CN106342389B - Brshless DC motor sinusoidal drive device - Google Patents
Brshless DC motor sinusoidal drive deviceInfo
- Publication number
- CN106342389B CN106342389B CN200810078445.6A CN200810078445A CN106342389B CN 106342389 B CN106342389 B CN 106342389B CN 200810078445 A CN200810078445 A CN 200810078445A CN 106342389 B CN106342389 B CN 106342389B
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- CN
- China
- Prior art keywords
- circuit
- motor
- sinusoidal
- brshless
- drive device
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- Expired - Fee Related
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Abstract
The present invention discloses a kind of brshless DC motor sinusoidal drive device, its composition comprises: microprocessor and interface circuit, power supply circuits, driving isolation circuit, power inversion circuit and holding circuit, and described driving isolation circuit is connected with power inversion circuit with microprocessor and interface circuit respectively; Power inversion circuit is connected with brshless DC motor, microprocessor and interface circuit are connected with the hall circuitboard output in motor, the cycle sinusoidal signal that gathers Hall integrated circuit output, the rotor signal sensing according to linear Hall integrated circuit and stator winding phase relation obtain the sinusoidal modulation wave of rotor position information and each stator winding electrifying. Sinusoidal modulation wave and carrier modulation generation SPWM ripple are powered to stator winding, and motor winding powers up electric current for sinusoidal wave, and motor torque fluctuation is little. The motor weight having solved under prior art condition increases, and the problems such as length lengthening or complex process have the advantages such as noise is little, start and stop quick, reliable operation.
Description
Technical field
The technology of the present invention belongs to Electric Machine Control (Motor control) technical field, and relating generally to one can be to permanent-magnet brushless DC electric machine (bagDraw together slot-less and Alveolus type) with the device of sine wave drive.
Background technology
Permanent-magnet brushless DC electric machine is made up of parts such as motor body, position detecting device and electronics phase changers. According to stator structure, be divided into toothThe large class of slot type and slot-less (drag cup type) two. Distribute according to the corresponding every phase magnetic flux gesture of rotor, be divided into again square-wave motor and sineTwo kinds, ripple motor, the former every phase magnetic flux gesture is square-wave-shaped and distributes; The latter's the sinusoidal wave shape that is distributes. Motor drive mode is because of rotor structureDifference can be divided into has position probing and without two kinds of modes of position probing.
There is position probing to comprise square-wave motor and sinusoidal wave motor. Square-wave motor adopts square wave to drive. The general simple type position detector that uses,Accuracy of detection only has (180/ number of phases) ° electrical angle conventionally, only can meet the requirement of motor commutation, exact position that can not detection rotor. JustString ripple motor adopts sinusoidal drive. The general external position detectors such as rotary transformer or absolute type encoder that adopt, examine external positionSurvey device and be arranged on motor body rear end (definition output shaft is front end), lead motor weight processed and increase, size extends. The hollow cup permanent magnetic of slotlessBrshless DC motor, in the time adopting sinusoidal drive mode, uses the external position detectors such as rotary transformer or absolute type encoder, its weightGently, the little good characteristic of volume will can not get fully demonstrating.
Representative method without position probing mode adopts counter electromotive force detection method. The method in the time of electric motor starting, because counter electromotive force is zero, palpusFirst use other method starter motor, then be switched to the method for operation of utilizing counter electromotive force detection position. Should not only there is in this way motorStarting problem. Importantly can not be applied in and need response fast, the accurate occasion of controlling.
Also having a kind of method is to paste some non-magnetic conductive materials on the surface of p-m rotor, while utilizing the work of stator winding HF switch, non-Eddy current effect on magnetic material makes the size of open phase voltage change with rotor-position, judges rotor-position by detecting open phase voltage,The shortcoming of the method is very high to the manufacture process requirement of motor.
Summary of the invention
The technical problem to be solved in the present invention is: provide that a kind of mounting process is simple, response fast, drive the hollow cup permanent magnetic that precision is high brushlessDirect current generator sinusoidal drive device, what solve existing motor driver existence makes motor weightening finish large, size prolongation and response speed and controlThe existing defect in aspect.
The scheme of technical solution problem of the present invention is: the composition of the brshless DC motor sinusoidal drive device providing comprises: microprocessor and connecingMouth circuit, power supply circuits, driving isolation circuit, power inversion circuit and holding circuit, described driving isolation circuit input end and microprocessorAnd the output of interface circuit is connected, output is connected with power inversion circuit; Power inversion circuit is connected with brshless DC motor, micro-processingDevice and interface circuit are connected with the hall circuitboard output in motor, gather the cycle sinusoidal signal of Hall integrated circuit output, carry out standardNormalized, according to signal amplitude and correlation, judges working rotor interval, obtains rotor electrical angle; Again by the each winding phase of statorPosition relation calculates each winding modulating wave, generates Sine Pulse Width Modulation (sinusoidal pulse width modulation) ripple export to driving isolation electricity with carrier modulationRoad, driving power inverter circuit is reverse into pulse modulation voltage by DC bus-bar voltage and powers to motor stator winding; Holding circuit is connected on powerBetween inverter circuit and driving isolation circuit, motor is carried out to overcurrent protection; Power supply circuits are powered to sinusoidal drive device.
Described hall circuitboard is annular, is embedded in back end cover for motor, for detection of rotor-position; On hall circuitboard apart from the center of circle 2/3 halfOn the circumference at footpath place, the uniform linear Hall integrated circuit identical with motor winding number N, motor winding number N is 3～5, when motor turnsSub-magnet steel magnetic field is under sinusoidal wave distribution occasion, and each Hall integrated circuit outputs to micro-processing by the rotor sinusoidal signal sensing through interface circuitDevice processing.
Hall integrated circuit output signal is: rotor often circles, and each Hall integrated circuit output n number of pole-pairs cycle sine wave, by rotorElectrical angle is divided into 2 × N interval, and each interval is (180/N) °.
Described microprocessor is that offset of sinusoidal modulating wave carries out digit phase correction to the standard normalized of collection signal, compensation because of sensor withStator winding site error, is down to minimum by empty load of motor electric current, makes motor operate in peak efficiency, under the calculating of standard normalization compensation is usedFormula:
In formula, X is Hall integrated circuit output signal, and Z is output signal center zero point, and A is output signal peak value.
The formula that is calculated as follows of described rotor electrical angle:
θ＝(m-1)×(180/N)°+Φ
In formula, Φ is the phase angle of getting a segment standard signal of forward monotonic increase or negative sense monotone decreasing in each interval, and m is current interval.
θ is again the first winding stator modulating wave phase angle, θ+(M-1) × (360/N) ° be M (M=1,2 ..., N) winding statorModulating wave phase angle, each modulating wave and carrier wave are modulated, and generate N input as driving isolation circuit to SPWM ripple.
The driving isolation circuit of sinusoidal drive device of the present invention is made up of IR2136 integrated circuit and peripheral circuit; Holding circuit comprises R1 and C1The current foldback circuit that the delay circuit being composed in series and adjustable potentiometer R2 and sample resistance R4 compose in parallel; Power inversion circuit is by 2NN full-bridge of individual power device composition forms; From the N of microprocessor output, SPWM ripple is input to IR2136 integrated circuit, through the electricity of bootingRoad isolation is amplified, and produces N to gate drive signal independently, is used for driving 2N power switch pipe break-make, and DC bus-bar voltage is reverse intoPulse modulation voltage is powered to motor stator winding; Utilize the single spin-echo of every a pair of SPWM that dead band is set, by delay circuit, integrated circuitIR2136 arranges dead band, carries out dual dead band time setting, prevents the conducting simultaneously of power inversion circuit upper and lower bridge arm.
The present invention's beneficial effect is compared with prior art:
(1) the built-in motor body inner space that makes full use of of hall circuitboard, does not change motor length; Compare with encoder with rotary transformer,Circuit board very light in weight, the increase of motor overall weight is very little.
(2) mounting process is simple, adopts digital form compensation hall circuitboard that rear sensor and stator phase deviation are installed, by empty load of motor electricityStream is down to minimum, makes motor operate in peak efficiency.
(3) the each phase current of stator is sinusoidal variations, and torque and electric current have linear relationship, and iron loss is little, and motor torque fluctuation is little.
(4) electric machine rotation inertia is little, and fast, cost is low in start and stop response.
(5) carry out dual dead band time setting by microprocessor and driving isolation circuit, prevent the conducting simultaneously of power inversion circuit upper and lower bridge arm,For the reliable running of drive motors is given security.
Brief description of the drawings
Fig. 1 is sinusoidal drive device circuit structured flowchart of the present invention
Fig. 2 is built-in Hall circuit board scheme of installation of the present invention
Fig. 3 is drive circuit module and the power inversion circuit figure of an embodiment of the present invention
Detailed description of the invention
Below by specific embodiment, also the present invention is described in further detail by reference to the accompanying drawings.
As shown in Figure 1, the composition of sinusoidal drive device of the present invention comprises: microprocessor and interface circuit, power supply circuits, driving isolation electricityRoad, power inversion circuit and holding circuit part. Cable on cable on DC brushless motor body and sinusoidal drive device is coupled together,Form whole electric system.
As shown in Figure 2, annular hall circuitboard is arranged on motor internal by the present invention, is used for detection rotor position. Built-in annular Hall electricityThe linear Hall integrated circuit of road plate uniform and motor winding number N same number on the circumference of about 2/3 radius in the circuit board center of circle,The Hall integrated circuit number of the present invention's design is 3. Each Hall integrated circuit centrally connected power supply, output is used cable to draw from back end cover for motor.The external diameter of circuit board is consistent with back end cover for motor internal diameter, facilitates it to embed in rear end cap, ensures that by tight fit circuit board is reliably arranged on motorInner.
First magnetized according to sine in motor rotor magnetic steel magnetic field. The magnetic field of the Hall integrated circuit induction electromotor rotor magnet steel on hall circuitboard,The analog quantity sinusoidal signal of output 0.7～5V, this signal, through interface circuit, signal is implemented to level conversion and LPF becomes 0～3V'sSignal, then by microprocessor collection implementation criteria normalized, revise Sine Modulated wave phase, judge the current interval of living in of rotor, whenStandard signal amplitude A > 0 markers is designated as 1, A≤0 markers and is designated as 0, the each standard signal of three-winding motor and 6 interval corresponding passes when forwardBe: 101 (UVW) → interval 1,100 → interval 2,110 → interval 3,010 → interval 4,011 → interval 5,001 → interval 6. AdoptObtain the phase angle Φ of a segment standard signal of getting forward monotonic increase or negative sense monotone decreasing in each interval with look-up table, by calculating rotorElectrical angle θ obtains rotor position information, and then obtains the sinusoidal modulation wave of the each winding of stator. Each modulating wave and carrier modulation are generated to positive taut pulseWide modulating wave SPWM, as the input of driving isolation circuit.
As shown in Figure 3, the present embodiment has designed buffer circuit, power inversion circuit and the holding circuit of 3 winding electric machines.
Described driving isolation circuit is made up of IR2136 integrated circuit and peripheral circuit; Peripheral circuit is mainly by capacitor C 4, C5, C6 and two utmost pointsPipe D1, D2 and D3 composition boostrap circuit, power supply You Yi road is divided into 6 road independent current sources by boostrap circuit provides grid to drive to power deviceMoving voltage, for the impact to power supply and circuit of the voltage that prevents boostrap circuit, blocks isolation with 3 diodes on circuit.
Described holding circuit comprises that the overcurrent that the delay circuit that is composed in series by R1 and C1 and adjustable potentiometer R2 and sample resistance R4 compose in parallel protectsProtection circuit.
Described power inversion circuit forms 3 full-bridges by 6 power devices and forms. From the light-coupled isolation of 3 pairs of SPWM ripples processes of microprocessor outputAfter, input to IR2136 integrated circuit, utilize boostrap circuit principle to produce 3 pairs of independently gate drive signals, be used for driving 6 N raceway groovesMOSFET power switch pipe Q1～Q6. Utilize the single spin-echo of every a pair of SPWM that dead band is set; Again by delay circuit, integrated circuit IR2136Dead band is set; By dual Dead Time is set, prevent the conducting simultaneously of power inversion circuit upper and lower bridge arm, reduce harmonic components, weaken motorShake. Sample resistance R4 is used for detecting bus current, and adjustable potentiometer R2 is used for setting maximum allowed current continuously, when electric current exceedes permissionValue, IR2136 overcurrent protection, malfunction indicator lamp D7 is bright, and output becomes low level entirely, and motor power-off, through the time delay of R1 and C1 compositionCircuit time constant t or after overcurrent disappears, output recovers automatically, prevents that motor stator winding is not impacted by overcurrent, protection motor and outsideEquipment.
Microprocessor of the present invention adopts DSP, and its model all can with DSP2407 or DSP2812.
Claims (7)
1. a brshless DC motor sinusoidal drive device, is characterized in that: this sinusoidal drive device comprises: microprocessor andInterface circuit, power supply circuits, driving isolation circuit, power inversion circuit and holding circuit, described driving isolation circuit byIR2136 integrated circuit and peripheral circuit form, the output phase of driving isolation circuit input end and microprocessor and interface circuitConnect, interface circuit output is connected with power inversion circuit; Described power inversion circuit forms N entirely by 2N power deviceBridge; Be input to IR2136 integrated circuit from the N offset of sinusoidal pulse width modulated wave SPWM of microprocessor output, utilize boostrap circuitProduce N to gate drive signal independently, be used for driving 2N power switch pipe break-make, utilize the phase place of every a pair of SPWMDead band is set on the contrary; By delay circuit, integrated circuit IR2136, dead band is set again, by dual Dead Time is set, anti-Only power inversion circuit upper and lower bridge arm conducting simultaneously, power inversion circuit is connected with brshless DC motor, microprocessor and interfaceCircuit is connected with the hall circuitboard output in motor, gathers the cycle sinusoidal signal of Hall integrated circuit output, marksAccurate normalized, according to signal amplitude and correlation, judges working rotor interval, obtains rotor electrical angle; Again byThe each winding phase relation of stator calculates each winding modulating wave, generates Sine Pulse Width Modulation ripple export to driving with carrier modulationBuffer circuit, driving power inverter circuit is reverse into pulse modulation voltage by DC bus-bar voltage and powers to motor stator winding;Described holding circuit comprises delay circuit and adjustable potentiometer R2 and the sample resistance R4 that resistance R 1 and capacitor C 1 are composed in seriesThe current foldback circuit composing in parallel, holding circuit is connected between power inversion circuit and driving isolation circuit, and motor is carried outOvercurrent protection; Power supply circuits are powered to sinusoidal drive device.
2. brshless DC motor sinusoidal drive device according to claim 1, is characterized in that: described hall circuitboardFor annular, be embedded in back end cover for motor, for detection of rotor-position; On hall circuitboard apart from the circle of the center of circle 2/3 radiusZhou Shang, the uniform linear Hall integrated circuit identical with motor winding number N, each Hall integrated circuit is by the rotor sensingSinusoidal signal outputs to microprocessor processes through interface circuit.
3. brshless DC motor sinusoidal drive device according to claim 2, is characterized in that: Hall integrated circuit is defeatedGoing out signal is: rotor often circles, and each Hall integrated circuit output n number of pole-pairs cycle sine wave, draws rotor electrical angleBe divided into 2 × N interval, each interval is (180/N) °.
4. brshless DC motor sinusoidal drive device according to claim 2, is characterized in that: motor winding number NBe 3～5.
5. brshless DC motor sinusoidal drive device according to claim 1, is characterized in that: described microprocessor pairThe standard normalized of collection signal is that offset of sinusoidal modulating wave carries out digit phase correction, and compensation is because of sensor and stator windingSite error, the calculating following formula that carries out standard normalization compensation:
In formula, X is Hall integrated circuit output signal, and Z is output signal center zero point, and A is output signal peak value.
6. brshless DC motor sinusoidal drive device according to claim 1, is characterized in that: described rotor electrical angleThe formula that is calculated as follows:
θ＝(m-1)×(180/N)°+Φ
In formula, Φ is the phase angle of getting a segment standard signal of forward monotonic increase or negative sense monotone decreasing in each interval, mFor current interval.
7. brshless DC motor sinusoidal drive device according to claim 4, is characterized in that: M winding stator is adjustedThe formula that is calculated as follows at wave phase processed angle:
θM＝θ+(M-1)×(360/N)°M＝1、2、…、N-1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810078445.6A CN106342389B (en) | 2008-12-15 | 2008-12-15 | Brshless DC motor sinusoidal drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810078445.6A CN106342389B (en) | 2008-12-15 | 2008-12-15 | Brshless DC motor sinusoidal drive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106342389B true CN106342389B (en) | 2013-02-13 |
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ID=58357993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810078445.6A Expired - Fee Related CN106342389B (en) | 2008-12-15 | 2008-12-15 | Brshless DC motor sinusoidal drive device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106342389B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856387A (en) * | 2015-12-08 | 2017-06-16 | 重庆森坦科技有限公司 | A kind of driver for brushless DC motor |
| CN109698520A (en) * | 2019-02-01 | 2019-04-30 | 长兴博瑞能源有限公司 | A kind of photovoltaic power generation grid-connecting system |
-
2008
- 2008-12-15 CN CN200810078445.6A patent/CN106342389B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106856387A (en) * | 2015-12-08 | 2017-06-16 | 重庆森坦科技有限公司 | A kind of driver for brushless DC motor |
| CN109698520A (en) * | 2019-02-01 | 2019-04-30 | 长兴博瑞能源有限公司 | A kind of photovoltaic power generation grid-connecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR03 | Grant of secret patent right | ||
| GRSP | Grant of secret patent right | ||
| DC01 | Secret patent status has been lifted | ||
| DCSP | Declassification of secret patent | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20171215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |