JPH0727276U - Capacitor induction motor - Google Patents

Abstract

(57) [Abstract] [Object] Regarding a connection method of a stator winding of a capacitor induction motor, an object thereof is to provide a capacitor induction motor including a variable speed winding and enabling speed adjustment by switching the connection. . [Structure] In a serial phase connection type capacitor induction motor in which one end of an AC power supply 1, a main winding 2 and an auxiliary winding 3 are connected in series, and a capacitor 4 is connected in parallel with the main winding 2, for speed adjustment. The variable speed winding 5 is provided, the main winding 2 is superposed, and the tap 6, the tap 7, and the tap 8 are provided for each predetermined number of turns, and the variable speed winding 5 is connected between the AC power supply 1 and the main winding 2. It is characterized in that the connection between the other end and each tap can be switched by the change-over switch 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a capacitor induction motor, and more particularly to a stator winding connection method.

[0002]

[Prior art]

 Conventionally, as shown in Fig. 4, a stator winding connection method for a capacitor induction motor is one in which a main winding and an auxiliary winding are connected in series to an AC power source, and a capacitor is connected in parallel to the main winding. The serial phase connection method is adopted. In this serial phase connection method, a method based on primary voltage control for adjusting the voltage of an AC power supply is adopted as a speed changing means for speed adjustment, and an adjusting unit such as an AC voltage control circuit is separately required.

[0003]

[Problems to be solved by the device]

 The object of the present invention was made in view of the above-mentioned conventional problems, and speed adjustment is possible without requiring an adjusting unit such as an AC voltage control circuit based on primary voltage control as a speed changing means for speed adjustment. It is to provide a capacitor induction motor.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, in a series phase connection type capacitor induction motor, the main winding and the variable speed winding with taps for each predetermined number of turns are overlapped and the main winding and the AC power supply are connected. , Or a capacitor induction motor having means for connecting between the auxiliary winding and the AC power supply or between the main winding and the auxiliary winding and switching the tap with a changeover switch connected to the AC power supply or the main winding. Configured the stator winding connection method of.

[0005]

[Action]

 According to the above configuration, since the variable speed winding having the taps provided for each predetermined number of turns is superposed on the main winding and is switched by the changeover switch, the effective number of turns of the auxiliary winding is equal to that of the variable speed winding. Switching is possible as a combination of the number of turns and the number of turns of the auxiliary winding.

[0006]

【Example】

 An embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a circuit diagram showing a first embodiment of a connection method of stator windings of a capacitor induction motor according to the present invention. One end of an AC power supply 1 is connected to one end of an auxiliary winding 3, and the other end is connected in series. , One end of the main winding 2 is connected to the main winding 2, the main winding 2 and the capacitor 4 are connected in parallel, the variable speed winding 5 is lapped around the main winding 2, and tap 6, tap 7, tap 8 is provided, the other end of the main winding 2 and the variable speed winding 5 are connected in series, the changeover switch 9 is connected to each tap, and the common terminal of the changeover switch 9 is connected to the other end of the AC power supply 1. ing.

Next, the operation of this system will be described. When the tap 6 is connected to the changeover switch 9, the number of turns of the auxiliary winding 3 is constant, so that the rotational speed of the capacitor induction motor is constant. When the changeover switch 9 is switched to the tap 7, the number of turns between the taps 6 and 7 of the variable speed winding 5 is combined with the number of turns of the auxiliary winding 3, so that the impedance increases and the driving current decreases. The rotation speed is reduced. When the changeover switch 9 is changed over to the tap 8, the number of turns between the taps 6 and 7 and between 7 and 8 of the speed change winding 5 is combined with the number of turns of the auxiliary winding 3, so that the impedance further increases, The rotation speed is further reduced than that of the tap 7. In this way, the speed can be adjusted by switching the changeover switch 9 to tap 6, tap 7, and tap 8.

FIG. 2 is a circuit diagram showing a second embodiment of the connection method of the stator windings of the capacitor induction motor of the present invention. One end of the AC power supply 1 is connected to one end of the main winding 2, and the other is connected. One end of the auxiliary winding 3 is connected in series with the end, the main winding 2 and the capacitor 4 are connected in parallel, the variable speed winding 5 is wound around the main winding 2, and taps 6 and 6 are tapped at predetermined intervals. 7, a tap 8 is provided, the other end of the auxiliary winding 3 and the variable speed winding 5 are connected in series, a changeover switch 9 is connected to each tap, and the other end of the AC power source 1 has a common changeover switch 9. The terminals are connected. As a result, the speed can be adjusted, which is exactly the same as the description of the operation in FIG.

FIG. 3 is a circuit diagram showing a third embodiment of the connection method of the stator windings of the capacitor induction motor of the present invention. One end of the AC power supply 1 is connected to one end of the main winding 2, The other end of the power supply 1 and one end of the auxiliary winding 3 are connected, the main winding 2 and the capacitor 4 are connected in parallel, the variable speed winding 5 is wound around the main winding 2, and taps 6 are provided at predetermined intervals. The tap 7 and the tap 8 are provided, the other end of the main winding 2 and the variable speed winding 5 are connected in series, the changeover switch 9 is connected to each tap, and the changeover switch 9 is connected to the other end of the auxiliary winding 3. The common terminal of is connected. As a result, the speed can be adjusted, which is exactly the same as the description of the operation in FIG.

[0010]

[Effect of device]

 As described above, according to the present invention, in the serial phase connection type capacitor induction motor in which the main winding and the auxiliary winding are connected in series to the AC power source, and the capacitor is connected in parallel to the main winding, the variable speed winding is used. Since the wire is wound around the main winding, taps are provided for each predetermined number of turns, and the connection to each tap can be switched by a changeover switch, the stator winding connection method of the capacitor induction motor is configured. The speed can be adjusted without the need for an AC voltage control circuit based on the secondary voltage control, and it is realized at a lower cost than conventional speed change means.

[Brief description of drawings]

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

FIG. 2 is a circuit diagram showing a second embodiment of the stator winding connection method of the capacitor induction motor of the present invention.

FIG. 3 is a circuit diagram showing a third embodiment of the stator winding connection system of the capacitor induction motor of the present invention.

FIG. 4 is a circuit diagram showing a stator winding connection method of a conventional capacitor induction motor.

[Explanation of symbols]

 1 AC power supply 2 Main winding 3 Auxiliary winding 4 Capacitor 5 Speed change winding 6 Tap 7 Tap 8 Tap 9 Changeover switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yuuji Soma, 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General Co., Ltd. (72) Hiroyuki Okuji, 1116, Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General (72) Inventor Kenji Narita 1116 Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Limited

Claims (3)

[Scope of utility model registration request] 1. A capacitor induction motor of a series phase connection system, wherein a main winding and an auxiliary winding are connected in series to an AC power supply, and a capacitor is connected in parallel to the main winding. A variable speed winding with a tap provided for each number of turns was lapped and connected between the main winding and the AC power supply, and the switching speed was adjusted by a changeover switch that connected the tap to the AC power supply. Capacitor induction motor characterized by. 2. A capacitor induction motor of a series phase connection system, wherein a main winding and an auxiliary winding are connected in series to an AC power source, and a capacitor is connected in parallel to the main winding. A variable speed winding provided with a tap for each number of turns is wound in a lap, and is connected between the auxiliary winding and an AC power source, and the switching speed is adjusted by a changeover switch that connects the tap to an AC power source. Capacitor induction motor characterized by. 3. A series phase connection type capacitor induction motor comprising a main winding and an auxiliary winding connected in series to an AC power source, and a capacitor connected in parallel to the main winding. A variable speed winding with a tap provided for each number of turns was lapped and connected between the main winding and the auxiliary winding, and the switching speed was adjusted by a changeover switch connecting the tap to the auxiliary winding. A capacitor induction motor characterized in that