TWM512852U - AC/DC brushless fan motor - Google Patents

Description

AC and DC brushless fan motor

The present invention relates to an AC-DC brushless fan motor, and more particularly to a DC brushless fan motor that can directly drive a low-voltage DC brushless fan motor by using an active power adjustment mechanism to improve the power consumption of a conventional AC fan motor. It can also directly drive the brushless fan motor with DC power to achieve energy saving effect.

According to the general AC fan motor, the 50/60HZ input motor has poor efficiency and large loss, and the power factor is between 0.4 and 0.6. If the motor speed is to be added or subtracted, it needs to be converted by frequency conversion.

The DC brushless fan motor is mostly connected to an AC/DC power supply. If the AC fan motor is directly input with AC power, the motor coil will be inductive due to the no-power factor correction, resulting in efficiency. Low situation. The general DC brushless fan motor uses fixed-frequency PWM, which is determined by the ON/OFF period. When the motor is driven by the ON/OFF period, the motor efficiency will be deteriorated. If the motor is output with the same power, the PWM100% is 50% higher than the PWM. Energy saving, PWM50% is more energy efficient than PWM20%. Generally, most of the time is at medium and low speed. It is not common to use full speed time. Therefore, it is generally inefficient to drive the motor at a low ON state with a PWM ON/OFF cycle. The patent power modulation control unit adjusts the constant current unit and the front drive unit to adopt a constant power full-cycle output, which is more efficient than a general PWM-driven DC brushless fan motor at a full speed, so that the above problem can be effectively solved. And the active power adjustment mechanism is also Can be used for wide voltage DC input.

Therefore, in order to improve the above-mentioned defects, especially power consumption, low efficiency and the like. Therefore, the creators of this case have devoted themselves to the development of an "AC-DC brushless fan motor" to effectively improve the shortcomings of the application.

The main purpose of this creation is to enable the fan motor to utilize the cooperation of the active power adjustment mechanism, thereby directly driving the low-voltage DC brushless fan motor from the alternating current, improving the power consumption of the conventional AC fan motor, and directly driving the DC motor without Brush the fan motor to achieve energy saving.

For the above purposes, the present invention is an AC-DC brushless fan motor comprising: a brushless motor; and an active power adjustment mechanism disposed in the motor, comprising an EMI electromagnetic interference filter rectifying unit, a driving unit before connecting the EMI electromagnetic interference filter rectifying unit, a motor driving unit connecting the brushless motor and the front driving unit, a constant current unit connecting the EMI electromagnetic interference filtering rectifying unit and the front driving unit, and a pre-connecting driving unit A protection unit of the current unit, a motor control unit connected to the motor drive unit, and a sensing unit connected to the motor control unit.

In one embodiment of the present invention, the brushless fan motor includes a housing, a rotor coupled to the inner edge of the housing, a stator corresponding to the rotor, a bearing disposed in the stator, and a through bearing. a spindle, wherein the active power adjustment mechanism is disposed in the housing, and the motor drive unit is coupled to the stator.

In one embodiment of the present invention, the brushless fan motor includes a housing, a stator coupled to the inner edge of the housing, and a rotor disposed in the stator, respectively disposed in the housing The bearing at both ends and a mandrel through which the rotor and the bearing are disposed, and the active power adjusting mechanism is disposed in the housing, and the motor driving unit is coupled to the stator.

In an embodiment of the present invention, the EMI electromagnetic interference filter rectifying unit is connected to a wire.

In one embodiment of the present invention, the motor control unit is further coupled to a pulse wave generation (FG) or rotation detection (RD) output signal.

In an embodiment of the present invention, the active power adjustment mechanism is further provided with a power modulation control unit connected to the constant current unit.

In an embodiment of the present invention, the active power adjustment mechanism may also be provided with a power modulation control unit connected to the motor control unit as a power-regulating PWM modulation power method).

In an embodiment of the present invention, the input signal of the power modulation control unit is a pulse width modulation (PWM) control signal, a switch, a wireless communication controller, a digital/analog signal controller, a photosensitive element, or a thermal Generated by a resistor.

1‧‧‧Brushless motor

11‧‧‧Shell

12‧‧‧Rotor

13‧‧‧ Stator

14‧‧‧ bearing

15‧‧‧ mandrel

2‧‧‧Active power adjustment mechanism

21, 21a‧‧‧EMI electromagnetic interference filter rectifier unit

211‧‧‧ wire

22, 22a‧‧‧ front drive unit

23, 23a‧‧‧Motor drive unit

24, 24a‧‧‧ constant current unit

25, 25a‧‧‧protection compensation unit

26, 26a‧‧ ‧ motor control unit

27, 27a‧‧‧Sensor unit

28, 28a‧‧‧Power Modulation Control Unit

3, 3a‧‧‧ brushless motor

31‧‧‧Shell

32‧‧‧ Stator

33‧‧‧Rotor

34‧‧‧ bearing

35‧‧‧ mandrel

Fig. 1 is a schematic diagram showing the basic structure of the first embodiment of the present creation.

Figure 2 is a block diagram of the creation.

Figure 3 is a schematic diagram of the circuit of this creation.

Fig. 4 is a schematic diagram showing the basic structure of the second embodiment of the present creation.

Figure 5 is a schematic diagram showing the basic structure of the third embodiment of the present creation.

Please refer to the "1, 2, and 3" diagrams, which are schematic diagrams of the basic architecture of the first embodiment of the creation, a block diagram of the creation, and a circuit diagram of the creation. As shown in the figure: This creation is an AC-DC brushless fan motor comprising a brushless motor 1 and an active power adjustment mechanism 2.

The above-mentioned brushless fan motor 1 can be an externally-rotating motor, which comprises a housing 11, a rotor 12 coupled to the inner edge of the housing 11, a stator 13 correspondingly disposed in the rotor 12, and a stator The bearing 14 of 13 and the mandrel 15 of the bearing 14 are disposed.

The active power adjustment mechanism 2 is disposed in the casing 11 of the brushless fan motor 1, and includes an EMI electromagnetic interference filter rectification unit 21, a driving unit 22 connected to the EMI electromagnetic interference filter rectification unit 21, and a connection stator 13. And a motor driving unit 23 of the front driving unit 22, a constant current unit 24 connecting the EMI electromagnetic interference filtering rectifying unit 21 and the front driving unit 22, a pre-connecting driving unit 22 and a protection power compensation unit 25 of the active power factor 4, a motor control unit 26 connected to the front drive unit 22 and a sensing unit 27 connected to the motor control unit 26, wherein the EMI electromagnetic interference filter rectification unit 21 is connected with a wire 211, and the active power adjustment mechanism 2 is further provided. There is a power modulation control unit 28 connected to the active power factor 4, or a power modulation control unit 28 connected to the motor control unit 26, and the motor control unit 26 is further connected to a pulse generation (FG) or rotation detection. The alarm (RD) outputs a signal, and the input signal of the power modulation and conversion unit 28 is a pulse width modulation (PWM) control signal, a switch, a wireless communication controller, and a digital/ Ratio control signal, the photosensitive member or by thermistors. If so, a new AC-DC brushless fan motor is constructed by the above structure.

When the present invention is used, the AC power source or the DC power source may be input from the wire 211, and after the rectification and EMI filtering by the EMI electromagnetic interference filter rectifying unit 21, the constant current unit 24 and the front driving unit 22 are set according to the frequency and the peak current. Through the combination of the semiconductor switching element, the current limiting resistor and the inductive component, the required power is required to take out the AC power supply (when the direct current is input, it becomes the DC mode constant current). If the AC/sampling 50/60 Hz waveform is used, the constant current unit 24 is increased. A power factor corrects the PFC function, the load is resistive, and the AC is coupled by the front drive unit 22, the motor drive unit 23, the motor control unit 26, and the stator 13 to cause the rotor 12 of the brushless motor 1 to rotate due to magnetic field induction, and utilize The protection compensating unit 25 performs overvoltage protection or feedback compensation, and at the same time, the sensing unit 27 senses the motor phase polarity, and then the motor control unit 26, the motor driving unit 23 and the stator 13 control the rotor 12 of the brushless motor 1 to operate. The magnetic pole NS is commutated, and the motor control unit 26 outputs the commutated wave high/Low level pulse wave generating (FG) signal, or if there is no h in a certain period of time. The igh/Low changes, the output rotation detection alarm (RD) signal, and the power modulation control unit 28, the current of the constant current unit 24 and the front drive unit 22 is modulated, and the front drive unit 22 modulates the motor output power to drive the low voltage. The DC brushless motor 1, or the power modulation control unit 28, modulates the motor control unit 26 to modulate the motor output power. When the motor exceeds the required power or voltage, or the motor is locked, the protection compensation unit 25 turns off or compensates the main current unit 24, and the protection compensation unit 25 can compensate for voltage, current, frequency or power, and the constant current unit 24 can also For the average constant current mode, the constant current unit 24 can also sample the active power AC waveform, so that the power factor is connected to nearly 1, and the overall load approaches the resistance to achieve energy saving.

Please refer to "Figure 4" for the basic architecture of the second embodiment of this creation. Figure. As shown in the figure, the brushless motor 1 of the present invention can be in the structural form of the second embodiment in addition to the configuration of the first embodiment, and the difference is that the brushless motor 1 The fan motor 3 includes a casing 31, a stator 32 coupled to the inner edge of the casing 31, a rotor 33 correspondingly disposed in the stator 32, bearings 34 respectively disposed at opposite ends of the casing 31, and a rotor through which the rotor is disposed. 33 and the spindle 34 of the bearing 34, and the active power adjustment mechanism 2 is disposed in the housing 31, and the motor driving unit 23 is connected to the stator 13; thus, the present invention can also be applied to the internal rotation motor And the effect of the first embodiment can be also achieved, so that the creation can conform to the state of use of different motors.

Please refer to FIG. 5, which is a schematic diagram of the basic architecture of the third embodiment of the present invention. As shown in the figure, the brushless fan motor 1 and the brushless fan motor 3 of the present invention may be in the structural form of the third embodiment in addition to the configuration of the first and second embodiments. The difference is that the active power adjustment mechanism 2a is disposed outside the brushless fan motor 1 and the DC-free 3a, and the active power adjustment mechanism 2a includes a power modulation control unit 28a and EMI electromagnetic interference filter rectification. The unit 21a, the front driving unit 22a, the active power factor a, and the protection compensation unit 25a; and the motor driving unit 23a, the motor control unit 26a and the sensing unit 27a are disposed on a board Pcb and are provided with a fan The power of the motor 1, the brushless motor 3 to the first and second embodiments, so that the creation can conform to the state of use of different motors.

In summary, the AC-DC brushless fan motor can effectively improve various shortcomings of the conventional use, and the brushless fan motor can be driven by the active power adjustment mechanism, thereby directly driving the low-voltage DC brushless fan motor by the alternating current. The power consumption of the traditional AC fan motor can also directly drive the brushless fan motor with DC power to achieve energy saving. In summary, the creation of this creation can be more progressive, more practical, and more in line with the needs of consumers. It has indeed met the requirements for the creation of a patent application, and has filed a patent application according to law.

However, the above is only the preferred embodiment of the present invention, and the scope of the creation of the present invention cannot be limited by this; therefore, the simple equivalent changes and modifications made by the scope of the patent application and the content of the creation specification are All should remain within the scope of this creation patent.

1‧‧‧Brushless motor

11‧‧‧Shell

12‧‧‧Rotor

13‧‧‧ Stator

14‧‧‧ bearing

15‧‧‧ mandrel

2‧‧‧Active power adjustment mechanism

211‧‧‧ wire

27‧‧‧Sensor unit

Claims (8)

An AC-DC brushless fan motor includes: a brushless motor; and an active power adjustment mechanism, which is disposed in the brushless motor, and includes an EMI electromagnetic interference filter rectification unit and a connection EMI electromagnetic interference filter rectification unit The front drive unit, a motor drive unit connecting the brushless motor and the front drive unit, a constant current unit connecting the EMI electromagnetic interference filter rectification unit and the front drive unit, a protection compensation unit connecting the front drive unit and the constant current unit, A motor control unit connected to the motor drive unit and a sensing unit connected to the motor control unit. The AC brushless fan motor according to claim 1, wherein the brushless motor comprises a casing, a rotor coupled to the inner edge of the casing, a stator disposed in the rotor, and a stator. The bearing in the middle, and a mandrel through which the bearing is disposed, and the active power adjusting mechanism is disposed in the housing, and the motor driving unit is coupled to the stator. The AC brushless fan motor according to claim 1, wherein the brushless motor comprises a casing, a stator coupled to the inner edge of the casing, and a rotor correspondingly disposed in the stator, respectively disposed on A bearing at both ends of the housing and a mandrel through which the rotor and the bearing are disposed, and the active power adjustment mechanism is disposed in the housing, and the motor driving unit is coupled to the stator. The AC brushless fan motor according to claim 1, wherein the EMI electromagnetic interference filter rectifying unit is connected with a wire. An AC brushless fan motor according to claim 1 of the patent application scope, wherein the horse The control unit is further connected to a pulse generation (FG) or rotation detection alarm (RD) output signal. The AC brushless fan motor according to claim 1, wherein the active power adjustment mechanism is further provided with a power modulation control unit connected to the constant current unit or a motor control unit. An AC/DC brushless motor includes: a brushless motor; and an active power factor correction power adjustment mechanism, which is disposed outside the brushless motor, and includes an EMI electromagnetic interference filter rectifying unit and a connection EMI electromagnetic interference filter a driving unit before the rectifying unit, a constant current unit connecting the EMI electromagnetic interference filtering rectifying unit and the front driving unit, a connecting front driving unit and an active power factor correction compensation unit, and a connection active power factor correction variable control unit; The interior of the brushless motor includes a motor drive unit that connects the brushless motor and the front drive unit, a motor control unit that connects the front drive unit, and a sensing unit that connects the brushless motor and the motor control unit. According to the AC/DC brushless fan motor described in claim 6 or 7, wherein the input signal of the modulation current control unit is a pulse width modulation (PWM) control signal, a switch, and a wireless communication control. Generated by a digital, analog/analog signal controller, photosensor or thermistor.