CN101488700A - Inverter and refrigeration cycle device - Google Patents
Inverter and refrigeration cycle device Download PDFInfo
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- CN101488700A CN101488700A CNA2008101700674A CN200810170067A CN101488700A CN 101488700 A CN101488700 A CN 101488700A CN A2008101700674 A CNA2008101700674 A CN A2008101700674A CN 200810170067 A CN200810170067 A CN 200810170067A CN 101488700 A CN101488700 A CN 101488700A
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Abstract
The invention provides a transformer and a refrigeration cycle device with good safety, in case a resistance is broken in current detection, damage of a switch element and a drive circuit is prevented. A current sensing resistance (21) is inserted into DC voltage supply lines (L1, L2) aiming at a switching circuit (10). Moreover, a protective resistance (22) is connected in parallel with the current sensing resistance (21). The protective resistance (22) has larger resistance than the current sensing resistance (21). According to the current flowing to the resistances (21, 22), each switching element of the switching circuit (10) is turned on and deadline-driven.
Description
Cross reference to related application:
The present invention advocates priority based on the 2007-No. 274161 Japanese patent application of filing an application on October 22nd, 2007 and to it, and the full content of this former patent application is contained in this by reference.
Technical field
The present invention relates to a kind of motor driven with converter and have the freezing cycle device of this converter.
Background technology
Motor driven has the switching circuit that direct voltage is converted to interchange and output with converter.This switching circuit has the series circuit of two heterogeneous switch elements, and the interlinkage of two switch elements in these series circuits connects each phase winding of motor.Come each switch element is carried out conducting, ends driving each phase winding of current direction motor, the rotor rotation of motor by apply direct voltage to this switching circuit.
When carrying out the driving of this converter, detect the electric current of each phase winding flow to motor, the vector control by detecting electric current based on this etc. generate the conducting of each switch element relatively, by the pwm signal that drives usefulness.Flow to the unit of the electric current of each phase winding as detection, for example on the direct voltage supply line of switching circuit relatively, resistor is set, detect the voltage that results from this resistor.And, also having connects on the direct voltage supply line is provided with two resistors, as current detecting, the opposing party's resistor generates heat voluntarily when being used as overcurrent and flowing through and fuses so that the example that a side resistor does not fuse (for example No. 2621075 communiques of Japan Patent) a side resistor.
As mentioned above; on the minus side line that direct voltage is supplied with, connect and be provided with in the example of two resistors; fuse/when blocking, be cut off between switch element and the drive circuit thereof owing to overcurrent etc. with resistor in protection, the current potential of switch element and drive circuit becomes uncertain.Therefore, in the conducting of switch element, when drive signal is low level (between the off period), become the current potential state higher of the electric current outflow side terminal of this switch element than the current potential of driving signal input son, apply bigger back voltage from the electric current outflow side terminal of switch element to driving signal input, might cause damaging above the contrary withstand voltage of switch element.When this damages, otherwise driving signal input by switch element applies high voltage to drive circuit sometimes, if the drive circuit side is withstand voltage lower, then causes drive circuit to damage.
Summary of the invention
The present invention considers above-mentioned situation and proposes that its purpose is, good converter of a kind of fail safe and freezing cycle device are provided, and when the contingency current detecting is blocked with resistance, also can prevent the damage of switch element and drive circuit.
The converter of the invention that technical scheme 1 relates to, switching circuit with a plurality of switch elements is applied direct voltage, conducting by each switch element, end, make the winding of current direction motor, have: current detecting resistance is arranged on the direct voltage supply line at switching circuit; Resistance is used in protection, is connected in parallel with resistance with this current detecting, has than this current detecting with the big resistance value of resistance; And control unit, according to the electric current that flows to these resistance each switch element is carried out conducting, ends driving.
In specification, explain other objects of the present invention and advantage below in detail, and partial content can be released from specification significantly or recognize by putting into practice the present invention.By by means of or the following embodiment that specifies of combination, other objects of the present invention and advantage can be identified and obtain.
Description of drawings
Accompanying drawing comprises and constitutes the part of specification, is used to set forth preferred implementation of the present invention now, explains inventive concept of the present invention with the detailed description of above general remark that provides and the following preferred implementation that provides.
Fig. 1 is the block diagram of the structure of each execution mode of expression.
Fig. 2 is the figure of concrete structure of the circuit substrate of expression first execution mode.
Fig. 3 is the figure that watches the section of the A-A line in Fig. 2 along the direction of arrow.
Fig. 4 is the figure of concrete structure of the circuit substrate of expression second execution mode.
Fig. 5 is the figure that watches the section of the A-A line in Fig. 4 along the direction of arrow.
Fig. 6 is the figure of the major part structure of the inhibition parts in expression the second and the 3rd execution mode.
Fig. 7 is the figure of the concrete structure of the circuit substrate in expression the 3rd execution mode.
Fig. 8 is the figure that watches the section of the A-A line in Fig. 7 along the direction of arrow.
Embodiment
Below, with reference to description of drawings first execution mode of the present invention.
As shown in Figure 1, the alternating voltage of commercial ac power source 1 is converted into direct voltage by rectification circuit 2, and this direct voltage is applied in to being connected in as the positive side line L1 of direct voltage supply line and control power supply circuit 3 and the switching circuit 10 between the minus side line L2.Control power supply circuit 3 is made of reduction voltage circuit, this reduction voltage circuit for example is pressed into direct current 12V and the 5V that uses power supply as the action of drive circuit 40 to the dc voltage drop of 280V, control circuit 30 that above-mentioned drive circuit 40 drivings are narrated later and the switch element in the switching circuit 10.Two switch elements that switching circuit 10 has U, V, this three-phase of W are the series circuit of MOSFET for example, have MOSFET11u, have MOSFET 12u at the high-voltage side of U phase at the low voltage side of U phase, have MOSFET 11v, have MOSFET 12v at the high-voltage side of V phase, have MOSFET 11w, have MOSFET 12w at the low voltage side of W phase at the high-voltage side of W phase at the low voltage side of V phase.
The interlinkage of MOSFET 11u, 12u in this switching circuit 10 is connecting the phase winding Lu of air compressor motor M, connect the phase winding Lv of air compressor motor M at the interlinkage of MOSFET 11v, 12v, connecting the phase winding Lw of air compressor motor M at the interlinkage of MOSFET 11w, 12w.Air compressor motor M is made of stator with 3 phase winding Lu, Lv being star-star connection, Lw and rotor with permanent magnet, interaction between the magnetic field that magnetic field that produces by current direction phase winding Lu, Lv, Lw and permanent magnet produce, rotor rotation is so this air compressor motor M is housed in the closed-type compressor of freezing cycle device (not shown) of air-conditioning equipment etc.
And insertion is connecting a plurality of resistor group that current detecting is used on the minus side line L2 of the direct voltage supply of switching circuit 10 relatively, and this resistor group for example constitutes by two resistance 21,22 that are connected in parallel.Several m Ω that resistance 21 has an allowance 1% are the resistance value of 2m Ω for example, and resistance 22 has allowance 5%, size and is tens of m Ω of about 10 times of resistance 21 resistance value of 25m Ω for example.According to the correlation of this resistance value, just often, electric current nearly all flows to resistance 21 sides, and electric current less flows to resistance 22.Specifically, the electric current that flows to each resistance is the reciprocal proportion of the ratio of this resistance value, thus flow to the electric current of resistance 22 be flow to resistance 21 electric current 2/25.Thus, resistance 21 is brought into play the effect of principal current detection resistance, the effect of resistance 22 performances secondary (protection is used) resistance.Below, resistance 21 is called current detecting resistance, resistance 22 is called protection resistance.
The voltage that produces in the parallel circuits with resistance 21,22 with resistance and protection in this current detecting offers control part (control unit) 30.It is drive signal generating unit 32 and the protective circuit 33 that the output of the A/D converter 31 of digital signal and this A/D converter 31 offers that control part 30 has the voltage transitions that results from parallel circuits, and control part 30 utilizes the direct voltage of being supplied with by control power supply circuit 3 to move.Drive signal generating unit 32 detects from the output of A/D converter 31 and flows to current detecting with resistance and the protection electric current (mainly being the electric current that flows to current detecting usefulness resistance 21) with the parallel circuits of resistance 21,22; by detect the vector control of electric current based on this, generate PWM (pulse-width modulation) signal that is used for driving switch circuit 10.This pwm signal offers drive circuit 40.Drive circuit 40 utilizes the direct voltage of being supplied with by control power supply circuit 3 to move, will with each MOSFET that offers switching circuit 10 from the corresponding conducting of the pwm signal of drive signal generating unit 32, by drive signal.
Above-mentioned protective circuit 33 also detects from the output of A/D converter 31 and flows to current detecting with resistance and the protection electric current (mainly being the electric current that flows to current detecting usefulness resistance 21) with the parallel circuits of resistance 21,22; when this detection electric current reaches for each element of protection switch circuit 10 that for example 50A is above more than the predefined predetermined value; send halt instruction to drive signal generating unit 32, the driving of air compressor motor M is stopped at once.Drive signal generating unit 32 stops the generation of pwm signal immediately when protective circuit 33 receives halt instruction, and whole switch elements are ended.
According to this structure, under the normal state of each resistance, when the current direction current detecting more than predetermined value is used the parallel circuits of resistance 22 with resistance 21 and protection, send halt instructions from protective circuit 33 to drive signal generating unit 32 with higher response.According to this halt instruction,, thereby prevent the damage of each MOSFET in the switching circuit 10 no longer from drive signal generating unit 32 output pwm signals.Even when flowing to MOSFET at short notice owing to the big electric current that surpasses this allowed band, MOSFET also damages, so guaranteed extremely high response in the action of this protective circuit 33.Utilize these rectification circuits 2, control power supply circuit 3, switching circuit 10, current detecting with resistance 22, control part 30 and drive circuit 40, to constitute the converter that air compressor motor drives usefulness with resistance 21, protection.
And; set current detecting and use each resistance value of resistance 22 with resistance 21 and protection; make when this converter is output as minimum (minimum output frequency); block for a certain reason with resistance 21 with the current detecting in the resistance 22 with resistance 21 and protection and when being in open state, the detection electric current in the protective circuit 33 reaches more than the above-mentioned predetermined value in current detecting as minimum resistance.
In above circuit, just often, from the output of A/D converter 31, detect electric current, control driving switch circuit 10, thereby Driven Compressor motor by the vector that detects the size of electric current based on this.
On the other hand, in detection resistance 21 for a certain reason and during blocking-up, electric current only flows to protection with resistance 22, but at this constantly, and switching circuit 10 is still the state that is connected with resistance 22 by protecting with electrical path between the minus side line L2.Therefore, under the open situation of the electrical path between switching circuit 10 and the minus side line L2, at the MOSFET12u that exists in low-voltage one side of switching circuit 10,12v, the conducting of 12w, when drive signal is low level (between the off period), MOSFET12u, 12v, the current potential of the drain electrode of 12w (electric current outlet side terminal) is compared with the current potential of grid (driving signal input) becomes very high state, from MOSFET 12u, 12v, the drain-to-gate of 12w is applied in bigger back voltage, MOSFET 12u, 12v, 12w and drive circuit 40 are unlikely to produce damage.
When these detection resistance 21 blocking-up, if continue the driving of the air compressor motor of switching circuit 10, then protection makes temperature rise with resistance 22 owing to resistance value is higher, and causes cause thermal damage.As a result, cause protection also to be blocked with resistance 22, finally might produce can not protection switch circuit 10 problem.
But in the present embodiment, when current detecting was blocked with resistance 21, A/D converter 31 read the bigger protection of resistance value with voltage between the two ends of resistance 22, compares the electric current that sharply increased in the past so protective circuit 33 detects.That is, according to the resistance value R1 of just often resistor group set from A/D converter 31 read the conversion of voltage V to electric current I, detecting current value I is to be scaled electric current according to I=V/R1 from voltage.But; when current detecting is blocked with resistance 21; although the current value I that flows to switching circuit 10 is identical before and after blocking-up, the resistance value of the reading object of actual A/D converter 31 becomes just protection with the big resistance value R2 of resistance 22 (R2〉〉 R1) from the resistance value R1 of resistor group.Therefore, the voltage V that reads of A/D converter 31 sharply increases to V=I * R2 from the value of up to the present V=I * R1.Owing to do not change to the change type I=V/R1 of electric current I from the voltage V that reads of A/D converter 31, the result, by A/D converter 31 read from the transformation result of voltage V to electric current I, be regarded as detecting bigger electric current.
Because the detection of this big electric current, protective circuit 33 has been judged overcurrent and has been flow through, and the running of converter stops at once.As a result, electric current can not continue to flow to protection with resistance 22, can avoid protecting the cause thermal damage with resistance 22.
In addition, being to be installed under the situation of the converter on the freezing cycle device of air-conditioning equipment etc., according to the variation of air conditioner load, Be Controlled in the wider range of the output of converter from the minimum to the maximum.Under this condition, protective circuit 33 detects predetermined value that electric currents begin to protect action relatively and is set to the bigger value of detection electric current when being output as maximum (maximum output frequency) than converter.Detection electric current when herein, converter is output as maximum is about 5 times of detection electric current when being output as minimum (minimum output frequency).In view of the above, protective circuit 33 detects predetermined value that electric currents begin to protect action relatively and, need be set at about its 6 times during as benchmark at the detection electric current that is output as with converter hour.For example, as current value, the electric current that converter is output as hour is set to 10A, and the electric current when converter is output as maximum is set to 50A, and protective circuit 33 begins to protect the predetermined value of action to be set to 60A etc.
Therefore; preestablish current detecting and use each resistance value of resistance 22 with resistance 21 and protection; make and block with resistance 21 with the current detecting in the resistor group of resistance 22 with resistance 21 and protection and when becoming open state as minimum resistance in current detecting, the resistance value of this resistor group reach become open state before more than 6 times.According to this setting; just in case, when current detecting becomes open state with resistance 21 in the operation process of converter, even converter is with minimum output running; the detection electric current also reaches protective circuit 33 and begins to protect more than the predetermined value of action, and the running of converter stops at once.Thus, the blocking-up that causes because of cause thermal damage with resistance 22 can be prevented to protect reliably, and then the damage of MOSFET 12u, 12v, 12w and drive circuit 40 can be prevented reliably.
On the other hand, Fig. 2 and Fig. 3 represent current detecting resistance 21 and the protection preferred concrete structure of resistance 22.Fig. 3 is the figure that watches the section of the A-A line in Fig. 2 along the direction of arrow.
At first, current detecting is connected on the conductive pattern (Copper Foil) 51,52 of circuit substrate 50 and the surface-adhered type shunt resistance that contacts with its face by soldering with resistance 21, comprising: the rectangular plate shape main body that is configured to leave the state of circuit substrate 50; Extend to a pair of 21a of foot, the 21b of the L font of circuit substrate 50 sides from the mutual opposed both sides of this main body; Between the 21a of this foot, 21b, separate minim gap and extend to a pair of amperometric determination of L font of circuit substrate 50 sides with terminal (being also referred to as Kelvin's terminal) 21c, 21d.Placing the flange of the 21a of foot, 21b on the conductive pattern 51,52 that is coated with paste scolding tin H with surface contact state, when circuit substrate 50 passed through heating furnace under this state, current detecting was connected on the conductive pattern 51,52 by soldering with resistance 21.Advantage such as that this surface-adhered type shunt resistance has is small-sized, allowance is less, high accuracy, thermal diffusivity are good, can set accurately allowance 1% several m Ω levels than low-resistance value.But, under the situation that is the surface-adhered type shunt resistance,, whether reliably connect conductive pattern 51,52 so can not confirm scolding tin H because paste scolding tin H is positioned at the lower face side of flange of the 21a of foot, the 21b of element.
On the other hand; protection is to be connected lead formula cement resistor (no-induction) on the conductive pattern 51,52 of circuit substrate 50 by soldering by lead (リ-De) with resistance 22; insert lead pin 22a, 22b and inject scolding tin H to the inserting hole 51a, the 52a that are formed on conductive pattern 51,52 and the circuit substrate 50, connect thus and fix.This lead formula cement resistor is compared bigger with surface-adhered type, but price is low, and has soldering and connect reliable and be electrically connected the reliability advantage of higher.
Like this, use resistance 22 with resistance 21 with protecting, adopt suitable structure and installation method respectively, can obtain the circuit of high reliability thus as the current detecting that effect is different.For example, suppose because vibration waits influence to make when the surface-adhered type current detecting comes off with the connection of resistance 21, but the lead formula protects the connection of usefulness resistance 22 firm, can not come off owing to such vibrations.This point also can prevent the damage of MOSFET 12u, 12v, 12w and drive circuit 40.
Second execution mode is described.
In second execution mode, appended current detecting with the connection of resistance 21 and the fixing inhibition parts of usefulness.Fig. 4 and Fig. 5 represent this structure.Fig. 5 is the figure that watches the section of the A-A line in Fig. 4 along the direction of arrow.
At first, current detecting is connected on the conductive pattern 51,52 of circuit substrate 50 with surface contact state mounting and soldering with the flange of the 21a of foot, the 21b of resistance 21.Identical to this with first execution mode.Under this state, on 51,52 the stage portion, be connected with the tabular inhibition parts of conductivity 61,62 with the state soldering that overlaps respectively with respect to the flange (face contact portion) of the 21a of foot, the 21b of conductive pattern 51,52 with from this flange to conductive pattern.Suppress parts 61,62 and be also referred to as bus, be bent into to overlapping the shape on above-mentioned stage portion well.In addition, the thickness of slab that suppresses parts 61,62 for example is 300～500 μ m, and the thickness of conductive pattern 51,52 for example is 35～50 μ m.
By adopting this inhibition parts 61,62, just in case when the lower surface of the flange of the 21a of foot, 21b and the face contact portion between the conductive pattern 51,52 produce air layer or gap, current detecting also can be installed securely with resistance 21.And the lower face side of the flange of the 21a of foot, 21b contacts with 51,52 of conductive patterns, and upper surface side contacts with 61,62 of parts of inhibition.By the contact of this two sides, can guarantee the good conducting state of current detecting between resistance 21 and the conductive pattern 51,52.And, because electric current also flows out from suppressing parts 61,62, disperse so can realize electric current, can avoid the current concentration of the part in the conductive pattern 51,52.And the soldering area enlarges by two sides contact, so the conductor at soldering position is compared when not suppressing parts than resistance, is reduced to about 1/10, can significantly reduce the caloric value at soldering position.By such reduction caloric value, soldering connects difficult drop-off, and the reliability that soldering connects improves.
And, as shown in Figure 6, suppress parts 62 and have a plurality of breach 62a in the front-end edge portion of the face that overlaps with the flange (face contact portion) of the 21a of foot, 21b.By these breach 62a, flange that can the visual 21a of foot, 21b and suppress the state of the scolding tin H between the parts 62, visual by this, can judge easily whether soldering connects good.Though diagram is not suppressing equally to be formed with a plurality of breach 61a on the parts 61 yet.
In addition, by append scolding tin H (so-called additional scolding tin) under the state of the part that covers breach 61a, 62a, the soldering connection that suppresses parts 61,62 is more firm, also can be from top Visual Confirmation soldering connection status.The part of breach 61a, 62a forms step shape when this additional scolding tin, so scolding tin H infiltrates and the solder flux among the scolding tin H between the flange of the 21a of rapid release foot, 21b and the conductive pattern 51,52 easily.Thus, the operating efficiency of soldering connection significantly improves.
Protection is identical with first execution mode with effect with other structures such as connection of the conductive pattern 51,52 of 22 pairs of circuit substrates 50 of resistance, therefore omits explanation.
The 3rd execution mode is described.
In the 3rd execution mode, suppress the parts 61,62 except appending, also adopted to be used to make the fixing more firm structure that suppresses parts 61,62.Fig. 7 and Fig. 8 represent this structure.Fig. 8 is the figure that watches the section of the A-A line in Fig. 7 along the direction of arrow.
At first, current detecting is connected on the conductive pattern 51,52 of circuit substrate 50 with the flange of the 21a of foot, the 21b of resistance 21 with surface contact state mounting and soldering,, be connected with the coincidence status soldering respectively and suppressing parts 61,62 on 51,52 the stage portion with respect to the flange (face contact portion) of the 21a of foot, the 21b of conductive pattern 51,52 with from this flange to conductive pattern.Identical to this with second execution mode.
With the difference of second execution mode be, the end edge portion that suppresses parts 61,62 is by to circuit substrate 50 side bendings, and this bending part inserts among inserting hole 50a, the 50b of inserting hole 51b, the 52b of conductive pattern 51,52 and circuit substrate 50 and injects scolding tin H.According to this structure, suppress the fixedly more firm of parts 61,62 than second execution mode.
Protection is identical with first and second execution modes with effect with other structures such as connection of the conductive pattern 51,52 of 22 pairs of circuit substrates 50 of resistance, therefore omits explanation.
In addition, the invention is not restricted to above-mentioned execution mode, can in not changing the aim scope, carry out various distortion.
In addition, those skilled in the art can know other advantages of the present invention and be out of shape.Therefore, the present invention's specification that aspect widely, is not limited to herein illustrate and the execution mode of representative.So, in not breaking away from, can carry out various distortion by the aim of claims and theys' the defined inventive concept of equivalent and scope.
Claims (6)
1. converter, switching circuit (10) with a plurality of switch elements (11u, 11v, 11w, 12u, 12v, 12w) is applied direct voltage, conducting by each switch element (11u, 11v, 11w, 12u, 12v, 12w), end, make the winding (Lu, Lv, Lw) of current direction motor (M), it is characterized in that having:
Current detecting is arranged on the direct voltage supply line at described switching circuit (10) with resistance (21);
Protection is connected in parallel with resistance (21) with described current detecting with resistance (22), has than this current detecting big resistance value of resistance (22); And
Control unit (30) according to the electric current that flows to each described resistance (21,22), carries out conducting, ends driving each described switch element (11u, 11v, 11w, 12u, 12v, 12w).
2. converter according to claim 1 is characterized in that, described current detecting with resistance (21) be quilt cover contiguously soldering be connected surface-adhered type shunt resistance on the conductive pattern (51,52) of circuit substrate (50),
Described protection is to be connected cement resistor on the conductive pattern (51,52) of circuit substrate (50) by soldering by lead (22a, 22b) with resistance (22).
3. converter according to claim 2, it is characterized in that, the inhibition parts (61,62) that also have conductivity, the inhibition parts of this conductivity (61,62) are overlapped the ground soldering and are connected with respect to the face contact portion of the described current detecting usefulness resistance (21) of described conductive pattern (51,52) and from this face contact portion to described conductive pattern on the stage portion of (51,52).
4. converter according to claim 3 is characterized in that, described inhibition parts (61,62) have a plurality of breach (61a, 62a) in the edge portion of the face that overlaps with the face contact portion of resistance (21) with described current detecting.
5. freezing cycle device, has converter (2,3,10,21,22,30,40), this converter is made of the resistor group that a plurality of resistance (21,22) that are connected in parallel with resistance as current detecting are become, according to the current drives air compressor motor that flows to this resistor group, at this electric current is the driving that predetermined value stops air compressor motor when above, described freezing cycle device is characterised in that
Be output as hour at described converter (2,3,10,21,22,30,40), the resistance of minimum resistance becomes under the situation of open state in each described resistance (21,22), set the resistance value of each described resistance (21,22), described electric current is reached more than the described predetermined value.
6. freezing cycle device, has converter (2,3,10,21,22,30,40), this converter is made of the resistor group that a plurality of resistance (21,22) that are connected in parallel with resistance as current detecting are become, according to the current drives air compressor motor that flows to this resistor group, at this electric current is the driving that predetermined value stops air compressor motor when above, described freezing cycle device is characterised in that
The resistance of minimum resistance becomes under the situation of open state in each described resistance (21,22), sets the resistance value of each described resistance (21,22), the resistance value of described resistor group is reached become before this open state more than 6 times.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007274161A JP5354144B2 (en) | 2007-10-22 | 2007-10-22 | Inverter |
| JP274161/2007 | 2007-10-22 |
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| Publication Number | Publication Date |
|---|---|
| CN101488700A true CN101488700A (en) | 2009-07-22 |
| CN101488700B CN101488700B (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101700674A Active CN101488700B (en) | 2007-10-22 | 2008-10-22 | Inverter and refrigeration cycle device |
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|---|---|
| JP (1) | JP5354144B2 (en) |
| CN (1) | CN101488700B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102927655A (en) * | 2012-11-07 | 2013-02-13 | 华为技术有限公司 | Control method and device of inverter air conditioner and inverter air conditioner |
| CN103314265A (en) * | 2011-04-28 | 2013-09-18 | 三菱电机株式会社 | Heat pump apparatus, heat pump system and inverter control method |
| CN107743679A (en) * | 2015-06-17 | 2018-02-27 | 大金工业株式会社 | DC-to-AC converter |
| CN111971515A (en) * | 2018-04-25 | 2020-11-20 | 三菱电机株式会社 | Refrigeration cycle device |
| CN113358921A (en) * | 2021-06-03 | 2021-09-07 | 厦门为力电子有限公司 | Current sampling circuit of switching power supply and current detection circuit thereof |
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| CN103154638B (en) | 2010-10-15 | 2015-10-14 | 三菱电机株式会社 | The control method of heat pump assembly, heat pump and three-phase inverter |
| CN103270376B (en) | 2010-12-21 | 2015-04-15 | 三菱电机株式会社 | Heat pump device, heat pump system, and method for controlling three-phase inverter |
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| JP2621075B2 (en) * | 1988-05-31 | 1997-06-18 | 東洋電機製造株式会社 | Protection circuit |
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| CN103314265A (en) * | 2011-04-28 | 2013-09-18 | 三菱电机株式会社 | Heat pump apparatus, heat pump system and inverter control method |
| CN102927655A (en) * | 2012-11-07 | 2013-02-13 | 华为技术有限公司 | Control method and device of inverter air conditioner and inverter air conditioner |
| CN102927655B (en) * | 2012-11-07 | 2015-05-13 | 华为技术有限公司 | Control method and device of inverter air conditioner and inverter air conditioner |
| CN107743679A (en) * | 2015-06-17 | 2018-02-27 | 大金工业株式会社 | DC-to-AC converter |
| CN107743679B (en) * | 2015-06-17 | 2020-07-10 | 大金工业株式会社 | Inverter device |
| CN111971515A (en) * | 2018-04-25 | 2020-11-20 | 三菱电机株式会社 | Refrigeration cycle device |
| CN111971515B (en) * | 2018-04-25 | 2022-03-01 | 三菱电机株式会社 | Refrigeration cycle device |
| CN113358921A (en) * | 2021-06-03 | 2021-09-07 | 厦门为力电子有限公司 | Current sampling circuit of switching power supply and current detection circuit thereof |
| CN113358921B (en) * | 2021-06-03 | 2023-12-29 | 厦门为力电子有限公司 | Current sampling circuit of switching power supply and current detection circuit thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101488700B (en) | 2012-01-25 |
| JP5354144B2 (en) | 2013-11-27 |
| JP2009106036A (en) | 2009-05-14 |
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