CN108599473B - Method and device for processing motor resonance noise - Google Patents
Method and device for processing motor resonance noise Download PDFInfo
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- CN108599473B CN108599473B CN201711320640.0A CN201711320640A CN108599473B CN 108599473 B CN108599473 B CN 108599473B CN 201711320640 A CN201711320640 A CN 201711320640A CN 108599473 B CN108599473 B CN 108599473B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
Abstract
The invention provides a method and a device for processing motor resonance noise. The processing method of the motor resonance noise comprises the following steps: detecting the current waveform of the motor, and determining the current frequency wave peak value of the motor according to the current waveform; judging whether the wave peak value of the current frequency is larger than a first preset wave peak value or not; and if so, injecting a carrier frequency signal to the voltage input end of the motor to reduce the peak value of the current frequency wave, thereby reducing the resonance noise of the motor. According to the scheme, the resonance noise of the motor is reduced by smoothing the current waveform of the motor, the overall acoustic quality of the motor is effectively improved, and the target wave peak value of the carrier frequency signal is accurately determined, so that the current frequency wave peak value after the carrier frequency signal is injected meets the requirement.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a method and a device for processing motor resonance noise.
Background
With the development of society and the increasing living standard of people, the air conditioner has become one of the indispensable electrical devices in people's daily life. The air conditioner can help people to reach a temperature suitable for the environment when the environment temperature is too high or too low.
The fan of the air conditioner can realize ventilation and can play a role in heat dissipation when the air conditioner performs refrigeration. The motor is used as an important component of the fan and can drive the fan to work. When the fan is a DC motor, the DC motor is rotated to drive the fan impeller to rotate by inputting DC electric energy, thereby realizing the process of converting the electric energy into mechanical energy.
The problem of resonance magnetic sound often appears in the direct current motor of present air conditioner fan in the operation process. The noise exists along with the electrification of the motor, particularly under the condition of low wind operation, the resonance magnetic sound of the motor is particularly prominent, and the sound quality and the use experience of a user are seriously influenced.
Disclosure of Invention
An object of the present invention is to reduce resonance noise of a motor.
A further object of the invention is to improve the sound quality of the motor and to enhance the user experience.
Particularly, the invention provides a method for processing motor resonance noise, which comprises the following steps: detecting the current waveform of the motor, and determining the current frequency wave peak value of the motor according to the current waveform; judging whether the wave peak value of the current frequency is larger than a first preset wave peak value or not; and if so, injecting a carrier frequency signal to the voltage input end of the motor to reduce the peak value of the current frequency wave, thereby reducing the resonance noise of the motor.
Optionally, the step of injecting a carrier frequency signal into the voltage input of the motor comprises: determining a target wave peak value of the carrier frequency signal according to the current frequency wave peak value and a first preset wave peak value; repeatedly superposing the high-frequency pulse signal through a switch arranged at the voltage input end to obtain a carrier frequency signal with a wave peak value as a target wave peak value; and injecting the carrier frequency signal into the voltage input terminal.
Optionally, the step of determining the target peak value of the carrier frequency signal according to the current frequency peak value and the first preset peak value includes: calculating the difference value of the current frequency wave peak value and a first preset wave peak value; judging whether the difference value is less than or equal to a second preset wave peak value; and if so, determining the difference value as a target wave peak value of the carrier frequency signal.
Optionally, when the difference is greater than the second preset peak value, alarm information is output to prompt a user to adjust the air gap between the stator and the rotor of the motor.
Optionally, after the carrier frequency signal with the peak value as the target peak value is injected into the voltage input terminal, the current frequency peak value reduces the target peak value.
According to another aspect of the present invention, there is also provided a device for processing motor resonance noise, including: the detection module is configured to detect a current waveform of the motor and determine a current frequency wave peak value of the motor according to the current waveform; the judging module is configured to judge whether the wave peak value of the current frequency is larger than a first preset wave peak value or not; and the noise reduction module is configured to inject a carrier frequency signal into the voltage input end of the motor when the current frequency wave peak value is larger than a first preset wave peak value so as to reduce the current frequency wave peak value of the motor and further reduce the resonance noise of the motor.
Optionally, the noise reduction module comprises: the peak determining submodule is configured to determine a target peak value of the carrier frequency signal according to the current frequency peak value and a first preset peak value; the signal superposition submodule is configured to repeatedly superpose the high-frequency pulse signal through a switch arranged at the voltage input end so as to obtain a carrier frequency signal with a wave peak value as a target wave peak value; and a signal injection submodule configured to inject a carrier frequency signal into the voltage input.
Optionally, the peak determination sub-module is further configured to: calculating the difference value of the current frequency wave peak value and a first preset wave peak value; judging whether the difference value is less than or equal to a second preset wave peak value; and if so, determining the difference value as a target wave peak value of the carrier frequency signal.
Optionally, the device for processing motor resonance noise further includes: and the alarm module is configured to output alarm information when the difference value is larger than the second preset wave peak value so as to prompt a user to adjust the air gaps of the stator and the rotor of the motor.
Optionally, the noise reduction module is further configured to: after the carrier frequency signal with the wave peak value as the target wave peak value is injected into the voltage input end, the current frequency wave peak value reduces the target wave peak value.
The invention relates to a method and a device for processing motor resonance noise, which determine the current frequency wave peak value of a motor according to the current waveform by detecting the current waveform of the motor; judging whether the wave peak value of the current frequency is larger than a first preset wave peak value or not; and when the result is that, to the voltage input end injection carrier frequency signal of motor to reduce current frequency wave peak value, and then reduce the resonance noise of motor, reduce the resonance noise of motor through the current waveform of gentle motor, effectively improve the complete machine sound quality of motor, promote user's use and experience.
Further, the method and apparatus for processing motor resonance noise of the present invention injects a carrier frequency signal into a voltage input terminal of the motor, including: determining a target wave peak value of the carrier frequency signal according to the current frequency wave peak value and a first preset wave peak value; repeatedly superposing the high-frequency pulse signal through a switch arranged at the voltage input end to obtain a carrier frequency signal with a wave peak value as a target wave peak value; and injecting the carrier frequency signal into the voltage input end, so that the target wave peak value of the carrier frequency signal can be accurately determined, the current frequency wave peak value after the carrier frequency signal is injected meets the requirement, alarm information can be output when the difference between the current frequency wave peak value and the first preset wave peak value is larger than the second preset wave peak value, a user is prompted to be incapable of ensuring normal work of the motor while reducing resonance noise of the motor in a mode of injecting a gentle current waveform of the carrier frequency signal, the user is required to further adjust the air gap between the stator and the rotor of the motor, and the working reliability of the motor is further ensured.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic diagram of a method of treating motor resonance noise according to one embodiment of the present invention;
fig. 2 is a schematic diagram of a primary current frequency waveform, a carrier frequency signal frequency waveform and a current frequency waveform after injection of a carrier frequency signal of a motor in a method for processing motor resonance noise according to an embodiment of the invention;
FIG. 3 is a detailed flow chart of a method of processing motor resonance noise according to one embodiment of the present invention;
fig. 4 is a block diagram of a structure of a device for processing motor resonance noise according to an embodiment of the present invention; and
fig. 5 is a block diagram of a structure of a device for processing motor resonance noise according to another embodiment of the present invention.
Detailed Description
The embodiment firstly provides a method for processing the resonance noise of the motor, which can reduce the resonance noise of the motor through the current waveform of the gentle motor, effectively improve the sound quality of the whole motor and improve the use experience of users. Fig. 1 is a schematic diagram of a method for processing motor resonance noise according to an embodiment of the present invention, which can perform the following steps:
step S102, detecting the current waveform of the motor, and determining the current frequency wave peak value of the motor according to the current waveform;
step S104, judging whether the wave peak value of the current frequency is larger than a first preset wave peak value, if so, executing step S106, otherwise, returning to execute step S102;
and step S106, injecting a carrier frequency signal into the voltage input end of the motor to reduce the current frequency wave peak value of the motor, thereby reducing the resonance noise of the motor.
In the above steps, the first preset crest value in step S104 may be set according to actual needs. For example, when the peak value of the current frequency is greater than X, the vibration level of the motor is considered to be severe and the resonance noise is prominent, and the first preset peak value may be set to X. In step S104, it is determined whether the current frequency peak value is greater than a first preset peak value, that is, whether the resonance noise of the motor is serious.
Fig. 2 is a schematic diagram of a primary current frequency waveform 201, a carrier frequency signal frequency waveform 202 and a current frequency waveform 203 after injecting a carrier frequency signal of a motor in a method for processing motor resonance noise according to an embodiment of the invention. As shown in fig. 2, after the carrier frequency signal waveform 202 is injected into the voltage input end, the original current frequency waveform 201 of the motor can be changed, and the current frequency waveform 203 after the carrier frequency signal is injected becomes smoother than the original current frequency waveform 201, thereby reducing the resonance noise of the motor. The high-frequency pulse signal can be generated by a high-frequency pulse signal generator, and the high-frequency pulse signal generator can generate any duty ratio and frequency signal within a certain range.
The step of injecting the carrier frequency signal into the voltage input terminal of the motor in step S106 may include: determining a target wave peak value of the carrier frequency signal according to the current frequency wave peak value and a first preset wave peak value; repeatedly superposing the high-frequency pulse signal through a switch arranged at the voltage input end to obtain a carrier frequency signal with a wave peak value as a target wave peak value; and injecting the carrier frequency signal into the voltage input terminal. After the carrier frequency signal with the wave peak value as the target wave peak value is injected into the voltage input end, the current frequency wave peak value reduces the target wave peak value. For example, when a carrier frequency signal with a target wave peak value of 0.02A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.02A; when a carrier frequency signal with a target wave peak value of 0.04A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.04A; when a carrier frequency signal with a target wave peak value of 0.06A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.06A; when the carrier frequency signal with the target wave peak value of 0.08A is injected into the voltage input end, the current frequency wave peak value of the motor is reduced by 0.08A.
In a specific embodiment, the step of determining the target peak value of the carrier frequency signal according to the current frequency peak value and the first preset peak value may include: calculating the difference value of the current frequency wave peak value and a first preset wave peak value; judging whether the difference value is less than or equal to a second preset wave peak value; and if so, determining the difference value as a target wave peak value of the carrier frequency signal. The target wave peak value of the carrier frequency signal is limited, and the influence on the normal work of the motor caused by overlarge current waveform adjustment of the motor is avoided. When the difference value between the current frequency peak value and the first preset peak value is larger than the second preset peak value, alarm information can be output to prompt a user that the resonance noise of the motor cannot be reduced and the normal work of the motor cannot be guaranteed in a mode of injecting carrier frequency signals to smooth the current waveform, and the user is required to further adjust the air gaps of the stator and the rotor of the motor to improve the current waveform and the noise of the whole motor. The stator and rotor air gap of the motor is the gap between the stator and the rotor of the motor. Generally, the air gap between the stator and the rotor is increased, so that the current waveform of the motor and the overall noise can be improved. In other embodiments, a value slightly larger than the difference between the current frequency peak value and the first predetermined peak value may be used as the target peak value of the carrier signal, provided that the value is also smaller than or equal to the second predetermined peak value.
In the method for processing the motor resonance noise, the current waveform of the motor is detected, and the current frequency wave peak value of the motor is determined according to the current waveform; judging whether the wave peak value of the current frequency is larger than a first preset wave peak value or not; and when the result is that, to the voltage input end injection carrier frequency signal of motor to reduce current frequency wave peak value, and then reduce the resonance noise of motor, reduce the resonance noise of motor through the current waveform of gentle motor, effectively improve the complete machine sound quality of motor, promote user's use and experience.
In some optional embodiments, the motor may achieve a higher technical effect through further optimization and configuration of the above steps, and the following describes the method for processing the motor resonance noise of this embodiment in detail with reference to an optional execution flow of this embodiment, where this embodiment is merely an illustration of the execution flow, and in a specific implementation, an execution sequence and an operation condition of a part of steps may be modified according to specific implementation requirements. Fig. 3 is a detailed flowchart of a method for processing motor resonance noise according to an embodiment of the present invention, the method for processing motor resonance noise includes the following steps:
step S302, detecting the current waveform of the motor, and determining the current frequency wave peak value of the motor according to the current waveform;
step S304, judging whether the wave peak value of the current frequency is larger than a first preset wave peak value, if so, executing step S306, otherwise, returning to execute step S302;
step S306, calculating the difference value between the current frequency wave peak value and a first preset wave peak value;
step S308, judging whether the difference value is less than or equal to a second preset wave peak value, if so, executing step S312, and if not, executing step S310;
step S310, outputting alarm information to prompt a user to adjust the air gaps of the stator and the rotor of the motor;
step S312, determining the difference value as a target wave peak value of the carrier frequency signal;
step S314, repeatedly superposing the high-frequency pulse signal through a switch arranged at the voltage input end to obtain a carrier frequency signal with a wave peak value as a target wave peak value;
step S316, a carrier frequency signal is injected into the voltage input end to reduce the peak value of the current frequency wave of the motor, thereby reducing the resonance noise of the motor.
In the above steps, the first preset crest value in step S304 may be set according to actual needs. For example, when the peak value of the current frequency is greater than X, the vibration level of the motor is considered to be severe and the resonance noise is prominent, and the first preset peak value may be set to X. In step S304, it is determined whether the current frequency peak value is greater than a first preset peak value, that is, whether the resonance noise of the motor is serious.
The second preset wave peak value in step S308 may also be set according to actual needs, and specifically, the current frequency wave peak value may meet the requirement of normal operation of the motor when the second preset wave peak value is reduced. The target wave peak value of the carrier frequency signal is limited, so that the influence on the normal work of the motor caused by overlarge current waveform adjustment of the motor can be avoided.
And S310, when the difference value is larger than the second preset wave peak value, outputting alarm information to prompt a user that the resonance noise of the motor cannot be reduced and the normal work of the motor cannot be ensured by injecting a carrier frequency signal to smooth the current waveform, and requiring the user to further adjust the air gap between the stator and the rotor of the motor to improve the current waveform and the noise of the whole motor. Generally, the air gap between the stator and the rotor is increased, so that the current waveform of the motor and the overall noise can be improved. Wherein the alarm information can be a buzzer or other prompt signals.
In step S312, the difference between the current frequency peak value and the first preset peak value is determined as the target peak value of the carrier frequency signal, and in some other embodiments, a value slightly larger than the difference may be used as the target peak value of the carrier frequency signal, provided that the value is also smaller than or equal to the second preset peak value.
The high frequency pulse signal in step S314 may be generated by a high frequency pulse signal generator, which may generate any duty ratio and frequency signal within a certain range. The high-frequency pulse signal is repeatedly superposed through a switch arranged at the voltage input end, so that a carrier frequency signal with a wave peak value as a target wave peak value can be obtained.
After the carrier frequency signal is injected into the voltage input terminal in step S316, the original current frequency waveform of the motor can be changed, and the current frequency peak value of the motor is reduced. The current frequency waveform after the carrier frequency signal is injected becomes gentle compared with the original current frequency waveform, so that the resonance noise of the motor is reduced. Specifically, after a carrier frequency signal having a peak value as a target peak value is injected into the voltage input terminal, the current frequency peak value lowers the target peak value. For example, when a carrier frequency signal with a target wave peak value of 0.02A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.02A; when a carrier frequency signal with a target wave peak value of 0.04A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.04A; when a carrier frequency signal with a target wave peak value of 0.06A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.06A; when the carrier frequency signal with the target wave peak value of 0.08A is injected into the voltage input end, the current frequency wave peak value of the motor is reduced by 0.08A.
One specific example is described below:
the current frequency peak value of the motor is determined to be 0.16A by detecting the current waveform of the motor, if the first preset peak value is 0.1A and the second preset peak value is 0.08A, the vibration degree of the motor is considered to be serious and the resonance noise is outstanding because the current frequency peak value is larger than the first preset peak value. And calculating the difference value between the current frequency wave peak value and the first preset wave peak value to be 0.06A, and determining the difference value as the target wave peak value of the carrier frequency signal because the difference value is smaller than the second preset wave peak value. At the moment, a carrier frequency signal with a target wave peak value of 0.06A is obtained by repeatedly superposing high-frequency pulse signals, and the carrier frequency signal is injected into a voltage input end of the motor, so that the wave peak value of the current frequency of the motor is reduced by 0.06A, the current waveform of the motor is smoothed, and the resonance noise and the vibration degree of the motor are reduced at the same time. The carrier frequency signal is injected into the voltage input end of the motor, the current waveform of the motor is smoothed, after the resonance noise of the motor is reduced, the current waveform of the motor can be detected again after the preset time, and the carrier frequency signal is determined whether to be injected into the voltage input end of the motor according to the current frequency wave peak value determined by the current waveform of the motor, so that the resonance noise and the vibration degree of the motor are effectively reduced.
The target wave crest value of the carrier frequency signal is limited to be less than or equal to the second preset wave crest value of 0.08A, because if the current waveform of the motor is adjusted too much, the normal operation of the motor may be affected. For example, if the current frequency peak value of the motor is lowered too much, the normal air supply requirement may not be satisfied even if the resonance noise and vibration level of the motor are reduced. The method for processing the motor resonance noise limits the adjustment amplitude of the target wave peak value of the carrier frequency signal injected into the voltage input end of the motor, finely adjusts the current waveform of the motor, can make the current waveform of the motor smooth, reduces the resonance noise and the vibration degree of the motor, and can meet the normal working requirement of the motor. The specific values of the first preset peak value and the second preset peak value are merely examples, and are not intended to limit the present invention.
The method for processing the motor resonance noise can accurately determine the target wave peak value of the carrier frequency signal, so that the current frequency wave peak value after the carrier frequency signal is injected meets the requirement, and when the difference between the current frequency wave peak value and the first preset wave peak value is larger than the second preset wave peak value, alarm information is output to prompt a user that the normal work of the motor cannot be guaranteed while the motor resonance noise is reduced by injecting the carrier frequency signal to smooth the current waveform, the user is required to further adjust the air gap between the stator and the rotor of the motor, and the working reliability of the motor is further guaranteed.
Fig. 4 is a block diagram of a device 400 for processing motor resonance noise according to an embodiment of the present invention. The apparatus 400 for processing motor resonance noise may be disposed in a motor, and is configured to perform the method for processing motor resonance noise according to any of the above embodiments. The device 400 for processing motor resonance noise generally may include: a detection module 410, a determination module 420, and a noise reduction module 430.
In the above modules, the detection module 410 may be configured to detect a current waveform of the motor and determine a current frequency peak value of the motor according to the current waveform.
The determining module 420 may be configured to determine whether the peak value of the current frequency is greater than a first preset peak value. The first preset wave peak value can be set according to actual needs. For example, when the peak value of the current frequency is greater than X, the vibration level of the motor is considered to be severe and the resonance noise is prominent, and the first preset peak value may be set to X. And judging whether the wave peak value of the current frequency is larger than a first preset wave peak value or not, namely judging whether the resonance noise of the motor is serious or not.
The noise reduction module 430 may be configured to inject a carrier frequency signal to the voltage input terminal of the motor when the current frequency peak value is greater than a first preset peak value, so as to reduce the current frequency peak value of the motor, and thus reduce the resonance noise of the motor. The specific step of injecting the carrier frequency signal into the voltage input terminal of the motor may include: determining a target wave peak value of the carrier frequency signal according to the current frequency wave peak value and a first preset wave peak value; repeatedly superposing the high-frequency pulse signal through a switch arranged at the voltage input end to obtain a carrier frequency signal with a wave peak value as a target wave peak value; and injecting the carrier frequency signal into the voltage input terminal. The current frequency waveform after the carrier frequency signal is injected becomes gentle compared with the original current frequency waveform, so that the resonance noise of the motor is reduced. The high-frequency pulse signal can be generated by a high-frequency pulse signal generator, and the high-frequency pulse signal generator can generate any duty ratio and frequency signal within a certain range.
After the carrier frequency signal with the wave peak value as the target wave peak value is injected into the voltage input end, the current frequency wave peak value reduces the target wave peak value. For example, when a carrier frequency signal with a target wave peak value of 0.02A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.02A; when a carrier frequency signal with a target wave peak value of 0.04A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.04A; when a carrier frequency signal with a target wave peak value of 0.06A is injected into a voltage input end, the current frequency wave peak value of the motor is reduced by 0.06A; when the carrier frequency signal with the target wave peak value of 0.08A is injected into the voltage input end, the current frequency wave peak value of the motor is reduced by 0.08A.
In a specific embodiment, the step of determining the target peak value of the carrier frequency signal according to the current frequency peak value and the first preset peak value may include: calculating the difference value of the current frequency wave peak value and a first preset wave peak value; judging whether the difference value is less than or equal to a second preset wave peak value; and if so, determining the difference value as a target wave peak value of the carrier frequency signal. The target wave peak value of the carrier frequency signal is limited, and the influence on the normal work of the motor caused by overlarge current waveform adjustment of the motor is avoided. When the difference value between the current frequency peak value and the first preset peak value is larger than the second preset peak value, alarm information can be output to prompt a user that the resonance noise of the motor cannot be reduced and the normal work of the motor cannot be guaranteed in a mode of injecting carrier frequency signals to smooth the current waveform, and the user is required to further adjust the air gaps of the stator and the rotor of the motor to improve the current waveform and the noise of the whole motor. Generally, the air gap between the stator and the rotor is increased, so that the current waveform of the motor and the overall noise can be improved. In other embodiments, a value slightly larger than the difference between the current frequency peak value and the first predetermined peak value may be used as the target peak value of the carrier signal, provided that the value is also smaller than or equal to the second predetermined peak value.
Fig. 5 is a block diagram illustrating a structure of a device 400 for processing motor resonance noise according to another embodiment of the present invention. On the basis of the above embodiment, the processing apparatus 400 for the motor resonance noise further includes: alarm module 440, noise reduction module 430 includes: a peak determination submodule 431, a signal superposition submodule 432 and a signal injection submodule 433.
Wherein the noise reduction module 430 comprises: a peak determination submodule 431, a signal superposition submodule 432 and a signal injection submodule 433. The peak determining submodule 431 is configured to determine a target peak value of the carrier frequency signal according to the current frequency peak value and the first preset peak value. The signal superposition sub-module 432 is configured to repeatedly superpose the high-frequency pulse signal through a switch provided at the voltage input terminal to obtain a carrier frequency signal whose wave peak value is a target wave peak value. The signal injection submodule 433 is configured to inject a carrier frequency signal into the voltage input. The noise reduction module 430 may also be configured to: after the carrier frequency signal with the wave peak value as the target wave peak value is injected into the voltage input end, the current frequency wave peak value reduces the target wave peak value.
The peak determination submodule 431 may be further configured to: calculating the difference value of the current frequency wave peak value and a first preset wave peak value; judging whether the difference value is less than or equal to a second preset wave peak value; and if so, determining the difference value as a target wave peak value of the carrier frequency signal. The second preset wave peak value can be set according to actual needs, and specifically, the current frequency wave peak value can meet the requirement of normal work of the motor when the second preset wave peak value is reduced. The target wave peak value of the carrier frequency signal is limited, so that the influence on the normal work of the motor caused by overlarge current waveform adjustment of the motor can be avoided.
The alarm module 440 may be configured to output alarm information when the difference is greater than the second preset peak value, so as to prompt a user that normal operation of the motor cannot be ensured while reducing resonance noise of the motor by injecting a carrier frequency signal to smooth the current waveform, and the user is required to further adjust the air gap between the stator and the rotor of the motor to improve the current waveform and the noise of the whole motor. Generally, the air gap between the stator and the rotor is increased, so that the current waveform of the motor and the overall noise can be improved.
The processing device 400 for the motor resonance noise of the embodiment detects the current waveform of the motor and determines the current frequency wave peak value of the motor according to the current waveform; judging whether the wave peak value of the current frequency is larger than a first preset wave peak value or not; and when the result is that, to the voltage input end injection carrier frequency signal of motor to reduce current frequency wave peak value, and then reduce the resonance noise of motor, reduce the resonance noise of motor through the current waveform of gentle motor, effectively improve the complete machine sound quality of motor, promote user's use and experience.
Further, in the processing apparatus 400 for the motor resonance noise of the embodiment, the step of injecting the carrier frequency signal into the voltage input terminal of the motor includes: determining a target wave peak value of the carrier frequency signal according to the current frequency wave peak value and a first preset wave peak value; repeatedly superposing the high-frequency pulse signal through a switch arranged at the voltage input end to obtain a carrier frequency signal with a wave peak value as a target wave peak value; and injecting the carrier frequency signal into the voltage input end, so that the target wave peak value of the carrier frequency signal can be accurately determined, the current frequency wave peak value after the carrier frequency signal is injected meets the requirement, alarm information can be output when the difference between the current frequency wave peak value and the first preset wave peak value is larger than the second preset wave peak value, a user is prompted to be incapable of ensuring normal work of the motor while reducing resonance noise of the motor in a mode of injecting a gentle current waveform of the carrier frequency signal, the user is required to further adjust the air gap between the stator and the rotor of the motor, and the working reliability of the motor is further ensured.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (8)
1. A method for processing motor resonance noise comprises the following steps:
detecting a current waveform of the motor, and determining a current frequency wave peak value of the motor according to the current waveform;
judging whether the wave peak value of the current frequency is larger than a first preset wave peak value or not; and
if so, injecting a carrier frequency signal to the voltage input end of the motor to reduce the peak value of the current frequency wave and further reduce the resonance noise of the motor,
when the difference value between the current frequency crest value and the first preset crest value is larger than the second preset crest value, alarm information is output to prompt a user to adjust the air gaps of the stator and the rotor of the motor.
2. The method of treating motor resonance noise according to claim 1, wherein the step of injecting a carrier frequency signal into a voltage input of the motor comprises:
determining a target wave peak value of the carrier frequency signal according to the current frequency wave peak value and the first preset wave peak value;
repeatedly superposing a high-frequency pulse signal through a switch arranged at the voltage input end to obtain the carrier frequency signal with the wave peak value as the target wave peak value; and
injecting the carrier frequency signal into the voltage input terminal.
3. The method for processing motor resonance noise according to claim 2, wherein the step of determining the target peak value of the carrier frequency signal according to the current frequency peak value and the first preset peak value comprises:
calculating the difference value between the current frequency wave peak value and the first preset wave peak value;
judging whether the difference value is less than or equal to the second preset wave peak value or not; and
and if so, determining the difference as the target wave peak value of the carrier frequency signal.
4. The method for processing motor resonance noise according to claim 2,
and after the carrier frequency signal with the wave peak value as the target wave peak value is injected into the voltage input end, the current frequency wave peak value reduces the target wave peak value.
5. A device for treating motor resonance noise, comprising:
the detection module is configured to detect a current waveform of the motor and determine a current frequency wave peak value of the motor according to the current waveform;
the judging module is configured to judge whether the wave peak value of the current frequency is larger than a first preset wave peak value; and
a noise reduction module configured to inject a carrier frequency signal to a voltage input terminal of the motor when the current frequency peak value is greater than the first preset peak value, so as to reduce the current frequency peak value of the motor and further reduce the resonance noise of the motor,
and the alarm module is configured to output alarm information when the difference value between the current frequency crest value and the first preset crest value is larger than a second preset crest value so as to prompt a user to adjust the air gaps of the stator and the rotor of the motor.
6. The apparatus for processing motor resonance noise according to claim 5, wherein the noise reduction module comprises:
a peak determining submodule configured to determine a target peak value of the carrier frequency signal according to the current frequency peak value and the first preset peak value;
a signal superposition submodule configured to repeatedly superpose a high-frequency pulse signal by a switch provided at the voltage input terminal to obtain the carrier frequency signal having a peak value as the target peak value; and
a signal injection submodule configured to inject the carrier frequency signal into the voltage input.
7. The apparatus for processing motor resonance noise according to claim 6, wherein the peak determination submodule is further configured to:
calculating the difference value between the current frequency wave peak value and the first preset wave peak value;
judging whether the difference value is less than or equal to the second preset wave peak value or not; and
and if so, determining the difference as the target wave peak value of the carrier frequency signal.
8. The apparatus for processing motor resonance noise according to claim 6, wherein the noise reduction module is further configured to:
and after the carrier frequency signal with the wave peak value as the target wave peak value is injected into the voltage input end, the current frequency wave peak value reduces the target wave peak value.
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| CN1339869A (en) * | 2000-08-18 | 2002-03-13 | 开关磁阻驱动有限公司 | Device and method for controlling motor |
| JP2006280045A (en) * | 2005-03-28 | 2006-10-12 | Seiko Epson Corp | Motor drive method, motor drive unit and recording device |
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| CN1339869A (en) * | 2000-08-18 | 2002-03-13 | 开关磁阻驱动有限公司 | Device and method for controlling motor |
| JP2006280045A (en) * | 2005-03-28 | 2006-10-12 | Seiko Epson Corp | Motor drive method, motor drive unit and recording device |
| CN107332492A (en) * | 2017-07-12 | 2017-11-07 | 广州视源电子科技股份有限公司 | Compressor protection method, device and computer-readable recording medium |
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