CN1282298C - Parallel driving method for DC brushless motors - Google Patents
Parallel driving method for DC brushless motors Download PDFInfo
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- CN1282298C CN1282298C CNB2003101169339A CN200310116933A CN1282298C CN 1282298 C CN1282298 C CN 1282298C CN B2003101169339 A CNB2003101169339 A CN B2003101169339A CN 200310116933 A CN200310116933 A CN 200310116933A CN 1282298 C CN1282298 C CN 1282298C
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- motor
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- switching device
- brushless
- motors
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Abstract
Provided is the parallel drive method of a DC brushless motor capable of providing a sufficiently high starting torque without complexing nor upsizing the entire arrangement. The parallel drive method drives DC brushless motors (M1 and M2) connected in parallel at the same speed by a controller (200) equipped with an inverter (202). Relays (Ry1 and Ry2) are connected between the inverter (202) and the motors (M1 and M2), respectively. At starting, one relay (Ry1) is turned on to accelerate the motor (M1), and then the relay (Ry1) which is in on-state is turned off to allow the motor (M1) to rotate through inertia. After that, the relay (Ry2) corresponding to the other motor (M2) is turned on to accelerate the motor (M2). When the difference in phase angle between the positions of rotors of the motors (M1 and M2) comes to be within a set value, both motors (M1 and M2) are determined to be in synchronism, and the relay (Ry1) corresponding to the motor (M1) is turned on for parallel operation of two motors (M1 and M2).
Description
Technical field
The present invention relates to a kind of driving method in parallel that drives many DC brushless motors that are connected in parallel mutually in order to turn round many desk fans or pump with identical speed.
Background technology
As the prior art that drives many DC brushless motors that are connected in parallel mutually by a drive circuit, known parallel driver circuit as shown in Figure 8.
In Fig. 8, the 100th, AC power; 200 ' is the controller of drive circuit; M
1, M
2It is the DC brushless motor of for example three-phase (U, V, W phase) of parallel running; 301, the 302nd, detect each motor M mutually according to each of U, V, W phase
1, M
2The position detecting element of Hall element etc. of rotor-position; The 201st, thereby with the ac voltage rectifier of AC power 100, the rectification/smoothing circuit of the level and smooth direct voltage that obtains stipulating; The 202nd, at motor M
1, M
2The three-phase voltage shape inverter of the through-flow usefulness of each phase stator coil; The 203rd, by the output signal detection rotor position of position detecting element 301,302 and the position detecting circuit of rotary speed; The 204th, output motor M
1, M
2The speed control circuit of running, halt instruction and speed pattern (speed command); The 205th, the control computing circuit, it carries out PWM computing etc. based on the output voltage instruction that speed pattern and rotary speed detected value produce inverter 202 with it and carrier wave ratio; 206 output signals (pwm signal) that are based on control computing circuit 205 produce the starting the arc logical circuit of drive signal (starting the arc signal) to each switch element of inverter 202.
Fig. 9 is the time flow chart when this parallel driver circuit starting.
If at moment T
1The instruction of turning round is at due in T
2Between, by inverter 202 direct voltage is applied to each motor M
1, M
2Stator coil on.
Like this, at motor M
1, M
2Coil flow through identical direct current, each magnetic pole of stator is same magnetic by excitation, each motor M that is formed by permanent magnet
1, M
2Rotor be pulled to the position at identical phase angle.
At this moment, each motor M
1, M
2The phase angle of rotor identical, so, if from as shown in Figure 9 moment T
3Slowly improve and apply voltage, acceleration successively, 2 motor M
1, M
2Quicken simultaneously, approximately constantly T
4To apply the running that voltage is transferred to regulation later on.
And, for example putting down in writing parallel driver circuit in the Patent Document 1, this parallel driver circuit is, the output voltage of 1 drive circuit that will be formed by inverter equally is applied on many DC brushless motors that are connected in parallel and drives the parallel driver circuit of the DC brushless motor of these motors.
Patent Document 1: the spy open the 2003-37987 communique (Fig. 1, Fig. 3).
At above-mentioned Fig. 8, in the prior art of Fig. 9, offer each motor M owing to the output current of inverter 202 is divided equally in when starting
1, M
2So, be difficult to obtain big starting torque.For this reason, under situation about using,, when snow or ice stick on the fan, just can not start smoothly in winter at for example outdoor fan etc.
In addition, for the starting torque that obtains wishing, consideration will comprise that the controller of inverter is arranged on each motor and drive, but have device integral body complicated, maximize the problem that cost is also high.
Summary of the invention
The invention provides a kind of driving method in parallel of DC brushless motor, it is the complicated and maximization of generation device integral body not, obtains very large starting torque.
In order to address the above problem, as described in first aspect present invention, in the driving method in parallel of DC brushless motor, many DC brushless motors that will be connected in parallel mutually by the drive circuit with a plurality of thyristors are with identical speed drive,
Between the outlet side of above-mentioned drive circuit and each motor, connect switching device respectively,
When starting, the switching device of corresponding 1 motor is connected, after quickening this motor, the above-mentioned switching device that will be in on-state cuts out, inertia rotates above-mentioned 1 motor, afterwards, connect the switching device of corresponding other motor, quicken this other motor, simultaneously, when the difference at the phase angle of the rotor-position of the phase angle of the rotor-position of above-mentioned 1 motor and above-mentioned other motor is within the set point time, judge that these motors are synchronous, the switching device of above-mentioned 1 motor of correspondence is connected many motors of parallel running.
As described in second aspect present invention, as judging many conditions that motor is synchronous, except that the phase angle difference as the rotor-position of described each motor of first aspect present invention was condition within the set point, the difference that also adopts the rotary speed of each motor was as condition within the set point.
As described in third aspect present invention, in the driving method in parallel of the present invention first or the described DC brushless motor of second aspect,
Under the state that the switching device of above-mentioned other motor of correspondence is connected, during many motors of parallel running, the rotary speed of each motor when parallel running is begun is kept certain hour by the switching device of above-mentioned 1 motor of correspondence is connected.
As described in fourth aspect present invention, in the driving method in parallel of the present invention first, second or the described DC brushless motor of the third aspect,
From the rotor position detection signal of each motor every detect mutually logic and or logic product, at every control rotor position detection signal that makes mutually, use the rotor position detection signal based on these controls, make drive signal corresponding to the thyristor in the above-mentioned drive circuit.
And, as the described drive circuit of the present invention's first～fourth aspect, as described in fifth aspect present invention, use for example three-phase voltage shape inverter.
Description of drawings
Fig. 1 is the block diagram that is used for the parallel driver circuit of embodiment of the present invention.
Time diagram when Fig. 2 is the starting of embodiment of the present invention.
Fig. 3 is the flow chart of expression corresponding to the starting method of Fig. 2.
Fig. 4 is the flow chart of other starting method of expression embodiment of the present invention.
Fig. 5 is the flow chart of another starting method of expression embodiment of the present invention.
Fig. 6 is the pie graph of an example of the position detecting circuit of presentation graphs 1.
Fig. 7 is the time diagram of the operation of presentation graphs 6.
Fig. 8 is the block diagram of the parallel driver circuit of expression prior art.
Fig. 9 is in the prior art, the time diagram during starting.
Symbol description: 100 AC power; 200 controllers; 201 rectifications/smoothing circuit; 202 three-phase voltage shape inverters; 2031,2032 position detecting circuits; 204 speed control circuits; 205 control computing circuits; 206 starting the arc logical circuits; 301,302 position detecting elements; 41UA, 41VA, 41WA, 41UB, 41VB, 41WB: and circuit; 42U, 42V, 42W: or circuit; 43 running motors are selected circuit; M
1, M
2The DC brushless motor; R
Y1, R
Y2Relay.
Embodiment
Embodiments of the present invention are described with reference to the accompanying drawings.
At first, Fig. 1 is the block diagram of the formation of the parallel driver circuit that uses of expression embodiment of the present invention.The composed component identical with Fig. 8 given identical mark.
In Fig. 1, the 200th, the controller of the drive circuit that embodiment of the present invention is used, corresponding each motor M
1, M
2The output signal of the position detecting element 301,302 that is provided with is input in each position detecting circuit 2031,2032, and the output signal of these output signals and speed control circuit 204 is input in the control computing circuit 205 jointly.
Export in order to control the drive signal of three-phase voltage shape inverter 202 to starting the arc logical circuit 206 from control computing circuit 205, meanwhile, output drives outlet side and each the motor M that is connected inverter 202 respectively
1, M
2Between the relay R as switching device
Y1, R
Y2Control signal.
Secondly, the time diagram when Fig. 2 is the starting of embodiment of the present invention, Fig. 3 is the flow chart of corresponding diagram 2.
The starting method of embodiment of the present invention is described below with reference to these figure.
At first, if at the moment of Fig. 2 T
11The running instruction is provided for control computing circuit 205, control computing circuit 205 makes motor M
1The relay R of side
Y1For connecting (ON), only CD-ROM drive motor M
1(S1 of Fig. 3, S2).
Through after the certain hour, (S3 of Fig. 3) is at moment T
12, with relay R
Y1Become disconnection (OFF), meanwhile, relay R
Y2Become connection (ON), CD-ROM drive motor M
2(S4 of Fig. 3, S5).And, in relay R
Y1Become disconnection (OFF) afterwards, motor M
1The inertia rotation.
At this state, based on the position detection signal from position detecting circuit 2031,2032 outputs, control computing circuit 205 is obtained each motor M
1, M
2Phase angle [alpha]
1, α
2Poor, if this difference is within the set point α, with motor M
1The relay R of side
Y1Connect (ON) (S6 of Fig. 3, S7).And, in Fig. 2, suppose at moment T
13Phase angle [alpha]
1, α
2Difference be within the set point α.
Here, if α is set at two motor M
1, M
2Be considered as the smaller value of synchronous degree, in phase angle [alpha]
1, α
2Difference be in moment within the set point α, can be with two motor M
1, M
2Be judged as synchronously, become connection (ON) if will disconnect the relay R y1 of (OFF) state this moment, then can be with two motor M
1, M
2With the synchronous regime parallel running.
Then, at moment T
13Afterwards, also can quicken up to the speed of setting (S8 of Fig. 3) by speed control circuit 204.
And, though described the motor M of Fig. 2
1, M
2Phase angle [alpha]
1, α
2The situation that straight line changes, but phase angle [alpha] in fact
1, α
2Change with sine wave.
Fig. 4 is a flow chart of representing other starting method.
In the starting method of Fig. 3, if at motor M
1, M
2The low-down moment of speed detect just no problemly synchronously, but only the difference at phase angle is within the set point as the synchronous detecting condition, just have following situation, at motor M
1, M
2The very big situation of the difference of rotary speed under, can not smoothly transfer to run-in synchronism.
Like that, as shown in Figure 4, the difference of rotary speed is made as smaller value N, motor M
1, M
2Speed N
1, N
2Difference be within the set point N, and, in phase angle [alpha]
1, α
2Difference be in moment within the set point α, with two motor M
1, M
2Be judged as (S16 of Fig. 4, S17) synchronously.And S11～S15 of Fig. 4, S18, S19 are the S1～S5 with Fig. 3, S7, the program that S8 essence is identical.
Here, motor M
1, M
2Speed N
1, N
2Can easily detect by position detecting circuit 2031,2032 the frequencies of Fig. 1 from detection signal.
Below, Fig. 5 is the flow chart of the starting method of expression another other.
By the starting method of Fig. 3, be within the set point in difference and judge synchronously and two motor M from the phase angle
1, M
2Under the situation of parallel running, parallel running begins to have soon situation about remaining at some speed difference and phase angle difference, if quicken immediately at this state, can not quicken apace.
Like that, as shown in Figure 5, the difference at phase angle is within the set point, by disconnecting the relay R of (OFF) state
Y1Become connection (ON) and begin two motor M
1, M
2Parallel running after, with two motor M of present speed running
1, M
2Certain time interval T only
x(S28 of Fig. 5) quickens afterwards up to setting speed (S29 of Fig. 5).S21～S27 of Fig. 5, S29 are and S1～S7 of Fig. 3, the program that S8 essence is identical.
In Fig. 2, from moment T
13The beginning parallel running, but as according to starting method shown in Figure 5, at moment T
13Afterwards, do not add speed motor M immediately
1, M
2Speed N
1, N
2, T constantly shown in dotted line
13Speed keep official hour.
, the following describes the processing method of the position detection signal of following situation here, that is, and as Fig. 2, shown in Figure 3, at moment T
13Judge two motor M
1, M
2Be synchronously, afterwards, parallel running two motor M
1, M
2, the situation of Jia Suing immediately.
An object lesson of the position detecting circuit 2031,2032 of Fig. 6 presentation graphs 1.
In Fig. 6, UA, VA, WA are the rotor position detection signals of motor M1, and UB, VB, WB are motor M
2The rotor position detection signal.The control of using in working control rotor position detection signal, use 6 and circuit (AND circuit) 41UA, 41VA, 41WA, 41UB, 41VB, 41WB and 3 or circuit (OR circuit) 42U, 42V, 42W, utilize the running motor to select the output signal of circuit 43, select to use motor M
1The rotor position detection signal or select to use motor M
2The rotor position detection signal, perhaps, select to use motor M
1, M
2The rotor position detection signal logic and.
That is, when initial start (by the step S2 of Fig. 3 with relay R
Y1Become connection (ON), after step S3 process certain hour), the running motor selects the output A of circuit 43 (corresponding to motor M
1) be high level, output B (corresponding to motor M2) is a low level.Like this, be imported into and the motor M of circuit (AND circuit) 41UA, 41VA, 41WA
1Rotor position detection signal UA, VA, the WA former state is imported into or circuit (OR circuit) 42U, 42V, 42W, but owing to the output signal with circuit 41UB, 41VB, 41WB often is a low level, use the rotor position detection signal as control, only use motor M effectively
1Rotor position detection signal UA, VA, WA.
Similarly, step below is (by the step S4 of Fig. 3 with relay R
Y1Become disconnection (OFF), by step S5 with relay R
Y2Become connection (ON) afterwards) in, the running motor selects the output B of circuit 43 to become high level, and output A becomes low level.Like this, use the rotor position detection signal, only effectively utilize motor M as control
2Rotor position detection signal UB, VB, WB.
Then, if by detected each motor of Fig. 6 M
1, M
2The difference at phase angle of each phase be in (the step S6 of Fig. 3) within α °, in following step, by the step S7 of Fig. 3 with relay R
Y1Become connection (ON), the motor that will turn round is simultaneously selected the output A of circuit 43, is all become high level.
Like this, motor M
1, M
2Rotor position detection signal UA, VA, WA, UB, VB, WB all be input to or circuit 42U, 42V, 42W in, each motor M
1, M
2The rotor position detection signal logic with as control with the rotor position detection signal output to each mutually in.Afterwards, two motor M
1, M
2Accelerate to setting speed (the step S8 of Fig. 3).
And, in Fig. 6, at 2 motor M of parallel running
1, M
2Situation under, use each motor M
1, M
2Each phase the rotor position detection signal logic and, obtain control and use the rotor position detection signal, use the rotor position detection signal but also can use the logic product of the rotor position detection signal of each phase to obtain to control.
In addition, the function of Fig. 6 also can all be replaced by microcomputer and be realized.
Fig. 7 represents motor M
1, M
2Fully synchronously, the situation of the rotor position detection signal Synchronization of each phase.In this case, motor M
1, M
2The rotor position detection signal and or the output signal of circuit 42U, 42V, 42W, i.e. control becomes whole identical signals with the rotor position detection signal.That is expression motor M,
1, M
2Run-in synchronism mutually.
In the above-described embodiment, the situation of 2 DC brushless motors of parallel running has been described, but method of operation of the present invention also can be used for the situation of the motor of parallel running more than 3.
In addition, the relay R of Fig. 1
Y1, R
Y2The contact is arranged, all it doesn't matter not have the contact, simultaneously as switching device, also can use the semiconductor switch except that relay.
According to the invention described above, the electric current serial afterwards, owing to transfer to parallel running synchronously from many motors, can realize in fact and starts the same effect of each motor by separate controller by every motor when making starting.Like this, for each motor provides sufficient starting current, can access big starting torque.
In addition, owing to needn't controller be set according to the platform number of motor, the complicated or maximization that can not cause device to constitute also helps to reduce cost.
Claims (5)
1. the driving method in parallel of a DC brushless motor, the drive circuit by having a plurality of thyristors is characterized in that with many DC brushless motors that identical speed drive is connected in parallel mutually,
Between the outlet side of described drive circuit and each motor, connect switching device respectively,
When starting, the switching device of corresponding 1 motor is connected, and after quickening this motor, the described switching device that will be in on-state cuts out, described 1 motor inertia rotation, afterwards, connect the switching device of corresponding other motor, quicken this other motor, simultaneously, when the difference at the phase angle of the rotor-position of the phase angle of the rotor-position of described 1 motor and described other motor is within the set point time, the switching device of described 1 motor of correspondence is connected many motors of parallel running.
2. the driving method in parallel of a DC brushless motor, the drive circuit by having a plurality of thyristors is characterized in that with many DC brushless motors that identical speed drive is connected in parallel mutually,
Between the outlet side of described drive circuit and each motor, connect switching device respectively,
When starting, the switching device of corresponding 1 motor is connected, after quickening this motor, the described switching device that will be in on-state cuts out, described 1 motor inertia rotation, afterwards, connect the switching device of corresponding other motor, quicken this other motor, simultaneously, when the difference of the rotary speed of the rotary speed of described 1 motor and described other motor is within the set point time, and, when the difference at the phase angle of the rotor-position of the phase angle of the rotor-position of described 1 motor and described other motor is within the set point time, the switching device of described 1 motor of correspondence is connected many motors of parallel running.
3. the driving method in parallel of DC brushless motor as claimed in claim 1 or 2 is characterized in that,
When under the state that the switching device of described other motor of correspondence is connected, during many motors of parallel running, the rotary speed of each motor when parallel running is begun is kept certain hour by the switching device of described 1 motor of correspondence is connected.
4. the driving method in parallel of DC brushless motor as claimed in claim 1 or 2 is characterized in that,
From the logic of the described rotor position detection signal of each phase of each motor of rotor position detection input of each motor and or logic product, each of described each motor is made control rotor position detection signal mutually, use the rotor position detection signal based on these controls, make drive signal corresponding to the thyristor in the described drive circuit.
5. the driving method in parallel of DC brushless motor as claimed in claim 1 or 2 is characterized in that, constitutes described drive circuit by three-phase voltage-type inverter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003143569 | 2003-05-21 | ||
| JP2003143569A JP4147399B2 (en) | 2003-05-21 | 2003-05-21 | DC brushless motor parallel drive method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1574594A CN1574594A (en) | 2005-02-02 |
| CN1282298C true CN1282298C (en) | 2006-10-25 |
Family
ID=33531323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101169339A Expired - Fee Related CN1282298C (en) | 2003-05-21 | 2003-12-03 | Parallel driving method for DC brushless motors |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4147399B2 (en) |
| CN (1) | CN1282298C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI748866B (en) * | 2021-02-05 | 2021-12-01 | 陞達科技股份有限公司 | Fan system and fan driving method |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007156154A (en) | 2005-12-06 | 2007-06-21 | Brother Ind Ltd | Motor control apparatus, image forming apparatus, and motor control method |
| JP5254605B2 (en) * | 2007-12-26 | 2013-08-07 | ナブテスコ株式会社 | Drive device and manufacturing method thereof |
| JP5218818B2 (en) * | 2008-02-26 | 2013-06-26 | 富士電機株式会社 | DC brushless motor parallel drive circuit |
| JP5504748B2 (en) * | 2009-08-20 | 2014-05-28 | 富士電機株式会社 | Inverter device |
| CN102611286A (en) * | 2011-12-21 | 2012-07-25 | 广东美的电器股份有限公司 | High-integrated intelligent power module |
| WO2013149639A1 (en) * | 2012-04-02 | 2013-10-10 | Siemens Aktiengesellschaft | Electrical drive arrangement |
| CN104052342B (en) * | 2013-03-13 | 2016-11-02 | 广东美的制冷设备有限公司 | A kind of motor control assembly and there is its air-conditioning system |
| JPWO2018185878A1 (en) * | 2017-04-05 | 2019-11-07 | 三菱電機株式会社 | Synchronous motor drive device, blower and air conditioner |
| US11424698B2 (en) | 2019-01-16 | 2022-08-23 | Mitsubishi Electric Corporation | Motor control device and air-conditioning device |
| JP7292049B2 (en) * | 2019-02-19 | 2023-06-16 | キヤノン株式会社 | Motor control device and image forming device |
| DE112019007002T5 (en) * | 2019-03-07 | 2021-12-02 | Mitsubishi Electric Corporation | MOTOR CONTROL DEVICE |
| WO2021056470A1 (en) * | 2019-09-27 | 2021-04-01 | 深圳市大疆创新科技有限公司 | Motor module, scanning module, distance measuring device, and control methods |
| CN114876839B (en) * | 2021-02-05 | 2024-06-07 | 升达科技股份有限公司 | Fan system and fan driving method |
-
2003
- 2003-05-21 JP JP2003143569A patent/JP4147399B2/en not_active Expired - Fee Related
- 2003-12-03 CN CNB2003101169339A patent/CN1282298C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI748866B (en) * | 2021-02-05 | 2021-12-01 | 陞達科技股份有限公司 | Fan system and fan driving method |
| US12104611B2 (en) | 2021-02-05 | 2024-10-01 | Sentelic Corporation | Fan system and fan driving method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4147399B2 (en) | 2008-09-10 |
| CN1574594A (en) | 2005-02-02 |
| JP2004350385A (en) | 2004-12-09 |
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