CN1216453C - Motor controller - Google Patents
Motor controller Download PDFInfo
- Publication number
- CN1216453C CN1216453C CN011394668A CN01139466A CN1216453C CN 1216453 C CN1216453 C CN 1216453C CN 011394668 A CN011394668 A CN 011394668A CN 01139466 A CN01139466 A CN 01139466A CN 1216453 C CN1216453 C CN 1216453C
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- China
- Prior art keywords
- voltage
- circuit
- motor
- phase
- control
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- 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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/085—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
To provide a position-sensorless motor controller which can carry out control, taking into consideration the influence of an armature reaction against a phase induced voltage and a control effect delay against a power supply ripple to suppress speed fluctuation, noise, and vibration. When a rotor position of a three-phase motor 3 is estimated, according to the phase induced voltage of the motor 3 detected by a phase voltage detecting means 5a, a control means 5 corrects the leading phase angle of the phase induced voltage caused by the influence of armature reaction, depending on the current of the three-phase motor 3 which is estimated according to the PWM signal pulse width, revolution, and a power supply voltage Vdc, in a current-sensorless manner for estimating the proper rotor position.
Description
Technical field
The present invention relates to use single phase alternating current power supply and variable-ratio ground to drive the control device of electric motor of threephase motor.
Background technology
Below, describe in the past control device of electric motor.
(the 1st conventional art, the spy opens flat 10-150795 communique)
Fig. 4 represents the structure of the control device of electric motor in the 1st conventional art.Control device of electric motor possesses: the rectification circuit 2 that single phase alternating current power supply 1 is carried out full-wave rectification; The output of rectification circuit 2 is changed in utilization and the converter main circuit 4 that drives threephase motor 3 is exported in the interchange that obtains variable voltage, variable frequency; The control device 5 of control inverter main circuit 4; The position transducer 6 of information of the rotor-position of threephase motor 3 is provided.
(the 2nd conventional art spy opens the 2000-83397 communique)
Fig. 5 is the structure of the control device of electric motor of expression the 2nd conventional art.Control device of electric motor possesses: the rectification circuit 2 that single phase alternating current power supply 1 is carried out full-wave rectification; Utilize the variable voltage of the rectification output acquisition of conversion rectification circuit 2, the interchange of variable frequency to export the converter main circuit 4 that drives threephase motor 3; The control circuit 5 of control inverter main circuit 4.Here, control circuit 5 possesses: the phase voltage testing circuit 5a of the terminal voltage of the threephase motor 3 in detecting during the zero load of same switch element in mutually; The phase current sign change testing circuit 5b in the moment that the phase current symbol of the described terminal voltage that the next free phase voltage testing circuit 5a of detection detects changes; Produce the switch element modulation circuit 5c of pwm signal according to described phase current the symbol moment that changes and the phase difference that applies voltage mutually.
In above-mentioned structure, by the terminal voltage of middle threephase motor 3 during the zero load that utilizes phase voltage testing circuit 5a sense switch element, detect the symbol of phase current thus, utilize phase current sign change testing circuit 5b to detect the sign change of this phase current.Infer constantly according to the phase current sign change that detects and the rotor-position of threephase motor 3 to utilize switch element modulation circuit 5c, control this phase current sign change constantly and the phase difference that applies voltage mutually.
Possess as filtering with and the condenser input type rectification circuit 2 of the enough jumbo electric capacity 7 used of regenerative current as shown in Figure 6, have the impulse current that constitutes by resistance 8a and relay 8b and prevent circuit 8.Impulse current prevents that circuit 8 charges to electric capacity 7 by resistance 8a when inserting power supply, prevent impulse current thus, after this, and engage relay 8b and with resistance 8a short circuit.Thus, the instantaneous decline of voltage that can prevent single phase alternating current power supply 1 when inserting power supply causes the misoperation of surrounding devices.
In the control device of electric motor that the 1st above-mentioned conventional art is disclosed, owing to utilize position transducer to detect the necessary rotor position information of drive motor, position transducer 6 can not be realized driving with the air-tight state that is exposed to excessive temperature, the compressor under the pressure condition etc.Again, if the driving method of the position-sensor-free in the past that the 2nd above-mentioned conventional art of employing is disclosed, then increase the control device of electric motor that weakens magnetic field control for the phase current that adopts in the output calibration with the converter main circuit 4 of the low capacityization of electric capacity 7, owing to utilize the influence of leading phase angle of the phase induced voltage of armature reaction to become big, for the conventional art of inferring rotor-position according to the induced voltage of threephase motor 3, the location is detected error and is become big problem.
Again because the power supply ripple after single phase alternating current power supply 1 rectification is the frequency of 2 times of supply frequencies, so must utilize pwm signal pulse duration increase and decrease control and weaken magnetic field and control and proofread and correct for the power supply ripple of 100Hz or 120Hz.The driving of such effect that correction brought to practical function in motor need be through during certain.Therefore, carry out in the above-mentioned control method of above-mentioned correction, can not suppress revolution change and thereupon vibration, noise fully as the threephase motor 3 of driven object on real-time ground.
Moreover, when the capacity of the electric capacity between the output that is connected rectification circuit 27 is very big, in order to prevent when inserting power supply, electric capacity 7 to be charged and flow into impulse current, prevent circuit 8 so must insert impulse current, the problem that exists components number to increase like this.
Summary of the invention
The present invention is to provide a kind of control device of electric motor in order to address the above problem purpose, in this electronic device, reduce the capacity of electric capacity 7 or omit electric capacity 7 and do not need impulse current to prevent circuit 8, inferring in the method for rotor-position according to the phase induced voltage of threephase motor 3, the rotor-position of the leading phase angle by having considered the phase induced voltage that the armature reaction that depends on motor current causes is inferred, can correctly infer rotor-position, again, carry out pwm signal pulse duration increase and decrease control and weaken magnetic field control, the vibration that can suppress the revolution change and bring thus by the power supply ripple of prediction along with electric capacity 7 low capacityizatioies, noise etc. and can stably driving.
In order to reach above-mentioned purpose, control device of electric motor of the present invention possesses: the rectification circuit that carries out full-wave rectification for the output of single phase alternating current power supply; Be connected between the output of rectification circuit and flow through from electric capacity as the regenerative current of the motor of driven object; Utilize switching to be applied to voltage on the described electric capacity and the variable voltage that obtains, the interchange of variable frequency are exported the converter main circuit that drives described motor; Control the control circuit of this device molar behavior, wherein, described electric capacity has the capacity that is had for necessary capacity and the described electric capacity of bottom line that suppresses radio-frequency component can make the minimum voltage value with power supply ripple produce the necessary torque of described motor, described control circuit is done sth. in advance the output time of described pwm signal by the pulse duration increase and decrease control of the pwm signal of the switch element in the described converter main circuit and when the pulse duration by described pwm signal increases the saturation condition of the inverter output voltage that control can not obtain to be equivalent to described voltage instruction value and makes leading the weakening of the phase place of inverter output voltage to infer that according to the phase induced voltage of having considered the armature reaction that depends on described electric electromechanics flow rotor-position carries out the driving of position-sensor-free during magnetic field controls carrying out connecting according to voltage instruction value.
The accompanying drawing summary
Fig. 1 is the block diagram of the structure of expression control device of electric motor one embodiment of the present invention.
Fig. 2 is that expression is because the oscillogram of the leading phase angle of the induced voltage that armature reaction causes.
Fig. 3 is the oscillogram in the moment of expression power supply ripple and correction.
Fig. 4 is the block diagram of representing in the past that power supply ripple is proofreaied and correct the structure of the control device of electric motor of controlling that carries out.
Fig. 5 is a block diagram of representing the structure that carries out position-sensor-free drive electric motor control device in the past.
Fig. 6 represents that impulse current in the example in the past prevents the circuit diagram of the structure of circuit.
Concrete example
Below, the embodiment for control device of electric motor of the present invention describes with reference to accompanying drawing.
Fig. 1 is the block diagram of structure of the control device of electric motor of expression present embodiment, the oscillogram of the leading phase angle of Fig. 2 induced voltage that to be expression cause because of armature reaction, and Fig. 3 is the oscillogram of expression power supply ripple and corrected time.Partly adopt prosign for the identical construction of example in the past with Fig. 6 again.
The control device of electric motor of present embodiment shown in Figure 1 possesses: the rectification circuit 2 that single phase alternating current power supply 1 is carried out rectification; Be used to flow through from as the regenerative current of the threephase motor 3 of driven object and be connected the electric capacity 7 of the low capacity between the output of rectification circuit 2; The end power conversion of electric capacity 7 is become the converter main circuit 4 of the interchange output of variable voltage, variable frequency; Control circuit 5.Impulse current did not cause that the impulse current of surrounding devices misoperation prevents circuit when the control device of electric motor of present embodiment was provided for preventing the power supply access.
The control device of electric motor of present embodiment utilizes phase voltage testing circuit 5a, phase current sign change testing circuit 5b, switch element modulation circuit 5c, current value to infer that circuit 5d has considered the phase control of the leading phase angle of the phase induced voltage that armature reaction causes, again, consider the delay that affacts till the motor driven, utilize described switch element modulation circuit 5c, phase current sign change testing circuit 5b, supply frequency testing circuit 5e to carry out the increase and decrease control and the field weakening control of the pulse duration of pwm signal.
In above-mentioned Motor Control, at random set the moment that the symbol that applies voltage instruction mutually from switch element modulation circuit 5c changes and utilize the phase difference in the moment that the symbol of the phase current that phase voltage testing circuit 5a and phase current sign change testing circuit 5b detect changes, the control of above-mentioned phase difference is because of identical with in the past technology, so detailed here.
At first, the control for the leading phase angle of considering the phase induced voltage that armature reaction causes describes.Phase induced voltage when not switching on is shown in figure (2).Yet, in fact when driving the energising of threephase motor 3,, make the phase induced voltage shown in Fig. 2 (b) because armature reaction causes the stack of voltage shown in Fig. 2 (c).Yet, for the purpose of simplifying the description, will represent with square wave by the voltage that armature reaction produces.So, when being subjected to armature reaction, the zero crossing of the phase induced voltage then phase induced voltage when not switching on is leading.Again, because the influence that this armature reaction causes depends on motor current, when the magnitude of current increased, the leading degree of the zero crossing of phase induced voltage also became greatly, is θ 1＜θ 2.Therefore, in the phase control of the rotor-position of inferring threephase motor 3 according to the phase current sign change point of phase voltage testing circuit 5a and phase current sign change testing circuit 5b, detection rotor positional information correctly.
Here, owing to consider influence, proofread and correct the rotor position information that obtains from phase current sign change testing circuit 5b and carry out phase control according to the armature reaction of the magnitude of current.Here, current value infers that circuit 5d infers the magnitude of current that is used to judge armature reaction influence size from the pulse duration of voltage Vdc, pwm signal between the output of rectification circuit 2 and the revolution of threephase motor 3.So, by the influence of considering the armature reaction that depends on the magnitude of current and the leading phase angle θ that proofreaies and correct the phase induced voltage, can there be phase control with the position detection error of the magnitude of current.
Then, describe for considering the increase and decrease control of the pulse duration of pwm signal and weakening the delay situation of magnetic field control action till motor driven.Above-mentioned control can suppress owing to the low capacityization of the electric capacity between the output that is connected rectification circuit 27 or not have the revolution change that power supply ripple that electric capacity 7 produces causes.
Here, the cycle of described power supply ripple is half of cycle of single phase alternating current power supply 1 as shown in Figure 3.Therefore, during shown in Figure 3 among the t1 if half period of known single phase alternating current power supply 1, the then cycle of the power supply ripple that will proofread and correct as can be known.Moreover, during Fig. 3 among the t1, carry out the A/D sampling for power supply ripple, with this sampled value serves as that the basis is carried out the increase and decrease control of pulse duration and weakened magnetic field control in t2, thus, can consider that described pulse duration increases and decreases control and weakens the moment of magnetic field control and the correction control of the delay situation in the moment that affacts threephase motor 3.So, by being that the basis is carried out power supply ripple and proofreaied and correct, can suppress the revolution change more reliably than the situation that real-time is proofreaied and correct control thus corresponding to the A/D sampled value of the power supply ripple before the half period of single phase alternating current power supply 1.
Can adopt the value of utilizing step response etc. to measure in advance above-mentioned time of delay again.
Then, the impulse current when not needing to be provided for preventing to insert power supply causes the impulse current of surrounding devices misoperation to prevent that the reason of circuit from describing.In the control device of electric motor of present embodiment, when making that the electric capacity of electric capacity 7 of the output be connected rectification circuit 2 is less or casting out electric capacity 7, the electrorheological that charges for electric capacity 7 when inserting power supply gets small.Therefore, even not being set, impulse current do not prevent that circuit from also can not cause the misoperation of surrounding devices.
According to above-mentioned present embodiment,, can realize the excess temperature under air-tight state, the drivings under the pressure condition like that such as compressor owing to do not adopt position transducer.
Moreover, in for the output calibration of the converter main circuit 4 of following electric capacity 7 low capacityizatioies, adopt the control device of electric motor that weakens magnetic field control that makes that motor current increases, the rotor-position of the influence of the armature reaction that depends on the electric electromechanics flow is considered in detection, can not have position detection error ground stably to drive.At this moment, by inferring the electric electromechanics flow, can not adopt current sensor to come correction position to detect error from the voltage between the output of revolution, pwm signal pulse duration and the rectification circuit 2 of threephase motor 3.Again, the necessary A/D sampled data of correction for the power supply ripple influence, by being adopted the A/D sampled data before the half period every single phase alternating current power supply cycle, need not use the fast high-performance micro computer of A/D sample rate height and disposal ability just can predict power supply ripple and control.
Moreover, by reducing the capacity of electric capacity 7, then do not need impulse current to prevent circuit, so can reduce components number.
Again, the electric capacity of so-called low capacity, in the pwm signal of increase and decrease control do not carry out to(for) power supply ripple and at the output time of pwm signal ahead of time and make that the phase place of inverter output voltage is leading and obtain in the control device of electric motor of desired inverter output, be meant according to the minimum voltage value with power supply ripple can produce motor necessary torque capacitance and can drive the DC motor and for the necessary capacitance of the bottom line that suppresses radio-frequency component.For example, in the domestic air conditioning equipment that is used in the 2.8kW level time, low capacity is meant about 20 μ F the capacitance about 500 μ F.
Claims (8)
1. a control device of electric motor possesses: the rectification circuit that carries out full-wave rectification for the output of single phase alternating current power supply; Be connected between the output of rectification circuit and flow through from electric capacity as the regenerative current of the motor of driven object; Utilize switching to be applied to voltage on the described electric capacity and the variable voltage that obtains, the interchange of variable frequency are exported the converter main circuit that drives described motor; Control the control circuit of this device molar behavior, wherein, described electric capacity has the capacity that is had for necessary capacity and the described electric capacity of bottom line that suppresses radio-frequency component can make the minimum voltage value with power supply ripple produce the necessary torque of described motor, it is characterized in that
Described control circuit is carrying out pulse width increase and decrease control and is weakening in the control of magnetic field according to the voltage of responding to mutually of having considered the armature reaction that depends on described electric electromechanics flow and infer that the rotor position carries out the driving of position-sensor-free; The control object of described pulse width increase and decrease control is for connecting or end the pwm signal of the switch element in the described converter main circuit according to voltage instruction value, described to weaken magnetic field control be pulse width at the described pwm signal output time by doing sth. in advance described pwm signal and so that the phase place of inverter output voltage is leading when increasing the saturation state of the inverter output voltage that control can not obtain to be equivalent to described voltage instruction value.
2. control device of electric motor as claimed in claim 1 is characterized in that,
Described control circuit is from the pulse duration of the voltage between the output of described rectification circuit, pwm signal, the magnitude of current that the motor revolution is inferred motor, the magnitude of current that utilizes described supposition to obtain proofreaies and correct because the leading phase angle of the phase induced voltage that armature reaction causes is inferred rotor-position according to the phase induced voltage after proofreading and correct.
3. control device of electric motor as claimed in claim 1 is characterized in that,
Described control circuit is considered the increase and decrease control of the pulse duration of carrying out pwm signal up to acting on electric motor driven delay and is weakened magnetic field control.
4. control device of electric motor as claimed in claim 1 is characterized in that,
Described control circuit possesses: the phase voltage testing circuit of the terminal voltage of motor between the sense switch element off period; Infer that from the pulse duration of the voltage between the output of described rectification circuit, pwm signal, motor revolution the current value of the magnitude of current of motor infers circuit; The phase current sign change testing circuit in the moment that the output detection phase current symbol of inferring circuit from the output and the current value of phase voltage testing circuit changes; The supply frequency testing circuit; And produce the switch element modulation circuit of pwm signal according to the output of the output of described phase current sign change testing circuit and supply frequency testing circuit,
The switch element of described converter main circuit utilize pwm signal transfer described electric capacity terminal voltage and the terminal voltage of described electric capacity is transformed into the interchange output and the drive motor of variable voltage, variable frequency.
5. control device of electric motor as claimed in claim 1 is characterized in that,
Described control device of electric motor is used in the air-conditioning equipment.
6. control device of electric motor as claimed in claim 2 is characterized in that,
Described control device of electric motor is used in the air-conditioning equipment.
7. control device of electric motor as claimed in claim 3 is characterized in that,
Described control device of electric motor is used in the air-conditioning equipment.
8. control device of electric motor as claimed in claim 4 is characterized in that,
Described control device of electric motor is used in the air-conditioning equipment.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP357281/00 | 2000-11-24 | ||
| JP357281/2000 | 2000-11-24 | ||
| JP2000357281A JP3700576B2 (en) | 2000-11-24 | 2000-11-24 | Motor control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1356767A CN1356767A (en) | 2002-07-03 |
| CN1216453C true CN1216453C (en) | 2005-08-24 |
Family
ID=18829375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN011394668A Expired - Fee Related CN1216453C (en) | 2000-11-24 | 2001-11-23 | Motor controller |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3700576B2 (en) |
| KR (1) | KR100800901B1 (en) |
| CN (1) | CN1216453C (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3711102B2 (en) * | 2002-10-30 | 2005-10-26 | 三洋電機株式会社 | Single-phase motor driving device, single-phase motor driving method, and integrated circuit |
| JP2004208450A (en) * | 2002-12-26 | 2004-07-22 | Sanden Corp | Motor controller |
| KR100695581B1 (en) * | 2003-04-30 | 2007-03-14 | 마츠시타 덴끼 산교 가부시키가이샤 | Motor driving apparatus, compressor, air conditioner, refrigerator, fan, electrical cleaner, electrical dryer, heat pump hot-water supplier, and hybrid automobile |
| JP3829838B2 (en) * | 2003-11-05 | 2006-10-04 | ソニー株式会社 | Sensorless brushless motor |
| JP2005198376A (en) | 2004-01-05 | 2005-07-21 | Matsushita Electric Ind Co Ltd | Method of driving brushless dc motor, and its device |
| JP4218572B2 (en) * | 2004-04-07 | 2009-02-04 | パナソニック株式会社 | Dishwasher motor drive |
| JP4116595B2 (en) * | 2004-06-30 | 2008-07-09 | ファナック株式会社 | Motor control device |
| JP4425091B2 (en) * | 2004-08-25 | 2010-03-03 | 三洋電機株式会社 | Motor position sensorless control circuit |
| JP4261523B2 (en) * | 2004-09-03 | 2009-04-30 | パナソニック株式会社 | Motor driving apparatus and driving method |
| KR101066700B1 (en) * | 2006-10-19 | 2011-09-21 | 미쓰비시덴키 가부시키가이샤 | Power converter |
| US7755317B2 (en) * | 2006-12-05 | 2010-07-13 | Byd Company Limited | Methods for electric vehicle motor control and rotor position detection fault-tolerant processing |
| JP5051226B2 (en) * | 2007-06-27 | 2012-10-17 | 株式会社明電舎 | Pseudo current type 120 degree conduction inverter |
| JP5167717B2 (en) * | 2007-08-08 | 2013-03-21 | 日本精工株式会社 | Motor drive control device and electric power steering device using motor drive control device |
| JP2010029044A (en) * | 2008-07-24 | 2010-02-04 | Panasonic Corp | Motor controller |
| JP5195444B2 (en) * | 2009-01-14 | 2013-05-08 | パナソニック株式会社 | Brushless DC motor driving apparatus, refrigerator and air conditioner using the same |
| DE102009030884A1 (en) * | 2009-06-23 | 2011-01-05 | GÄRTNER ELECTRONIC-DESIGN GmbH | Method and device for compensating load influences in permanent-magnet motors |
| JP5363352B2 (en) * | 2010-01-06 | 2013-12-11 | 株式会社日立産機システム | Drive control device for hoisting machine |
| KR101852430B1 (en) * | 2012-01-30 | 2018-04-26 | 엘지전자 주식회사 | Apparatus and method for controlling compressor |
| KR101401474B1 (en) * | 2012-12-20 | 2014-06-03 | 서울대학교산학협력단 | Circuit and method for controlling motor without any position or speed sensor |
| CN103887992A (en) * | 2014-04-10 | 2014-06-25 | 重庆瑜欣平瑞电子有限公司 | Frequency converter of generator |
| CN108270382B (en) * | 2016-12-30 | 2021-01-22 | 杭州三花研究院有限公司 | Control method and device |
| KR20210053687A (en) * | 2019-11-04 | 2021-05-12 | 엘지전자 주식회사 | Device for driving a plurality of motors and electric apparatus including the same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07118944B2 (en) * | 1986-03-17 | 1995-12-18 | 株式会社日立製作所 | Brushless DC motor |
| US5486743A (en) * | 1992-11-19 | 1996-01-23 | Kabushiki Kaisha Toshiba | Inverter and air conditioner controlled by the same |
| JP3935543B2 (en) * | 1996-02-01 | 2007-06-27 | 株式会社日本自動車部品総合研究所 | PM motor control device |
| JPH10150795A (en) * | 1996-11-15 | 1998-06-02 | Toshiba Corp | Inverter device |
| KR100308006B1 (en) * | 1998-04-27 | 2001-11-30 | 구자홍 | compensation method of a position detecting error for BLDC motor |
| JP2000083397A (en) * | 1998-07-10 | 2000-03-21 | Matsushita Electric Ind Co Ltd | Control device for motor and motor unit having the same |
| JP2000278984A (en) * | 1999-01-18 | 2000-10-06 | Nsk Ltd | Brushless dc motor drive-controlling device |
-
2000
- 2000-11-24 JP JP2000357281A patent/JP3700576B2/en not_active Expired - Fee Related
-
2001
- 2001-11-23 CN CN011394668A patent/CN1216453C/en not_active Expired - Fee Related
- 2001-11-23 KR KR1020010073167A patent/KR100800901B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR100800901B1 (en) | 2008-02-04 |
| JP3700576B2 (en) | 2005-09-28 |
| CN1356767A (en) | 2002-07-03 |
| KR20020040615A (en) | 2002-05-30 |
| JP2002165482A (en) | 2002-06-07 |
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