KR20060116501A - Shading coil type single-phase hybride induction motor - Google Patents

Abstract

A shading coil type single-phase hybrid induction motor is provided to reduce manufacturing cost by using a low capacity of pressure reducing transforming unit. In a shading coil type single-phase hybrid induction motor, a power unit(10) supplies operation AC power. A pressure reduction transforming unit(20) induces a pressure reduced voltage of a predetermined level to a secondary side by receiving the AC power as a primary side voltage. A first NTC(41) supplies a starting current to a shading coil type single-phase hybrid induction motor for a machine room. A second NTC(42) supplies a starting current to a shading coil type single-phase hybrid induction motor for a freezer.

Description

SHADING COIL TYPE SINGLE-PHASE HYBRIDE INDUCTION MOTOR}

1 is a front view showing an example of a conventional shading coil type single phase synchronous / induction motor;

Figure 2 shows the entire motor assembly of a conventional shading coil type single phase synchronous / induction motor.

3 is a circuit diagram showing an example of a conventional shading coil type single phase synchronous / induction motor.

4 is a circuit diagram showing an example of a shading coil type single phase synchronous / induction motor according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shading coil type single phase synchronous / induction motor. Particularly, when a shading coil type single phase synchronous / induction motor is started for a machine room and a freezer compartment, a pressure reducing transformer having a small capacity is started by starting one of them. A shading coil type single phase synchronous / induction motor that can be used.

In general, a motor converts electrical energy into mechanical energy and can be classified into a DC motor and an AC motor according to a power source used. Among them, AC motors include induction motors, synchronous motors, and rectifier motors. Recently, synchronous / induction motors that combine the characteristics of induction motors and synchronous motors have been introduced.

Synchronous / induction motors form a double void by installing a permanent magnet, which is a synchronous motor, in the air gap between the stator and the rotor in a free rotation state.The magnetic field of the stator rotates the synchronous motor so that the synchronous motor rotates at the same speed. The magnetic flux generated in the permanent magnet of the synchronizer acts as a rotating magnetic field for the rotor while the rotor rotates.

FIG. 1 is a front view showing an example of a conventional shading coil type single phase synchronous / induction motor, and FIG. 2 is a diagram illustrating the entire motor assembly of a conventional shading coil type single phase synchronous / induction motor.

As shown in FIG. 1 and FIG. 2, the conventional shading coil type single phase synchronous / induction motor (hereinafter, abbreviated as synchronous / induction motor) includes a stator 1 fixedly installed inside a casing (not shown). , A rotor (2) rotatably inserted with a predetermined gap inside the stator (1), and a synchronizer (3) interposed freely in the gap between the stator (1) and the rotor (2). And a rotating shaft 4 which is pressed into the rotor 2 and transmits a rotating force.

The stator (1) is formed in a rectangular band or a circular shape when projecting the plane, but has a predetermined gap on one side of the center portion of the rotating body accommodating groove (1a) for accommodating the synchronizer (3) and the rotor (2) On one side of the rotating body accommodating groove (1a) is formed a coil accommodating portion (1b) for winding the main coil (5) is installed so that the stator (1) has a polarity of N pole or S pole, In the periphery of the groove 1a, the groove 1c is formed to be inclined at a predetermined angle to be positioned at a spatially appropriate angle with the main coil 5 to wind the shading coil 6 so as to generate an elliptical rotating magnetic field. have.

The rotor (2) is formed in the shape of a rod, the center of which forms a shaft hole (2a) for pressing the rotary shaft (4), the outer periphery of the number of molding the thick conductor 7 in the axial direction Conductor holes 2b are formed at equal intervals along the circumferential direction.

The synchronizer 3 is formed in a disk shape and a magnet frame (not shown) to which the rotary shaft 4 is rotatably coupled to the center thereof, and the stator 1 is fixedly coupled to the end of the magnet frame along the circumferential direction. It consists of several magnets (not shown) for rotating the rotor (2) while rotating in accordance with the magnetic field of.

The magnet frame is formed in the shape of a disc, but the central portion is provided with a shaft bearing (not shown), such as an oilless bearing, and the rotation shaft 4 is inserted and coupled thereto.

The magnet is formed in a single cylindrical shape by alternately magnetizing the N pole and the S pole along the circumferential direction.

The conventional conventional synchronous / induction motor as described above operates as follows.

That is, when a primary current is sequentially applied to the main coil 5 of the stator 1 to form alternating magnetic fields of the N pole and the S pole, and a secondary current is applied to the shading coil 6 to form a rotating magnetic field. The magnetic flux is generated in the magnet of the synchronizer 3 while the synchronizer 3 rotates in synchronization with the magnetic field. The magnetic flux acts as a rotating magnetic field and the rotor 2 slips to accelerate and synchronize. It rotates at a speed, and a rotating shaft 5 coupled to the rotor 2 rotates along the magnetic field of the main coil 7 to transmit rotational force to other parts such as a fan.

3 is a circuit diagram showing an example of a conventional shading coil type single phase synchronous / induction motor.

Referring to FIG. 3, first, an AC power supply 10 for supplying an operating AC power to a shading coil type single phase synchronous / induction motor; Motor winding M1 of the shading coil type single phase synchronous / induction motor for a machine room and motor winding M2 of the shading coil type single phase synchronous / induction motor for a freezer compartment for starting the starting current by applying the starting current from the AC power supply 10. It consists of.

Referring to the operation of the shading coil type single phase synchronous / induction motor according to FIG. 3, the AC power supply 10 transmits a starting current according to the AC power to the shading coil type single phase synchronous / induction motors M1 and M2 for the machine room and the freezing chamber. Apply simultaneously. Therefore, the shading coil-type single phase synchronous / induction motors for machine rooms and freezers are started and operated. At this time, the shaping coil-type single phase synchronous / induction motor for the machine room and the freezing compartment is a high voltage motor.

However, the conventional shading coil type single phase synchronous / induction motor as described above has to increase the number of coil turns and thinner wire diameter by applying a high voltage due to the application of AC power as it is. There was a difficult problem in production.

The present invention has been made in view of the problems of the conventional synchronous / induction motor as described above, by separately starting the fan motor for the machine room and the freezer using a plurality of NTC (switching function) to perform the switching function according to the temperature Therefore, the object of the present invention is to provide a shading coil type single phase synchronous / induction motor which can secure a low voltage starting reliability without requiring a large transformer.

The present invention for achieving the above object, in the shading coil type single-phase synchronous / induction motor for low-voltage driving for machine rooms and freezers,

A power supply unit supplying an operation AC power source;

A reduced voltage transformer configured to receive the AC power as a primary voltage and induce a reduced voltage of a predetermined level on a secondary side according to a predetermined winding ratio;

A first NTC for supplying starting current to the shading coil type single phase synchronous / induction motor for a machine room;

And a second NTC, which is configured to supply a starting current to the freezing chamber shading coil type single phase synchronous / induction motor.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that in the following description, only parts necessary for understanding the operation and operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

In the following description, specific details according to the shading coil type single phase synchronous / induction motor of the present invention are shown to provide a more general understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be readily implemented by variations of these specific details.

Hereinafter, the operation and action of the shading coil type single phase synchronous / induction motor according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a circuit diagram illustrating an example of a shading coil type single phase synchronous / induction motor according to an exemplary embodiment of the present invention.

Referring to FIG. 4, first, the motor winding M1 and the first NC 41 of the shading coil type single phase synchronous / induction motor for a machine room are connected in series. In addition, the motor winding M2 of the shading coil type single phase synchronous / induction motor for a freezer compartment and the second NC 42 are connected in series. Then, the connected first and second NCs 41 and 42 are connected to be connected in parallel with the reduced pressure transformer 20.

In addition, the first NC 41 has a smaller resistance value than the second NC 42, and the second NC 42 has a larger resistance than the first NC 41.

By such an arrangement, when the initial AC power is turned on, the reduced pressure transformer 20 receives the AC power as the primary side voltage, and the reduced voltage of the predetermined level is induced on the secondary side at the predetermined turns ratio.

Then, the reduced voltage first supplies the starting current to the motor winding M1 side of the shading coil type single phase synchronous / induction motor for a machine room on the first NC 41 side.

Subsequently, when the start of the machine room shading coil type single phase synchronous / induction motor is completed by the motor winding M1 of the machine room shading coil type single phase synchronous / induction motor, the freezing chamber shading coil on the side of the second NTC 42 side. The starting current is supplied to the motor winding M2 side of the type single phase synchronous / induction motor.

At this time, the first NTC 41 cuts off the current flowing in accordance with the characteristic that the temperature rises when the start-up of the shading coil type single phase synchronous / induction motor for a machine room increases. Accordingly, since the resistance value of the second NTC 42 is smaller than that of the first NTC 41, the starting current is applied from the reduced pressure transformer 20 according to the characteristics of the NTC, thereby shading coil type single phase synchronization for a freezer compartment. / Apply to the motor winding (M2) side of the induction motor.

That is, according to the different resistance values of the first and second NTCs 41 and 42, the shading coil type single phase synchronous / induction motors for the machine room and the freezer compartment are not started at the same time but are individually started sequentially. Therefore, since the shading coil-type single-phase synchronous / induction motor for the machine room and the freezing chamber need not be started at the same time, the capacity of the pressure reducing transformer 20 can be reduced.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. That is, considering the starting current and the cost that can be obtained according to the capacity of the decompression transformer, it can be implemented without configuring NTC. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described in detail above, the present invention is connected to NTC series of resistance values of different NCs by varying resistance values in series with the shading coil type single phase synchronous / induction motors for machine rooms and freezer rooms. Accordingly, by separately starting the shading coil type single phase synchronous / induction motors for the machine room and the freezing chamber, it is possible not only to secure the starting reliability but also to use the low-capacity pressure reducing transformer, thereby reducing the production cost.

Claims (3)

In low voltage driving shading coil type single phase synchronous / induction motor for machine room and freezer room, A power supply unit supplying an operation AC power source; A reduced pressure transformer configured to receive the AC power as a primary voltage and induce a reduced voltage of a predetermined level on the secondary side at a predetermined winding ratio; A first NTC for supplying starting current to the shading coil type single phase synchronous / induction motor for a machine room; A shading coil type single phase synchronous / induction motor, comprising: a second NTC, configured to supply a starting current to a shading coil type single phase synchronous / induction motor for a freezer compartment. The method of claim 1, wherein the first and second NTC, A shading coil type single phase synchronous / induction motor, characterized by having different resistance values. The method of claim 2, wherein the different resistance value, A shading coil type single phase synchronous / induction motor, comprising: a first NTC smaller than a resistance value of a second NTC; and the second NTC having a larger resistance value than the first NTC.

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