resistance R 3, Hall current sensor electric current to be measured has five, is respectively the electric current of an end of electric current, inductance terminals c of an end of electric current, inductance terminals b of an end of electric current, inductance terminals a of an end of electric current, the inductance L 1 of the E end of diode IGBT module T7; The changing voltage that above-mentioned five electric currents to be measured obtain through the Hall current sample circuit is respectively sent into the lifting of carrying out voltage in the booster circuit, the changing voltage that current Hall current sampling circuit to be measured obtains carries out voltage follow through follower a first, and rear and reference voltage V ref carries out voltage that add operation obtains and sends into the DSP control module and sample.
8. the general experimental provision based on Z-source inverter according to claim 6, it is characterized in that: reference voltage circuit comprises chip TLV431B and voltage follower c, chip TLV431B connection connects a supply voltage by resistance R 9, produce reference voltage v, this reference voltage v is through voltage follower c output reference voltage Vref.
9. the general experimental provision based on Z-source inverter according to claim 1 and 2 is characterized in that: described DSP control module adopts TMS320F2812 as the core development board.
10. the general experimental provision based on Z-source inverter according to claim 1 and 2 is characterized in that: described IGBT driver module adopts 7 unit drives plates take driver TX-KA962F and power supply TX-PA202 as core.
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| CN 201220547494 CN202906780U (en) | 2012-10-24 | 2012-10-24 | General experimental device based on Z-source inverter |
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| CN 201220547494 CN202906780U (en) | 2012-10-24 | 2012-10-24 | General experimental device based on Z-source inverter |
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| CN 201220547494 Expired - Fee Related CN202906780U (en) | 2012-10-24 | 2012-10-24 | General experimental device based on Z-source inverter |
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