JP2006296028A - Brushless dc motor incorporating circuit being connected directly with ac power supply, and ventilation fan mounting it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brushless DC motor incorporating a circuit being connected directly with an AC power supply in which the characteristics can be altered easily while saving the space and reducing the cost without connecting with a special setting means. <P>SOLUTION: Since the output from a voltage converting means 8 can be altered by an output setting means 9 arranged on the enclosure of a brushless DC motor 1 incorporating a circuit being connected directly with a power supply comprising a rectifying means 7, a magnetic pole position detecting means 4, an inverter circuit 6, a drive logic control means 5, and a voltage converting means 8 for obtaining a DC voltage by lowering a rectified and smoothed voltage, no setting means is required other than the DC motor 1 and characteristics of the DC motor 1 can be altered easily. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention mainly relates to a brushless DC for driving a fan such as a pipe fan, a ceiling-embedded ventilator for exhaust and air supply, a fan, a humidifier, a dehumidifier, a refrigeration apparatus, an air conditioner, a water heater, etc. It relates to motors.

  In recent years, there has been a strong demand for low-price, high-efficiency, and low-noise performance in fan-driven motors mounted on electrical equipment such as ventilators, and it is difficult to achieve significant increases in efficiency with induction motors. The number of brushless DC motors using permanent magnets is increasing. On the other hand, there is also a demand for an electric motor that is easy to use, such as simply rotating by connecting to an AC power source.

  Conventionally, the thing of the structure disclosed by patent documents 1-3 is known for this kind of electric motor.

  Hereinafter, the electric motor will be described with reference to FIGS.

  As shown in the figure, the electric motor includes a rectification unit 101, a control unit 102, motor drive coils 103 and 104, a magnet rotor 105, a permanent magnet 105a, a single printed circuit board 106, switching elements 107 and 108, and a smoothing capacitor 109. A rectifying unit 101 that rectifies commercial AC power on a single printed circuit board 106, two-phase drive coils 103 and 104 of a DC motor, a magnet rotor 105 provided with a permanent magnet 105a, and a motor drive coil A smoothing capacitor 109 is disposed between the rectifiers 103 and 104 and the rectifying unit 101. The switching elements 107 and 108 that allow current to flow only in one direction to the motor driving coils 103 and 104, and the switching elements 107 and 108 are used to drive the motor. And a control unit 102 that controls energization of the coils 103 and 104, and the rectification unit 101 performs rectification. The two-phase half-wave drive in which the high-voltage DC power source smoothed by the smoothing capacitor 109 is directly supplied to the motor drive coils 103 and 104, and the high-voltage DC power source after rectification and smoothing is reduced and supplied to the control unit 102. The system is structured.

  Moreover, the thing of the structure disclosed by patent document 4 is known for this kind of electric motor.

  Hereinafter, the electric motor will be described with reference to FIG.

As shown in the figure, a rectifying unit 101 that rectifies an AC power source, a DC-DC converter 110 that lowers the DC voltage obtained by rectifying by the rectifying unit 101, and two-phase drive coils 103 and 104 of a DC motor. A magnet rotor 105 having a permanent magnet 105a, a smoothing capacitor 109 between the DC-DC converter 110 and the rectifying unit 101, and a smoothing capacitor between the DC-DC converter 110 and the motor drive coils 103 and 104. 111 and the motor driving coils 103 and 104 are provided with switching elements 107 and 108 that allow current to flow only in one direction, and the DC-DC converter 110 reduces the DC power supply voltage execution value generated in the rectifier 101 to reduce the magnetic pole. The switching elements 107 and 108 are controlled by a signal from the detection element, and the low voltage DC current is sequentially applied to the motor drive coils 103 and 104. It constitutes a two-phase half-wave drive scheme to be shed.
JP 2000-41370 A JP 2000-41395 A Japanese Patent Laid-Open No. 2002-10609 JP 2003-284307 A

  According to such a conventional electric motor, the configuration is such that the direct-current power supply is directly inputted to complete the driving of the DC motor. There is a problem that the adjustment man-hours required to satisfy the range of use increases, the built-in circuit cannot be shared, and the cost cannot be reduced. Sharing and cost reduction are required.

  Also, in order to obtain the output characteristics of the motor according to the equipment to be installed, a control circuit and setting means different from the motor are provided, and the characteristics of the motor are changed according to the instruction signal output from the control circuit or setting means. However, there is a problem that the circuit space is required separately, the connection line is necessary, and the equipment cannot be reduced in size and cost, and the advantage of being directly connected to the AC power source cannot be exhibited. Therefore, it is required that the characteristics of the electric motor can be easily changed without providing a circuit and setting means separately from the electric motor, and that space saving and cost reduction can be achieved.

  The present invention solves such a conventional problem, and does not require a separate circuit, and does not require adjustment of windings or adjustment of built-in circuit constants. An object of the present invention is to provide a brushless DC motor with a built-in circuit that is directly connected to an AC power source that can share an electric motor and a built-in circuit, save space, and reduce costs.

  In addition, centrifugal ventilation fans such as sirocco fans have a problem that when the motor is operated at a constant voltage or a constant rotation speed, a stable air volume cannot be obtained against static pressure fluctuations such as pressure loss. There is a demand for an electric motor that can be operated with a substantially constant torque, that is, a constant current, that can obtain a stable air volume against fluctuations in static pressure such as loss.

  In addition, in axial-flow type ventilation fans such as propeller fans, when the motor is operated at constant voltage or constant current, there is a problem that a stable air volume cannot be obtained against static pressure fluctuations such as pressure loss. There is a demand for an electric motor that can be operated at a constant rotational speed, which can obtain a stable air volume against static pressure fluctuations.

  The present invention solves such a conventional problem, satisfying the usage range and easily changing the characteristics without changing the windings or adjusting the constants of the built-in circuit. An object of the present invention is to provide a brushless DC motor with a built-in circuit that is directly connected to an AC power source that can be shared and reduced in cost and can obtain a stable air volume against static pressure fluctuations such as pressure loss.

  In addition, when a ventilation blower is installed, it is difficult to change the characteristics of the motor, so it is difficult to change the equipment on site. An electric motor that can be used is required.

  Moreover, the ventilation fan apparatus occupies most cases where the user cannot easily touch it (for example, the ceiling), and the user cannot easily change the ventilation fan capacity of the ventilation fan apparatus. There is a demand for an electric motor whose characteristics can be easily changed after installation.

  The present invention solves such a conventional problem, satisfying the range of use without changing the windings and adjusting the constants of the built-in circuit, and even after installation on site, the contractor and user can It is an object of the present invention to provide a brushless DC motor with a built-in circuit that can be easily changed in characteristics, and that is directly connected to an AC power source that can share the electric motor and the built-in circuit and reduce the cost.

  In addition, if the characteristics of the motor and the ventilation and ventilation capacity are changed after the ventilation fan is installed, the majority of cases are installed in places where it is difficult to determine that the change has been accepted. Therefore, there is a demand for an electric motor that can determine that it has been accepted.

  The present invention solves such a conventional problem, satisfying the range of use without changing the windings and adjusting the constants of the built-in circuit, and even after installation on site, the contractor and user can An object is to provide a brushless DC motor with a built-in circuit that can be easily changed in characteristics, can be determined that the change has been accepted, and is directly connected to an AC power source that can share the electric motor and the built-in circuit and reduce the cost. It is said.

  In order to achieve the above object, a brushless DC motor with a built-in circuit directly connected to an AC power source according to the present invention has a stator in which a drive coil is wound around a stator core via an insulator, and the stator is opposed to the stator. A magnet rotor provided with a permanent magnet rotatably arranged, a magnetic pole position detecting means for detecting a magnetic pole position of the magnet rotor, an inverter circuit bridge-connected by a plurality of switching elements, and the AC power supply are rectified Based on the signal of the magnetic pole position detection means, the voltage conversion means for reducing the high voltage obtained by the rectification means and applying it to the inverter circuit, and the voltage generated by the voltage conversion means via the inverter circuit Drive logic control means for sequentially energizing the drive coil in a predetermined direction and order, and output setting means for determining an output voltage of the voltage conversion means, The setting means is obtained by a circuit-integrated brushless DC motor is directly connected to an AC power source, characterized in that arranged in the outer portion of the brushless DC motor.

  This makes it possible to easily change the characteristics of the motor without providing a circuit or setting means separately from the motor, and to connect the motor and the built-in circuit, thereby directly connecting to an AC power source that can save space and cost. A built-in brushless DC motor can be obtained.

  In addition, the magnetic pole detection means, the inverter circuit, the rectification means, the voltage conversion means, the drive logic control means, and the output setting means are configured on the same printed circuit board, and the stator and the printed circuit board also serve as insulation. This is a brushless DC motor with a built-in circuit that is directly connected to an AC power supply, characterized in that it is integrated with a mold resin and the output setting means is arranged in the outer portion of the mold resin of the brushless DC motor.

  As a result, the characteristics of the motor can be easily changed without providing a circuit and setting means separately from the motor, and the motor and the built-in circuit can be shared, space saving, cost reduction, insulation and A brushless DC motor with a built-in circuit that is directly connected to an AC power supply with enhanced heat dissipation effect can be obtained.

  Another means is an AC power supply characterized in that the output setting means includes a voltage instruction means, and the voltage conversion means includes a voltage variable means for changing the voltage according to a signal output from the voltage instruction means. This is a brushless DC motor with a built-in circuit that is directly connected.

  This makes it possible to change the characteristics easily without changing the windings or adjusting the constants of the built-in circuit, making it easy to change the characteristics, and sharing the motor and built-in circuit, saving space and reducing costs. A brushless DC motor with a built-in circuit directly connected can be obtained.

  The other means includes current setting means in the output setting means, and the voltage conversion means includes voltage variable means for changing the voltage to an average current value corresponding to the signal output from the current indicating means, and the drive coil. It is a brushless DC motor with a built-in circuit that is directly connected to an AC power source, characterized in that it includes a current detection means for converting the voltage signal into a voltage signal corresponding to the flowing current.

  This makes it possible to satisfy the operating range and easily change the characteristics without changing the windings or adjusting the constants of the built-in circuit. The motor and built-in circuit can be used in common, saving space and reducing costs. When used for a centrifugal fan such as the above, a brushless DC motor with a built-in circuit directly connected to an AC power supply capable of obtaining a stable air volume against static pressure fluctuations such as pressure loss can be obtained.

  The other means is provided with a rotation speed instruction means in the output setting means, and the drive logic control means has a rotation speed conversion means for converting into a voltage corresponding to the rotation speed of the DC motor based on the signal of the magnetic pole position detection means. The voltage conversion means includes a voltage variable means for changing the voltage to a rotation speed corresponding to a signal output from the rotation speed instruction means. A brushless DC motor with a built-in circuit directly connected to an AC power supply It is what.

  This makes it possible to satisfy the operating range and easily change the characteristics without changing the windings or adjusting the constants of the built-in circuit. The motor and built-in circuit can be shared, saving space, and reducing costs. When used for an axial flow type fan such as the above, a brushless DC motor with a built-in circuit directly connected to an AC power supply capable of obtaining a stable air volume against static pressure fluctuations such as pressure loss can be obtained.

  Another means is a brushless circuit-embedded type directly connected to an AC power source, characterized in that the voltage indicating means is replaced with an infrared light receiving section, and pulse signal converting means for converting a pulse signal output from the infrared light receiving section is provided. It is a DC motor.

  This makes it possible to satisfy the operating range without changing the windings or adjusting the constants of the built-in circuit, allowing the contractor and user to easily change the characteristics even after installation at the site, and sharing the motor and the built-in circuit. Thus, a brushless DC motor with a built-in circuit directly connected to an AC power source that can save space and cost can be obtained.

  Another means is a brushless with a built-in circuit directly connected to an AC power supply, characterized in that the current indicating means is replaced with an infrared light receiving section, and pulse signal conversion means for converting a pulse signal output from the infrared light receiving section is provided. It is a DC motor.

  This makes it possible to satisfy the operating range without changing the windings or adjusting the constants of the built-in circuit, allowing the contractor and user to easily change the characteristics even after installation at the site, and sharing the motor and the built-in circuit. A space-saving, low-cost, brushless built-in circuit that is directly connected to an AC power supply that can obtain a stable air volume against static pressure fluctuations such as pressure loss when used in centrifugal fans such as sirocco fans. A DC motor is obtained.

  Another means is a circuit-embedded type directly connected to an AC power source characterized in that the rotation speed instruction means is replaced with an infrared light receiving section, and pulse signal conversion means for converting a pulse signal output from the infrared light receiving section is provided. This is a brushless DC motor.

  This makes it possible to satisfy the operating range without changing the windings or adjusting the constants of the built-in circuit, allowing the contractor and user to easily change the characteristics even after installation at the site, and sharing the motor and the built-in circuit. With a built-in circuit that is directly connected to an AC power supply that can obtain a stable air volume against static pressure fluctuations such as pressure loss when used in an axial fan such as a propeller fan. A brushless DC motor is obtained.

  Another means includes a brushless DC motor with a built-in circuit directly connected to an AC power supply, characterized in that the output setting means includes an infrared light receiving portion and a display means for displaying that the infrared light receiving portion has received a signal. It is what.

  This makes it possible to satisfy the operating range without changing the windings or adjusting the constants of the built-in circuit, allowing the construction contractor and user to easily change the characteristics even after installation at the site, and accepting changes when they are changed. Thus, a brushless DC motor with a built-in circuit that can be directly connected to an AC power source that can share the electric motor and the built-in circuit, reduce costs, and can obtain a stable air flow against static pressure fluctuations can be obtained.

  Another means is a ventilation blower equipped with a brushless DC motor with a built-in circuit that is directly connected to an AC power supply.

  This makes it possible to easily change characteristics without changing the windings or adjusting the constants of the built-in circuit, making it easy to change the characteristics, sharing the motor and built-in circuit, reducing costs, and static pressure such as pressure loss. A ventilation blower equipped with a brushless DC motor with a built-in circuit directly connected to an AC power supply capable of obtaining a stable air volume against fluctuations is obtained.

  According to the present invention, it is possible to easily change the characteristics of the electric motor without providing a circuit and setting means separately from the electric motor, and to share the electric motor and the built-in circuit, thereby reducing the space and cost. A brushless DC motor with a built-in circuit directly connected can be provided.

  In addition, the characteristics of the motor can be easily changed without providing a circuit or setting means separately from the motor, and the motor and the built-in circuit can be shared, space saving and cost can be reduced. It is possible to provide a brushless DC motor with a built-in circuit that is directly connected to an improved AC power source.

  Directly connected to an AC power source that satisfies the operating range and can easily change characteristics without changing windings or adjusting the constants of the built-in circuit, and can share the motor and built-in circuit, saving space and reducing costs. A brushless DC motor with a built-in circuit can be provided.

  In addition, without changing the windings or adjusting the constants of the built-in circuit, the range of use can be satisfied and the characteristics can be easily changed, and the motor and built-in circuit can be shared and the cost can be reduced. Centrifugal fans such as sirocco fans When used in the above, it is possible to provide a brushless DC motor with a built-in circuit that is directly connected to an AC power supply capable of obtaining a stable air volume against static pressure fluctuations such as pressure loss.

  In addition, without changing the windings or adjusting the constants of the built-in circuit, the range of use can be satisfied and the characteristics can be easily changed, and the motor and built-in circuit can be shared and the cost can be reduced. When used in a fan, it is possible to provide a brushless DC motor with a built-in circuit that is directly connected to an AC power supply capable of obtaining a stable air volume against static pressure fluctuations such as pressure loss.

  Also, without changing the windings or adjusting the constants of the built-in circuit, the range of use is satisfied, and even after installation at the site, the contractor and user can easily change the characteristics, and the motor and built-in circuit are shared. A brushless DC motor with a built-in circuit that is directly connected to an AC power supply that can be reduced in cost can be provided.

  Also, without changing the windings or adjusting the constants of the built-in circuit, the range of use is satisfied, and even after installation at the site, the contractor and user can easily change the characteristics, and the motor and built-in circuit are shared. Built-in circuit type brushless DC that is directly connected to an AC power supply that can obtain a stable air volume against static pressure fluctuations such as pressure loss when used for centrifugal fans such as sirocco fans, which can save space and cost. A motor can be provided.

  Also, without changing the windings or adjusting the constants of the built-in circuit, the range of use is satisfied, and even after installation at the site, the contractor and user can easily change the characteristics, and the motor and built-in circuit are shared. A space-saving, low-cost, brushless type with a built-in circuit that is directly connected to an AC power supply that can obtain a stable airflow against static pressure fluctuations such as pressure loss when used for an axial fan such as a propeller fan. A DC motor can be provided.

  In addition, without changing the windings or adjusting the constants of the built-in circuit, the range of use is satisfied, and even after installation at the site, the contractor and the user can easily change the characteristics. Therefore, it is possible to provide a brushless DC motor with a built-in circuit that can be directly connected to an AC power source that can share a motor and a built-in circuit, reduce costs, and can obtain a stable air volume against static pressure fluctuations.

  In addition, without changing the windings or adjusting the constants of the built-in circuit, the range of use can be satisfied and the characteristics can be easily changed, and the motor and built-in circuit can be shared and the cost can be reduced. In contrast, it is possible to provide a ventilation blower equipped with a brushless DC motor with a built-in circuit that is directly connected to an AC power supply capable of obtaining a stable air volume.

  The invention described in claim 1 of the present invention is a brushless DC motor with a built-in circuit that is directly connected to an AC power source, a stator having a stator core wound with a drive coil via an insulator, and the stator. A magnet rotor having permanent magnets arranged to face and rotate freely, a magnetic pole position detecting means for detecting a magnetic pole position of the magnet rotor, an inverter circuit bridge-connected by a plurality of switching elements, and the AC power source Based on the signal of the magnetic pole position detection means, the voltage conversion means for reducing the high voltage obtained by the rectification means for rectifying the voltage and applying the voltage to the inverter circuit, the voltage generated by the voltage conversion means Drive logic control means for sequentially energizing the drive coil in a predetermined direction and order through the drive coil, and output setting means for determining the output voltage of the voltage conversion means, The output setting means is a brushless DC motor with a built-in circuit that is directly connected to an AC power supply characterized in that the output setting means is arranged in an outer portion of the brushless DC motor, and a circuit and setting means are provided separately from the motor. The characteristics of the electric motor can be easily changed without connection, the electric motor and the built-in circuit can be shared, and the space can be saved and the cost can be reduced.

  Further, the magnetic pole detection means, the inverter circuit, the rectification means, the voltage conversion means, the drive logic control means, and the output setting means are configured on the same printed board, and the stator and the printed board are insulated. 2. A brushless DC motor with a built-in circuit directly connected to an AC power source according to claim 1, wherein the output setting means is integrated with a mold resin outer portion of the brushless DC motor. The characteristics of the motor can be easily changed without providing a circuit or setting means separately from the motor, and the motor and built-in circuit can be shared, space saving and cost reduction can be achieved. Has the effect of enhancing the properties and heat dissipation effect.

  The output setting means includes voltage instruction means, and the voltage conversion means includes voltage variable means for changing the voltage to a voltage corresponding to a signal output from the voltage instruction means. Or, it is a brushless DC motor with a built-in circuit that is directly connected to the AC power supply described in 2. It can satisfy the usage range and easily change the characteristics without changing the winding or adjusting the constant of the built-in circuit. The electric motor and the built-in circuit can be shared, space saving, and cost reduction can be achieved.

  The output setting means includes current instruction means, and the voltage conversion means includes voltage variable means for changing the voltage to an average current value corresponding to a signal output from the current instruction means, and the drive coil. 3. A brushless DC motor with a built-in circuit directly connected to an AC power source according to claim 1, further comprising current detecting means for converting the voltage signal into a voltage signal corresponding to a current flowing through the AC power source. Without changing or adjusting the constants of the built-in circuit, the range of use can be satisfied and the characteristics can be easily changed, and the motor and built-in circuit can be shared and the cost can be reduced.When used for centrifugal fans such as sirocco fans, It has the effect that a stable air volume can be obtained against static pressure fluctuations such as pressure loss.

  The output setting means includes rotation speed instruction means, and the drive logic control means includes rotation speed conversion means for converting into a voltage corresponding to the rotation speed of the DC motor based on a signal from the magnetic pole position detection means. 3. The AC power supply according to claim 1, wherein the voltage conversion unit includes a voltage varying unit configured to vary the voltage to a rotation speed according to a signal output from the rotation speed instruction unit. This is a brushless DC motor with a built-in circuit that is directly connected, and it can be easily changed in characteristics without changing the windings or adjusting the constants of the built-in circuit. The cost can be reduced, and when used in an axial flow fan such as a propeller fan, it has an effect that a stable air volume can be obtained against static pressure fluctuations such as pressure loss.

  Also, a brushless DC motor with a built-in circuit directly connected to an AC power supply, wherein the voltage indicating means is replaced with an infrared light receiving section, and pulse signal conversion means for converting a pulse signal output from the infrared light receiving section is provided. Without changing the windings or adjusting the constants of the built-in circuit, the range of use is satisfied, and the characteristics of the motor and built-in circuit can be changed easily by the contractor and user even after installation at the site. Can be shared and the cost can be reduced.

  Also, a brushless DC motor with a built-in circuit directly connected to an AC power supply, characterized in that the current instruction means is replaced with an infrared light receiving section, and pulse signal conversion means for converting a pulse signal output from the infrared light receiving section is provided. Without changing the windings or adjusting the constants of the built-in circuit, the range of use is satisfied, and the characteristics of the motor and built-in circuit can be changed easily by the contractor and user even after installation at the site. Can be shared, space-saving, and cost-effective. When used in a centrifugal fan such as a sirocco fan, it has the effect of obtaining a stable air volume against static pressure fluctuations such as pressure loss.

  Also, a brushless DC with a built-in circuit directly connected to an AC power supply, characterized in that the rotation speed instruction means is replaced with an infrared light receiving section, and pulse signal conversion means for converting a pulse signal output from the infrared light receiving section is provided. It is a motor that satisfies the operating range without changing the windings or adjusting the built-in circuit constants, and can be easily changed by the contractor and user even after installation at the site. The circuit can be shared, space-saving, and cost can be reduced, and when used for an axial flow fan such as a propeller fan, it has an effect that a stable air volume can be obtained against static pressure fluctuations such as pressure loss.

  9. The direct connection to an AC power source according to claim 6, 7 or 8, wherein said output setting means includes an infrared light receiving section and a display means for displaying that said infrared light receiving section has received a signal. This is a brushless DC motor with a built-in circuit that satisfies the operating range without changing the windings or adjusting the constants of the built-in circuit. It can be changed, it can be determined that the change has been accepted, the electric motor and the built-in circuit can be shared, the cost can be reduced, and a stable air volume can be obtained against static pressure fluctuations.

  Moreover, it is set as the ventilation air blower which mounts the brushless DC motor with a built-in circuit directly connected to the alternating current power supply in any one of Claims 1-9, and adjusts the constant of a coil change or a built-in circuit It is possible to satisfy the usage range, easily change the characteristics, share the motor and built-in circuit, reduce the cost, and obtain a stable air flow against static pressure fluctuations such as pressure loss. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 to 4, a brushless DC motor 1 with a built-in circuit directly connected to an AC power supply includes a drive coil 2, a magnet rotor 3, a magnetic pole position detection unit 4, a drive logic control unit 5, an inverter circuit 6, Rectification means 7, voltage conversion means 8, output setting means 9, stator 10, stator core 10a, insulator 11, bracket 12, bearing 13, thermosetting resin 14, AC power connection terminal 15, printed circuit board 17, chopper circuit 17, a triangular wave generation circuit 18, a voltage variable means 19, and a voltage instruction means 20. A stator 10 in which a drive coil 2 is wound around an insulator 11 formed of an insulating material on a stator core 10a having a plurality of slots. The stator 10 is molded with a thermosetting resin 14 that also serves as insulation. Molded to form an outer shell. The bracket 12 holds the bearing 13. The magnet rotor 3 is a rotor because a plurality of N and S poles are arranged as a pair. The magnetic pole position detection means 4 is, for example, a Hall IC that converts changes in the magnetic rotor 3 from the N pole to the S pole and from the S pole to the N pole into H and L electrical signals. Q1 to Q6 are a plurality of switching elements, for example, transistors, which are bridge-connected to form an inverter circuit 6 and are connected to the drive coil 2 of the stator 10. The drive logic control means 5 turns ON / OFF the switching elements Q1 to Q6 so that the drive coil 2 is sequentially full-wave energized in a predetermined direction and order according to the combination of signals output from the magnetic pole position detection means 4. For example, a general-purpose IC to be controlled. The rectifying means 7 is a diode bridge and a smoothing capacitor for full-wave rectifying the input AC power supply. The voltage conversion means 8 includes a chopper circuit 17 that generates a DC voltage by reducing a high voltage that has been smoothed after full wave rectification, and a triangular wave generation circuit 18 that generates a triangular wave having a predetermined period. The voltage variable means 19 provided in the voltage conversion means 8 is, for example, a comparator that compares the magnitude with the signal output from the triangular wave generation circuit 18. The output setting means 9 is arranged outside the DC motor 1 and is a two-stage changeover switch as the voltage instruction means 20, and the constant voltages V1 and V2 which are predetermined so that the voltage conversion means 8 outputs a desired voltage. And a voltage switch 19. The magnetic pole position detection means 4, the drive logic control means 5, the inverter circuit 6, the rectification means 7, the voltage conversion means 8, the output setting means 9, and the AC power supply connection terminal 15 are configured, electrically wired and connected on the same printed circuit board 16. Then, it is fixed to the stator 10 and is molded by a thermosetting resin 14 that also serves as an insulation to form an outer shell.

  In the above configuration, when a changeover switch arranged on the outer periphery of the DC motor 1 is operated, a predetermined constant voltage V1 or V2 is input to the voltage variable means 19. The voltage varying means 19 compares the constant voltage V1 or V2 with the triangular wave output from the triangular wave generating circuit 18 to generate a PWM waveform having an on time (or off time) corresponding to the constant voltage and outputs the PWM waveform to the chopper circuit 17. The chopper circuit 17 chops the high voltage output from the rectifying means 7 with a PWM waveform to reduce the pressure, and outputs a desired DC voltage corresponding to the constant voltage V1 or V2, thereby changing the characteristics of the DC motor 1.

  The ventilation fan 21 configured as described above is equipped with the DC motor 1 and a fan, for example, the sirocco fan 22, and can easily change the characteristics without connecting a circuit or setting means other than the DC motor 1. The DC motor 1 and the built-in circuit can be shared, space saving, and cost reduction can be achieved.

  Further, since the thermosetting resin 14 also serving as an insulation is in close contact with the electronic components and the stator 10 formed on the printed circuit board 16, the heat radiation effect can be enhanced, and the chopper circuit 17 of the voltage conversion means 8 is provided. Since the temperature rise of the heat generating parts such as switching elements Q1 to Q6 constituting the switching elements (eg, FETs), coils, diodes, and inverter circuits 6 constituting the inverter circuit 6 is suppressed, the parts can be reduced in size and cost.

  In the first embodiment, the changeover switch as the voltage instruction means 20 arranged on the outer periphery of the DC motor 1 is two stages, but may be a multistage switch, for example, a multibit dip switch or a rotary switch. Furthermore, if it is desired to switch continuously, a variable resistor (volume resistor) may be used, and there is no difference in its operation and effect.

(Embodiment 2)
In FIG. 5, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the current instruction means 23 is a two-stage changeover switch, and the constant voltage V3, V4 and the voltage variable means 19 are determined in advance so that the output conversion means 8 has a desired average current value. It is a connection switch. The current detection means 24 is provided in the voltage conversion means 8 and is a filter composed of, for example, a resistor and a capacitor that outputs a substantially constant voltage corresponding to the average value of the current flowing through the drive coil 2 via the inverter circuit 6. .

  In the above configuration, when a changeover switch arranged on the outer periphery of the DC motor 1 is operated, a predetermined constant voltage V3 or V4 is input to the voltage variable means 19. The current flowing through the drive coil 2 via the inverter circuit 6 is input to the current detection means 24 and outputs a substantially constant voltage corresponding to the average current value. The voltage varying means 19 compares the constant voltage V3 or V4 with the substantially constant voltage output from the current detecting means 24, and increases or decreases the comparison signal with the triangular wave output from the triangular wave generating circuit 18. Then, a PWM waveform having an ON time (or OFF time) corresponding to the comparison signal is generated and output to the chopper circuit 17. The chopper circuit 17 chops the high voltage output from the rectifying means 7 with a PWM waveform to reduce the voltage, and outputs a direct current voltage having a desired average current value corresponding to the constant voltage V3 or V4. To change.

  The ventilating fan 21 configured as described above can easily change the characteristics without connecting a circuit or setting means other than the DC motor 1 and can share the DC motor 1 and the built-in circuit, thereby saving space and reducing costs. Can be Further, a ventilation fan equipped with a centrifugal fan such as the sirocco fan 22 can obtain a stable air volume against static pressure fluctuations.

  In the second embodiment, the changeover switch as the current instruction means 23 arranged on the outer periphery of the DC motor 1 has two stages, but may be a multistage switch, for example, a multibit dip switch or a rotary switch. Furthermore, if it is desired to switch continuously, a variable resistor (volume resistor) may be used, and there is no difference in its operation and effect.

(Embodiment 3)
In FIG. 6, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 6, the rotation speed instruction means 25 is a two-stage changeover switch, and connects the constant voltages V5 and V6 predetermined so that the DC motor 1 has a desired rotation speed and the voltage variable means 19. Switch. The rotation speed conversion means 26 provided in the drive logic control means 5 is, for example, a general-purpose IC that outputs a voltage corresponding to the rotation speed based on a signal from the magnetic pole position detection means 4.

  In the above configuration, when a changeover switch arranged on the outer periphery of the DC motor 1 is operated, a predetermined constant voltage V5 or V6 is input to the voltage variable means 19. The rotation speed conversion means 26 outputs a voltage corresponding to the rotation speed of the DC motor 1 based on the signal output from the magnetic pole position detection means 4. The voltage varying means 19 compares the constant voltage V5 or V6 with the voltage output from the rotation speed converting means 26, and increases or decreases the comparison signal with the triangular wave output from the triangular wave generating circuit 18. Then, a PWM waveform having an ON time (or OFF time) corresponding to the comparison signal is generated and output to the chopper circuit 17. The chopper circuit 17 chops the high voltage output from the rectifying means 7 with a PWM waveform to reduce the pressure, and outputs a DC voltage having a desired rotation speed according to the constant voltage V5 or V6, thereby improving the characteristics of the DC motor 1. Change.

  The ventilating fan 21 configured as described above can easily change the characteristics without connecting a circuit or setting means other than the DC motor 1 and can share the DC motor 1 and the built-in circuit, thereby saving space and reducing costs. Can be In addition, a ventilation fan equipped with an axial flow fan (not shown) such as a propeller fan can obtain a stable air volume against static pressure fluctuations.

  In the third embodiment, the changeover switch serving as the rotation speed instruction means 25 arranged on the outer periphery of the DC motor 1 has two stages. However, a multistage switch such as a multibit dip switch or a rotary switch may be used. In addition, if the stepless switching is used, a variable resistor (volume resistor) may be used, and there is no difference in the operation effect.

(Embodiment 4)
In FIG. 7, the same parts as those in the first to third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 7, the pulse signal conversion unit 27 converts the pulse signal output from the infrared light receiving unit 28 into a voltage and outputs the voltage to the voltage conversion unit 8. The infrared light receiving unit 28 converts an infrared signal into a pulse signal and outputs the pulse signal. The pulse signal conversion means 27 and the drive logic control means 5 are built in the microcomputer 29. The display means 30 is, for example, an LED that displays that an infrared signal has been received.

  In the above configuration, when the infrared light receiving unit 28 (not shown) arranged on the outer side of the DC motor 1, for example, on the louver 31 side receives the signal, the infrared signal is converted into a pulse voltage and applied to the pulse signal conversion means 27 of the microcomputer 29. Entered. The pulse signal conversion means 27 outputs a voltage corresponding to the infrared signal to the voltage conversion means 8 and lights or blinks the LED as the display means 30 in order to indicate that it has been received.

  The ventilating fan 21 configured as described above can be easily changed in characteristics by a contractor or user even after installation without connecting a circuit or setting means other than the DC motor 1 and the DC motor 1 and the built-in circuit. Sharing, space saving, and cost reduction can be achieved. It is also possible to confirm that the setting change has been performed reliably. Furthermore, a stable air volume can be obtained against static pressure fluctuations.

  The brushless DC motor with a built-in circuit that is directly connected to the AC power supply according to the present invention can be easily changed in characteristics at the time of shipment from the factory, at the time of construction, or after the construction, and can obtain a stable air volume against static pressure fluctuations. It is widely useful for electrical equipment equipped with a type blower and an axial flow type blower.

1 is a block diagram of a brushless DC motor with a built-in circuit that is directly connected to an AC power supply according to Embodiment 1 of the present invention. Cross section of the brushless DC motor Block diagram of voltage indicating means of the brushless DC motor Three-sided view showing a ventilator equipped with the brushless DC motor Block diagram of current indicating means for a brushless DC motor with a built-in circuit that is directly connected to an AC power supply in Embodiment 2 of the present invention The block diagram of the rotation speed instruction | indication means of the brushless DC motor with a built-in circuit directly connected to AC power supply in Embodiment 3 of this invention Block diagram of a brushless DC motor with a built-in circuit that is directly connected to an AC power supply in Embodiment 4 of the present invention Circuit diagram showing a conventional DC motor Sectional view showing the DC motor Perspective view showing the DC motor Circuit diagram showing another conventional DC motor

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Brushless DC motor with a built-in circuit directly connected to AC power supply 2 Drive coil 3 Magnet rotor 3a Magnet 4 Magnetic pole position detection means 5 Drive logic control means 6 Inverter circuit 7 Rectification means 8 Voltage conversion means 9 Output setting means 10 Stator 10a Stator core 11 Insulator 12 Bracket 13 Bearing 14 Thermosetting resin 15 AC power connection terminal 16 Printed circuit board 17 Chopper circuit 18 Triangle wave generating circuit 19 Voltage variable means 20 Voltage instruction means 21 Ventilation fan 22 Sirocco fan 23 Current instruction means 24 Current detection means 25 rotational speed instruction means 26 rotational speed conversion means 27 pulse signal conversion means 28 infrared receiving unit 29 microcomputer 30 display means 31 louver Q1 switching element Q2 switching element Q3 switching element Q4 switch Switching element Q5 switching element Q6 switching element V1 constant voltage V2 constant voltage V3 constant voltage V4 constant voltage V5 constant voltage V6 constant voltage

Claims (10)

A brushless DC motor with a built-in circuit that is directly connected to an AC power source, and includes a stator in which a drive coil is wound around a stator core via an insulator, and a permanent magnet that is rotatably disposed opposite to the stator. The magnet rotor provided, the magnetic pole position detecting means for detecting the magnetic pole position of the magnet rotor, the inverter circuit bridge-connected by a plurality of switching elements, and the high voltage obtained by the rectifying means for rectifying the AC power supply Based on the signal from the voltage conversion means that depressurizes and applies to the inverter circuit, and the signal from the magnetic pole position detection means, the voltage generated by the voltage conversion means is applied to the drive coil via the inverter circuit in a predetermined direction. Drive logic control means for conducting full-wave energization sequentially in sequence, and output setting means for determining an output voltage of the voltage conversion means, wherein the output setting means comprises the brush Circuit-integrated brushless DC motor is directly connected to an AC power source, characterized in that arranged in the outer portion of the scan DC motor. The magnetic pole detection means, the inverter circuit, the rectification means, the voltage conversion means, the drive logic control means, and the output setting means are configured on the same printed circuit board, and the stator and the printed circuit board also serve as insulation. 2. The brushless DC motor with a built-in circuit directly connected to an AC power source according to claim 1, wherein the output setting means is integrated with a mold resin outer portion of the brushless DC motor. 3. The output setting unit includes a voltage instruction unit, and the voltage conversion unit includes a voltage variable unit that varies the voltage according to a signal output from the voltage instruction unit. A brushless DC motor with a built-in circuit that is directly connected to the described AC power source. The output setting means includes current instruction means, and the voltage conversion means includes voltage variable means for changing the voltage to an average current value corresponding to a signal output from the current instruction means and flows to the drive coil. 3. A brushless DC motor with a built-in circuit directly connected to an AC power source according to claim 1, further comprising current detecting means for converting the voltage signal into a voltage signal corresponding to the current. The output setting means includes a rotation speed instruction means, and the drive logic control means includes a rotation speed conversion means for converting into a voltage corresponding to the rotation speed of the DC motor based on a signal from the magnetic pole position detection means, 3. The AC power supply according to claim 1, wherein the voltage converting means includes voltage changing means for changing to a voltage having a rotation speed corresponding to a signal output from the rotation speed instruction means. Built-in brushless DC motor. 4. A circuit built-in type directly connected to an AC power source according to claim 3, wherein said voltage indicating means is replaced with an infrared light receiving section, and pulse signal converting means for converting a pulse signal output from said infrared light receiving section is provided. Brushless DC motor. 5. The circuit built-in type directly connected to an AC power source according to claim 4, wherein said current indicating means is replaced with an infrared light receiving section, and pulse signal conversion means for converting a pulse signal output from said infrared light receiving section is provided. Brushless DC motor. 6. The circuit built-in type directly connected to an AC power source according to claim 5, further comprising pulse signal conversion means for replacing the rotation speed instruction means with an infrared light receiving section and converting a pulse signal output from the infrared light receiving section. Brushless DC motor. 9. The circuit directly connected to an AC power source according to claim 6, 7 or 8, wherein said output setting means includes an infrared light receiving section and a display means for displaying that the infrared light receiving section has received a signal. Built-in brushless DC motor. A ventilation blower equipped with a brushless DC motor with a built-in circuit that is directly connected to the AC power supply according to claim 1.

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