CN214900562U - Integrated high-voltage single-phase brushless motor - Google Patents
Integrated high-voltage single-phase brushless motor Download PDFInfo
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- CN214900562U CN214900562U CN202120890222.0U CN202120890222U CN214900562U CN 214900562 U CN214900562 U CN 214900562U CN 202120890222 U CN202120890222 U CN 202120890222U CN 214900562 U CN214900562 U CN 214900562U
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Abstract
The utility model provides an integrated high-voltage single-phase brushless motor, which comprises a shell, a high-voltage single-phase brushless motor winding, a driving circuit and an electrical interface unit, wherein a cavity is formed in the shell, and the high-voltage single-phase brushless motor winding, the driving circuit and the electrical interface unit are all arranged in the cavity, wherein the electrical interface unit is communicated with the outside and is used for realizing the electrical connection between the inside and the outside of the motor; the input end of the driving circuit is coupled with the electric interface unit, and the output end of the driving circuit is coupled with the high-voltage single-phase brushless motor winding and used for generating alternating-current voltage for driving the high-voltage single-phase brushless motor winding. The utility model discloses eliminated the long wire between drive circuit and the motor body and connected, shortened drive circuit, simplified system power supply design to a standardized interface is provided, makes the equipment wiring simpler, effective the cost is reduced has improved the reliability of motor simultaneously.
Description
Technical Field
The utility model relates to an industry automatic control technical field, concretely but not limited to relate to a single-phase brushless motor of high pressure of integration.
Background
The single-phase direct current brushless motor has the advantages of simple structure, low cost, less maintenance, high efficiency and easy control, and is widely applied to the field of low-voltage heat dissipation fans at present. For the field of high-voltage commercial power fans, a mature and cost-effective single-phase brushless motor system scheme is not available at present, however, a small number of manufacturers are producing high-voltage single-phase motor fans at present.
Unlike a conventional single-phase ac motor, a single-phase brushless motor needs to be equipped with a hall sensor and an electronic control circuit board or driver. The most common system scheme at present is to embed a hall circuit board with position signal detection inside a high-voltage single-phase brushless motor, as shown in fig. 1, and then connect with an external driving circuit board through a wire, and the driving circuit board provides interfaces such as an auxiliary power supply and a speed regulation signal which are interconnected with other modules. The conventional high-voltage single-phase brushless motor system scheme has the following problems: firstly, the wiring of system installation is complex, at least 5 long wires are arranged between a motor and a drive board, the wires comprise two motor wires and three Hall wires, and corresponding connectors are also arranged at two ends of the motor and the drive board; secondly, each type of motor needs to be matched or designed with a control panel again, so that the research and development cost of a system manufacturer is increased; third, the drive board and the motor body are separated, which is not conducive to EMC performance and hall signals are easily interfered.
The existing three-phase brushless motor system is structurally shown in fig. 2, the input end of the three-phase brushless motor system is direct current input and cannot be directly used for alternating current input, so that a direct current output adapter is needed, the three-phase integrated motor is complex in structure, a bridge arm and corresponding drive need to be added to a drive circuit, the hardware cost is higher, and the cost is not dominant.
SUMMERY OF THE UTILITY MODEL
To one or more problems among the prior art, the utility model provides a single-phase brushless motor of high pressure of integration through with drive circuit and electric interface integration inside single-phase brushless motor of high pressure, has eliminated the long wire between drive circuit and the motor and is connected to provide standardized interface, effectively the cost is reduced has improved the reliability of motor simultaneously.
Realize the utility model discloses the technical solution of purpose does:
an integrated high-voltage single-phase brushless motor comprises a high-voltage single-phase brushless motor, a driving circuit and an electrical interface, wherein the driving circuit and the electrical interface are embedded in the high-voltage single-phase brushless motor; the input end of the driving circuit is coupled with the electrical interface, and the output end of the driving circuit is coupled with the winding of the high-voltage single-phase brushless motor and used for generating alternating-current voltage for driving the high-voltage single-phase brushless motor.
Optionally, a through hole penetrating through the inside and the outside of the cavity is formed in a housing wall of the high-voltage single-phase brushless motor, and the electrical interface is communicated with the outside through the through hole.
Optionally, the electrical interface includes an ac mains power terminal and a speed regulation instruction signal terminal, the ac mains power terminal is used for accessing ac mains, and the speed regulation instruction signal terminal is used for accessing a motor speed regulation instruction.
Optionally, the electrical interface includes a motor state feedback signal output terminal for outputting a feedback signal of the current operation state of the motor.
Optionally, the electrical interface comprises an auxiliary power supply terminal for outputting an auxiliary power supply or supplying power to the drive circuit via an external power supply.
Optionally, the driving circuit includes a rectifying circuit, a filter circuit, an inverter circuit and a control unit, wherein:
the input end of the rectifying circuit is connected with external alternating voltage, and the output end of the rectifying circuit is connected with the filter circuit and used for converting the alternating voltage into direct voltage;
the input end of the filter circuit is connected with the direct-current voltage output by the rectification circuit, and the output end of the filter circuit is connected with the inverter circuit and used for filtering and smoothing the direct-current voltage;
the input end of the inverter circuit is connected with the smooth direct-current voltage output by the filter circuit, and the output end of the inverter circuit is connected with the driving voltage input end of the high-voltage single-phase brushless motor and used for inverting the direct-current voltage into chopped wave alternating-current voltage synchronous with a motor phase-changing signal;
the input end of the control unit is connected with an external speed regulating signal, and the output end of the control unit is connected with the switching tube of the inverter circuit and used for controlling the switching tube of the inverter circuit according to the speed regulating signal.
Optionally, the driving circuit includes an EMI filter module, and the EMI filter module is connected between the external ac voltage and the input end of the rectifying circuit, and is configured to suppress electromagnetic interference of the high-voltage high-frequency switch.
Optionally, the control unit is coupled to the high-voltage single-phase brushless motor and configured to obtain a hall commutation signal of the high-voltage single-phase brushless motor, and generate a gate-level driving signal according to the hall commutation signal to control a switching tube of the inverter circuit.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect:
1. the integrated high-voltage single-phase brushless motor has simple structure, eliminates the long wire connection between the motor body and the driving circuit, and makes the assembly wiring simpler;
2. the high-frequency chopping signal adopted by the integrated high-voltage single-phase brushless motor of the utility model greatly shortens the driving loop and better treats the EMI problem;
3. the utility model discloses a single-phase brushless motor of high pressure of integration provides standardized interface, reduces manufacturing cost, can externally provide supplementary power supply simultaneously, simplifies the power supply design of system.
Drawings
Fig. 1 is an electrical schematic diagram of a conventional high-voltage single-phase dc brushless motor;
fig. 2 is a schematic structural diagram of a conventional three-phase integrated motor.
Fig. 3 is a schematic diagram of an integrated high-voltage single-phase brushless motor according to an embodiment of the present invention;
fig. 4 is a structural diagram of an internal circuit of an integrated high-voltage single-phase brushless motor according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a driving circuit for a high-voltage single-phase brushless motor according to an embodiment of the present invention;
fig. 6 is a waveform diagram illustrating the operation of an integrated high-voltage single-phase brushless motor according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an integrated high-voltage single-phase brushless motor according to an embodiment of the present invention;
fig. 8 is a sectional view of an integrated high-voltage single-phase brushless motor according to an embodiment of the present invention.
The same reference numbers in different drawings identify the same or similar elements or components.
Detailed Description
For further understanding of the present invention, preferred embodiments of the present invention will be described below with reference to examples, but it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the claims of the present invention.
The description in this section is for exemplary embodiments only, and the present invention is not limited to the scope of the embodiments described. Combinations of different embodiments, or technical features of different embodiments, or similar prior art means, or technical features of embodiments, may be substituted for each other within the scope of the present invention.
The term "coupled" or "connected" in this specification includes both direct and indirect connections. An indirect connection is a connection made through an intermediate medium, such as a conductor, wherein the electrically conductive medium may contain parasitic inductance or parasitic capacitance, or through an intermediate circuit or component as described in the embodiments in the specification; indirect connections may also include connections through other active or passive devices that perform the same or similar function, such as connections through switches, signal amplification circuits, follower circuits, and so on. "plurality" or "plurality" means two or more.
According to an aspect of the present invention, an integrated high-voltage single-phase brushless motor, including high-voltage single-phase brushless motor 1, driving circuit 2 and electrical interface 3, as shown in fig. 7 and 8, driving circuit 2 and electrical interface 3 are embedded in high-voltage single-phase brushless motor 1. As shown in fig. 4, the electrical interface 3 is communicated with the outside, the input end is connected to an external electrical signal, and the output end is connected to the input end of the driving circuit 2, so as to realize the electrical connection between the inside and the outside of the motor; the input end of the driving circuit 2 is coupled to the electrical interface 3, and the output end is coupled to the winding of the high-voltage single-phase brushless motor 1, for generating an ac voltage for driving the high-voltage single-phase brushless motor 1.
In one embodiment, the power output end of the integrated high-voltage single-phase brushless motor is connected with a high-voltage commercial fan, so that the fan blades can be driven to rotate.
In one embodiment, the housing wall has a through hole penetrating the inside and outside of the cavity, and the electrical interface 3 is communicated with the outside through the through hole.
In one embodiment, the driving circuit 2 includes a rectifying circuit 21, a filtering circuit 22, an inverter circuit 23, and a control unit 24. Wherein: the input end of the rectifying circuit 21 is connected to an external alternating voltage, and the output end is connected to the filter circuit 22, and is used for converting the alternating voltage into a direct voltage and outputting the direct voltage. The input end of the filter circuit 22 is connected to the dc voltage output by the rectifier circuit 21, and the output end is connected to the inverter circuit 23, for filtering and smoothing the dc voltage and outputting the smoothed dc voltage. The input end of the inverter circuit 23 is connected to the smooth dc voltage output by the filter circuit 22, and the output end is connected to the input end of the driving voltage of the high-voltage single-phase brushless motor, for inverting the smooth dc voltage into a chopped ac voltage synchronized with the phase-change signal of the motor and outputting the chopped ac voltage. In one embodiment, the input end of the control unit 24 is connected to an external speed-regulating signal, and the output end is connected to the switching tube of the inverter circuit 23, and is configured to generate a control signal according to the speed-regulating signal to control the switching tube of the inverter circuit 23, so as to control the rotation speed of the motor. In another embodiment, the input terminal of the control unit 24 is connected to an external speed regulation signal and a hall commutation signal of the high-voltage single-phase brushless motor, and the output terminal is coupled to the switching tube of the inverter circuit 23, and generates a gate-level driving signal to control the switching tube of the inverter circuit 23 according to the speed regulation signal and the hall commutation signal.
In one embodiment, the rectifying circuit 21 includes a bridge rectifier, the bridge rectifier includes four diodes D1-D4, two input terminals of the bridge rectifier are respectively connected to a live wire signal and a neutral wire signal of the high-voltage alternating current, and one output terminal of the bridge rectifier is grounded.
In one embodiment, the filter circuit 22 includes a filter capacitor C1, and two ends of the filter capacitor C1 are respectively connected to the output end of the rectifier circuit 21, wherein one end is grounded.
In one embodiment, the inverter circuit 23 includes a single-phase H-bridge inverter circuit, four legs of the single-phase H-bridge inverter circuit each include a controllable switching tube Q1-Q4 and a diode connected in parallel, each two legs are connected in series to form a series-connected leg, two series-connected legs are connected in parallel, an input end is that two ends of the series-connected legs are respectively coupled to an output end of the filter circuit, one of the input ends is grounded, two output ends are respectively a middle point of the two series-connected legs, and the output ends are respectively coupled to a driving voltage input end of the high-voltage single-phase brushless motor.
In another embodiment, the driving circuit 2 includes a rectifying circuit 21, a filter circuit 22, an inverter circuit 23, a control unit 24, and an EMI filter module 25, an input terminal of the EMI filter module 25 is coupled to the external ac voltage, and an output terminal thereof is coupled to an input terminal of the rectifying circuit 21, for suppressing electromagnetic interference of the high-voltage ac power. The output end of the rectifying circuit 21 is coupled with the filter circuit 22, the output end of the filter circuit 22 is coupled with the inverter circuit 23, and the output end of the inverter circuit 23 is coupled with the high-voltage single-phase brushless motor. In one embodiment, the control unit 24 has an input coupled to the external speed-adjusting signal and an output coupled to the switching tube of the inverter circuit 23. In another embodiment, the control unit 24 further receives a hall commutation signal of the high-voltage single-phase brushless motor, and generates gate-level driving signals G1-G4 to control the controllable switching tubes Q1-Q4 of the inverter circuit 23 according to the hall commutation signal.
In one embodiment, the electrical interface comprises an ac mains power terminal and a speed regulation command signal terminal, the ac mains power terminal is used for accessing ac mains, and the speed regulation command signal terminal is used for accessing a motor speed regulation command. In another embodiment, the electrical interface further comprises a motor state feedback signal output terminal for outputting a feedback signal of the current operating state of the motor. In another embodiment, the electrical interface further comprises an auxiliary power supply terminal for outputting an auxiliary power supply or supplying power to the drive circuit via an external power supply.
In another embodiment, the electrical interface 3 includes a high voltage ac input terminal, a signal reference terminal, an auxiliary power supply terminal, a speed regulation signal input terminal, and a motor state feedback signal output terminal. The high-voltage alternating current input terminal comprises a live wire terminal ACL and a zero line terminal ACN and is used for being connected with a live wire and a zero line of high-voltage alternating current to access alternating voltage. The signal reference terminal GND is used for connection to ground to reference a base point with a voltage. The auxiliary power supply terminal VCC is used to supply auxiliary power to the outside or to supply power to the drive circuit 2 via an external power supply. The speed regulating signal input terminal PWM is used for accessing a set or regulated rotating speed signal of the high-voltage single-phase brushless motor. And the motor state feedback signal output terminal FG is used for externally providing a current state signal of the motor.
In another embodiment, the electrical interface 3 comprises two high voltage ac input terminals, including a live terminal ACL and a neutral terminal CAN, a signal reference terminal GND, an auxiliary power supply terminal VCC, a speed regulation signal input terminal PWM and a motor status feedback signal output terminal FG. In one embodiment, one end of the high voltage ac input terminal is connected to the live line and the neutral line of the high voltage ac power, respectively, and the other end is coupled to the rectifying circuit 21 in the driving circuit. In another embodiment, the high voltage ac input terminal is connected to the line and neutral conductors of the high voltage ac power at one end and coupled to the EMI filter 25 in the driving circuit 2 at the other end. One end of the signal reference terminal GND is connected to the ground, and the other end is coupled to the ground terminal in the driving circuit 2. One end of the auxiliary power supply terminal VCC is connected to an auxiliary power supply or a load, and the other end is coupled to the control unit 24 in the driving circuit 2, and is used for providing auxiliary power to the outside or supplying power to the control unit 24 in the driving circuit 2 via an external power supply. One end of the speed regulation signal input terminal PWM is connected to an external motor rotation speed signal input terminal, and the other end is coupled to the control unit 24 in the drive circuit 2. One end of the motor state feedback signal output terminal FG is connected to an external device, and the other end is coupled to the control unit 24 in the drive circuit 2.
As shown in fig. 6, according to the working waveform diagram of the integrated high-voltage single-phase brushless motor of the present invention, the control unit 24 generates gate-level driving signals G1-G4 to control the switching tubes Q1-Q4 of the inverter circuit 23 according to the Hall commutation signal Hall of the motor, so that the differential pressure generated by the middle points of the two arms is usIs applied to the motor, interacts with the back emf E of the motor to generate a current isAnd producing electromagnetic torque to drive the motor to run.
The utility model discloses a driving method of high-pressure single-phase brushless motor of integration as follows:
converting the alternating voltage into direct voltage, filtering and smoothing the direct voltage, and outputting the direct voltage to an inverter circuit;
the inverter circuit inverts the smoothed direct-current voltage into alternating-current voltage synchronous with a motor phase-changing signal and outputs the alternating-current voltage, and a switching tube of the inverter circuit is controlled by the control unit;
and applying alternating voltage to the high-voltage single-phase brushless motor to drive the motor to run.
Those skilled in the art should understand that the logic controls such as "high" and "low", "set" and "reset", "and gate" and "or gate", "non-inverting input" and "inverting input" in the logic controls referred to in the specification or the drawings may be exchanged or changed, and the subsequent logic controls may be adjusted to achieve the same functions or purposes as the above-mentioned embodiments.
The description and applications of the present invention are illustrative and are not intended to limit the scope of the invention to the embodiments described above. The descriptions related to the effects or advantages in the specification may not be reflected in practical experimental examples due to uncertainty of specific condition parameters or influence of other factors, and the descriptions related to the effects or advantages are not used for limiting the scope of the invention. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the present invention.
Claims (8)
1. An integrated high-voltage single-phase brushless motor is characterized by comprising a high-voltage single-phase brushless motor, a driving circuit and an electrical interface, wherein the driving circuit and the electrical interface are embedded in the high-voltage single-phase brushless motor; the input end of the driving circuit is coupled with the electrical interface, and the output end of the driving circuit is coupled with the winding of the high-voltage single-phase brushless motor and used for generating alternating-current voltage for driving the high-voltage single-phase brushless motor.
2. The integrated high-voltage single-phase brushless motor according to claim 1, wherein a housing wall of the high-voltage single-phase brushless motor is provided with a through hole penetrating through the housing, and the electrical interface is communicated with the outside through the through hole.
3. The integrated high-voltage single-phase brushless motor according to claim 1, wherein the electrical interface comprises an ac mains power terminal and a speed regulation command signal terminal, the ac mains power terminal is used for accessing ac mains, and the speed regulation command signal terminal is used for accessing a motor speed regulation command.
4. The integrated high-voltage single-phase brushless motor according to claim 1 or 3, wherein the electrical interface comprises a motor state feedback signal output terminal for outputting a feedback signal of a current operation state of the motor.
5. The integrated high-voltage single-phase brushless motor according to claim 1 or 3, wherein the electrical interface includes an auxiliary power supply terminal for outputting an auxiliary power supply or supplying power to the drive circuit via an external power supply.
6. The integrated high-voltage single-phase brushless motor according to claim 1, wherein the driving circuit comprises a rectifying circuit, a filter circuit, an inverter circuit, and a control unit, wherein:
the input end of the rectifying circuit is connected with external alternating voltage, and the output end of the rectifying circuit is connected with the filter circuit and used for converting the alternating voltage into direct voltage;
the input end of the filter circuit is connected with the direct-current voltage output by the rectification circuit, and the output end of the filter circuit is connected with the inverter circuit and used for filtering and smoothing the direct-current voltage;
the input end of the inverter circuit is connected with the smooth direct-current voltage output by the filter circuit, and the output end of the inverter circuit is connected with the driving voltage input end of the high-voltage single-phase brushless motor and used for inverting the direct-current voltage into chopped wave alternating-current voltage synchronous with a motor phase-changing signal;
the input end of the control unit is connected with an external speed regulating signal, and the output end of the control unit is connected with the switching tube of the inverter circuit and used for controlling the switching tube of the inverter circuit according to the speed regulating signal.
7. The integrated high-voltage single-phase brushless motor according to claim 6, wherein the driving circuit comprises an EMI filter module connected between an external AC voltage and an input terminal of the rectifying circuit for suppressing electromagnetic interference of the high-voltage high-frequency switch.
8. The integrated high-voltage single-phase brushless motor according to claim 6, wherein the control unit is coupled to the high-voltage single-phase brushless motor, and configured to obtain a hall commutation signal of the high-voltage single-phase brushless motor, and generate a gate-level driving signal to control the switching tube of the inverter circuit according to the hall commutation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120890222.0U CN214900562U (en) | 2021-04-27 | 2021-04-27 | Integrated high-voltage single-phase brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120890222.0U CN214900562U (en) | 2021-04-27 | 2021-04-27 | Integrated high-voltage single-phase brushless motor |
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| Publication Number | Publication Date |
|---|---|
| CN214900562U true CN214900562U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120890222.0U Active CN214900562U (en) | 2021-04-27 | 2021-04-27 | Integrated high-voltage single-phase brushless motor |
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| CN (1) | CN214900562U (en) |
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2021
- 2021-04-27 CN CN202120890222.0U patent/CN214900562U/en active Active
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