CN207530740U - AC motor speed regulating circuit in fan, fan and air conditioner - Google Patents

Abstract

The utility model discloses an alternating current motor speed governing circuit, fan and air conditioner in fan, the speed governing circuit, include: the speed regulation device comprises a plurality of speed regulation units, a plurality of control units and a plurality of control units, wherein each speed regulation unit in the plurality of speed regulation units comprises a controllable switch tube, at least two speed regulation units in the plurality of speed regulation units also comprise speed regulation capacitors, the power supply end of each speed regulation unit is connected to the first end of an alternating current power supply, the speed regulation ends of each speed regulation unit are connected together and then connected with one end of an alternating current motor, and the other end of the alternating current motor is connected with the second end of the alternating current power; the control unit outputs control signals to the plurality of speed regulating units through the plurality of control signal output ends so as to control the controllable switch tube in each speed regulating unit, so that the speed regulating capacitors in at least two speed regulating units are combined, multi-gear speed regulation of the fan is realized, and the control unit is simple in circuit, high in reliability, low in cost and wide in speed regulating range.

Description

AC motor speed regulating circuit in fan, fan and air conditioner

technical field

The utility model relates to the technical field of motors, in particular to an AC motor speed regulating circuit in a fan, a fan and an air conditioner.

Background technique

In order to enable the fan to meet various working conditions, the fan usually has multiple gears.

In related technologies, when performing multi-level speed regulation on the fan, one method is to directly set multiple taps on the auxiliary winding of the motor stator, and realize the fan speed regulation by switching and controlling the multiple taps. Although this method is relatively simple, However, only mechanical speed regulation can be performed, and a lower rotational speed (such as 200rpm) cannot be obtained.

The other is to realize the speed regulation of the fan through the chopping and voltage regulation of the thyristor and the MOS tube, as shown in Figure 1. Although this method can realize electronic speed regulation, the speed regulation circuit is realized by chopping, the motor needs to be powered by a power supply, and the power supply also outputs 310V DC through a rectifier and filter circuit, and at the same time outputs a stable 12V through a transformer, power chip, etc. , 5V electricity to supply power to the control circuit, the circuit structure is complex, the specifications of components (such as withstand voltage value, rated current value) are high, and the cost is high. Moreover, since the chopper technology realizes step-down by changing the duty cycle of the voltage pulse, it will cause instantaneous discharge, which will cause the primary and secondary windings of the motor to have a large voltage difference for a long time, which will easily cause the winding to break down and burn. In addition, chopper speed regulation is not a complete sine wave, the efficiency of fan speed regulation is low, and the temperature rises.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, an object of the utility model is to propose an AC motor speed regulation circuit in a fan, which realizes multi-level speed regulation of the fan through combined control of the speed regulation capacitor, and the circuit is simple, high in reliability, and low in cost. Wide speed range.

Another purpose of the utility model is to provide a fan.

Another purpose of the utility model is to provide an air conditioner.

In order to achieve the above object, the utility model proposes an AC motor speed regulation circuit in a fan, including: a plurality of speed regulation units, each of which includes a controllable switch tube, At least two speed regulation units in the plurality of speed regulation units also include a speed regulation capacitor, the power supply end of each speed regulation unit is connected to the first end of the AC power supply, and the power supply terminal of each speed regulation unit is connected to the first end of the AC power supply. After the speed ends are connected together, they are connected to one end of the AC motor, and the other end of the AC motor is connected to the second end of the AC power supply; the control unit includes a plurality of control signal output ends, and the plurality of Each of the control signal output terminals is respectively connected to the control terminal of the corresponding speed regulation unit, and the control unit outputs control signals to the multiple speed regulation units through the plurality of control signal output terminals to control The controllable switching tube in each speed regulating unit is controlled so that the speed regulating capacitors in the at least two speed regulating units are combined to realize multi-speed speed regulation of the fan.

According to the AC motor speed regulating circuit in the fan of the present invention, the control unit outputs control signals to a plurality of speed regulating units through a plurality of control signal output terminals, so as to control the controllable switching tube in each speed regulating unit, so that at least The speed regulation capacitors in the two speed regulation units are combined to realize multi-speed regulation of the fan, and the circuit is simple, high in reliability, low in cost and wide in speed regulation range.

Further, each speed regulation unit further includes a capacitor filter, and the capacitor filter prevents the controllable switch from shaking when it is turned on or off by filtering the control signal.

Further, the at least two speed regulating units are also provided with a discharge circuit for discharging the speed regulating capacitor.

Specifically, the discharge circuit includes a first resistor and a second resistor, the second resistor is connected in series with the speed regulating capacitor, and the first resistor is connected in parallel with the second resistor connected in series and the speed regulating capacitor.

Specifically, the capacitor filter is an RC filter unit composed of a third resistor and a filter capacitor.

Specifically, the controllable switch tube is a thyristor.

Specifically, the capacitance value of the speed regulating capacitor is 0.5uF˜3uF.

Specifically, the AC motor includes a main winding, an auxiliary winding and a motor capacitor, one end of the main winding is connected to one end of the motor capacitor as one end of the AC motor, and the other end of the motor capacitor is connected to the One end of the auxiliary winding is connected, and the other end of the auxiliary winding is connected with the other end of the main winding to serve as the other end of the AC motor.

In addition, the utility model also proposes a fan, which includes the above-mentioned AC motor speed regulating circuit in the fan.

According to the fan of the utility model, through the above-mentioned AC motor speed regulating circuit, multi-level speed regulation of the fan can be realized, and the circuit is simple, high in reliability, low in cost, and wide in speed regulation range.

In addition, the utility model also proposes an air conditioner, which includes the above-mentioned AC motor speed regulating circuit in the fan.

According to the air conditioner of the embodiment of the utility model, through the above-mentioned AC motor speed regulating circuit, multi-level speed regulation of the fan can be realized, and the circuit is simple, high in reliability, low in cost, and wide in speed regulation range.

Description of drawings

Fig. 1 is the circuit diagram of AC motor speed regulation in the related art;

Fig. 2 is a schematic structural diagram of an AC motor speed regulating circuit in a fan according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an AC motor speed regulating circuit in a fan according to another embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The AC motor speed regulating circuit in the fan, the fan and the air conditioner according to the embodiments of the utility model are described below with reference to the accompanying drawings.

Fig. 2 is a schematic structural diagram of an AC motor speed regulating circuit in a fan according to an embodiment of the present invention. As shown in FIG. 2 , the speed regulating circuit of the AC motor in the fan includes: a plurality of speed regulating units (such as speed regulating unit 11 , speed regulating unit 12 , . . . , speed regulating unit 16 ) and a control unit 20 .

Wherein, each speed regulation unit in the plurality of speed regulation units includes a controllable switch tube (such as controllable switch tube T1, controllable switch tube T2, ..., controllable switch tube T6), and at least one of the plurality of speed regulation units The two speed regulation units also include speed regulation capacitors (such as speed regulation capacitor C1, speed regulation capacitor C2, ..., speed regulation capacitor C5), and the power supply end of each speed regulation unit is connected to the first terminal ACN of the AC power supply. The speed regulating terminals of the two speed regulating units are connected together and then connected to one end of the AC motor M1, and the other end of the AC motor M is connected to the second terminal ACL of the AC power supply. The control unit 20 includes a plurality of control signal output terminals (such as control signal output terminals OUT_1, control signal output terminals OUT_2, ..., control signal output terminals OUT_6), and each control signal output terminal in the plurality of control signal output terminals is respectively connected to a corresponding The control terminal of the speed regulation unit is connected, and the control unit 20 outputs control signals to a plurality of speed regulation units through a plurality of control signal output terminals to control the controllable switch tube in each speed regulation unit, so that at least two speed regulation units The speed regulating capacitors in the unit are combined to realize multi-speed speed regulation of the fan.

In an embodiment of the present invention, the AC motor M1 may be a squirrel-cage motor, the controllable switch tube may be a thyristor, and the capacitance of the speed regulating capacitor may be 0.5uF-3uF.

Specifically, as shown in FIG. 2, the speed regulation capacitor C1, the speed regulation capacitor C2,..., and the speed regulation capacitor C5 are correspondingly set in the speed regulation unit 11, the speed regulation unit 12, ..., and the speed regulation unit 15 respectively, and the The current limiting function realizes the multi-level speed regulation of the fan by combining the speed regulation capacitor.

For example, the capacitance of speed regulating capacitor C1 can be 0.5uF, the capacitance of speed regulating capacitor C2 can be 1uF, the capacitance of speed regulating capacitor C3 can be 1.2uF, and the capacitance of speed regulating capacitor C4 can be 1.5uF. The capacitance value of the fast capacitor C5 can be 2uF. When the fan is running at the first gear, the control unit 20 can output a high-level signal to the controllable switch T6, so that the controllable switch tube T6 is turned on, and the other controllable switch tubes are all in the off state. At this time, the fan Run at the highest speed; when the fan is running at the second gear, the control unit 20 can output a high-level signal to the controllable switch T1, so that the controllable switch T1 is turned on, while other controllable switches are turned off At this time, the fan is running at a higher speed; when the fan is running at the third gear, the control unit 20 can output a high-level signal to the controllable switches T1 and T2 at the same time, so that the controllable switches T1 and T2 are turned on , while the other controllable switch tubes are all in the off state, at this time the fan is running at a moderately high speed; ...; when the fan is running at the sixth gear, the control unit 20 can output a high-level signal to the controllable switch T1 at the same time To T5, the controllable switch tubes T1 to T5 are turned on at the same time, and the controllable switch tube T6 is in the off state. At this time, the fan runs at the lowest speed (breeze gear, 200-350rpm), so as to realize the six gears of the fan. .

In addition, other combinations can also be used, for example, the speed regulating capacitor C2, the speed regulating capacitor C3..., and the speed regulating capacitor C5 each correspond to a gear position, the speed regulating capacitor C2 and the speed regulating capacitor C3 correspond to a gear position, and the speed regulating capacitor C3 corresponds to a gear position. C3 and the speed regulating capacitor C4 correspond to a gear, ..., how to combine the specific gears can be determined according to the speed requirement and the capacitance of the speed regulating capacitor, and the details are not listed here.

According to the AC motor speed regulation circuit in the fan according to the embodiment of the present invention, control signals are output to a plurality of speed regulation units through a plurality of control signal output terminals, so as to control the controllable switch tube in each speed regulation unit, so that at least The speed regulating capacitors in the two speed regulating units are combined, so that not only can realize the multi-speed electronic speed regulation of the fan, but also reduce the complexity of the power supply, the circuit structure is simple, the cost is low, and the safety and reliability are high. Wide speed range.

According to an embodiment of the present utility model, as shown in Figure 2, each speed control unit also includes a capacitor filter (such as capacitor filter 111, capacitor filter 112, ..., capacitor filter 116), and the capacitor filter passes through The control signal is filtered to prevent jitter when the controllable switch is turned on or off.

Further, as shown in FIG. 2, the capacitor filter can be an RC filter unit composed of a third resistor R3 and a filter capacitor C6, so as to prevent the corresponding controllable switch from shaking and cause malfunction, thereby effectively improving the reliability of the circuit. sex.

According to an embodiment of the present utility model, as shown in Figure 3, at least two speed regulating units are also provided with discharge circuits (such as discharge circuits 121, discharge circuits 122, ..., discharge circuits 125) that discharge the speed regulation capacitors. .

Further, as shown in FIG. 3 , the discharge circuit includes a first resistor R1 and a second resistor R2, the second resistor R2 is connected in series with the speed regulating capacitor, and the first resistor R1 is connected in parallel with the series connected second resistor R2 and the speed regulating capacitor. Wherein, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 in the discharge circuit of each speed regulating unit are set according to the corresponding speed regulating capacitor.

Specifically, as shown in FIG. 3 , the speed regulating unit 11 is taken as an example. When the control unit 20 outputs a high-level signal to the controllable switch tube T1, the controllable switch tube T1 is in the conduction state. At this time, the first terminal ACN of the AC power supply, the controllable switch tube T1, the speed regulating capacitor C1, and the AC motor M1, the first end ACL of the AC power supply forms a closed loop, the AC motor M1 starts to work, and at the same time the speed regulating capacitor C1 is charged to full power, and the speed regulation is realized by using the current limiting function of the speed regulating capacitor C1; when the control unit 20 outputs a low level When the signal is sent to the controllable switch tube T1, the controllable switch tube T1 is in the disconnected state, at this time the branch is in the disconnected state, the speed regulating capacitor C1, the first resistor R1 and the second resistor R2 form a closed loop, and the speed regulating capacitor C1 discharges.

According to an embodiment of the present invention, as shown in Figure 3, the AC motor M1 may include a main winding L1, a secondary winding L2 and a motor capacitor C7, and one end of the main winding L1 is connected to one end of the motor capacitor C7 as one end of the AC motor , the other end of the motor capacitor C7 is connected to one end of the secondary winding L2, and the other end of the secondary winding L2 is connected to the other end of the main winding L1 to serve as the other end of the AC motor. The specific structure of the AC motor can be determined according to the actual situation, and this is only used as an example.

Further, in an embodiment of the present invention, the AC motor speed regulating circuit in the blower fan may also include: an oscillating head unit 30, the oscillating head unit 30 includes a controllable switch tube T7, and the power supply end of the oscillating head unit 30 is connected to the first end of the AC power supply CAN, the oscillating end of the oscillating head unit 30 is connected to one end of the synchronous motor M2, and the other end of the synchronous motor M2 is connected to the other end of the AC motor M1 and then connected to the second end ACL of the AC power supply. Moreover, the control unit 20 also includes a shaking head control signal output terminal SW, which is connected to the control terminal of the shaking head unit 30, and the control unit 20 outputs the control shaking head control signal to the shaking head unit 30 through the shaking head control signal output terminal SW, so as to Realize the shaking head function of the fan.

For example, when the fan needs to shake its head, the control unit 20 outputs a high-level signal to the controllable switch tube T7, and the controllable switch tube T7 is turned on. At this time, the first terminal ACN of the AC power supply, the controllable switch tube T7, and the synchronous motor M2 and the second terminal ACL of the AC power supply form a closed loop, and the synchronous motor M2 starts to work.

In addition, the oscillating unit 30 may further include a capacitive filter 31 , and the capacitive filter 31 prevents oscillating when the controllable switch T7 is turned on or off by filtering the oscillating control signal. Further, the capacitor filter 31 is an RC filter unit composed of a third resistor R3 and a filter capacitor C6.

In addition, a thermal protector PT and a fuse Fuse are also provided in the power supply circuit of the AC power supply, so as to realize overheating protection and overcurrent protection through the thermal protector PT and the fuse Fuse.

In summary, according to the AC motor speed regulating circuit in the fan embodiment of the present invention, the control unit outputs control signals to multiple speed regulating units through multiple control signal output terminals, so as to control the controllable switch in each speed regulating unit The tube is controlled so that the speed regulating capacitors in at least two speed regulating units are combined to realize multi-speed speed regulation of the fan, and the circuit is simple, high in reliability, low in cost and wide in speed regulation range.

In addition, the embodiment of the present utility model also proposes a fan, which includes the above-mentioned AC motor speed regulating circuit in the fan.

According to the fan according to the embodiment of the utility model, the multi-speed speed regulation of the fan can be realized through the above-mentioned AC motor speed regulation circuit, and the circuit is simple, high in reliability, low in cost, and wide in a speed regulation range.

In addition, the embodiment of the present utility model also proposes an air conditioner, which includes the above-mentioned AC motor speed regulating circuit in the fan.

According to the air conditioner of the embodiment of the utility model, through the above-mentioned AC motor speed regulating circuit, multi-level speed regulation of the fan can be realized, and the circuit is simple, high in reliability, low in cost, and wide in speed regulation range.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; may be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediary, and may be an internal communication between two elements or an interactive relationship between two elements, unless otherwise stated Clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (10)

1. AC motor speed regulation circuit in a fan, characterized in that, comprising: A plurality of speed regulation units, each of the plurality of speed regulation units includes a controllable switch tube, at least two of the plurality of speed regulation units also include speed regulation capacitors, each of the speed regulation units The power supply ends of each speed regulating unit are connected to the first end of the AC power supply, the speed regulating ends of each speed regulating unit are connected together and connected to one end of the AC motor, and the other end of the AC motor is connected to the AC power supply. The second end of the power supply is connected; A control unit, the control unit includes a plurality of control signal output terminals, each of the control signal output terminals in the plurality of control signal output terminals is respectively connected to the control terminal of the corresponding speed regulating unit, and the control unit passes the A plurality of control signal output terminals output control signals to the plurality of speed regulation units to control the controllable switch in each speed regulation unit, so that the speed regulation capacitors in the at least two speed regulation units Combined to realize multi-level speed regulation of the fan. 2. The AC motor speed regulating circuit in the fan according to claim 1, wherein each speed regulating unit further includes a capacitor filter, and the capacitor filter filters the control signal to prevent The controllable switching tube vibrates when it is turned on or off. 3. The speed regulating circuit of the AC motor in the fan according to claim 1 or 2, characterized in that, the at least two speed regulating units are further provided with a discharge circuit for discharging the speed regulating capacitor. 4. The AC motor speed regulating circuit in the fan according to claim 3, wherein the discharging circuit comprises a first resistor and a second resistor, the second resistor is connected in series with the speed regulating capacitor, and the first A resistor is connected in parallel with the second resistor in series and the speed regulating capacitor. 5. The AC motor speed regulating circuit in a fan according to claim 2, wherein the capacitor filter is an RC filter unit composed of a third resistor and a filter capacitor. 6. The speed regulating circuit of an AC motor in a fan according to claim 1, wherein the controllable switch tube is a thyristor. 7 . The speed regulating circuit of an AC motor in a fan according to claim 1 , wherein the capacitance of the speed regulating capacitor is 0.5uF˜3uF. 8. The speed regulating circuit of an AC motor in a fan according to claim 1, wherein the AC motor comprises a main winding, an auxiliary winding and a motor capacitor, and after one end of the main winding is connected to one end of the motor capacitor As one end of the AC motor, the other end of the motor capacitor is connected to one end of the secondary winding, and the other end of the secondary winding is connected to the other end of the main winding to serve as the other end of the AC motor. 9. A fan, characterized in that it comprises the AC motor speed regulating circuit in the fan according to any one of claims 1-8. 10. An air conditioner, characterized by comprising the speed regulating circuit of an AC motor in a fan according to any one of claims 1-8.