CN107947647B - Three-phase brushless motor driving circuit and control method thereof - Google Patents
Three-phase brushless motor driving circuit and control method thereof Download PDFInfo
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- CN107947647B CN107947647B CN201711377546.9A CN201711377546A CN107947647B CN 107947647 B CN107947647 B CN 107947647B CN 201711377546 A CN201711377546 A CN 201711377546A CN 107947647 B CN107947647 B CN 107947647B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001939 inductive effect Effects 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000000819 phase cycle Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 3
- 238000003287 bathing Methods 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to a three-phase brushless motor driving circuit and a control method thereof, wherein an intelligent microprocessor of the driving circuit is electrically connected to an intelligent power module, the intelligent power module is electrically connected to three phase wires of a motor, the intelligent microprocessor is electrically connected to a wiring socket of a Hall sensor and is connected to a comparator module in parallel, and the other end of the comparator module is electrically connected to the three phase wires of the brushless motor; the intelligent microprocessor is electrically connected to the center tap of the potentiometer. When the potentiometer is rotated, the control method enables the motor to rotate through six different signal positions by electrifying the motor for six times, so that the actual motor position signal is detected and compared with the theoretical Hall position signal each time, the Hall is indicated as the same signal each time, and the circuit is automatically driven in a Hall mode; the actual motor position signal and the theoretical Hall position signal only need to be different once to indicate no Hall or Hall fault, and the circuit is automatically driven in a Hall-free mode.
Description
Technical Field
The invention relates to a motor driving circuit and control, in particular to a driving circuit for automatically identifying the presence or absence of a three-phase direct current brushless motor and a control method thereof.
Background
The three-phase direct current brushless motor driving is divided into a sensorless driving mode and a sensorless driving mode, the current driving circuit is applicable to either the sensorless brushless motor or the sensorless brushless motor, and the sensorless brushless motor cannot be automatically identified and respectively driven, so that the use limitation is caused.
Disclosure of Invention
The invention aims to provide a driving circuit capable of automatically identifying a motor with or without sense. It is another object of the present invention to provide a control method that does not require any line change or switching operation when driving both a sensorless and a sensorless motor.
The technical scheme of the invention is that the three-phase brushless motor driving circuit comprises an intelligent microprocessor, and is characterized in that the intelligent microprocessor is electrically connected to an intelligent power module, the intelligent power module is electrically connected to three phase lines of a motor, the intelligent microprocessor is electrically connected to a wiring socket of a Hall sensor and is connected to a comparator module in parallel, and the other end of the comparator module is electrically connected to the three phase lines of the brushless motor; the comparator module is independently powered, and the intelligent microprocessor is electrically connected to the middle tap of the potentiometer.
As preferable: the intelligent Microprocessor (MCU) is connected to the Intelligent Power Module (IPM) through six electric wires (AH, AL, BH, BL, CH, CL) so as to control the conduction sequence of the three-phase half bridge; an Intelligent Power Module (IPM) is connected to the brushless motor through three electric wires (U, V, W); the intelligent Microprocessor (MCU) is also connected to the terminals (JP) of the three Hall sensors by three electrical conductors (Ha, hb, hc) electrically connected to the output ports of the Comparator Module (CMP); three electrical conductors (U, V, W) are connected to the input ports of the Comparator Module (CMP); the speed regulating interface of the intelligent Microprocessor (MCU) is connected with the middle tap of an adjustable potentiometer (VR) through an electric lead (SW); the direct current power supply anode (5V) is connected with the power supply anode of the intelligent Microprocessor (MCU), the Intelligent Power Module (IPM), the Comparator Module (CMP), the wiring terminal (JP) of the Hall sensor and the adjustable potentiometer (VR); the direct current power supply negative electrode (AGND) is connected with an intelligent Microprocessor (MCU), an Intelligent Power Module (IPM), a Comparator Module (CMP), a wiring terminal (JP) of a Hall sensor and a power supply negative terminal of an adjustable potentiometer (VR); the positive pole (VCC) of the power supply is connected with the power supply input of the Intelligent Power Module (IPM), and the negative Pole (PGND) of the analog power supply is connected with the power supply ground of the Intelligent Power Module (IPM).
The other technical solution of the present invention is a control method of the three-phase brushless motor driving circuit, which is characterized by comprising the following steps:
when an adjustable potentiometer (VR) is rotated, an intelligent Microprocessor (MCU) detects a start speed regulating signal through a lead (SW), and a motor is ready to start;
the intelligent Microprocessor (MCU) sends set voltage and electrified phase sequence through six electric wires (AH, AL, BH, BL, CH, CL), so that the Intelligent Power Module (IPM) rotates the motor to a set position through the electric wires (U, V, W), and the intelligent Microprocessor (MCU) detects a position signal of the set position of the motor through a Hall sensor terminal (JP), and firstly the UW phase is electrified;
detecting ha=1, hb=1 and hc=0, starting operation in a non-inductive mode if the detection values are unequal, and carrying out VW communication if the detection values are equal;
detecting ha=0, hb=1 and hc=0, starting operation in a non-inductive mode if the ha=0, hb=1 and hc=0, and conducting VU communication if the ha=1, hb=0 and hc=0;
fifthly, detecting ha=0, hb=1 and hc=1, if the ha=0, hb=1, hc=hc, and Hc, starting operation in a non-inductive mode if ha=0, hb=hc, hc and Hc are communicated if Hc is equal;
detecting ha=0, hb=0 and hc=1, starting operation in a non-inductive mode if the ha=0, hb=0 and hc=1, and conducting WV communication if the ha=0, hb=1 and hc=1;
detecting ha=1, hb=0 and hc=1, starting operation in a non-inductive mode if the detection values are unequal, and carrying out UV communication if the detection values are equal;
detecting ha=1, hb=0 and hc=0, if they are not equal, starting operation in a non-inductive manner, and if they are equal, starting operation in an inductive manner.
As preferable: the step (c) further comprises:
(2.1) after UW is electrically connected, judging ha=1, hb=1 and hc=0 through delay;
as preferable: the steps further comprise:
(3.1) after VW is electrically connected, ha=0, hb=1, and hc=0 are determined by delay.
As preferable: the step c further comprises the following steps:
(4.1) after VU is electrically connected, ha=0, hb=1 and hc=1 are judged by delay.
As preferable: the step of step five further comprises:
(5.1) after WU is electrically connected, ha=0, hb=0, and hc=1 are determined by delay.
As preferable: the step further comprises:
(6.1) after WV is connected to electricity, ha=1 and hb=0 and hc=1 are judged by delay.
As preferable: the step of step d further comprises:
(7.1) after the UV is electrically connected, ha=1 and hb=0 and hc=0 are judged by delay.
As preferable: the comparison results of the step (2.1), the step (3.1), the step (4.1), the step (5.1), the step (6.1) and the step (7.1) are all equal, the operation is started in a Hall mode, and the operation is started in a Hall-free mode if the comparison result is not equal at any time.
Compared with the prior art, the invention has the beneficial effects that:
the method is used for detecting whether the brushless motor has the Hall sensors or not, the motor rotates six times only by six steps of power-on sequences, whether the brushless motor has the Hall sensors or not can be detected, whether the three Hall sensors have faults or not can be detected, and if no Hall sensor or the Hall sensor has faults, the circuit operates in a sensorless driving mode; if there is a hall sensor and none of the hall sensors fails, the circuit operates in a sensible drive mode.
Drawings
FIG. 1 is a block diagram of a driving circuit for automatically recognizing whether a three-phase DC brushless motor is sensed or not;
FIG. 2 is a schematic circuit diagram of FIG. 1;
fig. 3 is a flowchart of an embodiment of a control method of the three-phase brushless motor driving circuit of the invention.
Detailed Description
The invention will be further described in detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, the driving circuit for automatically identifying the sense of the three-phase brushless dc motor includes an intelligent Microprocessor (MCU) connected to an Intelligent Power Module (IPM) through six electrical wires (AH, AL, BH, BL, CH, CL) to control the turn-on sequence of the three-phase half bridge; an Intelligent Power Module (IPM) is connected to the brushless motor through three electric wires (U, V, W); the intelligent Microprocessor (MCU) is also connected to the wiring terminals (JP) of the three Hall sensors through three electric wires (Ha, hb, hc) which are electrically connected to the output ports of the Comparator Module (CMP); three electrical conductors (U, V, W) are connected to the input ports of the Comparator Module (CMP); the speed regulating interface of the intelligent Microprocessor (MCU) is connected with the middle tap of an adjustable potentiometer (VR) through an electric lead (SW); the direct current power supply anode (5V) is connected with the power supply anode of the intelligent Microprocessor (MCU), the Intelligent Power Module (IPM), the Comparator Module (CMP), the wiring terminal (JP) of the Hall sensor and the adjustable potentiometer (VR); the 5V direct current power supply negative electrode (AGND) is connected with an intelligent Microprocessor (MCU), an Intelligent Power Module (IPM), a Comparator Module (CMP), a wiring terminal (JP) of a Hall sensor and a power supply negative terminal of an adjustable potentiometer (VR); the positive pole (VCC) of the power supply is connected with the power supply input of the Intelligent Power Module (IPM), and the negative Pole (PGND) of the analog power supply is connected with the power supply ground of the Intelligent Power Module (IPM); the Comparator Modules (CMP) are independently powered.
Referring to fig. 3, the control method of the three-phase brushless motor driving circuit includes the following steps:
when an adjustable potentiometer (VR) is rotated, an intelligent Microprocessor (MCU) detects a start speed regulating signal through a lead (SW), and a motor is ready to start;
the intelligent Microprocessor (MCU) sends set voltage and electrified phase sequence through six electric wires (AH, AL, BH, BL, CH, CL), so that the Intelligent Power Module (IPM) rotates the motor to six set positions through the electric wires (U, V, W), and the intelligent Microprocessor (MCU) detects position signals of the six set positions of the motor through a Hall sensor terminal (JP), and firstly the UW phase is electrified;
detecting ha=1, hb=1 and hc=0, starting operation in a non-inductive mode if the detection values are unequal, and carrying out VW communication if the detection values are equal;
detecting ha=0, hb=1 and hc=0, starting operation in a non-inductive mode if the ha=0, hb=1 and hc=0, and conducting VU communication if the ha=1, hb=0 and hc=0;
fifthly, detecting ha=0, hb=1 and hc=1, if the ha=0, hb=1, hc=hc, and Hc, starting operation in a non-inductive mode if ha=0, hb=hc, hc and Hc are communicated if Hc is equal;
detecting ha=0, hb=0 and hc=1, starting operation in a non-inductive mode if the ha=0, hb=0 and hc=1, and conducting WV communication if the ha=0, hb=1 and hc=1;
detecting ha=1, hb=0 and hc=1, starting operation in a non-inductive mode if the detection values are unequal, and carrying out UV communication if the detection values are equal;
detecting ha=1, hb=0 and hc=0, if they are not equal, starting operation in a non-inductive manner, and if they are equal, starting operation in an inductive manner.
The detected six Hall position electric signals are correspondingly compared with six theoretical signals;
(2.1) after UW is electrically connected, judging ha=1, hb=1 and hc=0 through delay;
(3.1) after VW is electrically connected, judging ha=0, hb=1 and hc=0 through delay;
(4.1) after the VU is powered on, judging ha=0, hb=1 and hc=1 through delay;
(5.1) after WU is powered on, judging ha=0, hb=0 and hc=1 through delay;
(6.1) after WV is electrically connected, judging ha=1, hb=0 and hc=1 through delay;
(7.1) after the UV is powered on, judging ha=1, hb=0 and hc=0 through delay;
the comparison results of the steps (2.1), (3.1), (4.1), (5.1), (6.1) and (7.1) are all equal, the operation is started in a Hall mode, and the operation is started in a Hall-free mode if the comparison results are not equal at any time.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. The control method of the three-phase brushless motor driving circuit comprises an intelligent microprocessor MCU, wherein the intelligent microprocessor MCU is electrically connected to an intelligent power module IPM, the intelligent power module IPM is electrically connected to three phase wires of a motor, the intelligent microprocessor MCU is also connected to a wiring terminal JP of three Hall sensors through three electric wires Ha, hb and Hc, the three electric wires Ha, hb and Hc are electrically connected to output ports of a comparator module CMP, and the other end of the comparator module is electrically connected to the three phase wires of the brushless motor; the comparator module is independently powered, and the intelligent microprocessor MCU is electrically connected to a middle tap of the potentiometer VR; the method is characterized by comprising the following steps of:
when the adjustable potentiometer VR is rotated, the intelligent microprocessor MCU detects a start speed regulating signal through a lead SW, and the motor is ready to start;
the intelligent microprocessor MCU sends set voltage and electrified phase sequence through six electric wires AH, AL, BH, BL, CH, CL, so that the intelligent power module IPM enables the motor to rotate to a set position through the electric wires U, V, W, the intelligent microprocessor MCU detects a position signal of the set position of the motor through the Hall sensor terminal JP, and the UW phase is electrified first;
detecting ha=1, hb=1 and hc=0, starting operation in a non-inductive mode if the detection values are unequal, and carrying out VW communication if the detection values are equal;
detecting ha=0, hb=1 and hc=0, starting operation in a non-inductive mode if the ha=0, hb=1 and hc=0, and conducting VU communication if the ha=1, hb=0 and hc=0;
fifthly, detecting ha=0, hb=1 and hc=1, if the ha=0, hb=1, hc=hc, and Hc, starting operation in a non-inductive mode if ha=0, hb=hc, hc and Hc are communicated if Hc is equal;
detecting ha=0, hb=0 and hc=1, starting operation in a non-inductive mode if the ha=0, hb=0 and hc=1, and conducting WV communication if the ha=0, hb=1 and hc=1;
detecting ha=1, hb=0 and hc=1, starting operation in a non-inductive mode if the detection values are unequal, and carrying out UV communication if the detection values are equal;
detecting ha=1, hb=0 and hc=0, if they are not equal, starting operation in a non-inductive manner, and if they are equal, starting operation in an inductive manner.
2. The method of claim 1, wherein the step of:
(2.1) after UW is electrically connected, ha=1, hb=1, and hc=0 are determined by delay.
3. The method of claim 1, wherein the step of controlling the three-phase brushless motor driving circuit further comprises:
(3.1) after VW is electrically connected, ha=0, hb=1, and hc=0 are determined by delay.
4. The method of controlling a three-phase brushless motor driving circuit according to claim 1, wherein the steps further comprise:
(4.1) after VU is electrically connected, ha=0, hb=1 and hc=1 are judged by delay.
5. A control method of a three-phase brushless motor driving circuit according to claim 1, characterized in that the step of bathing further comprises:
(5.1) after WU is electrically connected, ha=0, hb=0, and hc=1 are determined by delay.
6. A control method of a three-phase brushless motor driving circuit according to claim 1, characterized in that said step of step id further comprises:
(6.1) after WV is connected to electricity, ha=1 and hb=0 and hc=1 are judged by delay.
7. The method of controlling a three-phase brushless motor driving circuit according to claim 1, wherein the step of, further comprises:
(7.1) after the UV is electrically connected, ha=1 and hb=0 and hc=0 are judged by delay.
8. The control method of a three-phase brushless motor driving circuit according to any one of claims 2 to 7, wherein the comparison results of the steps (2.1), (3.1), (4.1), (5.1), (6.1) and (7.1) are all equal, and the operation is started in a hall-free manner if the comparison results are not equal at any one time.
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| CN201711377546.9A CN107947647B (en) | 2017-12-19 | 2017-12-19 | Three-phase brushless motor driving circuit and control method thereof |
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| CN201711377546.9A CN107947647B (en) | 2017-12-19 | 2017-12-19 | Three-phase brushless motor driving circuit and control method thereof |
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| CN107947647B true CN107947647B (en) | 2024-03-12 |
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