CN1246956C - Control device and method, control program and recording medium brushless DC. motor - Google Patents
Control device and method, control program and recording medium brushless DC. motor Download PDFInfo
- Publication number
- CN1246956C CN1246956C CNB031239382A CN03123938A CN1246956C CN 1246956 C CN1246956 C CN 1246956C CN B031239382 A CNB031239382 A CN B031239382A CN 03123938 A CN03123938 A CN 03123938A CN 1246956 C CN1246956 C CN 1246956C
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- Prior art keywords
- brushless
- motor
- rotor
- transistor
- position holding
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Classifications
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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
- H02P6/20—Arrangements for starting
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
-
- 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
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
- H02P6/085—Arrangements for controlling the speed or torque of a single motor in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
To securely start a brushless DC motor while reducing a power consumption. A position holding current is fed which holds for a prescribed time a rotor of the brushless DC motor at the startup of the brushless DC motor in a stopping state, the fed position holding current is made to circulate after the feed stop of the position holding current, and a startup current is fed in a state that the rotor is held in the stopping state by the position holding current flowing in a circulation path.
Description
Technical field
The present invention relates to the technology of X in brushless DC motor control device, control method, control program and recording medium, particularly reduce the use in the compressor of air conditioner etc. brushless DC motor starting current and improve the technology of starting probability.
Background technology
X in brushless DC motor control device in the past, such as, be illustrated in (Japan) spy and open in the flat 9-327194 communique.
The described X in brushless DC motor control device of Te Kaiping 9-327194 communique, use comes the position of detection rotor at the induced voltage of non-energising phase (the non-energising armature coil) generation of brushless DC motor, general position of not using magnetic pole position detecting element such as apertured member to discern rotor, based on detected like this position probing, switch the energising of the armature coil electric current of brushless DC motor.In addition, when this brushless DC motor starting beginning, keep halted state, never produce induced voltage, must carry out run-in synchronism etc. in order to make rotor.
More particularly, above-mentioned existing X in brushless DC motor control device is transformed to the DC power supply of regulation with AC power by the AC/DC converter unit, after changing with the conversion element of inverter unit, supplies with the armature coil of brushless DC motor.
When this brushless DC motor of control, position detecting circuit is set, position detecting circuit is the terminal voltage and the reference level of brushless DC motor relatively, and this comparative result is outputed to control circuit (microcomputer) as position detection signal.
Thus, control circuit carries out digital processing to the position detection signal of input, the drive signal (pwm signal) of energising of switching the armature coil electric current of brushless DC motor is outputed to the drive circuit of brushless DC motor, drive the conversion element of inverter unit.
; when above-mentioned existing brushless DC motor is applied to rotary compressor; moment after rotary compressor stops is if stop energising to brushless DC motor, then because the effect of the pressure in the rotary compressor and may make the contrary rotation of brushless DC motor.
Therefore, in order when restarting, to grasp the energising phase of rotor, when the position of the stop position that will be used to keep rotor holding current is supplied with brushless DC motor, if stop to supply with the position holding current in order to reduce consumption electric power, then there is brushless DC motor is reversed the problem of rotor-position skew.
In addition; position holding current when in the same old way continuing to supply with the brushless DC motor starting in order to prevent this rotor-position skew; when carrying out the transition to the starting current supply; following problem is arranged: produce the timing that the transistor both sides that make the CMOS structure that is connected in series that constitutes inverter become conducting state; flow through so-called perforation electric current and damage transistor, perhaps make starting failure because of protective circuit work.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of X in brushless DC motor control device, control method, control program and recording medium, reduce consumption electric power, carry out the starting of brushless DC motor simultaneously reliably.
For solving above-mentioned problem, the invention provides a kind of X in brushless DC motor control device, it is characterized in that this device comprises:
The rotor-position holding unit, when brushless DC motor started, supply was used to make the rotor of described brushless DC motor to keep the position holding current of stipulated time by halted state;
The circulation stream forms the unit, and after stopping to supply with described position holding current, formation makes the described position holding current of having supplied with carry out the circulation stream of circulation; And
The starting current feed unit by flowing through the described position holding current of described circulation stream, is supplied with starting current in that described rotor is remained under the state of described halted state,
Effective voltage when the effective voltage when by duty control described position being kept is set than described starting is low.
In the above-mentioned X in brushless DC motor control device of the present invention,
Described rotor-position holding unit comprises:
The 1st rotor-position holding unit is supplied with the 1st holding current as described position holding current, so that make described rotor keep halted state the 1st in mutually; And
The 2nd rotor-position holding unit is supplied with the 2nd holding current as described position holding current, so that make described rotor keep halted state with the 1st the mutually different the 2nd in mutually.
Description of drawings
Fig. 1 is the summary structured flowchart of the X in brushless DC motor control device of embodiment.
Fig. 2 is the timing diagram when driving usually.
Fig. 3 is the timing diagram in starting when control of the 1st embodiment.
Process chart when the starting of Fig. 4 the 1st embodiment is controlled.
Fig. 5 is the key diagram of loop current.
Fig. 6 is the timing diagram in starting when control of the 1st embodiment.
Process chart when the starting of Fig. 7 the 2nd embodiment is controlled.
Embodiment
Following with reference to description of drawings the preferred embodiments of the present invention.
[1] the 1st embodiment
Fig. 1 is the summary structured flowchart of the X in brushless DC motor control device of embodiment.
X in brushless DC motor control system 100 does not comprise AC power 1, AC/DC converter unit 2, inverter unit 3, brushless DC motor 4, position detecting circuit 5, control circuit 6 and drive circuit 7 greatly.
The AC power of 2 pairs of supplies of AC/DC converter unit is carried out the ac/dc conversion, supplies with inverter unit 3.
Inverter unit 3 is furnished with transistor T U, TV, TW, TX, TY, TZ as conversion element, under the control of control circuit 6 and drive circuit 7, to be transformed to the three-phase drive power supply from the DC power supply that AC/DC converter unit 2 is supplied with, and supply with brushless DC motor 4.
Brushless DC motor 4 is accepted to be driven from the three-phase drive power supply of inverter unit 3.
Position detecting circuit 5 detects the supply condition of three-phase drive power supply, detects the position of the not shown rotor of brushless DC motor 4, notice control circuit 6.
Control circuit 6 is made of so-called microcomputer, not shown microprocessor unit is according to the control program that is stored among the not shown ROM, various data are deposited with temporarily not to be had among the illustrated RAM, according to rotor-position, carry out the drive controlling of brushless DC motor 4 by drive circuit 7 from position detecting circuit 5 notices.
Drive circuit 7 constitutes transistor T U, TV, TW, the TX of inverter unit 3, the conduction and cut-off control of TY, TZ under the control of control circuit 6.
At first, before the concrete starting of explanation control, the outline operation when the common starting of brushless DC motor 4 of X in brushless DC motor control system 100 is described.
X in brushless DC motor control system 100 will be transformed into the DC power supply of defined from the AC power that AC power unit 1 is supplied with by AC/DC converter unit 2, suitably switch transistor T U, TV, TW, TX, TY, the TZ of inverter unit 3, with the armature coil of this direct-current power supply brushless DC motor 4.
Meanwhile, position detection part 5 is the terminal voltage (induced voltage that is limited) and the reference level of brushless motor 4 relatively, and this comparative result is outputed to control circuit 6 as position detection signal.
The position detection signal of 6 pairs of inputs of control circuit carries out digital processing, the drive signal (pwm signal) of energising of switching the armature coil electric current of brushless motor 4 is outputed to drive circuit 7, drive transistor T U, TV, TW, TX, TY, the TZ of inverter unit 3.Thus, drive brushless DC motor 4 according to desired rotation number rotation.
Fig. 2 is the timing diagram when driving usually.
As shown in Figure 2, it is conducting state that control circuit 6 is established transistor T Y at moment t1 by drive circuit 7, transistor T W is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, on one side by transistor T W by pulse width modulation (PWM; Such as, duty ratio is 50%), Yi Bian flow through the coil of the brushless DC motor 4 that is equivalent to the VW phase, drive rotor and turn back to AC/DC converter unit 2 by transistor T Y.
Equally, at moment t2, it is conducting state that control circuit 6 makes transistor T U by drive circuit 7, transistor T Y is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, flow through the coil of the brushless DC motor 4 that is equivalent to the UV phase by transistor T U, drive rotor simultaneously by transistor T Y by pulse width modulation (PWM), and turn back to AC/DC converter unit 2.
And at moment t3, control circuit 6 is made as conducting state to transistor T Z by drive circuit 7, transistor T U is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, pass through transistor T U on one side by pulse width modulation (PWM),, drive rotor and turn back to AC/DC converter unit 2 by transistor T Z Yi Bian flow through the coil of the brushless DC motor 4 that is equivalent to the UW phase.
At moment t4, it is conducting state that control circuit 6 is provided with transistor T V by drive circuit 7, transistor T Z is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, flow through the coil of the brushless DC motor 4 that is equivalent to the VW phase by transistor T V, pass through transistor T Z by pulse width modulation (PWM) while drive rotor, and turn back to AC/DC converter unit 2.
At moment t5, it is conducting state that control circuit 6 is provided with transistor T X by drive circuit 7, transistor T V is carried out PWM drive.Thus, the DC power supply that supplies to inverter unit 3 from AC/DC converter unit 2 is passed through transistor T V by pulse width modulation (PWM), flow through the coil of the brushless DC motor 4 that is equivalent to the UV phase simultaneously, drive rotor, and turn back to AC/DC converter unit 2 by transistor T X.
At moment t6, it is conducting state that control circuit 6 is provided with transistor T W by drive circuit 7, transistor T X is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, flow through the coil of the brushless DC motor 4 that is equivalent to the UW phase by transistor T W, drive rotor, and pass through transistor T X by pulse width modulation (PWM), turn back to AC/DC converter unit 2, finish a drive cycle of brushless DC motor 4.
And at moment t7, making transistor T Y once more by drive circuit 7 is conducting state, transistor T W is carried out PWM drive, below, repeat same processing, carry out the drive controlling of brushless DC motor 4.
The below starting control of explanation brushless DC motor 4.
Fig. 3 is the timing diagram in starting when control of the 1st embodiment.And Fig. 4 is the process chart in starting when control of the 1st embodiment.
As shown in Figure 3, at moment t11, it is conducting state that control circuit 6 makes transistor T Y by drive circuit 7, transistor T W is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3, carry out the pulse width modulation (PWM of rotor-position fixedly the time by transistor T W from AC/DC converter unit 2; For example duty ratio is 25[%]), flow through the coil of the brushless DC motor 4 that is equivalent to the VW phase simultaneously, drive rotor, and turn back to AC/DC converter unit 2 by transistor T Y.Therefore, the rotor of brushless DC motor 4 is fixed on the position (step S1) of defined.
Then, at moment t12, control circuit 6 makes transistor T Y be conducting state by drive circuit 7 in the same old way, and making transistor T W is cut-off state.Thus, diode Dz becomes conducting state, and loop current makes rotor remain on fixed position (step S2) by the coil that transistor T Y flows through the brushless DC motor 4 that is equivalent to the VW phase.
Afterwards, as shown in Figure 5, the loop current that flows through the coil of brushless DC motor 4 begins to reduce because of the resistive component of motor winding.
Therefore, reach at the loop current of the coil that flows through brushless DC motor 4 and to make the moment t13 of rotor before remaining on the moment TLIM of minimum current Imin of fixed position, it is conducting state that control circuit 6 makes transistor T Z by brushless drive circuit 7, transistor T U is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, by transistor T U by pulse width modulation (PWM), flow through the coil of the brushless DC motor 4 that is equivalent to the UW phase simultaneously, drive rotor, and turn back to AC/DC converter unit 2 (step S3) by transistor T Z.
Afterwards, carry out rotor position detection, brushless DC motor 4 carries out the transition to common driving, after the t13, carries out the transition to the later same common driving operating condition (step S4) with the moment t3 of Fig. 2 constantly.
As described above such, according to this 1st embodiment, when required electric current flows as loop current in the position that keeps rotor, transfer to the starting state of a control, so the rotor-position skew can not take place, can start reliably.In addition, because at rotor-position fixedly the time, perforation electric current does not flow through the transistor of the CMOS structure that constitutes inverter unit, so can prevent transistorized damage or cause fail to start because of transistorized protective circuit work.
In this case, in carrying out the PWM control of rotor-position fixedly the time, because be that the little duty ratio of duty ratio is controlled in the PWM control of using when moving, so can also reduce consumption electric power.
[2] the 2nd embodiment
In the 1st above embodiment, the fixed-site of rotor is handled and has only been carried out 1 time.The situation (the energising phase of fail to start) that control can not be started stops at once in a while at rotor that to close with the position of stator be on the settling position on the mechanics time, even can take place to start.
Therefore, the 2nd embodiment is more reliable for the starting that makes brushless DC motor, and rotor is fixed on the mutually different a plurality of positions of energising.
Fig. 6 is the timing diagram in starting when control of the 2nd embodiment.And Fig. 7 is the process chart in starting when control of the 2nd embodiment.
As shown in Figure 6, at moment t21, it is conducting state that control circuit 6 makes transistor T Y by drive circuit 7, transistor T W is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, carry out the pulse width modulation (PWM: for example duty ratio be 5%) of rotor-position fixedly the time by transistor T W, flow through the coil of the brushless DC motor 4 that is equivalent to the VW phase simultaneously, drive rotor, and turn back to AC/DC converter unit 2 by transistor T Y.Therefore, the rotor of brushless DC motor 4 is fixed on the 1st assigned position, or keep rotor to stop to close with the position of stator be to be on the mechanics on the position stable, fail to start (can not rotate) (step S11) in the same old way.
Then, at moment t22, it is conducting state that control circuit 6 makes transistor T U by drive circuit 7, transistor T Y is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3, flow through the coil of the brushless DC motor 4 that is equivalent to the UV phase, drive rotor by transistor T U from AC/DC converter unit 2, by transistor T Y by pulse width modulation (PWM; For example duty ratio is 5%), and turn back to AC/DC converter unit 2.
Thus, the rotor of brushless DC motor 4 is fixed on the position (step S12) of the 2nd regulation.In other words, to close with the position of stator be to be in position stable, fail to start (can not rotate) on the mechanics even rest at step S11 rotor, there, but also finished fixing to the start position.
Then, at moment t23, it is conducting state that control circuit 6 makes the state of transistor T U by drive circuit 7, and making transistor T Y simultaneously is cut-off state.Thus, diode DV becomes conducting state, and loop current makes rotor remain on fixed position (step S13) by the coil that transistor T U flows through the brushless DC motor 4 that is equivalent to the UW phase.
Afterwards, as shown in Figure 5, the loop current that flows through the coil of brushless DC motor 4 begins to reduce because of the resistive component of motor winding.
Therefore, reach at the voltage of the loop current of the coil that flows through brushless DC motor 4 and can make the moment t24 of rotor before remaining on the moment TLIM of the required minimum current Imin in fixed position, it is conducting state that control circuit 6 makes transistor T V by drive circuit 7, transistor T Z is carried out PWM drive.Thus, supply to the DC power supply of inverter unit 3 from AC/DC converter unit 2, flow through the coil of the brushless DC motor 4 that is equivalent to the VW phase by transistor T V, drive rotor, pass through transistor T Z simultaneously by pulse width modulation (PWM), and turn back to AC/DC converter unit 2 (step S14).
Afterwards, carry out position probing, brushless DC motor 4 transfers common driving to, after moment t24, transfers the later identical common starting operation state (step 15) with the moment t4 of Fig. 2 to.
As described above, according to this 2nd embodiment, make rotor remain on the position of regulation reliably, and then in the position that keeps rotor when required electric current flows as loop current, be converted to the starting state of a control,, start reliably so the rotor-position skew can not take place.Also have, same with the 1st embodiment, when the fixed-site of rotor, perforation electric current does not flow through the transistor of the CMOS structure that constitutes inverter unit, so can prevent transistorized damage or because of transistorized protective circuit work fail to start.
Even in this case, in carrying out the PWM control of rotor-position fixedly the time, because the also little duty ratio of duty ratio in the PW control when using than common starting control controls, so can also reduce consumption electric power.
[3] variation of embodiment
In the above description, situation about being used in brushless DC motor on the compressor of air-conditioning equipment is that example is illustrated, but is not limited thereto, and utilizes the various machines of the starting control of brushless DC motor applicable to needs, such as fan motor etc.
In the above description, control is handled in the ROM that constitutes control circuit with procedure stores, but also control program can be stored in the recording mediums such as hard disk, removable recording medium, IC-card, read and carry out, perhaps by network download control programs such as the Internets, and carry out control program.
According to the present invention, can reduce consumption electric power, simultaneously brushless DC motor is started reliably.
Claims (2)
1. an X in brushless DC motor control device is characterized in that, this device comprises:
The rotor-position holding unit, when brushless DC motor started, supply was used to make the rotor of described brushless DC motor to keep the position holding current of stipulated time by halted state;
The circulation stream forms the unit, and after stopping to supply with described position holding current, formation makes the described position holding current of having supplied with carry out the circulation stream of circulation; And
The starting current feed unit by flowing through the described position holding current of described circulation stream, is supplied with starting current in that described rotor is remained under the state of described halted state,
Effective voltage when the effective voltage when by duty control described position being kept is set than described starting is low.
2. X in brushless DC motor control device as claimed in claim 1 is characterized in that, described rotor-position holding unit comprises:
The 1st rotor-position holding unit is supplied with the 1st holding current as described position holding current, so that make described rotor keep halted state the 1st in mutually; And
The 2nd rotor-position holding unit is supplied with the 2nd holding current as described position holding current, so that make described rotor keep halted state with the 1st the mutually different the 2nd in mutually.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP246855/2002 | 2002-08-27 | ||
| JP246855/02 | 2002-08-27 | ||
| JP2002246855A JP3877658B2 (en) | 2002-08-27 | 2002-08-27 | Brushless DC motor control device, control method, control program, and recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1479446A CN1479446A (en) | 2004-03-03 |
| CN1246956C true CN1246956C (en) | 2006-03-22 |
Family
ID=32024475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031239382A Expired - Fee Related CN1246956C (en) | 2002-08-27 | 2003-05-22 | Control device and method, control program and recording medium brushless DC. motor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3877658B2 (en) |
| KR (1) | KR100546518B1 (en) |
| CN (1) | CN1246956C (en) |
| TW (1) | TWI227591B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405736C (en) * | 2005-02-23 | 2008-07-23 | 三菱重工业株式会社 | Method and apparatus for controlling motor |
| DE102007060877A1 (en) * | 2007-12-18 | 2009-06-25 | Robert Bosch Gmbh | Method for sensorless operation of an electric, electronically commutating machine |
| JP5175134B2 (en) * | 2008-05-16 | 2013-04-03 | 日本リライアンス株式会社 | Bidirectional converter and generation method thereof |
| CN105048900B (en) * | 2015-06-23 | 2017-11-03 | 西北工业大学 | Double winding brshless DC motor frequency multiplication control circuit of chopping and winding switching method |
-
2002
- 2002-08-27 JP JP2002246855A patent/JP3877658B2/en not_active Expired - Fee Related
-
2003
- 2003-04-03 TW TW092107608A patent/TWI227591B/en not_active IP Right Cessation
- 2003-05-22 CN CNB031239382A patent/CN1246956C/en not_active Expired - Fee Related
- 2003-08-26 KR KR1020030058961A patent/KR100546518B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004088914A (en) | 2004-03-18 |
| KR100546518B1 (en) | 2006-01-26 |
| TW200403921A (en) | 2004-03-01 |
| TWI227591B (en) | 2005-02-01 |
| CN1479446A (en) | 2004-03-03 |
| KR20040018968A (en) | 2004-03-04 |
| JP3877658B2 (en) | 2007-02-07 |
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