Miniaturized fan controller circuit

Abstract

The utility model belongs to the field of direct current fan / motor controllers, and discloses a miniaturized fan controller circuit, which comprises a power supply circuit, a Hall circuit, a singlechip control circuit and a stator duplex winding drive circuit, the power supply circuit is connected with the Hall sensor, the Hall circuit, the single-chip microcomputer control circuit and the stator duplex winding drive circuit. The input end of the Hall circuit is connected with the Hall sensor on the rotor, and the output end of the Hall circuit is connected with the single-chip microcomputer control circuit. The output end of the single-chip microcomputer control circuit is connected with the stator double-winding drive circuit, one end of a motor winding is connected with the output end of the stator double-winding drive circuit, and the other end of the motor winding is connected with the power supply circuit. The circuit provided by the utility model can be arranged in a limited mechanical structure space, can quickly realize the start and stop of the fan, and has the advantages of miniaturization, reliable start performance, stable acceleration, high control precision, strong robustness and the like.

Description

Technical Field

[0001] The utility model belongs to the field of DC fan / motor controllers, relates to controller control circuit design technology, and specifically relates to a miniaturized fan controller circuit. Background Art

[0002] A DC fan is a motor that can convert DC electrical energy into mechanical energy, and includes two types: a brushed DC motor and a brushless DC motor. For example, a brushless DC fan is a mechatronic product consisting of a fan body and a controller.

[0003] At present, with the continuous compression of the mechanical structure space of the fan body under special environments, the demand for the localization and miniaturization of the fan design is getting higher and higher. In this case, it is necessary to design a controller oriented to localization and miniaturization, and realize the start and stop control and monitoring of the fan in a limited space through the control circuit of the controller. Utility Model Content

[0004] In order to control the start and stop of the fan and monitor the working condition of the fan within a limited mechanical structure space, the utility model discloses a miniaturized fan controller circuit with reliable starting performance, stable acceleration, high control accuracy and strong robustness. The fan controller circuit includes a power supply circuit, a Hall circuit, a single-chip microcomputer control circuit and a stator dual-winding drive circuit.

[0005] Among them, the power supply circuit is connected to the Hall sensor, the Hall circuit, the single-chip control circuit and the stator dual-winding drive circuit; the input end of the Hall circuit is connected to the Hall sensor on the rotor, and the output end is connected to the single-chip control circuit; the output end of the single-chip control circuit is connected to the stator dual-winding drive circuit, one end of the motor winding is connected to the output end of the stator dual-winding drive circuit, and the other end is connected to the power supply circuit.

[0006] Furthermore, the power supply circuit includes a DC power supply, an anti-reverse circuit, a voltage stabilizing filter circuit, and a step-down circuit. The input end of the anti-reverse circuit is connected to the positive terminal of the DC power supply, and the output end is connected to the Hall sensor and the step-down circuit respectively. The output end of the step-down circuit is connected to the single-chip microcomputer control circuit and the Hall circuit; the voltage stabilizing filter circuit is connected across the positive and negative terminals of the DC power supply.

[0007] Furthermore, the anti-reverse circuit includes an anti-reverse diode D3 and a current limiting resistor R11 connected in series, the voltage stabilizing filter circuit includes a voltage stabilizing diode D2 and a filter capacitor C10 connected in parallel, and the step-down circuit includes a step-down chip U2 and a filter capacitor component, and the filter capacitor component is connected across the output end of the step-down chip U2 and the negative end of the DC power supply.

[0008] Furthermore, the power supply circuit also includes a TVS transient suppression diode and a current limiting resistor R12, the input end of the current limiting resistor R12 is connected to the external interface, and the output end is connected to the FPS network node and the TVS transient suppression diode respectively, the output end of the TVS transient suppression diode is connected to the negative end of the DC power supply, and the TVS transient suppression diode and the current limiting resistor R12 form a transient protection circuit.

[0009] Furthermore, the Hall circuit includes a resistor R4, a resistor R8 and a capacitor C1, the two ends of the resistor R4 are respectively connected to the power supply circuit and the output end of the Hall sensor, one end of the resistor R8 is connected to the output end of the Hall sensor, and the other end is respectively connected to the input end of the single-chip control circuit and the capacitor C1, and the other end of the capacitor C1 is grounded.

[0010] Furthermore, the single-chip microcomputer control circuit includes a single-chip microcomputer U1 and a transistor Q4, the base of the transistor Q4 is connected to the input end of the single-chip microcomputer U1 through a current-limiting resistor R6, the emitter of the transistor Q4 is grounded, and the collector of the transistor Q4 is connected to the output end of the FPS network node.

[0011] Furthermore, the single chip control circuit further includes a pull-up resistor R9, one end of the pull-up resistor R9 is connected to the collector of the transistor Q4, and the other end is connected to the power supply circuit.

[0012] Furthermore, the stator dual-winding drive circuit includes two commutation circuits with the same structure, the input ends of the two commutation circuits are connected to the single-chip control circuit, the output end of one of the commutation circuits is connected to the head end of the stator dual winding and the positive end of the power supply circuit, the output end of the other commutation circuit is connected to the end of the stator dual winding, and the other end of the motor winding is connected to the negative end of the power supply circuit.

[0013] Furthermore, in the stator dual-winding drive circuit, the commutation circuit connected to the end of the stator dual-winding includes a field-effect MOSFET Q1, a current-limiting resistor R5, a pull-up resistor R1 and a filter capacitor C4, and the commutation circuit connected to the head end of the stator dual-winding includes a field-effect MOSFET Q2, a current-limiting resistor R2, a pull-up resistor R3 and a filter capacitor C3.

[0014] Furthermore, the other end of the motor winding is connected to the negative terminal of the power supply circuit via a winding connection circuit, and the winding connection circuit includes an anti-reverse diode D1, a filter capacitor C8 and a filter capacitor C9.

[0015] The fan controller circuit designed by the utility model can be arranged in a limited mechanical structure space. It can quickly realize the start and stop of the fan. It has the advantages of reliable starting performance, stable acceleration, high control accuracy and strong robustness. It can be widely used in the speed measurement and start and stop control of brushless DC motors, and has broad application prospects and markets. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0017] Figure 1 This is a system block diagram of the fan controller circuit disclosed in the utility model;

[0018] Figure 2 This is a schematic diagram of the anti-reverse circuit, voltage stabilization and filtering circuit, transient protection circuit, and winding connection circuit in the fan controller circuit disclosed in the utility model;

[0019] Figure 3 The utility model discloses a schematic diagram of a step-down circuit, a single-chip microcomputer control circuit, a stator double-winding drive circuit, and a Hall circuit in the fan controller circuit. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings. The advantages and features of the present utility model will become clearer as the description progresses, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the various details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features of the embodiments can be combined with each other in the absence of conflict. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present application.

[0021] The utility model discloses a miniaturized fan controller circuit. Figure 1As shown, the fan controller circuit includes a power supply circuit, a Hall effect circuit, a single-chip microcomputer control circuit, and a stator dual-winding drive circuit. The power supply circuit is connected to the Hall effect sensor, the Hall effect circuit, the single-chip microcomputer control circuit, and the stator dual-winding drive circuit. The Hall effect circuit has an input connected to the Hall effect sensor on the rotor and an output connected to the single-chip microcomputer control circuit. The output of the single-chip microcomputer control circuit is connected to the stator dual-winding drive circuit. One end of the motor winding is connected to the output of the stator dual-winding drive circuit, and the other end is connected to the power supply circuit.

[0022] In specific implementation, the power supply circuit provides working power for each component in the entire controller circuit. The Hall circuit is used to obtain the switching signal of the Hall sensor on the rotor and input it into the single-chip microcomputer control circuit. After processing by the single-chip microcomputer control circuit, the PHB signal and PHA signal are output. The PHB signal and PHA signal are output to the stator dual-winding drive circuit to control the operation of the stator dual-winding.

[0023] Further, see Figure 1 、 Figure 2 and Figure 3 As shown, the power supply circuit includes a DC power supply, an anti-reverse circuit, a voltage stabilizing filter circuit and a step-down circuit. The DC power supply supplies power to the entire system. The input end of the anti-reverse circuit is connected to the positive end of the DC power supply (such as Figure 2 The output end is connected to the Hall sensor and the step-down circuit respectively, and the output end of the step-down circuit is connected to the single-chip control circuit and the Hall circuit; the voltage stabilizing filter circuit is connected across the positive and negative ends of the DC power supply (as shown in Figure 2 The anti-reverse circuit prevents circuit damage due to reverse power connection, the voltage stabilization and filtering circuit provides a stable DC voltage, and the step-down circuit protects the circuit from excessive transient voltages.

[0024] Further, see Figure 2 As shown, the anti-reverse circuit includes an anti-reverse diode D3 and a current limiting resistor R11 connected in series, the voltage stabilizing filter circuit includes a voltage stabilizing diode D2 and a filter capacitor C10 connected in parallel, and the step-down circuit includes a step-down chip U2 and a filter capacitor component, and the filter capacitor component is connected across the output end of the step-down chip U2 and the negative end of the DC power supply, wherein the filter capacitor component includes multiple parallel filter capacitors, for example Figure 2The filter capacitors C5, C6, and C2 shown in FIG can be of the same or different sizes. After voltage reduction, they can provide a 5V voltage for the microcontroller control circuit, the stator dual-winding drive circuit, the Hall effect circuit, etc. In the specific implementation of the present invention, the step-down chip U2 can be an LDO linear step-down chip or a DC-CD step-down chip.

[0025] Further, see Figure 2 As shown, the power supply circuit further includes a TVS transient suppression diode and a current limiting resistor R12, the input end of the current limiting resistor R12 is connected to the external interface E15 (such as Figure 2 The output end is connected to the FPS network node and the TVS transient suppression diode respectively. The output end of the TVS transient suppression diode is connected to the negative end of the DC power supply. The TVS transient suppression diode and the current limiting resistor R12 form a transient protection circuit. Among them, the FPS network node is a frequency acquisition node, which is connected to the single-chip microcomputer U1 through the transistor Q4, and is connected to the single-chip microcomputer U1 through the pull-up resistor R9 and the current limiting resistor R6. The frequency acquisition of this network point is realized by the single-chip microcomputer U1, which is converted into the corresponding fan speed measurement. The external interface E15 is an external interface, which is equivalent to the output end. An external tachometer or oscilloscope can be used to obtain the speed. The input end is the PFS interface of the single-chip microcomputer, which is connected to the output end E15 through the current limiting resistor R12. R12 plays a current limiting protection role. The FPS port voltage is about 5V. After passing through the resistor R12, the current is reduced, which plays a current limiting protection role.

[0026] Further, see Figure 3 As shown, the Hall circuit includes a resistor R4, a resistor R8 and a capacitor C1. The two ends of the resistor R4 are respectively connected to the power supply circuit and the output end of the Hall sensor. One end of the resistor R8 is connected to the output end of the Hall sensor, and the other end is respectively connected to the input end of the single-chip control circuit and the capacitor C1. The other end of the capacitor C1 is grounded.

[0027] Further, see Figure 3 As shown, the single-chip microcomputer control circuit includes a single-chip microcomputer U1 and a transistor Q4, the base of the transistor Q4 is connected to the input end of the single-chip microcomputer U1 through a current-limiting resistor R6, the emitter of the transistor Q4 is grounded, and the collector of the transistor Q4 is connected to the output end of the FPS network node.

[0028] Further, see Figure 3As shown, the single-chip microcomputer control circuit also includes a pull-up resistor R9, one end of which is connected to the collector of the transistor Q4 and the other end to the power circuit. When the fan controller is operating, the switch signal HALL collected by the Hall sensor is input to the single-chip microcomputer U1. The single-chip microcomputer U1 processes the switch signal HALL and outputs the corresponding switch signals PHA and PHB, thereby controlling the stator dual winding drive circuit and achieving rotation of the stator dual winding.

[0029] Furthermore, the stator dual winding drive circuit includes two commutation circuits with the same structure, the input ends of the two commutation circuits are connected to the single chip control circuit, the output end of one of the commutation circuits is connected to the first end of the stator dual winding and the positive terminal of the power supply circuit, the output end of the other commutation circuit is connected to the end of the stator dual winding, and the other end of the motor winding is connected to the negative terminal of the power supply circuit. Specifically, see Figure 3 As shown, by controlling the on / off of the two commutation circuits through the switch signal PHA and the switch signal PHB, the stator dual-winding drive circuit can be switched on and off, thereby driving the motor windings to rotate the fan.

[0030] Further, see Figure 3 As shown, in the stator dual-winding drive circuit, the commutation circuit connected to the end of the stator dual-winding includes a field-effect MOSFET Q1, a current-limiting resistor R5, a pull-up resistor R1 and a filter capacitor C4, and the commutation circuit connected to the head end of the stator dual-winding includes a field-effect MOSFET Q2, a current-limiting resistor R2, a pull-up resistor R3 and a filter capacitor C3.

[0031] Further, see Figure 2 As shown, the other end of the motor winding is connected to the negative terminal of the power supply circuit via a winding connection circuit. The winding connection circuit includes an anti-reverse diode D1, a filter capacitor C8, and a filter capacitor C9. The anti-reverse diode D1 provides a single-phase conductive anti-reverse function, and supplies power to the stator double windings through the filter capacitors C8 and C9.

[0032] In an improved embodiment of the present invention, see Figure 3 As shown, the fan controller circuit also includes a single-chip microcomputer program download circuit, which is connected to the single-chip microcomputer control circuit to download the program to the single-chip microcomputer control circuit for product debugging.

[0033] The fan controller circuit designed by the utility model can be arranged in a limited mechanical structure space. It can quickly realize the start and stop of the fan. It has the advantages of reliable starting performance, stable acceleration, high control accuracy and strong robustness. It can be widely used in the speed measurement and start and stop control of brushless DC motors, and has broad application prospects and markets.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0035] In addition, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A miniaturized fan controller circuit, characterized in that: It includes a power supply circuit, a Hall circuit, a single-chip microcomputer control circuit and a stator dual-winding drive circuit. The power supply circuit is connected to the Hall sensor, the Hall circuit, the single-chip microcomputer control circuit and the stator dual-winding drive circuit; the input end of the Hall circuit is connected to the Hall sensor on the rotor, and the output end is connected to the single-chip microcomputer control circuit; the output end of the single-chip microcomputer control circuit is connected to the stator dual-winding drive circuit, one end of the motor winding is connected to the output end of the stator dual-winding drive circuit, and the other end is connected to the power supply circuit.

2. The miniaturized fan controller circuit according to claim 1, characterized in that: The power supply circuit includes a DC power supply, an anti-reverse circuit, a voltage stabilizing and filtering circuit, and a step-down circuit. The input end of the anti-reverse circuit is connected to the positive terminal of the DC power supply, and the output end is respectively connected to the Hall sensor and the step-down circuit. The output end of the step-down circuit is connected to the single-chip microcomputer control circuit and the Hall circuit; the voltage stabilizing and filtering circuit is connected across the positive and negative terminals of the DC power supply.

3. The miniaturized fan controller circuit according to claim 2, characterized in that: The anti-reverse circuit includes an anti-reverse diode D3 and a current limiting resistor R11 connected in series, the voltage stabilizing filter circuit includes a voltage stabilizing diode D2 and a filter capacitor C10 connected in parallel, and the step-down circuit includes a step-down chip U2 and a filter capacitor component, and the filter capacitor component is connected across the output end of the step-down chip U2 and the negative end of the DC power supply.

4. The miniaturized wind turbine controller circuit according to claim 2 or 3, characterized in that: The power supply circuit also includes a TVS transient suppression diode and a current limiting resistor R12. The input end of the current limiting resistor R12 is connected to the external interface, and the output end is connected to the FPS network node and the TVS transient suppression diode respectively. The output end of the TVS transient suppression diode is connected to the negative end of the DC power supply.

5. The miniaturized wind turbine controller circuit according to claim 1, characterized in that: The Hall circuit includes a resistor R4, a resistor R8 and a capacitor C1. The two ends of the resistor R4 are respectively connected to the power supply circuit and the output end of the Hall sensor. One end of the resistor R8 is connected to the output end of the Hall sensor, and the other end is respectively connected to the input end of the single-chip control circuit and the capacitor C1. The other end of the capacitor C1 is grounded.

6. The miniaturized wind turbine controller circuit according to claim 1, characterized in that: The single chip control circuit includes a single chip U1 and a transistor Q4, the base of the transistor Q4 is connected to the input end of the single chip U1 via a current limiting resistor R6, the emitter of the transistor Q4 is grounded, and the collector of the transistor Q4 is connected to the output end of the FPS network node.

7. The miniaturized wind turbine controller circuit according to claim 6, characterized in that: The single chip control circuit further includes a pull-up resistor R9 , one end of which is connected to the collector of the transistor Q4 , and the other end of which is connected to the power supply circuit.

8. The miniaturized wind turbine controller circuit according to claim 1, characterized in that: The stator dual-winding drive circuit includes two commutation circuits with identical structures. The input ends of the two commutation circuits are both connected to the single-chip control circuit. The output end of one of the commutation circuits is connected to the head end of the stator dual winding and the positive end of the power supply circuit. The output end of the other commutation circuit is connected to the end of the stator dual winding, and the other end of the motor winding is connected to the negative end of the power supply circuit.

9. The miniaturized wind turbine controller circuit according to claim 8, characterized in that: The commutation circuit connected to the end of the stator double winding includes a field effect MOSFET Q1, a current limiting resistor R5, a pull-up resistor R1 and a filter capacitor C4, and the commutation circuit connected to the head end of the stator double winding includes a field effect MOSFET Q2, a current limiting resistor R2, a pull-up resistor R3 and a filter capacitor C3.

10. The miniaturized wind turbine controller circuit according to claim 8, characterized in that: The other end of the motor winding is connected to the negative terminal of the power supply circuit via a winding connection circuit, and the winding connection circuit includes an anti-reverse diode D1, a filter capacitor C8 and a filter capacitor C9.

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