PWM (Pulse Width Modulation)-based inflator pump motor power control method and device

Abstract

The invention discloses a PWM (Pulse Width Modulation)-based inflator pump motor power control method and a PWM-based inflator pump motor power control device, which can be applied to rotating speed control of a motor. According to the motor rotating speed control method, the output power is obtained, the PWM duty ratio parameter used for driving the motor is adjusted in combination with the output power and the real-time rotating speed, and the rotating speed or power of the motor is stabilized by generating the motor rotating speed control signal through the PWM duty ratio parameter, so that the situation that the motor rotating speed is reduced due to motor power reduction is compensated; the rotating speed of the motor can still be kept stable under the condition that the power of the motor is reduced, and the defect that in the prior art, a device circuit needs to be added on an original functional circuit to increase cost is overcome; therefore, according to the motor rotating speed control method, the technical effect that a user can adjust the rotating speed of the motor under the condition that the hardware cost is not increased is improved, and the user experience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of air pumps, and in particular to a PWM-based air pump motor power control method and device. Background Art

[0002] The air pump is also called an air pump, an air pump, or an air pump. The air pump works by the operation of the motor, and the motor is inflated based on the principle of atmospheric pressure. Air pumps are mostly used in vehicles such as cars, motorcycles, bicycles, leather balls, and rubber boats. When the air pump is pumping air, the valve of the connecting vessel is opened by the atmospheric pressure, and the gas enters the cylinder. When the air pump inflates the tire, the valve is closed by the air pressure in the cylinder, and the gas enters the tire. At present, the air pump is one of the common tools for travel. Taking cars as an example, the car air pump has the advantage of small size and occupies a small volume. It can be placed directly in the trunk of the car and is easy to carry. The car air pump also has the advantages of high power and high efficiency. When the car tire needs to be restarted, the car air pump is used to inflate the tire quickly. In addition, the air pump can also inflate props such as balls and swimming rings.

[0003] PWM (Pulse Width Modulation) control technology, that is, pulse width modulation technology, modulates the width of a series of pulses to equivalently obtain the required waveform (including shape and amplitude). PWM control technology is most widely used in inverter circuits, and most of the inverter circuits used are PWM type. It is precisely because of its application in inverter circuits that PWM control technology has determined its important position in power electronics technology. The basic principle of PWM control Theoretical basis: When narrow pulses with equal impulses but different shapes are added to a link with inertia, the effect is basically the same. Impulse refers to the area of ​​the narrow pulse. The effect is basically the same, which means that the output response waveform of the link is basically the same. The low frequency band is very close, and there is only a slight difference in the high frequency band.

[0004] Because the inflatable objects require different gases and air pressures, in order to suit different inflatable products, multiple air pumps with different powers will be purchased. However, high-power air pumps are less used, resulting in a waste of power resources. Summary of the invention

[0005] The purpose of the present invention is to provide a PWM-based air pump motor power control method and device, aiming to solve the technical problem of power waste in existing air pump motors.

[0006] A first aspect of the present invention provides a PWM-based air pump motor power control method, the method comprising:

[0007] Collecting the inflation pressure at the load end of the inflation pump, and obtaining the real-time speed required by the inflation pump motor according to the inflation pressure;

[0008] Calculate the output power corresponding to the rotation speed according to the rotation speed, and obtain modulation information according to the output power;

[0009] Obtaining a PWM (Pulse width modulation) duty cycle parameter for driving the motor according to the modulation information;

[0010] A motor speed control signal is generated according to the PWM duty cycle parameter; and the speed of the motor is controlled according to the motor speed control signal.

[0011] In the above implementation process, the motor speed control method obtains the output power, and combines the output power and real-time speed to adjust the PWM duty cycle parameters used to drive the motor, and generates a motor speed control signal through the PWM duty cycle parameters to stabilize the speed or power of the motor, thereby compensating for the reduction in motor speed caused by the decrease in motor power, so that the motor speed can remain stable when the motor power is reduced, overcoming the disadvantage of the prior art that device circuits need to be added to the original functional circuit to increase costs; thus, the motor speed control method improves the technical effect that users can achieve by adjusting the motor speed without increasing hardware costs, thereby improving user experience.

[0012] Furthermore, the step of obtaining the output power includes:

[0013] The power of the air pump motor is sampled to generate the output power.

[0014] In the above implementation process, by sampling the power of the air pump motor, the current output speed of the battery can be obtained, and then the output power can be generated.

[0015] Furthermore, the step of obtaining modulation information according to the output power and the real-time rotation speed includes:

[0016] According to the working speed of the motor, the real-time speed is obtained;

[0017] Calculating a ratio between the output power and the real-time rotation speed;

[0018] The modulation information is obtained according to the ratio.

[0019] In the above implementation process, the modulation information about the PWM duty cycle parameters is obtained by calculating the ratio between the output power and the real-time speed. When the motor power is reduced, the motor speed can still be kept stable through the PWM duty cycle parameters.

[0020] Furthermore, the step of obtaining a PWM duty cycle parameter for driving the motor according to the modulation information comprises:

[0021] Obtaining a pulse signal duty cycle according to the ratio;

[0022] The PWM duty cycle parameter is obtained according to the pulse signal duty cycle.

[0023] The first aspect of the present invention provides a PWM-based air pump motor power control device, comprising:

[0024] An acquisition module, used for acquiring output power;

[0025] A modulation module, used for obtaining modulation information according to the output power and the real-time rotation speed;

[0026] A duty cycle module, used for obtaining a PWM duty cycle parameter for driving a motor according to the modulation information;

[0027] A speed module, used to generate a motor speed control signal according to the PWM duty cycle parameter;

[0028] A control module is used to control the speed of the motor according to the motor speed control signal.

[0029] Furthermore, the acquisition module is specifically used to sample the power of the air pump motor to generate the output power.

[0030] Furthermore, the modulation module includes:

[0031] A working speed unit, used to obtain the real-time speed according to the working speed of the motor;

[0032] A ratio unit, used for calculating the ratio between the output power and the real-time rotation speed;

[0033] A modulation unit is used to obtain the modulation information according to the ratio.

[0034] Furthermore, the duty cycle module includes:

[0035] A pulse unit, used for obtaining a pulse signal duty cycle according to the ratio;

[0036] A duty cycle unit is used to obtain the PWM duty cycle parameter according to the pulse signal duty cycle.

[0037] The PWM-based air pump motor power control method and device of the real-time example of the present invention can be applied to the speed control of the motor; the motor speed control method obtains the output power, and adjusts the PWM duty cycle parameters used to drive the motor in combination with the output power and the real-time speed, and generates a motor speed control signal through the PWM duty cycle parameters to stabilize the speed or power of the motor, thereby compensating for the reduction in motor speed caused by the decrease in motor power, so that the motor speed can still remain stable when the motor power is reduced, overcoming the disadvantage of the prior art that device circuits need to be added to the original functional circuit to increase the cost; thus, the motor speed control method improves the technical effect that users can adjust the motor speed without increasing hardware costs, thereby improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A flow chart of a PWM-based air pump motor power control method provided in an embodiment of the present invention;

[0039] Figure 2 This is the schematic diagram of PWM motor control;

[0040] Figure 3 A structural block diagram of a PWM-based air pump motor power control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following is a detailed description of the implementation of the present invention in conjunction with the accompanying drawings, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention are made clearer and easier to understand through the description.

[0042] Example 1

[0043] like Figure 1 As shown, an embodiment of the present invention provides a PWM-based air pump motor power control method, the method comprising:

[0044] Collecting the inflation pressure at the load end of the inflation pump, and obtaining the real-time speed required by the inflation pump motor according to the inflation pressure;

[0045] Calculate the output power corresponding to the rotation speed according to the rotation speed, and obtain modulation information according to the output power;

[0046] Obtaining a PWM (Pulse width modulation) duty cycle parameter for driving the motor according to the modulation information;

[0047] A motor speed control signal is generated according to the PWM duty cycle parameter; and the speed of the motor is controlled according to the motor speed control signal.

[0048] In the above implementation process, the motor speed control method obtains the output power, and combines the output power and real-time speed to adjust the PWM duty cycle parameters used to drive the motor, and generates a motor speed control signal through the PWM duty cycle parameters to stabilize the speed or power of the motor, thereby compensating for the reduction in motor speed caused by the decrease in motor power, so that the motor speed can remain stable when the motor power is reduced, overcoming the disadvantage of the prior art that device circuits need to be added to the original functional circuit to increase costs; thus, the motor speed control method improves the technical effect that users can achieve by adjusting the motor speed without increasing hardware costs, thereby improving user experience.

[0049] Furthermore, the step of obtaining the output power includes:

[0050] The power of the air pump motor is sampled to generate the output power.

[0051] In the above implementation process, by sampling the power of the air pump motor, the current output speed of the battery can be obtained, and then the output power can be generated.

[0052] Furthermore, the step of obtaining modulation information according to the output power and the real-time rotation speed includes:

[0053] According to the working speed of the motor, the real-time speed is obtained;

[0054] Calculating a ratio between the output power and the real-time rotation speed;

[0055] The modulation information is obtained according to the ratio.

[0056] In the above implementation process, the modulation information about the PWM duty cycle parameters is obtained by calculating the ratio between the output power and the real-time speed. When the motor power is reduced, the motor speed can still be kept stable through the PWM duty cycle parameters.

[0057] Furthermore, the step of obtaining a PWM duty cycle parameter for driving the motor according to the modulation information comprises:

[0058] Obtaining a pulse signal duty cycle according to the ratio;

[0059] The PWM duty cycle parameter is obtained according to the pulse signal duty cycle.

[0060] The first aspect of the present invention provides a PWM-based air pump motor power control device, comprising:

[0061] An acquisition module, used for acquiring output power;

[0062] A modulation module, used for obtaining modulation information according to the output power and the real-time rotation speed;

[0063] A duty cycle module, used for obtaining a PWM duty cycle parameter for driving a motor according to the modulation information;

[0064] A speed module, used to generate a motor speed control signal according to the PWM duty cycle parameter;

[0065] A control module is used to control the speed of the motor according to the motor speed control signal.

[0066] Furthermore, the acquisition module is specifically used to sample the power of the air pump motor to generate the output power.

[0067] Furthermore, the modulation module includes:

[0068] A working speed unit, used to obtain the real-time speed according to the working speed of the motor;

[0069] A ratio unit, used for calculating the ratio between the output power and the real-time rotation speed;

[0070] A modulation unit is used to obtain the modulation information according to the ratio.

[0071] Furthermore, the duty cycle module includes:

[0072] A pulse unit, used for obtaining a pulse signal duty cycle according to the ratio;

[0073] A duty cycle unit is used to obtain the PWM duty cycle parameter according to the pulse signal duty cycle.

[0074] The PWM-based air pump motor power control method and device of the real-time example of the present invention can be applied to the speed control of the motor; the motor speed control method obtains the output power, and adjusts the PWM duty cycle parameters used to drive the motor in combination with the output power and the real-time speed, and generates a motor speed control signal through the PWM duty cycle parameters to stabilize the speed or power of the motor, thereby compensating for the reduction in motor speed caused by the decrease in motor power, so that the motor speed can still remain stable when the motor power is reduced, overcoming the disadvantage of the prior art that device circuits need to be added to the original functional circuit to increase the cost; thus, the motor speed control method improves the technical effect that users can adjust the motor speed without increasing hardware costs, thereby improving user experience.

[0075] Because the inflatable objects require different gases and air pressures, in order to adapt to different inflatable products, multiple air pumps with different powers will be purchased, but high-power air pumps are rarely used. In order to avoid waste, we have developed a technical solution for the air pump motor power control method and device based on PWM. Low-power air pumps can also inflate products with atmospheric pressure and gas volume, and quickly without reducing the usability.

[0076] Product hardware: 1 motor, 2 batteries, 3 loads, 4 electronic controls

[0077] Usually the power is designed for maximum load, but in reality only a small part of it can be used, which means that this maximum load is wasted.

[0078] For example, the maximum current is designed to be 30A, and the normal range is 20A, but in reality 10A may be enough. Through PWM technology, the air pump can work within 10A, and sometimes it can meet the work of 20A. For example, the motor has a high cost of 30,000 revolutions, so I can use 20,000 revolutions.

[0079] The high-power air pump increases the pressure directly without considering overload. Our current solution is to use low power to inflate high-power products. There is no need for the pressure to rise parabolically, but to control the inflation at a steady pressure of less than 20A.

[0080] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0081] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A PWM-based air pump motor power control method, characterized in that: The method comprises: collecting the inflation pressure at the load end of the inflation pump, and obtaining the real-time speed required by the inflation pump motor according to the inflation pressure; Calculate the output power corresponding to the rotation speed according to the rotation speed, and obtain modulation information according to the output power; Obtaining a PWM duty cycle parameter for driving a motor according to the modulation information; A motor speed control signal is generated according to the PWM duty cycle parameter; and the speed of the motor is controlled according to the motor speed control signal.

2. The PWM-based air pump motor power control method according to claim 1, characterized in that: The step of obtaining the output power comprises: The power of the air pump motor is sampled to generate the output power.

3. The PWM-based air pump motor power control method according to claim 1, characterized in that: The step of obtaining modulation information according to the output power and the real-time rotation speed comprises: According to the working speed of the motor, the real-time speed is obtained; Calculating a ratio between the output power and the real-time rotation speed; The modulation information is obtained according to the ratio.

4. The PWM-based air pump motor power control method according to claim 1, characterized in that: The step of obtaining a PWM duty cycle parameter for driving the motor according to the modulation information comprises: obtaining a pulse signal duty cycle according to the ratio; The PWM duty cycle parameter is obtained according to the pulse signal duty cycle.

5. A PWM-based air pump motor power control device, characterized in that: The device comprises: An acquisition module, used for acquiring output power; A modulation module, used for obtaining modulation information according to the output power and the real-time rotation speed; A duty cycle module, used to obtain a PWM duty cycle parameter for driving the motor according to the modulation information; a speed module, used to generate a motor speed control signal according to the PWM duty cycle parameter; A control module is used to control the speed of the motor according to the motor speed control signal.

6. The PWM-based air pump motor power control device according to claim 5, characterized in that: The acquisition module is specifically used to sample the power of the air pump motor to generate the output power.

7. The PWM-based air pump motor power control device according to claim 5, characterized in that: The modulation module comprises: A working speed unit, used to obtain the real-time speed according to the working speed of the motor; A ratio unit, used for calculating the ratio between the output power and the real-time rotation speed; A modulation unit is used to obtain the modulation information according to the ratio.

8. The PWM-based air pump motor power control device according to claim 5, characterized in that: The duty cycle module comprises: A pulse unit, used for obtaining a pulse signal duty cycle according to the ratio; A duty cycle unit is used to obtain the PWM duty cycle parameter according to the pulse signal duty cycle.

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