阅读说明：本技术 一种电源驱动电路及一体化无刷电机 (Power drive circuit and integrated brushless motor ) 是由 吴靖琪 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种电源驱动电路及一体化无刷电机,其中所述电源驱动电路,其特征在于：包括有MUC主控电路和隔离电源电路,在所述MUC主控电路上连接有MOS驱动电路,电压采样电路,温度采样电路,电流放大电路、三相桥电路,所述隔离电源电路分别与MUC主控电路、MOS驱动电路,电压采样电路,温度采样电路,电流放大电路、三相桥电路相连接。本发明的目的是为了克服现有技术中的不足之处,提供一种结构简单,能将电源,电机驱动控制器和无刷电机三大部件结合一起的一体化无刷电机；本发明另一个目的是提供一种用于上述体化无刷电机的电源驱动电路。(The invention discloses a power supply driving circuit and an integrated brushless motor, wherein the power supply driving circuit is characterized in that: the device comprises a MUC main control circuit and an isolation power circuit, wherein the MUC main control circuit is connected with an MOS drive circuit, a voltage sampling circuit, a temperature sampling circuit, a current amplification circuit and a three-phase bridge circuit, and the isolation power circuit is respectively connected with the MUC main control circuit, the MOS drive circuit, the voltage sampling circuit, the temperature sampling circuit, the current amplification circuit and the three-phase bridge circuit. The invention aims to overcome the defects in the prior art and provide the integrated brushless motor which has a simple structure and can combine three parts, namely a power supply, a motor driving controller and the brushless motor together; another object of the present invention is to provide a power driving circuit for the integrated brushless motor.)

1. A power supply driving circuit characterized by: the device comprises a MUC main control circuit and an isolation power circuit, wherein the MUC main control circuit is connected with an MOS drive circuit, a voltage sampling circuit, a temperature sampling circuit, a current amplification circuit and a three-phase bridge circuit, and the isolation power circuit is respectively connected with the MUC main control circuit, the MOS drive circuit, the voltage sampling circuit, the temperature sampling circuit, the current amplification circuit and the three-phase bridge circuit.

2. A power supply driving circuit according to claim 1, wherein: isolation power supply circuit is including common mode inductance L1, common mode inductance L1 is connected with the mains supply line, common mode inductance L1 is connected with rectifier DB, is connected with filtering electrolytic capacitor EC1 on rectifier DB output, rectifier DB is connected with constant voltage IC, constant voltage IC is connected with isolation transformer, be connected with filtering electrolytic capacitor EC3 on the isolation transformer output, the isolation transformer output respectively with MOS drive circuit, voltage sampling circuit, temperature sampling circuit, current amplification circuit, three-phase bridge circuit are connected.

3. A power supply driving circuit according to claim 1, wherein: the voltage sampling circuit comprises a resistor R110 and a resistor R111 which are arranged in series, one end of the resistor R110 is connected with the output end of the isolation power supply circuit, two ends of the resistor R111 are connected with a capacitor C105 in parallel, and one end of the resistor R111 is grounded.

4. A power supply driving circuit according to claim 1, wherein: the temperature sampling circuit comprises a resistor R112 and a thermistor NTC100 which are arranged in series, one end of the resistor R112 is connected with the output end of the isolation power circuit, two ends of the thermistor NTC100 are connected with a capacitor C106 in parallel, and one end of the thermistor NTC100 is grounded.

5. A power supply driving circuit according to claim 1, wherein: the MOS drive circuit comprises a drive chip MX8324C, a resistor R100 is connected in series between pin 1 and pin 2 of the drive chip MX8324C, pin 1 of the drive chip MX8324C is connected with a capacitor C101, one end of the capacitor C101 is grounded, pin 2 of the drive chip MX8324C is connected with a capacitor C102, one end of the capacitor C102 is grounded, a capacitor C103 is connected in series between pin 15 and pin 16 of the drive chip MX8324C, pin 15 of the drive chip MX8324C is grounded, pin 2 of the drive chip MX8324C is connected with the output end of an isolation power supply QB-B circuit, pin 16 of the drive chip MX8324C is connected with pin 1 of a MUC controller in a master control circuit, pins 9-14 of the drive chip MX8324C are connected with pin 21-16 of the MUC controller in the master control circuit in turn, the MOS bridge circuit comprises a first N + P half-bridge MOS transistor 100, a second N + P half-bridge MOS transistor and a third MOS transistor 102, a pin 1 of the first N + P half-bridge MOS transistor QB100, a pin 1 of the second N + P half-bridge MOS transistor QB101, and a pin 1 of the third N + P half-bridge MOS transistor QB102 are connected in series to be connected to a resistor R116, two ends of the resistor R116 are connected in parallel to a resistor R115, one end of the resistor R116 is grounded, one end of the resistor R116 is connected to a pin 12 of a MUC controller in a MUC master control circuit, a ground end of the resistor R116 is connected to an amplifying circuit, a pin 2 of the first N + P half-bridge MOS transistor QB100 is connected to a pin 8 of a driving chip MX8324C, and a pin 4 of the first N + P half-bridge MOS transistor QB100 is connected to a pin 7 of the driving chip MX 8324C; a pin 2 of the second N + P half-bridge MOS transistor QB101 is connected with a pin 6 of the driving chip MX8324C, and a pin 4 of the second N + P half-bridge MOS transistor QB101 is connected with a pin 5 of the driving chip MX 8324C; a pin 2 of the third N + P half-bridge MOS transistor QB102 is connected with a pin 4 of the driving chip MX8324C, and a pin 4 of the third N + P half-bridge MOS transistor QB102 is connected with a pin 3 of the driving chip MX 8324C; the pin 3 of the first N + P half-bridge MOS tube QB100, the pin 3 of the second N + P half-bridge MOS tube QB101 and the pin 3 of the third N + P half-bridge MOS tube QB102 are respectively connected with the output end of the isolation power supply circuit; the 5-8 feet of first N + P half-bridge MOS pipe QB100 are connected the back and are connected with brushless motor's U utmost point, the 5-8 feet of second N + P half-bridge MOS pipe QB101 are connected the back and are connected with brushless motor's V utmost point, the 5-8 feet of third N + P half-bridge MOS pipe QB102 are connected the back and are connected with brushless motor's W utmost point and are connected.

6. A power supply driving circuit according to claim 1, wherein: the device also comprises a current sampling circuit.

7. The utility model provides an integrated brushless motor, including motor roller support (1) upper end is equipped with connecting portion (2) interior interval of connecting portion (2) is equipped with primary shaft bearing (3) and secondary shaft bearing (4) be equipped with motor shaft (5) in primary shaft bearing (3) and secondary shaft bearing (4) connecting portion (2) outer wall is equipped with stator coil (6) motor shaft (5) above connecting portion (2) is overlapped and is equipped with rotor casing (7) are equipped with permanent magnet (8) on the corresponding position of stator coil (6) motor roller support (1) lower part is equipped with the power cabin body (9) be equipped with integrative drive circuit board (10) of power in the power cabin body (9) be equipped with lead wire hole (11) on the corresponding position of motor roller support (1) and stator coil (6), the outlet end of the stator coil passes through the lead hole and extends into the power supply cabin body (9) and is connected with a power supply integrated drive circuit board (10), and the power supply integrated drive circuit board (10) is provided with a power supply drive circuit according to any one of claims 1-6.

8. A brushless electric machine according to claim 7, wherein: a plurality of air holes (12) are uniformly distributed on the upper end surface of the rotor shell (7) along the circumferential direction.

9. A brushless electric machine according to claim 7, wherein: a rotating shaft is arranged in the air holes (12), and a sealing adjusting plate (13) capable of sealing the air holes (12) is arranged on the rotating shaft.

10. A brushless electric machine according to claim 7, wherein: a fan impeller is arranged on a motor shaft (5) in the power supply cabin body (9).

Technical Field

The invention belongs to the field of motors, and relates to a power supply driving circuit; the invention also relates to an integrated brushless motor driven by the power supply driving circuit.

Background

A brushless motor is a brushless and commutator (or slip ring) motor that operates by varying the frequency and shape of alternating current waves directed into the windings of its armature winding. Brushless motors are widely used by various manufacturers because of their advantages of high efficiency, low energy consumption, low noise, ultra-long life, high reliability, servo control, stepless frequency control, relatively low cost, simplicity, easy use, etc.

Brushless motor on the current market is that motor body and driver separation need connect sensor line and motor line during the use, and is troublesome, also breaks down easily. Therefore, the development of an integrated brushless motor is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the integrated brushless motor which has a simple structure and can combine three parts, namely a power supply, a motor driving controller and the brushless motor together;

another object of the present invention is to provide a power driving circuit for the integrated brushless motor.

In order to achieve the above object, the present invention adopts the following scheme for a power supply driving circuit:

a power supply driving circuit characterized by: the device comprises a MUC main control circuit and an isolation power circuit, wherein the MUC main control circuit is connected with an MOS drive circuit, a voltage sampling circuit, a temperature sampling circuit, a current amplification circuit and a three-phase bridge circuit, and the isolation power circuit is respectively connected with the MUC main control circuit, the MOS drive circuit, the voltage sampling circuit, the temperature sampling circuit, the current amplification circuit and the three-phase bridge circuit.

As another improvement of the power driving circuit of the present invention, the isolation power circuit includes a common mode inductor L1, the common mode inductor L1 is connected to a mains supply line, the common mode inductor L1 is connected to a rectifier DB, a filter electrolytic capacitor EC1 is connected to an output terminal of the rectifier DB, the rectifier DB is connected to a constant voltage IC, the constant voltage IC is connected to an isolation transformer, the output terminal of the isolation transformer is connected to the filter electrolytic capacitor EC3, and an output terminal of the isolation transformer is connected to a MOS driving circuit, a voltage sampling circuit, a temperature sampling circuit, a current amplifying circuit, and a three-phase bridge circuit, respectively.

As another improvement of the power supply driving circuit of the present invention, the voltage sampling circuit includes a resistor R110 and a resistor R111 which are arranged in series, one end of the resistor R110 is connected to the output end of the isolated power supply circuit, a capacitor C105 is connected in parallel to two ends of the resistor R111, and one end of the resistor R111 is grounded.

As another improvement of the power driving circuit of the invention, the temperature sampling circuit comprises a resistor R112 and a thermistor NTC100 which are arranged in series, one end of the resistor R112 is connected with the output end of the isolation power circuit, two ends of the thermistor NTC100 are connected with a capacitor C106 in parallel, and one end of the thermistor NTC100 is grounded.

As another improvement of the power driving circuit of the present invention, the MOS driving circuit includes a driving chip MX8324C, a resistor R100 is connected in series between pin 1 and pin 2 of the driving chip MX8324C, pin 1 of the driving chip MX8324C is connected to a capacitor C101, one end of the capacitor C101 is grounded, pin 2 of the driving chip MX8324C is connected to a capacitor C102, one end of the capacitor C102 is grounded, a capacitor C103 is connected in series between pin 15 and pin 16 of the driving chip MX8324C, pin 15 of the driving chip MX8324C is grounded, pin 2 of the driving chip MX8324C is connected to an output end of the isolated power circuit, pin 16 of the driving chip MX8324C is connected to pin 1 of the MUC controller in the MUC master circuit, pins 9 to 14 of the driving chip MX8324C are sequentially connected to pins 21 to 16 of the MUC controller in the MUC master circuit, and the three-phase bridge circuit includes a first half-bridge N + P100 MOS transistor, A second N + P half-bridge MOS transistor QB101 and a third N + P half-bridge MOS transistor QB102, wherein pin 1 of the first N + P half-bridge MOS transistor QB100, pin 1 of the second N + P half-bridge MOS transistor QB101, and pin 1 of the third N + P half-bridge MOS transistor QB102 are connected in series to be connected to a resistor R116, two ends of the resistor R116 are connected in parallel to a resistor R115, one end of the resistor R116 is grounded, one end of the resistor R116 is connected to a pin 12 of a MUC controller in a MUC main control circuit, a ground end of the resistor R116 is connected to an amplifying circuit, pin 2 of the first N + P half-bridge MOS transistor QB100 is connected to a pin 8 of a driving chip MX8324C, and pin 4 of the first N + P half-bridge MOS transistor QB100 is connected to a pin 7 of a driving chip 8324 MX 8324C; a pin 2 of the second N + P half-bridge MOS transistor QB101 is connected with a pin 6 of the driving chip MX8324C, and a pin 4 of the second N + P half-bridge MOS transistor QB101 is connected with a pin 5 of the driving chip MX 8324C; a pin 2 of the third N + P half-bridge MOS transistor QB102 is connected with a pin 4 of the driving chip MX8324C, and a pin 4 of the third N + P half-bridge MOS transistor QB102 is connected with a pin 3 of the driving chip MX 8324C; the pin 3 of the first N + P half-bridge MOS tube QB100, the pin 3 of the second N + P half-bridge MOS tube QB101 and the pin 3 of the third N + P half-bridge MOS tube QB102 are respectively connected with the output end of the isolation power supply circuit; the 5-8 feet of first N + P half-bridge MOS pipe QB100 are connected the back and are connected with brushless motor's U utmost point, the 5-8 feet of second N + P half-bridge MOS pipe QB101 are connected the back and are connected with brushless motor's V utmost point, the 5-8 feet of third N + P half-bridge MOS pipe QB102 are connected the back and are connected with brushless motor's W utmost point and are connected.

As another improvement of the power supply driving circuit, the power supply driving circuit further comprises a current sampling circuit.

In order to achieve the above object, the present invention adopts the following solutions:

an integrated brushless motor comprises a motor roller bracket, wherein the upper end of the motor roller bracket is provided with a connecting part, a first bearing seat and a second bearing seat are arranged in the connecting part at intervals, a motor shaft is arranged in the first bearing seat and the second bearing seat, a stator coil is arranged on the outer wall of the connecting part, a rotor shell is sleeved on the motor shaft above the connecting part, permanent magnets are arranged at the corresponding positions of the rotor shell and the stator coil, a power supply cabin body is arranged at the lower part of the motor roller bracket, a power supply integrated driving circuit board is arranged in the power supply cabin body, lead wire holes are arranged at the positions of the motor roller support and the stator coil, the wire outlet end of the stator coil passes through the wire leading hole to extend into the power supply cabin body and is connected with the power supply integrated driving circuit board, a power supply driving circuit as claimed in any one of claims 1 to 6 provided on the power supply integrated driving circuit board.

As another improvement of the power driving circuit, a plurality of air holes are uniformly distributed on the upper end surface of the rotor shell along the circumferential direction.

As another improvement of the power driving circuit, a rotating shaft is arranged in the air holes, and a sealing adjusting plate capable of sealing the air holes is arranged on the rotating shaft.

As another improvement of the power supply driving circuit, a fan impeller is arranged on a motor shaft in the power supply cabin.

In summary, compared with the prior art, the invention has the beneficial effects that:

the power supply integrated driving circuit board integrally combines the high-voltage power supply and the motor drive together, and is convenient and fast to assemble, free of connecting wires and space-saving.

Drawings

FIG. 1 is a schematic cross-sectional view of an integrated brushless motor according to the present invention;

FIG. 2 is a perspective view of the integrated brushless motor of the present invention;

FIG. 3 is a schematic cross-sectional perspective view of an integrated brushless motor according to the present invention;

FIG. 4 is a schematic view of a power integrated brushless motor rotor housing according to the present invention;

FIG. 5 is a schematic view of a power supply integrated driving circuit board according to the present invention;

FIG. 6 is a schematic diagram of a power driving circuit according to the present invention;

FIG. 7 is a schematic diagram of an isolated power supply of the present invention;

FIG. 8 is a schematic diagram of a MUC master control circuit according to the present invention;

FIG. 9 is a schematic diagram of a voltage sampling circuit according to the present invention;

FIG. 10 is a schematic diagram of a temperature sampling circuit of the present invention;

FIG. 11 is a diagram of a MOS driver circuit according to the present invention;

fig. 12 is a schematic diagram of a three-phase bridge circuit of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

Referring to fig. 6-12, the power driving circuit of the present invention includes a MUC main control circuit and an isolation power circuit, wherein the MUC main control circuit is connected with a MOS driving circuit, a voltage sampling circuit, a temperature sampling circuit, a current amplifying circuit, and a three-phase bridge circuit, and the isolation power circuit is respectively connected with the MUC main control circuit, the MOS driving circuit, the voltage sampling circuit, the temperature sampling circuit, the current amplifying circuit, and the three-phase bridge circuit.

The isolation power supply circuit comprises a common-mode inductor L1, wherein the common-mode inductor L1 is connected with a mains supply line, the common-mode inductor L1 is connected with a rectifier DB, the output end of the rectifier DB is connected with a filter electrolytic capacitor EC1, the rectifier DB is connected with a constant-voltage IC, the constant-voltage IC is connected with an isolation transformer, the output end of the isolation transformer is connected with a filter electrolytic capacitor EC3, and the output end of the isolation transformer is respectively connected with an MOS drive circuit, a voltage sampling circuit, a temperature sampling circuit, a current amplification circuit and a three-phase bridge circuit.

The working principle of the isolated power supply circuit of the invention is as follows: commercial power AC 220V is rectified into 311V direct current voltage to an electrolytic capacitor EC for filtering through a common mode inductor L1 and a rectifier DB through a fuse F1, the bus voltage enters a constant voltage IC U1, the voltage is reduced to 24V voltage through an isolation transformer T1, the 24V voltage is output to a filtering electrolytic capacitor EC3 and is supplied to an MCU main control circuit, an MOS driving circuit, a voltage sampling circuit, a temperature sampling circuit, a current amplifying circuit and a three-phase bridge circuit for power supply.

The MUC master control circuit comprises a MUC controller, a capacitor C100 is arranged between pins 1 and 24 of the MUC controller, the MCU controller is electrified, U100 is initialized to define the operation data processing of each IO port, and a Vbus voltage sampling circuit reads a current voltage signal and feeds the current voltage signal back to an 8-pin HV-AD of the MCU controller to perform voltage data comparison. The temperature sampling circuit uses an NTC resistor as a power device temperature detection feedback to a 2-pin NTC of the MCU controller for over-temperature protection processing. After the signals of the MCU controller are normally fed back, the signals are pre-driven by the MOS driving chip MX8324C to control three double-MOS power devices to form a three-phase bridge circuit to drive the brushless motor.

The voltage sampling circuit comprises a resistor R110 and a resistor R111 which are arranged in series, one end of the resistor R110 is connected with the output end of the isolation power supply circuit, two ends of the resistor R111 are connected with a capacitor C105 in parallel, and one end of the resistor R111 is grounded.

The power supply voltage sampling circuit in the am divider divides a signal into an MCU controller for processing by connecting an R110 resistor and an R111 resistor in series, and has the main function of judging whether the current input voltage is normal or not to ensure the normal work of the brushless motor. The capacitor C105 is a filter capacitor.

The temperature sampling circuit comprises a resistor R112 and a thermistor NTC100 which are arranged in series, wherein one end of the resistor R112 is connected with the output end of an isolation power supply circuit, two ends of the thermistor NTC100 are connected with a capacitor C106 in parallel, and one end of the thermistor NTC100 is grounded.

The temperature sampling circuit of the invention divides a voltage into signals by connecting an R112 resistor and an NTC100 resistor in series and sends the signals to an MCU controller for processing, and the temperature sampling circuit mainly has the functions of detecting the current working temperature state of the MOS tube NCE4614 and feeding back signals to the MCU to perform an over-temperature protection function to reduce the rotating speed of the motor or close the motor when the current temperature exceeds the rated temperature of 120 ℃. Thereby protecting the power device from burning out. The capacitor C106 is a filter capacitor.

The MOS drive circuit comprises a drive chip MX8324C, a resistor R100 is connected in series between a pin 1 and a pin 2 of the drive chip MX8324C, a pin 1 of the drive chip MX8324C is connected with a capacitor C101, one end of the capacitor C101 is grounded, a pin 2 of the drive chip MX8324C is connected with a capacitor C102, one end of the capacitor C102 is grounded, a capacitor C103 is connected in series between a pin 15 and a pin 16 of the drive chip MX8324C, a pin 15 of the drive chip MX8324C is grounded, a pin 2 of the drive chip MX8324C is connected with an output end of an isolation power supply QB circuit, a pin 16 of the drive chip MX8324C is connected with a pin 1 of a MUC controller in a MUC master control circuit, pins 9-14 of the drive chip MX83 8324C are sequentially connected with pins 21-16 of the MUC controller in the MUC master control circuit, and the MOS bridge circuit comprises a first N + half-bridge MOS transistor P100, a second N + MOS transistor QB102 and a third MOS transistor QB102, a pin 1 of the first N + P half-bridge MOS transistor QB100, a pin 1 of the second N + P half-bridge MOS transistor QB101, and a pin 1 of the third N + P half-bridge MOS transistor QB102 are connected in series to be connected to a resistor R116, two ends of the resistor R116 are connected in parallel to a resistor R115, one end of the resistor R116 is grounded, one end of the resistor R116 is connected to a pin 12 of a MUC controller in a MUC master control circuit, a ground end of the resistor R116 is connected to an amplifying circuit, a pin 2 of the first N + P half-bridge MOS transistor QB100 is connected to a pin 8 of a driving chip MX8324C, and a pin 4 of the first N + P half-bridge MOS transistor QB100 is connected to a pin 7 of the driving chip MX 8324C; a pin 2 of the second N + P half-bridge MOS transistor QB101 is connected with a pin 6 of the driving chip MX8324C, and a pin 4 of the second N + P half-bridge MOS transistor QB101 is connected with a pin 5 of the driving chip MX 8324C; a pin 2 of the third N + P half-bridge MOS transistor QB102 is connected with a pin 4 of the driving chip MX8324C, and a pin 4 of the third N + P half-bridge MOS transistor QB102 is connected with a pin 3 of the driving chip MX 8324C; the pin 3 of the first N + P half-bridge MOS tube QB100, the pin 3 of the second N + P half-bridge MOS tube QB101 and the pin 3 of the third N + P half-bridge MOS tube QB102 are respectively connected with the output end of the isolation power supply circuit; the 5-8 feet of first N + P half-bridge MOS pipe QB100 are connected the back and are connected with brushless motor's U utmost point, the 5-8 feet of second N + P half-bridge MOS pipe QB101 are connected the back and are connected with brushless motor's V utmost point, the 5-8 feet of third N + P half-bridge MOS pipe QB102 are connected the back and are connected with brushless motor's W utmost point and are connected.

The MOS drive circuit comprises a 3-path NMOS power tube drive circuit and a 3-path PMOS power tube drive circuit in a MX8324C power tube drive circuit of a drive chip. A78L 05 three-terminal voltage regulator is integrated in the circuit, and a stable 5V output power supply can be provided. When the working voltage of the circuit is 24V, the internal control circuit can enable the grid voltage of the PMOS power tube to be about 12V when the PMOS power tube is started (namely the VGS voltage of the PMOS power tube is about-12V). And the rapid on-off of NMOS and PMOS can be realized by the communication control with the MCU. The periphery C103 filters the output 5V voltage.

The three-phase bridge circuit is composed of three N + P half-bridge MOS tubes, a current detection resistor R116 and a resistor R115, and a signal is sent to the pre-drive MX8324 through an MCU program algorithm to drive the three half-bridge MOS tubes to drive the three-phase brushless motor.

The invention also comprises a current sampling circuit.

Referring to fig. 1-5, the integrated brushless motor of the present invention comprises a motor roller support 1, a connecting portion 2 is disposed at an upper end of the motor roller support 1, a first bearing housing 3 and a second bearing housing 4 are disposed in the connecting portion 2 at an interval, a motor shaft 5 is disposed in the first bearing housing 3 and the second bearing housing 4, a stator coil 6 is disposed on an outer wall of the connecting portion 2, a rotor housing 7 is sleeved on the motor shaft 5 above the connecting portion 2, a permanent magnet 8 is disposed at a position of the rotor housing 7 corresponding to the stator coil 6, a power supply cabin 9 is disposed at a lower portion of the motor roller support 1, a power supply integrated driving circuit board 10 is disposed in the power supply cabin 9, a lead hole 11 is disposed at a position of the motor roller support 1 corresponding to the stator coil 6, and a terminal of the stator coil passes through the lead hole to extend into the power supply cabin 9 and is connected, a power driving circuit is arranged on the power integrated driving circuit board 10. Wherein the power driving circuit is as described above.

According to the invention, the support grids are arranged on the inner end faces of the connecting parts 2, the lead holes 11 are arranged in the support grids, the power supply integrated drive circuit board 10 is arranged on the support grids, the support grids effectively enhance the overall strength of the connecting parts 2, meanwhile, a plurality of parts of the inner end faces of the power supply integrated drive circuit board 10 are hollowed out from the inner end faces of the connecting parts 2, and a plurality of air holes are correspondingly arranged on the upper end faces and the hollowed-out positions of the connecting parts 2, so that the heat dissipation of the power supply integrated drive circuit board 10 is facilitated, the power supply integrated drive circuit board 10 keeps better working efficiency, and the service life of.

In one embodiment of the integrated brushless motor of the present invention, a plurality of ventilation holes 12 are uniformly distributed on the upper end surface of the rotor housing 7 along the circumferential direction. When rotor casing 7 rotated, the air current can get into stator coil 6 through bleeder vent 12 inside and dispel the heat, greatly reduced stator coil 6's calorific capacity, reduced because overheated risk of burning out.

In another embodiment of the integrated brushless motor according to the present invention, a rotating shaft is provided in the ventilation hole 12, and a sealing adjustment plate 13 capable of sealing the ventilation hole 12 is provided on the rotating shaft. The air inlet angle and the air inlet amount can be changed by adjusting the angle of the closed adjusting plate 13; the air holes 12 can be sealed to avoid dust accumulation.

In another embodiment of the integrated brushless motor of the present invention, a fan impeller is provided on the motor shaft 5 inside the power cabin 9. When the motor shaft 5 rotates, the fan impeller synchronously rotates, so that the power supply cabin 9 generates flowing air flow to radiate the power supply integrated drive circuit board.

The lower part of the motor roller support 1 is provided with an opening, a bottom cover 14 is arranged on the opening, heat dissipation holes 16 are formed in the bottom cover 14, and the outer wall of the lower end of the motor roller support 1 is provided with a mounting connecting lug 15.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.