CN1284296C - Motor-locking protection circuit, integrated circuit and motor-locking protection method - Google Patents
Motor-locking protection circuit, integrated circuit and motor-locking protection method Download PDFInfo
- Publication number
- CN1284296C CN1284296C CNB2004100637374A CN200410063737A CN1284296C CN 1284296 C CN1284296 C CN 1284296C CN B2004100637374 A CNB2004100637374 A CN B2004100637374A CN 200410063737 A CN200410063737 A CN 200410063737A CN 1284296 C CN1284296 C CN 1284296C
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- Prior art keywords
- drive coil
- motor
- lock
- signal
- circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/12—Monitoring commutation; Providing indication of commutation failure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/24—Arrangements for stopping
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Protection Of Generators And Motors (AREA)
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The lock protective circuit includes a starting pulse output circuit for outputting a starting pulse in a locked state in which the motor with current supplied to a drive coil is stopped, a starting pulse measuring means for counting the starting pulses, a lock state detecting means for detecting the lock state in response to the counted result, and a drive coil current interruption control means for performing a control for cutting off the current to the drive coil when the lock state is detected.
Description
Technical field
The present invention relates to motor-locking protection circuit, integrated circuit and motor-locking protection method.
Background technology
Be absorbed under the situation of lock-out state (state that rotation stops) at the motor that is used for cooling fan etc., the locking protection circuit of the current cut-off of motor-driven coil for example be disclosed in (Japan) spy open in the 2001-57793 communique (patent documentation).In this locking protection circuit, shown in Figure 1 as this communique utilized external capacitor.That is, when being absorbed in lock-out state, CSET is recharged, if its terminal voltage reaches setting, then is judged to be lock-out state, carries out locking protection action.
As this locking protection action, having more than is electric current by the motor-driven coil, also carries out the action of restarting behind this current cut-off sometimes.That is,, also set discharge time corresponding to the time constant of CSET from current cut-off (after, only be called " blocking interval ") to the time of restarting.
[patent documentation 1] (Japan) spy opens the 2001-57793 communique
In above-mentioned prior art, needing really in the situation of cooling fan etc. particularly motor to be used for Protect long blocking interval. Therefore, the necessary external relatively capacitor of high capacitance has substrate area Become problem big and that can not avoid cost to rise. And, because the capacitance of capacitor and charging current etc. Messy and blocking interval produce messy, generation can not setting accuracy good during shortcoming.
Summary of the invention
The invention provides a kind of locking protection circuit, have and in the lock-out state that drive coil provides the motor of electric current to stop, exporting the start pulse output circuit of start pulse; It is characterized in that this locking protection circuit comprises: start pulse instrumentation parts, count described start pulse; No sensor logic is compared the result of described counting with setting, when the result of described counting reaches setting, promptly detect described lock-out state; When detecting described lock-out state, implementation will be to the control of the described current cut-off of described drive coil.
The present invention also provides a kind of motor-locking protection method, it is characterized in that, will count the start pulse of output in the lock-out state that drive coil provides the motor of electric current to stop; The result of described counting is compared with setting, when the result of described counting reaches setting, promptly detect described lock-out state; And when detecting described lock-out state, implementation will be to the control of the described current cut-off of described drive coil.
Main invention of the present invention is a kind of locking protection circuit, has to export the start pulse output circuit of start pulse in the lock-out state that drive coil provides the motor of electric current to stop; This locking protection circuit comprises: start pulse instrumentation parts, count described start pulse; The lock-out state detection part detects described lock-out state according to the result of described counting; And drive coil current cut-off parts, when detecting described lock-out state, implementation will be to the control of the described current cut-off of described drive coil.
Therefore, when the detection of the lock-out state of motor, do not rely on the action that discharges and recharges of CSET, and detect by the instrumentation start pulse.Owing to do not use CSET, circuit area is diminished, can reduce the cost simultaneously.
For other features of the present invention, can understand by the description of accompanying drawing and this specification.
Description of drawings
Fig. 1 is the circuit block diagram of the motor-drive circuit of expression one embodiment of the present invention.
Fig. 2 is the flow chart of the locking protection action of expression one embodiment of the present invention.
Fig. 3 is the circuit block diagram of structure example of the pulse counter of expression one embodiment of the present invention.
Fig. 4 is the chart that the logical value of the circuit that moves is protected in the realization locking of expression one embodiment of the present invention.
Embodiment
The overall structure of===motor-drive circuit===
With reference to the circuit block diagram of Fig. 1, the overall structure of motor-drive circuit of the present invention is described.Have, this drive circuit is implemented in the mode of integrated circuit again.In addition, in the present embodiment, motor is the non-sensor type motor of element (for example, Hall element) with the relative position that is used for detection rotor and stator.As shown in Figure 1,, have the electric power angle of 120 degree simultaneously, be fixed on the non-sensor type motor U phase drive coil 2, V phase drive coil 4,6 Y-connections of W phase drive coil.
In order to give U phase drive coil 2 energisings (electric current is provided), so N channel-type MOSFET8 is the transistor of supply side, N channel-type MOSFET10 is the transistor of suction side.N channel-type MOSFET8,10 drain-source loop are connected in series between power supply Vp and the ground connection, simultaneously its drain-source connecting portion and the U end connection of drive coil 2 mutually.
Similarly, in order to give V phase drive coil 4 energisings, so N channel-type MOSFET12 is the transistor of supply side, N channel-type MOSFET14 is the transistor of suction side.N channel-type MOSFET12,14 drain-source loop are connected in series between power supply Vp and the ground connection, simultaneously its drain-source connecting portion and the V end connection of drive coil 4 mutually.
In addition, similarly, in order to give W phase drive coil 6 energisings, so N channel-type MOSFET16 is the transistor of supply side, N channel-type MOSFET18 is the transistor of suction side.N channel-type MOSFET16,18 drain-source loop are connected in series between power supply Vp and the ground connection, simultaneously its drain-source connecting portion and the W end connection of drive coil 6 mutually.
Thereby, by turn-off these N channel-types MOSFET8,10,12,14,16,18 with suitable timing conducting, drive current flows through in U phase drive coil 2, V phase drive coil 4, W phase drive coil 6, and the rotor of non-sensor type motor is for example by the positive direction rotation.In this spinning movement, driving voltage Vu, Vv, the Vw of the phase difference of spending at electric power angle 120 on an end of U phase drive coil 2, V phase drive coil 4, W phase drive coil 6, occur having, on the shared connecting portion of U phase drive coil 2, V phase drive coil 4, W phase drive coil 6, neutral point voltage Vcom occurs simultaneously.Have again,, can use bipolar transistor to replace MOSFET as driving transistors.
Commutation circuit 20 has U terminal, V terminal, W terminal, provides driving voltage Vu, Vv, Vw to U terminal, V terminal, W terminal.Commutation circuit 20 is pressed timing switching U terminal, V terminal, the W terminal of electric power angle 60 degree, outputting drive voltage Vu, Vv, Vw.When the non-sensor type motor was rotated in the forward, the reiteration that commutation circuit 20 is pressed U terminal, W terminal, V terminal switched, and when the reverse rotation of non-sensor type motor, the reiteration that commutation circuit 20 is pressed U terminal, V terminal, W terminal switches.
Comparator 22 will compare from driving voltage Vu, Vv, one of them of Vw and the voltage Vcom (terminal) of neutral point that this commutation circuit obtains.Thus, press the comparison signal of the rectangle of the timing variation of spending at electric power angle 60 by comparator 22 outputs.
Distributor circuit 32 has U terminal, V terminal, W terminal, switches U terminal, V terminal, W terminal according to the timing identical with commutation circuit 20.Have, when the non-sensor type motor was rotated in the forward, the reiteration that distributor circuit 32 is pressed U terminal, W terminal, V terminal switched again, and when the reverse rotation of non-sensor type motor, the reiteration of pressing U terminal, V terminal, W terminal switches.
Only obtain the part signal that electric power angle 60 is spent from the U terminal of distributor circuit 32, the signal of electric power angle 120 degree of U phase drive coil 2 energisings is weak.Similarly, also only obtain the part signal of electric power angle 60 degree, the signal of electric power angle 120 degree of V phase drive coil 4 energisings is weak from the V terminal of distributor circuit 32.In addition similarly, also only obtain the part signal of electric power angle 60 degree, the signal of electric power angle 120 degree of W phase drive coil 6 energisings is weak from the W terminal of distributor circuit 32.
Screened circuit 34 is removed the noise corresponding to recoil impulse from the signal of electric power angle 60 degree of the U terminal acquisition of distributor circuit 32.Signal with these electric power angle 60 degree generates continuous shielded signal Umask and the output that is used to drive U phase drive coil 2.Similarly, from the signal of electric power angle 60 degree that the V terminal of distributor circuit 32 obtains, remove noise corresponding to recoil impulse.Signal with these electric power angle 60 degree generates continuous shielded signal Vmask and the output that is used to drive V phase drive coil 4.In addition similarly, from the signal of electric power angle 60 degree that the W terminal of distributor circuit 32 obtains, remove noise corresponding to recoil impulse.Signal with these electric power angle 60 degree generates continuous shielded signal Wmask and the output that is used to drive W phase drive coil 6.Have, shielded signal Umask, Vmask, Wmask have the phase difference of electric power angle 120 degree again.
Combiner circuit 38 will be synthetic from shielded signal Umask, Vmask, Wmask that screened circuit 34 obtains, the composite signal FG output of the rectangle that will change by the timing of electric power angle 60 degree.That is, composite signal FG becomes the signal of removing from the overlapping pulses based on recoil impulse of comparison signal CP.
Phase comparator 40, filter 42, buffer 44, voltage controlled oscillator 46,1/N frequency divider 48 constitute the PLL circuit.The composite signal FG that phase comparator 40 will obtain from combiner circuit 38 and have voltage signal output with the corresponding pulse duration of phase difference of the fractional frequency signal DV that obtains from 1/N frequency divider 48.For example, under the state that the phase place of composite signal FG shifts to an earlier date than the phase place of frequency division signal DV, the positive voltage signal of phase comparator 40 outputs, and under the state of phase place than the phase lag of frequency division signal DV of composite signal FG, the negative voltage signal of phase comparator 40 outputs.This voltage signal is provided for voltage controlled oscillator 46 via buffer 44 after being integrated in filter 42.This voltage controlled oscillator 46 will offer 1/N frequency divider 48 corresponding to the frequency signal VCO output of the voltage signal that obtains from buffer 44.By carrying out this action repeatedly, make the phase place of composite signal FG consistent with the phase place of fractional frequency signal DV.
No sensor logic 52 will make the signal output of U phase drive coil 2, V phase drive coil 4,6 energisings of W phase drive coil by suitable timing.Because electric machine without sensor self be can not determine rotor in the A-stage and the relative position between the stator, no sensor logic 52 begins to move from the predetermined initial stage level of Umask, Vmask, Wmask.Thereby during power on signal Ulogic1 became " M " level, 52 outputs of no sensor logic were used to select the signal of the U terminal of the U terminal of switching signal 20 and distributing signal 32.Similarly, during power on signal Vlogic1 became " M " level, 52 outputs of no sensor logic were used to select the signal of the V terminal of the V terminal of switching signal 20 and distributing signal 32.In addition similarly, during power on signal Wlogic1 became " M " level, 52 outputs of no sensor logic were used to select the signal of the W terminal of the W terminal of switching signal 20 and distributing signal 32.Then, power on signal Ulogic2, Vlogic2, the Wlogic2 that no sensor logic 52 generates and output postpones than power on signal Ulogic1, Vlogic1, Wlogic1.
Positive circnit NOT 54 generates and output makes the brake of electric machine without sensor and the drive signal of the action that direction of rotation is reversed.That is, the brake index signal that positive circnit NOT 54 provides based on external device (ED) etc., output reverse torque brake drive signal.
The situation that is absorbed in lock-out state (state that rotor stops the rotation) at electric machine without sensor is inferior, starting counter 58 (start pulse output circuit) is in the state of the rotation number that does not reach regulation, the timing of spending with the electric power angle 60 of composite signal is that benchmark is counted, when having counted setting, generate start pulse and output.Then, pulse counter (start pulse instrumentation parts) 60 is accepted this start pulse.Pulse counter 60 counting start pulses output to no sensor logic 52 with the result.This no sensor logic (lock-out state detection part) 52 detects it and is lock-out state according to the count results of accepting.
===locking protection===
According to the flow chart of Fig. 2 and with reference to the circuit block diagram of Fig. 1, the electric machine without sensor in prior art Xiang Zhongyi explanation is absorbed under the situation of lock-out state (state that rotor stops the rotation), do not reach the rotation number status detection of hope and the structure and the action of protection describes.
At first, as mentioned above,, then start counter 58 and generate start pulses and output (S100: "Yes" → S200) if rotor becomes the state that stops the rotation.Pulse counter 60 counting these start pulses (S300).If the number n of this start pulse (n is a natural number) does not for example reach 10, then be made as non-locking (unlock) state, pulse counter 60 is proceeded the counting (S400: "Yes" → S300) of start pulse.On the contrary; number n in start pulse surpasses (S400: "No") under 10 the situation; no sensor logic (drive coil current cut-off control assembly) 52 is judged to be lock-out state, and implementation will be to the control of the locking protection of the current cut-off of U phase drive coil 2, V phase drive coil 4, W phase drive coil 6.That is, no sensor logic 52 stops to make the output of the signal of each drive coil 2,4,6 energising.Have again, as described later, by setting the structure of pulse counter 60, can suitably change the time (the number n=10 of start pulse) that becomes the index of judging lock-out state.
After having carried out this locking protection control back and process official hour; promptly; reach (S600: "Yes") under 100 the situation at the number n of start pulse; no sensor logic 52 (restarting parts) enters a series of judgements of latch-release state; assert that simultaneously becoming lock-out state also may fully cool off by warmed-up electric machine without sensor, carries out the control that electric current is provided once more to each drive coil 2,4,6.That is, no sensor logic 52 is exported the signal that is used for to 2,4,6 energisings of each drive coil once more, turns back to the processing of described S100.Specifically, no sensor logic 52 changes to the level of shielded signal Umask, Vmask, Wmask the level of next electric power angle 60 degree.Thus, can restart electric machine without sensor.Have again, as described later,, can suitably change locking guard time (to the turn-off time of restarting, the number n=100 of start pulse) by the hope of the electric current of each coil 2,4,6 by setting the structure of pulse counter 60.
The structure example of===pulse counter===
The structure of above-mentioned pulse counter only is an example, as a reference, carries out simple explanation with reference to the block diagram of Fig. 3.For convenience, in Fig. 3, also put down in writing a part of structural circuit part (inverter, AND circuit, constant-current circuit, pullup resistor R and npn type bipolar transistor) of the no sensor logic of moving by the pulse counter 60 and the association of dotted line 52.As shown in Figure 3, pulse counter 60 is connected by the D flip-flop with a plurality of input start pulses or reset signal and constitutes.That is, the d type flip flop cascade (cascade) of D terminal with the counter-rotating Q short-circuit of terminals is connected, as frequency dividing circuit work.Corresponding to the described time (the number n=10 of start pulse) that becomes the index of judging lock-out state of Fig. 2, the D flip-flop of Fig. 3 is provided with J (J is the natural number of for example " 8 " etc.).In addition, the corresponding locking guard time (the number n=100 of start pulse) of setting the hope of the current cut-off that makes each coil 2,4,6, the D flip-flop of Fig. 3 have (J+K) individual (K is the natural number of for example " 64 " etc.).
As shown in Figure 3, be input to the signal A of inverter, the output signal D that is input to two signal B, C of AND circuit and AND circuit becomes the value (" H " or " L ") corresponding to reset mode, lock-out state and starting (restarting) shown in the chart of the presentation logic value of Fig. 4.According to these signals A to D, be provided for controlling the signal that electric current is provided to each coil 2,4,6 from the emitter of NPN transistor.
More than understand embodiments of the present invention specifically based on this execution mode, but be not limited thereto, in the scope that does not break away from its aim, various distortion can be arranged.
Present embodiment has following effect and effect.
Detection for the lock-out state of motor does not rely on the action that discharges and recharges of CSET, and detects by the instrumentation start pulse.Therefore, do not need CSET.
Do not use CSET and the instrumentation start pulse.Therefore, the instrumentation result's of corresponding start pulse setting, decision is to the turn-off time of restarting.Therefore, compare as decision discharge time to the turn-off time of restarting, can guarantee the high-precision turn-off time with the analogue value with CSET.
Setting corresponding to the instrumentation result of start pulse can be set to the turn-off time of restarting.Therefore, compare with the situation of using CSET, it is easy that the setting of turn-off time becomes.
Owing to do not use CSET, can reduce circuit area, can realize low cost simultaneously.
Claims (4)
1. a locking protection circuit has and will export the start pulse output circuit of start pulse in the lock-out state that drive coil provides the motor of electric current to stop;
It is characterized in that this locking protection circuit comprises:
Start pulse instrumentation parts are counted described start pulse; And
No sensor logic is compared the result of described counting with setting, when the result of described counting reaches setting, promptly detect described lock-out state; When detecting described lock-out state, implementation will be to the control of the described current cut-off of described drive coil.
2. motor-locking protection circuit as claimed in claim 1; it is characterized in that also comprising and restart parts; these parts are in that carried out will be after the described control of the described current cut-off of described drive coil; if the result of the described counting that is obtained by described start pulse instrumentation parts reaches setting, then carry out the control that described electric current is provided to described drive coil once more.
3. motor-locking protection circuit as claimed in claim 2 is characterized in that, described setting was set according to the hope time of the described electric current that ends described drive coil.
4. a motor-locking protection method is characterized in that, will count the start pulse of output in the lock-out state that drive coil provides the motor of electric current to stop;
The result of described counting is compared with setting, when the result of described counting reaches setting, promptly detect described lock-out state; And
When detecting described lock-out state, implementation will be to the control of the described current cut-off of described drive coil.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003204277A JP2005051870A (en) | 2003-07-31 | 2003-07-31 | Lock protective circuit of motor and integrated circuit, and method for protecting lock of motor |
| JP204277/03 | 2003-07-31 | ||
| JP204277/2003 | 2003-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1581672A CN1581672A (en) | 2005-02-16 |
| CN1284296C true CN1284296C (en) | 2006-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100637374A Expired - Fee Related CN1284296C (en) | 2003-07-31 | 2004-07-07 | Motor-locking protection circuit, integrated circuit and motor-locking protection method |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2005051870A (en) |
| KR (1) | KR100642171B1 (en) |
| CN (1) | CN1284296C (en) |
| TW (1) | TWI275239B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4879645B2 (en) * | 2005-07-12 | 2012-02-22 | ローム株式会社 | Motor drive device and electric apparatus using the same |
| KR100811659B1 (en) * | 2007-01-17 | 2008-03-11 | 삼성전자주식회사 | Method for control starting of compressor including brushless dc motor |
| JP4972439B2 (en) * | 2007-03-26 | 2012-07-11 | オンセミコンダクター・トレーディング・リミテッド | Motor restraint detection circuit |
| JP5405840B2 (en) * | 2009-01-23 | 2014-02-05 | セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー | Motor speed control device |
| CN102820842B (en) * | 2011-06-10 | 2015-01-14 | 尼克森微电子股份有限公司 | Motor driving device and lockout protection and standby control circuit for same |
| JP2015070727A (en) * | 2013-09-30 | 2015-04-13 | サンケン電気株式会社 | Motor driver |
| CN105846755B (en) * | 2015-01-14 | 2019-04-19 | 南京德朔实业有限公司 | The control method of electric tool and motor |
| JP6633024B2 (en) * | 2017-05-24 | 2020-01-22 | ミネベアミツミ株式会社 | Motor drive control device and motor drive control method |
| TWI731413B (en) * | 2019-09-11 | 2021-06-21 | 茂達電子股份有限公司 | Motor driving device having lock protection mode |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960023409A (en) * | 1994-12-10 | 1996-07-20 | 구자홍 | Washing machine rotation control device and method of washing machine |
| KR19990018530A (en) * | 1997-08-27 | 1999-03-15 | 윤종용 | How to check the motor failure of the washing machine |
| JP4015324B2 (en) | 1999-08-16 | 2007-11-28 | カルソニックカンセイ株式会社 | Brushless motor control device with lock judgment function |
| JP2001145380A (en) | 1999-11-15 | 2001-05-25 | Fuji Xerox Co Ltd | Abnormal motor stop device and detection device |
| KR20010048542A (en) * | 1999-11-27 | 2001-06-15 | 구자홍 | A controlling method of water current for washer |
-
2003
- 2003-07-31 JP JP2003204277A patent/JP2005051870A/en active Pending
-
2004
- 2004-06-21 TW TW093117891A patent/TWI275239B/en not_active IP Right Cessation
- 2004-07-07 CN CNB2004100637374A patent/CN1284296C/en not_active Expired - Fee Related
- 2004-07-30 KR KR1020040060048A patent/KR100642171B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| TWI275239B (en) | 2007-03-01 |
| KR100642171B1 (en) | 2006-11-03 |
| CN1581672A (en) | 2005-02-16 |
| JP2005051870A (en) | 2005-02-24 |
| TW200507436A (en) | 2005-02-16 |
| KR20050014735A (en) | 2005-02-07 |
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Granted publication date: 20061108 Termination date: 20210707 |