CN206251000U - Inverter circuit based on HPWM modulation - Google Patents
Inverter circuit based on HPWM modulation Download PDFInfo
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- CN206251000U CN206251000U CN201621397199.7U CN201621397199U CN206251000U CN 206251000 U CN206251000 U CN 206251000U CN 201621397199 U CN201621397199 U CN 201621397199U CN 206251000 U CN206251000 U CN 206251000U
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- hpwm
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Abstract
The utility model is related to the inverter circuit based on HPWM modulation, the main loop of power circuit of DC/AC including being driven by drive circuit and the digital control module of drive circuit connection, be connected output signal with the digital control module respectively and detect circuit and circuit for checking input signals, and the auxiliary power circuit of power supply, the H bridge topological structures being made up of four MOSFET are wherein included in the main loop of power circuit of DC/AC, the base stage of four MOSFET connects the output end of drive circuit respectively；Four described MOSFET are driven by two binary channels grid drive chips in drive circuit, and is isolated with the main loop of power circuit of DC/AC.The utility model can realize exporting the distortion factor and efficiency of AC sine waveform while ensureing to optimize, and realize the mutually isolated of DC/AC power main loops and digital control module, avoid and damaged caused by power main loop such as is short-circuited at the failure to digital processing chip, while also achieving the hardware field programming function in the dead band and overlapping time to HPWM ripples.
Description
Technical field
The utility model is related to circuit structure, is concretely the inverter circuit based on HPWM modulation.
Background technology
Inverter technology is an application for combining electronic power switch device, power conversion, analog- and digital- electricity
Sub- technology, PWM (pulse width modulation) technology, frequency and phase modulation technique, switch power technology and control technology etc. it is comprehensive
Sexology section is closed, has been widely used in the speed governing of ac motor speed change, the feedback of the motor brake renewable sources of energy, uninterrupted power source system
Various power conversion systems and device in the industrial circles and civil area such as system, sensing heating, Arc Welding Power, variable-frequency power sources
In.In the application of Power Electronic Technique and various power-supply systems, inverter technology is in core status.
At present, it is combined with digital circuit using analog circuit control or analog circuit more than traditional inverter system
Control mode.It is quite ripe that the analog circuit control system technology of inverter has developed, but, analog circuit control
But there is inherent defect, not only the discrete component of its control circuit is relatively more, and circuit is complicated, device aging and heat are floated etc. because
Element can influence the performance of whole system, and its flexibility and portability are very poor, and hardware control circuit once designs completion, just
It is difficult to change its control strategy again.
In recent years, with the development of various digitial controllers, the control system of inverter is gradually sent out to digitlization direction
Exhibition.But, more than the sinusoidal pulse width modulation in current inverter system using bipolar modulation (Bipolar PWM) mode or
Unipolarity modulates (Unipolar PWM) mode.Under both modulation systems, the power tube of inverter is with switch higher
Frequency works, although having obtained comparatively ideal output sinusoidal voltage waveform, its cost is to generate larger switching loss.Open
Pass frequency is higher, and waveform is more preferable, but loss is bigger, and the two is conflicting.Due to the inverter of numeric type common at present
Above two modulation control mode is used controller more, and bipolar modulation (Bipolar PWM) mode and unipolarity are modulated
The inherent defect that (Unipolar PWM) mode itself is present, causes the inverter system based on its principle always to meet
The requirement that the distortion factor and efficiency are improved simultaneously.
Meanwhile, the general program by changing controller of dead band regulation of the PWM ripples of conventional digital type inverter system
Carry out, it is impossible to it is modified and debugged online.And its DC/AC power main loop and digital control module do not apply measure and enter
Row isolation, so that the failure of DC/AC power main loops often causes unpredictable damage to costly digital control module
It is bad.Therefore need to design a kind of Multifunction inverter system of new modulation technique to adapt to high efficiency low distortion, make
It has application value and economic benefit higher.
Utility model content
The utility model provides a kind of inverter circuit based on HPWM modulation, is capable of achieving the mistake of output AC sine waveform
True degree and efficiency are optimized simultaneously, and realize the mutually isolated of DC/AC power main loops and digital control module.
The utility model be based on HPWM modulation inverter circuit, including by drive circuit drive for realizing inversion
The main loop of power circuit of DC/AC and the digital control module of drive circuit connection, with the digital control module it is connected defeated respectively
Go out signal deteching circuit and circuit for checking input signals, and be the drive circuit, digital control module, output signal detection
The auxiliary power circuit that circuit and circuit for checking input signals are powered, wherein being included by four in the main loop of power circuit of DC/AC
The H bridge topological structures that MOSFET (metal-oxide half field effect transistor) is constituted, the base stage of four MOSFET connects driving electricity respectively
The output end on road；In drive circuit four described MOSFET, and DC/AC are driven by two binary channels grid drive chips
Main loop of power circuit is isolated by described binary channels grid drive chip with the digital control module, and the main power of DC/AC is returned
The unpredictable influence that the failure on road is produced is excluded outside digital control module.Four described MOSFET, can use work(
Rate MOSFET, you can to export the MOSFET of larger operating current.
HPWM modulation refers to mixing Unipolar SPWM modulation technique (Hybird PWM, HPWM), is a kind of based on bipolar
Property modulation and unipolarity modulation improved a kind of modulation technique.Two of one of bridge arm during work in H bridges topological structure
MOSFET is operated in high frequency, with switching frequency complementary switch higher, it is ensured that can obtain preferable sine output voltage ripple
Shape, and two MOSFET of another bridge arm are operated in low frequency, are worked with relatively low fundamental voltage output of voltage frequency, significantly
Reduce switching loss.By this modulation system, realize inverter system whole efficiency and output sine voltage loses
True degree is while being optimal.
Further, the input with the main loop of power circuit of DC/AC is parallel with input capacitance, is used to decouple and filters.
Further, the filter circuit that electric capacity and inductance are constituted is provided between two pairs of bridge arms of the H bridges topological structure.LC
Filter circuit is a kind of common filter structure, and high fdrequency component can be eliminated by LC filter circuits, is obtained containing only fundametal compoment
Sine voltage.
On this basis, it is additionally provided with the keyboard being connected with digital control module.The keyboard can be 3 × 3 common shapes
The keyboard of formula, user can realize man-machine interaction by the frequency and amplitude of the desired output end sine wave of input through keyboard.
Preferably, described digital control module is the module based on STM32F407 type arm processor chips.The module
And the application of the module is current mature technology, is not detailed herein.
Preferably, drive circuit includes two binary channels grid drive chips of UCC21520 types, by changing
DT (dead band programming end) resistance of potentiometer and GND (earth terminal) between of UCC21520 driving chips realizes HPWM ripples dead band
With the hardware online programming of overlapping time, it is to avoid the step of for regulation dead band again burning control program, debugging system is improve
The efficiency of system.
The utility model is based on the inverter circuit of HPWM modulation, can realize exporting the distortion factor and effect of AC sine waveform
Rate ensures to optimize simultaneously, and realize the mutually isolated of DC/AC power main loops and digital control module, it is to avoid because of work(
The failure that rate major loop is short-circuited etc. causes to damage to digital processing chip, while also achieving the dead band to HPWM ripples and overlap
The hardware field programming function of time.
Specific embodiment with reference to embodiments, remakes further specifically to the above of the present utility model
It is bright.But this scope for being interpreted as the above-mentioned theme of the utility model should not be only limitted to following example.It is new this practicality is not departed from
In the case of the above-mentioned technological thought of type, according to various replacements or change that ordinary skill knowledge and customary means are made,
Should be included in the range of the utility model.
Brief description of the drawings
Fig. 1 is the circuit diagram of the inverter circuit that the utility model is based on HPWM modulation.
Specific embodiment
Inverter circuit based on HPWM modulation of the present utility model, including the use driven by drive circuit as shown in Figure 1
The digital control module that connects in the main loop of power circuit of DC/AC for realizing inversion and the drive circuit, respectively with the numeral control
Output signal detection circuit and the circuit for checking input signals of molding block connection, and be the drive circuit, digital control mould
The auxiliary power circuit that block, output signal detection circuit and circuit for checking input signals are powered.Wherein in the main loop of power circuit of DC/AC
In include the H bridges being made up of four MOSFET of power form of tubes (metal-oxide half field effect transistor) VT1, VT2, VT3, VT4 and open up
Structure is flutterred, is used to realize direct current to the conversion of alternating current.Four MOSFET (metal-oxide half field effect transistor) VT1, VT2,
The base stage of VT3, VT4 connects the output end of drive circuit respectively.Input with the main loop of power circuit of DC/AC is parallel with input capacitance
Cin, it is used to decouple and filters.Connect the first inductance L between two pairs of bridge arms of H bridge topological structures1With the second inductance L2, Yi Ji electricity
Hold Cout, high fdrequency component is eliminated by bilateral LC filter circuits, obtain the sine voltage U containing only fundametal compomentout。
In drive circuit four described MOSFET are driven by two binary channels grid drive chips of UCC21520 types
(metal-oxide half field effect transistor) VT1, VT2, VT3, VT4, and the main loop of power circuit of DC/AC is by described binary channels raster data model
Chip is isolated with the digital control module.And also can be in the DT (dead band programming end) and GND of UCC21520 driving chips
One potentiometer of 50K of series connection, realizes that HPWM ripples dead band and overlapping time 0 compile online to the hardware of 500ns between (earth terminal)
Journey, it is to avoid the step of for regulation dead band again burning control program.
Digital control module is using the module based on STM32F407 type arm processor chips ripe at present.It is digital control
Module, to the inversion control of the main loop of power circuit of DC/AC, makes the mistake of output AC sine waveform by HPWM ripples modulation technology
True degree and efficiency are while being optimal.It is additionally provided with the keyboard being connected with digital control module.Keyboard uses 3 × 3 common shapes
Formula, user can realize man-machine interaction by the frequency and amplitude of the desired output end sine wave of input through keyboard.
In output signal detection circuit, RLIt is load resistance, RtIt is sampling resistor, is and load resistance RLThe milli of series connection
The resistance of Europe magnitude, is used to detect output current Iout.When the main loop of power circuit of inverter DC/AC works, sampling resistor RtTwo
End can produce certain sampled voltage Ut, so realize output current IoutBe converted to sampled voltage Ut, it is easy to electric current
Detection.By input direct voltage Uin, output AC voltage UoutWith sampled voltage UtIt is corresponding to be input to output signal detection circuit
In circuit for checking input signals, and amplitude to three is linearly adjusted, to meet the A/D converter in digital control module
The voltage magnitude requirement of sampling input.In output signal detects circuit and circuit for checking input signals, by input voltage
Partial pressure and to export alternating current amplifier, deliver to the A/D converter of the digital control module of STM32F407 types, and
The input overvoltage protection and output overcurrent for realizing whole inverter circuit by digital control module are protected, and maximized guarantee is to whole
The protection of system.
In control aspect, the STM32F407 chips of digital control module are incrementally read by capturing timer interruption
The data write into ROM are taken, control of the HPWM ripples realization to the main loop of power circuit of DC/AC is sent.A/D in digital control module turns
The analogue transformation of output signal detection circuit output to be processed by STM32F407 chips after digital quantity, is worked as number by parallel operation
When word control module detects voltage and reaches default threshold value, into disability timer, so as to realize being input into overvoltage protection, output
The function of the amplitude, frequency and phase of overcurrent protection and real-time monitoring output voltage.UpIt is the ginseng of additional input sine wave
Signal is examined, output signal detection circuit is by comparator respectively by reference signal UpWith output AC voltage UoutIt is processed as square wave
Signal is conveyed to digital control module STM32F407 chips, and (timer leads to digital control module input capture signal TIM_CH1
Road 1) rising edge and TIM_CH2 (timer passage 2) rising edges and gradually eliminate phase difference, with this realize output sine wave with
The function of track input sine wave reference signal phase.
Claims (6)
1. the inverter circuit modulated based on HPWM, it is characterized by：Including the DC/ for realizing inversion driven by drive circuit
The main loop of power circuit of AC and the digital control module of drive circuit connection, with the digital control module it is connected output respectively
Signal deteching circuit and circuit for checking input signals, and be the drive circuit, digital control module, output signal detection electricity
The auxiliary power circuit that road and circuit for checking input signals are powered, wherein being included by four in the main loop of power circuit of DC/AC
The H bridge topological structures that MOSFET (VT1, VT2, VT3, VT4) is constituted, the base of four MOSFET (VT1, VT2, VT3, VT4)
Pole connects the output end of drive circuit respectively；In drive circuit described four are driven by two binary channels grid drive chips
MOSFET (VT1, VT2, VT3, VT4), and the main loop of power circuit of DC/AC by described binary channels grid drive chip with it is described
Digital control module is isolated.
2. it is as claimed in claim 1 to be based on the inverter circuit that HPWM is modulated, it is characterized by：It is defeated with the main loop of power circuit of DC/AC
Enter end and be parallel with input capacitance Cin。
3. it is as claimed in claim 1 to be based on the inverter circuit that HPWM is modulated, it is characterized by：Two couple of the H bridges topological structure
The filter circuit that electric capacity and inductance are constituted is provided between bridge arm.
4. as described in one of claims 1 to 3 based on HPWM modulation inverter circuit, it is characterized by：Be provided with it is digital control
The keyboard of module connection.
5. as described in one of claims 1 to 3 based on HPWM modulation inverter circuit, it is characterized by：Described is digital control
Module is the module based on STM32F407 type arm processor chips.
6. as described in one of claims 1 to 3 based on HPWM modulation inverter circuit, it is characterized by：Drive circuit includes
Two binary channels grid drive chips of UCC21520 types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621397199.7U CN206251000U (en) | 2016-12-19 | 2016-12-19 | Inverter circuit based on HPWM modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621397199.7U CN206251000U (en) | 2016-12-19 | 2016-12-19 | Inverter circuit based on HPWM modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206251000U true CN206251000U (en) | 2017-06-13 |
Family
ID=59008499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621397199.7U Expired - Fee Related CN206251000U (en) | 2016-12-19 | 2016-12-19 | Inverter circuit based on HPWM modulation |
Country Status (1)
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| CN (1) | CN206251000U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741756A (en) * | 2017-11-16 | 2018-02-27 | 中国铁道科学研究院 | The drive circuit of IGBT switching characteristic dynamically changeables and guard method |
| US20210093012A1 (en) * | 2017-12-21 | 2021-04-01 | Nicoventures Trading Limited | Circuitry for a plurality of induction elements for an aerosol generating device |
| US11672054B2 (en) | 2017-12-21 | 2023-06-06 | Nicoventures Trading Limited | Circuitry for an induction element for an aerosol generating device |
-
2016
- 2016-12-19 CN CN201621397199.7U patent/CN206251000U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741756A (en) * | 2017-11-16 | 2018-02-27 | 中国铁道科学研究院 | The drive circuit of IGBT switching characteristic dynamically changeables and guard method |
| US20210093012A1 (en) * | 2017-12-21 | 2021-04-01 | Nicoventures Trading Limited | Circuitry for a plurality of induction elements for an aerosol generating device |
| US11672054B2 (en) | 2017-12-21 | 2023-06-06 | Nicoventures Trading Limited | Circuitry for an induction element for an aerosol generating device |
| US11800605B2 (en) * | 2017-12-21 | 2023-10-24 | Nicoventures Trading Limited | Circuitry for a plurality of induction elements for an aerosol generating device |
| US20240130011A1 (en) * | 2017-12-21 | 2024-04-18 | Nicoventures Trading Limited | Circuitry for a plurality of induction elements for an aerosol generating device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170613 Termination date: 20191219 |