Phase advance voltage adjustment circuit and motor device

Abstract

The system consists of a phase-advancing angle voltage adjustment circuit (10) and a motor device (100). The phase-advancing angle voltage adjustment circuit (10) comprises a sequentially connected voltage adjustment module (11), an amplification module (12), and a phase-advancing angle voltage generation module (13). The voltage adjustment module (11) is connected to the motor speed adjustment input terminal (VSP), the amplification module (12) is connected to the motor speed adjustment input terminal (VSP), and the phase-advancing angle voltage generation module (13) is connected to the stable voltage output terminal (VREG) and the motor control chip (20), respectively.

Description

Technical Field

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[0005]

[0001] This application claims the priority and rights of a patent application with the patent application number 2023110357993, which was filed with the China National Intellectual Property Administration on August 16, 2023, and the entire content thereof is incorporated herein by reference.

[0002] This application relates to the field of air conditioning technology, and particularly to an advanced phase angle voltage adjustment circuit and a motor device.

Background Art

[0003] Currently, in the control technology of brushless DC motors, a control method is adopted that integrates motor control, drive, and power devices on one drive chip, and only inputs a voltage signal from the outside to realize the operation and speed adjustment functions of the motor. This control method has the advantages of fast response speed, simple control, and high cost performance, and is widely applied in the field of brushless DC motor control. A drive chip using such a hardware control method usually arranges an advanced phase angle voltage adjustment interface and adjusts the advanced phase angle voltage value to realize the adjustment of the advanced phase angle, and the efficiency of the motor is optimized.

[0004] However, when the DC motor is operated at different rotational speeds, the required advanced phase angle often varies (usually, the higher the operating rotational speed, the larger the required advanced phase angle). Therefore, the current advanced phase angle is usually set to a fixed value, and it is difficult to balance the efficiency at different rotational speed points.

Summary of the Invention

Problems to be Solved by the Invention

[0005] This application aims to at least solve one of the technical problems existing in the prior art. For this purpose, this application provides an advanced phase angle voltage adjustment circuit and a motor device.

Means for Solving the Problems

[0006] The phase-advancing angle voltage adjustment circuit according to the embodiment of the present invention is used in a motor device, the motor device is equipped with a motor control chip, and the phase-advancing angle voltage adjustment circuit comprises: a voltage adjustment module connected to a motor speed adjustment input terminal and a ground terminal, respectively, for generating a control signal based on the motor speed adjustment signal of the motor speed adjustment input terminal; an amplification module connected to the motor speed adjustment input terminal and the voltage adjustment module, respectively, for generating an adjustment voltage based on the control signal and the motor speed adjustment signal; and a phase-advancing angle voltage generation module connected to a stable voltage output terminal, the amplification module, and the motor control chip, respectively, for generating a phase-advancing angle voltage based on the adjustment voltage and the output voltage of the stable voltage output terminal and outputting it to the motor control chip, thereby allowing the motor control chip to set the phase-advancing angle based on the phase-advancing angle voltage.

[0007] In some embodiments, the voltage adjustment module includes a first resistor, one end of which is connected to the motor speed adjustment input terminal and the other end of which is connected to the amplification module, and a second resistor, one end of which is connected to the first resistor and the amplification module and the other end of which is connected to the ground terminal.

[0008] In some embodiments, the amplification module comprises an amplification transistor whose first pole is connected to the motor speed adjustment input terminal, whose second pole is connected to the phase advance angle voltage generation module, and whose control pole is connected to the voltage adjustment module.

[0009] In some embodiments, the amplifying transistor is a PNP type transistor.

[0010] In some embodiments, the phase-advancing angle voltage adjustment circuit further comprises an adjustment resistor, one end of which is connected to the second pole of the amplification transistor and the other end of which is connected to the phase-advancing angle voltage generation module.

[0011] In some embodiments, the phase advance angle voltage adjustment circuit further comprises a temperature compensation diode whose positive terminal is connected to the first terminal of the amplification transistor and whose negative terminal is connected to the control terminal of the amplification transistor.

[0012] In some embodiments, the phase-advancing angle voltage generation module includes a third resistor, one end of which is connected to the stable voltage output terminal and the other end of which is connected to the amplification module, and a fourth resistor, one end of which is connected to the third resistor and the amplification module and the other end of which is connected to the ground terminal.

[0013] In some embodiments, the phase-advancing angle voltage adjustment circuit further comprises a filter capacitor, one end of which is connected to the fourth resistor and the other end of which is connected to the ground terminal.

[0014] In some embodiments, the phase advance angle voltage adjustment circuit further comprises a current limiting resistor, one end of which is connected to the motor speed adjustment input terminal and the other end of which is connected to the amplification module.

[0015] The motor device according to the embodiment of the present invention includes the phase advance angle voltage adjustment circuit.

[0016] Additional aspects and advantages of this application are partially shown in the following description, partially become apparent from that description, or are understood through the practice of this application. [Brief explanation of the drawing]

[0017] The above and / or additional aspects and advantages of the present application can be clearly and readily understood by describing embodiments with reference to the following drawings.

[0018] [Figure 1] This is a schematic module diagram of a phase advance angle voltage adjustment circuit according to an embodiment of the present invention. [Figure 2] This is a schematic diagram of a motor device module according to an embodiment of the present invention. [Figure 3]This is a schematic diagram illustrating a phase advance angle voltage test at different temperatures according to an embodiment of the present invention. [Figure 4] This is a schematic diagram showing the results of adjusting the phase advance angle to achieve optimal efficiency at each rotational speed of the motor device according to the embodiment of the present invention. [Modes for carrying out the invention]

[0019] The embodiments of the present application will be described in detail below. Examples relating to the above embodiments are shown in the drawings, and the same or similar reference numerals consistently indicate the same or similar elements or elements having the same or similar function. The embodiments described below with reference to the drawings are illustrative and used to illustrate the present application, and should not be construed as limiting the present application.

[0020] In the description of this application, directions or positional relationships indicated by terms such as "center," "lateral," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise" are based on the directions or positional relationships shown in the drawings and are intended for ease of explanation and simplification of the description of this application. They do not indicate or imply that the device or element being referred to has a specific direction or must be configured and operate in a specific direction, and therefore cannot be understood as limitations of this application. Features that are limited as "first" or "second" may be explicitly or implicitly indicated to include one or more such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0021] In the description of the present application, unless otherwise specifically defined and limited, terms such as "attachment", "connection", "linkage", etc. should be understood in a broad sense. For example, they may be fixedly connected, removably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or may be internal communication between two elements. A person skilled in the art can understand the specific concepts of the above technical terms in the present application according to the specific circumstances.

[0022] In the present application, unless otherwise specifically defined and limited, the statement that the first feature is "above" or "below" the second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact and are in contact through another feature between the first and second features. Also, the statement that the first feature is "above", "upward" and "upper surface" of the second feature includes that the first feature is exactly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The statement that the first feature is "below", "downward" and "lower surface" of the second feature includes that the first feature is exactly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0023] The following disclosure provides many different embodiments or examples to implement different structures of the present application. To simplify the disclosure of the present application, the members and installations of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. It should be noted that the present application can repeat reference numbers and / or reference characters in different embodiments. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the present application provides examples of various specific processes and materials, but a person skilled in the art can be aware of the application of other processes and / or the use of other materials.

[0024] Combining FIGS. 1 and 2, embodiments of the present application provide a leading angle voltage adjustment circuit 10, which is used in a motor device 100. The motor device 100 includes a motor control chip 20, and the leading angle voltage adjustment circuit 10 includes a voltage adjustment module 11, an amplification module 12, and a leading angle voltage generation module 13.

[0025] The voltage adjustment module 11 is respectively connected to a motor speed adjustment input terminal VSP and a ground terminal GND, and is used to generate a control signal based on the motor speed adjustment signal of the motor speed adjustment input terminal VSP. The amplification module 12 is respectively connected to the motor speed adjustment input terminal VSP and the voltage adjustment module 11, and is used to generate an adjustment voltage based on the control signal and the motor speed adjustment signal. The leading angle voltage generation module 13 is respectively connected to a stable voltage output terminal VREG, the amplification module 12, and the motor control chip 20. By generating a leading angle voltage based on the adjustment voltage and the output voltage of the stable voltage output terminal VREG and outputting it to the motor control chip 20, the motor control chip 20 is used to set a leading angle based on the leading angle voltage.

[0026] The present application further provides a motor device 100, which includes the above-mentioned leading angle voltage adjustment circuit 10.

[0027] In the leading angle voltage adjustment circuit 10 according to the embodiments of the present application, the voltage adjustment module 11 generates a control signal based on the motor speed adjustment signal of the motor speed adjustment input terminal VSP, the amplification module 12 generates an adjustment voltage based on the control signal and the motor speed adjustment signal, and the leading angle voltage generates a leading angle voltage based on the adjustment voltage and the output voltage of the stable voltage output terminal VREG. As a result, the leading angle voltage can be associated with the motor speed adjustment signal, and the operating efficiency of the motor device 100 at different rotation speed points is optimized.

[0028] For example, the motor device 100 may be a brushless DC motor, and the motor device 100 may be equipped with a motor control chip 20. The motor control, drive, and power device components of the motor device 100 are integrated into the motor control chip 20, and the operation and speed adjustment functions of the motor device 100 can be realized simply by inputting a voltage signal from an external source to the motor control chip 20.

[0029] The motor control chip 20 includes a phase advance angle setting pin LA and a motor speed adjustment pin LB. The phase advance angle setting pin LA is connectable to the phase advance angle voltage generation module 13 of the phase advance angle voltage adjustment circuit 10 and is used to obtain the phase advance angle voltage. The motor speed adjustment pin LB is connectable to the motor speed adjustment input terminal VSP and is used to obtain the motor speed adjustment signal from the motor speed adjustment input terminal VSP. The motor control chip 20 sets the phase advance angle based on the phase advance angle voltage and adjusts the speed based on the motor speed adjustment signal.

[0030] The motor speed adjustment signal output from the motor speed adjustment input terminal VSP may be a voltage signal; that is, the motor speed adjustment input terminal outputs a voltage value.

[0031] Combining Figure 2, in some embodiments, the voltage adjustment module 11 includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected to the motor speed adjustment input terminal VSP, the other end of the first resistor R1 is connected to the amplification module 12, one end of the second resistor R2 is connected to the first resistor R1 and the amplification module 12, and the other end of the second resistor R2 is connected to the ground terminal GND.

[0032] The first resistor R1 and the second resistor R2 can be adjusted according to the actual conditions of the motor device 100 and the load. There are no specific restrictions on the magnitude of the resistance values. If the resistance values ​​are too small, the current at the motor speed adjustment input terminal VSP will increase, which will affect the overall driving capacity of the speed adjustment port. Therefore, the first resistor R1 and the second resistor R2 should be selected to be as large as possible. For example, in this embodiment, the first resistor R1 may be 100,000 ohms and the second resistor R2 may be 1 megaohm.

[0033] In some embodiments, the amplification module 12 includes an amplification transistor Q1, the first pole of which is connected to the motor speed adjustment input terminal VSP, the second pole of which is connected to the phase advance angle voltage generation module 13, and the control pole of which is connected to the voltage adjustment module 11.

[0034] One point that needs to be explained is that in this embodiment, the first pole of the amplifying transistor Q1 can be the base pole, the second pole of the amplifying transistor Q1 can be the collector pole, and the control pole of the amplifying transistor Q1 can be the emitter pole. The emitter pole is used to provide charge carriers to the collector pole by the base pole region, and the collector pole region is used as the base pole to collect most of the charge carriers emitted from the emitter pole and to control the amount of current from the emitter pole to the collector pole.

[0035] For example, the amplification transistor Q1 is a PNP transistor. As those skilled in the art will understand, a PNP transistor is composed of three different doped semiconductor materials, consisting of a P-type semiconductor, an N-type semiconductor, and a P-type semiconductor, respectively, where the doping concentration of the P-type semiconductor is higher than that of the N-type semiconductor, and the doping concentration of the N-type semiconductor is higher than that of the second P-type semiconductor. A PNP transistor has two states: conduction and disconnection. A PNP transistor is in the conduction state when the voltage at the base terminal of the PNP transistor is higher than the voltage at the emitter terminal and the voltage at the collector terminal is lower than the voltage at the emitter terminal.

[0036] In some embodiments, the phase advance angle voltage adjustment circuit 10 further comprises a temperature compensation diode D1, the positive terminal of which is connected to the first terminal of the amplification transistor Q1, and the negative terminal of which is connected to the control terminal of the amplification transistor Q1.

[0037] To understand this, the PN junction in a PNP transistor is greatly affected by temperature. When the temperature rises, the base current Ib of the PNP transistor increases and the base voltage Vb of the PNP transistor decreases. Conversely, when the temperature decreases, the base current Ib of the PNP transistor decreases and the base voltage Vb of the PNP transistor increases. By connecting a temperature compensation diode D1 to the base and emitter terminals of the amplification transistor Q1, when the temperature rises, the temperature compensation diode D1 conducts, reducing the voltage drop, causing the base voltage Vb of the amplification transistor Q1 to rise and the base current Ib of the amplification transistor Q1 to fall. In this way, the temperature compensation diode D1 compensates for the effect of temperature on the rise in base current Ib of the amplification transistor Q1, and when the temperature falls, the conduction of the temperature compensation diode D1 causes the base voltage Vb of the amplification transistor Q1 to fall, compensating for the base current Ib of the amplification transistor Q1.

[0038] In this embodiment, the temperature compensation diode D1 can be a diode with a conduction voltage of approximately 0.7V.

[0039] By combining Figure 3, in order to verify the effect of temperature on the phase-advancing angle voltage adjustment circuit 10 of this invention, the magnitude of the phase-advancing angle voltage was measured under different temperatures and the same speed adjustment voltage input conditions. If the measurement results showed that the effect of temperature on the phase-advancing angle voltage was very small, then increasing the temperature compensation diode D1 would effectively prevent the temperature effect of the amplification transistor Q1.

[0040] In this way, by connecting the temperature compensation diode D1 to the first pole and control pole of the amplification transistor Q1, the influence of temperature on the amplification transistor Q1 is compensated, and the stability of the phase advance angle voltage control by the phase advance angle voltage adjustment circuit 10 is enhanced.

[0041] In some embodiments, the amplification module 12 further includes an adjustment resistor R5.

[0042] Exemplary, one end of the adjustment resistor R5 is connected to the second pole of the amplifying transistor Q1, and the other end of the adjustment resistor R5 is connected to the phase-advancing voltage generation module 13. The adjustment resistor R5 is used to provide an adjusted voltage to the phase-advancing voltage generation module 13 by adjusting the current and voltage at the second pole of the amplifying transistor Q1.

[0043] The adjustment resistor R5 can be adjusted according to the actual conditions of the motor and load, and its specific value is not limited; for example, in this embodiment, the adjustment resistor R5 is 3 kilohms.

[0044] In some embodiments, the phase-advancing angle voltage generation module 13 includes a third resistor R3 and a fourth resistor R4, where one end of the third resistor R3 is connected to the stable voltage output terminal VREG and the other end of the third resistor R3 is connected to the amplification module 12, one end of the fourth resistor R4 is connected to the third resistor R3 and the amplification module 12 and the other end of the fourth resistor R4 is connected to the ground terminal GND.

[0045] Specifically, the third resistor R3 is directly connected to the fourth resistor R4, and the third resistor R3 is connected to the stable voltage output terminal VREG, and the fourth resistor R4 is connected to the ground terminal GND. The adjustment resistor R5 and the phase advance angle setting pin LA are connected to the connection point between the third resistor R3 and the fourth resistor R4. The third resistor R3 and the fourth resistor R4 are used to generate the initial phase advance angle voltage of the motor control chip 20. The phase advance angle voltage is the sum of the adjustment voltage and the voltage across the fourth resistor R4. When the amplification transistor Q1 is disconnected and the adjustment voltage is 0, the voltage across the fourth resistor R4 is set to the initial phase advance angle voltage. The third resistor R3 and the fourth resistor R4 can be set according to the magnitude of the phase advance angle voltage, and there are no specific numerical limits. For example, in this embodiment, if the initial phase advance angle is 0.45V, the third resistor R3 may be 1 megaohm and the fourth resistor R4 may be 100,000 ohms.

[0046] In this way, by installing the third resistor R3 and the fourth resistor R4, an initial phase-advancing angle voltage can be generated.

[0047] In some embodiments, the phase-advancing angle voltage adjustment circuit 10 further includes a filter capacitor C1, one end of which is connected to the phase-advancing angle voltage generation module 13, and the other end of which is connected to the ground terminal GND.

[0048] Exemplary, one end of the filter capacitor C1 is connected to the connection between the third resistor R3 and the fourth resistor R4, and the other end is connected to the ground terminal GND, thereby removing noise signals contained in the phase-advancing angle voltage. As can be understood, noise signals are generated at the moment of power supply and power cut-off, which easily causes instability in the phase-advancing angle voltage, but by installing the filter capacitor C1, noise signals contained in the phase-advancing angle voltage can be removed. In this embodiment, the capacitance value of the filter capacitor C1 may be 0.1 microfaras.

[0049] In this way, by installing the filter capacitor C1, the effects of phase-advancing voltage due to noise interference are avoided.

[0050] In some embodiments, the phase advance angle voltage adjustment circuit 10 further includes a current limiting resistor R6, one end of which is connected to the motor speed adjustment input terminal VSP, and the other end of which is connected to the amplification module 12.

[0051] Exemplary, the current limiting resistor R6 may be a chip resistor, one end of which is connected to the motor speed adjustment input terminal VSP, and the other end of which is connected to the first pole of the amplification transistor Q1. The magnitude of the current limiting resistor R6 can be selected according to the actual situation, and there are no specific size limitations; for example, in this application, the current limiting resistor R6 may be 1 kilohm.

[0052] In this way, by installing the current limiting resistor R6, it is possible to prevent damage to the amplification transistor Q1 by the pulse current generated at the moment of power supply and power cut-off, thereby ensuring the safety of the amplification transistor Q1.

[0053] Figure 4 combines the two figures, showing the actual adjustment results obtained by adjusting the optimal efficiency value at each rotational speed point using a potentiometer when the motor device 100 is operating at specified rotational speed points under the full load of the equipment. It also shows the measurement results of the relationship between the phase-advancing angle voltage and the change in the motor speed adjustment signal, measured using the phase-advancing angle voltage adjustment circuit 10 of the present invention. A comparison of the curves shows that the phase-advancing angle with the phase-advancing angle voltage adjustment circuit 10 installed corresponds to the optimal effect actually achieved, thereby increasing the reliability of the phase-advancing angle voltage adjustment circuit 10 of the present invention.

[0054] In this specification, any reference to terms such as “one embodiment,” “several embodiments,” “exemplary embodiment,” “example,” “specific example,” or “several examples” means that the specific features, structures, materials, or properties described with reference to such embodiment or example are included in at least one embodiment or example of the Application. In this specification, the general expressions of the above terms do not necessarily apply to the same embodiment or example. In addition, the specific features, structures, materials, or properties described may be incorporated in an appropriate manner in any one or more embodiments or examples.

[0055] Although embodiments of the present application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is limited by the claims and their equivalents.

Claims

1. A phase-advancing angle voltage adjustment circuit used in a motor device, wherein the motor device includes a motor control chip, and the phase-advancing angle voltage adjustment circuit is A voltage adjustment module is connected to the motor speed adjustment input terminal and the ground terminal, respectively, and generates a control signal based on the motor speed adjustment signal from the motor speed adjustment input terminal. Each is connected to the motor speed adjustment input terminal and the voltage adjustment module, respectively, and includes an amplification module for generating an adjustment voltage based on the control signal and the motor speed adjustment signal, A phase-advancing angle voltage adjustment circuit comprising: a phase-advancing angle voltage generation module connected to a stable voltage output terminal, the amplification module, and the motor control chip, respectively, which generates a phase-advancing angle voltage based on the adjustment voltage and the output voltage of the stable voltage output terminal and outputs it to the motor control chip, so that the motor control chip sets the phase-advancing angle based on the phase-advancing angle voltage.

2. The aforementioned voltage adjustment module is A first resistor, one end of which is connected to the motor speed adjustment input terminal and the other end of which is connected to the amplification module, The phase advance angle voltage adjustment circuit according to claim 1, further comprising a second resistor, one end of which is connected to the first resistor and the amplification module, and the other end of which is connected to the ground terminal.

3. The aforementioned amplification module is A phase-advancing angle voltage adjustment circuit according to claim 1 or 2, comprising an amplifying transistor whose first pole is connected to the motor speed adjustment input terminal, whose second pole is connected to the phase-advancing angle voltage generation module, and whose control pole is connected to the voltage adjustment module.

4. The phase advance angle voltage adjustment circuit according to claim 3, wherein the amplification transistor is a PNP type transistor.

5. The aforementioned amplification module is The phase-advancing angle voltage adjustment circuit according to claim 3 or 4, further comprising an adjustment resistor, one end of which is connected to the second pole of the amplification transistor and the other end of which is connected to the phase-advancing angle voltage generation module.

6. The aforementioned phase advance angle voltage adjustment circuit is The phase advance angle voltage adjustment circuit according to any one of claims 3 to 5, further comprising a temperature compensation diode whose positive electrode is connected to the first electrode of the amplification transistor and whose negative electrode is connected to the control electrode of the amplification transistor.

7. The aforementioned phase advance angle voltage generation module is A third resistor, one end of which is connected to the stable voltage output terminal and the other end of which is connected to the amplification module, A phase-advancing angle voltage adjustment circuit according to any one of claims 1 to 6, comprising a fourth resistor, one end of which is connected to the third resistor and the amplification module, and the other end of which is connected to the ground terminal.

8. The aforementioned phase advance angle voltage generation module is The phase-advancing angle voltage adjustment circuit according to claim 7, further comprising a filter capacitor having one end connected to the fourth resistor and the other end connected to the ground terminal.

9. The aforementioned phase advance angle voltage adjustment circuit is The phase advance angle voltage adjustment circuit according to any one of claims 1 to 8, further comprising a current limiting resistor having one end connected to the motor speed adjustment input terminal and the other end connected to the amplification module.

10. A motor device comprising a phase advance angle voltage adjustment circuit according to any one of claims 1 to 9.

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