CN210444203U - Three-phase motor drive circuit - Google Patents
Three-phase motor drive circuit Download PDFInfo
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- CN210444203U CN210444203U CN201921536952.XU CN201921536952U CN210444203U CN 210444203 U CN210444203 U CN 210444203U CN 201921536952 U CN201921536952 U CN 201921536952U CN 210444203 U CN210444203 U CN 210444203U
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Abstract
The utility model discloses a three-phase motor driving circuit, which comprises a first driving circuit, a second driving circuit and a third driving circuit, wherein the first driving circuit is connected with a motor to provide a first driving signal for the motor; the second driving circuit is connected with the motor to provide a second driving signal for the motor; the third driving circuit is connected with the motor to provide a third driving signal for the motor, and the motor is driven to rotate by the first driving signal, the second driving signal and the third driving signal. The whole motor driving circuit has the advantages of relatively simple structure, small volume and relatively high reliability.
Description
Technical Field
The utility model relates to the technical field of electric machines, especially, relate to a three-phase motor drive circuit.
Background
Brushless dc motors have been widely used in industrial control, automation, and other fields. The brushless direct current motor driving circuit has the advantages of simple structure, high reliability, long service life and the like, is widely used in small electric vehicles, is relatively complex in control structure, and is large in size and low in reliability due to the fact that a plurality of driving circuit components are formed by the separating elements.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the present invention is to provide a three-phase motor driving circuit.
In order to achieve the above object, according to the present invention, a three-phase motor driving circuit includes:
the driving circuit comprises a first driving circuit, a second driving circuit and a third driving circuit, wherein the first driving circuit is connected with a motor to provide a first driving signal for the motor; the second driving circuit is connected with the motor to provide a second driving signal for the motor; the third driving circuit is connected with the motor to provide a third driving signal for the motor, and the motor is driven to rotate by the first driving signal, the second driving signal and the third driving signal.
Further, according to an embodiment of the present invention, the first driving circuit includes:
the first transistor driving circuit is connected with the control circuit;
the first-phase motor driving circuit is respectively connected with the first transistor driving circuit and the motor so as to output the first driving signal under the action of the first transistor driving circuit;
the second drive circuit includes: the second transistor driving circuit is connected with the control circuit;
the second-phase motor driving circuit is respectively connected with the second transistor driving circuit and the motor so as to output the second driving signal under the action of the second transistor driving circuit;
the third drive circuit includes: the third transistor driving circuit and the third phase motor driving circuit are connected with the control circuit;
the third phase motor driving circuit is respectively connected with the third transistor driving circuit and the third phase motor driving circuit, so as to output the third driving signal under the action of the third transistor driving circuit.
Further, according to an embodiment of the present invention, the first transistor driving circuit includes a transistor driver U7 and a first peripheral circuit, the input terminals of the transistor driver U7 are respectively connected to the control circuit, and the upper transistor output terminal (HO) and the lower transistor output terminal (LO) of the transistor driver U7 are respectively connected to the first signal terminal of the three-phase motor;
the first motor driving circuit comprises a MOS transistor Q3 and a MOS transistor Q4, wherein the gate of the MOS transistor Q3 is connected with the lower transistor output end (LO) of the transistor driver U7, the source of the MOS transistor Q3 is connected with the reference ground, the drain of the MOS transistor Q3 is connected with the source of the MOS transistor Q4, the drain of the MOS transistor Q4 is connected with the output power supply (VIN) of the battery, the gate of the MOS transistor Q4 is connected with the upper transistor output end (HO) of the transistor driver U7, and the drain of the MOS transistor Q3 is further connected with the first signal end of the three-phase motor.
Further, according to the utility model discloses an embodiment, three-phase motor drive circuit still includes motor fault detection circuit, motor fault detection circuit with drive circuit connects, and is right fault detection is carried out to the motor.
Further, according to an embodiment of the present invention, the motor failure detection circuit includes a first failure detection circuit and a second failure detection circuit, the first failure detection circuit is connected to the first driving circuit to perform failure detection on the motor through the first driving circuit;
the second fault detection circuit is connected with the second drive circuit so as to detect faults of the motor through the second drive circuit.
Further, according to an embodiment of the present invention, the first fault detection circuit includes: the negative input end of the integrated operational amplifier U9A is connected with one ends of the resistor R43, the resistor R36 and the resistor R38, the other end of the resistor R43 is connected with a power supply (+33V), the other end of the resistor R36 is connected with a reference ground, the other end of the resistor R38 is connected with the output end of the integrated operational amplifier U9A, the positive input end of the integrated operational amplifier U9A is connected with one end of the resistor R39, the other end of the resistor R39 is connected with the first driving circuit, and the output end of the integrated operational amplifier U9A is connected with the control circuit.
Further, according to the utility model discloses an embodiment, three-phase motor drive circuit still includes motor hall circuit, motor hall circuit with motor and control circuit connect, with will the hall signal conversion of motor output stabilizes the hall motor signal and exports extremely master control circuit.
Further, according to an embodiment of the present invention, the motor hall circuit includes a capacitor C31, a capacitor C32, a capacitor C26, and a capacitor C33, one end of the capacitor C31 is connected to the first hall signal end output by the motor, and the other end of the capacitor C31 is connected to ground;
one end of the capacitor C32 is connected with a second Hall signal end output by the motor, and the other end of the capacitor C32 is connected with reference ground;
one end of the capacitor C26 is connected with a third Hall signal end output by the motor, and the other end of the capacitor C26 is connected with the reference ground;
one end of the capacitor C33 is connected with a fourth Hall signal end output by the motor, and the other end of the capacitor C33 is connected with reference ground.
Further, according to the utility model discloses an embodiment, three-phase motor drive circuit still includes motor interface circuit, drive circuit passes through motor interface circuit with the motor is connected.
The embodiment of the utility model provides a three-phase motor drive circuit provides first drive signal for the motor through first drive circuit; the second driving circuit provides a second driving signal for the motor; the third driving circuit provides a third driving signal for the motor and drives the motor to rotate through the first driving signal, the second driving signal and the third driving signal, and the whole motor driving circuit is relatively simple in structure, small in size and relatively high in reliability.
Drawings
Fig. 1 is a block diagram of a three-phase motor driving circuit according to the present invention;
fig. 2 is a diagram of a first driving circuit, a second driving circuit and a third driving circuit provided in the present invention;
FIG. 3 is a circuit diagram of a motor fault detection circuit according to the present invention;
FIG. 4 is a Hall circuit diagram of a motor according to the present invention;
fig. 5 is a circuit diagram of a motor interface provided in the present invention.
Reference numerals:
a first drive circuit 10;
a first-phase motor drive circuit 101;
a first transistor drive circuit 102;
a second drive circuit 20;
a second phase motor drive circuit 201;
a second transistor drive circuit 202;
a third drive circuit 30;
a third phase motor drive circuit 301;
the third transistor drive circuit 302;
a motor 40;
a motor failure detection circuit 50;
a first failure detection circuit 501;
a second fault detection circuit 502;
a motor interface circuit 60;
a hall circuit 70;
an external control circuit 80.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
Detailed Description
In order to make the technical field person understand the scheme of the present invention better, the following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical scheme in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, an embodiment of the present invention provides a three-phase motor driving circuit, including: the driving circuit comprises a first driving circuit 10, a second driving circuit 20 and a third driving circuit 30, wherein the first driving circuit 10 is connected with a motor 40 to provide a first driving signal for the motor 40; as shown in fig. 1, the first driving circuit 10 is respectively connected to the main control circuit and the motor 40 to convert the first phase control signal output by the active circuit into a first driving signal, and drive the motor 40120 to rotate angularly by the first driving signal.
The second driving circuit 20 is connected with the motor 40 to provide a second driving signal for the motor 40; the second driving circuit 20 is connected to the main control circuit and the motor 40, respectively, so as to convert the second phase control signal output by the active circuit into a second driving signal, and drive the motor 40120 to rotate in an angle through the second driving signal.
The third driving circuit 30 is connected to the motor 40 to provide a third driving signal for the motor 40, and drives the motor 40 to rotate according to the first driving signal, the second driving signal and the third driving signal. The third driving circuit 30 is connected to the main control circuit and the motor 40, respectively, so as to convert the third phase control signal output by the active circuit into a third driving signal, and drive the motor 40120 to rotate by the third driving signal.
The embodiment of the present invention provides a first driving signal for the motor 40 through the first driving circuit 10; the second driving circuit 20 provides a second driving signal for the motor 40; the third driving circuit 30 provides a third driving signal for the motor 40, and drives the motor 40 to rotate through the first driving signal, the second driving signal and the third driving signal, and the driving circuit of the whole motor 40 has a relatively simple structure, a small volume and relatively high reliability.
Referring to fig. 1 and 2, the first driving circuit 10 includes: a first transistor drive circuit 102 and a first phase motor drive circuit 101, the first transistor drive circuit 102 being connected to the control circuit; as shown in fig. 2, the first transistor driving circuit 102 is connected to the main control circuit through a PB14 signal line and a PA9 signal, respectively, to receive the first phase motor 40 driving control signal output by the main control motor 40, and convert the first phase motor 40 driving control signal into a first phase transistor driving signal, and output the first phase transistor driving signal to the first motor 40 driving circuit, so as to drive the transistors in the first motor 40 driving circuit.
The first phase motor driving circuit 101 is respectively connected with the first transistor driving circuit 102 and the motor 40, so as to output a first driving signal under the action of the first transistor driving circuit 102; as shown in fig. 2, the first phase motor driving circuit 101 is respectively connected to the output power VIN and the ground reference GND1 to control the output of the power VIN under the action of the first transistor driving circuit 102, so as to provide the first phase driving power signal to the motor 40.
The second drive circuit 20 includes: a second transistor drive circuit 202 and a second phase motor drive circuit 201, the second transistor drive circuit 202 being connected to the control circuit; as shown in fig. 2, the second transistor driving circuit 202 is connected to the main control circuit through a PB13 signal line and a PA8 signal, respectively, to receive the second phase motor 40 driving control signal output by the main control motor 40, and convert the second phase motor 40 driving control signal into a second phase transistor driving signal, and output the second phase transistor driving signal to the second motor 40 driving circuit, so as to drive the transistors on the second motor 40 driving circuit.
The second phase motor driving circuit 201 is respectively connected with the second transistor driving circuit 202 and the motor 40, so as to output a second driving signal under the action of the second transistor driving circuit 202; as shown in fig. 2, the second phase motor driving circuit 201 is connected to the output power VIN and the ground reference GND1 respectively, so as to control the output of the power VIN under the action of the second transistor driving circuit 202, thereby providing a second phase driving power signal to the motor 40.
The third drive circuit 30 includes: the third transistor driving circuit 302 and the third phase motor driving circuit 301 the third transistor driving circuit 302 is connected with the control circuit; as shown in fig. 2, the third transistor driving circuit 302 is connected to the main control circuit through a PB15 signal line and a PA10 signal, respectively, to receive the third phase motor 40 driving control signal output by the main control motor 40, and convert the third phase motor 40 driving control signal into a third phase transistor driving signal, and output the third phase transistor driving signal to the third motor 40 driving circuit, so as to drive the transistors on the third motor 40 driving circuit.
The third phase motor driving circuit 301 is connected to the third transistor driving circuit 302 and the third phase motor driving circuit 301, respectively, so as to output a third driving signal under the action of the third transistor driving circuit 302. As shown in fig. 2, the third phase motor driving circuit 301 is respectively connected to the output power VIN and the ground reference GND1 to control the output of the power VIN under the action of the third transistor driving circuit 302, so as to provide a third phase driving power signal for the motor 40.
Referring to fig. 2, the first transistor driving circuit 102 includes a transistor driver U7 and a first peripheral circuit, wherein the input terminals of the transistor driver U7 are respectively connected to the control circuit, and the upper transistor output terminal HO and the lower transistor output terminal LO of the transistor driver U7 are respectively connected to the first signal terminal of the three-phase motor 40; as shown in fig. 2, the driving control signal output from the main control circuit may be converted into a driving signal of a MOS transistor by the transistor driver U7 to drive the MOS transistor on the driving circuit of the first motor 40.
Since the driving circuit of the first motor 40 includes the MOS transistor Q3 and the MOS transistor Q4, the gate of the MOS transistor Q3 is connected to the lower transistor output LO of the transistor driver U7, the source of the MOS transistor Q3 is connected to the ground, the drain of the MOS transistor Q3 is connected to the source of the MOS transistor Q4, the drain of the MOS transistor Q4 is connected to the output power VIN of the battery, the gate of the MOS transistor Q4 is connected to the upper transistor output HO of the transistor driver U7, and the drain of the MOS transistor Q3 is further connected to the first signal terminal of the three-phase motor 40.
Because the embodiment of the utility model provides an in, first motor 40 drive circuit adopts half-bridge drive mode, and half-bridge drive mode is through two MOS transistor output motor 40 drive signal. The MOS transistor Q4 needs to be driven at a higher level to be turned on stably because it is connected to the power source VIN, and the MOS transistor Q3 is connected to the ground GND1, and the MOS transistor Q3 needs to be turned on stably only at a lower level. The high voltage MOS transistor driving signal HO and the low voltage MOS transistor driving signal LO may be outputted through the transistor driver to drive the MOS transistors Q4 and Q3 to be turned on or off, and the third phase driving power signal may be outputted for the motor 40 through the MOS transistors Q1 and Q4 to be turned on or off, thereby driving the motor 40 to rotate.
Similarly, as shown in fig. 2, the circuit structures, functions and operating principles of the second transistor driving circuit 202 and the third transistor driving circuit 302 are the same as those of the first transistor driving circuit 102, and are not repeated herein.
Referring to fig. 1 and 3, the three-phase motor driving circuit further includes a motor failure detection circuit 50, and the motor failure detection circuit 50 is connected to the driving circuit to detect a failure of the motor 40. As shown in fig. 1 and fig. 3, by collecting the driving voltage values on the driving circuits respectively through the fault detection circuit, it can be obtained whether the motor 40 is in a fault state. For example, when the motor failure detection circuit 50 detects that the output voltage value of the drive circuit is in the normal low voltage state, the motor 40 may already be in the short-circuit failure state.
Referring to fig. 2 and 3, the motor failure detection circuit 50 includes a first failure detection circuit 501 and a second failure detection circuit 502, and the first failure detection circuit 501 is connected to the first drive circuit 10 to perform failure detection on the motor 40 through the first drive circuit 10; as shown in fig. 3, the fault acquisition end of the first fault detection circuit 501 is connected to the first driving circuit 10 through a VS signal, so as to detect a voltage value of the driving signal of the first motor 40 output by the first driving circuit 10, and output the detected voltage value to the main control circuit after processing. To indicate a fault via the master control circuit.
The second failure detection circuit 502 is connected to the second drive circuit 20 to perform failure detection of the motor 40 by the second drive circuit 20. As shown in fig. 3, the fault acquisition end of the second fault detection circuit 502 is connected to the second driving circuit 20 through a VS1 signal, so as to detect a voltage value of the driving signal of the second motor 40 output by the second driving circuit 20, and output the detected voltage value to the main control circuit after processing. To indicate a fault via the master control circuit. The two phase driving output nodes of the driving circuit can be subjected to fault information acquisition through the two fault detection circuits. The reliability of fault detection is improved, and the fault is prevented from being indicated by the master control circuit.
Referring to fig. 3, the first fault detection circuit 501 includes: the integrated operational amplifier U9A, a resistor R43, a resistor R36, a resistor R38 and a resistor R39, the negative input end of the integrated operational amplifier U9A is connected with one ends of a resistor R43, a resistor R36 and a resistor R38, the other end of the resistor R43 is connected with +33V of a power supply, the other end of the resistor R36 is connected with a reference ground, the other end of the resistor R38 is connected with the output end of the integrated operational amplifier U9A, the positive input end of the integrated operational amplifier U9A is connected with one end of the resistor R39, the other end of the resistor R39 is connected with the first driving circuit 10, and the output end of the integrated operational amplifier U9A is connected with the control circuit. The integrated operational amplifier U9A, the resistor R43, the resistor R36, the resistor R38 and the resistor R39 form a proportional amplifier circuit to isolate and output the detection voltage at the detection point of the first driving circuit 10, and output the voltage at the detection point of the first driving circuit 10 after conditioning, so that the master control circuit can better read a fault signal of the motor 40.
Referring to fig. 1 and 4, the three-phase motor driving circuit further includes a hall circuit 70 of the motor 40, and the hall circuit 70 of the motor 40 is connected to the motor 40 and the control circuit to convert the hall signal output by the motor 40 into a stable hall motor 40 signal and output the stable hall motor 40 signal to the main control circuit. The hall circuit 70 is connected with the motor 40 through the motor 40 to read the rotation angle signal of the motor 40, and output the angle signal to the main control circuit after processing the angle signal, so that the main control circuit can accurately obtain the rotation angle signal of the motor 40.
Referring to fig. 4, the hall circuit 70 of the motor 40 includes a capacitor C31, a capacitor C32, a capacitor C26, and a capacitor C33, wherein one end of the capacitor C31 is connected to the first hall signal end output by the motor 40, and the other end of the capacitor C31 is connected to ground; as shown in fig. 4, the capacitors C31 are respectively connected to the first hall signal line and the reference ground, so as to filter out the high-frequency interference signal or the electrostatic signal on the first hall signal line, and prevent the high-frequency interference signal or the electrostatic signal from entering the main control circuit, so as to prevent the main control circuit from being interfered or damaged, and enable the main control circuit to correctly read the hall signal output by the motor 40.
One end of the capacitor C32 is connected with the second Hall signal end output by the motor 40, and the other end of the capacitor C32 is connected with the reference ground; similarly, as shown in fig. 4, the capacitor C32 is connected to the second hall signal line and the reference ground, so as to filter the high-frequency interference signal or the electrostatic signal on the second hall signal line, and prevent the high-frequency interference signal or the electrostatic signal from entering the main control circuit, so as to avoid interfering or damaging the main control circuit, and enable the main control circuit to correctly read the hall signal output by the motor 40.
One end of the capacitor C26 is connected with the third Hall signal end output by the motor 40, and the other end of the capacitor C26 is connected with the reference ground; similarly, as shown in fig. 4, the capacitor C26 is connected to the third hall signal line and the reference ground, so as to filter the high-frequency interference signal or the electrostatic signal on the third hall signal line, and prevent the high-frequency interference signal or the electrostatic signal from entering the main control circuit, so as to avoid interfering or damaging the main control circuit, and enable the main control circuit to correctly read the hall signal output by the motor 40.
One end of the capacitor C33 is connected to the fourth hall signal output by the motor 40, and the other end of the capacitor C33 is connected to ground. Similarly, as shown in fig. 4, the capacitors C33 are respectively connected to the fourth hall signal line and the reference ground, so as to filter the high-frequency interference signal or the electrostatic signal on the fourth hall signal line, and prevent the high-frequency interference signal or the electrostatic signal from entering the main control circuit, so as to avoid interfering or damaging the main control circuit, and enable the main control circuit to correctly read the hall signal output by the motor 40.
Referring to fig. 1 and 5, the three-phase motor driving circuit further includes a motor interface circuit 60, and the driving circuit is connected to the motor 40 through the motor interface circuit 60. As shown in fig. 5, there are three motor interface circuits 60, and the three motor interface circuits 60 are connected to the motor 40 driving signal output terminals of the first phase motor driving circuit 101, the second phase motor driving circuit 201, and the third phase motor driving circuit 301 through VS, VS1, and VS2 terminals, respectively, so as to output the driving signal of the three phase motor 40 to the motor 40 through the motor 40 interface, thereby driving the motor 40.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent replacements may be made for some of the technical features of the embodiments. All utilize the equivalent structure that the content of the utility model discloses a specification and attached drawing was done, direct or indirect application is in other relevant technical field, all is in the same way the utility model discloses within the patent protection scope.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (9)
1. A three-phase motor drive circuit, comprising: the driving circuit comprises a first driving circuit, a second driving circuit and a third driving circuit, wherein the first driving circuit is connected with a motor to provide a first driving signal for the motor; the second driving circuit is connected with the motor to provide a second driving signal for the motor; the third driving circuit is connected with the motor to provide a third driving signal for the motor, and the motor is driven to rotate by the first driving signal, the second driving signal and the third driving signal.
2. The three-phase motor drive circuit according to claim 1, wherein the first drive circuit comprises:
the first transistor driving circuit is connected with the control circuit;
the first-phase motor driving circuit is respectively connected with the first transistor driving circuit and the motor so as to output the first driving signal under the action of the first transistor driving circuit;
the second drive circuit includes: the second transistor driving circuit is connected with the control circuit;
the second-phase motor driving circuit is respectively connected with the second transistor driving circuit and the motor so as to output the second driving signal under the action of the second transistor driving circuit;
the third drive circuit includes: the third transistor driving circuit and the third phase motor driving circuit are connected with the control circuit;
the third phase motor driving circuit is respectively connected with the third transistor driving circuit and the third phase motor driving circuit, so as to output the third driving signal under the action of the third transistor driving circuit.
3. The three-phase motor driving circuit according to claim 2, wherein the first transistor driving circuit comprises a transistor driver (U7) and a first peripheral circuit, the input terminals of the transistor driver (U7) are respectively connected with the control circuit, and the upper transistor output terminal and the lower transistor output terminal of the transistor driver (U7) are respectively connected with the first signal terminal of the three-phase motor;
the first motor driving circuit comprises a MOS transistor (Q3) and a MOS transistor (Q4), the grid electrode of the MOS transistor (Q3) is connected with the lower transistor output end of the transistor driver (U7), the source electrode of the MOS transistor (Q3) is connected with a reference ground, the drain electrode of the MOS transistor (Q3) is connected with the source electrode of the MOS transistor (Q4), the drain electrode of the MOS transistor (Q4) is connected with the output power supply of the battery, the grid electrode of the MOS transistor (Q4) is connected with the upper transistor output end of the transistor driver (U7), and the drain electrode of the MOS transistor (Q3) is further connected with the first signal end of the three-phase motor.
4. The three-phase motor drive circuit according to claim 1, further comprising a motor fault detection circuit connected to the drive circuit for fault detection of the motor.
5. The three-phase motor drive circuit according to claim 4, wherein the motor failure detection circuit includes a first failure detection circuit and a second failure detection circuit, the first failure detection circuit being connected to the first drive circuit to perform failure detection of the motor by the first drive circuit;
the second fault detection circuit is connected with the second drive circuit so as to detect faults of the motor through the second drive circuit.
6. The three-phase motor drive circuit according to claim 5, wherein the first fault detection circuit comprises: the circuit comprises an integrated operational amplifier (U9A), a resistor (R43), a resistor (R36), a resistor (R38) and a resistor (R39), wherein a negative input end of the integrated operational amplifier (U9A) is connected with one ends of the resistor (R43), the resistor (R36) and the resistor (R38), the other end of the resistor (R43) is connected with a power supply, the other end of the resistor (R36) is connected with a reference ground, the other end of the resistor (R38) is connected with an output end of the integrated operational amplifier (U9A), a positive input end of the integrated operational amplifier (U9A) is connected with one end of the resistor (R39), the other end of the resistor (R39) is connected with the first driving circuit, and an output end of the integrated operational amplifier (U9A) is connected with a control circuit.
7. The three-phase motor driving circuit according to claim 2, further comprising a motor hall circuit connected to the motor and the control circuit to convert a hall signal output from the motor into a stable hall motor signal and output the stable hall motor signal to the main control circuit.
8. The three-phase motor driving circuit according to claim 7, wherein the motor Hall circuit comprises a capacitor (C31), a capacitor (C32), a capacitor (C26) and a capacitor (C33), one end of the capacitor (C31) is connected with the first Hall signal end of the motor output, and the other end of the capacitor (C31) is connected with reference to ground;
one end of the capacitor (C32) is connected with a second Hall signal end output by the motor, and the other end of the capacitor (C32) is connected with reference ground;
one end of the capacitor (C26) is connected with a third Hall signal end output by the motor, and the other end of the capacitor (C26) is connected with reference ground;
one end of the capacitor (C33) is connected with the fourth Hall signal end output by the motor, and the other end of the capacitor (C33) is connected with reference ground.
9. The three-phase motor drive circuit of claim 1 further comprising a motor interface circuit, said drive circuit being connected to said motor through said motor interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921536952.XU CN210444203U (en) | 2019-09-16 | 2019-09-16 | Three-phase motor drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921536952.XU CN210444203U (en) | 2019-09-16 | 2019-09-16 | Three-phase motor drive circuit |
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| CN210444203U true CN210444203U (en) | 2020-05-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300545A (en) * | 2021-03-30 | 2021-08-24 | 深圳市世宗自动化设备有限公司 | Matching circuit of motor driver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113300545A (en) * | 2021-03-30 | 2021-08-24 | 深圳市世宗自动化设备有限公司 | Matching circuit of motor driver |
| CN113300545B (en) * | 2021-03-30 | 2022-09-06 | 深圳市世宗自动化设备有限公司 | Matching circuit of motor driver |
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