CN115021623A - Lead angle self-adaptive compensation circuit and brushless direct current motor - Google Patents
Lead angle self-adaptive compensation circuit and brushless direct current motor Download PDFInfo
- Publication number
- CN115021623A CN115021623A CN202210798094.6A CN202210798094A CN115021623A CN 115021623 A CN115021623 A CN 115021623A CN 202210798094 A CN202210798094 A CN 202210798094A CN 115021623 A CN115021623 A CN 115021623A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit module
- motor
- current
- lead angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
-
- 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
-
- 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
-
- 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
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
- H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
-
- 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
- H02P6/28—Arrangements for controlling current
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a lead angle self-adaptive compensation circuit and a brushless direct current motor, wherein the lead angle self-adaptive compensation circuit comprises: the phase advance circuit module, the switch circuit module, the current sampling circuit module and the three-phase inverter circuit module are used for collecting current in the current sampling circuit module, converting and feeding the collected current back to the switch circuit module by the switch circuit module, adjusting the advance angle voltage by the conduction condition of the switch circuit module, automatically adjusting the angle difference between winding current and back electromotive force, improving the current waveform of a motor winding and obtaining smooth torque, and when the motor is used in various environments and various loads, changing the corresponding advance angle voltage along with the change of the load to ensure that the current of the motor and the back electromotive force are in phase and automatically adjust the phase angle, improve the noise generated in each rotating speed section of the motor and improve the efficiency of the motor; the brushless DC motor comprises a lead angle adaptive compensation circuit, based on which the motor is optimized in terms of efficiency in each speed segment.
Description
Technical Field
The invention relates to the technical field of direct current motor control, in particular to a lead angle self-adaptive compensation circuit and a brushless direct current motor.
Background
The brushless direct current motor has the characteristics of high energy efficiency, long service life, excellent control performance and the like, and is widely applied to various fields. The control scheme of the brushless direct current motor at the present stage can select a vector scheme with slightly high cost and better performance; and a special chip scheme with low cost and performance which is not much different from that of the vector can be selected. The special chip scheme is simple to apply and high in reliability, and can meet the development of small-power and most brushless direct current motors. The special chip is a brushless direct current motor controller which detects three-phase sine waves by a 120-degree rotor magnetic pole position, can realize sine wave PWM output of an SVM, has the characteristics of a working clock generator, an error amplifier, current guide phase correction and the like in the interior, and has protection of overvoltage, overheating, overcurrent, Hall signal abnormity and the like. The current guiding phase technology is particularly important, and mainly aims at compensating a current phase angle to directly influence the efficiency of the motor. Due to the inductance characteristic of the stator winding, the sine wave current actually flowing into the three-phase coil will lag behind the three-phase input voltage by an angle, so that the sine wave current cannot be in phase with the back electromotive force, and the output efficiency cannot be fully exerted. Therefore, different parameter matching is required according to different loads in the motor debugging process. In the existing design, because the lead angle voltage cannot be automatically adjusted, when the rotating speed and the load of the motor change, the noise of the motor is increased, and the working efficiency is reduced to a certain extent.
Disclosure of Invention
Therefore, in order to overcome the defect that the advance angle voltage in the prior art cannot be automatically adjusted, and the efficiency and the noise of the motor are reduced to a certain extent when the rotating speed and the load of the motor are changed, the advance angle self-adaptive compensation circuit and the brushless direct current motor are provided, the noise of the motor can be improved, the efficiency of the motor is improved, and the efficiency of the motor is optimized at each rotating speed section.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a lead angle self-adaptive compensation circuit, comprising: phase advance circuit module, switch circuit module, current sampling circuit module and three-phase inverter circuit module, wherein:
the phase advance circuit module is respectively connected with the external power supply and the switch circuit module, and is used for processing and keeping the input advance angle voltage within a preset voltage range and outputting an advance angle signal corresponding to the voltage to the brushless direct current motor through the three-phase inverter circuit module;
the current sampling circuit module is used for sampling winding current when the brushless direct current motor runs and feeding the winding current back to the switch circuit module;
the switch circuit module is also connected with an external power supply, determines the conduction state of the switch circuit module according to the voltage input by the external power supply and the voltage corresponding to the current collected by the current sampling circuit module, and adjusts the lead angle voltage when the switch circuit module is in the conduction state, so that the phase lead circuit module adjusts and adjusts the corresponding lead angle.
In one embodiment, the switching circuit module includes: triode, current-limiting resistor, variable resistance, wherein:
the emitter of the triode is connected with an external power supply, and the base of the triode is connected with a current-limiting resistor;
and the variable resistor is respectively connected with the collector of the triode and the phase advance circuit module and used for changing the resistance value of the variable resistor and adjusting the advance angle voltage when the triode is switched on.
In one embodiment, the phase advancing circuit module includes: first divider resistance and second divider resistance, zener diode, filter capacitor and phase angle processing chip, wherein:
one end of the first divider resistor is connected with the output end of the analog input voltage chip, the other end of the first divider resistor is connected with the second divider resistor in series, the other end of the second divider resistor is grounded, the voltage stabilizing diode is connected with two ends of the second divider resistor in parallel, the filter capacitor is connected with two ends of the voltage stabilizing diode in parallel, the variable resistor is connected between the voltage stabilizing diode and the filter capacitor, and the phase angle processing chip is connected with two ends of the filter capacitor in parallel.
In one embodiment, the phase angle processing chip includes: the third voltage dividing resistor is connected to two ends of the filter capacitor in parallel, one end of the fourth voltage dividing resistor is connected with the third voltage dividing resistor in parallel, the other end of the fourth voltage dividing resistor is connected with the input end of the comparator, the output end of the comparator is connected with the three-phase inverter circuit module, and negative voltage electrodes of the third voltage dividing resistor and the comparator are all grounded.
In one embodiment, after the input voltage of the external power supply is divided by the first voltage dividing resistor and the second voltage dividing resistor, the output voltage is a lead angle voltage;
when the voltage input value of the external power supply is greater than or equal to a first threshold value and less than or equal to a second threshold value, the motor is started, the current of a motor winding is at a non-rated rotating speed, if the voltage interval meets the conduction condition of a triode, the variable resistor is adjusted to adjust the lead angle voltage, and the phase lead circuit module adjusts and adjusts the corresponding lead angle; and if the triode conduction condition is not met, the lead angle voltage value is unchanged.
In an embodiment, when the voltage input value of the external power supply is greater than the second threshold and less than or equal to the third threshold, the motor is started and the current of the motor winding is at the rated speed, and if the voltage interval meets the conduction condition of the triode, the variable resistor is adjusted to adjust the lead angle voltage, and the phase advancing circuit module adjusts the corresponding lead angle.
In one embodiment, the regulated voltage value of the zener diode is not greater than the maximum voltage input value of the external power supply.
In one embodiment, the variable resistor is a thermistor with a negative temperature coefficient, and when the temperature of the direct current motor rises and the waveform of the output current is distorted during operation, the thermistor senses that the internal temperature of the motor rises and the resistance value is correspondingly reduced.
In one embodiment, the variable resistor is a variable resistor, and the resistance value of the variable resistor is manually adjusted when the output current waveform is distorted during the operation of the direct current motor.
The embodiment of the invention also provides a brushless direct current motor which comprises the lead angle adaptive compensation circuit of any one of the embodiments.
The technical scheme of the invention has the following advantages:
1. the lead angle self-adaptive compensation circuit provided by the embodiment of the invention comprises a phase lead circuit module, a switch circuit module, a current sampling circuit module and a three-phase inverter circuit module, by collecting the current in the current sampling circuit module, the switch circuit module converts and feeds back the collected current to the switch circuit module, the lead angle voltage is adjusted by the conduction condition of the switch circuit module, thereby automatically adjusting the angle difference between the winding current and the counter electromotive force, improving the current waveform of the motor winding, obtaining smooth torque, when the motor is used in various environments and various loads, the corresponding lead angle voltage can be changed along with the change of the loads, so that the current of the motor is in phase with the counter electromotive force, the phase angle is automatically adjusted, the noise of each rotating speed section of the motor is improved, the efficiency of the motor is improved, and the efficiency of the motor in each rotating speed section is optimal.
2. The brushless direct current motor provided by the embodiment of the invention comprises the lead angle self-adaptive compensation circuit, so that the noise of the motor can be improved, the efficiency of the motor can be improved, and the efficiency of the motor is optimal in each rotating speed section.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a connection diagram of functional blocks of the lead angle adaptive compensation circuit provided in the embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of a lead angle adaptive compensation circuit according to the present invention;
FIG. 3 is a schematic diagram illustrating a relationship between an input voltage and a duty ratio of an external power source according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of lead angle voltage and phase relationships provided in an embodiment of the present invention;
FIG. 5 is a waveform of winding current at a rated speed provided in an embodiment of the present invention;
fig. 6 is a waveform diagram of the current at the non-rated rotation speed before the compensation provided in the embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Due to the inductance characteristic of the stator winding of the brushless direct current motor, the sine wave current actually flowing into the three-phase coil will lag behind the three-phase input voltage by an angle, so that the sine wave current cannot be in phase with the back electromotive force, and the output efficiency cannot be fully exerted. In the previous design, because the lead angle voltage cannot be automatically adjusted, when the rotating speed and the load of the motor change, the generated noise is high, and the efficiency of the motor is reduced.
Based on the above problem, the present invention provides a lead angle adaptive compensation circuit, as shown in fig. 1, including: phase advance circuit module, switch circuit module, current sampling circuit module and three-phase inverter circuit module, wherein:
the phase advance circuit module is respectively connected with the external power supply and the switch circuit module, and is used for processing and keeping the input advance angle voltage within a preset voltage range and outputting an advance angle signal corresponding to the voltage to the brushless direct current motor through the three-phase inverter circuit module; the current sampling circuit module is used for sampling winding current when the brushless direct current motor runs and transmitting the winding current to the switch circuit module; the switch circuit module is also connected with an external power supply, determines the conduction state of the switch circuit module according to the voltage input by the external power supply and the voltage corresponding to the current collected by the current sampling circuit module, and adjusts the lead angle voltage when the switch circuit module is in the conduction state, so that the phase lead circuit module adjusts the corresponding lead angle.
The lead angle self-adaptive compensation circuit provided by the embodiment of the invention can change the corresponding lead angle voltage along with the change of the load, so that the phase lead circuit module adjusts and adjusts the corresponding lead angle, the current of the motor is in phase with the counter electromotive force, the phase angle is automatically adjusted, the noise generated in each rotating speed section of the motor is improved, the efficiency of the motor is improved, and the efficiency of the motor in each rotating speed section is optimal.
IN one embodiment, as shown IN fig. 2, VSP _ IN is an analog input voltage chip, which is an analog voltage for controlling the rotation of the motor by an external power supply, and the output duty ratio is controlled by the input voltage VSP _ IN, and the relationship between VSP _ IN and the duty ratio is shown IN fig. 3. The embodiment of the invention defines the range of the input analog voltage to be 2.1V-VSP _ IN-5.5V, which is only taken as an example and not limited to this, and IN practical application, the input analog voltage is determined according to the voltage requirement required by the motor and the specification of the chip.
As shown in fig. 2, the switching circuit module in this embodiment includes: PNP triode Q1, current-limiting resistor R2, variable resistor R1, wherein: the emitter of the triode is connected with an external power supply, and the base of the triode is connected with a current-limiting resistor; and the variable resistor R1 is respectively connected with the collector of the triode and the phase lead circuit module and is used for changing the resistance value of the triode and adjusting the lead angle voltage when the triode is switched on. In other embodiments, a multi-way switch device with a voltage comparator may be provided instead of the transistor, which is merely an example and not a limitation.
In one embodiment, the variable resistor is a thermistor with a negative temperature coefficient, when the temperature of the direct current motor rises and the waveform of the output current is distorted in the operation process, the noise is increased, the resistance value is added and reduced when the thermistor senses that the internal temperature of the motor rises, the voltage at the AS is increased, and the distorted current waveform is automatically adjusted to enable the motor to be in the optimal operation.
In another embodiment, the variable resistor is a variable resistor, and the variable resistor needs to be manually adjusted according to actual use conditions. The value of the variable resistor is determined according to the sine degree of the current, and if the variable resistor is adjusted, the sine degree of the current is high, the efficiency is optimal, and no noise exists, the variable resistor value at the moment is the determined value.
As shown in fig. 2, the phase advancing circuit module includes: first divider resistance RL1 and second divider resistance RL2, zener diode Z1, filter capacitor C1 and phase angle processing chip, wherein: one end of a first voltage dividing resistor RL1 is connected with the output end of an analog input voltage chip VSP _ IN, the other end of the first voltage dividing resistor RL1 is connected with a second voltage dividing resistor RL2 IN series, the second voltage dividing resistor RL2 and the other end of the first voltage dividing resistor RL1 are grounded, a voltage stabilizing diode Z1 is connected with two ends of the second voltage dividing resistor RL2 IN parallel, a filter capacitor C1 is connected with two ends of a voltage stabilizing diode Z1 IN parallel, a variable resistor R2 is connected between the voltage stabilizing diode R1 and the filter capacitor C1, and a phase angle processing chip is connected with two ends of the filter capacitor IN parallel. It should be noted that the regulated voltage value of the zener diode is not greater than the maximum voltage input value of the analog input voltage chip.
As shown in fig. 2, the phase angle processing chip includes: third divider resistance R3, fourth divider resistance R4 and comparator U1, third divider resistance R3 parallel connection is in filter capacitor C1 both ends, and fourth divider resistance R4 one end and third divider resistance R3 parallel connection, the other end is connected with the input of comparator U1, the output and the three-phase inverter of comparator are connected, and third divider resistance R3 and comparator U1 negative voltage pole all ground connection. The phase angle processing chip is used for correspondingly converting the input front angle voltage into a front angle signal based on the corresponding relation between the voltage and the angle in the phase angle processing chip, so that the motor is always in an optimal running state.
IN the embodiment of the present invention, after the input voltage of the analog input voltage chip VSP _ IN is divided by the first voltage dividing resistor RL1 and the second voltage dividing resistor RL2, AS shown IN fig. 2, the voltage output by AS is the lead angle voltage U AS The lead angle adaptive compensation circuit works according to the following principle:
when the voltage input value of the analog input voltage chip is smaller than a first threshold value, the motor is not started; when the voltage input value of the analog input voltage chip is greater than or equal to a first threshold and less than or equal to a second threshold, the motor is started, the current of a motor winding is under the non-rated rotating speed, if the voltage interval meets the triode conduction condition, the variable resistor is adjusted to adjust the lead angle voltage, and the phase lead circuit module adjusts the corresponding lead angle, so that the current output waveform of the direct current motor is close to sine; and if the triode conduction condition is not met, the lead angle voltage value is unchanged. When the input value of the analog input voltage chip is greater than the second threshold and less than or equal to the third threshold, if the voltage interval meets the conduction condition of the triode, the variable resistor is adjusted to adjust the lead angle voltage, and the phase lead circuit module adjusts the corresponding lead angle.
IN one embodiment, when the VSP _ IN input voltage value is less than 2.1V, no duty cycle is output, and if the start requirement is not met, the motor is not operated. When the input voltage value of VSP _ IN is more than or equal to 2.1V and less than or equal to 2.5V, the motor is started, the rotating speed of the motor is increased along with the increase of the input voltage value of VSP _ IN, and the voltage output after the input voltage of VSP _ IN is divided by the voltage dividing resistors RL1 and RL2 is U AS Since VSP _ IN input voltage is small, U AS Outputting smaller voltage after voltage division. U shape AS Filtering by a capacitor C1, dividing voltage by resistors R3 and R4, entering a comparator U1, and processing the processed U1 AS Voltage signals flow into the three-phase inverter circuit module and are finally applied to a motor winding, and the output torque of the motor is reduced due to relatively low rotating speed; when the motor is running throughThe current sampling circuit module detects a winding current I, and simultaneously, because of the inductance characteristic of the stator winding, the sine wave current actually flowing into the three-phase coil lags behind the three-phase input voltage by an angle, so that the sine wave current cannot be in phase with the back electromotive force, and the output efficiency cannot be fully exerted. The current I flows through a resistor R2 to enter the base of a PNP triode Q1, the base voltage of the triode is detected if Ub is more than Ue and Ub is more than Uc, the triode is in saturated conduction, and U is conducted along with the conduction of the triode Q1 AS And then increases, and synchronously feeds the increased voltage back to a subsequent circuit (namely, a component included in a circuit behind the transistor Q1) along with U AS The voltage is increased, the angle of lagging corresponding to the motor current and the counter electromotive force is reduced, the waveform of the motor winding current is close to sine under the non-rated rotating speed, and smooth torque is output. The efficiency is improved, the temperature rise is reduced, the synchronous noise is improved, and if the base voltage of the triode does not meet the conduction condition, the U value is increased AS The voltage is unchanged.
When the input voltage value of VSP _ IN is more than or equal to 2.6 and less than or equal to 5.5V, the voltage U at AS AS The voltage is divided by voltage dividing resistors RL1 and RL2 to be increased, interference voltage is filtered by a capacitor C1, and the interference voltage is converted by voltage dividing resistors R3, R4 and U1 and then applied to a motor winding. At this time, the VSP _ IN voltage is increased, the duty ratio of the input winding voltage is increased, the output torque of the motor is increased, when the VSP _ IN voltage is increased to the rated rotation speed, the waveform of the motor current is a sine wave, the waveform is smooth, no distortion occurs, as shown IN fig. 4, and at this time, noise and temperature rise are both IN the optimal states. When the VSP _ IN voltage is increased again, the rotating speed of the motor is increased, the inductance blocking effect is increased, the included angle between the current and the counter electromotive force is increased, and the required lead angle voltage U is increased AS Becomes large, U since VSP _ IN voltage reaches a maximum value AS The voltage at the position is not changed, but the current waveform of the motor winding is affected by inductance and is distorted, as shown in fig. 5, the required included angle between the current and the counter electromotive force is larger, the output power of the motor is increased, the current is increased, noise is generated, and the internal temperature of the motor is increased. At the moment, the current sampling circuit module enables the collected current to enter the base electrode of the triode through the current limiting resistor R2, and if the triode is switched on, the resistor R1 is adjusted to enable the U to be turned on AS At a voltageThe current waveform is sinusoidal, the purpose of automatically adjusting the lead angle is achieved, and the motor is always in an optimal running state.
The lead angle self-adaptive compensation circuit provided by the invention has the advantages that the current in the current sampling circuit module is collected, the collected current is fed back to the voltage of the base electrode of the triode, and the lead angle voltage is improved through the conduction condition of the triode, so that the angle difference between the winding current and the back electromotive force is automatically adjusted, the current waveform of the motor winding is improved, and smooth torque is obtained.
The embodiment of the invention also provides a brushless direct current motor, which comprises the lead angle adaptive compensation circuit described in any one of the above embodiments. Based on the lead angle self-adaptive compensation circuit, the current waveform of the winding of the brushless direct current motor can be improved, smooth torque can be obtained, motor noise can be improved, motor efficiency can be improved, and the efficiency of the motor can be optimized in each rotating speed section.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. An advance angle adaptive compensation circuit, comprising: phase advance circuit module, switch circuit module, current sampling circuit module and three-phase inverter circuit module, wherein:
the phase advance circuit module is respectively connected with the external power supply and the switch circuit module, and is used for processing and keeping the input advance angle voltage within a preset voltage range and outputting an advance angle signal corresponding to the voltage to the brushless direct current motor through the three-phase inverter circuit module;
the current sampling circuit module is used for sampling winding current when the brushless direct current motor runs and transmitting the winding current to the switching circuit module;
the switch circuit module is also connected with an external power supply, determines the conduction state of the switch circuit module according to the voltage input by the external power supply and the voltage corresponding to the current collected by the current sampling circuit module, and adjusts the lead angle voltage when the switch circuit module is in the conduction state, so that the phase lead circuit module adjusts the corresponding lead angle.
2. The lead angle adaptive compensation circuit of claim 1, wherein the switching circuit module comprises: triode, current-limiting resistor, variable resistance, wherein:
the emitter of the triode is connected with an external power supply, and the base of the triode is connected with a current-limiting resistor;
and the variable resistor is respectively connected with the collector of the triode and the phase advance circuit module and used for changing the resistance value of the variable resistor and adjusting the advance angle voltage when the triode is switched on.
3. The adaptive lead angle compensation circuit of claim 2, wherein the phase lead circuit block comprises: first divider resistance and second divider resistance, zener diode, filter capacitor and phase angle processing chip, wherein:
one end of the first divider resistor is connected with the output end of the analog input voltage chip, the other end of the first divider resistor is connected with the second divider resistor in series, the other end of the second divider resistor is grounded, the voltage stabilizing diode is connected with two ends of the second divider resistor in parallel, the filter capacitor is connected with two ends of the voltage stabilizing diode in parallel, the variable resistor is connected between the voltage stabilizing diode and the filter capacitor, and the phase angle processing chip is connected with two ends of the filter capacitor in parallel.
4. The lead angle adaptive compensation circuit of claim 3, wherein the phase angle processing chip comprises: the third voltage dividing resistor is connected to two ends of the filter capacitor in parallel, one end of the fourth voltage dividing resistor is connected with the third voltage dividing resistor in parallel, the other end of the fourth voltage dividing resistor is connected with the input end of the comparator, the output end of the comparator is connected with the three-phase inverter circuit module, and the negative voltage electrodes of the third voltage dividing resistor and the comparator are all grounded.
5. The lead angle adaptive compensation circuit of claim 3, wherein an input voltage of an external power supply is divided by a first voltage dividing resistor and a second voltage dividing resistor, and then the output voltage is a lead angle voltage;
when the voltage input value of the external power supply is greater than or equal to a first threshold value and less than or equal to a second threshold value, the motor is started, the current of a motor winding is at a non-rated rotating speed, if the voltage interval meets the conduction condition of a triode, the variable resistor is adjusted to adjust the lead angle voltage, and the phase lead circuit module adjusts and adjusts the corresponding lead angle; and if the triode conduction condition is not met, the lead angle voltage value is unchanged.
6. The lead angle adaptive compensation circuit of claim 5,
when the voltage input value of the external power supply is greater than the second threshold and less than or equal to the third threshold, the motor is started, the current of a motor winding is at a rated rotating speed, and if the voltage interval meets the conduction condition of the triode, the variable resistor is adjusted to adjust the lead angle voltage, and the corresponding lead angle is correspondingly adjusted.
7. The adaptive lead angle compensation circuit of claim 3, wherein the regulated voltage value of the Zener diode is not greater than the maximum voltage input value of an external power source.
8. The adaptive lead angle compensation circuit according to claim 2, wherein the variable resistor is a negative temperature coefficient thermistor, and when the temperature of the dc motor increases and the waveform of the output current is distorted during operation, the thermistor senses that the internal temperature of the motor increases and the resistance value decreases accordingly.
9. The lead angle adaptive compensation circuit of claim 2, wherein the variable resistor is a variable resistor, and the resistance value of the variable resistor is manually adjusted when the waveform of the output current is distorted during the operation of the dc motor.
10. A brushless dc motor comprising the lead angle adaptive compensation circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210798094.6A CN115021623A (en) | 2022-07-06 | 2022-07-06 | Lead angle self-adaptive compensation circuit and brushless direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210798094.6A CN115021623A (en) | 2022-07-06 | 2022-07-06 | Lead angle self-adaptive compensation circuit and brushless direct current motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115021623A true CN115021623A (en) | 2022-09-06 |
Family
ID=83079471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210798094.6A Pending CN115021623A (en) | 2022-07-06 | 2022-07-06 | Lead angle self-adaptive compensation circuit and brushless direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115021623A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582032A (en) * | 2023-07-12 | 2023-08-11 | 晶艺半导体有限公司 | Commutation control circuit with lead angle, motor system and commutation control method |
-
2022
- 2022-07-06 CN CN202210798094.6A patent/CN115021623A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582032A (en) * | 2023-07-12 | 2023-08-11 | 晶艺半导体有限公司 | Commutation control circuit with lead angle, motor system and commutation control method |
| CN116582032B (en) * | 2023-07-12 | 2023-09-15 | 晶艺半导体有限公司 | Commutation control circuit with lead angle, motor system and commutation control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8912744B2 (en) | Method and apparatus for dynamically adjusting a dead time of brushless direct current motor during a phase change | |
| CN104579020A (en) | Startup control method and startup control system for PG speed regulating motor | |
| WO2023087905A1 (en) | Compensation circuit for collecting phase delay of switch hall sensor, and control method thereof | |
| CN115021623A (en) | Lead angle self-adaptive compensation circuit and brushless direct current motor | |
| CN113992075B (en) | Compensation circuit and control method for phase delay of brushless direct current motor | |
| TW201136139A (en) | Speed-control circuits and constant-speed control circuits for BLDC motors | |
| CN203675011U (en) | Starting control system for PG speed adjustable motor | |
| CN203289362U (en) | Control device for brushless motor | |
| CN204836005U (en) | Brushless DC motor does not have position sensor driver chip and system | |
| CN215267623U (en) | Overcurrent protection circuit of three-phase brushless direct current motor | |
| CN105634341A (en) | Device and method of phase compensation of counter electromotive force zero crossing point detection of brushless direct current motor | |
| CN112398384B (en) | Control device for direct current motor | |
| CN111585479A (en) | Three-phase sensorless brushless direct current motor control system | |
| CN114826036A (en) | Brushless direct current motor control method capable of reducing phase-change torque pulsation | |
| CN113241731A (en) | Overcurrent protection circuit of three-phase brushless direct current motor | |
| CN108322127A (en) | Electric motor fan and air flow property adjustment equipment | |
| CN108494311B (en) | Motor phase current peak eliminating method controlled by current source inverter | |
| CN103618487B (en) | The electromotive force closed loop series-wound motor variable voltage control control method that exciting voltage controls | |
| CN117674644B (en) | Two-wire speed-regulating DC brushless motor and control circuit and control method thereof | |
| JP3173677B2 (en) | Inverter controlled generator | |
| CN110311614B (en) | Control method for inhibiting torque pulsation of switched reluctance motor | |
| CN104410335A (en) | Control circuit and control method of intelligent small-power motor controller | |
| CN220254384U (en) | Speed regulating device of AC motor and fan | |
| CN109286351B (en) | Current-limiting automatic regulator for motor | |
| CN211630100U (en) | Motor start control circuit and electrical equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |