CN101652922B - Fan motor controller and fan motor control method - Google Patents
Fan motor controller and fan motor control method Download PDFInfo
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- CN101652922B CN101652922B CN2008800100445A CN200880010044A CN101652922B CN 101652922 B CN101652922 B CN 101652922B CN 2008800100445 A CN2008800100445 A CN 2008800100445A CN 200880010044 A CN200880010044 A CN 200880010044A CN 101652922 B CN101652922 B CN 101652922B
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- fan motor
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- overcurrent
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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
- 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
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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
- H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
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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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
Abstract
Generation of strange sound is suppressed while protecting a power element and the operable area of a fan motor is restrained from becoming narrower by controlling repetition of interruption and reset of a signal delivered to the fan motor. When overcurrent of a brushless DC motor is detected, a fan motor controller interrupts a signal delivered to the brushless DC motor. Subsequently, a modulation factor maximum limit value is set such that the modulation factor is limited to satisfy a condition that the modulation factor of a signal delivered to the brushless DC motor falls within a range of the modulation factor when an overcurrent is detected (S52, S53). When the modulation factor maximum limit value is less than a preset lower limit value (S54: No), that lower limit value is set as the modulation factor maximum limit value (S55).
Description
Technical field
The present invention relates to control the fan motor controller and the fan motor control method of the driving of fan motor.
Background technology
In fan motor controller in the past, when in fan motor, flowing through overcurrent,, and then begin output with the signal cut scheduled time of exporting to this fan motor.
But; In above-mentioned fan motor controller in the past; Receive at the fan that rotates by fan motor under the situation of resistance of wind; Even begin output once more after will exporting to signal cut scheduled time of this fan motor, when detecting overcurrent once more, the signal of exporting to fan motor is cut off.Therefore, owing to export to the cut-out and the recovery of the signal of fan motor repeatedly, there is the problem that produces abnormal sound.In addition, owing to export to the cut-out and the recovery of the signal of fan motor repeatedly, also there is the problem that fan motor is provided the power component abnormal heating of electric power.
And in the cut-out of the signal of exporting to fan motor as stated repeatedly with when recovering, owing to carry out this cut-out and recovery repeatedly, the rotary speed of fan descends.Therefore; The rotary speed of fan deviates from the rotary speed instruction of the rotary speed of this fan of indication mutually; When reverting to normal condition, produce overcurrent once more, the signal of exporting to fan motor is cut off once more, has the cut-out of the signal of exporting to fan motor repeatedly and the problem of recovery.
Therefore, proposed to control the technology (for example, with reference to patent documentation 1) of the rotating speed of fan motor according to the current value that flows through fan motor.In this patent documentation 1 disclosed fan motor controller; Be that predetermined value is when above by the detected current value that flows through fan motor of input current testing circuit; The instruction rotating speed of indication rotation speed of the fan is reduced, prevent that thus the signal of exporting to fan motor is cut off.Thus, export to the cut-out and the recovery of the signal of fan motor no longer repeatedly.
Patent documentation 1: TOHKEMY 2001-286179 communique
In above-mentioned patent documentation 1 disclosed fan motor controller, control the rotating speed of fan motor according to the current value that flows through fan motor, so need to measure the input current testing circuit of the current value that flows through fan motor.As a result, the problem that has the cost increase of fan motor controller.
And; In above-mentioned patent documentation 1 disclosed fan motor controller; Before the overcurrent halt circuit action that the output that makes to fan motor stops, reducing the rotating speed of fan motor, so but the problem that exists the operation range of fan motor to diminish.
Summary of the invention
The present invention proposes in order to address the above problem; Its purpose is; A kind of fan motor controller and fan motor control method are provided at low cost, and the cut-out of signal and carrying out repeatedly of recovery through suppressing to export to fan motor can suppress the generation of abnormal sound; And the protection power component, but and the operation range that suppresses fan motor diminish.
The fan motor controller of first invention has: inverter circuit; Control is used for the control unit of the signal of drive fan motor; The current value that flows through fan motor with detection reaches the excessive current detection unit of the situation more than the predetermined value.And; Under the situation of the overcurrent that detects fan motor by excessive current detection unit; Control unit cuts off the signal export to fan motor, be controlled to be the little index of modulation of the index of modulation when detecting overcurrent to the index of modulation of the signal of exporting to fan motor then after, begin signal output once more to fan motor; Wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of said inverter circuit when beginning to export once more after overcurrent detects.
In this fan motor controller; Flow through in overcurrent under the situation of fan motor; The signal of exporting to fan motor is by temporarily disconnected; Begin output once more with the little index of modulation of the index of modulation that is controlled as when detecting overcurrent then, produce overcurrent in the aft-fan motor once more so can be suppressed to begin once more to export.Thus, can be suppressed at the signal of exporting to fan motor after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to fan motor are repeatedly.As a result, can suppress owing to the cut-out of the signal of exporting to fan motor and recovery produce abnormal sound repeatedly, and can protect power component.
In addition; In this fan motor controller; The cut situation of signal that prevents to export to fan motor with the rotating speed that reduces fan motor according to the current value that flows through fan motor thus is different, before producing overcurrent, fan motor is turned round according to the instruction rotating speed.Therefore, but can not produce the problem that the operation range of fan motor diminishes.And, need not be provided for measuring the input current testing circuit of the current value that flows through fan motor, so practiced thrift the part of input current testing circuit, can constitute fan motor controller at low cost.
The fan motor controller of second invention has: inverter circuit; Control is used for the control unit of the signal of drive fan motor; The current value that flows through fan motor with detection reaches the excessive current detection unit of the situation more than the predetermined value.And; Under the situation of the overcurrent that detects fan motor by excessive current detection unit; Control unit cuts off the signal of exporting to fan motor; After being restricted to the index of modulation that satisfies this condition in the little scope of the index of modulation when detecting overcurrent to the index of modulation of the signal of exporting to fan motor then; Begin the signal output to fan motor once more, wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of said inverter circuit when beginning to export once more after overcurrent detects.
In this fan motor controller; When overcurrent flows through fan motor; The signal of exporting to fan motor is by temporarily disconnected; Begin output once more to be restricted to the index of modulation that satisfies this condition in the little scope of the index of modulation when detecting overcurrent then, produce overcurrent in the aft-fan motor once more so can be suppressed to begin once more to export.Thus, can be suppressed at the signal of exporting to fan motor after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to fan motor are repeatedly.As a result, can suppress owing to the cut-out of the signal of exporting to fan motor and recovery produce abnormal sound repeatedly, and can protect power component.
In addition; In this fan motor controller; The cut situation of signal that prevents to export to fan motor with the rotating speed that reduces fan motor according to the current value that flows through fan motor thus is different, before producing overcurrent, fan motor is turned round according to the instruction rotating speed.Therefore, but can not produce the problem that the operation range of fan motor diminishes.And, need not be provided for measuring the input current testing circuit of the current value that flows through fan motor, so practiced thrift the part of input current testing circuit, can constitute fan motor controller at low cost.
The fan motor controller of the 3rd invention is in the fan motor controller of second invention; Control unit is restricted to the index of modulation index of modulation that satisfies less than this condition of index of modulation KB limit; Wherein, The index of modulation of this index of modulation KB limit when detecting overcurrent, control unit increase the index of modulation KB limit about the signal of exporting to fan motor after the signal output that begins once more fan motor.
In this fan motor controller, can be to turn round usually from the recovering state of running of restriction fan motor.
The fan motor controller of the 4th invention is in the fan motor controller of the 3rd invention; Control unit is in the moment from beginning once more the signal of fan motor is exported; When under the state that does not detect overcurrent, passing through for the 1st scheduled time, make index of modulation KB limit increase about the signal of exporting to fan motor.
In this fan motor controller; In the moment from beginning once more the signal of fan motor is exported; When under the state that does not detect overcurrent, passing through for the 1st scheduled time, can relax with the fan motor is the confined situation of rotating speed of the fan that rotates of drive source.Thus, after utilizing signal after modulating with the index of modulation in the scope of the index of modulation when detecting overcurrent to make the running of fan motor stable, can make fan motor revert to common running according to the instruction rotating speed.
The fan motor controller of the 5th invention is in the fan motor controller of the arbitrary invention in first～the 4th invention; The index of modulation when the signal output of wanting to begin once more to fan motor is during less than predefined lowest modulation coefficient, and control unit begins the signal output to fan motor no longer once more.
In this fan motor controller; Even fan motor output signal also is being detected under the situation of overcurrent with the index of modulation less than the lowest modulation coefficient; Think that the reason owing to unit failure is detected overcurrent once more; So the index of modulation when wanting to begin once more during less than minimum value, begins output no longer once more.As a result, although can prevent that from there is fault in parts but still the situation that begins once more for several times to export.
The fan motor controller of the 6th invention is the fan motor controller of the arbitrary invention in first～the 4th invention; The index of modulation when the signal output of wanting to begin once more to fan motor is during less than predefined lowest modulation coefficient; After control unit control becomes the index of modulation that makes the signal of exporting to fan motor and is not less than this lowest modulation coefficient, begin signal output once more to fan motor.
In this fan motor controller; Even the index of modulation with the lowest modulation coefficient also is detected under the situation of overcurrent fan motor output signal; It is many that the noise that does not have owing to the running to fan motor to hinder overlapping recurred the situation of overcurrent, so begin the signal output to fan motor once more to be controlled so as to the index of modulation that is not less than the lowest modulation coefficient.Thus, can prevent to cause the running of fan motor to stop owing to the overlapping of noise that the running to fan motor does not have to hinder.
The fan motor controller of the 7th invention is in the fan motor controller of the arbitrary invention in first～the 6th invention; When passing through for the 2nd scheduled time in the moment of exporting to the signal of fan motor from cut-out, control unit begins the signal output to fan motor once more.
In this fan motor controller, when passing through for the 2nd scheduled time, begin signal output rapidly once more to fan motor in the moment of exporting to fan motor from cut-out.As a result, can begin once more rapidly the output of the signal of fan motor, even so that under to the cut state of the output of fan motor, the fan that rotates because of inertia can not stop yet.
The fan motor controller of the 8th invention is in the fan motor controller of the arbitrary invention in first～the 6th invention; Export to the signal of fan motor in cut-out after; When excessive current detection unit did not detect overcurrent, the feasible signal output to fan motor of control unit began once more.
In this fan motor controller, when not detecting overcurrent, begin signal output once more to fan motor, begin to export the back overcurrent that produces once more once more so can be suppressed at once.
The fan motor control method of the 9th invention is the fan motor control method that the signal of fan motor is exported in control; Flow through in overcurrent under the situation of fan motor; Export to the signal of fan motor in cut-out after; Become the little index of modulation of the index of modulation when detecting overcurrent to the index of modulation of the signal of exporting to fan motor control; And then begin signal output to fan motor, wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of inverter circuit when beginning to export once more after overcurrent detects.
In this fan motor control method; Flow through in overcurrent under the situation of fan motor; The signal of exporting to fan motor is by temporarily disconnected; Begin output once more with the little index of modulation of the index of modulation that is controlled as when detecting overcurrent then, produce overcurrent when beginning to export once more in the fan motor once more so can be suppressed at.Thus, can be suppressed at the signal of exporting to fan motor after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to fan motor are repeatedly.As a result, can suppress owing to the cut-out of the signal of exporting to fan motor and recovery produce abnormal sound repeatedly, and can protect power component.
In addition; In this fan motor control method; The cut situation of signal that prevents to export to fan motor with the rotating speed that reduces fan motor according to the current value that flows through fan motor thus is different; Before producing overcurrent, the running of fan motor is turned round according to the instruction rotating speed.Therefore, but can not produce the problem that the operation range of fan motor diminishes.And, need not be provided for measuring the input current testing circuit of the current value that flows through fan motor, so correspondingly the fan motor control method can be provided at low cost.
The fan motor control method of the tenth invention is the fan motor control method that the signal of fan motor is exported in control; Flow through in overcurrent under the situation of fan motor; The signal of fan motor is exported in cut-out; After being restricted to the index of modulation of this condition in the scope below the index of modulation that satisfies when detecting overcurrent to the index of modulation of the signal of exporting to fan motor then; Begin the signal output to fan motor once more, wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of inverter circuit when beginning to export once more after overcurrent detects.
In this fan motor control method; When overcurrent flows through fan motor; The signal of exporting to fan motor is by temporarily disconnected; Begin output once more to be restricted to the index of modulation that satisfies this condition in the little scope of the index of modulation when detecting overcurrent then, fan motor produces overcurrent once more when beginning to export once more so can be suppressed at.Thus, can be suppressed at the signal of exporting to fan motor after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to fan motor are repeatedly.As a result, can suppress owing to the cut-out of the signal of exporting to fan motor and recovery produce abnormal sound repeatedly, and can protect power component.
In addition; In this fan motor control method; The cut situation of signal that prevents to export to fan motor with the rotating speed that reduces fan motor according to the current value that flows through fan motor thus is different, before producing overcurrent, fan motor is turned round according to the instruction rotating speed.Therefore, but can not produce the problem that the operation range of fan motor diminishes.And, need not be provided for measuring the input current testing circuit of the current value that flows through fan motor, so correspondingly the fan motor control method can be provided at low cost.
Explanation as above is said, can obtain following effect according to the present invention.
In first and second inventions, can be suppressed at the signal of exporting to fan motor after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to fan motor are repeatedly.As a result, can suppress to produce abnormal sound and protection power component repeatedly owing to the cut-out of the signal of exporting to fan motor and recovery.And, in first and second inventions, before producing overcurrent, fan motor is turned round according to the instruction rotating speed.Therefore, but can not produce the problem that the operation range of fan motor diminishes.In addition, in first and second inventions, need not be designed for the input current testing circuit of measuring the current value that flows through fan motor, so the part of corresponding input current testing circuit can constitute fan motor controller at low cost.
And, in third and fourth invention, can be from the recovering state of the running of restriction fan motor for running well.
And, in the 5th invention, although can prevent that parts from having damaged but still the situation that begins once more for several times to export.
And, in the 6th invention, can prevent to cause the running of fan motor to stop owing to the overlapping of noise that the running to fan motor does not have to hinder.
And, in the 7th invention, can begin once more rapidly the signal of fan motor is exported, even so that under to the cut state of the output of fan motor, the fan that rotates because of inertia can not stop yet.
And, in the 8th invention, can be suppressed at and begin to export the back once more and produce overcurrent once more at once.
And, in the 9th and the tenth invention, can be suppressed at the signal of exporting to fan motor after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to fan motor are repeatedly.As a result, can suppress to produce abnormal sound and protection power component repeatedly owing to the cut-out of the signal of exporting to fan motor and recovery.And, in the 9th and the tenth invention, before producing overcurrent, fan motor is turned round according to the instruction rotating speed.Therefore, but can not produce the problem that the operation range of fan motor diminishes.In addition, in the nine and the tenth invention, need not be designed for the input current testing circuit of measuring the current value that flows through fan motor, so correspondingly the fan motor control method can be provided at low cost.
Description of drawings
Fig. 1 is the block diagram of the fan motor controller of the 1st execution mode of the present invention.
Fig. 2 is the flow chart that is used to explain the fan motor control method of fan motor controller shown in Figure 1.
Fig. 3 is the flow chart that is used to explain the fan motor control method of fan motor controller shown in Figure 1.
Fig. 4 is the flow chart that is used to explain the fan motor control method of fan motor controller shown in Figure 1.
Fig. 5 is the sketch map of relation of direct current portion current waveform, over-current detection signal, index of modulation limit processing and carrier wave Interrupt Process of output voltage waveforms, the inverter circuit of expression carrier wave timer, microcomputer.
Fig. 6 is illustrated in the index of modulation of setting when overcurrent detects to export peaked curve chart.
Fig. 7 is illustrated in the index of modulation of setting when overcurrent detects to export peaked curve chart.
Fig. 8 is the block diagram of the fan motor controller of the 2nd execution mode of the present invention.
Fig. 9 is the flow chart that is used to explain the fan motor control method of fan motor controller shown in Figure 8.
Figure 10 is the flow chart that is used to explain the fan motor control method of fan motor controller shown in Figure 8.
Figure 11 is illustrated in the curve chart that is lowered the index of modulation of scheduled volume when overcurrent detects.
Figure 12 is illustrated in the curve chart that is lowered the index of modulation of scheduled volume when overcurrent detects.
Figure 13 is the flow chart of variation of fan motor control method of the fan motor controller of the 1st execution mode shown in Figure 2.
Figure 14 is the flow chart of variation of fan motor control method of the fan motor controller of the 2nd execution mode shown in Figure 9.
Figure 15 is the flow chart of variation of fan motor control method of the fan motor controller of the 1st execution mode shown in Figure 3.
Figure 16 is the flow chart of variation of fan motor control method of the fan motor controller of the 2nd execution mode shown in Figure 10.
Label declaration
1,100 fan motor controllers; 2 fans; 3 brushless DC motors; 10 converter circuits; 20 inverter circuits; 30,130 microcomputers; 31 location/velocity test sections; 32,132 decline control parts; 33,133 speed controlling portions; 34 sine wave modulation portions; 35 drive signal generation circuits; 40 overcurrent sensing circuits.
Embodiment
(the 1st execution mode)
Fig. 1 is the block diagram of the fan motor controller of the 1st execution mode of the present invention.The structure of the fan motor controller 1 of the 1st execution mode of the present invention at first, is described with reference to Fig. 1.
As shown in Figure 1,1 pair of the fan motor controller of this execution mode is controlled the driving of the brushless DC motor 3 of fan 2 rotations, and this fan 2 is arranged in the indoor set or off-premises station of air conditioner.In this brushless DC motor 3, when 3 phase output voltages of the inverter circuit of narrating from behind 20 outputs were applied in to each stator winding 3a, rotor 3b rotation made fan 2 rotations thus.And, on brushless DC motor 3, be provided with 3 Hall element 3c, export to the location/velocity test section 31 of microcomputer 30 by the detected position signalling Hu of each Hall element 3c, Hv, Hw.
Location/velocity test section 31 by the detected position signalling Hu of the Hall element 3c of brushless DC motor 3, Hv and Hw as input, according to the current rotating speed of the computation of Period brushless DC motor 3 of this position signalling Hu, Hv and Hw.
Decline control part 32 as input, is exported index of modulation KB limits to the over-current detection signal that is detected by overcurrent sensing circuit 40 to speed controlling portion 33.This index of modulation KB limit is the little value of the index of modulation when detecting than overcurrent, and the number of times that produces continuously according to overcurrent upgrades this index of modulation KB limit, and exports to speed controlling portion 33.Specifically, decline control part 32 is exported the increased frequency that produces continuously along with overcurrent and the index of modulation KB limit that diminishes to speed controlling portion 33.In addition, in this execution mode, the index of modulation KB limit after being updated is exported to speed controlling portion 33 to this lower limit as index of modulation KB limit when predefined lower limit is following.That is, in brushless DC motor 3, produce overcurrent continuously and make when index of modulation KB limit diminishes, can be less than predefined lower limit yet.
Sine wave modulation portion 34 bases are by the index of modulation instruction of speed controlling portion 33 outputs and position signalling and the current rotating speed of being exported by location/velocity test section 31; Generation is used to specify the duty ratio instruction of each duty ratio of the gate signal Gu that offers inverter circuit 20, Gx, Gv, Gy, Gw, Gz, and exports to drive signal generation circuit 35.Wherein, the duty ratio instruction is made up of the instruction of U phase duty ratio, the instruction of V phase duty ratio, the instruction of W phase duty ratio.
Drive signal generation circuit 35 is according to the duty ratio instruction by 34 outputs of sine wave modulation portion, to gate drive circuit 22 out gate signal Gu, Gx, Gv, Gy, Gw, the Gz of inverter circuit 20.The timing out gate signal that drive signal generation circuit 35 provides at the carrier wave timer (with reference to Fig. 5) by microcomputer 30.And drive signal generation circuit 35 stops to export to the output of gate signal of the gate drive circuit 22 of inverter circuit 20 when being transfused to the over-current detection signal of overcurrent sensing circuit 40.
Fig. 2～Fig. 4 is the flow chart that is used to explain the fan motor control method of fan motor controller shown in Figure 1.Fig. 5 is the sketch map of relation of direct current portion current waveform, over-current detection signal, index of modulation limit processing and carrier wave Interrupt Process of output voltage waveforms, the inverter circuit of expression carrier wave timer, microcomputer.Fig. 6 and Fig. 7 are illustrated in the index of modulation of setting when overcurrent detects to export peaked curve chart.Below, the fan motor control method of the fan motor controller 1 of the 1st execution mode is described with reference to Fig. 2～Fig. 7.
In this fan motor controller 1, as shown in Figure 5, carry out the carrier wave Interrupt Process in the timing (intervals of 40 μ s～200 μ s) that the carrier wave timer by microcomputer 30 provides.In this carrier wave Interrupt Process, at first as shown in Figure 2, whether the gate signal that judgement is exported to inverter circuit 20 by drive signal generation circuit 35 is cut off (S1).Then, at (S1: not), judge in the brushless DC motor 3 whether produced overcurrent (S2) when inverter circuit 20 has been exported gate signal.Specifically, judge in the brushless DC motor 3 whether flow through overcurrent by the overcurrent sensing circuit that is connected with the direct current portion of brushless DC motor 3 40.
And, as shown in Figure 5, when in brushless DC motor 3, having produced overcurrent (S2: be), be used for instrumentation from begin once more to the moment of brushless DC motor 3 output signals does not continue the generation overcurrent during counter be reset (S3).Then, the gate signal of exporting to inverter circuit 20 is cut off (S4).Then, carry out index of modulation limit processing (S5).
This index of modulation limit processing (S5) is the subprogram of the restriction index of modulation, the higher limit of the voltage peak of the output voltage of setting inverter circuit 20 when this index of modulation is used for after overcurrent detects, beginning to export once more.In index of modulation limit processing, as shown in Figure 3, at first judge whether set index of modulation KB limit (S51).And (S51: deny) is as shown in Figure 6 when not setting index of modulation KB limit, is set at the index of modulation KB limit index of modulation (S52) of this condition in the scope that satisfies the index of modulation when detecting less than overcurrent.Specifically, shown in Fig. 6 (a), under the situation that the variation of the index of modulation after overcurrent takes place increased along with the time, be restricted to this index of modulation KB limit and output.And; Shown in Fig. 6 (b); The index of modulation after overcurrent takes place is boundary and when changing up and down with this index of modulation KB limit; The above part of this index of modulation KB limit is restricted to this index of modulation KB limit, is directly exported less than the part of this index of modulation KB limit.And, shown in Fig. 6 (c), when the index of modulation after overcurrent takes place is passed in the scope less than this index of modulation KB limit, by directly output.Then, finish index of modulation limit processing.
On the other hand, (S51: be) is as shown in Figure 7 when having set index of modulation KB limit, this index of modulation KB limit is reduced scheduled volume upgrade (S53).The processing of this step S53 is carried out when being consecutively detected overcurrent.Then, judge whether the index of modulation KB limit after upgrading is predefined lower limit above (S54).And; Index of modulation KB limit after renewal is that predefined lower limit is when above (S54: be); Finish index of modulation limit processing; Index of modulation KB limit after renewal is (S54: not), be set at this lower limit (S55) to index of modulation KB limit, finish index of modulation limit processing during less than predefined lower limit.Thus, recurring under the situation of overcurrent,, also can control to become and make the index of modulation KB limit can be less than lower limit even when index of modulation KB limit descends gradually.
After index of modulation limit processing (S5) finishes, as shown in Figure 2, finish the carrier wave Interrupt Process, carry out next carrier wave Interrupt Process.
And, through detecting overcurrent (S2: be) in the carrier wave Interrupt Process in front, when the output to the gate signal of inverter circuit 20 is cut off (S4) (S1: be), begin output (S6) once more to the gate signal of inverter circuit 20.Therefore; Having passed through when cutting off the time till the moment (moment of the S4 the carrier wave Interrupt Process of front) of inverter circuit 20 out gate signals is played the moment of the S6 in the current carrier wave Interrupt Process, begin signal output once more to brushless DC motor 3.Index of modulation when this begins to export once more is restricted to the index of modulation that satisfies following condition, promptly in the scope less than the index of modulation KB limit of in above-mentioned index of modulation limit processing (S5), setting.Then, the carrier wave Interrupt Process finishes, and carries out next carrier wave Interrupt Process.
And, in the carrier wave Interrupt Process, when in brushless DC motor 3, not producing overcurrent (S2: not), be used for instrumentation from begin once more to the moment of the signal output of brushless DC motor 3 does not continue the generation overcurrent during counter be updated (S7).Then, whether the value of judging this counter is predefined predetermined value above (S8), at the value of this counter (S8: not), finish the carrier wave Interrupt Process, carry out next carrier wave Interrupt Process during less than predetermined value.On the other hand, be predetermined value when above (S8: be) in the value of this counter, carry out the index of modulation and relax and handle (S9).That is, in this execution mode, from beginning to continue the scheduled time when not detecting overcurrent once more, carry out the index of modulation and relax and handle (S9) to the moment of the signal of brushless DC motor 3 output.
It is the subprogram that is used for relaxing the index of modulation KB limit of setting in index of modulation limit processing shown in Figure 3 that this index of modulation relaxes processing (S9).Relax in the processing at the index of modulation, as shown in Figure 4, at first judge whether set index of modulation KB limit (S91).And, (S91: not), directly finish the index of modulation and relax processing when not setting index of modulation KB limit.On the other hand, when having set index of modulation KB limit (S91: be), this index of modulation KB limit is improved scheduled volume upgrade (S92).Like this, finish the index of modulation and relax processing.
After the index of modulation relaxes processing (S9) end, as shown in Figure 2, finish the carrier wave Interrupt Process, carry out next carrier wave Interrupt Process.Like this, control the fan motor controller 1 of the 1st execution mode.
[characteristic of this fan motor controller 1]
The fan motor controller 1 of this execution mode has the characteristic of the following stated.
In the fan motor controller 1 of this execution mode; When overcurrent flows through brushless DC motor 3; The signal of exporting to brushless DC motor 3 is cut off for the time being; Then with the index of modulation that is restricted to this condition in the scope that satisfies the index of modulation when detecting less than overcurrent begin once more output, so can be suppressed at begin once more to export the back brushless DC motor 3 produce overcurrent once more.Thus, can be suppressed at the signal of exporting to brushless DC motor 3 after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to brushless DC motor 3 are repeatedly.As a result, can suppress owing to the cut-out of the signal of exporting to brushless DC motor 3 and recovery produce abnormal sound repeatedly, and can protect power component.
And; In the fan motor controller 1 of this execution mode; With the rotating speed that as patent documentation 1, reduces fan motor according to the current value that flows through fan motor; The cut situation of signal that prevents to export to fan motor thus is different, can be before producing overcurrent, and brushless DC motor 3 is turned round according to speed command.Therefore, but can not produce the problem that the operation range of brushless DC motor 3 diminishes.And, need not be designed for the input current testing circuit of measuring the current value that flows through brushless DC motor 3, so correspondingly practiced thrift the cost of input current testing circuit part, can constitute fan motor controller 1 at low cost.
And, in the fan motor controller 1 of this execution mode, from beginning to continue the scheduled time when not detecting overcurrent once more, carry out the index of modulation and relax and handle (S9) to the moment of brushless DC motor 3 output signals.Thus, the signal after the index of modulation modulation in the scope of utilizing the index of modulation when detecting less than overcurrent can make fan motor according to instructing rotating speed to revert to common running after making the running of fan motor stable.
And; In the fan motor controller 1 of this execution mode; Even also be detected under the situation of overcurrent to brushless DC motor 3 output signals with the index of modulation less than lower limit; The noise that the running to brushless DC motor 3 of resulting from does not have to hinder overlapping and that the situation of overcurrent takes place is many, thus this lower limit as index of modulation KB limit (S55), begin signal output (S6) once more to brushless DC motor 3.Thus, can prevent to cause the running of fan motor to stop owing to the overlapping of noise that the running to brushless DC motor 3 does not have to hinder.
And; In the fan motor controller 1 of this execution mode; When the time of having passed through till playing the moment of the S6 in the current carrier wave Interrupt Process, promptly begin signal output once more to brushless DC motor 3 to the cut moment of output (moment of the S4 the carrier wave Interrupt Process of front) of the gate signal of inverter circuit 20.As a result, can begin signal output rapidly once more, even so that under the cut state of the output of brushless DC motor 3, the fan that rotates because of inertia can not stop yet to brushless DC motor 3.
(the 2nd execution mode)
Fig. 8 is the block diagram of the fan motor controller of the 2nd execution mode of the present invention.The fan motor controller 1 of the 1st execution mode is set index of modulation KB limit when having produced overcurrent; The index of modulation when beginning to export once more is restricted to the index of modulation that satisfies this condition in less than the scope of this index of modulation KB limit; Different with the 1st execution mode; In the 2nd execution mode, the fan motor controller 100 that the index of modulation is reduced scheduled volume and be controlled to be the little index of modulation of the index of modulation when detecting than overcurrent is described when having produced overcurrent.In addition, except that the decline control part with the speed controlling portion, other are identical with above-mentioned the 1st execution mode, so mark same numeral and omit its explanation.
As shown in Figure 8; The decline control part 132 of the microcomputer 130 that is provided with in the fan motor controller 100 of the 2nd execution mode as input, is exported index of modulation control signals to the over-current detection signal that is detected by overcurrent sensing circuit 40 to speed controlling portion 133.
The current rotating speed that speed controlling portion 133 bases are exported by location/velocity test section 31, the speed command that provides from the outside and the index of modulation control signal of exporting by decline control part 132; To sine wave modulation portion 34 output indexes of modulation instruction, this index of modulation instruction is used to set the higher limit of voltage peak of the output voltage of inverter circuit 20.Specifically, speed controlling portion 133 calculates by the current rotating speed of location/velocity test section 31 outputs and the deviation of speed command, to the sine wave modulation portion 34 outputs index of modulation instruction corresponding with this deviation.At this moment; When having imported index of modulation control signal by decline control part 132; Speed controlling portion 133 is according to this index of modulation control signal; Index of modulation reduction scheduled volume that will be relevant with the index of modulation instruction of exporting to sine wave modulation portion 34 is made as the little index of modulation of the index of modulation when detecting than overcurrent to this index of modulation.In addition, in this execution mode, reach predefined lower limit when following at the index of modulation that has been lowered scheduled volume, this lower limit as the index of modulation instruction export to sine wave modulation portion 34.
Fig. 9 and Figure 10 are the flow charts that is used to explain the fan motor control method of fan motor controller shown in Figure 8.Figure 11 and Figure 12 are illustrated in the curve chart that is lowered the index of modulation of scheduled volume when overcurrent detects.Below, with reference to Fig. 9～Figure 12 the fan motor control method is described.
In this fan motor controller 100, carry out the carrier wave Interrupt Process in the timing (intervals of 40 μ s～200 μ s) that the carrier wave timer by microcomputer 30 provides.In this carrier wave Interrupt Process, at first as shown in Figure 9, whether the gate signal that judgement is exported to inverter circuit 20 by drive signal generation circuit 35 is cut off (S101).And, at (S101: not), judge in the brushless DC motor 3 whether produced overcurrent (S102) when inverter circuit 20 has been exported gate signal.Specifically, judge whether flow through overcurrent in the brushless DC motor 3 by the overcurrent sensing circuit 40 that is connected with the direct current portion of brushless DC motor 3.
And when in brushless DC motor 3, having produced overcurrent (S102: be), the gate signal of exporting to inverter circuit 20 is cut off (S103).Then, carry out index of modulation control and treatment (S104).
This index of modulation control and treatment (S104) is the subprogram that makes index of modulation reduction scheduled volume, the higher limit of the voltage peak of the output voltage of setting inverter circuit 20 when this index of modulation is used for after overcurrent detects, beginning to export once more.In index of modulation control and treatment shown in Figure 10, shown in figure 11 according to the index of modulation that calculates by the current rotating speed of location/velocity test section 31 output and speed command, be lowered fixed amount so that its index of modulation (S141) during less than the generation overcurrent.Specifically; The situation that the variation of the index of modulation after the overcurrent shown in Figure 11 (a) takes place increased along with the time, the index of modulation after the overcurrent as Figure 11 (b) shown in takes place are boundary's situation about changing up and down and under arbitrary situation of the situation that the index of modulation after the generation of the overcurrent as Figure 11 (c) shown in changes in the scope less than this index of modulation KB limit with this index of modulation KB limit, have taken place just that the index of modulation after the overcurrent all is lowered fixed amount so that its index of modulation during less than the generation overcurrent.
And, judge whether the index of modulation after reducing is predefined lower limit above (S142).And; The index of modulation after reduction is that predefined lower limit is when above (S142: be); Finish index of modulation control and treatment, (the S142: not), shown in figure 12 during of the index of modulation after reduction less than predefined lower limit; Be set at this lower limit (S143) to the index of modulation, finish index of modulation control and treatment.
After index of modulation control and treatment (S104) finishes, finish the carrier wave Interrupt Process, carry out next carrier wave Interrupt Process.
And, as shown in Figure 9, through detecting overcurrent in the carrier wave Interrupt Process in front, when the output to the gate signal of inverter circuit 20 is cut off (S101: be), begin once more to inverter circuit 20 out gate signals (S105).Therefore; When having passed through, begin signal output once more to brushless DC motor 3 from the time till the inverter circuit cut moment of 20 out gate signals, (moment of the S103 the carrier wave Interrupt Process of front) played the moment of the S105 in the current carrier wave Interrupt Process.Index of modulation when this begins to export once more is the index of modulation of in above-mentioned index of modulation control and treatment, setting.Then, the carrier wave Interrupt Process finishes, and carries out next carrier wave Interrupt Process.Control the fan motor controller 100 of the 2nd execution mode like this.
[characteristic of this fan motor controller 100]
The fan motor controller 100 of this execution mode has the characteristic of the following stated.
In the fan motor controller 100 of this execution mode; When overcurrent flows through brushless DC motor 3; The signal of exporting to brushless DC motor 3 is cut off for the time being; Begin output once more with the little index of modulation of the index of modulation that is controlled as when detecting then, begin to export back brushless DC motor 3 once more and produce overcurrent once more so can be suppressed at than overcurrent.Thus, can be suppressed at the signal of exporting to brushless DC motor 3 after beginning once more to export and be cut off once more, so cut-out and the recovery that can suppress to produce the signal of exporting to brushless DC motor 3 are repeatedly.As a result, can suppress owing to the cut-out of the signal of exporting to brushless DC motor 3 and recovery produce abnormal sound repeatedly, and can protect power component.
And; In the fan motor controller 100 of this execution mode; With the rotating speed that as patent documentation 1, reduces fan motor according to the current value that flows through fan motor; The cut situation of signal that prevents to export to fan motor thus is different, can be before producing overcurrent, and brushless DC motor 3 is turned round according to speed command.Therefore, but can not produce the problem that the operation range of brushless DC motor 3 diminishes.And, need not be designed for the input current testing circuit of measuring the current value that flows through brushless DC motor 3, so correspondingly practiced thrift the cost of input current testing circuit, can constitute fan motor controller 100 at low cost.
And; In the fan motor controller 100 of this execution mode; Even also be detected under the situation of overcurrent to brushless DC motor 3 output signals with the index of modulation less than lower limit; The running to brushless DC motor 3 of resulting from does not have the The noise that hinders and that the situation of overcurrent takes place is many, thus this lower limit as the index of modulation (S143), begin signal output (S105) once more to brushless DC motor 3.Thus, can prevent to cause the running of fan motor to stop owing to the noise that the running to brushless DC motor 3 does not have to hinder.
And; In the fan motor controller 100 of this execution mode; When the time of having passed through till playing the moment of the S105 in the current carrier wave Interrupt Process, promptly begin signal output once more to brushless DC motor 3 to the cut moment of output (moment of the S103 the carrier wave Interrupt Process of front) of the gate signal of inverter circuit 20.As a result, can begin signal output rapidly once more, even so that under the cut state of the output of brushless DC motor 3, the fan that rotates because of inertia can not stop yet to brushless DC motor 3.
More than, according to description of drawings execution mode of the present invention, but should think that concrete structure is not limited to these execution modes.Scope of the present invention is not to utilize the explanation of above-mentioned execution mode but utilize claim to illustrate, and also comprises and the meaning that claim is impartial and the whole changes in the scope.
For example; In above-mentioned the 1st execution mode, following example has been described; When having passed through the scheduled time (time till playing the moment of the S6 in the current carrier wave Interrupt Process) in the moment of exporting to the signal of brushless DC motor 3 from cut-out to cut moment of output (moment of the S4 the carrier wave Interrupt Process of front) of the gate signal of inverter circuit; Begin once more to the output of the signal of brushless DC motor 3, but the invention is not restricted to this, the variation of the 1st execution mode shown in also can image pattern 13 is such; When overcurrent sensing circuit no longer detects overcurrent, begin signal output once more to brushless DC motor.
Specifically, shown in figure 13 when output in the carrier wave Interrupt Process in front is cut off, at first judge whether produced overcurrent (S201) in the brushless DC motor.And, when overcurrent sensing circuit detects less than overcurrent (S201: not), because output is cut off (S202: be), so begin signal output (S203) once more to brushless DC motor.
And, identical with the variation of above-mentioned the 1st execution mode in the variation of the 2nd execution mode shown in Figure 14, when output in the carrier wave Interrupt Process in front is cut off, at first judge whether produced overcurrent (S301) in the brushless DC motor.Then, and when overcurrent sensing circuit detects less than overcurrent (S301: not), because output is cut off (S302: be), so begin signal output (S303) once more to brushless DC motor.
And; Following example has been described in the 1st execution mode; The index of modulation when the signal output of wanting to begin once more to brushless DC motor (S54: not), be set at lower limit (S55) to index of modulation KB limit, begin signal output once more during less than predefined lower limit to brushless DC motor; But the invention is not restricted to this; The variation of the 1st execution mode shown in also can image pattern 15 is such, and the index of modulation when the signal output of wanting to begin once more to brushless DC motor does not begin the signal output to brushless DC motor during less than predefined lower limit once more.
Specifically, shown in figure 15, index of modulation KB limit is reduced scheduled volume upgrades (S53), this index of modulation KB limit during less than predefined lower limit (S54: not), notice unusual (S455), and finish running.
And, in the variation of the 2nd execution mode shown in Figure 16, identical with the variation of above-mentioned the 1st execution mode; Through the index of modulation being reduced fixed amount (S141); This index of modulation during less than predefined lower limit (S142: not), notice unusual (S543), and finish running.
And; In above-mentioned the 1st execution mode; The index of modulation when the signal output of wanting to begin once more to brushless DC motor is during less than predefined lower limit (S54); Be set at lower limit (S55) to index of modulation KB limit, but the invention is not restricted to be set at the situation of lower limit, also may be controlled to making the index of modulation KB limit can be less than lower limit.And; Also identical in the 2nd execution mode; The index of modulation when the signal output of wanting to begin once more to brushless DC motor is during less than predefined lower limit (S142); Be set at lower limit (S143) to this index of modulation, but the invention is not restricted to be set at the situation of lower limit, also may be controlled to making this index of modulation can be less than lower limit.
Utilizability on the industry
If utilize the present invention, the cut-out of the signal through suppressing to export to fan motor and recovery can suppress the generation of abnormal sound, and can protect power component repeatedly, but and the operation range that can suppress fan motor diminish.
Claims (10)
1. a fan motor controller (100) is characterized in that, this fan motor controller (100) has:
Inverter circuit (20);
Control is used for the control unit (130) of the signal of drive fan motor (3); With
The current value that said fan motor is flow through in detection reaches the excessive current detection unit (40) of the above situation of predetermined value,
Under the situation of the overcurrent that detects said fan motor by said excessive current detection unit; Said control unit cuts off the signal of exporting to said fan motor; After being controlled to be the little index of modulation of the index of modulation when detecting overcurrent to the index of modulation of the signal of exporting to said fan motor then; Begin signal output once more to said fan motor; Wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of said inverter circuit (20) when beginning to export once more after overcurrent detects.
2. a fan motor controller (1) is characterized in that, this fan motor controller (1) has:
Inverter circuit (20);
Control is used for the control unit (30) of the signal of drive fan motor (3); With
The current value that said fan motor is flow through in detection reaches the excessive current detection unit (40) of the above situation of predetermined value,
Under the situation of the overcurrent that detects said fan motor by said excessive current detection unit; Said control unit (30) cuts off the signal of exporting to said fan motor; After being restricted to the index of modulation that satisfies this condition in the little scope of the index of modulation when detecting overcurrent to the index of modulation of the signal of exporting to said fan motor then; Begin signal output once more to said fan motor; Wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of said inverter circuit (20) when beginning to export once more after overcurrent detects.
3. fan motor controller according to claim 2 (1); It is characterized in that; Said control unit (30) is restricted to the said index of modulation index of modulation that satisfies less than this condition of index of modulation KB limit; Wherein, the index of modulation of this index of modulation KB limit when detecting overcurrent
Said control unit (30) makes the index of modulation KB limit increase about the signal of exporting to said fan motor after the signal output that begins once more said fan motor.
4. fan motor controller according to claim 3 (1); It is characterized in that; Said control unit (30) is in the moment from beginning once more the signal of said fan motor is exported; When under the state that does not detect overcurrent, passing through for the 1st scheduled time, make index of modulation KB limit increase about the signal of exporting to said fan motor.
5. according to each described fan motor controller (1,100) in the claim 1～4; It is characterized in that; The index of modulation when the signal output of wanting to begin once more to said fan motor is during less than predefined lowest modulation coefficient, and said control unit (30,130) begins the signal output to said fan motor no longer once more.
6. according to each described fan motor controller (1,100) in the claim 1～4; It is characterized in that; The index of modulation when the signal output of wanting to begin once more to said fan motor is during less than predefined lowest modulation coefficient; After said control unit (30,130) control becomes the index of modulation that makes the signal of exporting to said fan motor and is not less than this lowest modulation coefficient, begin signal output once more to said fan motor.
7. according to each described fan motor controller (1,100) in the claim 1～4; It is characterized in that; When passing through for the 2nd scheduled time in the moment of exporting to the signal of said fan motor from cut-out, said control unit (30,130) begins the signal output to said fan motor once more.
8. according to each described fan motor controller (1,100) in the claim 1～4; It is characterized in that; Export to the signal of said fan motor in cut-out after; When said excessive current detection unit did not detect overcurrent, said control unit (30,130) began the signal output to said fan motor once more.
9. the fan motor control method of the signal of fan motor is exported in a control; It is characterized in that; Flow through in overcurrent under the situation of said fan motor; Export to the signal of said fan motor in cut-out after, become the little index of modulation of the index of modulation when detecting overcurrent to the index of modulation of the signal of exporting to said fan motor control, and then begin signal output said fan motor; Wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of inverter circuit when beginning to export once more after overcurrent detects.
10. the fan motor control method of the signal of fan motor is exported in a control; It is characterized in that; Flow through in overcurrent under the situation of said fan motor; The signal of said fan motor is exported in cut-out, be restricted to the index of modulation of this condition in the scope below the index of modulation that satisfies when detecting overcurrent to the index of modulation of the signal of exporting to said fan motor then after, begin once more the output of the signal of said fan motor; Wherein, this index of modulation is used to be set in the higher limit of the peak value of the output voltage of inverter circuit when beginning to export once more after overcurrent detects.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007102472A JP4356761B2 (en) | 2007-04-10 | 2007-04-10 | Fan motor control device and fan motor control method |
| JP102472/2007 | 2007-04-10 | ||
| PCT/JP2008/054278 WO2008126545A1 (en) | 2007-04-10 | 2008-03-10 | Fan motor controller and fan motor control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101652922A CN101652922A (en) | 2010-02-17 |
| CN101652922B true CN101652922B (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008800100445A Expired - Fee Related CN101652922B (en) | 2007-04-10 | 2008-03-10 | Fan motor controller and fan motor control method |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4356761B2 (en) |
| KR (1) | KR101085877B1 (en) |
| CN (1) | CN101652922B (en) |
| TW (1) | TW200843323A (en) |
| WO (1) | WO2008126545A1 (en) |
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|---|---|---|---|---|
| WO2011155160A1 (en) * | 2010-06-08 | 2011-12-15 | パナソニック株式会社 | Motor drive device, brushless motor, and motor drive method |
| TWI474605B (en) * | 2011-11-24 | 2015-02-21 | Ind Tech Res Inst | Motor controlling device and motor controlling mehtod |
| JP5952157B2 (en) * | 2012-10-05 | 2016-07-13 | 矢崎総業株式会社 | Fan motor control device |
| CN103926455A (en) * | 2013-01-10 | 2014-07-16 | 中兴通讯股份有限公司 | Method and apparatus for identification of DC input voltage transient speed |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997050162A1 (en) * | 1996-06-26 | 1997-12-31 | Hitachi, Ltd. | Motor driving apparatus |
| US5744927A (en) * | 1994-01-28 | 1998-04-28 | Mitsubishi Denki Kabushiki Kaisha | Inverter control method and apparatus |
| CN1865795A (en) * | 2005-05-19 | 2006-11-22 | 日立空调·家用电器株式会社 | Fan motor controller of air conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07231666A (en) * | 1994-02-21 | 1995-08-29 | Daikin Ind Ltd | Pwm control voltage inverter |
| JP4273805B2 (en) * | 2003-03-31 | 2009-06-03 | 株式会社豊田自動織機 | Power supply |
-
2007
- 2007-04-10 JP JP2007102472A patent/JP4356761B2/en not_active Expired - Fee Related
-
2008
- 2008-03-10 WO PCT/JP2008/054278 patent/WO2008126545A1/en active Application Filing
- 2008-03-10 CN CN2008800100445A patent/CN101652922B/en not_active Expired - Fee Related
- 2008-03-10 KR KR1020097019408A patent/KR101085877B1/en active IP Right Grant
- 2008-03-26 TW TW097110870A patent/TW200843323A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5744927A (en) * | 1994-01-28 | 1998-04-28 | Mitsubishi Denki Kabushiki Kaisha | Inverter control method and apparatus |
| WO1997050162A1 (en) * | 1996-06-26 | 1997-12-31 | Hitachi, Ltd. | Motor driving apparatus |
| CN1865795A (en) * | 2005-05-19 | 2006-11-22 | 日立空调·家用电器株式会社 | Fan motor controller of air conditioner |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2004-304924A 2004.10.28 |
| JP特开平7-231666A 1995.08.29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008263668A (en) | 2008-10-30 |
| JP4356761B2 (en) | 2009-11-04 |
| WO2008126545A1 (en) | 2008-10-23 |
| TW200843323A (en) | 2008-11-01 |
| KR20090111878A (en) | 2009-10-27 |
| CN101652922A (en) | 2010-02-17 |
| KR101085877B1 (en) | 2011-11-23 |
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