KR200222903Y1 - The structure of an installation part of a hall IC and the structure of the core with seperated pole-hall for a two phased BLDC MOTOR - Google Patents

Abstract

The present invention relates to a hole IC mounting structure of a two-phase BLDC motor and a core structure having a pole separation groove. In the Skelton-type small two-phase BLDC motor, a hole IC is accommodated so that the hole IC is stored by cutting the lower end of the inner diameter of the core. And the extension line connecting the hole IC center and the center of the core inner diameter to a hole separation groove, which is an air gap between the inner diameter of the core and the magnet, so that the hole IC is not located at the extremely divided interface of the magnet. By forming an angle, the Hall IC is not located at the polarized boundary of the magnet, so that the magnetic flux flows smoothly, so that the DP (dead point) is removed, and the coil flows through the gap between the pole separation groove and the magnet. The torque generated by the interaction between the current and the magnetic field is raised, and the magnet rotates smoothly, which not only improves the performance of the motor but also lowers power consumption. As a result, it is possible to contribute to energy saving.

Description

The structure of an installation part of a hall IC and the structure of the core with seperated pole-hall for a two phased BLDC MOTOR}

The present invention relates to a hole IC mounting structure of a two-phase BLDC motor and a core structure having a pole separation groove. In the Skelton-type small two-phase BLDC motor, a hole IC is accommodated so that the hole IC is stored by cutting the lower end of the inner diameter of the core. And the extension line connecting the hole IC center and the center of the core inner diameter to a hole separation groove, which is an air gap between the inner diameter of the core and the magnet, so that the hole IC is not located at the extremely divided interface of the magnet. By forming the angle, it is possible to change the flow of current quickly, reduce the gogging torque, and eliminate the DP (Dead Point). It is about.

Most conventional motors use commercial AC power as a driving power source, control the rotational speed of the motor by the frequency of the commercial AC power, and detect the position of the rotor by the shading coil. .

However, in order to use various rated rotation speeds, a complicated control circuit was separately required, and thus the energy loss rate was about 80% of the input value, causing serious energy waste.

In order to overcome this drawback, the power consumption can be reduced by detecting the position of the rotor using Hall IC instead of the Shading Coil which causes large current flow and decreases efficiency. It is a motor using Hall IC that can control the rotation speed by voltage.

However, the most important thing in a motor adopting Hall IC is DP (Dead), which is a factor in which the motor does not rotate or the motor does not rotate smoothly when the power is turned off and on again when the motor is driven. Point must be minimized.

In order to remove the dead point (DP), a variety of methods have been used, such as adjusting the distance between the core and the magnet or changing the shape of the core.

The present invention was devised to solve the above problems, and in the Skelton type small two-phase BLDC motor, the lower portion of the inner diameter of the core is cut to form a hall IC accommodating part for accommodating the hall IC, and the hall IC is a magnet. The polarization groove, which is the air gap between the core inner diameter and the magnet, is formed to form a predetermined angle with an extension line connecting the center of the hole IC accommodating portion and the center of the inner diameter of the core so as not to be located at the polarly divided boundary of the current. The object of the present invention is to provide a core structure having a hole IC mounting structure and a pole separation groove of a two-phase BLDC motor capable of quickly changing the flow and reducing the goging torque to remove a dead point (DP).

1 is a cross-sectional view showing the overall configuration of the present invention,

2 is a perspective view of main parts of the present invention,

3 is a cross-sectional view of the core of the present invention,

Figure 4 is a side view of the bracket on the PCB substrate side of the present invention,

5 is a control circuit diagram module to the PCB substrate of the present invention.

<Description of the code | symbol about the principal part of drawing>

10 magnet 11 rotation axis

20, 20a: core 22: coupling protrusion

22a: coupling groove 23: Hall IC housing

26, 26a: pole separation groove 30, 30a: bracket

s40: bobbin 43, 43a: coil

45, 45a: fixing groove 46: PCB substrate fixing member

50: PCB substrate 51: sensor cover

52, 52a: Guide groove 60: Hall IC

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration and operation of the subject innovation.

1 is a cross-sectional view showing the overall configuration of the present invention, Figure 2 is a perspective view of the main part of the present invention, Figure 3 is a cross-sectional view of the core of the present invention, Figure 4 is a side view of the bracket on the PCB substrate side of the present invention, Figure 5 As a control circuit diagram modularized to a PCB substrate, the configuration of the present invention is a separate core 20 having an inner diameter corresponding to the outer diameter of the magnet 10 coupled to the rotating shaft 11 as shown in Figs. 20a, a bobbin coupled to the bobbin coupling groove 21 formed by coupling the brackets 30 and 30a coupled to the left and right sides of the cores 20 and 20a and the cores 20 and 20a. 40 is fixed by the PCB substrate coupling member 41 formed on both sides of one side of the bobbin 40 in the coupling direction, and supports the hall IC 60 by the sensor cover 51 coupled to the upper side thereof. It consists of a PCB substrate 50.

Between the magnet 10 and the brackets 30 and 30a, the collars 31, 31a, the washers 32, 32a, and the bearings 33, 33a are symmetrically from the magnet 10 side. Each is installed, and gaskets 34 and 34a are respectively installed to be coupled to the inside of the brackets 30 and 30a.

In addition, the oil grooves 35 and 35a are formed in the brackets 30 and 30a so that the rubber packings 35 and 35a can be coupled.

The detachable cores 20 and 20a form a coupling protrusion 22 and a coupling groove 22a to be coupled to each other at the lower end thereof so that the bobbin coupling groove 21 is formed by coupling to each other. The lower portion of the inner diameter of the core 20 is partially cut to form the hole IC accommodating portion 23, and the bracket coupling grooves 24 and 24a and the bracket 30 are coupled to the brackets 30 and 30a. Guide grooves 25 and 25a are formed to guide the guide members (not shown in the drawing) formed at 30a to facilitate engagement.

In addition, a part of the core 20 (20a) separated surface is cut to have a larger diameter than the inner diameter of the core 20 (20a) so that the pole separation groove which is an air gap between the inner diameter of the core 20 (20a) and the magnet 10 ( 26) 26a, which is the center of the inner diameter of the cores 20 and 20a coupled with the center of the hole IC accommodating portion 23 so that the hole IC 60 is not located at the polarized interface of the magnet 10. Make a predetermined angle with the extension line connecting the.

On the other hand, the bobbin 40 is a coil 43, 43a is wound symmetrically around the center separating wall 42, the insertion groove is inserted into the lower end of the core 20a to be coupled to the bobbin coupling groove 21 A coupling member 41 for coupling and fixing the PCB substrate 50 formed at both end surfaces of one side in the coupling direction thereof is formed, and the fixing grooves 45 formed in the two coupling members 41 symmetrically, respectively. 45a is formed and is configured to couple the fixing member 46.

The PCB substrate 50 supports the hall IC 60 by coupling the sensor cover 51 to the upper side thereof, and a pair of guide grooves 52 and 52a are formed on the left and right sides, respectively, to fix the grooves. Corresponding to 45) (45a) was to be fixed by the fixing member 46.

On the other hand, the shape of the one side bracket (30a) has a sensor cover guide groove 36 is formed to cut the lower end portion to guide the sensor cover 51, the coupling groove 37 formed on the left, right ( 37a is formed to correspond to the bracket coupling grooves 24 and 24a of the core 20.

The PCB substrate 50 described above is a module (Modules) known control circuit for controlling the drive of the motor, by referring to the operation of this circuit to quickly switch the flow of current, which is the aim of the present invention to achieve, The operation to remove the dead point (DP) by reducing the gogging torque will be described. Here, since this control circuit is a known circuit, a detailed circuit configuration is omitted.

The hall IC 60 senses the movement of the magnet 10 to generate a square wave voltage, and the square wave signal is applied to the base of the switch Q1 to perform a switching operation so that a current flows. At the same time, the signal of the collector portion of the switch Q1 is applied to the base of the switch Q2, and the collector waveform and phase of the switch Q1 are changed 180 degrees and output.

The resistors R1 and R2 are used as pull up resistors at the input of the hall IC 60, and the resistors R3 and R4 are used to supply sufficient current to the base side of the switch Q2.

Diode D1 was used for constant voltage, Zener diodes ZD1 and ZD2 were used to prevent counter voltage during switching, and capacitors C1 and C2 used as auxiliary power supplies were used to increase the rotation direction and torque of the motor. .

Therefore, a current flows through the coils 43 and 43a, and the switches Q1 and Q2 are switched to cause the magnet 10 to rotate. The rotation of this magnet changes the output of the hall IC 60, and the waveforms of the switches Q1 and Q2 are switched when the magnet is rotated by 180 degrees.

As a result, current flows in the coils 43 and 43a, and the Hall IC 60 receives the signal from the motor 10, and the left rotation of the magnet 10 is continuously maintained by the inertia force of the left turn and the suction and repulsion force of the new magnet. Will be.

At this time, the pole separation grooves 26 and 26a, which are the air gaps between the inner diameters of the cores 20 and 20a and the magnets 10, are centered in the center of the hole IC accommodating portion 23 and the cores 20 and 20a. Since the hole IC 60 is not positioned at the extremely divided interface of the magnet 10, the magnetic flux flows smoothly, and the DP (Dead Point) is formed. The torque generated by the interaction between the current flowing through the coils 43 and 43a and the magnetic field is increased by the gap between the pole separation grooves 26 and 26a and the magnet 10. 10 rotates smoothly.

Therefore, the Hall IC mounting structure of the two-phase BLDC motor that can quickly switch the flow of current which is the aim of the present invention and reduce the gogging torque by the operation as described above, can eliminate the dead point (DP). And a core structure having polar separation grooves.

The effect obtained by using the present invention having the configuration and operation as described above is a two-phase BLDC Skelton type small motor, which uses a Hall IC for detecting the position of the permanent magnet and the rotor used as the rotor. The hole IC is formed by separating the core of the motor and forming the pole separation groove, which is an air gap between the core inner diameter and the magnet, to form a predetermined angle with an extension line connecting the center of the hole IC housing and the core inner diameter. It is not located on the boundary of the dividing line, so the flow of magnetic flux is smooth and DP (Dead Point) is removed, which not only improves the performance of the motor, but also contributes to energy saving by achieving low power consumption. This is a very useful effect.

Claims (1)

In the motor IC mounting structure and core structure of a motor having a separate stator core, a stator coil, a magnet that is a rotor, and a Hall IC that detects the rotational position of the rotor, A part of the inner diameter lower end of one core 20 of the cores 20 and 20a is partially cut to form a hall IC accommodating part 23; A part of the core 20 and 20a is cut off to have a larger diameter than one of the inner diameters of the core 20 and 20a so that the pole separation groove 26 is an air gap between the inner diameter of the cores 20 and 20a and the magnet 10. The center of the inner diameter of the cores 20 and 20a coupled to each other so that the hole IC 60 is not located at the polarized interface of the magnet 10. Make a predetermined angle with one extension line; The sensor cover 51 is coupled to the upper side of the PCB substrate 50 so as to support the hall IC 60 so that the hall IC 60 is accommodated in the hole IC accommodating part 23. Hall IC mounting structure and core structure with pole separation groove of phase BLDC motor.