CN210608972U - Low-voltage three-phase brushless direct current motor control circuit - Google Patents
Low-voltage three-phase brushless direct current motor control circuit Download PDFInfo
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- CN210608972U CN210608972U CN201921941461.3U CN201921941461U CN210608972U CN 210608972 U CN210608972 U CN 210608972U CN 201921941461 U CN201921941461 U CN 201921941461U CN 210608972 U CN210608972 U CN 210608972U
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Abstract
The utility model discloses a low pressure three-phase brushless DC motor control circuit belongs to motor control technical field, include: the overcurrent protection circuit comprises an overcurrent protection circuit, a microprocessor circuit, a power driving circuit, a position detection circuit, a voltage speed regulation circuit, a speed feedback circuit and a power circuit, wherein the voltage speed regulation circuit, the position detection circuit, the speed feedback circuit and the power driving circuit are electrically connected with the microprocessor circuit, the input end of the overcurrent protection circuit is electrically connected with the power driving circuit, and the output end of the overcurrent protection circuit is electrically connected with the microprocessor circuit. The output end of the power supply circuit is electrically connected with the microprocessor circuit, the power driving circuit, the position detection circuit and the voltage speed regulation circuit. The utility model discloses utilize TB67B054FTG chip to realize that three-phase brushless DC motor controls, control mode is simple, and is with low costs, easily realizes.
Description
Technical Field
The utility model belongs to the technical field of motor control, more specifically relates to a low pressure three-phase brushless direct current motor control circuit.
Background
The brushless DC motor performs electronic commutation according to the Hall position sensor instead of brush commutation of the brush DC motor, so that the brushless DC motor has the advantages of less maintenance, longer service life, high efficiency, high torque and the like. Therefore, the three-phase brushless dc motor has been widely used in the technical fields of numerical control machine tools, automobiles, home appliances, and the like.
However, the control circuit of the existing brushless dc motor generally has some neglected disadvantages: firstly, the control circuit is large in size and large in number of components, and high power density is difficult to realize; secondly, the control scheme is complex, and the research and development period is long.
SUMMERY OF THE UTILITY MODEL
To the above defect of prior art or improve the demand, the utility model provides a low pressure three-phase brushless DC motor control circuit solves the technical problem that the control circuit volume that current brushless DC motor control circuit exists is comparatively huge, components and parts are in large quantity, control scheme is comparatively complicated and the research and development cycle is longer etc. from this.
In order to achieve the above object, the utility model provides a low pressure three-phase brushless DC motor control circuit, include: the device comprises an overcurrent protection circuit, a microprocessor circuit, a power driving circuit, a position detection circuit, a voltage speed regulation circuit, a speed feedback circuit and a power circuit;
the output ends of the voltage speed regulating circuit, the position detection circuit and the overcurrent protection circuit are electrically connected with the microprocessor circuit;
the input ends of the power driving circuit and the rotating speed output circuit are electrically connected with the microprocessor circuit; the input end of the overcurrent protection circuit is electrically connected with the power driving circuit;
the voltage speed regulating circuit, the position detection circuit, the power driving circuit and the microprocessor circuit are respectively electrically connected with the power circuit.
Preferably, the voltage speed regulation circuit comprises a first resistor, a first capacitor and a second capacitor;
the first end of the first resistor is connected with the power supply circuit, and the second end of the first resistor is connected with the first ends of the first capacitor and the second capacitor;
the first end of the first capacitor is connected with the first end of the second capacitor and then is connected with the microprocessor circuit;
and the second end of the first capacitor is connected with the second end of the second capacitor and then grounded.
Preferably, the microprocessor circuit comprises a micro control unit and a peripheral circuit, and the micro control unit is a TB67B054FTG chip.
Preferably, the position detection circuit includes a first hall sensor, a second hall sensor, a third hall sensor, a second resistor, a third resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, and an eleventh capacitor;
the sixth capacitor is connected with the input end of the first Hall sensor in parallel;
the seventh capacitor is connected with the output end of the first Hall sensor in parallel;
the eighth capacitor is connected with the input end of the second Hall sensor in parallel;
the ninth capacitor is connected with the output end of the second Hall sensor in parallel;
the tenth capacitor is connected with the input end of the third Hall sensor in parallel;
the eleventh capacitor is connected with the output end of the third Hall sensor in parallel;
one end of the second resistor is connected in series with the first pins of the first Hall sensor, the second Hall sensor and the third Hall sensor;
one end of the third resistor is connected with the first Hall sensor, the second Hall sensor and a third pin of the third Hall sensor, and the other end of the third resistor is grounded.
Preferably, the speed feedback circuit comprises a sixth resistor, a seventh resistor, a thirteenth capacitor and an amplifier;
one end of the sixth resistor is electrically connected with the microprocessor circuit, and the other end of the sixth resistor is connected with the input end of the amplifier;
the thirteenth capacitor is connected with the output end of the amplifier in parallel;
the seventh resistor is connected in series with the thirteenth capacitor, and the common connection point of the seventh resistor and the thirteenth capacitor is connected with the output end of the amplifier.
Preferably, the power driving circuit comprises a power driving chip, a third capacitor, a fourth capacitor and a fifth capacitor;
the input end of the power driving chip is connected with the PWM signal output end of the microprocessor circuit;
the third capacitor, the fourth capacitor and the fifth capacitor are respectively connected with the three-phase output end of the power driving chip in parallel, and the common connection point of the three-phase output end of the power driving chip is connected with a three-phase winding U, V, W of the motor.
Preferably, the overcurrent protection circuit comprises a fourth resistor, a fifth resistor and a twelfth capacitor;
the fifth resistor is connected with the power driving circuit in series; one end of the fourth resistor is connected with the fifth resistor, the common connection point of the fourth resistor and the fifth resistor is connected to the power driving circuit, and the other end of the fourth resistor and the fifth resistor are connected to the microprocessor circuit; the twelfth capacitor is connected in series with the fourth resistor, and the common connection point of the twelfth capacitor and the fourth resistor is connected to the microprocessor circuit.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
1. because the utility model adopts the design of the double-sided printed circuit board, the compactness and miniaturization of the control circuit structure are realized; in addition, the size of a circuit board where the control circuit is located is further reduced by further using an overcurrent protection circuit, a microprocessor circuit and a power driving circuit which are highly integrated and have few components, so that the technical problem that the control circuit in the brushless direct current motor control circuit is large in size can be solved;
2. because the utility model discloses after the signal of well microprocessor circuit receipt voltage speed control circuit output, the rotor position information of cooperation position detection circuit feedback to control power drive circuit, including power drive circuit adopts drive chip and three-phase inverter circuit integrated mode, consequently can solve technical problem such as control circuit and control algorithm complicacy;
3. the utility model discloses control circuit's components and parts are small in quantity, reliability and sexual valence relative altitude.
Drawings
Fig. 1 is a block diagram of a control circuit of a low-voltage three-phase brushless dc motor according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a voltage regulation circuit and a power driving circuit provided by an embodiment of the present invention;
fig. 3 is a circuit diagram of a position detection circuit and an overcurrent protection circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a speed feedback circuit according to an embodiment of the present invention;
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-a power supply circuit; 2-a voltage speed regulation circuit; 3-a position detection circuit; 4-a microprocessor circuit; 5-a speed feedback circuit; 6-a power driving circuit; 7-overcurrent protection circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The utility model provides a three-phase brushless direct current motor control circuit based on TB67B054FTG chip solves the circuit volume that exists among the current brushless direct current motor control circuit comparatively huge, components and parts are more, control circuit is comparatively complicated, technical problem such as the interference problem is serious.
As shown in fig. 1, the utility model discloses a three-phase brushless dc motor control circuit based on TB67B054FTG chip includes: the device comprises a power supply circuit 1, a voltage speed regulation circuit 2, a position detection circuit 3, a microprocessor circuit 4, a speed feedback circuit 5, a power drive circuit 6 and an overcurrent protection circuit 7;
the output ends of the voltage speed regulating circuit 2, the position detection circuit 3 and the overcurrent protection circuit 7 are electrically connected with the microprocessor circuit 4; the input ends of the power driving circuit 6 and the speed feedback circuit 5 are electrically connected with the microprocessor circuit 4; the input end of the overcurrent protection circuit 7 is electrically connected with the power driving circuit 6; the voltage speed regulation circuit 2, the position detection circuit 3, the power drive circuit 6 and the microprocessor circuit 4 are respectively connected with the power circuit 1.
The power supply circuit 1 specifically includes a voltage stabilizing circuit and a plurality of filter circuits.
The microprocessor circuit 4 includes a micro control unit and a peripheral circuit; the micro control unit is specifically TB67B054FTG of Toshiba semiconductor.
As shown in fig. 2, the voltage regulation circuit 2 specifically includes a first resistor R1, a first capacitor C1, and a second capacitor C2; one end of the first resistor R1 is connected to the power circuit 1, and the other end is connected with the first capacitor C1; the first capacitor C1 is connected with the second capacitor C2 in parallel, one end of the common connection point of the first capacitor C1 and the second capacitor C2 is grounded, and the other end of the common connection point is connected to a VSP pin of the micro-control unit;
as shown in fig. 3, the position detection circuit 3 includes a first hall sensor H1, a second hall sensor H2, a third hall sensor H3, a third resistor R3, a second resistor R2, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, and an eleventh capacitor C11; the sixth capacitor C6 is connected in parallel with the input end of the first Hall sensor H1; the seventh capacitor C7 is connected in parallel with the output end of the first Hall sensor H1; the eighth capacitor C8 is connected in parallel with the input end of the second Hall sensor H2; the ninth capacitor C9 is connected in parallel with the output end of the second Hall sensor H2; the tenth capacitor C10 is connected in parallel with the input terminal of the third Hall sensor H3; the eleventh capacitor C11 is connected in parallel with the output end of the third Hall sensor H3;
as shown in fig. 2, the power driving circuit 6 is formed by integrating a driving chip and a three-phase inverter circuit (e.g., TPD4144AK), or may be formed by separately providing an independent driving chip and a three-phase inverter circuit. The power driving circuit 6 receives the PWM signal outputted from the micro control unit, so as to control the three-phase bridge inverter circuit built in the chip, and the built-in bootstrap circuit and the three external bootstrap capacitors are used to transmit the three-phase output voltage to the three-phase winding U, V, W of the motor. The three bootstrap capacitors are specifically a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5, which are respectively connected in parallel with the three-phase output end of the power driving chip, and the common connection point of the three bootstrap capacitors is connected to the three-phase winding U, V, W of the motor.
As shown in fig. 4, the speed feedback circuit 5 is an amplifying circuit, and specifically includes a sixth resistor R6, a seventh resistor R7, a thirteenth capacitor C13, and an amplifier Q1. One end of the sixth resistor R6 is electrically connected with a speed feedback pin of the microprocessor circuit, and the other end of the sixth resistor R6 is connected with the input end of the amplifier; a thirteenth capacitor C13 is connected in parallel with the amplifier input; the seventh resistor R7 is connected to the amplifier Q1, and the other end is connected to the output terminal.
As shown in fig. 3, the overcurrent protection circuit 7 includes a fourth resistor R4, a fifth resistor R5, and a twelfth capacitor C12, wherein the fifth resistor R5 is connected in series with the power driving circuit 6; one end of the fourth resistor R4 is connected with the fifth resistor R5, the common connection point of the fourth resistor R4 is connected with the power driving circuit 6, and the other end of the fourth resistor R4 is connected with the microprocessor circuit 4; a twelfth capacitor C12 is connected in series with the fourth resistor R4, the common connection of which is connected to the microprocessor circuit 4.
The working principle of the utility model is as follows:
firstly, the power circuit 1 obtains voltages of various grades from an external power supply, supplies power to various modules after voltage stabilization and filtering, and simultaneously transmits a voltage speed regulation signal to the microprocessor circuit 4; the position detection circuit 3 transmits the rotor position information of the motor to the microprocessor circuit 4, the microprocessor circuit 4 makes a corresponding control strategy according to the external voltage speed regulation signal and the current position information so as to control the power driving circuit 6, and meanwhile, the microprocessor circuit 4 outputs the rotating speed signal through the speed feedback circuit 5. In the whole working process of the control circuit, the overcurrent protection circuit 7 detects the output current of the power driving circuit 6 at any moment, once the overcurrent is detected, an alarm signal is transmitted to the microprocessor circuit 4, and then the microprocessor circuit 4 makes corresponding protection measures.
It should be noted that, according to the implementation requirement, each step/component described in the present application can be divided into more steps/components, and two or more steps/components or partial operations of the steps/components can be combined into new steps/components to achieve the purpose of the present invention.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A low-voltage three-phase brushless direct current motor control circuit, comprising: the device comprises an overcurrent protection circuit, a microprocessor circuit, a power driving circuit, a position detection circuit, a voltage speed regulation circuit, a speed feedback circuit and a power circuit;
the output ends of the voltage speed regulating circuit, the position detection circuit and the overcurrent protection circuit are electrically connected with the microprocessor circuit;
the input ends of the power driving circuit and the speed feedback circuit are electrically connected with the microprocessor circuit; the input end of the overcurrent protection circuit is electrically connected with the power driving circuit;
the voltage speed regulating circuit, the position detection circuit, the power driving circuit and the microprocessor circuit are respectively electrically connected with the power circuit.
2. The low-voltage three-phase brushless direct current motor control circuit according to claim 1, wherein the voltage regulation circuit comprises a first resistor, a first capacitor and a second capacitor;
the first end of the first resistor is connected with the power supply circuit, and the second end of the first resistor is connected with the first ends of the first capacitor and the second capacitor;
the first end of the first capacitor is connected with the first end of the second capacitor and then is connected with the microprocessor circuit;
and the second end of the first capacitor is connected with the second end of the second capacitor and then grounded.
3. The low-voltage three-phase brushless direct current motor control circuit according to claim 2, wherein the microprocessor circuit comprises a micro control unit and a peripheral circuit, and the micro control unit is a TB67B054FTG chip.
4. The low-voltage three-phase brushless direct current motor control circuit according to claim 1, wherein the position detection circuit comprises a first hall sensor, a second hall sensor, a third hall sensor, a second resistor, a third resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, and an eleventh capacitor;
the sixth capacitor is connected with the input end of the first Hall sensor in parallel;
the seventh capacitor is connected with the output end of the first Hall sensor in parallel;
the eighth capacitor is connected with the input end of the second Hall sensor in parallel;
the ninth capacitor is connected with the output end of the second Hall sensor in parallel;
the tenth capacitor is connected with the input end of the third Hall sensor in parallel;
the eleventh capacitor is connected with the output end of the third Hall sensor in parallel;
one end of the second resistor is connected in series with the first pins of the first Hall sensor, the second Hall sensor and the third Hall sensor;
one end of the third resistor is connected with the first Hall sensor, the second Hall sensor and a third pin of the third Hall sensor, and the other end of the third resistor is grounded.
5. The low voltage three phase brushless dc motor control circuit of claim 1, wherein the speed feedback circuit includes a sixth resistor, a seventh resistor, a thirteenth capacitor, and an amplifier;
one end of the sixth resistor is electrically connected with the microprocessor circuit, and the other end of the sixth resistor is connected with the input end of the amplifier;
the thirteenth capacitor is connected with the output end of the amplifier in parallel;
the seventh resistor is connected in series with the thirteenth capacitor, and the common connection point of the seventh resistor and the thirteenth capacitor is connected with the output end of the amplifier.
6. The low-voltage three-phase brushless direct current motor control circuit according to claim 1, wherein the power driving circuit comprises a power driving chip, a third capacitor, a fourth capacitor and a fifth capacitor;
the input end of the power driving chip is connected with the PWM signal output end of the microprocessor circuit;
the third capacitor, the fourth capacitor and the fifth capacitor are respectively connected with the three-phase output end of the power driving chip in parallel, and the common connection point of the three-phase output end of the power driving chip is connected with a three-phase winding U, V, W of the motor.
7. The low-voltage three-phase brushless direct current motor control circuit according to claim 1, wherein the overcurrent protection circuit comprises a fourth resistor, a fifth resistor, and a twelfth capacitor;
the fifth resistor is connected with the power driving circuit in series; one end of the fourth resistor is connected with the fifth resistor, the common connection point of the fourth resistor and the fifth resistor is connected to the power driving circuit, and the other end of the fourth resistor and the fifth resistor are connected to the microprocessor circuit; the twelfth capacitor is connected in series with the fourth resistor, and the common connection point of the twelfth capacitor and the fourth resistor is connected to the microprocessor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921941461.3U CN210608972U (en) | 2019-11-11 | 2019-11-11 | Low-voltage three-phase brushless direct current motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921941461.3U CN210608972U (en) | 2019-11-11 | 2019-11-11 | Low-voltage three-phase brushless direct current motor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210608972U true CN210608972U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921941461.3U Active CN210608972U (en) | 2019-11-11 | 2019-11-11 | Low-voltage three-phase brushless direct current motor control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210608972U (en) |
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2019
- 2019-11-11 CN CN201921941461.3U patent/CN210608972U/en active Active
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