CN119492135A - DC motor assembly of constant-speed air conditioner external unit and constant-speed air conditioner external unit - Google Patents
DC motor assembly of constant-speed air conditioner external unit and constant-speed air conditioner external unit Download PDFInfo
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- CN119492135A CN119492135A CN202311028671.4A CN202311028671A CN119492135A CN 119492135 A CN119492135 A CN 119492135A CN 202311028671 A CN202311028671 A CN 202311028671A CN 119492135 A CN119492135 A CN 119492135A
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- power supply
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- air conditioner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
本发明公开一种定速空调外机的直流电机组件及定速空调外机，该定速空调外机的直流电机组件包括：直流电机本体；输入接口，用于接入市电；电源模块，所述电源模块的输入端与所述输入接口连接，所述电源模块用于将接入的市电转换为直流电源后输出；驱动模块，所述驱动模块的电源输入端与所述电源模块的输出端连接，所述驱动模块的输出端与所述直流电机连接，所述驱动模块用于将所述直流电源转换为驱动电源后输出至所述直流电机本体，以驱动所述直流电机本体以预定转速进行工作。本发明可以解决定速空调外机容易受输入电源影响的问题。
The present invention discloses a DC motor component of a constant-speed air conditioner outdoor unit and the constant-speed air conditioner outdoor unit. The DC motor component of the constant-speed air conditioner outdoor unit comprises: a DC motor body; an input interface for connecting to a mains power supply; a power module, the input end of the power module is connected to the input interface, the power module is used to convert the connected mains power into a DC power supply and then output it; a drive module, the power input end of the drive module is connected to the output end of the power module, the output end of the drive module is connected to the DC motor, the drive module is used to convert the DC power supply into a drive power supply and then output it to the DC motor body, so as to drive the DC motor body to work at a predetermined speed. The present invention can solve the problem that the constant-speed air conditioner outdoor unit is easily affected by the input power supply.
Description
Technical Field
The invention relates to the technical field of constant-speed air conditioners, in particular to a direct current motor component of an outer machine of a constant-speed air conditioner and the outer machine of the constant-speed air conditioner.
Background
Most of the current constant-speed air conditioner outdoor units are not provided with an electric control board, so that the outdoor fan motors of the constant-speed air conditioner are basically alternating-current asynchronous motors, and the zero and live wires of an alternating-current power supply are directly connected to terminals of the alternating-current motors. However, the technical scheme that the current constant-speed machine outdoor motor uses an alternating current asynchronous motor has a plurality of defects, the rotating speed of the alternating current motor is not controlled in a closed loop mode, the rotating speed is easily influenced by fluctuation of mains supply, meanwhile, unstable mains supply easily causes over-tolerance of temperature rise of the motor to cause action of a protector, and the machine is jumped to stop. And because the torque curve characteristic of the single asynchronous alternating current motor, the high-efficiency rotating speed range of the alternating current motor is very narrow, the highest efficiency is limited, the highest efficiency of a 50HZ motor is generally 50-65%, the highest efficiency of a 60HZ motor is generally 40-55%, the highest rotating speed is influenced by the slip of the alternating current motor and is generally set within 900rpm, and therefore the energy efficiency of the whole machine is greatly influenced by the input power and the rotating speed of the alternating current motor.
Disclosure of Invention
The invention mainly aims to provide a direct current motor component of a constant-speed air conditioner external unit, and aims to solve the problem that the constant-speed air conditioner external unit is easily affected by an input power supply.
In order to achieve the above object, the present invention provides a dc motor assembly for a constant speed air conditioner external unit, comprising:
A DC motor body;
The input interface is used for accessing the commercial power;
The input end of the power supply module is connected with the input interface, and the power supply module is used for converting the accessed commercial power into a direct current power and outputting the direct current power;
The driving module is used for converting the direct current power supply into a driving power supply and then outputting the driving power supply to the direct current motor body so as to drive the direct current motor body to work at a preset rotating speed.
Optionally, the driving module and the power module are integrally disposed in the dc motor body.
Optionally, the direct current motor body comprises a casing and an end cover matched with the casing, and the end cover is matched with the casing to form a containing cavity;
the driving module and the power module are arranged on the surface of one side of the end cover, which is close to the shell.
Optionally, the driving module further has a first power supply end and a second power supply end;
The first power supply output end of the power supply module is connected with the first power supply end of the driving module, the second power supply output end of the power supply module is connected with the second power supply end of the driving module, and the power supply module is further used for converting the accessed mains supply into a first power supply and outputting the first power supply power from the first power supply output end, and converting the accessed mains supply into a second power supply and outputting the second power supply power from the second power supply output end so as to supply power for the driving module.
Optionally, the driving module includes:
the input end of the motor driving circuit is connected with the output end of the power supply module, and the motor driving circuit is used for converting the direct-current power supply into a driving power supply and outputting the driving power supply to the direct-current motor body so as to drive the direct-current motor body to work at a preset rotating speed;
The control end of the control circuit is connected with the controlled end of the motor driving circuit, and the control circuit is used for controlling the motor driving circuit to convert the direct current power supply into a driving power supply and then output the driving power supply to the direct current motor so as to drive the direct current motor body to work at a preset rotating speed.
Optionally, the power module includes:
The input end of the rectifying circuit is connected with the input interface, and the rectifying circuit is used for converting the accessed alternating current commercial power into a direct current power supply and outputting the direct current power supply;
The input end of the switching power supply circuit is connected with the output end of the rectifying circuit, the output end of the switching power supply circuit is connected with the power supply end of the motor driving circuit, and the switching power supply circuit is used for converting the direct current power supply into a first power supply and then outputting the first power supply to supply power for the motor driving circuit;
the input end of the voltage stabilizing circuit is connected with the output end of the switching power supply circuit, the output end of the voltage stabilizing circuit is connected with the power supply end of the control circuit, and the voltage stabilizing circuit is used for converting the first power supply into the second power supply and then outputting the second power supply so as to supply power for the control circuit.
Optionally, the direct current motor component of the constant speed air conditioner external unit further comprises:
And the bus voltage sampling circuit is electrically connected with the power supply module and is used for detecting the DC bus voltage and outputting a corresponding voltage detection signal to the driving module so that the driving module drives the DC motor to work/stop working according to the voltage detection signal.
Optionally, the direct current motor component of the constant speed air conditioner external unit further comprises:
The current sampling circuit is electrically connected with the driving module and is used for detecting the output current of the driving module and outputting a corresponding current detection signal to the driving module so that the driving module drives the direct current motor to work/stop working according to the current detection signal.
Optionally, the direct current motor component of the constant speed air conditioner external unit further comprises:
The temperature sampling circuit is electrically connected with the driving module and is used for detecting the working temperature of the direct current motor body and outputting a corresponding temperature detection signal to the driving module so that the driving module drives the direct current motor to work/stop working according to the temperature detection signal.
The invention also provides a constant-speed air conditioner external unit, which comprises the direct current motor component of the constant-speed air conditioner external unit.
According to the technical scheme, the direct current motor is used for replacing an alternating current motor in the existing air conditioner external unit, and the direct current motor is driven to work at the preset rotating speed, so that the external power supply fluctuation cannot influence the operation of the motor at the set rotating speed, and the stability of the constant speed air conditioner external unit is improved. And because the motor is a direct-current motor body, the efficiency is completely equal to the consistent efficiency of the frequency converter type motor and is even higher, so that the motor efficiency is greatly improved. In addition, although the material cost of the power supply module and the driving module of the constant-speed direct current motor is equivalent to or slightly higher than that of the alternating current motor, the input power is obviously reduced due to the great improvement of the motor efficiency, and the cost of driving related materials such as an evaporator, a condenser and a compressor is reduced, so that the overall cost of the whole machine is greatly reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of an embodiment of a DC motor assembly of a constant speed air conditioner external unit according to the present invention;
FIG. 2 is a schematic diagram of a functional module of another embodiment of a DC motor assembly of a constant speed air conditioner external unit according to the present invention;
FIG. 3 is a schematic circuit diagram of a motor driving circuit of an external unit of a constant speed air conditioner according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a control circuit of an outdoor unit of a constant speed air conditioner according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a rectifying circuit of an outdoor unit of a constant-speed air conditioner according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of a switching power supply circuit of an external unit of a constant speed air conditioner according to an embodiment of the present invention;
FIG. 7 is a schematic circuit diagram of an embodiment of a voltage stabilizing circuit of a constant speed air conditioner according to the present invention;
FIG. 8 is a schematic circuit diagram of an embodiment of a bus voltage sampling circuit of a constant speed air conditioner external unit according to the present invention;
FIG. 9 is a schematic circuit diagram of an embodiment of a current sampling circuit of an outdoor unit of a constant-speed air conditioner according to the present invention;
Fig. 10 is a schematic circuit diagram of an embodiment of an overcurrent protection circuit of a constant-speed air conditioner according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Driving module | 11 | Motor driving circuit |
| 20 | Power supply module | 12 | Control circuit |
| 30 | Bus voltage sampling circuit | 21 | Rectifying circuit |
| 40 | Current sampling circuit | 22 | Switching power supply circuit |
| 50 | Temperature sampling circuit | 23 | Voltage stabilizing circuit |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear are referred to in the embodiments of the present invention), the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
At present, most of the current constant-speed air conditioner outdoor units are not provided with an electric control board, so that the outdoor fan motors of the constant-speed air conditioner are basically alternating-current asynchronous motors, and zero and live wires of an alternating-current power supply are directly connected to terminals of the alternating-current motors. However, the technical solution of using an ac asynchronous motor for the outdoor motor of the current constant speed machine mainly has the following disadvantages:
1, the temperature rise of the rotating speed is unstable, namely the rotating speed of an alternating current motor is not controlled in a closed loop manner, the rotating speed is easily influenced by fluctuation of the mains supply, meanwhile, the unstable mains supply easily causes the temperature rise of the motor to be out of tolerance, so that a protector acts, and the machine jumps and stops.
2, The efficiency is low-because of the torque curve characteristic of a single asynchronous alternating current motor, the high-efficiency rotating speed range of the alternating current motor is narrow, the highest efficiency is limited, the highest efficiency of a 50HZ motor is 50-65%, the highest efficiency of a 60HZ motor is 40-55%, the highest rotating speed is influenced by the slip of the alternating current motor and is generally set within 900rpm, and therefore the energy efficiency of the whole machine is greatly influenced by the input power and the rotating speed of the alternating current motor.
3, The cost is high, and in order to meet the capability and energy efficiency requirements of the constant-speed air conditioner, particularly the middle east area, the number of evaporator rows of the constant-speed air conditioner is very large, and the materials of the alternating current motor are very large.
In order to solve the above-mentioned problems, the present invention provides a dc motor assembly of a constant-speed air conditioner external unit, referring to fig. 1 to 3, in an embodiment, the dc motor assembly of the constant-speed air conditioner external unit includes:
A DC motor body;
the input interface is used for accessing to the commercial power to supply power for the direct current motor body;
the input end of the power supply module 20 is connected with the input interface, and the power supply module 20 is used for converting the accessed commercial power into a direct current power and outputting the direct current power;
The driving module 10, the power input end of driving module 10 with the output end of power module 20 is connected, the output end of driving module 10 with direct current motor is connected, driving module 10 is used for with direct current power supply is output after driving power supply is converted to the direct current motor body, in order to drive the direct current motor body carries out work with predetermined rotational speed.
In this embodiment, the dc motor may be a permanent magnet dc motor, a separately excited dc motor, a self-excited dc motor, or the like, and is configured to convert electric energy into mechanical energy to drive a fan in the external unit of the constant-speed air conditioner to rotate. The direct current motor body can be composed of a casing, an end cover, a stator, a rotor, a rotating shaft and the like, wherein the casing and the end cover can be matched and fixedly installed in a mode of screws, buckles or clamping grooves and the like, so that a housing of the motor is formed, a containing cavity is formed in the housing for containing the stator, the rotor, the rotating shaft and the like of the motor, when current passes through the rotor to generate a magnetic field and interacts with the magnetic field of the stator, torque is generated, the motor is enabled to rotate, and the rotating speed and the steering control of the direct current motor can be realized by controlling the size and the direction of the current of the rotor. The driving module 10 may be composed of a motor driving circuit 11 and a control circuit 12 for controlling the motor driving circuit 11, where the motor driving circuit 11 can convert the dc power outputted by the power module 20 into a driving power and output the driving power to the dc motor body, so as to drive the dc motor to work, and thus convert the dc motor electric energy into mechanical energy to drive the fan in the constant-speed air conditioner outdoor unit to rotate. The power module 20 may be composed of a rectifying circuit 21, and the power module 20 can convert the connected ac mains supply into a dc power supply and output the dc power to the driving module 10. In addition, a corresponding DC-DC conversion circuit or LDO voltage stabilizing circuit 23 may be further disposed in the power module 20, so as to convert the DC power into a power supply with smaller voltage, so as to supply power to the IPM module or the MCU in the driving module 10.
It should be noted that, in the present embodiment, the driving module 10 is configured to drive the dc motor body to operate at a predetermined rotational speed, that is, the dc motor rotates at the predetermined rotational speed, that is, the constant speed, where the predetermined rotational speed may be set according to the energy efficiency of the air conditioner or the requirement of the user. It can be understood that the direct current motor is set to work at a constant speed, so that the rotating speed of the direct current motor cannot be influenced by fluctuation of an external power supply, and the stability of the constant speed air conditioner external unit is improved.
According to the technical scheme, the direct current motor is used for replacing an alternating current motor in the existing air conditioner external unit, and the direct current motor is driven to work at the preset rotating speed, so that the external power supply fluctuation cannot influence the operation of the motor at the set rotating speed, and the stability of the constant speed air conditioner external unit is improved. And because the motor is a direct-current motor body, the efficiency is completely equal to the consistent efficiency of the frequency converter type motor and is even higher, so that the motor efficiency is greatly improved. In addition, although the power module 20 and the driving module 10 of the constant-speed direct current motor are newly designed, the material cost is equivalent to or slightly higher than that of the alternating current motor, the input power is obviously reduced due to the great improvement of the motor efficiency, and the cost of driving related materials such as an evaporator, a condenser and a compressor is reduced, so that the overall cost of the whole machine is greatly reduced.
Referring to fig. 1 to 3, in an embodiment, the driving module 10 and the power module 20 are integrally disposed in the dc motor body.
It can be understood that the outdoor fan motor in the existing constant-speed air conditioner external unit is basically an alternating current asynchronous motor, the zero and live wire of the alternating current power supply is directly communicated to the terminal of the alternating current motor, and the alternating current commercial power is directly supplied to drive the alternating current motor to work, so that the existing constant-speed air conditioner external unit is not provided with an electric control board, the rotating speed of the alternating current motor is free from closed-loop control, and the rotating speed is easily influenced by fluctuation of the commercial power.
In this embodiment, the ac motor is replaced by the dc motor, and an electric control unit is required to control the rotational speed of the dc motor, so that the dc motor rotates at a constant speed. Therefore, the driving module 10 and the power module 20 can be integrated in the direct current motor body, that is, the direct current motor has no electric control part outside, so that the constant speed air conditioner external unit does not need to be provided with an electric control board. It can be understood that when the driving module 10 and the power module 20 are integrated inside the dc motor, the input terminal of the dc motor can be used as an input interface to be connected to the mains supply, and the driving module 10 and the power module 20 inside the motor can convert the mains supply into a driving power to drive the motor to work. So set up, under the inside integrated power module 20 of motor and the condition of drive module 10 and motor body, direct external power zero live wire can be according to the steady high-efficient operation of rotational speed of settlement, can reach the same efficiency and rotational speed of converter type direct current motor, can accomplish again and need not external automatically controlled just the effect of circular telegram operation, promote the energy efficiency and the comprehensive cost and the product competitiveness of constant speed model greatly. In addition, the AC motor used by the existing constant-speed air conditioner external unit is more likely to generate double-frequency noise and electromagnetic abnormal noise due to the harmonic interference of the mains supply and the limitation of an electromagnetic scheme, especially a 60HZ model, while the AC motor is replaced by the DC motor, and the power supply module 20 and the driving module 10 are integrated in the DC motor, so that the interference of the harmonic wave of the mains supply and the like can be reduced, and especially the inherent peak noise of the double-frequency and the like of the AC motor can be thoroughly solved.
Optionally, the direct current motor body comprises a casing and an end cover matched with the casing, and the end cover is matched with the casing to form a containing cavity;
the driving module 10 and the power module 20 are disposed on a surface of the end cover, which is close to the casing.
In an embodiment, the housing of the direct current motor can be divided into a casing and an end cover, and the casing and the end cover can be matched and fixedly installed in a screw, a buckle or a clamping groove and the like, so that the housing of the motor is formed, and a containing cavity is formed inside the housing for containing a stator, a rotor, a rotating shaft and the like of the motor. The driving module 10 and the power module 20 are arranged on one side surface of the end cover, which is close to the shell, namely, on the inner surface of the end cover, so that the driving module 10 and the power module 20 are arranged in the motor shell, so that the motor can be directly externally connected with a power zero live wire to stably and efficiently operate according to the set rotating speed, the same energy efficiency and rotating speed of the frequency converter type direct current motor can be achieved, the effect of electrifying operation without external electric control can be achieved, and the energy efficiency, the comprehensive cost and the product competitiveness of a constant speed machine type are greatly improved. In addition, the AC motor used by the existing constant-speed air conditioner external unit is more likely to generate double-frequency noise and electromagnetic abnormal noise due to the harmonic interference of the mains supply and the limitation of an electromagnetic scheme, especially a 60HZ model, while the AC motor is replaced by the DC motor, and the power supply module 20 and the driving module 10 are integrated in the DC motor, so that the interference of the harmonic wave of the mains supply and the like can be reduced, and especially the inherent peak noise of the double-frequency and the like of the AC motor can be thoroughly solved.
Referring to fig. 1 to 3, in an embodiment, the driving module 10 further has a first power supply terminal and a second power supply terminal;
The first power supply output end of the power supply module 20 is connected with the first power supply end of the driving module 10, the second power supply output end of the power supply module 20 is connected with the second power supply end of the driving module 10, and the power supply module 20 is further configured to convert the accessed mains supply into a first power supply and output the first power supply output end, and convert the accessed mains supply into a second power supply and output the second power supply output end, so as to supply power to the driving module 10.
In this embodiment, the power module 20 is configured to provide a DC power supply for the driving module 10, and is further configured to provide a first power supply and a second power supply for the driving module 10, where the power module 20 may include a rectifying circuit 21, a DC-DC conversion circuit, and a voltage stabilizing circuit 23, where the rectifying circuit 21 is configured to provide the DC power supply for the driving module 10, so that an inversion portion in the driving module 10 converts the DC power supply into a driving power to drive the motor to work, and the DC-DC conversion circuit and the voltage stabilizing circuit 23 are configured to convert the DC power supply into the first power supply and the second power supply, so as to provide a working power for an IPM module or an MCU in the driving module 10, so that the driving module 10 can drive the motor to work.
Referring to fig. 1 to 3, in an embodiment, the driving module 10 includes:
The input end of the motor driving circuit 11 is connected with the output end of the power module 20, and the motor driving circuit 11 is used for converting the direct current power supply into a driving power supply and outputting the driving power supply to the direct current motor body so as to drive the direct current motor body to work at a preset rotating speed;
The control circuit 12, the control end of the control circuit 12 is connected with the controlled end of the motor driving circuit 11, the control circuit 12 is used for controlling the motor driving circuit 11 to convert the direct current power supply into a driving power supply and then output the driving power supply to the direct current motor so as to drive the direct current motor body to work at a preset rotating speed.
In this embodiment, the motor driving circuit 11 may be formed by an IPM module or an inverter circuit, etc., and is configured to convert a dc power source into a driving power source and output the driving power source to the dc motor to drive the motor to work, the control circuit 12 may be implemented by a microprocessor such as CPLD, FPGA, MCU, etc., and the control circuit 12 is configured to output a corresponding control signal to control the motor driving circuit 11 to work. It will be appreciated that the control circuit 12 may output a certain PWM signal according to the actual application requirement, so as to control the motor driving circuit 11 to output a fixed driving power source, and further drive the motor to operate at a predetermined rotational speed. Referring to fig. 3 and 4, fig. 3 is a schematic circuit diagram of an embodiment of a motor driving circuit, where the motor driving circuit 11 is composed of an IPM chip and is configured to convert a dc power supply into a driving power supply and output the driving power supply to a dc motor to drive the motor to work. Fig. 4 is a schematic circuit diagram of an embodiment of the control circuit 12, where the control circuit 12 is composed of an MCU and a peripheral circuit, and is configured to output a corresponding PWM control signal to control the motor driving circuit 11 to operate.
In one embodiment, the power module 20 includes:
The input end of the rectifying circuit 21 is connected with the input interface, and the rectifying circuit 21 is used for converting the accessed alternating current commercial power into a direct current power supply and outputting the direct current power supply;
The input end of the switching power supply circuit 22 is connected with the output end of the rectifying circuit 21, the output end of the switching power supply circuit 22 is connected with the power supply end of the motor driving circuit 11, and the switching power supply circuit 22 is used for converting the direct current power supply into a first power supply and outputting the first power supply to supply power for the motor driving circuit 11;
The input end of the voltage stabilizing circuit 23 is connected with the output end of the switching power supply circuit 22, the output end of the voltage stabilizing circuit 23 is connected with the power supply end of the control circuit 12, and the voltage stabilizing circuit 23 is used for converting the first power supply into the second power supply and then outputting the second power supply to supply power for the control circuit 12.
In this embodiment, the rectifying circuit 21 is configured to rectify the connected ac mains supply into a DC power supply, and output the DC power supply to the motor driving circuit 11 and the switching power supply circuit 22, where the switching power supply circuit 22 may be implemented by using a DC-DC conversion circuit, a buck circuit, or the like, and the switching power supply circuit 22 may convert the DC power supply output by the rectifying circuit 21 into a first power supply to supply power to the motor driving circuit 11 of the driving module 10. The voltage stabilizing circuit 23 may be implemented by an LDO chip, etc., and is configured to convert the first power supply output by the switching power supply circuit 22 into the second power supply to supply power to the control circuit 12 of the driving module 10. Referring to fig. 5 to 7, fig. 5 is a schematic circuit diagram of an embodiment of a rectifying circuit, where the rectifying circuit 21 is composed of a resistor, a capacitor, a transformer, and other devices, and is configured to rectify AC220V mains power into DC310V voltage, and output the DC310V voltage to the switching power supply circuit 22. Fig. 6 is a schematic circuit diagram of an embodiment of a switching power supply circuit, where the switching power supply circuit 22 is formed by discrete devices such as a switching power supply chip, a capacitor, a resistor, and a diode, and is configured to convert a DC310V voltage output from the rectifying circuit 21 into a DC 15V regulated output, so as to provide a first power supply for the motor driving circuit 11 and the voltage stabilizing circuit 23 of the driving module 10. Fig. 7 is a schematic circuit diagram of an embodiment of a voltage stabilizing circuit, in which the voltage stabilizing circuit 23 is implemented by using an LDO voltage stabilizing chip, and is configured to convert the dc 15V voltage output by the switching power supply circuit 22 into a 3.3V voltage to supply power to the control circuit 12 of the driving module 10.
Referring to fig. 1 to 3, in an embodiment, the dc motor assembly of the constant speed air conditioner external unit further includes:
And a bus voltage sampling circuit 30, wherein the bus voltage sampling circuit 30 is electrically connected with the power module 20, and the bus voltage sampling circuit 30 is configured to detect a dc bus voltage and output a corresponding voltage detection signal to the driving module 10, so that the driving module 10 drives the dc motor to operate/stop operating according to the voltage detection signal.
In this embodiment, the bus voltage sampling circuit 30 may select a resistor voltage division or a series resistor to realize voltage collection, where the bus voltage sampling circuit 30 can collect dc bus voltage and output a corresponding voltage detection signal to the control circuit 12 in the driving module 10, so that the driving module 10 can determine the bus voltage, and thus drive the dc motor to work or stop working according to the bus voltage, so as to realize functions such as overvoltage protection or undervoltage protection. For example, when the driving module 10 determines that the bus voltage is greater than 420V for two milliseconds through the voltage detection signal, the driving dc motor is stopped to implement the overvoltage protection, or when the driving module 10 determines that the bus voltage is less than 100V for two milliseconds through the voltage detection signal, the driving dc motor is stopped to implement the undervoltage protection. Referring to fig. 8, fig. 8 is a schematic circuit diagram of an embodiment of a bus voltage sampling circuit, in which a resistor voltage division is selected for the bus voltage sampling circuit 30 to realize voltage collection, and after the bus voltage sampling circuit divides the voltage through the resistor, a corresponding voltage detection signal is output to the control circuit 12 in the driving module 10, so that the driving module 10 can determine the bus voltage, and thereby the dc motor is driven to work or stop working according to the bus voltage, so as to realize functions such as overvoltage protection or undervoltage protection.
Referring to fig. 1 to 3, in an embodiment, the dc motor assembly of the constant speed air conditioner external unit further includes:
The current sampling circuit 40 is electrically connected with the driving module 10, and the current sampling circuit 40 is configured to detect an output current of the driving module 10 and output a corresponding current detection signal to the driving module 10, so that the driving module 10 drives the dc motor to operate/stop operating according to the current detection signal.
In this embodiment, the current sampling circuit 40 may select a current sensor to realize current collection, and the current sampling circuit 40 can collect the output current of the driving module 10 and output a corresponding current detection signal to the control circuit 12 in the driving module 10, so that the driving module 10 can determine the magnitude of the output current, and thus drive the dc motor to work or stop working according to the magnitude of the output current, so as to realize the functions of current limiting protection or overcurrent protection. For example, when the driving module 10 determines that the output current is greater than 1.04A and lasts for 10 ms through the current detection signal, the direct current motor is driven to stop working so as to realize overcurrent protection. Referring to fig. 9 and 10, fig. 9 is a schematic circuit diagram of an embodiment of a current sampling circuit, fig. 10 is a schematic circuit diagram of an embodiment of an overcurrent protection circuit, a resistor voltage is selected for voltage division by the current sampling circuit 40 to collect voltage, and the corresponding current is determined according to the collected voltage to collect current, and the overcurrent protection circuit is used to drive the dc motor to operate or stop operating according to the output current to realize the functions of current limiting protection or overcurrent protection.
Referring to fig. 1 and 2, in an embodiment, the dc motor assembly of the constant speed air conditioner external unit further includes:
The temperature sampling circuit 50 is electrically connected with the driving module 10, and the temperature sampling circuit 50 is configured to detect an operating temperature of the dc motor body and output a corresponding temperature detection signal to the driving module 10, so that the driving module 10 drives the dc motor to operate/stop operating according to the temperature detection signal.
In this embodiment, the temperature sampling circuit 50 may select a temperature sensor to realize temperature collection, and the temperature sampling circuit 50 can collect the working temperature of the dc motor body and output a corresponding temperature detection signal to the control circuit 12 in the driving module 10, so that the driving module 10 can determine the working temperature, and thereby drive the dc motor to work or stop working according to the working temperature, so as to realize functions such as temperature protection. For example, when the driving module 10 determines that the operating temperature of the dc motor body is greater than 105 ℃ and lasts for 1 second through the current detection signal, the dc motor is driven to stop operating, so as to realize over-temperature protection.
The invention also provides a constant-speed air conditioner external unit, which comprises the direct current motor component of the constant-speed air conditioner external unit, and the specific structure of the direct current motor component of the constant-speed air conditioner external unit refers to the embodiment.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311028671.4A CN119492135A (en) | 2023-08-15 | 2023-08-15 | DC motor assembly of constant-speed air conditioner external unit and constant-speed air conditioner external unit |
| PCT/CN2024/106446 WO2025036087A1 (en) | 2023-08-15 | 2024-07-19 | Direct-current motor assembly of constant-speed air conditioner outdoor unit, and constant-speed air conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311028671.4A CN119492135A (en) | 2023-08-15 | 2023-08-15 | DC motor assembly of constant-speed air conditioner external unit and constant-speed air conditioner external unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119492135A true CN119492135A (en) | 2025-02-21 |
Family
ID=94621885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311028671.4A Pending CN119492135A (en) | 2023-08-15 | 2023-08-15 | DC motor assembly of constant-speed air conditioner external unit and constant-speed air conditioner external unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN119492135A (en) |
| WO (1) | WO2025036087A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0886499A (en) * | 1994-09-14 | 1996-04-02 | Hitachi Ltd | Air conditioner |
| CN202121474U (en) * | 2011-05-25 | 2012-01-18 | 简伟松 | Direct mains supply no-brush direct current motor |
| CN103199777B (en) * | 2013-04-18 | 2015-09-30 | 中国扬子集团滁州扬子空调器有限公司 | Brushless electric machine air-conditioning system outdoor motor control circuit |
| CN205407654U (en) * | 2016-02-22 | 2016-07-27 | 广东美的生活电器制造有限公司 | Food preparation machine circuit and food preparation machine |
| CN207691712U (en) * | 2017-12-21 | 2018-08-03 | 上海岭芯微电子有限公司 | A kind of motor of constant rotational speed high-precision control |
| CN216667945U (en) * | 2021-04-07 | 2022-06-03 | 深圳拓邦股份有限公司 | Control circuit, circuit board, outdoor direct current fan device and fixed frequency air conditioning system |
-
2023
- 2023-08-15 CN CN202311028671.4A patent/CN119492135A/en active Pending
-
2024
- 2024-07-19 WO PCT/CN2024/106446 patent/WO2025036087A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2025036087A1 (en) | 2025-02-20 |
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