CN101839940A - Output current detection circuit of phase inverter - Google Patents
Output current detection circuit of phase inverter Download PDFInfo
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- CN101839940A CN101839940A CN201010177804A CN201010177804A CN101839940A CN 101839940 A CN101839940 A CN 101839940A CN 201010177804 A CN201010177804 A CN 201010177804A CN 201010177804 A CN201010177804 A CN 201010177804A CN 101839940 A CN101839940 A CN 101839940A
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- phase inverter
- output current
- mentioned
- detection circuit
- current detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to an output current detection circuit of a phase inverter, which comprises the following components: a resistor part which is provided with a plurality of resistor components connected with the switching components of the phase inverter that converts the input DC power to AC power; a connection part which transmits a signal used for detecting the output current of the phase inverter to a current detection part at two ends of each of the resistor components; and the current detection part which detects the output current of the phase inverter through the signal transmitted from the two ends of each resistor component. Therefore, the signal used for detecting the output current of the phase inverter is detected out at the two ends of each of the resistor components. At a state that the mode is changed because of circuit modification, the current detection value is not affected.
Description
Technical field
The present invention relates to output current detection circuit of phase inverter, more detailed says so, relate to a kind of under the situation of mode altering, the also output current detection circuit of phase inverter that can not exert an influence to current detection value.
Background technology
In general, output current detection circuit of phase inverter can be arranged at the motor control assembly of the Electric Machine Control of electric household appliances such as being used for device for processing washings, air conditioner.
In the drum wash thing treating apparatus in device for processing washings, be invested at washing agent, washings and washings under the state of cylinder inside, utilization is delivered to cylinder that the driving force of motor is rotated and the friction force of washings is washed, thus, washings is caused damage hardly, and washings does not twine mutually, and, can obtain beating the effect of washing by rubbing with the hands.
Air conditioner is a kind of being arranged in the spaces such as room, parlor, office or business shop, by regulating temperature, humidity, cleanliness factor and the air-flow of air, to keep the device of comfortable indoor environment.
In air conditioner, in compressor, fan etc., use motor, and use is useful on the motor control assembly that drives above-mentioned motor, motor control assembly is input to alternating voltage commonly used, and be converted into DC voltage, DC voltage is converted to the AC power commonly used of set frequency and supplies to motor, thus the motor of controlling and driving compressor, fan etc.
In addition, Fig. 1 is the synoptic diagram of general output current detection circuit of phase inverter.With reference to accompanying drawing, in phase inverter 10, for the AC power commonly used that DC voltage is converted to set frequency and supply to motor 20, and comprise a plurality of switchings) element 11,12,13,14,15,16.And resistance section 30 is connected with phase inverter 10, comprises a plurality of resistive elements 32,34,36 in order to detect the phase inverter output current.And current detecting part 40 is connected with resistance section 30, detecting the phase inverter output current, and detected output current is offered control part 45.
But, as shown in Figure 1, be under the situation of 4 lines of shared, U phase, V phase, W phase at the line that is connected to current detecting part from resistance section, the length of 4 ray modes, width etc. will exert an influence to current detection value, particularly, under the situation that pattern is changed, will exist current detection value owing to circuit modification by the problem of different detections.
Summary of the invention
The object of the present invention is to provide a kind of output current detection circuit of phase inverter, in the present invention, each two ends at resistive element detect the signal that is used to detect the phase inverter output current,, also can not exert an influence to current detection value under the situation that pattern is changed owing to circuit modification.
For achieving the above object, the present invention is achieved by the following technical solutions:
In order to achieve the above object, according to the output current detection circuit of phase inverter of washing of the present invention, it comprises with lower member: be provided with a plurality of with in order the direct supply of importing to be converted to the resistance section of the resistive element that the switching device of the phase inverter of AC power is connected by blocked operation; The signal that will be used to detect the phase inverter output current at each two ends of resistive element sends the connecting portion of current detecting part to; The current detecting part of the output current by the input phase inverter that transmits from the two ends of each resistive element.
Aforesaid output current detection circuit of phase inverter is characterized in that: be provided with three resistive elements that are used for detecting respectively the phase inverter output current corresponding with three of motor in the above-mentioned resistance section.
Aforesaid output current detection circuit of phase inverter is characterized in that: comprise also that in above-mentioned a plurality of resistive elements lower end the excess current that flows that is used for detection of excessive current detects resistance.
Aforesaid output current detection circuit of phase inverter is characterized in that: above-mentioned resistive element is made of shunt resistance.
Aforesaid output current detection circuit of phase inverter is characterized in that: in order to detect the phase inverter output current, above-mentioned connecting portion detects voltage signal at each two ends of above-mentioned resistive element, and sends above-mentioned current detecting part to.
Aforesaid output current detection circuit of phase inverter, it is characterized in that: comprise in the above-mentioned phase inverter that the rising edge switching device that will be connected in series mutually and negative edge switching device are as a pair of, three pairs of rising edges, negative edge switching device with connection parallel with one another, and above-mentioned resistive element is connected with above-mentioned each negative edge switching device.
Aforesaid output current detection circuit of phase inverter is characterized in that: above-mentioned connecting portion is switched on and in the process of motor supplying electric current, detects the signal that is used to detect the phase inverter output current at three negative edge switching devices of above-mentioned phase inverter.
The invention has the beneficial effects as follows: as mentioned above, in output current detection circuit of phase inverter of the present invention, each two ends at resistive element detect the signal that is used to detect the phase inverter output current,, can not exert an influence under the situation that pattern is changed owing to circuit modification to current detection value yet.
Description of drawings
Fig. 1 is the synoptic diagram of general output current detection circuit of phase inverter;
Fig. 2 illustrates the stereographic map that inside is provided with the device for processing washings of the output current detection circuit of phase inverter in one embodiment of the invention;
Fig. 3 is the synoptic diagram of the output current detection circuit of phase inverter in one embodiment of the invention;
Fig. 4 is the synoptic diagram of the output current detection circuit of phase inverter in another embodiment of the present invention;
Fig. 5 is the circuit diagram that illustrates the motor control assembly in one embodiment of the invention.
The symbol description * * * of * * accompanying drawing major part
10: phase inverter 20: motor
30: resistance section 40: current detecting part
Embodiment
Below, with reference to the accompanying drawings, the embodiment among the present invention is described in detail.
Fig. 2 illustrates the stereographic map that inside is provided with the device for processing washings of the output current detection circuit of phase inverter in one embodiment of the invention.
Below, describe with reference to the accompanying drawings.Comprise in the device for processing washings 200 with lower member: the housing 210 that forms the outward appearance of device for processing washings 200; Be arranged at the inside of above-mentioned housing 210, and the washing tub 220 that is supported by housing 210; Be arranged at the inside of washing tub 220, be used to the cylinder of washing bag; The motor 230 that is used for head roll; Be arranged at the outside of enclosure body 211, be used for washings feedway (not shown) to the internal feed washings of housing 210; Be formed at washing tub 220 downsides, be used for discharging the drainage arrangement (not shown) of washings to the outside.
Be formed with in the cylinder and be used to a plurality of through hole 222A that washings are passed through, and, be provided with lifting gear 224 at the medial surface of cylinder, when cylinder rotates, after above-mentioned lifting gear 224 is used for washings lifted to certain altitude, and it is dropped by action of gravity.
Comprise with lower member in the above-mentioned housing 210: enclosure body 211; Be arranged at the front of enclosure body 211 and the case lid 212 of combination; Be arranged at the upside of case lid 212, and the control panel 215 that combines with enclosure body 211; Be arranged at the upside of control panel 215, and the top panel 216 that combines with enclosure body 211.
Comprise with lower member in the above-mentioned case lid 212: for make washing contract out into and the washing that forms contracts out hand-hole 214; Contract out hand-hole 214 and the door 213 of the setting of direction turn to the left and right in order to open and close washing.
Comprise with lower member in the above-mentioned control panel 215: the operating key 217 that is used for the operating condition of operated wash thing treating apparatus 200; Be arranged at a side of operating key 217, be used to show the display device 218 of the operating condition of device for processing washings 200.
Operating key 217 on the control panel 215 and display device 218 are electrically connected with control part (not shown), and control part (not shown) is used for each textural element of device for processing washings 200 is carried out electric control.
Control part is input to the operation signal line operate of going forward side by side from operating key 217, thus, can carry out main washing, cleaning, dehydration stroke, in order to lead washing, cleaning, dehydration stroke, control part will be by control such as phase inverter motor 230, that is, and and in order to control above-mentioned motor, though not shown, it can be controlled by phase inverter (not shown).For example, when from control part during to phase inverter output PWM switch-over control signal, phase inverter will carry out the high speed blocked operation, and the AC power of set frequency can be supplied to motor 230, at this moment, control part detects the phase inverter output current, and can be as reference in the generation of PWM switch-over control signal.
Fig. 3 is the synoptic diagram of the output current detection circuit of phase inverter in one embodiment of the invention.
With reference to accompanying drawing, according to the output current detection circuit of phase inverter in one embodiment of the invention, it comprises with lower member: phase inverter 10; Motor 20; The resistance section 30 that comprises a plurality of resistive elements 32,34,36; The current detecting part 40 that is connected with each two ends of above-mentioned resistive element; Control part 45.
Comprise in the above-mentioned phase inverter 10: rising edge switching device 11,12,13 that will be connected in series mutually and negative edge switching device 14,15,16 are as a pair of, with three pairs of rising edges, the negative edge switching device of connection parallel with one another.
Can be provided with a plurality of resistive elements 32,34,36 that are connected with each negative edge switching device 14,15,16 in the resistance section 30, at this moment, in resistance section 30, can be provided with three resistive element Ra, the Rb, the Rc that are used for detecting respectively the phase inverter output current corresponding with three of motor, and each resistive element can be made of shunt resistance.
Connecting portion will be used to detect the phase inverter output current at each two ends of resistive element 32,34,36 signal sends current detecting part 40 to, and it can be made of 6 lines.At this moment, in order to detect the phase inverter output current, connecting portion can send voltage signal to current detecting part 40 at each two ends of resistive element.
And connecting portion is switched on and in the process of motor supplying electric current, can detects the signal that is used to detect the phase inverter output current at three negative edge switching devices of phase inverter.
Current detecting part 40 can go out the output current of phase inverter by the input that transmits from the two ends of each resistive element 32,34,36, and offers control part 45.
Fig. 4 is the synoptic diagram of the output current detection circuit of phase inverter in another embodiment of the present invention.
With reference to accompanying drawing, according to the output current detection circuit of phase inverter in another embodiment of the present invention, it comprises with lower member: phase inverter 10; Motor 20; The resistance section 30 that comprises a plurality of resistive elements 32,34,36,50; The current detecting part 40 that is connected with each two ends of above-mentioned resistive element; Control part 45.
Comprise in the above-mentioned phase inverter 10: rising edge switching device 11,12,13 that will be connected in series mutually and negative edge switching device 14,15,16 are as a pair of, with three pairs of rising edges, the negative edge switching device of connection parallel with one another.
Can be provided with a plurality of resistive elements 32,34,36 that are connected with each negative edge switching device 14,15,16 in the resistance section 30, at this moment, in resistance section 30, can be provided with three resistive element Ra, the Rb, the Rc that are used for detecting respectively the phase inverter output current corresponding with three of motor, and each resistive element can be made of shunt resistance.
And resistance section 30 can comprise also that in the lower end of three resistive element Ra, Rb, Rc the excess current that flows that is used for detection of excessive current detects resistance R sc.
Connecting portion will be used to detect the phase inverter output current at each two ends of resistive element 32,34,36 signal sends current detecting part 40 to, and it can be made of 6 lines.At this moment, in order to detect the phase inverter output current, connecting portion can send voltage signal to current detecting part 40 at each two ends of resistive element.
And connecting portion is switched on and in the process of motor supplying electric current, can detects the signal that is used to detect the phase inverter output current at three negative edge switching devices of phase inverter.
Current detecting part 40 can go out the output current of phase inverter by the input that transmits from the two ends of each resistive element 32,34,36, and offers control part 45.
Fig. 5 is the circuit diagram that illustrates the motor control assembly in one embodiment of the invention.
With reference to accompanying drawing, according to the motor control assembly in one embodiment of the invention 500, it comprises with lower member: converter 510; Phase inverter 520; Control part 530; Current detecting part 540.And, also can comprise stabilizator (L), smmothing capacitor (C) etc. in the motor control assembly 500.
Stabilizator (L) is arranged between AC power 505 commonly used and the converter 510, and carries out power factor compensation or boost operations.And stabilizator (L) can be carried out the high speed switching that limits converter 510 and the function of the high-frequency current that causes.
Converter 510 will be converted to direct supply and output via the AC power commonly used 505 of stabilizator (L), to use AC power 505 in the drawing always and be illustrated as single phase alternating current power supply, but, it also can be a three-phase alternating-current supply, according to the kind of AC power 505 commonly used, the inner structure of converter 510 will be different.For example, under the situation of single phase alternating current power supply, the converter of the semi-bridge type that is connected with 2 switching devices and 4 diodes can be used, under the situation of three-phase alternating-current supply, 6 switching devices and 6 diodes can be used.
Be provided with a plurality of switching devices in the converter 510, will carry out boost operations, power factor compensation and direct supply conversion by blocked operation.In addition, converter 510 also can be made of diode etc., thereby can not have the execution rectification operation of other blocked operation.
Smmothing capacitor (C) is connected with the output terminal of converter 510, and is used for the level and smooth direct supply that is converted from converter 510 outputs.Below, the output terminal of converter 510 is called dc end or dc end of link, obtain level and smooth DC voltage at the dc end and will be linked in the phase inverter 520.
Be provided with a plurality of phase inverter switching devices in the phase inverter 520, it will obtain the three-phase alternating-current supply that level and smooth direct supply is converted to set frequency, and export to threephase motor 550 by the on/off operation of switching device.
In phase inverter 520, the rising edge switching device Sa that each is connected in series mutually, Sb, Sc and negative edge switching device S ' a, S ' b, S ' c constitute a pair of, and three pairs rising edge, negative edge switching device are with (Sa﹠amp parallel with one another altogether; S ' a, Sb﹠amp; S ' b, Sc﹠amp; S ' c) connect, inverse parallel is connected with diode in each switching device Sa, S ' a, Sb, S ' b, Sc, S ' c.
Switching device in the phase inverter 520 is the on/off operation that each switching device is carried out on the basis with the phase inverter switch-over control signal Sic from control part 530, thus, will export the three-phase alternating-current supply with set frequency from threephase motor 550.
And, also comprise shunt resistance Ra, the Rb, the Rc that are connected with each negative edge switching device S ' a, S ' b, S ' c in the phase inverter 520, use when three-phase current ia, the ib that shunt resistance Ra, Rb, Rc flow in detecting phase inverter 520, ic.
Current detecting part 540 can receive the signal that is used to detect the phase inverter output current from shunt resistance Ra, Rb, each two ends of Rc, detects three-phase current ia, the ib that flows in the phase inverter 520, the current value of ic, and offers control part 530.
In order to control the blocked operation of phase inverter 520, control part 530 is exported to phase inverter 520 with phase inverter switch-over control signal Sic, phase inverter switch-over control signal Sic is the PWM switch-over control signal, and it serves as that the basis generates and output with detection current value ia, ib, ic from current detecting part 540.
Be provided with stator and rotor in the threephase motor 550, and on the coil of the stator of each phase, insert each cross streams power supply of set frequency,, variforms such as BLDC motor, synRM motor can be arranged as the kind of motor so that rotor is rotated.
The interior fan of off-premises station that threephase motor 550 can be used as air conditioner uses with motor or electric motor for compressor, or, use with motor as the fan in the indoor set of air conditioner.
In addition, be provided with switching device and carry out under the situation of blocked operation in converter 510, control part 530 can be controlled converter, for this reason, also can be provided with input current detecting device, dc terminal voltage pick-up unit.
Abovely embodiment among the present invention is illustrated with reference to accompanying drawing, but, under the situation that does not change technological thought of the present invention or essential feature, those skilled in the art under the present invention can other concrete forms implement technical formation of the present invention, therefore, more than the embodiment of Ji Shuing all is exemplary in all respects, rather than be intended to limit the present invention, scope of the present invention should be by making an explanation in the appending claims and limiting, and all changes that the implication of accessory rights claim and scope and impartial with it notion derive or the form of distortion should be understood that to belong to scope of the present invention.
Claims (7)
1. output current detection circuit of phase inverter, the present invention is characterized in that, comprises with lower member:
Be provided with a plurality of with in order the direct supply of input to be converted to the resistance section of the resistive element that the switching device of the phase inverter of AC power is connected by blocked operation;
The signal that will be used to detect the phase inverter output current at each two ends of resistive element sends the connecting portion of current detecting part to;
The current detecting part of the output current by the input phase inverter that transmits from the two ends of each resistive element.
2. output current detection circuit of phase inverter according to claim 1 is characterized in that:
Be provided with three resistive elements that are used for detecting respectively the phase inverter output current corresponding in the above-mentioned resistance section with three of motor.
3. output current detection circuit of phase inverter according to claim 1 is characterized in that:
Comprise also that in above-mentioned a plurality of resistive elements lower end the excess current that flows that is used for detection of excessive current detects resistance.
4. output current detection circuit of phase inverter according to claim 1 is characterized in that:
Above-mentioned resistive element is made of shunt resistance.
5. output current detection circuit of phase inverter according to claim 1 is characterized in that:
In order to detect the phase inverter output current, above-mentioned connecting portion detects voltage signal at each two ends of above-mentioned resistive element, and sends above-mentioned current detecting part to.
6. output current detection circuit of phase inverter according to claim 1 is characterized in that:
Comprise the rising edge switching device that will be connected in series mutually and negative edge switching device in the above-mentioned phase inverter as a pair of, with three pairs of rising edges, the negative edge switching device of connection parallel with one another,
And above-mentioned resistive element is connected with above-mentioned each negative edge switching device.
7. output current detection circuit of phase inverter according to claim 6 is characterized in that:
Above-mentioned connecting portion is switched on and in the process of motor supplying electric current, detects the signal that is used to detect the phase inverter output current at three negative edge switching devices of above-mentioned phase inverter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090072106A KR101037745B1 (en) | 2009-08-05 | 2009-08-05 | Output current sensing circuit for inverter |
| KR10-2009-0072106 | 2009-08-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101839940A true CN101839940A (en) | 2010-09-22 |
| CN101839940B CN101839940B (en) | 2012-07-04 |
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ID=42743440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101778040A Expired - Fee Related CN101839940B (en) | 2009-08-05 | 2010-05-09 | Output current detection circuit of phase inverter |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101037745B1 (en) |
| CN (1) | CN101839940B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106687751A (en) * | 2014-09-26 | 2017-05-17 | 三菱电机株式会社 | Indoor unit and air conditioning apparatus |
| CN109669064A (en) * | 2017-10-17 | 2019-04-23 | 维洛西门子新能源汽车法国简式股份公司 | For measuring the sensor of the output electric current of electrical system and including its sub-assembly |
| CN112422019A (en) * | 2020-11-10 | 2021-02-26 | 广东交通职业技术学院 | Universal application circuit and method for three-phase, two-phase and single-phase resistance sampling |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101890680B1 (en) * | 2014-10-15 | 2018-08-22 | 엘에스산전 주식회사 | Apparatus for detecting ground fault of three phase photovoltaic pcu and method for detecting ground fault of three phase photovoltaic pcu |
| KR102036578B1 (en) * | 2018-05-09 | 2019-10-25 | 엘에스산전 주식회사 | Apparatus for detecting output phase open in inverter |
| KR102050395B1 (en) * | 2018-08-30 | 2019-11-29 | 현대위아(주) | Apparatus for measuring current of high voltage inverter |
| KR102181652B1 (en) * | 2019-10-10 | 2020-11-23 | 엘지전자 주식회사 | Apparatus for controlling motor and motor control method thereof |
| US12092664B2 (en) | 2022-06-30 | 2024-09-17 | Avago Technologies International Sales Pte. Limited | Layout for integrated resistor with current sense functionality |
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| JPH03230767A (en) * | 1990-02-01 | 1991-10-14 | Toshiba Corp | Phase current detector in three-phase pwm inverter device |
| CN1135271A (en) * | 1994-07-25 | 1996-11-06 | 大金工业株式会社 | High efficiency motor apparatus and method for controlling same |
| CN1681195A (en) * | 2004-04-07 | 2005-10-12 | 松下电器产业株式会社 | Motor driving unit of tableware washing apparatus |
| JP2005304176A (en) * | 2004-04-12 | 2005-10-27 | Matsushita Electric Ind Co Ltd | Motor driver |
| JP2006271048A (en) * | 2005-03-23 | 2006-10-05 | Matsushita Electric Ind Co Ltd | Motor driving device |
| TW200814500A (en) * | 2006-09-11 | 2008-03-16 | System General Corp | Detection circuitto detect input voltageof transformer and the detecting method for the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5233629A (en) * | 1991-07-26 | 1993-08-03 | General Instrument Corporation | Method and apparatus for communicating digital data using trellis coded qam |
-
2009
- 2009-08-05 KR KR1020090072106A patent/KR101037745B1/en active IP Right Grant
-
2010
- 2010-05-09 CN CN2010101778040A patent/CN101839940B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03230767A (en) * | 1990-02-01 | 1991-10-14 | Toshiba Corp | Phase current detector in three-phase pwm inverter device |
| CN1135271A (en) * | 1994-07-25 | 1996-11-06 | 大金工业株式会社 | High efficiency motor apparatus and method for controlling same |
| CN1681195A (en) * | 2004-04-07 | 2005-10-12 | 松下电器产业株式会社 | Motor driving unit of tableware washing apparatus |
| JP2005304176A (en) * | 2004-04-12 | 2005-10-27 | Matsushita Electric Ind Co Ltd | Motor driver |
| JP2006271048A (en) * | 2005-03-23 | 2006-10-05 | Matsushita Electric Ind Co Ltd | Motor driving device |
| TW200814500A (en) * | 2006-09-11 | 2008-03-16 | System General Corp | Detection circuitto detect input voltageof transformer and the detecting method for the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106687751A (en) * | 2014-09-26 | 2017-05-17 | 三菱电机株式会社 | Indoor unit and air conditioning apparatus |
| CN109669064A (en) * | 2017-10-17 | 2019-04-23 | 维洛西门子新能源汽车法国简式股份公司 | For measuring the sensor of the output electric current of electrical system and including its sub-assembly |
| CN112422019A (en) * | 2020-11-10 | 2021-02-26 | 广东交通职业技术学院 | Universal application circuit and method for three-phase, two-phase and single-phase resistance sampling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101839940B (en) | 2012-07-04 |
| KR20110014438A (en) | 2011-02-11 |
| KR101037745B1 (en) | 2011-05-27 |
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