JP2947396B2 - Capacitor induction motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor induction motor, and more particularly, to a method of connecting stator windings.

[0002]

2. Description of the Related Art Conventionally, a main winding 2 and an auxiliary winding 3 are connected to an AC power supply 1 as a method of connecting stator windings of a capacitor induction motor.
Are connected in parallel, and a capacitor 4 is connected in series to the auxiliary winding. In this parallel phase connection system, as a speed change means for speed adjustment, one end of the speed reduction winding 5 provided with several taps from the middle as shown in FIG. The fourth tap of the speed reduction winding 5 is connected to several connection switches 8, 9, 10 connected to a connection point with one end and connected to one end of the AC power supply 1.
5e, fifth tap 5f, sixth tap 5g, seventh tap 5
The method of switching h is adopted. However,
According to this method, for example, when the number of switching stages is four, four taps of the deceleration winding, four leads from the winding from the tap position, one from the one end of the main winding, and A total of six switches, one from one end, require three single-pole double-throw changeover switches. As the number of speed switching stages increases, the number of taps of the reduction winding also increases. The number of leads from the train was large, and there were difficulties in workability and economy.

[0003]

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above-mentioned conventional problems, and has four stages of speed adjustment, the number of changeover switches, the tap position from the speed reduction winding, and the speed of the winding. The object of the present invention is to provide a capacitor induction motor excellent in workability and economy by reducing the number of lead wires.

[0004]

In order to achieve the above object, one end of an AC power supply is connected to one end of a main winding and one end of a capacitor, and the other end of the capacitor is connected to one end of an auxiliary winding. one end of the deceleration winding for pacing was connected to the other end of the main winding, the first tap from the connection point, pull the second tap, third tap from the other end of the deceleration winding, fourth tap the drawer is connected to the switching terminal of the first tap, a first changeover switch which connects the third tap to the other end of the AC power source, the
The two taps and the fourth tap are connected to the switching terminal of a second switch connected to the other end of the auxiliary winding, and the tap is switched by the first switch and the second switch to adjust the speed in four stages. The connection system of the stator windings of the capacitor induction motor is constructed.

[0005]

According to the above arrangement, one end of the main winding and one end of the capacitor are connected to one end of the AC power supply, and one end of the auxiliary winding is connected to the other end of the capacitor. one end of the line connected to the other end of the main winding, a first capacitor from the connection point
From the other end of the deceleration winding
Third tap, pull out the fourth tap, the first tap, the first
Three taps are connected to the switching terminal of the first changeover switch connected to the other end of the AC power supply, and second and fourth taps are connected to the changeover terminal of the second changeover switch connected to the other end of the auxiliary winding. Since the taps are switched by the changeover switch, the effective number of turns of the main winding by the first changeover switch is only the number of turns of the main winding or a combination of the number of turns of the main winding and the number of turns of the reduction winding. Similarly, the effective number of turns of the auxiliary winding by the second changeover switch can be changed to two types only by the number of turns of the auxiliary winding or the combination of the number of turns of the auxiliary winding and the number of turns of the deceleration winding. Switching becomes possible. As a result, four types of effective combinations of the number of turns of the main winding and the number of turns of the auxiliary winding are generated, and the speed can be adjusted to four stages.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a circuit diagram showing one embodiment of a method of connecting stator windings of a capacitor induction motor according to the present invention. 1
Is an AC power supply. One end of the AC power supply is connected to one end of the main winding 2 and one end of the capacitor 4, and the other end of the capacitor 4 is connected to one end of the auxiliary winding 3 in series. Next, a speed reduction winding 5 for adjusting the speed is connected in series to the other end of the main winding 2, and from the connection point
Pull out the first tap and the second tap, and pull out the third tap and the fourth tap from the other end of the speed reduction winding. On the other hand, a first switch 6 is connected to the other end of the AC power supply 1, and a second switch 7 is connected to the other end of the auxiliary winding 3. Furthermore,
The first tap and the third tap are connected to the switching terminal of the first changeover switch 6, and the second tap and the fourth tap are connected to the changeover terminal of the second changeover switch 7. According to the stator winding connection method configured as described above, the first changeover switch 6 and the second changeover switch 7 are used to perform four-stage speed adjustment by switching tap positions. Here, a single-pole double-throw switch is used as the changeover switch.

Next, the operation of this system will be described. The switching terminal of the first switch is connected to one of the first tap and the third tap , and the switching terminal of the second switch is connected to the second tap .
By being connected to either the tap or the fourth tap, the following four connection states (1), (2), (3), and (4) occur.

(1) Connection state When the switching terminal of the first switch is connected to the third tap and the switching terminal of the second switch is connected to the fourth tap , the effective main winding The number of turns of the wire is a combination of the number of turns of the main winding and the number of turns of the reduction winding, and the effective number of turns of the auxiliary winding is the number of turns of the auxiliary winding. (2) Connection state When the switching terminal of the first switch is connected to the third tap and the switching terminal of the second switch is connected to the second tap , the effective number of turns of the main winding Is the combination of the number of turns of the main winding and the number of turns of the deceleration winding, and the effective number of turns of the auxiliary winding is the combination of the number of turns of the auxiliary winding and the number of turns of the reduction winding. (3) Connection state When the switching terminal of the first switch is connected to the first tap and the switching terminal of the second switch is connected to the fourth tap , the effective number of turns of the main winding Is the number of turns of the main winding, and the effective number of turns of the auxiliary winding is a combination of the number of turns of the auxiliary winding and the number of turns of the reduction winding. (4) Connection state When the switching terminal of the first switch is connected to the first tap and the switching terminal of the second switch is connected to the second tap , the effective number of turns of the main winding Is the number of turns of the main winding, and the effective number of turns of the auxiliary winding is the number of turns of the auxiliary winding.

Here, the rotational speeds in the four connection states are compared. In the connection state (4), since the effective number of turns of the main winding and the auxiliary winding is constant, the rotation speed of the capacitor induction motor is constant. In the connection state (3), the number of turns of the deceleration winding is combined with the number of turns of the auxiliary winding, so that the effective impedance of the auxiliary winding increases, and the driving current of the auxiliary winding is increased due to the series resonance circuit with the capacitor. Increases, and the rotation speed is accelerated as compared with the case (4). (2)
In the connection state, the number of turns of the deceleration winding is combined with the number of turns of the main winding, so that the effective impedance of the main winding increases.
Since the driving current of the main winding decreases, the rotation speed becomes (3),
Although the speed is reduced more than in the case of (4), on the other hand, the effective number of turns of the deceleration winding is combined with the number of turns of the auxiliary winding, so that the effective impedance of the auxiliary winding increases, and a series resonance circuit with a capacitor is used. The drive current of the auxiliary winding increases, and the rotation speed is accelerated as compared with the case (1). In the connection state (1), the number of turns of the deceleration winding is combined with the number of turns of the main winding, so that the effective impedance of the main winding further increases, and the driving current of the main winding decreases. Is reduced more than in the cases (3) and (4), but the drive current of the auxiliary winding does not increase, so that the speed is further reduced as compared with the case (2). As a result, the order of higher rotation speeds is (3), (4), (2),
(1). A first changeover switch in this way the
One tap, the third tap, the second change-over switch the second touch
By switching to the fourth tap and the fourth tap , four types of speed adjustment can be performed.

[0010]

As described above, in the present invention, one end of the main winding and one end of the capacitor are connected to one end of the AC power supply,
Attach one end of the auxiliary winding to the other end of the capacitor, one end of the deceleration winding for pacing was connected to the other end of the main winding, the first tap from the <br/> connection point, the second Pull out the tap , pull out the third tap, the fourth tap from the other end of the deceleration winding,
The first tap, the third tap is connected to the switching terminal of the first changeover switch connected to the other end of the AC power supply, the second tap,
A fourth tap connected to a switching terminal of a second changeover switch connected to the other end of the auxiliary winding, and a stator winding provided with a means for changing taps by the first changeover switch and the second changeover switch; Since the connection method is configured, four types of effective combinations of the number of windings of the main winding and the number of windings of the auxiliary winding are generated, and the speed can be adjusted to four stages. Since the number of changeover switches and the number of lead wires from the windings are also reduced from six to five, shortening the winding process and reducing the cost of parts materials are excellent in workability and economy, so conventional shifting is possible. It can be realized at low cost compared to the means, and improvement in reliability can be expected due to the reduction of parts.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing one embodiment of a stator winding connection system of a capacitor induction motor of the present invention.

FIG. 2 is a circuit diagram showing a stator winding connection method of a conventional capacitor induction motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC power supply 2 Main winding 3 Auxiliary winding 4 Capacitor 5 Reduction winding 6 First changeover switch 7 Second changeover switch

Claims (1)

(57) [Claims] An AC power supply has one end connected to one end of a main winding and one end of a capacitor, the other end of the capacitor connected to one end of an auxiliary winding, and one end of a deceleration winding for speed adjustment. Connect to the other end of the winding, and from the same connection point tap 1 and tap 2.
Pull out the third tap from the other end of the deceleration winding ,
Pull out the four taps , connect the first tap and the third tap to the switching terminal of the first changeover switch connected to the other end of the AC power supply, and connect the second tap and the fourth tap to the other end of the auxiliary winding A capacitor induction motor connected to the switching terminal of the second changeover switch, and performing four-stage speed adjustment by switching taps by the first changeover switch and the second changeover switch.