JP5296817B2 - Drive circuit built-in motor, blower and equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor with a built-in drive circuit, which is compatible with even for a motor of high voltage and high power. <P>SOLUTION: The motor uses a general-purpose high voltage switch main element constituted by a plurality of IC chips as six switch elements. The motor has a molded module IC mounting in the same package a circuit including the general-purpose high voltage switch main elements, and diodes which are connected in reverse-parallel to the elements, respectively, a circuit board which mounts the module IC on the surface opposite to a soldering surface on which surface mounted devices are mounted, and is constituted by a printed circuit board, and soldered by flow soldering, a resin-molded stator mold with the circuit board and a motor stator connected, and an IC which is provided on the soldering surface on which the surface mounted devices of the circuit board are mounted, and integrates a control circuit constituted by only chips of a breakdown voltage of less than 60 V that generates the drive signal of the module IC. Three elements in an upper stage among the six switch elements perform current driving using high voltage transistors with high breakdown voltage. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention comprises a stator portion having a stator core wound with a winding, a molded stator obtained by molding a drive circuit board, and a rotor, and a drive circuit built-in motor driven by a high-voltage power supply of 100 V or more, and a blower using the motor. It relates to equipment. In particular, as a motor with a built-in drive circuit, a high-voltage DC brushless motor used for a blower of a cold air conditioner will be described as an example.

  A conventional brushless motor uses a direct current output of a rectifying / smoothing circuit including a bridge diode and a smoothing capacitor connected to an alternating current power supply as a drive power supply. The brushless motor includes a stator winding that is three-phase connected, a permanent magnet rotor, and a rotational position sensor. The drive circuit of the brushless motor includes six switching power elements and a switching power element unit composed of six diodes connected in reverse parallel to each other, a drive signal generating means, a commutation signal generating means, and a speed error signal generating And a PWM signal control means, and the drive circuit is made into a one-chip IC as a driver IC.

  With the above configuration, the output signal of the rotational position sensor is subjected to logic processing by the commutation signal generation means, the output signal is transmitted to the drive signal generation means, the commutation signal is output to the switching power element section, and the speed error signal is generated. The speed command signal received from the outside by the means and the rotation signal obtained by combining the output signal of the rotor position sensor are compared to obtain a speed error signal, and the PWM control means is switched to reduce the speed error signal The speed of the brushless motor is controlled by controlling the PWM duty of the power element. In addition, the rotation speed signal is obtained by synthesizing the output signal of the rotor position sensor, but there is also one that obtains the rotation speed signal from a frequency generator provided separately from the rotor position sensor.

  Further, in a conventional brushless motor, a stator winding is applied to a stator core via an iron core insulating layer. On the other hand, the printed circuit board has a winding hook groove and winding end winding projection on its outer periphery, but is molded into a substantially donut disk shape. On the other hand, a driver IC formed as a single drive circuit is formed in the longitudinal direction of the printed circuit board. Are arranged in a radial pattern so that the longitudinal directions thereof coincide with each other and are located in a space between adjacent coil ends of the stator winding. Further, the driver IC has a structure with a built-in radiating fin or a radiating tab.

  The rotor position sensors are mounted on the printed circuit board at an electrical angle of 120 °. The fixed resistor, jumper wire, and capacitor are also mounted at positions where they do not contact or interfere with the winding or shroud when the printed circuit board is mounted on the wound stator core. The printed board is provided with a hole for holding the printed board in a fixed position in the mold during resin molding and for inserting bolts or rivets when the motor is assembled after molding. Furthermore, a lead wire group for supplying power or transmitting a speed command signal is also attached to the printed circuit board, and a lead bush for protecting the lead wire group from heat and pressure during resin molding is fixed to the lead wire group. At this time, an iron core insulating layer and a positioning groove are also provided (see, for example, Patent Document 1).

  Further, in the conventional motor, a winding is provided on the iron core, and circuit elements and test pins are provided on the printed circuit board. The iron core and the printed circuit board are integrally formed of a molding material to form a stator. The rotor is composed of a magnet and a shaft. The bearing is provided on the stator for the purpose of holding the rotor.

  The above components, stator, rotor, and bearing constitute a motor. In the motor configured as described above, the winding is energized and controlled by the printed board integrally formed with the molding material. As a result, an electromagnetic force is generated between the iron core and the rotor, and the rotor is rotationally controlled. The test pin is provided at a minimum distance of 3 mm from the surface of the stator and is electrically connected to the circuit element of the printed circuit board. Even if the printed circuit board is integrally formed with the molded material, the molded material is only a few millimeters away. By cutting to a certain extent and exposing a part of the test pin, there is an effect that a specific electric signal of the printed circuit board can be measured (for example, see Patent Document 2).

  A process of creating a conventional motor circuit board will be described. First, the surface mount component is fixed with an adhesive or the like, cream solder is applied to the land on the pattern and the electrode portion of the component, and the applied surface is heated (reflow oven) to solder the surface mount component. Further, the surface mounting component is fixed to the surface opposite to the surface soldered first with an adhesive or the like. In addition, a component that allows the lead wire to penetrate the substrate is mounted on the previously soldered surface. In detail, discrete components are mechanically mounted, and hand-mounted components that are expensive or impossible to mount on the machine are manually mounted. After each component is mounted, flow soldering is performed by passing the surface opposite to the soldered surface through a jet of solder to electrically connect each component to the board pattern. The soldering state of both sides of the board after soldering is inspected, and the defective part is corrected to complete the board. In addition, in order to increase the mounting density of the electrical connection between both sides of the board, it is necessary to use a through-hole board as the printed board.

Japanese Patent Laid-Open No. 5-91707 Japanese Patent Laid-Open No. 9-172755 JP 61-251462 A JP 2001-145366 A Japanese Patent Laid-Open No. 11-87907

  Since a conventional motor has power elements integrated in a one-chip integrated circuit, when the power stage has a high voltage, the device cost is increased because of having a withstand voltage with respect to the control stage. Further, in order to integrate on one chip, the capacity of the power element is limited, and the output capacity of the motor is limited.

  In addition, a cutting operation is required to expose the test pin for inspection, which requires inspection time and inspection cost. Further, the electrode is exposed after the inspection, and there is a problem that it is dangerous because the insulation distance cannot be secured when the high voltage portion is inspected.

  Further, it is necessary to perform the soldering process twice in the circuit board manufacturing process. In addition, since both sides are soldered, it is necessary to inspect the solder state on both sides, requiring an inspection time, and the inspection cost is expensive.

  Further, it is necessary to use a print using an expensive through hole with through hole processing on the substrate.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a motor with a built-in drive circuit that can handle high-voltage and high-power motors, and a fan and equipment using them.

  It is another object of the present invention to provide an inexpensive drive circuit built-in motor, a blower and a device using them, which can reduce the cost of circuit components and circuit boards.

  It is another object of the present invention to provide an inexpensive drive circuit built-in motor, a blower and a device using them, which can reduce the manufacturing cost of the circuit board.

The motor with a built-in drive circuit according to the present invention includes a drive circuit that switches high-voltage direct current by six switch elements and applies an alternating voltage to the motor, and the six switch elements of the drive circuit according to the rotor position of the motor. In a drive circuit built-in motor with a built-in control circuit that determines the switch pattern of
A general-purpose high-voltage switch main element composed of a plurality of IC chips is used for six switch elements, and a circuit including a diode connected in reverse parallel to each of the general-purpose high-voltage switch main element and the general-purpose high-voltage switch main element is the same. A module IC mounted and molded in a package;
Mounting a module IC on a surface opposite to the solder surface on which the surface mount component is mounted, a circuit board composed of a printed circuit board and soldered with flow solder;
A circuit board and a motor stator are combined, and a resin molded stator mold,
An IC integrated with a control circuit, which is provided only on a chip with a withstand voltage of less than 60 V, which is provided on a solder surface on which a surface mounting component of a circuit board is mounted, and generates a drive signal for a module IC based on rotor position information; With
Three of the six switch elements in the upper stage are characterized in that current drive is performed using high voltage transistors with high breakdown voltage.

  The motor with a built-in drive circuit according to the present invention can provide a motor with a built-in drive circuit that can handle high-voltage, high-power motors. Further, the cost of circuit components and circuit boards can be reduced, and an inexpensive drive circuit built-in motor can be obtained. It is composed of a module IC in which a circuit including a general-purpose high withstand voltage switch main element of 60V or more composed of a plurality of IC chips is mounted and molded in the same package, and a printed circuit board having a double-sided non-through wiring mounted thereon. A circuit board that is soldered by one-time flow soldering, a circuit board and a motor stator are combined, a resin-molded stator mold, and a module IC drive signal that generates a module IC drive signal based on rotor position information. Since it has a configuration including a low-voltage control circuit composed only of a chip, it can cope with a high-voltage, high-output motor, and can reduce the cost of circuit components and a circuit board.

FIG. 3 is a diagram showing the first embodiment and is a system block diagram of a brushless motor. FIG. FIG. 3 is a diagram showing the first embodiment and is a system block diagram of a brushless motor drive circuit. FIG. It is a figure which shows Embodiment 1 and is a structural diagram of a brushless motor. FIG. 3 is a diagram illustrating the first embodiment and is a structural diagram of a circuit board of a brushless motor. FIG. 3 is a diagram showing the first embodiment and is a flowchart showing a process of creating a circuit board of the motor. It is a figure which shows Embodiment 2, and is a structural diagram of a brushless motor. It is a figure which shows Embodiment 2, and is a structure figure of the circuit board of a brushless motor. It is a figure which shows Embodiment 2, and is a half sectional view of a structure at the time of attaching the motor of Embodiment 1 to the indoor unit of a residential air conditioner. It is a figure which shows Embodiment 2, and is a flowchart figure which shows an assembly and inspection process of a motor. It is a figure which shows Embodiment 3, and is a structural diagram of a brushless motor. It is a figure which shows Embodiment 3, and is a structure figure of the circuit board of a brushless motor. It is a figure which shows Embodiment 3, and is a flowchart figure which shows an assembly and inspection process of a motor.

Embodiment 1 FIG.
1 to 5 are diagrams showing Embodiment 1, FIG. 1 is a system block diagram of a brushless motor, FIG. 2 is a system block diagram of a brushless motor drive circuit, FIG. 3 is a structural diagram of the brushless motor, and FIG. FIG. 5 is a flowchart showing a process for creating a motor circuit board.

  In FIG. 1, the rectifying / smoothing circuit 1 includes a bridge diode D1 and a smoothing capacitor C1. The brushless motor includes a stator winding 2, a permanent magnet rotor 3, and a rotor position sensor 4 that are three-phase connected. The control circuit 5 includes drive signal generation means 7, commutation signal generation means 8, speed error signal generation means 9, and PWM control means 10. Further, the control circuit 5 is a one-chip IC as a driver IC. The drive circuit 11 includes a switching power element unit 6 composed of six switching power elements and diodes connected in antiparallel with each other, and a power element driving unit 12.

  With the above configuration, the output signal of the rotor position sensor 4 is subjected to logic processing by the commutation signal generation means 8, and the output signal is transmitted to the drive signal generation means 7 to output the commutation signal to the switching power element section 6. The speed command signal received from the outside by the speed error signal generating means 9 and the rotation signal obtained by synthesizing the output signal of the rotor position sensor 4 are compared to obtain a speed error signal. The speed of the brushless motor is controlled by controlling the PWM duty of the switching power element so as to reduce the error signal. The rotation speed signal is obtained by synthesizing the output signal of the rotor position sensor 4, but the rotation speed signal may be obtained from a frequency generator provided separately from the rotor position sensor 4.

  In FIG. 2, IC2 13 is a module IC in which six transistors and diodes connected in antiparallel are mounted and molded with a 250V high withstand voltage switch main element circuit composed of a plurality of IC chips in the same package. The power element drive unit 12 drives six high voltage transistors based on a 5V drive signal.

  In the first embodiment, in the configuration described above, based on the 5V drive signal from the control circuit 5 in FIG. 1, the lower three of the 6 power transistors of the switching power element section 6 are 5V drive signals. It is driven by a 15V system drive signal having the same ground potential. The upper three power transistors are driven by current using high-voltage transistors having a withstand voltage of 250V. In this way, the power transistor is driven to control the voltage applied to the motor winding.

  In the first embodiment, the power transistor is set to have a withstand voltage of 250 V, but a configuration using a general-purpose high withstand voltage transistor of 60 V or more may be used. Cost can be reduced by using a general-purpose high voltage transistor.

  The drive signal from the control circuit 5 is a 5V system, but it may be a low-voltage control circuit constituted by a general-purpose microcomputer of less than 60V or a general-purpose motor drive-dedicated IC that can use the IC low-voltage design rule. As a result, the circuit board can be miniaturized and the drive circuit can be easily incorporated. Furthermore, the same effect is acquired by making the main component of the low voltage | pressure control circuit into surface mounting.

  Further, although the upper three transistors are driven by current, voltage driving using a level shift circuit using HVIC or an insulating circuit using a photocoupler or an insulating transformer may be used.

  With such a configuration, the motor and its drive circuit combined with high efficiency, the circuit component mounting area is small, and the motor with built-in drive circuit can be configured with general-purpose semiconductor components without using special semiconductors. Can be obtained.

  Furthermore, as will be described later, in the motor with a built-in drive circuit board that is limited in the size of the circuit board by reducing the mounting area of the circuit parts, the necessary circuit parts can be provided on the double-sided non-through printed board that does not require the double-sided through processing. All can be mounted, and a copper foil land for inspection can be formed on the substrate.

  In FIG. 3, the circuit board 20 includes a drive circuit and a control circuit. The input / output terminal 21 is mounted on a circuit board and has an electrical connection with the outside of the motor. The stator core 22 of the motor is wound with the stator winding 2 of FIG. The stator part 23 is obtained by molding a circuit board 20, an input / output terminal 21, and a stator core 22 with a resin. The magnetized rotor magnet 24 constitutes a combined rotor portion with the shaft 25. The bearing 26 supports the shaft 25 and is fixed to the bracket 27 or the stator portion 23.

  In the present embodiment, the stator portion 23, the rotor portion, the bearing 26, and the bracket 27 are combined to constitute a motor. The magnetic flux of the rotor magnet 24 is picked up by the rotor position sensor 4 and the motor is operated.

  FIG. 4 is a structural diagram of the circuit board 20 of the brushless motor, and FIG. 4A is a diagram of the surface on the stator core 22 side in FIG. FIG. 4B is a view of the surface on the side opposite to the stator core in FIG. In FIG. 4 (a), a circuit pattern made of copper foil is formed on both surfaces of the base material, but the above-described rotation is applied to the printed board 28 of the double-sided non-through wiring without electrical coupling between the copper foils on both sides of the base material. Child position sensor 4, IC 5 with integrated control circuit, input / output terminal 21 having electrical connection with the outside of the motor, formed on a copper foil on the substrate for electrical connection between the stator winding 2 and the circuit board The land 29 is provided.

  In FIG. 4B, IC2 13 is a module IC in which a high-voltage switch main element circuit of 250 V constituted by six transistors and diodes connected in anti-parallel is composed of a plurality of IC chips is mounted in the same package. It is. The land 29 is used for electrical connection between the stator winding 2 and the circuit board. A lead jumper wire 30 electrically connects both sides of the substrate. The lead jumper wire 30 is a lead wire in which solder is coated on the lead wire before soldering. The lead jumper is used in combination with a solderless lead jumper for wiring that does not require electrical connection between both sides.

  A circuit board manufacturing process according to the first embodiment will be described with reference to FIGS. First, surface mount components such as the control IC of the control circuit 5 and the rotational position sensor 4 are fixed to the stator side surface with an adhesive or the like. On the opposite surface, components such as a module IC 213 and a lead jumper wire 30 that allow lead wires to penetrate the substrate are mounted. After each component is mounted, flow soldering is performed by passing the surface opposite to the soldered surface through a jet of solder to electrically connect each component to the board pattern. At this time, the soldered lead jumper wire 30 is melted by heat from the jet solder at the time of flow soldering and soldered to the pattern on the opposite side of the jet to obtain an electrical connection between both sides. The soldered state of the board after soldering is inspected, and a defective part such as a solder bridge or insufficient solder is corrected to complete the board.

  Such a configuration and an inspection method can be obtained by taking the circuit configuration described above. If such a configuration and inspection process are used, the soldering of the circuit board can be completed in a single process if there is no rework. Further, since the module IC2 13 is mounted on the circuit board 20 on the opposite surface of the motor stator, that is, on the mold surface side, the module IC2 13 is hardly affected by the heat of the stator winding 2 and has an effect of lowering the temperature around the module IC213. .

Embodiment 2. FIG.
FIGS. 6 to 9 are diagrams showing the second embodiment, FIG. 6 is a structural diagram of a brushless motor, FIG. 7 is a structural diagram of a circuit board of the brushless motor, and FIG. FIG. 9 is a flowchart showing the assembly and inspection process of the motor when it is attached to the machine. In FIG. 6, a hole 32 for inspection, which is a portion that is not pressed by a mold during molding with resin, is provided, and electrical inspection can be performed from the outside of the motor. The other structure is the same as that shown in FIG.

  FIG. 7A is a diagram of the surface on the stator core 22 side in FIG. FIG. 7B is a view of the surface on the side opposite to the stator core in FIG. In FIG. 7 (a), the hole 33 formed in the printed board has a dimension relative to the magnetic flux of the rotor magnet. It has a function to fix the stator parts with high accuracy so that dimensional accuracy can be obtained. The other structure is the same as that shown in FIG. 4A shown in the first embodiment, and a description thereof is omitted.

  FIG. 7B shows a land 34 of copper foil formed around the hole 33 formed in the printed board described in FIG. Usually, a resist coating with an insulating material is performed on the copper foil pattern for a circuit board so as not to carry solder. However, the copper foil land 34 is not coated with a resist, and the copper foil is exposed. Further, the land 34 of the copper foil is pressed by a mold during molding with resin, and the molding resin is molded with the copper foil exposed. The potential of the land is the same as that of the portion connected to the one-phase substrate of the motor winding. Thereby, the inspection from the outside of the motor becomes possible. The depth of the inspection hole 32 is a depth at which a sufficient withstand voltage can be obtained with respect to the potential difference between the previous potential and the motor outer peripheral portion. The depth of the inspection hole 32 is such a depth that an air layer equal to or higher than the withstand voltage between the motor surface and the land surface can be secured.

  In FIG. 8, the blade | wing 41 for ventilation is fixed to the shaft of the motor 40, and the component 42 which fixes a motor is resin with insulation. As described above, when the outer periphery of the motor is fixed with an insulating part when the motor 40 is mounted, the position of the inspection hole 32 is concealed with the insulating part. No.

  The rest of the structure is the same as that shown in FIG. In this figure, in order to make the drawing easy to see, the inspection hole 32 is provided at one location having the same potential as that of the motor winding phase, but in actuality, it is assumed to be a portion having the same potential as other phases and other internal signals necessary for the inspection.

  The motor assembly and inspection process of the second embodiment will be described with reference to FIGS. First, the circuit board 20 and the stator core 22 provided with the winding are mechanically temporarily fixed, and then electrically coupled to the winding using the land 29. The stator core 22 with the winding to which the circuit board 20 is coupled is set in a mold, the position is fixed, resin is injected into the mold, and resin molding (molding) is performed to form the stator portion 23.

  At this time, the inspection hole 32 is formed so that the land of the substrate is exposed at the convex portion of the mold described above. The pressing of the mold for exposing the land also serves as a function for improving the positional accuracy of the circuit board and the stator, thereby improving productivity. The completed mold part is electrically inspected using the input / output terminal 21 having an electrical connection between the exposed land and the outside of the motor. At this stage, an object that has failed during molding can be rejected by inspection. Further, the molded part which has become a non-defective product by inspection is assembled into a motor together with a rotor part composed of a rotor magnet 24 and a shaft 25, a bearing 26 and a bracket 27.

  Further, the assembled mold part is electrically inspected using the input / output terminal 21 having an electrical connection between the exposed land and the outside of the motor. Specifically, the rotor is rotated by an external force, and first, the phase flux is used to inspect the motor flux amount that affects the motor output characteristics and efficiency. Furthermore, using the induced voltage generated at the phase terminal and the rotor position signal generated by the rotor position sensor 4, the time interval between the induced voltage zero cross and the position signal that affects the motor characteristics, efficiency, and noise is inspected. . All inspections are performed automatically.

  In the motor of the second embodiment, the inspection hole 32 is completed as it is because the insulation is ensured as described above. In particular, when the motor is a special-purpose product used in a high-humidity atmosphere or a dew condensation environment, the inspection hole 32 may be filled with resin or closed with a part such as a cap. Thereby, insulation is ensured even when the motor is used in a high humidity atmosphere or a dew condensation environment.

  The configuration and the inspection method using the inspection land can be obtained by adopting the circuit configuration described in the first embodiment. Use of such a configuration and inspection process is advantageous for heat dissipation, and in a motor with a built-in drive circuit in which a circuit is molded together with a stator having high reliability such as moisture resistance, a portion that cannot be normally inspected is inspected. By enabling inspection, the assembly process of motor-mounted products and the quality in the market can be dramatically improved. In addition, there is no need to provide a new process for an air blower motor for an indoor unit of an air conditioner in which the periphery of the motor is fixed with insulating parts. Further, since the copper foil land of the circuit board for inspection is used, it is not necessary to mount a special circuit component which is usually expensive.

Embodiment 3 FIG.
FIGS. 10 to 12 are diagrams showing the third embodiment, FIG. 10 is a structural diagram of a brushless motor, FIG. 11 is a structural diagram of a circuit board of the brushless motor, and FIG. 12 is a flowchart showing an assembly and inspection process of the motor. In FIG. 10, a fuse 35, which is a part that can be electrically cut by flowing a current, is mounted on the pattern of the circuit board 20. The fuse 35 can be electrically inspected from the outside of the motor by mounting one end on the substrate by soldering and molding the other end so as to be exposed to the outside of the mold. The other structure is the same as that shown in FIG.

  Fig.11 (a) is a figure of the surface at the side of the stator core 22 in FIG. FIG. 11B is a view of the surface on the side opposite to the stator core in FIG. FIG. 11A is the same as FIG. 4A shown in the first embodiment, and a description thereof is omitted.

  In FIG. 11B, a copper foil land 36 is formed at the position of the fuse 35. One end of a fuse 35 is mounted on the copper foil land 36 by soldering, and the other end is pressed by a mold during molding with resin and resin is molded. The potential of the copper foil land 36 is the same as that of the portion connected to the one-phase substrate of the motor winding. Thereby, the inspection from the outside of the motor becomes possible. In addition, when the fuse 35 is disconnected, an object that can secure an air layer higher than the withstand voltage between the motor surface and the land surface is selected. The rest of the structure is the same as that shown in FIG. In this figure, in order to make the drawing easy to see, the fuse is set at one place having the same potential as that of the motor winding phase, but in reality, it is set as a portion having the same potential as other phases and other internal signals necessary for inspection.

  The assembly and inspection process of the motor according to the third embodiment will be described with reference to FIGS. First, the circuit board 20 and the stator core 22 with the windings are mechanically temporarily fixed, and then electrically connected to the windings using the lands 29. The stator core 22 to which the winding with the circuit board 20 is coupled is set in a mold, the position is fixed, resin is injected into the mold, and resin molding (molding) is performed to form the stator portion 23. At this time, one end of the above-described fuse 35 that is not soldered is molded so as to be exposed by a mold.

  The completed mold part is electrically inspected using the input / output terminal 21 having an electrical connection between one end of the exposed fuse 35 and the outside of the motor. At this stage, an object that has failed during molding can be rejected by inspection. Further, the molded part which has become a non-defective product by inspection is assembled into a motor together with a rotor part composed of a rotor magnet 24 and a shaft 25, a bearing 26 and a bracket 27.

  Further, the assembled mold portion is electrically inspected using the input / output terminal 21 having an electrical connection between one end of the exposed fuse 35 and the outside of the motor. Specifically, the rotor is rotated by an external force, and first, the phase flux is used to inspect the motor flux amount that affects the motor output characteristics and efficiency. Furthermore, using the induced voltage generated at the phase terminal and the rotor position signal generated by the rotor position sensor 4, the time interval between the induced voltage zero cross and the position signal that affects the motor characteristics, efficiency, and noise is inspected. . All inspections are performed automatically. After the inspection, the fuse is surely blown to ensure insulation and complete.

  The configuration and the inspection method using the inspection land can be obtained by adopting the circuit configuration described in the first embodiment. Use of such a configuration and inspection process is advantageous for heat dissipation, and in a motor with a built-in drive circuit in which a circuit is molded together with a stator having high reliability such as moisture resistance, a portion that cannot be normally inspected is inspected. By enabling inspection, the assembly process of motor-mounted products and the quality in the market can be dramatically improved. In addition, in a blower motor for an outdoor unit of an air conditioner that requires moisture resistance, it is not necessary to provide a new process other than the fusing time of a fuse that is completed in a very short time. As described above, in the present embodiment, in particular, in the case of a product in which the motor is used in a high humidity atmosphere or a dew condensation environment, it is not necessary to fill the hole after the inspection with resin, and it is not necessary to close the hole with a component such as a cap.

Embodiment 4 FIG.
In the third embodiment, one end of each electrode of the fuse 35 is mounted between the substrate and the outside of the motor. Both poles of the element are mounted on the substrate, and the land position having the same potential as the one end is shown in the second embodiment. Needless to say, the same effect can be obtained even if the hole is inspected and then melted.

Embodiment 5 FIG.
Although Embodiments 1 to 4 have been described using a brushless motor and an air conditioner blower, other drive circuit built-in motors such as induction motors, manufacturing and inspection methods thereof, blowers using them, cold air conditioners, and more specifically It goes without saying that the same effect can be obtained even when applied to devices such as a ventilation fan, a refrigerator, an air purifier, and a dehumidifier.

  DESCRIPTION OF SYMBOLS 1 Commutation smoothing circuit 2 Stator winding 3 Permanent magnet rotor 4 Rotor position sensor 5 Control circuit 6 Switching power element part 7 Drive signal generation means 8 Commutation signal generation means 9 Speed error signal Generation means, 10 PWM control means, 11 drive circuit, 12 power element drive section, 13 IC2, 20 circuit board, 21 input / output terminal, 22 stator core, 23 stator section, 24 rotor magnet, 25 shaft, 26 bearing, 27 bracket, 28 Double-sided non-through printed circuit board, 29 lands, 30 lead jumper wires, 32 holes for inspection, 33 holes drilled in printed circuit boards, 34 copper foil lands, 35 fuses, 36 copper foil lands, 40 motors, 41 Fan for blowing air, 42 Parts for fixing the motor.

Claims (8)

A drive circuit that switches high-voltage direct current by six switch elements and applies an alternating voltage to the motor, and a control circuit that determines a switch pattern of the six switch elements of the drive circuit according to the rotor position of the motor; In a motor with a built-in drive circuit,
Using switches main elements of 60V or more breakdown voltage composed of a plurality of IC chips in the six switching elements, including a reverse diode connected in parallel to the respective front Kiss switch main element before kissing switch main element A module IC in which a circuit is mounted and molded in the same package;
The module IC is mounted on a surface opposite to the solder surface on which the surface mounting component is mounted, and is configured by a printed circuit board, and the circuit board on which the pattern of the surface mounting component and the printed circuit board is soldered by flow solder;
A stator mold in which the circuit board and the motor stator are combined and resin molded,
The control circuit comprising only a chip with a withstand voltage of less than 60 V, which is provided on a solder surface on which the surface mounting component of the circuit board is mounted, and generates a drive signal for the module IC based on position information of the rotor. An integrated IC,
Drive circuit incorporated motor to three inner upper of the six switching elements, characterized by performing a current drive using a 60V or more withstand bets transistor.   2. The drive circuit built-in motor according to claim 1, wherein the module IC is mounted on the surface opposite to the motor stator, that is, on the mold surface side on the circuit board. Drive circuit built motor according to claim 2, characterized in that the main components of the previous SL control circuit and surface mounting. 4. A part of a lead jumper wire provided so as to penetrate the circuit board is a lead wire with solder, and electrically couples both surfaces of the circuit board. The motor with a built-in drive circuit described.   On the pattern of the printed circuit board, one end of a fuse, which is a component that can be electrically cut by flowing an electric current, is mounted by soldering, and the other end is electrically exposed to the outside of the mold. The drive circuit built-in motor according to claim 1, wherein the drive circuit built-in motor is performed.   6. The motor with a built-in drive circuit according to claim 5, wherein one end of the fuse is soldered to a pattern having the same potential as each phase of the motor winding on the circuit board.   A blower using the drive circuit built-in motor according to claim 1.   A device using the blower according to claim 7.

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