CN102624203A - Frequency converter and inverter air conditioner - Google Patents
Frequency converter and inverter air conditioner Download PDFInfo
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- CN102624203A CN102624203A CN2011100287493A CN201110028749A CN102624203A CN 102624203 A CN102624203 A CN 102624203A CN 2011100287493 A CN2011100287493 A CN 2011100287493A CN 201110028749 A CN201110028749 A CN 201110028749A CN 102624203 A CN102624203 A CN 102624203A
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Abstract
The invention provides a frequency converter and an inverter air conditioner. The frequency converter comprises a power factor correction circuit and an inverter circuit with an inverter, wherein the power factor correction circuit and the inverter circuit are integrated. The inverter air conditioner of the invention comprises the frequency converter. Compared with a traditional discrete device scheme, power devices are highly integrated, the parasitic parameter of a wire is reduced, and noise voltage is further greatly reduced. The power devices are integrated on a same substrate within a module, improving production efficiency and enhancing reliability of the module.
Description
Technical field
The present invention relates to field of air conditioning, particularly, relate to a kind of variable-frequency governor and transducer air conditioning.
Background technology
At present, extensively adopted the ac-dc-ac inverter drive scheme in the domestic variable frequency air-conditioning, owing to adopted traditional uncontrollable rectification, it is big that air conditioner exchanges the input side harmonic content, causes the electrical network serious pollution; Product certification has strict technical requirement to harmonic current; Dc voltage de-stabilising effect air-conditioning performance of products.
For solving this type of problem, increasing power factor correction in the DC side prime is current industry way widely.Mostly be to adopt discrete insulated gate bipolar transistor IGBT+fast recovery diode+SPM to realize the prime power factor correction in the present air-conditioning product, back level inversion constitutes whole frequency conversion speed-adjusting system.Fig. 1 and Fig. 2 illustrate the frequency control scheme that has power factor emendation function that comparatively ripe at present employing discrete device is realized; Referring to Fig. 1 and Fig. 2; There is certain problem in the more power device of this scheme in production and assembling process: the unified and device orientation problem like the power device setting height(from bottom); In order to guarantee that setting height(from bottom) need adopt special fixed high frock, has a strong impact on production efficiency in the operating process; Secondly can not mate fully as if setting height(from bottom); Each power device radiating surface will be or not same plane; The device pin stress deformation is caused in the mounting screw location, and module heat dissipating can be had a strong impact on simultaneously, and the pin of distortion increases with the bad possibility of device failure that causes of heat radiation; In addition because the influence of the restriction of device outline packages and electrical equipment case structure causes cabling lengthening between the power device pin; Long cabling increases stray inductance, the electric capacity on the circuit; The current signal that changes at a high speed makes the bigger noise voltage of generation on the circuit, and the spike of noise voltage is had higher requirement to the withstand voltage of device, and this noise voltage also is bigger interference source simultaneously; Be diffused in the entire controller circuit, the antijamming capability of control system needs further to strengthen.
In the prior art, big for above-mentioned noise voltage, the assembling complicated problems does not propose effective solution at present as yet.
Summary of the invention
The objective of the invention is to propose a kind of variable-frequency governor and transducer air conditioning, be used for solving big, the assembling complicated problems of noise voltage that prior art exists.
According to an aspect of the present invention, a kind of variable-frequency governor is provided, has adopted following technical scheme:
Variable-frequency governor comprises circuit of power factor correction and the inverter circuit that has inverter, and said circuit of power factor correction is mutually integrated with said inverter circuit.
Further, said variable-frequency governor also comprises: drive and protective circuit, comprise drive circuit, wherein, said drive circuit comprises power factor correction driver circuit and inverter driving circuit; Wherein, said power factor correction driver circuit is connected in the driving resistor in the said circuit of power factor correction, and said inverter driving circuit is connected in the driving resistor in the said inverter circuit.
Further, said driving and protective circuit also comprise: circuit overcurrent protection connects and said circuit of power factor correction and said inverter circuit; And the temperature overload protecting circuit, comprising the temperature protection output, said temperature overload protecting circuit connects said temperature protection output through thermistor.
Further, said protective circuit comprises following any one or more ports: fault-signal output and enable port; Power factor correction overcurrent protection input port; And inverter overcurrent protection input port.
Further, said drive circuit has inverter driving signal input part and power factor correction driving signal input.
Further, said inverter driving signal input part comprises: go up brachium pontis drive signal end and following brachium pontis drive signal end.
According to another aspect of the present invention, a kind of transducer air conditioning is provided, this transducer air conditioning comprises said variable-frequency governor.
Compared with prior art, the invention has the beneficial effects as follows: compare with traditional discrete device scheme, the power device height is integrated, has reduced the parasitic parameter on the lead, and noise voltage also reduces greatly; Each power device is integrated in the module on the same substrate, has improved production efficiency, and has strengthened the reliability of module.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the frequency conversion speed-adjusting system structural representation of the described discrete device of background technology according to the present invention;
Fig. 2 is the structure chart that the part with variable-frequency governor among Fig. 1 specifically illustrates;
Fig. 3 is according to the inner main circuit figure of the variable-frequency governor of the embodiment of the invention;
Fig. 4 is the concrete internal circuit diagram according to the variable-frequency governor of the embodiment of the invention;
Fig. 5 is the module map of the variable-frequency governor of Fig. 4 embodiment according to the present invention; And
Fig. 6 is the concrete internal module figure according to the driving of the embodiment of the invention and protective circuit.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Fig. 3 is the primary structure figure according to the variable-frequency governor of the embodiment of the invention; Referring to shown in Figure 3; Variable-frequency governor 201 comprises circuit of power factor correction 2011 and the inverter circuit 2012 that has the inverter (not shown), and circuit of power factor correction 2011 is integrated on the module with inverter circuit 2012.This circuit of power factor correction 2011 and inverter circuit 2012 are integrated on the module compared with traditional discrete device scheme, and the power device height is integrated, and the area of the shared printed circuit board of device reduces greatly, has reduced the cost of printed board; Distance is shorter between the power device, has reduced the conductor length between the device pin, has reduced the parasitic parameter on the lead, and noise voltage also reduces greatly; Each power device is integrated in the module on the same substrate; Through after the epoxy encapsulation, directly module is fixed on the radiator in the production process, greatly reduce module installing and locating difficulty; Improved production efficiency; And module and radiator are fitted closely, help module heat dissipating, have strengthened the reliability of module.
Preferably; Propose a kind of IC design scheme to such scheme, power factor correction (PFC) part and inversion module part highly are integrated into a new power model and design the inversion part and partly driving of power factor correction, overcurrent protection and fault-signal output.Fig. 4 is the concrete internal circuit diagram according to the variable-frequency governor of the embodiment of the invention, is made up of circuit of power factor correction 2011, inverter circuit 2012, driving and protective circuit 2013.Power factor correction (PFC) drive signal and inversion drive signal by main control chip through over-sampling, calculate, various guard signals are accomplished by the simulation protective circuit.
Preferably, power factor correction (PFC) circuit 2011 is made up of insulated gate bipolar transistor, two fast recovery diodes and driving resistor.
Preferably, inverter circuit is made up of six insulated gate bipolar transistors, six fast recovery diodes and driving resistor.
Preferably, drive circuit is made up of PFC driving, inverter driving circuit
Preferably, protective circuit is made up of PFC overcurrent, inverter overcurrent and temperature overload protecting circuit.
Specifically referring to shown in Fig. 4-5, variable-frequency governor is made up of three parts:
Circuit of power factor correction part (S1) comprising: insulated gate bipolar transistor Q7, fast recovery diode D7 and D8, gate driving resistance R 7;
Inverter circuit (S2) comprising: insulated gate bipolar transistor Q1, Q2, Q3, Q4, Q5, Q6; Fast recovery diode D1, D2, D3, D4, D5, D6; Gate driving resistance R 1, R2, R3, R4, R5, R6; Inverter output end U (13), V (9), W (5), low side emitter output VRU (22), VRV (21), VRW (20);
Drive part (S3) comprising: inverter six tunnel drive signals: HIN1 (23), HIN2 (24), HIN3 (25), LIN1 (26), LIN2 (27), LIN3 (28); Power factor correction drive signal PFC-in (29); High-end floating power supply end VB1 (12), VB2 (8), VB3 (9), bootstrap capacitor C4, C5, C6; Protective circuit partly comprises inverter overcurrent protection input ITRIP (32), power factor correction (PFC) overcurrent protection input PFCTRIP (31), fault output and Enable Pin
(30); Low side power supply and ground VCC (34), VSS (35); Temperature protection output TH.
Among Fig. 4, each pin definitions is following:
Above-mentionedly circuit of power factor correction 2011 and inverter circuit 2012 be integrated in an advantage on the module be:
Low-voltage is blocked output; The brownout of driving power device is very disadvantageous to the work of module; Low-voltage is blocked and is guaranteed that through a voltage hysteresis loop comparator is set module low side power supply and high-end floating power supply are operated under the desired voltage; Normally export greater than the higher limit Va module drive signal of voltage hysteresis loop comparator like VCC or VBS voltage, if VCC or VBS voltage block all drive signals less than the lower limit Vb module of voltage hysteresis loop comparator.
Anti-straight-through logical circuit; Straight-through for two power devices about preventing the same brachium pontis of inverter, cause module short circuit, the built-in anti-straight-through logical circuit of module, when the upper and lower bridge arm input signal is effective simultaneously, the drive signal that lockout module is inner.
Inner integrated bootstrap diode; The novel intelligent power model is integrated in inside modules with the bootstrap diode of inverter high-side driver, has reduced the module peripheral wiring, makes hardware designs simpler, reliable.
Inverter and power factor correction overcurrent protection; Module-external can be built current detection circuit and detected inverter and power factor correction electric current; Testing circuit is converted into voltage signal Vx1 and Vx2 with current signal; And with these two signals the ITRIP pin and the PFCTRIP pin of AM access module respectively; In case in service electric current to occur excessive; Vx1 is greater than the threshold voltage of ITRIP pin or the Vx2 threshold voltage greater than the PFCITRIP pin, and inside modules is blocked each road drive signal and sent fault-signal through
pin to main control chip.
Fault-signal output; The fault-signal output pin is an open-drain, the controlled MOSFET of grid, and when module breaks down when main control chip is reported to the police, inside modules Driven MOSFET grid, drain pin voltage drag down the purpose that reaches fault-signal output with this.Referring to Fig. 4, driving and protective circuit module are provided with VS1, VS2 and VS3 three-phase bootstrapping signal.
Electrification reset and built-in persistent fault are removed time-delay; Electrify restoration circuit is made up of R9, C3, and power supply VCC is through 3 chargings of 9 pairs of capacitor C of resistance R when powering on, and module is blocked each road drive signal when voltage is lower than threshold value Vc on the capacitor C 3, and module is lifted a blockade when voltage is higher than threshold value Vc on the capacitor C 3.When inside modules breaks down; Module is blocked each road drive signal and is passed through
when main control chip is reported to the police; Voltage on the capacitor C 3 is forced and bleeds off; After the fault clearance, C3 continues charging through R9, and module is lifted a blockade when voltage is higher than threshold value Vc on the capacitor C 3; The charging interval of capacitor C 3 is fault clearance time-delay, can set the effective width of fault-signal and is convenient to main control chip identification through designing this time-delay.
Built-in temperature detects resistance, carries out excess temperature, overload protection; Inside modules is built-in NTC thermistor; Through inserting the temperature that pull-up circuit comes the inner wafer of detection module in the module outside; Voltage on the high more thermistor of module temperature is low more, can effectively carry out excess temperature and overload protection through temperature detection, improves the reliability of module.
The design of arranging of inside modules power device and control circuit has directly influenced the temperature characterisitic of module and the reliability of module; Circuit of power factor correction is operated in higher switching frequency because of it; Bigger du/dt that produces in the power device work and di/dt are the major sources of noise always, and the length of cabling directly influences the degree of noise between the power device pin.
Specifically referring to shown in Figure 6; Fig. 6 is the concrete internal module figure according to the driving of the embodiment of the invention and protective circuit; Driving and protective circuit specifically comprise drive circuit, circuit overcurrent protection and temperature overload protecting circuit, wherein; The external-connected port of circuit overcurrent protection, fault-signal output and enable port; Power factor correction overcurrent protection input port; And inverter overcurrent protection input port difference joint detection device, be used for circuit of power factor correction and inverter circuit are detected; The temperature overload protecting circuit detects foregoing circuit through thermistor.
Therefore can find out that compare with traditional discrete device scheme, the power device height is integrated, has reduced the parasitic parameter on the lead, noise voltage also reduces greatly; Each power device is integrated in the module on the same substrate, has improved production efficiency, and has strengthened the reliability of module.
According to another aspect of the present invention, a kind of transducer air conditioning is provided, has comprised above-mentioned variable-frequency governor 201.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a variable-frequency governor comprises circuit of power factor correction and the inverter circuit that has inverter, it is characterized in that said circuit of power factor correction is mutually integrated with said inverter circuit.
2. variable-frequency governor according to claim 1 is characterized in that, also comprises:
Drive and protective circuit, comprise drive circuit, wherein, said drive circuit comprises power factor correction driver circuit and inverter driving circuit;
Wherein, said power factor correction driver circuit is connected in the driving resistor in the said circuit of power factor correction, and said inverter driving circuit is connected in the driving resistor in the said inverter circuit.
3. variable-frequency governor according to claim 2 is characterized in that, said driving and protective circuit also comprise:
Circuit overcurrent protection connects and said circuit of power factor correction and said inverter circuit; And
The temperature overload protecting circuit comprises the temperature protection output, and said temperature overload protecting circuit connects said temperature protection output through thermistor.
4. variable-frequency governor according to claim 3 is characterized in that, said circuit overcurrent protection comprises following any one or more ports:
Fault-signal output and enable port;
Power factor correction overcurrent protection input port; And
Inverter overcurrent protection input port.
5. variable-frequency governor according to claim 2 is characterized in that, said drive circuit has inverter and drives signal input part and power factor correction driving signal input.
6. variable-frequency governor according to claim 5 is characterized in that, said inverter drives signal input part and comprises: go up brachium pontis drive signal end and following brachium pontis drive signal end.
7. a transducer air conditioning is characterized in that, comprising: aforesaid right requires each described variable-frequency governor in 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100287493A CN102624203A (en) | 2011-01-26 | 2011-01-26 | Frequency converter and inverter air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100287493A CN102624203A (en) | 2011-01-26 | 2011-01-26 | Frequency converter and inverter air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102624203A true CN102624203A (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100287493A Pending CN102624203A (en) | 2011-01-26 | 2011-01-26 | Frequency converter and inverter air conditioner |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801352A (en) * | 2012-09-07 | 2012-11-28 | 珠海格力电器股份有限公司 | Power conversion module and frequency conversion air-conditioner |
| CN103940060A (en) * | 2014-04-14 | 2014-07-23 | 美的集团股份有限公司 | Air conditioning system and control method of air conditioning system |
| CN104638879A (en) * | 2013-11-08 | 2015-05-20 | 珠海格力电器股份有限公司 | Frequency converter and air conditioner |
| CN104767417A (en) * | 2015-03-23 | 2015-07-08 | 广东美的制冷设备有限公司 | Control circuit of intelligent power module, intelligent power module and manufacturing method thereof |
| CN104795974A (en) * | 2015-03-23 | 2015-07-22 | 广东美的制冷设备有限公司 | Intelligent power module, control circuit of intelligent power module and manufacturing method of intelligent power module |
| CN104811078A (en) * | 2015-04-28 | 2015-07-29 | 广东美的制冷设备有限公司 | Intelligent power module and air conditioner |
| CN105006988A (en) * | 2015-07-21 | 2015-10-28 | 珠海格力电器股份有限公司 | Inverter circuit having reinforced insulated gate bipolar transistor (IGBT) short-circuit protection function, and air-conditioning system |
| CN106533196A (en) * | 2016-12-16 | 2017-03-22 | 上海三菱电机·上菱空调机电器有限公司 | Frequency conversion circuit with interlaced mode full PAM control mode and deviation inhibition method thereof |
| CN106602915A (en) * | 2016-09-28 | 2017-04-26 | 深圳市盈动力科技有限公司 | Inversion device power limitation circuit and inversion device |
| CN106711953A (en) * | 2016-12-14 | 2017-05-24 | 北京天诚同创电气有限公司 | Protection device and protection method for short-circuiting at direct current side of photovoltaic inverter |
| CN106787795A (en) * | 2016-12-16 | 2017-05-31 | 上海三菱电机·上菱空调机电器有限公司 | The method that a kind of frequency changer circuit and its deviation with interleaving mode suppress |
| CN107437890A (en) * | 2016-05-25 | 2017-12-05 | 松下知识产权经营株式会社 | Power transformation circuit and electrical power transmission system |
| CN110601549A (en) * | 2018-06-13 | 2019-12-20 | 重庆美的制冷设备有限公司 | High-integration intelligent power module and electrical equipment |
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| CN201956968U (en) * | 2011-01-26 | 2011-08-31 | 珠海格力电器股份有限公司 | Frequency conversion speed regulator and frequency conversion air-conditioner |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801352A (en) * | 2012-09-07 | 2012-11-28 | 珠海格力电器股份有限公司 | Power conversion module and frequency conversion air-conditioner |
| CN104638879A (en) * | 2013-11-08 | 2015-05-20 | 珠海格力电器股份有限公司 | Frequency converter and air conditioner |
| CN103940060B (en) * | 2014-04-14 | 2017-01-11 | 美的集团股份有限公司 | Air conditioning system and control method of air conditioning system |
| CN103940060A (en) * | 2014-04-14 | 2014-07-23 | 美的集团股份有限公司 | Air conditioning system and control method of air conditioning system |
| CN104767417A (en) * | 2015-03-23 | 2015-07-08 | 广东美的制冷设备有限公司 | Control circuit of intelligent power module, intelligent power module and manufacturing method thereof |
| CN104795974A (en) * | 2015-03-23 | 2015-07-22 | 广东美的制冷设备有限公司 | Intelligent power module, control circuit of intelligent power module and manufacturing method of intelligent power module |
| CN104767417B (en) * | 2015-03-23 | 2018-10-19 | 广东美的制冷设备有限公司 | Control circuit, intelligent power module and its manufacturing method of intelligent power module |
| CN104811078B (en) * | 2015-04-28 | 2017-08-04 | 广东美的制冷设备有限公司 | SPM and air conditioner |
| CN104811078A (en) * | 2015-04-28 | 2015-07-29 | 广东美的制冷设备有限公司 | Intelligent power module and air conditioner |
| CN105006988A (en) * | 2015-07-21 | 2015-10-28 | 珠海格力电器股份有限公司 | Inverter circuit having reinforced insulated gate bipolar transistor (IGBT) short-circuit protection function, and air-conditioning system |
| CN107437890A (en) * | 2016-05-25 | 2017-12-05 | 松下知识产权经营株式会社 | Power transformation circuit and electrical power transmission system |
| CN107437890B (en) * | 2016-05-25 | 2020-09-01 | 松下知识产权经营株式会社 | Power conversion circuit and power transmission system |
| CN106602915A (en) * | 2016-09-28 | 2017-04-26 | 深圳市盈动力科技有限公司 | Inversion device power limitation circuit and inversion device |
| CN106711953A (en) * | 2016-12-14 | 2017-05-24 | 北京天诚同创电气有限公司 | Protection device and protection method for short-circuiting at direct current side of photovoltaic inverter |
| CN106711953B (en) * | 2016-12-14 | 2020-03-17 | 北京天诚同创电气有限公司 | Photovoltaic inverter direct-current side short-circuit protection device and protection method |
| CN106533196A (en) * | 2016-12-16 | 2017-03-22 | 上海三菱电机·上菱空调机电器有限公司 | Frequency conversion circuit with interlaced mode full PAM control mode and deviation inhibition method thereof |
| CN106787795A (en) * | 2016-12-16 | 2017-05-31 | 上海三菱电机·上菱空调机电器有限公司 | The method that a kind of frequency changer circuit and its deviation with interleaving mode suppress |
| CN106533196B (en) * | 2016-12-16 | 2019-04-30 | 上海三菱电机·上菱空调机电器有限公司 | Frequency changer circuit and its deviation suppressing method with the full PAM control mode of interleaving mode |
| CN110601549A (en) * | 2018-06-13 | 2019-12-20 | 重庆美的制冷设备有限公司 | High-integration intelligent power module and electrical equipment |
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Application publication date: 20120801 |