JP2006314166A - Capacitor mounted motor and ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a capacitor mounted motor which does not incur the enlargement, the deterioration of properties, and the drop of its quality, by mounting a phase-advanced capacitor, making use of the spatially wide central part of the motor. <P>SOLUTION: A bearing housing 12, which retains a bearing 11 on an opposition load side for supporting the rotating shaft 8 of a rotor 4, is made to enter inward in the axial direction of the bracket 9 constituting an outer shell, and the phase-advanced capacitor 16 is arranged outside in the axial direction of this bracket 9. A terminal block 14 is used for arrangement of the phase-advanced capacitor 16, and it is arranged at the center in its radial direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an internal-rotation condenser-mounted electric motor and a ventilator using the same as a driving machine.

  Normally, a capacitor-equipped motor is provided with a terminal block at the end in the axial direction of a bracket that forms the outer shell of the motor, and a phase-advancing capacitor is housed in this terminal block and covered with a cover together with the terminal block (patent) Reference 1).

JP-A-3-203551

  In a motor with a capacitor, when a phase advance capacitor is mounted in the motor, it must be positioned so as not to interfere with the stator core, windings, rotating shaft and bearing. The rotating shaft and the bearing are in the center of the electric motor, and if the phase advance capacitor is arranged avoiding this position, the dimension in the radial direction of the electric motor becomes large. In view of this, some components such as a phase advance capacitor and a thermal fuse are housed in a terminal block attached to an end face of a bracket constituting the outer shell of the electric motor, and the entire terminal block is covered with a cover. The end of the bearing housing protrudes outward from the end surface of the bracket, and the terminal block is formed with a recess or hole in the center for allowing the protruding portion to escape.

  In this way, although the restriction on the arrangement of the phase advance capacitor is reduced, the phase advance capacitor cannot be arranged in the central recess or hole portion of the terminal block, and is arranged beside the recess or hole portion. The space excluding the terminal block dent or hole is narrow, and it is quite difficult to accommodate the phase advance capacitor of the required capacity. Although it is conceivable to reduce the size of the phase-advancing capacitor to the required dimension, the capacitance is reduced or the dielectric is thin and inferior in quality. If the capacitance is reduced, the characteristics are deteriorated, and if a thin dielectric or an exterior is used, the quality is deteriorated.

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is to mount a phase-advancing capacitor using a space-wide central portion of an electric motor, thereby increasing the size and the characteristics. The objective is to obtain a condenser-equipped electric motor that does not cause deterioration in quality, and to obtain a small-sized and high-performance ventilation device that uses the condenser-equipped electric motor.

  In order to solve the above-mentioned problems, the present invention forms a bearing housing that holds a bearing on the anti-load side that supports the rotating shaft of the rotor so as to enter inward in the axial direction of the bracket constituting the outer shell, A means for arranging a phase-advancing capacitor outside the bracket in the axial direction is adopted.

  According to another aspect of the present invention, a bearing housing that holds a bearing on the anti-load side that supports a rotating shaft of a rotor is formed so as to enter inward in an axial direction of a bracket that constitutes an outer shell. A means to drive the impeller with a condenser-mounted electric motor with a phase advance condenser on the outside is adopted.

  According to the present invention, a phase-advancing capacitor can be mounted using a space-wide central portion, and a capacitor-mounted electric motor that does not cause an increase in size, a deterioration in characteristics, and a deterioration in quality can be obtained.

  According to another invention, since the impeller is driven by the condenser-equipped electric motor equipped with the phase-advancing condenser using the space-wide center portion, a ventilation device with good air volume performance that can be reduced in size can be obtained. .

  The electric motor with a condenser of the present invention is an internal rotation type. The rotor is supported by bearings attached to a bracket and a frame whose rotating shaft constitutes the outer shell. The bearing on the opposite side of the bearing is fitted in a bearing housing formed on the bracket. The bearing housing is formed so as to penetrate inward in the axial direction of the bracket. Therefore, the end surface of the bracket is a substantially flat surface. A terminal block having a diameter substantially equal to the diameter of the bracket is mounted on the coaxial line on the end face of the bracket. The terminal block is formed of an insulating resin in the shape of a circular shallow container, and a phase advance capacitor is housed in the center thereof. The terminal block is covered with a cover fitted to the bracket and the frame. A ventilation device for driving the impeller is configured by using the electric motor equipped with a capacitor as a driving device.

  The phase-advancing capacitor is a high-quality capacitor with sufficient capacity and solid dielectric, and is mounted using the center of the terminal block with a large space. And since the center part of a terminal block is a position away from the circumference | surroundings and is a position which is hard to receive a disturbance, it is optimal for protection of a phase advance capacitor. Since the phase advance capacitor is in the center of the motor and does not increase the radial dimension of the motor, the capacitor-equipped motor is reduced in size, and the motor performance can be improved by increasing the capacity of the phase advance capacitor. Moreover, since the end surface of a bracket is substantially flat, a terminal block can be comprised in a flat bottom, manufacture of a metal mold | die is easy, shape balance is good, and moldability is also good. As a ventilation device, miniaturization and improvement of air flow performance can be promoted.

Embodiment 1 FIG.
1 to 6 relates to a ventilation device. 1 is a cross-sectional view of a ventilator, FIG. 2 is a cross-sectional view of a condenser-mounted motor that moves an impeller of the ventilator, FIG. 3 is a perspective view showing a stator of the condenser-mounted motor, and FIG. 4 is a condenser-mounted motor. FIG. 5 is a perspective view showing a terminal block, and FIG. 6 is a perspective view showing a cover. The condenser-mounted electric motor 3 that is a driving source for rotating the impeller 2 of the ventilation device 1 is an internal rotation type in which the rotor 4 rotates in the stator 5, and the outer peripheral portion is curved in a slot formed by a plurality of teeth. It has the stator 5 by which the coil | winding 6 was wound through the insulator made of the insulating material of the form which was made. The iron core of the stator 5 is composed of teeth and an outer ring yoke portion 7, and the outer ring yoke portion 7 is press-fitted into the teeth.

  As shown in FIG. 1, the rotor 4 is supported by a bearing 9 mounted on a frame 9 and a bracket 9 that constitutes an outer shell. The non-load-side bearing 11 of the bearings 11 is fitted or inserted into a bearing housing 12 formed on the bracket 9. The bearing housing 12 is formed by drawing into a shape penetrating inward in the axial direction of the bracket 9 as shown in FIG. Thereby, the space inside the bracket 9 is widened, and the insulation of the winding 6 can be ensured. Moreover, the end surface 13 of the bracket 9 in the axial direction is a substantially flat surface. A terminal block 14 having a diameter substantially equal to the diameter of the bracket 9 is mounted on the end face 13 of the bracket 9 coaxially by engagement of a protrusion and a hole. The pin 15 entangled with the winding 6 of the stator 5 protrudes in the axial direction through the bracket 9, penetrates from the bottom of the terminal block 14, and is electrically connected to the joint provided on the terminal block 14. ing.

  As shown in FIG. 5, the terminal block 14 is formed of an insulating resin in the shape of a circular shallow container, and a storage portion 17 for accommodating the phase advance capacitor 16 is partitioned by a partition wall 18 at the center thereof. It is stored in the storage unit 17. A fuse accommodating portion 19 for accommodating a thermal fuse is provided outside the accommodating portion 17 of the terminal block 14, and the thermal fuse is accommodated therein. The periphery of the terminal block 14 is surrounded by a peripheral wall 20, a part of the peripheral wall 20 is cut out, and the power supply lead wired to the power supply lead placement portion is drawn out from the cutout 21. The terminal block 14 is covered with a cover 22 fitted to the bracket 9 to protect the parts. The cover 22 is provided with a lead-out portion 23 for drawing the power supply lead to the outside.

  The phase advance capacitor 16 has a sufficient capacity and a high dielectric quality, and is mounted using the central portion of the terminal block 14 having a large space. And the center part of the terminal block 14 is a position far from the surroundings, is the position where it is most difficult to receive disturbance, and is surrounded by the peripheral wall 20 and the partition wall 18, and is optimal for protecting the phase advance capacitor 16. State. Since the phase advance capacitor 16 is at the center position where the radial dimension of the motor is not increased, the capacitor mounted motor 3 can be reduced in size, and the motor performance can be improved by increasing the capacity of the phase advance capacitor 16. The terminal block 14 has a flat bottom and a large storage space, and can store electrical components in addition to the thermal fuse and the power supply lead. Further, since the end surface 13 of the bracket 9 is substantially flat, the terminal block 14 can be formed in a flat bottom, the mold can be easily manufactured, the shape balance is good, and the moldability is good. The ventilation device 1 can be promoted to improve the air flow performance by downsizing the condenser-mounted electric motor 3 and improving the performance of the condenser-mounted electric motor 3.

It is sectional drawing of a ventilation apparatus. (Embodiment 1) It is sectional drawing of the electric motor with a capacitor | condenser which moves the impeller of a ventilation apparatus. (Embodiment 1) It is a perspective view which shows the stator of the electric motor with a capacitor | condenser. (Embodiment 1) It is a front view which shows the bracket of a capacitor | condenser mounting electric motor in part in cross section. (Embodiment 1) It is a perspective view which shows a terminal block. (Embodiment 1) It is a perspective view which shows a cover. (Embodiment 1)

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Ventilator, 2 Impeller, 3 Condenser electric motor, 4 Rotor, 8 Rotating shaft, 9 Bracket, 11 Bearing, 12 Bearing housing, 13 End surface, 14 Terminal block, Hexadecimal phase condenser, 18 Partition wall, 21 Notch , 22 Cover.

Claims (6)

  A bearing housing that holds the bearing on the anti-load side that supports the rotating shaft of the rotor is formed so as to enter inward in the axial direction of the bracket that constitutes the outer shell, and a phase advance capacitor is formed on the outer side in the axial direction of the bracket. An electric motor equipped with a condenser.   2. The electric motor with a capacitor according to claim 1, wherein the phase-advancing capacitor is arranged on the outer side in the axial direction of the bracket via the terminal block.   The capacitor-mounted electric motor according to claim 2, wherein the phase-advancing capacitor is disposed at a central portion in the radial direction of the terminal block, and a partition wall surrounding the outer side of the phase-advancing capacitor is provided on the terminal block.   4. A capacitor-mounted electric motor according to claim 2, wherein a component such as a power supply lead and a temperature fuse can be accommodated in a terminal block.   The capacitor-mounted electric motor according to any one of claims 1 to 4, further comprising a phase-advancing capacitor or a cover that covers the entire terminal block.   A ventilation device in which an impeller is driven by the condenser-mounted electric motor according to any one of claims 1 to 5.

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