JPH0349552A - Motor controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a motor control device for controlling the rotation of a rotor in a brushless motor.

2. Description of the Related Art Conventionally, this type of motor control device has had a configuration as shown in FIGS. 6 and 7. In Figures 6 and 7, 1 is a magnetic sensor, 2 is a component that is not affected by the magnetic force of the magnet,
3 is a component that is affected by the magnetic force of the magnet, and is mounted on the board 4. The terminal 5 is embedded in the case 6 in advance and is connected to the magnetic sensor 1 and a component 2 that is not affected by the magnetic force of the magnet.
After mounting the board 4 mounted with the board 4 to the case 6, the board 4 and the terminals 5 are connected. This connection is generally done by hand soldering and is time consuming. Thereafter, the parts 3 that are affected by the magnetic force of the magnets are manually attached and then coated with resin 7.

Thereafter, the coil 8 is attached to the case 6, and the rotor 9 is attached to face the complete case. Magnets 10 and 11 are attached to the rotor 9 in point-symmetrical positions, and when the magnets ↓O or above the magnetic sensor 1, the circuit is turned on and current flows through the coil 8, attracting the magnet l1. Therefore, torque is generated and the rotor starts rotating. When the magnet 11 moves above the coil 8, the magnet 10 is displaced from the top of the magnetic sensor 1, which turns the circuit off and current no longer flows through the coil 8. The attractive force between the magnet 1l and the coil 8 disappears, and the rotor rotates by inertia. continue. Thereafter, the magnets 10 and 11 continue to move in the same manner as described above, with the magnets 10 and 11 in opposite states. The rotor has a fulcrum fixed between the upper case 12 and the case 6.

Problems to be Solved by the Invention Although the operation of the motor is as described above, it has been difficult to produce a motor with a conventional configuration.

In addition, due to the large amount of manual work involved, there were problems in that the positional accuracy of the magnetic sensor was poor and the rotational speed of the motor was not accurate.

Means for Solving the Problem In order to solve this problem, the present invention is equipped with a sensor that detects the magnetic force of a magnet attached to the rotor in the area where the rotor rotates, and a component that is not affected by the magnetic force. At the same time, a terminal is mounted on the periphery where the rotor moves to take out a signal to the outside, and a component that is affected by the magnetic force of the magnet is mounted on an outer area opposite to the area where the rotor rotates, with the terminal as a boundary. and a coil are arranged on the same plane and fixed to the case.

Effect: With this configuration, the motor control device is easy to manufacture and automation can be achieved, making it easy to obtain the positional accuracy of the magnetic sensor and the accuracy of the rotational speed of the motor.

Embodiment FIGS. 1 and 2 are a perspective view and a sectional view of a motor control device according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of the same, FIG. 4 is an electrical wiring diagram, and FIG. 5 is an explanation of the principle. 1 and 2, 101 is a magnetic sensor, 102 is a component that is not affected by the magnetic force of the magnet, and 103 is a component that is affected by the magnetic force of the magnet, which are mounted on a board 104. Terminals 105 are fixed to substrate 104 and electrically connected. After that, the board 104 is inserted into the case 106 and the resin 1
Coat 07. Thereafter, the coil 108 is attached to the case 106, and the rotor 109 is attached facing the completed case. The rotor 109 has a magnet 11
0 and 111 are attached in point-symmetrical positions, and when the magnet 110 is placed on the magnetic sensor 101, the circuit shown in FIG.
1, torque is generated and the rotor 109 begins to rotate. When the magnet 110 is shifted from above the magnetic sensor 101, the circuit is turned off, current no longer flows through the coil 108, the attractive force between the magnet 111 and the coil 108 disappears, and the rotor continues to rotate by inertia.

Thereafter, the magnets 110 and 111 continue to move in the same manner as described above in opposite states. The rotor has a fulcrum fixed between the upper case 112 and the case 106.

Effects of the Invention As described above, according to the present invention, all the components except the coil are mounted on one board, so automatic mounting of the components is possible, and the positional accuracy of the mounted components is improved. The parts are mounted with one corner of the outer circumference of the board as the origin, so if the origin coincides with the point closest to the axis of the rotor, the relative position of the magnet attached to the rotor and the magnetic sensor on the board can be determined. Improves accuracy. Therefore, the accuracy of the rotation speed of the rotor is improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a motor control device according to an embodiment of the present invention, FIG. 2 is a sectional view showing a motor control device according to an embodiment of the present invention, and FIG. 3 is a perspective view showing a motor control device according to an embodiment of the present invention. 4 is an electrical wiring diagram of a motor control device according to an embodiment of the present invention, FIG. 5 is an explanatory diagram illustrating the rotation principle of the motor control device, and FIG. 6 is a conventional motor control diagram. A perspective view of the device, and FIG. 7 is a sectional view of a conventional motor control device. 101...Magnetic sensor 102...
Parts that are not affected by the magnetic force of magnets, 103...
Parts affected by the magnetic force of the magnet, 104... Board, 105... Terminal, 106... Case, 107... Resin, 108... ...Coil, 109...Rotor, 110,111...
...Magnet, 112...Top case.

Claims (1)

[Claims] It is equipped with a sensor that detects the magnetic force of the magnet attached to the rotor in the area where the rotor rotates and components that are not affected by magnetic force, and a terminal that outputs signals to the outside around the area where the rotor moves. A motor control device in which a circuit board and a coil are arranged on the same plane and fixed to a case, on which parts that are affected by the magnetic force of the magnet are mounted in an outer region opposite to the region in which the rotor rotates with the terminal as a boundary. .