CN214544008U - Built-in driver and built-in driver circuit of motor - Google Patents

Abstract

The utility model discloses a built-in driver of motor and built-in driver circuit, wherein the driver circuit includes master control circuit and connects master control circuit's drive circuit respectively, overflow detection circuitry, three-phase hall sensor circuit, output function signal circuit, undervoltage protection circuit and excess temperature protection circuit, three-phase bridge circuit is still connected to drive circuit, three-phase bridge circuit still connects and overflows detection circuitry, driver circuit still includes a step-down circuit, step-down circuit with input voltage VCC step-down for 12V output voltage and 5V output voltage provide operating voltage for other circuits. The utility model provides a driver circuit simple structure, the interference killing feature is stronger, and positive reversal, speed governing, brake of steerable motor moreover, open and stop etc. and control function is abundanter, and has overvoltage, under-voltage, overflow, excess temperature, stifled commentaries on classics, hall to the motor and lack protect function such as looks, has improved the security that the motor used.

Description

Built-in driver and built-in driver circuit of motor

Technical Field

The utility model relates to a motor drive technical field, concretely relates to built-in driver of motor and built-in driver circuit.

Background

The motor built-in driver is a driver which is built in the motor and used for driving the motor to work or changing the working state of the motor. The circuit structure of the existing motor built-in driver is usually too complex, the anti-interference capability is poor, the controllable motor has limited functions, and the performances of overvoltage, undervoltage, overcurrent, overtemperature protection and the like of the motor are poor, so that the market application requirements can not be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a built-in driver of motor and built-in driver circuit, driver circuit simple structure in the driver, the interference killing feature is stronger, and positive reversal, speed governing, brake of steerable motor are opened and is stopped etc. moreover, and control function is abundanter, and has overvoltage, under-voltage, overflow, excess temperature, stifled commentaries on classics, hall to the motor and lack protect function such as looks for the motor uses safelyr.

To achieve the purpose, the utility model adopts the following technical proposal:

the driver circuit comprises a master control circuit and a driving circuit, an overcurrent detection circuit, a three-phase Hall sensor circuit, an output function signal circuit, an undervoltage protection circuit and an overtemperature protection circuit which are respectively connected with the master control circuit, wherein the driving circuit is further connected with a three-phase bridge circuit, the three-phase bridge circuit is further connected with the overcurrent detection circuit, the driver circuit further comprises a voltage reduction circuit, and the voltage reduction circuit reduces the voltage of input voltage VCC into 12V output voltage and 5V output voltage to provide working voltage for other circuits.

Preferably, the main control circuit includes a main control chip U4, a resistor R29, a capacitor C14, a capacitor C15, and a capacitor C16, a first pin of the main control chip U4 is connected in series with the resistor R29, then connected to the 5V voltage output end of the step-down circuit, and connected to the capacitor C16, and then grounded; a second pin, a third pin, an eighth pin, a ninth pin, a seventeenth pin, twenty-first to twenty-third pins and twenty-fifth pin of the main control chip U4 are suspended;

the fourth pin of the main control chip U4 is grounded, the capacitor C14 is connected between the fifth pin and the fourth pin, the capacitor C15 is connected between the sixth pin and the fourth pin, and the sixth pin of the main control chip U4 is connected with the 5V voltage output end of the voltage reduction circuit.

Preferably, the driving circuit comprises a driving chip U3, diodes D2, D3 and D4, and capacitors C11, C12, C5 and C9, wherein a first pin, a second pin and a third pin of the driving chip U3 are respectively connected with an eighteenth pin, a nineteenth pin and a twentieth pin of the main control chip U4;

the fourth pin, the fifth pin and the sixth pin of the driving chip U3 are respectively connected with the sixteenth pin, the fifteenth pin and the fourteenth pin of the main control chip U4;

a seventh pin of the driving chip U3 is connected with a 12V voltage output end of the voltage reduction circuit, an eighth pin of the driving chip U3 is grounded, and the capacitor C11 is connected between the seventh pin and the eighth pin of the driving chip U3;

ninth to eleventh pins and thirteenth, sixteenth and nineteenth pins of the driving chip U3 are respectively connected to corresponding input ports of the three-phase bridge circuit;

a twelfth pin, a fifteenth pin and an eighteenth pin of the driving chip U3 are respectively connected to corresponding output ports of the three-phase bridge circuit;

the capacitor C12 is connected between the twelfth pin and the fourteenth pin of the driving chip U3; a fourteenth pin of the driving chip U3 is connected with the inverted diode D4 and then connected with a 12V voltage output end of the voltage reduction circuit;

the capacitor C9 is connected between the fifteenth pin and the seventeenth pin of the driving chip U3; a seventeenth pin of the driving chip U3 is connected with the inverted diode D3 and then connected with a 12V voltage output end of the voltage reduction circuit;

the capacitor C5 is connected between the eighteenth pin and the twentieth pin of the driving chip U3; the twentieth pin of the driving chip U3 is connected with the diode D2 in the reverse direction and then connected with the 12V voltage output end of the voltage reduction circuit.

Preferably, the three-phase bridge circuit comprises double N tubes M1, M2 and M3, resistors R18, R21, R26, R28, R31, R33 and RS1, a fifth port and a sixth port of the double N tube M1 are connected with a first port of the double N tube after being short-circuited, and the short-circuited fifth port and the short-circuited sixth port are connected with an eighteenth pin of the driving chip U3; a seventh port and an eighth port of the double N-tube M1 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M1 is connected in series with the resistor R18 and then connected to a nineteenth pin of the driving chip U3, and a fourth port is connected in series with the resistor R21 and then connected to an eleventh pin of the driving chip U3; the third port of the double N tube M1 is connected to the third ports of the double N tube M2 and the double N tube M3 at the same time;

a fifth port and a sixth port of the double N-tube M2 are connected with the first port after being short-circuited, and the short-circuited fifth port and the short-circuited sixth port are connected to a fifteenth pin of the driving chip U3; a seventh port and an eighth port of the double N-tube M2 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M2 is connected in series with the resistor R26 and then connected to a sixteenth pin of the driver chip U3, and a fourth port is connected in series with the resistor R28 and then connected to a tenth pin of the driver chip U3;

the fifth port and the sixth port of the double N-tube M3 are connected with the first port after short circuit, and the short-circuited fifth port and sixth port are connected to the twelfth pin of the drive chip U3; a seventh port and an eighth port of the double N-tube M3 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M3 is connected in series with the resistor R31 and then connected to a thirteenth pin of the driving chip U3, and a fourth port is connected in series with the resistor R33 and then connected to a ninth pin of the driving chip U3;

one end of the resistor RS1 is connected with the third port of the double-N tube M3, and the other end of the resistor RS1 is grounded.

Preferably, the over-current detection circuit comprises a comparator IC1, resistors R35, R2, R3, R5 and a capacitor C18, and a third port of the comparator IC1 is connected in series with the resistor R35 and then connected to a third port of the double N-tube M3; the fourth port of the comparator IC1 is connected in series with the resistor R5 and then grounded; a fifth port of the comparator IC1 is connected with a 5V voltage output end of the voltage reduction circuit, and a second port is grounded; the first port of the comparator IC1 is serially connected with the resistor R2 and the capacitor C18 in sequence and then grounded, and the resistor R3 is serially connected between the first port and the fourth port of the comparator IC 1; and a node CURR in the over-current detection circuit is connected with a thirteenth pin of the main control chip U4.

Preferably, the three-phase hall sensor circuit comprises hall sensors U5, U6, U7, resistors R41, R43, R45 and capacitors C22, C23, and C24, wherein a VDD terminal of the hall sensor U5 is connected to the resistor R41 and the capacitor C22 in sequence, then grounded, and simultaneously connected to a 5V voltage output terminal of the step-down circuit; the OUT end of the Hall sensor U5 is connected with the tenth pin of the main control chip U4;

the VDD end of the Hall sensor U6 is connected with the resistor R43 and the capacitor C23 in sequence, then is grounded, and is simultaneously connected with the 5V voltage output end of the voltage reduction circuit; the OUT end of the Hall sensor U6 is connected with the eleventh pin of the main control chip U4;

the VDD end of the Hall sensor U7 is connected with the resistor R45 and the capacitor C24 in sequence, then is grounded, and is simultaneously connected with the 5V voltage output end of the voltage reduction circuit; and the OUT end of the Hall sensor U7 is connected with the twelfth pin of the main control chip U4.

Preferably, the output function signal circuit comprises a speed regulation signal output circuit, a brake signal output circuit, a forward and reverse rotation signal output circuit, a start and stop signal output circuit and a rotation speed signal output circuit, the speed regulation signal output circuit comprises resistors R12 and R8 and a capacitor C10, one end of the resistor R8 is connected with the 5V voltage output end of the voltage reduction circuit, the other end of the resistor R8 is connected with the capacitor C10 and then grounded and connected with one end of the resistor R12, and the other end of the resistor R12 is used as the speed regulation signal output end of the speed regulation signal output circuit; a node SPEED of the SPEED regulating signal output circuit is connected with a twenty-eighth pin of the main control chip U4;

the brake signal output circuit comprises resistors R13 and R14, one end of the resistor R14 is connected with the thirty-second pin of the main control chip U4, and the other end of the resistor R13 is connected in series and then is connected with the 5V voltage output end of the voltage reduction circuit and serves as the brake signal output end of the brake signal output circuit;

the positive and negative rotation signal output circuit comprises resistors R15 and R16, one end of the resistor R16 is connected with the twenty-ninth pin of the main control chip U4, and the other end of the resistor R15 is connected in series, then is connected with the 5V voltage output end of the voltage reduction circuit and serves as the positive and negative rotation signal output end of the positive and negative rotation signal output circuit;

the start-stop signal output circuit comprises resistors R47 and R48, one end of the resistor R48 is connected with the thirty-one pin of the main control chip U4, and the other end of the resistor R47 is connected in series and then is connected with the 5V voltage output end of the voltage reduction circuit and serves as the start-stop signal output end of the start-stop signal output circuit;

the rotating speed signal output circuit comprises resistors R46 and R25, one end of the resistor R25 is connected with the seventh pin of the main control chip U4, and the other end of the resistor R46 is connected in series with the 5V voltage output end of the voltage reduction circuit and serves as the rotating speed signal output end of the rotating speed signal output circuit.

Preferably, the under-voltage protection circuit includes resistors R6 and R11 and a capacitor C8, one end of the resistor R6 is connected to a power VCC, and the other end is connected in series with the resistor R11, then grounded, and connected in series with the capacitor C8, then grounded, and connected to the thirtieth pin of the main control chip U4;

the overtemperature protection circuit comprises a resistor R30, a capacitor C20 and a resistor RT1, one end of the resistor R30 is connected with a 5V voltage output end of the voltage reduction circuit, the other end of the resistor R30 is connected with the ground after the resistor RT1 and is connected with the ground after the capacitor C20 and is connected with the twenty-four pins of the main control chip U4.

Preferably, the voltage reduction circuit comprises a voltage reduction chip U1, a voltage reduction chip U2, resistors R1, R4, R7, capacitors C1, C2, C3, C4, a diode D1 and an inductor L1, and a fifth port of the voltage reduction chip U1 is connected with a power supply VCC; the resistor R1 is connected between a fifth port and a fourth port of the buck chip U1, the second port is grounded, the third port is grounded after being connected with the resistor R7, the sixth port is connected with the inductor L1 in series and then is connected with the input end Vin of the buck chip U2, and the sixth port is grounded after being connected with the inverted diode D1; the capacitor C1 is connected between the first port and the sixth port of the buck chip U1;

the input end Vin of the buck chip U2 is connected to the capacitor C2, then grounded, and connected to the resistor R4 and the resistor R7 in series in sequence, and then grounded; the grounding end GND of the voltage reduction chip U2 is grounded; the output end Vout of the voltage reduction chip U2 is connected with the capacitor C3 and then grounded, and the capacitor C4 is connected in parallel with the two ends of the capacitor C3;

an input end Vin of the voltage reduction chip U2 is used as a 12V voltage output end of the voltage reduction circuit; the output end Vout of the voltage reduction chip U2 is used as a 5V voltage output end of the voltage reduction circuit.

Preferably, the driver circuit further comprises an input filter circuit connected to the input end of the voltage reduction circuit and a singlechip programming port circuit connected to a main control chip U4 in the main control circuit,

the input filter circuit comprises a capacitor C6 and an electrolytic capacitor E1, wherein the anode of the electrolytic capacitor E1 is connected with a power supply VCC, and the cathode of the electrolytic capacitor E1 is grounded; the capacitor C6 is connected in parallel with the two ends of the electrolytic capacitor E1;

the singlechip burning port circuit comprises a connecting piece P1 and a resistor R34, and a first port of the connecting piece P1 is connected with a 5V voltage output end of the voltage reduction circuit; the resistor R34 is connected between the first port and the second port of the connecting piece P1, and the second port of the connecting piece P1 is connected with the twenty-sixth pin of the main control chip U4;

the third port of the connecting piece P1 is connected with the first pin of the main control chip U4;

the fourth port of the connecting piece P1 is grounded;

the chip model of the main control chip U4 is STM8S 903;

the chip model of a driving chip U3 in the driving circuit is FD 6288;

the models of double N tubes M1, M2 and M3 in the three-phase bridge circuit are CRMP110N06L 2S;

the model of a buck chip U1 in the buck circuit is MP259, and the model of a buck chip U2 is 78L 05;

the model of a comparator IC1 in the over-current detection circuit is SGM 8631.

The utility model also provides a built-in driver of motor, place in the motor, be provided with in the driver circuit.

The utility model has the advantages that:

1. the driver circuit has simple structure and stronger anti-interference capability;

2. the driver can control the positive and negative rotation, speed regulation, braking, starting and stopping and the like of the motor, and the motor control function is richer;

3. the driver has the protection functions of overvoltage, undervoltage, overcurrent, overtemperature, locked rotor, Hall phase loss and the like on the motor, so that the motor is safer to use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a block diagram of an internal circuit module of a motor built-in driver according to an embodiment of the present invention;

fig. 2 is a connection structure diagram of a main control circuit and an over-temperature protection circuit in a driver circuit according to an embodiment of the present invention;

fig. 3 is a circuit configuration diagram of a driver circuit in the driver circuit;

fig. 4 is a connection junction diagram of a three-phase bridge circuit and an overcurrent detection circuit in the driver circuit;

FIG. 5 is a circuit configuration diagram of a three-phase Hall sensor circuit in a driver circuit;

fig. 6 is a circuit configuration diagram of an output function signal circuit in the driver circuit;

FIG. 7 is a circuit diagram of an undervoltage protection circuit in a driver circuit;

fig. 8 is a circuit configuration diagram of a step-down circuit in the driver circuit;

fig. 9 is a circuit configuration diagram of an input filter circuit in the driver circuit;

fig. 10 is a circuit configuration diagram of a one-chip microcomputer burning port circuit in the driver circuit.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a block diagram of an internal circuit module of a motor internal driver according to an embodiment of the present invention. As shown in fig. 1, the internal driver circuit of the driver built in the motor includes a main control circuit and a driving circuit respectively connected with the main control circuit, an overcurrent detection circuit, a three-phase hall sensor circuit, an output function signal circuit, an undervoltage protection circuit and an overtemperature protection circuit, the driving circuit is further connected with a three-phase bridge circuit, the three-phase bridge circuit is further connected with the overcurrent detection circuit, the driver circuit further includes a voltage reduction circuit, and the voltage reduction circuit reduces the input voltage VCC to 12V output voltage and 5V output voltage to provide working voltage for other circuits.

Specifically, the main control circuit is shown in fig. 2, and includes a main control chip U4, a resistor R29, a capacitor C14, a capacitor C15, and a capacitor C16, wherein a first pin of the main control chip U4 is connected in series with the resistor R29 and then connected to a 5V voltage output terminal of the voltage step-down circuit (see fig. 8), and is connected to the capacitor C16 and then grounded; a second pin, a third pin, an eighth pin, a ninth pin, a seventeenth pin, twenty-first to twenty-third pins and twenty-fifth pin of the main control chip U4 are suspended;

the fourth pin of the main control chip U4 is grounded, a capacitor C14 is connected between the fifth pin and the fourth pin, a capacitor C15 is connected between the sixth pin and the fourth pin, and the sixth pin of the main control chip U4 is connected with the 5V voltage output end of the step-down circuit.

The over-temperature protection circuit connected with the main control circuit is shown in fig. 2 and comprises a resistor R30, a capacitor C20 and a resistor RT1, one end of the resistor R30 is connected with a 5V voltage output end of the voltage reduction circuit, and the other end of the resistor R30 is connected with the resistor RT1 in series and then is grounded, connected with the capacitor C20 in series and then is connected with the twenty-four pins of the main control chip U4.

Specifically, the driving circuit is shown in fig. 3 and includes a driving chip U3, diodes D2, D3, D4, and capacitors C11, C12, C5, and C9, wherein a first pin, a second pin, and a third pin of the driving chip U3 are respectively connected to an eighteenth pin, a nineteenth pin, and a twentieth pin of the main control chip U4;

the fourth pin, the fifth pin and the sixth pin of the driving chip U3 are respectively connected with the sixteenth pin, the fifteenth pin and the fourteenth pin of the main control chip U4;

a seventh pin of the driving chip U3 is connected with a 12V voltage output end of the voltage reduction circuit, an eighth pin of the driving chip U3 is grounded, and a capacitor C11 is connected between the seventh pin and the eighth pin of the driving chip U3;

ninth to eleventh pins and thirteenth, sixteenth and nineteenth pins of the driving chip U3 are respectively connected to corresponding input ports of the three-phase bridge circuit;

a twelfth pin, a fifteenth pin and an eighteenth pin of the driving chip U3 are respectively connected to corresponding output ports of the three-phase bridge circuit;

a capacitor C12 is connected between the twelfth pin and the fourteenth pin of the driving chip U3; the fourteenth pin of the driving chip U3 is connected with the inverted diode D4 and then connected with the 12V voltage output end of the voltage reduction circuit;

a capacitor C9 is connected between the fifteenth pin and the seventeenth pin of the driving chip U3; the seventeenth pin of the driving chip U3 is connected with the inverted diode D3 and then connected with the 12V voltage output end of the voltage reduction circuit;

a capacitor C5 is connected between the eighteenth pin and the twentieth pin of the driving chip U3; the twentieth pin of the driving chip U3 is connected with the inverted diode D2 and then connected with the 12V voltage output end of the voltage reduction circuit.

Specifically, the three-phase bridge circuit is shown in fig. 4 and comprises double N tubes M1, M2 and M3, resistors R18, R21, R26, R28, R31, R33 and RS1, wherein a fifth port and a sixth port of the double N tube M1 are connected with a first port of the double N tube M1 after being short-circuited, and the short-circuited fifth port and the short-circuited sixth port are connected with an eighteenth pin of a driving chip U3; a seventh port and an eighth port of the double N-tube M1 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M1 is connected in series with the resistor R18 and then connected to a nineteenth pin of the driving chip U3, and a fourth port is connected in series with the resistor R21 and then connected to an eleventh pin of the driving chip U3; the third port of the double N pipe M1 is simultaneously connected with the third ports of the double N pipe M2 and the double N pipe M3;

the fifth port and the sixth port of the double N tube M2 are connected with the first port after short circuit, and the short-circuited fifth port and sixth port are connected to the fifteenth pin of the drive chip U3; a seventh port and an eighth port of the double N-tube M2 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M2 is connected in series with the resistor R26 and then connected to a sixteenth pin of the driving chip U3, and a fourth port is connected in series with the resistor R28 and then connected to a tenth pin of the driving chip U3;

the fifth port and the sixth port of the double N-tube M3 are connected with the first port after short circuit, and the short-circuited fifth port and sixth port are connected to the twelfth pin of the drive chip U3; a seventh port and an eighth port of the double N-tube M3 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M3 is connected in series with the resistor R31 and then connected to a thirteenth pin of the driving chip U3, and a fourth port is connected in series with the resistor R33 and then connected to a ninth pin of the driving chip U3;

one end of the resistor RS1 is connected with the third port of the double-N tube M3, and the other end is grounded.

As shown in fig. 4, the over-current detection circuit includes a comparator IC1, resistors R35, R2, R3, R5 and a capacitor C18, wherein a third port of the comparator IC1 is connected in series with the resistor R35 and then connected to a third port of the double-N tube M3; the fourth port of the comparator IC1 is connected in series with the resistor R5 and then grounded; the fifth port of the comparator IC1 is connected with the 5V voltage output end of the voltage reduction circuit, and the second port is grounded; a first port of the comparator IC1 is connected in series with the resistor R2 and the capacitor C18 in sequence and then grounded, and a resistor R3 is connected in series between the first port and a fourth port of the comparator IC 1; and a node CURR in the over-current detection circuit is connected with a thirteenth pin of the main control chip U4.

Specifically, the three-phase hall sensor circuit is shown in fig. 5, and includes hall sensors U5, U6, U7, resistors R41, R43, R45, and capacitors C22, C23, and C24, wherein the VDD terminal of the hall sensor U5 is connected to the resistor R41 and the capacitor C22 in sequence, then grounded, and simultaneously connected to the 5V voltage output terminal of the step-down circuit; the OUT end of the Hall sensor U5 is connected with the tenth pin of the main control chip U4;

the VDD end of the Hall sensor U6 is connected with the resistor R43 and the capacitor C23 in sequence, then is grounded, and is simultaneously connected with the 5V voltage output end of the voltage reduction circuit; the OUT end of the Hall sensor U6 is connected with the eleventh pin of the main control chip U4;

the VDD end of the Hall sensor U7 is connected with the resistor R45 and the capacitor C24 in sequence, then is grounded, and is simultaneously connected with the 5V voltage output end of the voltage reduction circuit; the OUT terminal of the Hall sensor U7 is connected with the twelfth pin of the main control chip U4.

Specifically, the output function signal circuit is shown in fig. 6 and includes a speed regulation signal output circuit, a brake signal output circuit, a forward/reverse rotation signal output circuit, a start/stop signal output circuit and a rotation speed signal output circuit, the speed regulation signal output circuit includes resistors R12, R8 and a capacitor C10, one end of the resistor R8 is connected to the 5V voltage output end of the voltage reduction circuit, the other end of the resistor R8 is connected to the ground after being connected to the capacitor C10 and is connected to one end of the resistor R12, and the other end of the resistor R12 is used as the speed regulation signal output end of the speed regulation signal output circuit; a node SPEED of the SPEED regulating signal output circuit is connected with a twenty-eighth pin of the main control chip U4;

the brake signal output circuit comprises resistors R13 and R14, one end of the resistor R14 is connected with the thirty-second pin of the main control chip U4, and the other end of the resistor R13 is connected in series and then connected with the 5V voltage output end of the voltage reduction circuit and serves as the brake signal output end of the brake signal output circuit;

the positive and negative rotation signal output circuit comprises resistors R15 and R16, one end of the resistor R16 is connected with the twenty-ninth pin of the main control chip U4, and the other end of the resistor R15 is connected in series, then is connected with the 5V voltage output end of the voltage reduction circuit and serves as the positive and negative rotation signal output end of the positive and negative rotation signal output circuit;

the start-stop signal output circuit comprises resistors R47 and R48, one end of the resistor R48 is connected with the thirty-one pin of the main control chip U4, and the other end of the resistor R47 is connected in series and then connected with the 5V voltage output end of the voltage reduction circuit and serves as the start-stop signal output end of the start-stop signal output circuit;

the rotating speed signal output circuit comprises resistors R46 and R25, one end of the resistor R25 is connected with the seventh pin of the main control chip U4, and the other end of the resistor R46 is connected in series and then connected with the 5V voltage output end of the voltage reduction circuit and serves as the rotating speed signal output end of the rotating speed signal output circuit.

Specifically, the under-voltage protection circuit is shown in fig. 7 and includes resistors R6 and R11 and a capacitor C8, one end of the resistor R6 is connected to the VCC, and the other end is connected in series with the resistor R11 and then grounded, and connected in series with the capacitor C8 and then grounded and connected to the thirtieth pin of the main control chip U4.

Specifically, the voltage reduction circuit is as shown in fig. 8, and includes a voltage reduction chip U1, a voltage reduction chip U2, resistors R1, R4, R7, capacitors C1, C2, C3, C4, a diode D1, and an inductor L1, and a fifth port of the voltage reduction chip U1 is connected to a power supply VCC; a resistor R1 is connected between a fifth port and a fourth port of the voltage reduction chip U1, the second port is grounded, the third port is grounded after being connected with a resistor R7, the sixth port is connected with an inductor L1 in series and then is connected with an input end Vin of the voltage reduction chip U2, and the sixth port is grounded after being connected with an inverted diode D1; the capacitor C1 is connected between the first port and the sixth port of the buck chip U1;

an input end Vin of the voltage reduction chip U2 is grounded after being connected with the capacitor C2, and is grounded after being sequentially connected with the resistor R4 and the resistor R7 in series; the grounding end GND of the voltage reduction chip U2 is grounded; the output end Vout of the voltage reduction chip U2 is connected with the capacitor C3 and then grounded, and the capacitor C4 is connected with the two ends of the capacitor C3 in parallel;

an input end Vin of the voltage reduction chip U2 is used as a 12V voltage output end of the voltage reduction circuit; the output terminal Vout of the buck chip U2 serves as the 5V voltage output terminal of the buck circuit.

The driver circuit also comprises an input filter circuit connected with the input end of the voltage reduction circuit and a singlechip burning port circuit connected with a main control chip U4 in the main control circuit,

specifically, the input filter circuit is shown in fig. 9 and includes a capacitor C6 and an electrolytic capacitor E1, wherein the anode of the electrolytic capacitor E1 is connected to the power source VCC, and the cathode is grounded; the capacitor C6 is connected in parallel across the electrolytic capacitor E1. The input filter circuit is used for filtering voltage pulses when the driver is switched on and switched off.

The singlechip microcomputer burning port circuit comprises a connecting piece P1 and a resistor R34 as shown in fig. 10, wherein a first port of the connecting piece P1 is connected with a 5V voltage output end of a voltage reduction circuit; a resistor R34 is connected between the first port and the second port of the connecting piece P1, and the second port of the connecting piece P1 is connected with the twenty-sixth pin of the main control chip U4;

the third port of the connecting piece P1 is connected with the first pin of the main control chip U4;

the fourth port of the connection P1 is grounded.

In this embodiment, the chip model of the main control chip U4 is preferably STM8S 903;

the chip type of the driving chip U3 in the driving circuit is preferably FD 6288;

the models of the double N tubes M1, M2 and M3 in the three-phase bridge circuit are preferably CRMP110N06L 2S;

the model of the buck chip U1 in the buck circuit is preferably MP259, and the model of the buck chip U2 is preferably 78L 05;

the comparator IC1 in the over-current detection circuit is preferably of the type SGM 8631.

The following briefly explains the motor control function that can be realized by the driver circuit provided in this embodiment:

and a speed regulating signal output circuit in the output function signal circuit outputs a speed regulating signal generated by the main control chip U4 to the motor so as to realize the speed regulating control of the main control chip U4 on the motor. The speed regulation signal supports PLC (0-5V) analog quantity control and PWM control, the analog quantity control is also called analog voltage (0-5V) speed regulation, the speed regulation can be realized by a potentiometer, the speed regulation can also be realized by a main control chip U4, an AD port of the main control chip U4 outputs a 0-5V analog quantity signal as a speed regulation signal of the motor, and then the Ground (GND) of the main control chip U4 and the Ground (GND) of the motor are shared to realize the speed regulation. PWM control is also called duty ratio speed regulation, and a PLC or a PWM signal transmitter outputs a frequency of 0-10KHZ or 0-20KHZ, and then the speed regulation is realized by regulating the pulse width.

The brake signal output circuit in the output function signal circuit outputs a brake signal generated by a main control chip U4 to the motor to control the motor to brake, the signal is suspended to be high level invalid, the grounding is low level to brake immediately, the upper bridge arm (or the lower bridge arm) of a driving MOS tube of the motor is completely switched on, the lower bridge arm (the upper bridge arm) is in a cut-off state, the three-phase stator windings of the motor are all in short circuit, namely a power supply is in short circuit, because the resistance ratio of the windings is smaller, a large short-circuit current can be generated, the kinetic energy of the motor is quickly released, and therefore the motor can instantly generate a large brake torque, and the effect of quick braking can be achieved.

The positive and negative rotation signal output circuit in the output function signal circuit outputs a motor positive and negative rotation signal generated by the main control chip U4 to the motor so as to control the motor to rotate, the signal is suspended to be high level invalid, the grounding is low level to change the rotation direction of the motor, for example, the motor initially rotates to CCW, the signal line is grounded, and then the electrode rotates to CW.

The start-stop signal output circuit in the output function signal circuit outputs a motor start-stop signal generated by the main control chip U4 to the motor to control the start and stop of the motor, the signal is suspended and invalid at a high level, the grounding is stopped by the low level motor, the signal controls the motor to stop working by slowly closing the duty ratio of the motor, so that the stability of the whole circuit is not influenced, when the motor is frequently switched, the signal can avoid the impact of a power supply on/off machine on a driver, and the service life of the driver is prolonged.

The rotating speed signal output circuit in the output function signal circuit can output a rotating speed signal generated by the main control chip U4, the signal output is a square wave signal, the actual rotating speed of the motor can be calculated according to the frequency of the square wave signal, and the calculation formula is n ═ f × 60/p, wherein n is the monitored rotating speed of the motor, f is the square wave frequency, and p is the number of pole pairs of the motor.

In addition, a three-phase Hall sensor circuit in the driver circuit can provide a Hall open-phase protection function, and when the Hall of the driver is open-phase or the phase sequence is wrong, the control output of the driver is turned off.

The over-temperature protection circuit in the driver can provide the over-temperature protection function of the driver, and when the temperature of the main control chip U4 exceeds 85 ℃, the output is automatically turned off to prevent the driver from being burnt out.

The undervoltage protection circuit in the driver can provide undervoltage protection function, and the driver can automatically close the output when the input voltage of the driver is lower than 10V;

an over-current detection circuit in the driver can provide an over-current protection function, and the driver can automatically close the output when the load current of the motor exceeds 2.5A.

In addition, the driver circuit can also provide a motor stalling protection function, when the motor is in a stalling state, the driver controls the motor to be powered off after the motor is stalled for 1-1.5 seconds continuously, the driver drives the motor to restart after the motor is powered off for 2-3 seconds, and if the motor is started for 5 times continuously or is in the stalling state, the driver shuts off the output to protect the motor.

The utility model also provides a built-in driver of motor, place the motor in this driver in, be provided with foretell driver circuit in the driver.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims (11)

1. The utility model provides a driver circuit of built-in driver of motor, its characterized in that, include master control circuit and connect respectively master control circuit's drive circuit, overcurrent detection circuit, three-phase hall sensor circuit, output function signal circuit, undervoltage protection circuit and excess temperature protection circuit, drive circuit still connects three-phase bridge circuit, three-phase bridge circuit still connects overcurrent detection circuit, driver circuit still includes a step-down circuit, step-down circuit reduces input voltage VCC and steps down for 12V output voltage and 5V output voltage and provides operating voltage for other circuits.

2. The driver circuit according to claim 1, wherein the main control circuit comprises a main control chip U4, a resistor R29, capacitors C14, C15, and C16, a first pin of the main control chip U4 is connected in series with the resistor R29, then connected to the 5V voltage output terminal of the voltage reduction circuit, and connected to the capacitor C16, then connected to ground; a second pin, a third pin, an eighth pin, a ninth pin, a seventeenth pin, twenty-first to twenty-third pins and twenty-fifth pin of the main control chip U4 are suspended;

the fourth pin of the main control chip U4 is grounded, the capacitor C14 is connected between the fifth pin and the fourth pin, the capacitor C15 is connected between the sixth pin and the fourth pin, and the sixth pin of the main control chip U4 is connected with the 5V voltage output end of the voltage reduction circuit.

3. The driver circuit as claimed in claim 2, wherein the driving circuit comprises a driving chip U3, diodes D2, D3, D4 and capacitors C11, C12, C5 and C9, wherein the first pin, the second pin and the third pin of the driving chip U3 are respectively connected with the eighteenth pin, the nineteenth pin and the twentieth pin of the main control chip U4;

the fourth pin, the fifth pin and the sixth pin of the driving chip U3 are respectively connected with the sixteenth pin, the fifteenth pin and the fourteenth pin of the main control chip U4;

a seventh pin of the driving chip U3 is connected with a 12V voltage output end of the voltage reduction circuit, an eighth pin of the driving chip U3 is grounded, and the capacitor C11 is connected between the seventh pin and the eighth pin of the driving chip U3;

ninth to eleventh pins and thirteenth, sixteenth and nineteenth pins of the driving chip U3 are respectively connected to corresponding input ports of the three-phase bridge circuit;

a twelfth pin, a fifteenth pin and an eighteenth pin of the driving chip U3 are respectively connected to corresponding output ports of the three-phase bridge circuit;

the capacitor C12 is connected between the twelfth pin and the fourteenth pin of the driving chip U3; a fourteenth pin of the driving chip U3 is connected with the inverted diode D4 and then connected with a 12V voltage output end of the voltage reduction circuit;

the capacitor C9 is connected between the fifteenth pin and the seventeenth pin of the driving chip U3; a seventeenth pin of the driving chip U3 is connected with the inverted diode D3 and then connected with a 12V voltage output end of the voltage reduction circuit;

the capacitor C5 is connected between the eighteenth pin and the twentieth pin of the driving chip U3; the twentieth pin of the driving chip U3 is connected with the diode D2 in the reverse direction and then connected with the 12V voltage output end of the voltage reduction circuit.

4. The driver circuit as claimed in claim 3, wherein the three-phase bridge circuit comprises double N tubes M1, M2, M3 and resistors R18, R21, R26, R28, R31, R33, RS1, wherein the fifth port and the sixth port of the double N tube M1 are short-circuited and then connected with the first port thereof, and the short-circuited fifth port and the short-circuited sixth port are connected with the eighteenth pin of the driving chip U3; a seventh port and an eighth port of the double N-tube M1 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M1 is connected in series with the resistor R18 and then connected to a nineteenth pin of the driving chip U3, and a fourth port is connected in series with the resistor R21 and then connected to an eleventh pin of the driving chip U3; the third port of the double N tube M1 is connected to the third ports of the double N tube M2 and the double N tube M3 at the same time;

a fifth port and a sixth port of the double N-tube M2 are connected with the first port after being short-circuited, and the short-circuited fifth port and the short-circuited sixth port are connected to a fifteenth pin of the driving chip U3; a seventh port and an eighth port of the double N-tube M2 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M2 is connected in series with the resistor R26 and then connected to a sixteenth pin of the driver chip U3, and a fourth port is connected in series with the resistor R28 and then connected to a tenth pin of the driver chip U3;

the fifth port and the sixth port of the double N-tube M3 are connected with the first port after short circuit, and the short-circuited fifth port and sixth port are connected to the twelfth pin of the drive chip U3; a seventh port and an eighth port of the double N-tube M3 are connected with a power supply VCC after being in short circuit; a second port of the double-N tube M3 is connected in series with the resistor R31 and then connected to a thirteenth pin of the driving chip U3, and a fourth port is connected in series with the resistor R33 and then connected to a ninth pin of the driving chip U3;

one end of the resistor RS1 is connected with the third port of the double-N tube M3, and the other end of the resistor RS1 is grounded.

5. The driver circuit of claim 4, wherein the over-current detection circuit comprises a comparator IC1, resistors R35, R2, R3, R5 and a capacitor C18, and a third port of the comparator IC1 is connected in series with the resistor R35 and then connected to a third port of the double-N tube M3; the fourth port of the comparator IC1 is connected in series with the resistor R5 and then grounded; a fifth port of the comparator IC1 is connected with a 5V voltage output end of the voltage reduction circuit, and a second port is grounded; the first port of the comparator IC1 is serially connected with the resistor R2 and the capacitor C18 in sequence and then grounded, and the resistor R3 is serially connected between the first port and the fourth port of the comparator IC 1; and a node CURR in the over-current detection circuit is connected with a thirteenth pin of the main control chip U4.

6. The driver circuit as claimed in claim 2, wherein the three-phase hall sensor circuit comprises hall sensors U5, U6, U7, resistors R41, R43, R45 and capacitors C22, C23, C24, a VDD terminal of the hall sensor U5 is connected to ground after being connected to the resistor R41 and the capacitor C22 in sequence, and is connected to a 5V voltage output terminal of the step-down circuit at the same time; the OUT end of the Hall sensor U5 is connected with the tenth pin of the main control chip U4;

the VDD end of the Hall sensor U6 is connected with the resistor R43 and the capacitor C23 in sequence, then is grounded, and is simultaneously connected with the 5V voltage output end of the voltage reduction circuit; the OUT end of the Hall sensor U6 is connected with the eleventh pin of the main control chip U4;

the VDD end of the Hall sensor U7 is connected with the resistor R45 and the capacitor C24 in sequence, then is grounded, and is simultaneously connected with the 5V voltage output end of the voltage reduction circuit; and the OUT end of the Hall sensor U7 is connected with the twelfth pin of the main control chip U4.

7. The driver circuit according to claim 2, wherein the output function signal circuit comprises a speed regulation signal output circuit, a brake signal output circuit, a forward/reverse rotation signal output circuit, a start/stop signal output circuit and a rotation speed signal output circuit, the speed regulation signal output circuit comprises resistors R12, R8 and a capacitor C10, one end of the resistor R8 is connected to the 5V voltage output end of the voltage reduction circuit, the other end of the resistor R8 is connected to the ground after being connected to the capacitor C10 and is connected to one end of the resistor R12, and the other end of the resistor R12 is used as a speed regulation signal output end of the speed regulation signal output circuit; a node SPEED of the SPEED regulating signal output circuit is connected with a twenty-eighth pin of the main control chip U4;

the brake signal output circuit comprises resistors R13 and R14, one end of the resistor R14 is connected with the thirty-second pin of the main control chip U4, and the other end of the resistor R13 is connected in series and then is connected with the 5V voltage output end of the voltage reduction circuit and serves as the brake signal output end of the brake signal output circuit;

the positive and negative rotation signal output circuit comprises resistors R15 and R16, one end of the resistor R16 is connected with the twenty-ninth pin of the main control chip U4, and the other end of the resistor R15 is connected in series, then is connected with the 5V voltage output end of the voltage reduction circuit and serves as the positive and negative rotation signal output end of the positive and negative rotation signal output circuit;

the start-stop signal output circuit comprises resistors R47 and R48, one end of the resistor R48 is connected with the thirty-one pin of the main control chip U4, and the other end of the resistor R47 is connected in series and then is connected with the 5V voltage output end of the voltage reduction circuit and serves as the start-stop signal output end of the start-stop signal output circuit;

the rotating speed signal output circuit comprises resistors R46 and R25, one end of the resistor R25 is connected with the seventh pin of the main control chip U4, and the other end of the resistor R46 is connected in series with the 5V voltage output end of the voltage reduction circuit and serves as the rotating speed signal output end of the rotating speed signal output circuit.

8. The driver circuit of claim 2, wherein the under-voltage protection circuit comprises resistors R6 and R11 and a capacitor C8, one end of the resistor R6 is connected to a power VCC, and the other end of the resistor R6 is connected in series with the resistor R11 and then grounded, and is connected in series with the capacitor C8 and then grounded and connected to the thirtieth pin of the main control chip U4;

the overtemperature protection circuit comprises a resistor R30, a capacitor C20 and a resistor RT1, one end of the resistor R30 is connected with a 5V voltage output end of the voltage reduction circuit, the other end of the resistor R30 is connected with the ground after the resistor RT1 and is connected with the ground after the capacitor C20 and is connected with the twenty-four pins of the main control chip U4.

9. The driver circuit of claim 1, wherein the buck circuit comprises a buck chip U1, a buck chip U2, resistors R1, R4, R7, capacitors C1, C2, C3, C4, a diode D1 and an inductor L1, and a fifth port of the buck chip U1 is connected to a power supply VCC; the resistor R1 is connected between a fifth port and a fourth port of the buck chip U1, the second port is grounded, the third port is grounded after being connected with the resistor R7, the sixth port is connected with the inductor L1 in series and then is connected with the input end Vin of the buck chip U2, and the sixth port is grounded after being connected with the inverted diode D1; the capacitor C1 is connected between the first port and the sixth port of the buck chip U1;

the input end Vin of the buck chip U2 is connected to the capacitor C2, then grounded, and connected to the resistor R4 and the resistor R7 in series in sequence, and then grounded; the grounding end GND of the voltage reduction chip U2 is grounded; the output end Vout of the voltage reduction chip U2 is connected with the capacitor C3 and then grounded, and the capacitor C4 is connected in parallel with the two ends of the capacitor C3;

an input end Vin of the voltage reduction chip U2 is used as a 12V voltage output end of the voltage reduction circuit; the output end Vout of the voltage reduction chip U2 is used as a 5V voltage output end of the voltage reduction circuit.

10. The driver circuit of claim 1, further comprising an input filter circuit connected to the input of the voltage-dropping circuit and a single-chip microcomputer burning port circuit connected to a main control chip U4 in the main control circuit,

the input filter circuit comprises a capacitor C6 and an electrolytic capacitor E1, wherein the anode of the electrolytic capacitor E1 is connected with a power supply VCC, and the cathode of the electrolytic capacitor E1 is grounded; the capacitor C6 is connected in parallel with the two ends of the electrolytic capacitor E1;

the singlechip burning port circuit comprises a connecting piece P1 and a resistor R34, and a first port of the connecting piece P1 is connected with a 5V voltage output end of the voltage reduction circuit; the resistor R34 is connected between the first port and the second port of the connecting piece P1, and the second port of the connecting piece P1 is connected with the twenty-sixth pin of the main control chip U4;

the third port of the connecting piece P1 is connected with the first pin of the main control chip U4;

the fourth port of the connecting piece P1 is grounded;

the chip model of the main control chip U4 is STM8S 903;

the chip model of a driving chip U3 in the driving circuit is FD 6288;

the models of double N tubes M1, M2 and M3 in the three-phase bridge circuit are CRMP110N06L 2S;

the model of a buck chip U1 in the buck circuit is MP259, and the model of a buck chip U2 is 78L 05;

the model of a comparator IC1 in the over-current detection circuit is SGM 8631.

11. A built-in driver for an electric motor built in the electric motor, characterized in that a driver circuit according to any one of claims 1-10 is provided in the driver.

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