CN101488700B - Inverter and refrigeration cycle device - Google Patents
Inverter and refrigeration cycle device Download PDFInfo
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- CN101488700B CN101488700B CN2008101700674A CN200810170067A CN101488700B CN 101488700 B CN101488700 B CN 101488700B CN 2008101700674 A CN2008101700674 A CN 2008101700674A CN 200810170067 A CN200810170067 A CN 200810170067A CN 101488700 B CN101488700 B CN 101488700B
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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 serves as the basis with the 2007-No. 274161 Japanese patent application of filing an application on October 22nd, 2007 and it is advocated priority, 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 Drive with converter and have the freezing cycle device of this converter.
Background technology
Motor Drive has the switching circuit that converts direct voltage into 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 through 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 through 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 stated; 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 current potential high state of the electric current outflow side terminal of this switch element than driving signal input; 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 through 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 to having a plurality of switch elements applies direct voltage; Conducting through each switch element, end; Make the winding of current direction motor, have: current detecting is used resistance, is arranged on the direct voltage supply line to 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, flow through the electric current of this parallel circuits with resistance and protection with voltage detecting between the two ends of the parallel circuits of resistance according to current detecting, according to the electric current that is detected to each switch element carry out conducting, by driving.
Illustrated in detail other objects of the present invention and advantage in specification below, and partial content can be released from specification or recognize through putting into practice the present invention significantly.Through by means of or the embodiment that specifies below the 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 through rectification circuit 2, and this direct voltage is applied in to the positive side line L1 and the control power supply circuit between the minus side line L2 3 and switching circuit 10 that are connected in as the direct voltage supply line.Control power supply circuit 3 is made up of reduction voltage circuit; This reduction voltage circuit for example is pressed into the dc voltage drop of 280V as the action of drive circuit 40 direct current 12V and the 5V with power supply, the switch element in the control circuit 30 that above-mentioned drive circuit 40 drives the back narration and 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 MOSFET12u at the high-voltage side of U phase at the low voltage side of U phase; Have MOSFET11v, have MOSFET12v at the high-voltage side of V phase, have MOSFET11w, have MOSFET12w at the low voltage side of W phase at the high-voltage side of W phase at the low voltage side of V phase.
MOSFET11u in this switching circuit 10, the interlinkage of 12u are connecting the phase winding Lu of air compressor motor M; Connect the phase winding Lv of air compressor motor M at the interlinkage of MOSFET11v, 12v, connecting the phase winding Lw of air compressor motor M at the interlinkage of MOSFET11w, 12w.Air compressor motor M is made up of stator with 3 phase winding Lu being star-star connection, Lv, 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 through 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, call current detecting to resistance 21 and use resistance, call protection to resistance 22 and use resistance.
Offer control part (control unit) 30 in this current detecting with the voltage that produces in resistance and the parallel circuits of protection with resistance 21,22.It is drive signal generation portion 32 and the protective circuit 33 that the output of A/D converter 31 and this A/D converter 31 of digital signal 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 generation portion 32 detects from the output of A/D converter 31 and flows to current detecting with resistance and the electric current (mainly be flow to current detecting electric current with resistance 21) of protection with the parallel circuits of resistance 21,22; Through 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 pwm signal of drive signal generation portion 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 electric current (mainly be flow to current detecting electric current with resistance 21) of protection 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 generation portion 32, the driving of air compressor motor M is stopped at once.Drive signal generation portion 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, the current direction current detecting more than predetermined value is with resistance 21 and protection during with the parallel circuits of resistance 22, with higher response from protective circuit 33 to the 32 transmission halt instructions of drive signal generation portion.According to this halt instruction,, thereby prevent the damage of each MOSFET in the switching circuit 10 no longer from drive signal generation portion 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 in the action of this protective circuit 33, guaranteed extremely high response.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 with resistance 21 and protection each resistance value with resistance 22; 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 through 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, switching circuit 10 is still the state that is connected with resistance 22 through 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; To the conducting of the MOSFET12u that exists in low-voltage one side of switching circuit 10,12v, 12w, when drive signal is low level (between the off period); The current potential of the drain electrode of MOSFET12u, 12v, 12w (electric current outlet side terminal) is compared with the current potential of grid (driving signal input) becomes very high state; Be applied in bigger back voltage from the drain-to-gate of MOSFET12u, 12v, 12w, MOSFET12u, 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 this execution mode, 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 resistance value R2 greatly 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 and detect 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 here, 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 with resistance 21 and protection each resistance value with resistance 22; 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 MOSFET12u, 12v, 12w and drive circuit 40 can be prevented reliably.
On the other hand, Fig. 2 and Fig. 3 represent that current detecting is with resistance 21 and the preferred concrete structure of protection with 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 a pair of amperometric determination of L font that minim gap extends to circuit substrate 50 sides with terminal (being also referred to as Kelvin's terminal) 21c, 21d.On the conductive pattern that is coated with paste scolding tin H 51,52, placing the flange of the 21a of foot, 21b with surface contact state, during through heating furnace, current detecting is connected on the conductive pattern 51,52 by soldering with resistance 21 circuit substrate 50 under this state.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 the wire cement resistor (no-induction) on the conductive pattern 51,52 of circuit substrate 50 by soldering through lead (リ-De) with resistance 22; To be formed at inserting hole 51a on conductive pattern 51,52 and the circuit substrate 50,52a inserts lead pin 22a, 22b and injects scolding tin H, connect thus and fix.This wire 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, as the different current detecting of effect with resistance 21 with protect with resistance 22, adopt suitable structure and installation method respectively, can obtain the circuit of high reliability thus.For example, suppose, but that wire is protected is firm with the connection of resistance 22, can not be come off owing to such vibrations because influence such as vibration makes when the surface-adhered type current detecting comes off with the connection of resistance 21.This point also can prevent the damage of MOSFET12u, 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 carried with surface contact state with the flange of the 21a of foot of resistance 21,21b and is put and soldering is connected on the conductive pattern 51,52 of circuit substrate 50.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 21a of foot of conductive pattern 51,52, the flange of 21b (face contact portion) 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.
Should suppress parts 61,62 through adopting, just in case when the lower surface of the flange of the 21a of foot, 21b and conductive pattern 51, face contact portion generation air layer or gap between 52, 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.Through the contact of this two sides, can guarantee that current detecting is with resistance 21 and conductive pattern 51, good conducting state between 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 through 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.Through 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.Through these breach 62a, can the visual 21a of foot, the flange of 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, through under the state of the part that covers breach 61a, 62a, appending scolding tin H (so-called additional scolding tin), it is more firm that the soldering that suppresses parts 61,62 connects, also can be from the 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 flange of the 21a of rapid release foot, 21b and conductive pattern 51, the scolding tin H between 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 carried with surface contact state with the flange of the 21a of foot of resistance 21,21b and is put and soldering is connected on the conductive pattern 51,52 of circuit substrate 50;, be connected with the coincidence status soldering respectively and suppressing parts 61,62 on 51,52 the stage portion with respect to the 21a of foot of conductive pattern 51,52, the flange of 21b (face contact portion) 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 the inserting hole 50a, 50b of inserting hole 51b, 52b and the circuit substrate 50 of conductive pattern 51,52 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 here explain and the execution mode of representative.So, in the aim and the scope that do not break away from by claims and their defined inventive concept of equivalent, can carry out various distortion.
Claims (6)
1. converter; Switching circuit (10) to having a plurality of switch elements (11u, 11v, 11w, 12u, 12v, 12w) applies direct voltage; Conducting through 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 on the direct voltage supply line of said switching circuit (10) with resistance (21);
Protection is connected in parallel with resistance (21) with said current detecting with resistance (22), has than this current detecting with the big resistance value of resistance (22); And
Control unit (30); According to said current detecting with resistance (21) and said protection with voltage between the two ends of the parallel circuits of resistance (22); The electric current of this parallel circuits is flow through in detection; According to the electric current that is detected, each said switch element (11u, 11v, 11w, 12u, 12v, 12w) is carried out conducting, ends driving.
2. converter according to claim 1 is characterized in that, said current detecting with resistance (21) be quilt cover contiguously soldering be connected the surface-adhered type shunt resistance on the conductive pattern (51,52) of circuit substrate (50),
Said protection is to be connected the cement resistor on the conductive pattern (51,52) of circuit substrate (50) by soldering through 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) is overlapped soldering be connected with respect to the said current detecting of said conductive pattern (51,52) with the face contact portion of resistance (21) and from this face contact portion to said conductive pattern on the stage portion of (51,52).
4. converter according to claim 3 is characterized in that, said 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 said current detecting.
5. a freezing cycle device has converter (2,3,10,21,22,30,40), and this converter is made up 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 voltage between the two ends of this resistor group; The electric current of this resistor group is flow through in detection, according to the current drives air compressor motor that is detected, and is the driving that predetermined value stops air compressor motor when above at the electric current of this detection; Said freezing cycle device is characterised in that
Set the resistance value of each said resistance (21,22); Make and be output as hour at said converter (2,3,10,21,22,30,40); The resistance of minimum resistance becomes under the situation of open state in each said resistance (21,22), and said electric current reaches more than the said predetermined value.
6. a freezing cycle device has converter (2,3,10,21,22,30,40), and this converter is made up 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 voltage between the two ends of this resistor group; The electric current of this resistor group is flow through in detection, according to the current drives air compressor motor that is detected, and is the driving that predetermined value stops air compressor motor when above at the electric current of this detection; Said freezing cycle device is characterised in that
Set the resistance value of each said resistance (21,22), make that the resistance of minimum resistance becomes under the situation of open state in each said resistance (21,22), the resistance value of said resistor group reach 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 |
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| CN101488700A CN101488700A (en) | 2009-07-22 |
| CN101488700B true CN101488700B (en) | 2012-01-25 |
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| 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) |
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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 |
| JP5490260B2 (en) | 2010-12-21 | 2014-05-14 | 三菱電機株式会社 | HEAT PUMP DEVICE, HEAT PUMP SYSTEM, AND INVERTER CONTROL METHOD |
| CN103314265B (en) * | 2011-04-28 | 2016-06-22 | 三菱电机株式会社 | The control method of heat pump assembly, heat pump and inverter |
| 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 |
| JP6894181B2 (en) * | 2015-06-17 | 2021-06-30 | ダイキン工業株式会社 | Inverter device |
| CN111971515B (en) * | 2018-04-25 | 2022-03-01 | 三菱电机株式会社 | Refrigeration cycle device |
| 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 |
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| US6262902B1 (en) * | 1998-12-09 | 2001-07-17 | Fuji Electric Co., Ltd. | Power conversion component with integral output current shunt and its manufacturing method |
| CN1783692A (en) * | 2002-07-10 | 2006-06-07 | 日立空调系统株式会社 | Speed controller of synchronous motor |
| CN101025156A (en) * | 2006-02-24 | 2007-08-29 | 海尔集团公司 | DC frequency-changeable compressor driving apparatus and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2621075B2 (en) * | 1988-05-31 | 1997-06-18 | 東洋電機製造株式会社 | Protection circuit |
| JP2989390B2 (en) * | 1992-09-28 | 1999-12-13 | 三洋電機株式会社 | Hybrid integrated circuit device |
| JP3329995B2 (en) * | 1995-08-28 | 2002-09-30 | 松下電工株式会社 | Method for manufacturing circuit board with electric components |
| JP3677174B2 (en) * | 1999-06-30 | 2005-07-27 | 株式会社東芝 | microwave |
| JP2007173171A (en) * | 2005-12-26 | 2007-07-05 | Matsushita Electric Ind Co Ltd | Condition detection device for detecting operating condition of high-frequency heating device |
| JP4958440B2 (en) * | 2006-01-12 | 2012-06-20 | パナソニック株式会社 | High frequency heating device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6262902B1 (en) * | 1998-12-09 | 2001-07-17 | Fuji Electric Co., Ltd. | Power conversion component with integral output current shunt and its manufacturing method |
| CN1783692A (en) * | 2002-07-10 | 2006-06-07 | 日立空调系统株式会社 | Speed controller of synchronous motor |
| CN101025156A (en) * | 2006-02-24 | 2007-08-29 | 海尔集团公司 | DC frequency-changeable compressor driving apparatus and method |
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| Publication number | Publication date |
|---|---|
| CN101488700A (en) | 2009-07-22 |
| JP2009106036A (en) | 2009-05-14 |
| JP5354144B2 (en) | 2013-11-27 |
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