CN105577020B - SPM and air conditioner - Google Patents

SPM and air conditioner Download PDF

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Publication number
CN105577020B
CN105577020B CN201610131498.4A CN201610131498A CN105577020B CN 105577020 B CN105577020 B CN 105577020B CN 201610131498 A CN201610131498 A CN 201610131498A CN 105577020 B CN105577020 B CN 105577020B
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circuit
input
spm
output
signal
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CN201610131498.4A
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Chinese (zh)
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CN105577020A (en
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冯宇翔
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广东美的制冷设备有限公司
美的集团股份有限公司
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Publication of CN105577020A publication Critical patent/CN105577020A/en
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    • Y02B70/126

Abstract

The invention provides a kind of SPM and air conditioner, the first port for being connected to current detecting end is provided with the HVIC pipes in SPM, the signal output part of PFC drive circuits is additionally provided with HVIC pipes;The input of adaptive circuit is connected to first port, its Enable Pin of the first output end as HVIC pipes;The input of adjustment circuit is connected to the signal output part of PFC drive circuits, its output end is connected to the control terminal of pfc circuit power device, its control terminal is connected to the second output end of adaptive circuit, adjustment circuit is when the control terminal of adjustment circuit inputs the signal of the first level, realize that resistance is less than the resistance characteristic of predetermined resistance, when the control terminal of adjustment circuit inputs the signal of second electrical level, realize that resistance is more than the resistance characteristic of predetermined resistance;Wherein, adaptive circuit exports corresponding level signal by the first output end and the second output end respectively according to the size of the input signal of input.

Description

SPM and air conditioner

Technical field

It is empty in particular to a kind of SPM and one kind the present invention relates to SPM technical field Adjust device.

Background technology

SPM (Intelligent Power Module, abbreviation IPM) is a kind of by power electronics deviding device The analog line driver that part and integrated circuit technique integrate, SPM include device for power switching and high drive Circuit, and with failure detector circuits such as overvoltage, overcurrent and overheats.The logic input terminal of SPM receives master control The control signal of device processed, output end driving compressor or subsequent conditioning circuit work, while the system status signal detected is sent back to Master controller.Relative to traditional discrete scheme, SPM has high integration, high reliability, self-test and protection circuit Etc. advantage, be particularly suitable for the frequency converter of motor and various inverters, be frequency control, metallurgical machinery, electric propulsion, The desired power level electronic device of servo-drive, frequency-conversion domestic electric appliances.

The structural representation of existing Intelligent power module circuit as shown in figure 1, MTRIP ports as current detecting end, To be protected according to the size of current detected to SPM 100.PFCIN ports are as SPM PFC (Power Factor Correction, PFC) control signal.

In the SPM course of work, certain frequency frequent switching between low and high level is pressed at PFCINP ends, is made IGBT pipes 127 are continuously on off state and FRD pipes 131 are continuously in freewheeling state, the frequency be generally LIN1~LIN3, 2~4 times of HIN1~HIN3 switching frequencies, and do not contacted directly with LIN1~LIN3, HIN1~HIN3 switching frequency.

As shown in Fig. 2 UN, VN, WN meet one end of milliohm resistance 138, another the termination GND, MTRIP of milliohm resistance 138 It is current detecting pin, connects one end of milliohm resistance 138, electric current is calculated by the pressure drop for detecting milliohm resistance, as shown in figure 3, When current is excessive, SPM 100 is stopped, avoid after producing overheat because of excessively stream, to SPM 100 Produce permanent damage.

- VP, COM, UN, VN, WN have electrical connection in actual use.Therefore, 121~IGBT of IGBT pipes pipes 127 are opened Current noise when voltage noise during pass and FRD 111~FRD of pipe pipes 116, FRD 131 afterflows of pipe can all intercouple, right The input pin of each low-voltage area impacts.

In each input pin, HIN1~HIN3, LIN1~LIN3, PFCINP threshold value typically in 2.3V or so, and ITRIP threshold voltage typically only has below 0.5V, and therefore, ITRIP is the pin for being most susceptible to interference.When ITRIP by Triggering, SPM 100 will be stopped, and because excessively stream now really occurs, ITRIP now tactile Hair belongs to false triggering.As shown in figure 4, it is high level in PFCIN, when IGBT pipes 127 open moment, because FRD pipes 131 is reverse The presence of restoring current, is superimposed out I131Current waveform, the electric current has larger concussion noise, by-VP, COM, UN, VN, Electrical connections of the WN in peripheral circuit, concussion noise close out certain voltage in MTRIP ends meeting lotus root and raised.If trigger MTRIP Condition be:Voltage>Vth, and duration>Tth;In Fig. 4, if Ta<Tth<Tb is then too high in the voltage in first three cycle It is insufficient to allow MTRIP to produce false triggering, to the 4th cycle, MTRIP will produce false triggering.

In fact, because the reverse recovery time of FRD pipes and reverse recovery current are positive temperature coefficients, temperature is higher, instead It is longer to recovery time, therefore as the continuous firing of system, the constant temperature of SPM 100 rise, MTRIP is touched The probability of hair is increasing.As shown in figure 5, when IGBT slope tf when opening is smaller, FRD Reverse recovery effect causes Voltage pulsation be not enough to cause MTRIP to trigger, and when IGBT slope tf when opening is larger, MTRIP is triggered, make be System is stopped.Although this false triggering can recover over time without to system formed destroy, undoubtedly can to Cause to perplex in family.Such as pursue energy-conservation for the application scenario of transducer air conditioning, user and wish PFC continuous firings, MTRIP is by by mistake The chance of triggering is multiplied, once MTRIP, by false triggering, air-conditioning system can be because being mistakenly considered to be stopped 3~5 excessively stream occurs Minute, user can not be during this period of time obtained cold wind, this is to cause air-conditioning system because refrigerating capacity deficiency is by customer complaint One of the main reason for.The work of pfc circuit it is not necessary to, inconsiderate occasion is connected up in some application circuits, it is existing In the case that the SPM of technology will not automatically adjust pfc circuit working condition, SPM is undoubtedly improved Use threshold, have impact on the popularization of SPM.

Therefore, the adaptability of SPM how is improved, with the wiring grommet by voluntarily judging application circuit Border, to adjust the working condition of pfc circuit, realize that the reliability that SPM is improved while guaranteed efficiency turns into urgently Technical problem to be solved.

The content of the invention

It is contemplated that at least solves one of technical problem present in prior art or correlation technique.

Therefore, it is an object of the present invention to propose a kind of new SPM, can be by voluntarily judging The wiring environment of application circuit adjusts the working condition of pfc circuit, realizes intelligent work(is improved while guaranteed efficiency The adaptability and reliability of rate module.

It is another object of the present invention to propose a kind of air conditioner.

To achieve the above object, embodiment according to the first aspect of the invention, it is proposed that a kind of SPM, bag Include:Bridge arm signal input part, three-phase low reference voltage end and current detecting end under bridge arm signal input part, three-phase on three-phase; HVIC (High Voltage Integrated Circuit, high voltage integrated circuit) is managed, and is provided with the HVIC pipes and is connected respectively The terminals of bridge arm signal input part under bridge arm signal input part and the three-phase on the three-phase are connected to, and are connected to described The first port at current detecting end, the signal output part of PFC drive circuits is additionally provided with the HVIC pipes;Sampling resistor, institute State three-phase low reference voltage end and the current detecting end and be connected to the first end of the sampling resistor, the sampling resistor Second end is connected to the low-pressure area power supply negative terminal of the SPM;Adaptive circuit, the adaptive circuit Input is connected to the first port, the Enable Pin of the first output end of the adaptive circuit as the HVIC pipes;Adjust Whole circuit, the input of the adjustment circuit are connected to the signal output part of the PFC drive circuits, the adjustment circuit it is defeated Go out the control terminal that end is connected to pfc circuit power device, the control terminal of the adjustment circuit is connected to the adaptive circuit Second output end, the adjustment circuit realize that resistance is small when the control terminal of the adjustment circuit inputs the signal of the first level In the resistance characteristic of predetermined resistance, when the control terminal of the adjustment circuit inputs the signal of second electrical level, realize that resistance is more than The resistance characteristic of the predetermined resistance;

Wherein, the adaptive circuit is defeated by described first respectively according to the size of the input signal of the input Go out end and the second output end exports corresponding level signal.

SPM according to an embodiment of the invention, adaptive circuit pass through according to its input (i.e. first end Mouthful, namely current detecting end) input signal size, the enable signal of corresponding level is exported by its first output end, can To ensure that SPM realizes overcurrent protection;Meanwhile by the size of the input signal according to its input, by its Two output ends export corresponding level signal so that SPM can determine to apply according to the input signal of its input The wiring environment of circuit, and then control adjustment circuit to realize that resistance is less than the resistance characteristic of predetermined resistance or it is pre- to realize that resistance is more than Determine the resistance characteristic of resistance, with the switching speed of indirect control pfc circuit power device, ensure system high efficiency rate so as to realize The reliability of SPM is improved while work, the input signal avoided in the input of adaptive circuit is larger When, pfc circuit power device is still controlled so that larger switching speed is operated and influences the stability of SPM.

SPM according to the abovementioned embodiments of the present invention, there can also be following technical characteristic:

According to one embodiment of present invention, the adaptive circuit is less than the in the value of the input signal of the input During one setting value, the signal of first level is exported by first output end, to allow the HVIC pipes to work, and is led to Cross the signal that second output end exports first level;

The adaptive circuit is more than or equal to first setting value and small in the value of the input signal of the input When the second setting value, the signal of first level is exported by first output end, and passes through second output end Export the signal of the second electrical level;

The adaptive circuit leads to when the value of the input signal of the input is more than or equal to second setting value The signal of the first output end output second electrical level is crossed, to forbid the HVIC pipes to work, and passes through second output end Export the signal of the second electrical level.

SPM according to an embodiment of the invention, when the value of the input signal of the input of adaptive circuit is small When the first setting value, illustrate that the current value in the application circuit of SPM is in normal range (NR), therefore can lead to The signal that the first output end exports the first level is crossed, to allow HVIC pipes to work;Pass through the electricity of the second output end output first simultaneously Flat signal, adjustment circuit can be made to realize that resistance is less than the resistance characteristic of predetermined resistance, with indirect control pfc circuit power device Part has larger switching speed, to ensure that system has higher efficiency.

When the value of the input signal of the input of adaptive circuit is more than or equal to first setting value and less than second During setting value, illustrate that the current value in the application circuit of SPM is larger, but still in overcurrent protection need not be triggered In the range of, therefore the signal of the first level can be exported by the first output end, to ensure that HVIC pipes work on;Pass through simultaneously Second output end exports the signal of second electrical level, and adjustment circuit can be made to realize that resistance is more than the resistance characteristic of predetermined resistance, with Indirect control pfc circuit power device has less switching speed, and then can reduce voltage noise to SPM The interference of overcurrent protection is carried out, improves the stability of SPM.

When the value of the input signal of the input of adaptive circuit is more than or equal to the second setting value, illustrate intelligent power Current value in the application circuit of module has reached the scope of triggering overcurrent protection, therefore can export the by the first output end The enable signal of two level, to forbid HVIC pipes to work, it is ensured that the security of SPM.

According to one embodiment of present invention, the adaptive circuit includes:

First voltage comparator, the input of the positive input terminal of the first voltage comparator as the adaptive circuit End, the negative input end of the first voltage comparator are connected to the positive pole of first voltage source, and the negative pole of the first voltage source connects The power supply negative pole of the adaptive circuit is connected to, the output end of the first voltage comparator is connected to the first NAND gate The input of first input end and the first NOT gate, the output end of first NOT gate is connected to the input of the second NOT gate, described Second output end of the output end of second NOT gate as the adaptive circuit;

Second voltage comparator, the positive input terminal of the second voltage comparator are connected to the first voltage comparator Positive input terminal, the negative input end of the second voltage comparator are connected to the positive pole of the second voltage source, the second voltage source Negative pole is connected to the power supply negative pole of the adaptive circuit, and the output end of the second voltage comparator is connected to described Second input of one NAND gate, the output end of first NAND gate are connected to the input of the 3rd NOT gate, and the described 3rd is non- First output end of the output end of door as the adaptive circuit;

Wherein, the power supply positive pole of the adaptive circuit and negative pole are connected respectively to the SPM Low-pressure area power supply anode and negative terminal.

According to one embodiment of present invention, the adjustment circuit includes:Analog switch, the fixing end of the analog switch As the input of the adjustment circuit, the control terminal of the control terminal of the analog switch as the adjustment circuit;First electricity Resistance, the first end of the first resistor are connected to the first choice end of the analog switch and the anode of the first diode;Second Resistance, the first end of the second resistance are connected to the second selection end of the analog switch, the second end of the second resistance It is connected and as the output end of the adjustment circuit with the second end of the first resistor and the negative electrode of first diode.

According to one embodiment of present invention, the pfc circuit power device is the first power switch pipe, first work( Control terminal of the base stage of rate switching tube as the pfc circuit power device, the SPM also include:Two or two pole Pipe, the anode of second diode are connected to the emitter stage of first power switch pipe, the negative electrode of second diode The colelctor electrode of first power switch pipe is connected to, the colelctor electrode of first power switch pipe is connected to the 3rd diode Anode, the negative electrode of the 3rd diode are connected to the high voltage input of the SPM, and first power is opened Close PFC low reference voltage end of the emitter stage of pipe as the SPM, the colelctor electrode of first power switch pipe PFC ends as the SPM.

Wherein, the first power switch pipe can be IGBT (Insulated Gate Bipolar Transistor, insulation Grid bipolar transistor).

According to one embodiment of present invention, in addition to:Boostrap circuit, the boostrap circuit include:First two poles of bootstrapping Pipe, the anode of first bootstrap diode are connected to the low-pressure area power supply anode of the SPM, and described the The negative electrode of one bootstrap diode is connected to the U phases higher-pressure region power supply anode of the SPM;Second two poles of bootstrapping Pipe, the anode of second bootstrap diode are connected to the low-pressure area power supply anode of the SPM, and described the The negative electrode of two bootstrap diodes is connected to the V phases higher-pressure region power supply anode of the SPM;3rd two poles of bootstrapping Pipe, the anode of the 3rd bootstrap diode are connected to the low-pressure area power supply anode of the SPM, and described the The negative electrode of three bootstrap diodes is connected to the W phases higher-pressure region power supply anode of the SPM.

According to one embodiment of present invention, in addition to:Bridge arm circuit on three-phase, it is every in bridge arm circuit on the three-phase The input of bridge arm circuit is connected to the signal output part that phase is corresponded in the three-phase high-voltage area of the HVIC pipes in one phase;Under three-phase Bridge arm circuit, the input of bridge arm circuit is connected to the three-phase of the HVIC pipes under each phase under the three-phase in bridge arm circuit The signal output part of phase is corresponded in low-pressure area.

Wherein, bridge arm circuit includes on three-phase:Bridge arm circuit in U phases, bridge arm circuit in V phases, bridge arm circuit in W phases;Three Bridge arm circuit includes under phase:Bridge arm circuit under bridge arm circuit, W phases under bridge arm circuit, V phases under U phases.

According to one embodiment of present invention, bridge arm circuit includes in each phase:Second power switch pipe and the 4th Diode, the anode of the 4th diode are connected to the emitter stage of second power switch pipe, the 4th diode Negative electrode is connected to the colelctor electrode of second power switch pipe, and the colelctor electrode of second power switch pipe is connected to the intelligence The high voltage input of power model, the input of the base stage of second power switch pipe as bridge arm circuit in each phase End, the emitter stage of second power switch pipe, which is connected to the SPM and corresponds to the higher-pressure region power supply of phase, to be born End.Wherein, the second power switch pipe can be IGBT.

According to one embodiment of present invention, bridge arm circuit includes under each phase:3rd power switch pipe and the 5th Diode, the anode of the 5th diode are connected to the emitter stage of the 3rd power switch pipe, the 5th diode Negative electrode is connected to the colelctor electrode of the 3rd power switch pipe, and the colelctor electrode of the 3rd power switch pipe is connected on corresponding The anode of the 4th diode in bridge arm circuit, the base stage of the 3rd power switch pipe is as bridge arm under each phase The input of circuit, the emitter stage of the 3rd power switch pipe are joined as the low-voltage of the corresponding phase of the SPM Examine end.Wherein, the 3rd power switch pipe can be IGBT.

According to one embodiment of present invention, the voltage of the high voltage input of the SPM is 300V.

According to one embodiment of present invention, the anode of each phase higher-pressure region power supply of the SPM and Filter capacitor is connected between negative terminal.

Embodiment according to a second aspect of the present invention, it is also proposed that a kind of air conditioner, including:Any one embodiment as described above Described in SPM.

The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obtain substantially, or recognized by the practice of the present invention.

Brief description of the drawings

The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment Substantially and it is readily appreciated that, wherein:

Fig. 1 shows the structural representation of the SPM in correlation technique;

Fig. 2 shows the external circuit schematic diagram of SPM;

Fig. 3 shows the waveform diagram that current signal triggering SPM is stopped;

Fig. 4 shows a kind of waveform diagram of noise caused by SPM in correlation technique;

Fig. 5 shows another waveform diagram of noise caused by SPM in correlation technique;

Fig. 6 shows the structural representation of SPM according to an embodiment of the invention;

Fig. 7 shows the internal structure schematic diagram of adaptive circuit according to an embodiment of the invention;

Fig. 8 shows the internal structure schematic diagram of adjustment circuit according to an embodiment of the invention.

Embodiment

It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention Mode is applied the present invention is further described in detail.It should be noted that in the case where not conflicting, the implementation of the application Feature in example and embodiment can be mutually combined.

Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also To be different from other modes described here using other to implement, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.

Fig. 6 shows the structural representation of SPM according to an embodiment of the invention.

As shown in fig. 6, SPM according to an embodiment of the invention, including:HVIC pipes 1101 and adaptive electricity Road 1105.

The VCC ends of HVIC pipes 1101 are general as low-pressure area power supply the anode VDD, VDD of SPM 1100 For 15V;

Inside HVIC pipes 1101:

ITRIP ends connect the input of adaptive circuit 1105;The power supply of VCC ends connection adaptive circuit 1105 is just End;GND ends connect the power supply negative terminal of adaptive circuit 1105;First output end of adaptive circuit 1105 is designated as ICON, For controlling the validity of HIN1~HIN3, LIN1~LIN3, PFCINP signals;Second output end of adaptive circuit 1105 is made For the PFCC ends of HVIC pipes 1101.

The inside of HVIC pipes 1101 also has boostrap circuit structure as follows:

VCC ends are connected with the anode of bootstrap diode 1102, bootstrap diode 1103, bootstrap diode 1104;Bootstrapping two The negative electrode of pole pipe 1102 is connected with the VB1 of HVIC pipes 1101;The VB2 phases of the negative electrode of bootstrap diode 1103 and HVIC pipes 1101 Even;The negative electrode of bootstrap diode 1104 is connected with the VB3 of HVIC pipes 1101.

The HIN1 ends of HVIC pipes 1101 are bridge arm signal input part UHIN in the U phases of SPM 1100;HVIC is managed 1101 HIN2 ends are bridge arm signal input part VHIN in the V phases of SPM 1100;The HIN3 ends of HVIC pipes 1101 are Bridge arm signal input part WHIN in the W phases of SPM 1100;The LIN1 ends of HVIC pipes 1101 are SPM Bridge arm signal input part ULIN under 1100 U phases;The LIN2 ends of HVIC pipes 1101 are bridge arm under the V phases of SPM 1100 Signal input part VLIN;The LIN3 ends of HVIC pipes 1101 are bridge arm signal input part WLIN under the W phases of SPM 1100; The ITRIP ends of HVIC pipes 1101 are the MTRIP ends of SPM 1100;The PFCINP ends of HVIC pipes 1101 are as intelligent work( The PFC control signals PFCIN of rate module 100;The GND ends of HVIC pipes 1101 supply as the low-pressure area of SPM 1100 Electric power supply negative terminal COM.Wherein, SPM 1100 the tunnel of UHIN, VHIN, WHIN, ULIN, VLIN, WLIN six input and PFCIN ends receive 0V or 5V input signal.

One end of the VB1 ends connection electric capacity 1131 of HVIC pipes 1101, and as the U phases higher-pressure region of SPM 1100 Power supply anode UVB;The HO1 ends of HVIC pipes 1101 are connected with the grid of bridge arm IGBT pipes 1121 in U phases;HVIC pipes 1101 VS1 ends and colelctor electrode, the FRD pipes 1114 of bridge arm IGBT pipes 1124 under the emitter-base bandgap grading of IGBT pipes 1121, the anode of FRD pipes 1111, U phases Negative electrode, the other end of electric capacity 1131 be connected, and as the U phases higher-pressure region power supply negative terminal UVS of SPM 1100.

One end of the VB2 ends connection electric capacity 1132 of HVIC pipes 1101, and as the V phases higher-pressure region of SPM 1100 Power supply anode VVB;The HO2 ends of HVIC pipes 1101 are connected with the grid of bridge arm IGBT pipes 1123 in V phases;HVIC pipes 1101 VS2 ends and colelctor electrode, the FRD pipes 1115 of bridge arm IGBT pipes 1125 under the emitter-base bandgap grading of IGBT pipes 1122, the anode of FRD pipes 1112, V phases Negative electrode, the other end of electric capacity 1132 be connected, and as the V phases higher-pressure region power supply negative terminal VVS of SPM 1100.

One end of the VB3 ends connection electric capacity 1133 of HVIC pipes 1101, the W phases higher-pressure region as SPM 1100 supplies Electric power positive end WVB;The HO3 ends of HVIC pipes 1101 are connected with the grid of bridge arm IGBT pipes 1123 in W phases;HVIC pipes 1101 VS3 ends and colelctor electrode, the FRD pipes 1116 of bridge arm IGBT pipes 1126 under the emitter-base bandgap grading of IGBT pipes 1123, the anode of FRD pipes 1113, W phases Negative electrode, the other end of electric capacity 1133 be connected, and as the W phases higher-pressure region power supply negative terminal WVS of SPM 1100.

The LO1 ends of HVIC pipes 1101 are connected with the grid of IGBT pipes 1124;The LO2 ends of HVIC pipes 1101 and IGBT pipes 1125 Grid be connected;The LO3 ends of HVIC pipes 1101 are connected with the grid of IGBT pipes 1126;The emitter-base bandgap grading of IGBT pipes 1124 is managed with FRD 1114 anode is connected, and as the U phase low reference voltages end UN of SPM 1100;The emitter-base bandgap grading of IGBT pipes 1125 with The anode of FRD pipes 1115 is connected, and as the V phase low reference voltages end VN of SPM 1100;IGBT pipes 1126 are penetrated Pole is connected with the anode of FRD pipes 1116, and as the W phase low reference voltages end WN of SPM 1100.

VDD is the power supply anode of HVIC pipes 1101, and GND is the power supply negative terminal of HVIC pipes 1101;VDD-GND voltages Generally 15V;VB1 and VS1 is respectively the positive pole and negative pole of the power supply of U phases higher-pressure region, and HO1 is the output end of U phases higher-pressure region; VB2 and VS2 is respectively the positive pole and negative pole of the power supply of V phases higher-pressure region, and HO2 is the output end of V phases higher-pressure region;VB3 and VS3 difference For the positive pole and negative pole of the power supply of U phases higher-pressure region, HO3 is the output end of W phases higher-pressure region;LO1, LO2, LO3 are respectively U phases, V The output end of phase, W phase low-pressure areas.

The PFCO ends of HVIC pipes 1101 are connected with the input of adjustment circuit 1141, the output end of adjustment circuit 1141 with The grid of IGBT pipes 1127 is connected, and the PFCC ends of HVIC pipes 1101 are connected with the control terminal of adjustment circuit 1141;IGBT pipes 1127 Emitter-base bandgap grading be connected with the anode of FRD pipes 1117, and as the PFC low reference voltages end-VP of SPM 1100;IGBT is managed 1127 colelctor electrode is connected with the negative electrode of FRD pipes 1117, the anode of FRD pipes 1151, and as the PFC of SPM 1100 End.

The negative electrode of FRD pipes 1151, the colelctor electrode of IGBT pipes 1121, the negative electrode of FRD pipes 1111, the current collection of IGBT pipes 1122 Pole, the negative electrode of FRD pipes 1112, the colelctor electrode of IGBT pipes 1123, the negative electrode of FRD pipes 1113 are connected, and are used as SPM 1100 high voltage input P, P typically meets 300V.

The effect of HVIC pipes 1101 is:

When ICON is low level, the 0 of input HIN1, HIN2, HIN3 or 5V logic input signal are passed to respectively Output end HO1, HO2, HO3, LIN1, LIN2, LIN3 signal are passed into output end LO1, LO2, LO3 respectively, by PFCINP's Signal passes to output end PFCO, and wherein HO1 is that VS1 or VS1+15V logic output signal, HO2 are patrolling for VS2 or VS2+15V Volume output signal, HO3 are VS3 or VS3+15V logic output signal, and LO1, LO2, LO3, PFCO are 0 or 15V logic output Signal;

When ICON is high level, HO1, HO2, HO3, LO1, LO2, LO3, PFCO are all set to low level.

The effect of adaptive circuit 1105 is:

When the real time value for detecting ITRIP is less than a certain particular voltage level V1, ICON output low levels, and it is adaptive The second output end of circuit 1105 is answered to export low level;

When the real time value for detecting ITRIP is less than a certain particular voltage level V2 more than V1, ICON output low levels, And the second output end output high level of adaptive circuit 1105;

When the real time value for detecting ITRIP is more than V2, ICON output high level, and the of adaptive circuit 1105 Two output ends export high level;Here, V2>V1;

As described above, control signals of the ICON as HVIC pipes 1101, when ICON is low level, HVIC pipes 1101 start Work, when ICON is high level, HVIC pipes 1101 are stopped.

The effect of adjustment circuit 1141 is:

When the control terminal of adjustment circuit 1141 is low level, realized between the input and output end of adjustment circuit 1141 The less resistance characteristic of resistance;

When the control terminal of adjustment circuit 1141 is high level, realized between the input and output end of adjustment circuit 1141 The larger resistance characteristic of resistance;

I.e.:When the control terminal of adjustment circuit 1141 is low level, the switching speed of IGBT pipes 1127 is very fast, when adjustment electricity When the control terminal on road 1141 is high level, the switching speed of IGBT pipes 1127 is slower.

In one embodiment of the invention, the particular circuit configurations of adaptive circuit 1105 are as shown in fig. 7, be specially:

ITRIP connects the positive input terminal of voltage comparator 2010, the positive input terminal of voltage comparator 2014;Voltage comparator The anode of 2010 negative input termination voltage source 2018;The negative terminal of voltage source 2018 meets GND;The negative input of voltage comparator 2014 The anode in termination voltage source 2019;The negative terminal of voltage source 2019 meets GND;

The input of the one of input and NOT gate 2012 of the output termination NAND gate 2011 of voltage comparator 2010; The input of the output termination NOT gate 2013 of NOT gate 2012;The output end of NOT gate 2013 is the second defeated of adaptive circuit 1105 Go out end;

Another input of the output termination NAND gate 2011 of voltage comparator 2014;The output termination of NAND gate 2011 The input of NOT gate 2016;The output end of NOT gate 2016 is the ICON ends of adaptive circuit 1105.

The internal structure of adjustment circuit 1141 is as shown in figure 8, be specially:

The fixing end of the input termination analog switch 2021 of adjustment circuit 1141;The control terminal of analog switch 2021 is to adjust The control terminal of whole circuit 1141;The anode of 0 selection terminating diode 2015 of analog switch 2021 and one end of resistance 2017;Mould Intend one end of 1 selection terminating resistor 2020 of switch 2021;The negative electrode of diode 2015 and the other end, the resistance of resistance 2017 2020 other end is connected and is used as the output end of adjustment circuit 1141.

Illustrate the operation principle and key parameter value of above-described embodiment below:Voltage source 2018 is it is contemplated that be designed as 0.5V, voltage source 2019 is it is contemplated that be designed as 0.6V;

On the basis of above-mentioned parameter, SPM proposed by the present invention is in real work it is possible that following Situation:

Situation 1:When ITRIP voltages<During 0.5V, voltage comparator 2010 exports low level, so as to adaptive circuit 1105 The second output end output low level, and NAND gate 2011 export high level, so as to NOT gate 2016 export low level make ICON Export low level.Because the second output end output low level of adaptive circuit 1105, the control terminal of adjustment circuit 1141 It is resistance 2017 and the combination in parallel of diode 2015 between the input and output end of adjustment circuit 1141 for low level;Electricity Resistance 2017 is the less resistance of resistance, it may be considered that is designed as 10 Ω, diode 2015 is pressure-resistant more than 20V, 1A electric currents The diode of ability, when controlling IGBT pipes 1127 to open, resistance is almost 0, obtains speed of opening as fast as possible, drop Low turn-on consumption, when controlling IGBT pipes 1127 to turn off, resistance is 10 Ω, obtains faster turn-off speed, control shut-off Loss;

Situation 2:When ITRIP voltages>During 0.6V, voltage comparator 2010 exports high level, also, voltage comparator 2014 High level is exported, NAND gate 2011 exports low level, ICON is exported high level, intelligent work(so as to which NOT gate 2016 exports high level Rate module 1100 is stopped into guard mode;

Situation 3:Work as 0.5V<ITIRP voltages<During 0.6V, voltage comparator 2010 exports high level, so as to adaptive circuit 1105 the second output end output high level;And voltage comparator 2014 exports low level, the output end of NAND gate 2011 is high Level, ICON is set to export low level so as to which NOT gate 2016 exports low level.Because the second output end of adaptive circuit 1105 is defeated Go out high level, so the control terminal of adjustment circuit 1141 is high level, be between the input and output end of adjustment circuit 1141 Resistance 2020, resistance 2020 are the larger resistance of a resistance, it may be considered that are designed as 50 Ω;When control IGBT pipes 1127 are open-minded When, resistance is almost 50 Ω, obtains slower speed of opening, and turn-on consumption increases but can reduce the voltage of circuit and makes an uproar Sound, when controlling IGBT pipes 1127 to turn off, resistance is 50 Ω, obtains slower turn-off speed, further reduces circuit and makes an uproar Sound, maintain system stable.

From the technical scheme of above-described embodiment, SPM proposed by the present invention and existing SPM It is completely compatible, directly it can be replaced with existing SPM.ITRIP first with relatively low voltage ratio compared with, it is ensured that To on the premise of the sensitivity of SPM overcurrent protection, by adjust the switching speed of the IGBT pipes in pfc circuit come Voltage noise is reduced, to take into account the stability of SPM work;And when ITRIP is higher than a higher voltage, it is Ensure the safety of SPM and stop SPM work;So that the SPM of the present invention is normal On the premise of protection mechanism persistently comes into force, the stability, availability, robustness of system are maintained, improving the user of product expires Meaning degree.

Technical scheme is described in detail above in association with accompanying drawing, the present invention proposes a kind of new intelligent power mould Block, the working condition of pfc circuit can be adjusted by voluntarily judging the wiring environment of application circuit, realized in guaranteed efficiency While improve the adaptability and reliability of SPM.

The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should be included in the scope of the protection.

Claims (9)

  1. A kind of 1. SPM, it is characterised in that including:
    Bridge arm signal input part, three-phase low reference voltage end and current detecting end under bridge arm signal input part, three-phase on three-phase;
    HVIC is managed, and is provided with the HVIC pipes and is respectively connecting on the three-phase bridge under bridge arm signal input part and the three-phase The terminals of arm signal input part, and the first port at the current detecting end is connected to, it is additionally provided with the HVIC pipes The signal output part of PFC drive circuits;
    Sampling resistor, the three-phase low reference voltage end and the current detecting end are connected to the first of the sampling resistor End, the second end of the sampling resistor is connected to the low-pressure area power supply negative terminal of the SPM;
    Adaptive circuit, the input of the adaptive circuit are connected to the first port, and the first of the adaptive circuit Enable Pin of the output end as the HVIC pipes;
    Adjustment circuit, the input of the adjustment circuit are connected to the signal output part of the PFC drive circuits, the adjustment electricity The output end on road is connected to the control terminal of pfc circuit power device, and the control terminal of the adjustment circuit is connected to described adaptive Second output end of circuit, the adjustment circuit are realized when the control terminal of the adjustment circuit inputs the signal of the first level Resistance is less than the resistance characteristic of predetermined resistance, when the control terminal of the adjustment circuit inputs the signal of second electrical level, realizes resistance Resistance characteristic of the value more than the predetermined resistance;
    Wherein, the adaptive circuit passes through first output end respectively according to the size of the input signal of the input Corresponding level signal is exported with the second output end;
    The adaptive circuit exports when the value of the input signal of the input is less than the first setting value by described first End exports the signal of first level, to allow the HVIC pipes to work, and exports described the by second output end The signal of one level;
    The adaptive circuit is more than or equal to first setting value and less than the in the value of the input signal of the input During two setting values, the signal of first level is exported by first output end, and export by second output end The signal of the second electrical level;
    The adaptive circuit passes through institute when the value of the input signal of the input is more than or equal to second setting value The signal of the first output end output second electrical level is stated, to forbid the HVIC pipes to work, and is exported by second output end The signal of the second electrical level.
  2. 2. SPM according to claim 1, it is characterised in that the adaptive circuit includes:
    First voltage comparator, the input of the positive input terminal of the first voltage comparator as the adaptive circuit, institute The negative input end for stating first voltage comparator is connected to the positive pole of first voltage source, and the negative pole of the first voltage source is connected to institute State the power supply negative pole of adaptive circuit, it is first defeated to be connected to the first NAND gate for the output end of the first voltage comparator Enter the input of end and the first NOT gate, the output end of first NOT gate is connected to the input of the second NOT gate, and described second is non- Second output end of the output end of door as the adaptive circuit;
    Second voltage comparator, the positive input terminal of the second voltage comparator are connected to the just defeated of the first voltage comparator Enter end, the negative input end of the second voltage comparator is connected to the positive pole of the second voltage source, the negative pole of the second voltage source Be connected to the power supply negative pole of the adaptive circuit, the output end of the second voltage comparator be connected to described first with Second input of NOT gate, the output end of first NAND gate are connected to the input of the 3rd NOT gate, the 3rd NOT gate First output end of the output end as the adaptive circuit;
    Wherein, the power supply positive pole of the adaptive circuit and negative pole are connected respectively low to the SPM Nip power supply anode and negative terminal.
  3. 3. SPM according to claim 1, it is characterised in that the adjustment circuit includes:
    Analog switch, the input of the fixing end of the analog switch as the adjustment circuit, the control of the analog switch Hold the control terminal as the adjustment circuit;
    First resistor, the first end of the first resistor are connected to first choice end and the first diode of the analog switch Anode;
    Second resistance, the first end of the second resistance are connected to the second selection end of the analog switch, the second resistance The second end be connected and as the adjustment circuit with the second end of the first resistor and the negative electrode of first diode Output end.
  4. 4. SPM according to claim 1, it is characterised in that the pfc circuit power device is the first work( Rate switching tube, the control terminal of the base stage of first power switch pipe as the pfc circuit power device, the intelligent power Module also includes:
    Second diode, the anode of second diode are connected to the emitter stage of first power switch pipe, and described second The negative electrode of diode is connected to the colelctor electrode of first power switch pipe, and the colelctor electrode of first power switch pipe is connected to The anode of 3rd diode, the negative electrode of the 3rd diode are connected to the high voltage input of the SPM, institute PFC low reference voltage end of the emitter stage as the SPM of the first power switch pipe is stated, first power is opened Close PFC end of the colelctor electrode of pipe as the SPM.
  5. 5. SPM according to any one of claim 1 to 4, it is characterised in that also include:Boostrap circuit, The boostrap circuit includes:
    First bootstrap diode, the anode of first bootstrap diode are connected to the low-pressure area power supply of the SPM Power positive end, the negative electrode of first bootstrap diode are being connected to the U phases higher-pressure region power supply of the SPM just End;
    Second bootstrap diode, the anode of second bootstrap diode are connected to the low-pressure area power supply of the SPM Power positive end, the negative electrode of second bootstrap diode are being connected to the V phases higher-pressure region power supply of the SPM just End;
    3rd bootstrap diode, the anode of the 3rd bootstrap diode are connected to the low-pressure area power supply of the SPM Power positive end, the negative electrode of the 3rd bootstrap diode are being connected to the W phases higher-pressure region power supply of the SPM just End.
  6. 6. SPM according to any one of claim 1 to 4, it is characterised in that also include:
    Bridge arm circuit on three-phase, the input of bridge arm circuit is connected to described in each phase on the three-phase in bridge arm circuit The signal output part of phase is corresponded in the three-phase high-voltage area of HVIC pipes;
    Bridge arm circuit under three-phase, the input of bridge arm circuit is connected to described under each phase under the three-phase in bridge arm circuit The signal output part of phase is corresponded in the three-phase low-voltage area of HVIC pipes.
  7. 7. SPM according to claim 6, it is characterised in that bridge arm circuit includes in each phase:
    Second power switch pipe and the 4th diode, the anode of the 4th diode are connected to second power switch pipe Emitter stage, the negative electrode of the 4th diode are connected to the colelctor electrode of second power switch pipe, second power switch The colelctor electrode of pipe is connected to the high voltage input of the SPM, and the base stage of second power switch pipe is as institute The input of bridge arm circuit in each phase is stated, the emitter stage of second power switch pipe is connected to the SPM pair Answer the higher-pressure region power supply negative terminal of phase.
  8. 8. SPM according to claim 7, it is characterised in that bridge arm circuit includes under each phase:
    3rd power switch pipe and the 5th diode, the anode of the 5th diode are connected to the 3rd power switch pipe Emitter stage, the negative electrode of the 5th diode are connected to the colelctor electrode of the 3rd power switch pipe, the 3rd power switch The colelctor electrode of pipe is connected to the anode of the 4th diode in corresponding upper bridge arm circuit, the 3rd power switch pipe Input of the base stage as bridge arm circuit under each phase, the emitter stage of the 3rd power switch pipe is as the intelligent work( The low reference voltage end of the corresponding phase of rate module.
  9. A kind of 9. air conditioner, it is characterised in that including:SPM as any one of claim 1 to 8.
CN201610131498.4A 2016-03-08 2016-03-08 SPM and air conditioner CN105577020B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201610131498.4A CN105577020B (en) 2016-03-08 2016-03-08 SPM and air conditioner

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CN106253732A (en) * 2016-08-19 2016-12-21 广东美的制冷设备有限公司 SPM, power electronic equipment and air-conditioner

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EP1551097A1 (en) * 2003-12-31 2005-07-06 STMicroelectronics S.r.l. Power conversion device with synchronous rectifier driving and voltage oscillation limitation during a discontinuous operating mode
US8044674B2 (en) * 2009-11-06 2011-10-25 Infineon Technologies Ag Semiconductor device with thermal fault detection
CN105322822B (en) * 2015-11-30 2017-12-19 重庆美的制冷设备有限公司 SPM and air conditioner
CN105356785B (en) * 2015-11-30 2017-12-12 重庆美的制冷设备有限公司 SPM and air conditioner
CN205453542U (en) * 2016-03-08 2016-08-10 广东美的制冷设备有限公司 Intelligence power module and air conditioner

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