CN204119096U - A kind of phase compensating circuit of brshless DC motor - Google Patents
A kind of phase compensating circuit of brshless DC motor Download PDFInfo
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- CN204119096U CN204119096U CN201420585738.4U CN201420585738U CN204119096U CN 204119096 U CN204119096 U CN 204119096U CN 201420585738 U CN201420585738 U CN 201420585738U CN 204119096 U CN204119096 U CN 204119096U
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- resistance
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- brshless
- circuit
- phase
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Abstract
The utility model discloses a kind of phase compensating circuit of brshless DC motor, comprise the bleeder circuit of phase voltage part, PWM control auxiliary parallel circuits, static stable output bleeder circuit, the bleeder circuit of described phase voltage part is made up of the first resistance, the second resistance, the first electric capacity, PWM controls auxiliary parallel circuits and is made up of the 3rd resistance, the 4th resistance, the first triode, and static stable output bleeder circuit is made up of the 5th resistance, the 6th resistance, the 7th resistance.Phase compensating circuit of the present utility model can accurately control phase offset angle be constant is 30 degree, in addition, because the signal such as noise, burr carries out the problem that compensates to the compensate for disturbances of circuit by mistake under the state can also guaranteeing to avoid brshless DC motor to run with the pole slow-speed of revolution stop or at the early-stage etc., thus motor is better controlled.
Description
Technical field
The utility model relates to a kind of phase compensating circuit, particularly relates to a kind of phase compensating circuit of brshless DC motor.
Background technology
Brshless DC motor is through development for a long time, and application is very extensive till now, as automobile, instrument, industrial industry control, automation and Aero-Space etc.In following considerable time, brshless DC motor will continue to play its very important effect.For the phase compensating circuit of brshless DC motor, prior art just generally compensates phase place, and accuracy is not enough, is difficult to accomplish the fine compensation to phase deviation; Moreover brshless DC motor stop or at the early-stage etc. run with the pole slow-speed of revolution state time cannot judge that the signal such as noise, burr carries out mistake compensation to the compensate for disturbances of circuit, the various noises of motor internal cannot be eliminated, thus the high performance demand for control of brshless DC motor can not be met.
Utility model content
Technical problem to be solved in the utility model is: the phase compensating circuit providing a kind of brshless DC motor, accurately compensates phase deviation, and avoids the mistake caused by factors such as interference to compensate.
The utility model is for solving the problems of the technologies described above by the following technical solutions:
A phase compensating circuit for brshless DC motor, comprises the bleeder circuit of phase voltage part, PWM control auxiliary parallel circuits, static stable output bleeder circuit, phase voltage input, pwm signal end, power end, earth terminal; The bleeder circuit of described phase voltage part comprises the first resistance, the second resistance, the first electric capacity, PWM controls auxiliary parallel circuits and comprises the 3rd resistance, the 4th resistance, the first triode, and static stable output bleeder circuit comprises the 5th resistance, the 6th resistance, the 7th resistance; Phase voltage input is connected with first resistance one end, and the second resistance is connected with earth terminal with one end after the first Capacitance parallel connection; Pwm signal end is connected with the 4th resistance one end, and the 4th resistance other end is connected with the base stage of the first triode, and the emitter of the first triode is connected with earth terminal, and the collector electrode of the first triode is connected with the 3rd resistance one end; Power end is connected with the 7th resistance one end, and the 7th resistance other end is connected altogether with the 5th resistance one end, the 6th resistance one end, and the 6th resistance other end is connected with earth terminal; The 3rd resistance other end is connected altogether with the other end after the first resistance other end, the 5th resistance other end, the second resistance and the first Capacitance parallel connection.
Preferably, described power end is+15V voltage.
Preferably, the resistance of described 5th resistance is greater than the resistance of the first resistance.
Preferably, the resistance of described 5th resistance is greater than the resistance of the 7th resistance.
Preferably, the resistance of described 7th resistance is greater than the resistance of the 6th resistance.
The utility model adopts above technical scheme compared with prior art, has following technique effect:
1, the phase compensating circuit of the utility model brshless DC motor accurately can remain on 30 degree by control phase offset angle.
2, the compensate for disturbances of circuit is carried out to the problem that by mistake compensates due to the signal such as noise, burr under the state that the phase compensating circuit of the utility model brshless DC motor can guarantee to avoid brshless DC motor to run with the pole slow-speed of revolution stop or at the early-stage etc.
3, simple, the stable performance of the phase compensating circuit structure of the utility model brshless DC motor, failure rate is low.
4, the phase compensating circuit of the utility model brshless DC motor with low cost, be easy to safeguard, market is widely used.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the phase compensating circuit of the utility model brshless DC motor.
Fig. 2 is the theory diagram of the phase compensating circuit of the utility model brshless DC motor.
Embodiment
Be described below in detail execution mode of the present utility model, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
As shown in Figure 1, for the phase compensating circuit of the utility model brshless DC motor, comprise the bleeder circuit of phase voltage part, static stable output bleeder circuit, PWM control auxiliary parallel circuits, phase voltage input, pwm signal end, power end and earth terminal, wherein power end is+15V voltage.The bleeder circuit of described phase voltage part is made up of resistance R1, resistance R2, electric capacity C1, and its connection is: phase voltage input Ua is connected with resistance R1 one end, and resistance R2 is connected with earth terminal with one end after electric capacity C1 parallel connection; Described static stable output bleeder circuit is made up of resistance R5, resistance R6, resistance R7, and its connection is :+15V voltage is connected with resistance R7 one end, and the resistance R7 other end is connected with resistance R5 one end, resistance R6 one end, and the resistance R6 other end is connected with earth terminal; Described PWM controls auxiliary parallel circuits and is made up of resistance R3, resistance R4, triode T1, its connection is: pwm signal end is connected with resistance R4 one end, the resistance R4 other end is connected with triode T1 base stage, triode T1 emitter is connected with earth terminal, triode T1 collector electrode is connected with resistance R3 one end, in addition, the resistance R3 other end is connected altogether with the other end after the resistance R1 other end, the resistance R5 other end, resistance R2 and electric capacity C1 parallel connection.
The bleeder circuit of described phase voltage part, by resistance R1 and resistance R2, the phase voltage being gathered the brshless DC motor come by voltage acquisition module is carried out dividing potential drop, is the running preparatory condition of subsequent conditioning circuit.
Described static stable output bleeder circuit, by resistance R5 and resistance R6, carries out dividing potential drop by+15V voltage signal, stops or just having started etc. under with the state run compared with the slow-speed of revolution making this circuit have stable output at brshless DC motor.
Described PWM controls auxiliary parallel circuits, the PWM ripple signal of certain duty ratio is exported by single-chip microcomputer, certain saturation conduction time of triode T1 is controlled in one-period, thus the conduction time of controlling resistance R3 place in circuit, make its object in parallel with resistance R2 to reach.
The bleeder circuit of described phase voltage part, has theory to obtain: the computing formula of phase compensation angle α is:
(wherein f is back electromotive force frequency).When motor speed is different, back electromotive force frequency f is also different, single-chip microcomputer receives back electromotive force frequency f signal, the pusher that inside carries out calculating obtains the size of equivalent resistance, the signal exporting certain duty ratio by control PWM controls the saturation conduction time of triode T1, thus making resistance R3 place in circuit, the resistance that obtain the equivalent resistance that need in parallel with resistance R2, reaches the requirement of needs.
Described static stable output bleeder circuit, its resistance should meet following requirement: R5>>R1, R7>>R6, R5>>R7, meeting R5>>R1 is to reduce resistance R5, R6, R7 impact on phase compensating circuit.
As shown in Figure 2, operation principle of the present utility model is: on the basis of original circuit brshless DC motor, voltage acquisition module and back electromotive force zero passage detection, and the single-chip microcomputer containing PWM module, PWM are controlled auxiliary parallel circuits, the bleeder circuit of phase voltage part, static stable output bleeder circuit and output module and be connected in available circuit.Brshless DC motor is when running well, after single-chip microcomputer receives back electromotive force frequency signal, the size of equivalent resistance R2 is obtained by internal calculation, and send saturation conduction time of the PWM ripple signal controlling triode T1 of certain duty ratio and resistance R3 place in circuit time in parallel with resistance R2, obtain the equivalent resistance of the resistance needed, good control action can be played to circuit, thus ensure that phase compensation angle constant be 30 °, if the angle namely measured is 25 degree, then error compensation is exactly+5 degree; If the angle measured is 35 degree, then error compensation is exactly-5 degree.In addition, static stable output bleeder circuit is to make phase compensating circuit of the present utility model stop at brshless DC motor or can having a stable output under the low state of rotating speed, and after ensureing R5>>R1, static stable output bleeder circuit can be made substantially not affect phase compensating circuit under motor normal operative condition.So, can obtain the good control effects of motor.
Above embodiment is only and technological thought of the present utility model is described; protection range of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technical scheme basis is done, all falls within the utility model protection range.
Claims (5)
1. a phase compensating circuit for brshless DC motor, is characterized in that: comprise the bleeder circuit of phase voltage part, PWM control auxiliary parallel circuits, static stable output bleeder circuit, phase voltage input, pwm signal end, power end, earth terminal; The bleeder circuit of described phase voltage part comprises the first resistance, the second resistance, the first electric capacity, PWM controls auxiliary parallel circuits and comprises the 3rd resistance, the 4th resistance, the first triode, and static stable output bleeder circuit comprises the 5th resistance, the 6th resistance, the 7th resistance; Phase voltage input is connected with first resistance one end, and the second resistance is connected with earth terminal with one end after the first Capacitance parallel connection; Pwm signal end is connected with the 4th resistance one end, and the 4th resistance other end is connected with the base stage of the first triode, and the emitter of the first triode is connected with earth terminal, and the collector electrode of the first triode is connected with the 3rd resistance one end; Power end is connected with the 7th resistance one end, and the 7th resistance other end is connected altogether with the 5th resistance one end, the 6th resistance one end, and the 6th resistance other end is connected with earth terminal; The 3rd resistance other end is connected altogether with the other end after the first resistance other end, the 5th resistance other end, the second resistance and the first Capacitance parallel connection.
2. the phase compensating circuit of brshless DC motor as claimed in claim 1, is characterized in that: described power end is+15V voltage.
3. the phase compensating circuit of brshless DC motor as claimed in claim 1, is characterized in that: the resistance of described 5th resistance is greater than the resistance of the first resistance.
4. the phase compensating circuit of brshless DC motor as claimed in claim 1, is characterized in that: the resistance of described 5th resistance is greater than the resistance of the 7th resistance.
5. the phase compensating circuit of brshless DC motor as claimed in claim 1, is characterized in that: the resistance of described 7th resistance is greater than the resistance of the 6th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585738.4U CN204119096U (en) | 2014-10-10 | 2014-10-10 | A kind of phase compensating circuit of brshless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585738.4U CN204119096U (en) | 2014-10-10 | 2014-10-10 | A kind of phase compensating circuit of brshless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204119096U true CN204119096U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420585738.4U Expired - Fee Related CN204119096U (en) | 2014-10-10 | 2014-10-10 | A kind of phase compensating circuit of brshless DC motor |
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| CN (1) | CN204119096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992075A (en) * | 2021-11-22 | 2022-01-28 | 江苏科技大学 | Compensation circuit for phase delay of brushless direct current motor and control method |
-
2014
- 2014-10-10 CN CN201420585738.4U patent/CN204119096U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113992075A (en) * | 2021-11-22 | 2022-01-28 | 江苏科技大学 | Compensation circuit for phase delay of brushless direct current motor and control method |
| WO2023087985A1 (en) * | 2021-11-22 | 2023-05-25 | 江苏科技大学 | Compensation circuit and control method for phase delay of brushless direct-current electric motor |
| CN113992075B (en) * | 2021-11-22 | 2023-09-29 | 江苏科技大学 | Compensation circuit and control method for phase delay of brushless direct current motor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20151010 |
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| EXPY | Termination of patent right or utility model |