Lead angle voltage regulation circuit and motor apparatus

Abstract

A lead angle voltage regulation circuit (10) and a motor apparatus (100). The lead angle voltage regulation circuit (10) comprises a voltage regulation module (11), an amplification module (12), and a lead angle voltage generation module (13) which are successively connected. The voltage regulation module (11) is connected to a motor speed regulation input end (VSP), the amplification module (12) is connected to the motor speed regulation input end (VSP), and the lead angle voltage generation module (13) is connected to a regulated voltage output end (VREG) and a motor control chip (20), respectively.

Description

Lead angle voltage regulation circuit and motor device

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 2023110357993 filed with the State Intellectual Property Office of China on August 16, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of air conditioning, and in particular to a lead-angle voltage regulation circuit and a motor device. Background Art

[0004] Currently, brushless DC motor control technology integrates motor control, drive, and power devices into a single driver chip. This control scheme, which enables motor operation and speed regulation solely through an external input voltage signal, offers advantages such as fast response, simple control, and high cost-effectiveness, making it widely used in the brushless DC motor control field. Driver chips using this hardware control method typically include a lead angle voltage adjustment interface. This voltage is adjusted to optimize the motor's efficiency by adjusting the lead angle.

[0005] However, since the lead angle required for a DC motor operating at different speeds is often different (generally, the higher the operating speed, the larger the required lead angle), and the current lead angle is usually set to a fixed value, it is difficult to take into account the efficiency at different speed points. Summary of the Invention

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a lead angle voltage regulation circuit and a motor device.

[0007] The lead angle voltage regulation circuit of the embodiment of the present application is used in a motor device, wherein the motor device includes a motor control chip, and the lead angle voltage regulation circuit includes:

[0008] a voltage regulating module, connected to the motor speed regulating input terminal and the ground terminal respectively, and configured to generate a control signal according to the motor speed regulating signal at the motor speed regulating input terminal;

[0009] an amplifying module, the amplifying module being connected to the motor speed regulation input terminal and the voltage regulating module respectively, and being configured to generate a regulating voltage according to the control signal and the motor speed regulation signal;

[0010] The lead angle voltage generation module is respectively connected to the voltage stabilization output terminal, the amplification module and the motor control chip, and is used to generate a lead angle voltage according to the adjustment voltage and the output voltage of the voltage stabilization output terminal and output it to the motor control chip, so that the motor control chip sets the lead angle according to the lead angle voltage.

[0011] In some embodiments, the voltage regulation module includes:

[0012] a first resistor, one end of the first resistor being connected to the motor speed control input terminal, and the other end being connected to the amplification module;

[0013] a second resistor, one end of the second resistor being connected to the first resistor and the amplifying module, and the other end of the second resistor being connected to the ground end.

[0014] In some embodiments, the amplification module comprises:

[0015] an amplifying transistor, wherein a first electrode of the amplifying transistor is connected to the motor speed regulating input terminal, a second electrode is connected to the lead angle voltage generating module, and a control electrode is connected to the voltage regulating module.

[0016] In some embodiments, the amplifying transistor is a PNP transistor.

[0017] In some embodiments, the lead angle voltage regulation circuit further includes:

[0018] An adjusting resistor has one end connected to the second electrode of the amplifying transistor and the other end connected to the leading angle voltage generating module.

[0019] In some embodiments, the lead angle voltage regulation circuit further includes:

[0020] A temperature compensation diode, wherein the anode of the temperature compensation diode is connected to the first electrode of the amplifying transistor, and the cathode of the temperature compensation diode is connected to the control electrode of the amplifying transistor.

[0021] In some embodiments, the lead angle voltage generating module includes:

[0022] a third resistor, one end of the third resistor being connected to the voltage stabilization output end, and the other end being connected to the amplification module;

[0023] a fourth resistor, one end of the fourth resistor being connected to the third resistor and the amplifying module, and the other end of the fourth resistor being connected to the ground.

[0024] In some embodiments, the lead angle voltage regulation circuit further includes:

[0025] A filter capacitor has one end connected to the fourth resistor and the other end connected to the ground.

[0026] In some embodiments, the lead angle voltage regulation circuit further includes:

[0027] A current limiting resistor, one end of which is connected to the motor speed control input terminal, and the other end of which is connected to the amplification module.

[0028] The motor device according to the embodiment of the present application includes the lead-angle voltage regulation circuit.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] FIG1 is a module diagram of a lead angle voltage regulation circuit according to an embodiment of the present application.

[0032] FIG2 is a schematic diagram of a module of a motor device according to an embodiment of the present application.

[0033] FIG3 is a schematic diagram of a scenario of a lead angle voltage test at different temperatures according to an embodiment of the present application.

[0034] FIG4 is a schematic diagram of optimization lead angle adjustment results at various speeds of the motor device according to an embodiment of the present application. Modes for Carrying Out the Invention

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0038] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0040] Please refer to Figure 1 and Figure 2. An embodiment of the present application provides a lead-angle voltage regulation circuit 10 for a motor device 100. The motor device 100 includes a motor control chip 20. The lead-angle voltage regulation circuit 10 includes a voltage regulation module 11, an amplification module 12 and a lead-angle voltage generation module 13.

[0041] The voltage regulation module 11 is respectively connected to the motor speed regulation input terminal VSP and the ground terminal GND, and is used to generate a control signal according to the motor speed regulation signal of the motor speed regulation input terminal VSP. The amplification module 12 is respectively connected to the motor speed regulation input terminal VSP and the voltage regulation module 11, and is used to generate a regulation voltage according to the control signal and the motor speed regulation signal. The lead angle voltage generation module 13 is respectively connected to the voltage stabilization output terminal VREG, the amplification module 12 and the motor control chip 20, and is used to generate a lead angle voltage according to the regulation voltage and the output voltage of the voltage stabilization output terminal VREG and output it to the motor control chip 20, so that the motor control chip 20 sets the lead angle according to the lead angle voltage.

[0042] The present application also provides a motor device 100 , which includes the above-mentioned lead-angle voltage regulation circuit 10 .

[0043] In the lead-angle voltage regulation circuit 10 of the embodiment of the present application, a control signal is generated by the voltage regulation module 11 according to the motor speed regulation signal of the motor speed regulation input terminal VSP, and a regulation voltage is generated by the amplification module 12 according to the control signal and the motor speed regulation signal. The lead-angle voltage is generated by the lead-angle voltage according to the regulation voltage and the output voltage of the voltage stabilization output terminal VREG, so that the lead-angle voltage can be associated with the motor speed regulation signal, so that the working efficiency of the motor device 100 at different speed points is optimized.

[0044] Exemplarily, the motor device 100 may be a brushless DC motor, wherein the motor device 100 may include a motor control chip 20, and components such as motor control, drive and power devices of the motor device 100 are integrated on the motor control chip 20. The operation and speed regulation functions of the motor device 100 can be realized by simply inputting an external voltage signal to the motor control chip 20.

[0045] Motor control chip 20 includes a lead-angle setting pin LA and a motor speed control pin LB. Lead-angle setting pin LA can be connected to lead-angle voltage generation module 13 of lead-angle voltage regulation circuit 10 to obtain a lead-angle voltage. Motor speed control pin LB can be connected to motor speed control input terminal VSP to receive a motor speed control signal from motor speed control input terminal VSP. Motor control chip 20 can set the lead angle based on the lead-angle voltage and adjust the speed based on the motor speed control signal.

[0046] The motor speed control signal outputted by the motor speed control input terminal VSP may be a voltage signal, that is, the motor speed control input terminal outputs a voltage value.

[0047] Please refer to Figure 2. In some embodiments, the voltage regulation module 11 includes a first resistor R1 and a second resistor R2, wherein one end of the first resistor R1 is connected to the motor speed control 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.

[0048] The first resistor R1 and the second resistor R2 can be adjusted according to the actual measurement conditions of the motor device 100 and the load. The specific resistance value is not limited. In order to prevent the current at the motor speed control input terminal VSP from being too high due to the small resistance value, thereby affecting the driving capability of the speed control port of the entire machine, the first resistor R1 and the second resistor R2 are selected to be as large as possible. For example, in this embodiment, the first resistor R1 can be 100,000 ohms, and the second resistor R2 can be 1 megohm.

[0049] In some embodiments, the amplifying module 12 includes an amplifying transistor Q1, the first electrode of the amplifying transistor Q1 is connected to the motor speed control input terminal VSP, the second electrode of the amplifying transistor Q1 is connected to the lead angle voltage generating module 13, and the control electrode of the amplifying transistor Q1 is connected to the voltage regulating module 11.

[0050] It should be noted that in this embodiment, the first electrode of the amplifier transistor Q1 may be a base electrode, the second electrode of the amplifier transistor Q1 may be a collector electrode, and the control electrode of the amplifier transistor Q1 may be an emitter electrode. The emitter electrode is used to provide charge carriers to the collector electrode through the base region. The collector electrode collects most of the charge carriers emitted from the emitter electrode and serves as a base electrode for controlling the amount of current flowing from the emitter electrode to the collector electrode.

[0051] Exemplarily, the amplifier transistor Q1 is a PNP transistor. Those skilled in the art will appreciate that a PNP transistor is composed of three differently doped semiconductor materials: a P-type semiconductor, an N-type semiconductor, and a P-type semiconductor. The P-type semiconductor has a higher doping concentration than the N-type semiconductor, which in turn has a higher doping concentration than the second P-type semiconductor. A PNP transistor has two states: on and off. When the base voltage of the PNP transistor is higher than the emitter voltage and the collector voltage is lower than the emitter voltage, the transistor is in the on state.

[0052] In some embodiments, the lead angle voltage regulating circuit 10 further includes a temperature compensation diode D1 , wherein the anode of the temperature compensation diode D1 is connected to the first electrode of the amplifier transistor Q1 , and the cathode of the temperature compensation diode D1 is connected to the control electrode of the amplifier transistor Q1 .

[0053] As can be understood, the PN junction in a PNP transistor is significantly 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. Temperature compensation diode D1 is connected to the base and emitter of amplifier transistor Q1. When the temperature rises, temperature compensation diode D1 conducts, reducing the voltage drop, which causes the base voltage Vb of amplifier transistor Q1 to increase, causing the base current Ib of amplifier transistor Q1 to decrease. In this way, temperature compensation diode D1 compensates for the increase in base current Ib of amplifier transistor Q1 caused by temperature. When the temperature decreases, temperature compensation diode D1 conducts, causing the base voltage Vb of amplifier transistor Q1 to decrease, compensating for the base current Ib of amplifier transistor Q1.

[0054] In this embodiment, the temperature compensation diode D1 may be a diode with a turn-on voltage of approximately 0.7V.

[0055] Please refer to Figure 3 to verify the impact of temperature on the lead-angle voltage regulation circuit 10 of the present application. The lead-angle voltage is tested under different temperatures and the same speed regulation voltage input conditions. From the test results, it can be seen that the effect of temperature on the lead-angle voltage is very small, which means that after adding the temperature compensation diode D1, the influence of temperature on the temperature drift of the amplifier transistor Q1 can be effectively prevented.

[0056] In this way, by connecting the temperature compensation diode D1 to the first electrode and the control electrode of the amplifier transistor Q1 respectively, the influence of temperature on the amplifier transistor Q1 can be compensated, thereby improving the stability of the lead angle voltage control by the lead angle voltage regulation circuit 10.

[0057] In some embodiments, the amplifying module 12 further includes an adjusting resistor R5 .

[0058] Exemplarily, one end of regulating resistor R5 is connected to the second electrode of amplifying transistor Q1, and the other end of regulating resistor R5 is connected to lead-angle voltage generating module 13. Regulating resistor R5 is used to regulate the current and voltage of the second electrode of amplifying transistor Q1, thereby providing a regulated voltage to lead-angle voltage generating module 13.

[0059] The regulating resistor R5 can be adjusted according to the actual measured conditions of the motor and the load, and the specific value is not limited. For example, in this embodiment, the regulating resistor R5 is 3 kilo-ohms.

[0060] In some embodiments, the lead-angle voltage generating module 13 includes a third resistor R3 and a fourth resistor R4, wherein one end of the third resistor R3 is connected to the voltage regulator output terminal VREG, 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.

[0061] Specifically, a third resistor R3 and a fourth resistor R4 are connected in series, with the third resistor R3 connected to the voltage regulator output terminal VREG, and the fourth resistor R4 connected to the ground terminal GND. Furthermore, an adjustment resistor R5 and a lead angle setting pin LA can be connected to the third and fourth resistors R3 and R4 at their junction. The third and fourth resistors R3 and R4 can be used to generate an initial lead angle voltage for the motor control chip 20. The lead angle voltage is the sum of the adjustment voltage and the voltage across the fourth resistor R4. When the amplifier transistor Q1 is turned off, the adjustment voltage is 0, and the voltage across the fourth resistor R4 serves as the initial lead angle voltage. The values ​​of the third and fourth resistors R3 and R4 can be set based on the lead angle voltage, with no specific limitation. For example, in this embodiment, if the initial lead angle is 0.45V, the third resistor R3 can be 1 megohm, and the fourth resistor R4 can be 100,000 ohms.

[0062] In this way, by setting the third resistor R3 and the fourth resistor R4, an initial lead angle voltage can be generated.

[0063] In some embodiments, the lead angle voltage regulating circuit 10 further includes a filter capacitor C1 , one end of the filter capacitor C1 is connected to the lead angle voltage generating module 13 , and the other end of the filter capacitor C1 is connected to the ground terminal GND.

[0064] For example, one end of filter capacitor C1 is connected to the junction of third resistor R3 and fourth resistor R4, and the other end is connected to ground GND, thereby filtering out clutter signals in the lead-angle voltage. As will be appreciated, clutter signals are generated during power-on and power-off moments, which can easily lead to instability in the lead-angle voltage. However, the provision of filter capacitor C1 can filter out clutter signals in the lead-angle voltage. In this embodiment, the capacitance of filter capacitor C1 can be 0.1 microfarad.

[0065] In this way, by setting the filter capacitor C1, the influence of noise interference on the lead angle voltage is avoided.

[0066] In some embodiments, the lead angle voltage regulation circuit 10 further includes a current limiting resistor R6 , one end of which is connected to the motor speed regulation input terminal VSP, and the other end of which is connected to the amplification module 12 .

[0067] Exemplarily, the current-limiting resistor R6 can be a chip resistor, one end of which is connected to the motor speed control input terminal VSP, and the other end of which is connected to the first electrode of the amplifier transistor Q1. The size of the current-limiting resistor R6 can be selected based on actual conditions and is not particularly limited. For example, in this application, the current-limiting resistor R6 can be 1 kiloohm.

[0068] In this way, by setting the current limiting resistor R6, the pulse current at the moment of power on and off can be prevented from damaging the amplifier transistor Q1, thereby ensuring the safety of the amplifier transistor Q1.

[0069] Please refer to Figure 4, which shows the actual debugging results of adjusting the optimal efficiency value of each speed point by the potentiometer when the motor device 100 is running at a specified speed point on the entire machine load, as well as the test results of the measured relationship between the lead angle voltage and the motor speed control signal after using the lead angle voltage regulation circuit 10 of the present application. From the comparison of the curves, it can be concluded that the lead angle equipped with the lead angle voltage regulation circuit 10 is equivalent to the optimal effect of actual debugging, thereby verifying the reliability of the lead angle voltage regulation circuit 10 of the present application.

[0070] Throughout this specification, reference to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0071] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A lead angle voltage regulating circuit for a motor device, wherein the motor device comprises a motor control chip, and the lead angle voltage regulating circuit comprises: A voltage regulation module, connected to the motor speed regulation input terminal and the ground terminal respectively, and used for generating a control signal according to the motor speed regulation signal at the motor speed regulation input terminal; an amplification module, connected to the motor speed regulation input terminal and the voltage regulation module respectively, and used for generating a regulation voltage according to the control signal and the motor speed regulation signal; The lead angle voltage generating module is respectively connected to the voltage stabilizing output terminal, the amplifying module and the motor control chip, and is used to generate a lead angle voltage according to the regulating voltage and the output voltage of the voltage stabilizing output terminal and output it to the motor control chip, so that the motor control chip sets the lead angle according to the lead angle voltage.

2. The lead angle voltage regulating circuit according to claim 1, wherein: The voltage regulation module comprises: A first resistor, one end of which is connected to the motor speed control input terminal, and the other end of which is connected to the amplification module; A second resistor has one end connected to the first resistor and the amplifying module, and the other end connected to the ground.

3. The lead angle voltage regulating circuit according to claim 1 or 2, wherein: The amplification module comprises: An amplifier transistor, wherein a first electrode of the amplifier transistor is connected to the motor speed control input terminal, a second electrode is connected to the lead angle voltage generating module, and a control electrode is connected to the voltage regulating module.

4. The lead angle voltage regulating circuit according to claim 3, wherein: The amplifying transistor is a PNP transistor.

5. The lead angle voltage regulating circuit according to claim 3 or 4, wherein: The amplification module includes: An adjusting resistor has one end connected to the second electrode of the amplifying transistor and the other end connected to the leading angle voltage generating module.

6. The lead angle voltage regulating circuit according to claims 3-5, wherein: The lead angle voltage regulating circuit further comprises: A temperature compensation diode, wherein the anode of the temperature compensation diode is connected to the first electrode of the amplifying transistor, and the cathode of the temperature compensation diode is connected to the control electrode of the amplifying transistor.

7. The lead angle voltage regulating circuit according to claims 1-6, wherein: The leading angle voltage generating module comprises: A third resistor, one end of which is connected to the voltage stabilization output end, and the other end of which is connected to the amplification module; A fourth resistor has one end connected to the third resistor and the amplifying module, and the other end connected to the ground.

8. The lead angle voltage regulating circuit according to claim 7, wherein: The leading angle voltage generating module further includes: A filter capacitor has one end connected to the fourth resistor and the other end connected to the ground.

9. The lead angle voltage regulating circuit according to claims 1-8, wherein: The lead angle voltage regulating circuit further comprises: A current limiting resistor, one end of which is connected to the motor speed control input terminal, and the other end of which is connected to the amplification module.

10. An electric machine device, wherein: The invention comprises the lead angle voltage regulating circuit as described in any one of claims 1 to 9.

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