JPS61285096A - Switching system for motor windings - Google Patents

Abstract

PURPOSE:To manufacture a small-sized and inexpensive motor by dividing a high voltage winding into two low voltage windings and a terminal number voltage windings, connecting the windings in series or in parallel by a changeover switch, and energizing it with high or low voltage. CONSTITUTION:Two windings for low voltage of 100V and one winding for terminal number voltage of 20V are wound as low voltage windings N1, N2 and a terminal number voltage winding N3 as three sections, and the ends of the windings are connected by a dipole changeover switch K. When the switch K is shifted to terminals 1, 2 side, it becomes a low voltage side, the windings N1, N2 are connected in parallel to become a low voltage (100V) winding. When the switch K is shifted to terminals 3, 4 side, it becomes a high voltage side, the windings N1, N2 and N3 are connected in series to become a high voltage winding.

Description

DETAILED DESCRIPTION OF THE INVENTION Household electrical appliances are created depending on the input power supply voltage. For example, for 50Hz, 100V or 50Hz, 22
When using different voltages such as for OV, a voltage matching transformer is used. However, it is not desirable to use a voltage matching transformer in combination with a small and inexpensive device because it increases the cost.

The present invention enables a predetermined voltage to be set by a changeover switch to either one of the above voltages without using a voltage matching transformer, even for AC 100V (hereinafter referred to as 1 voltage) or 220V (hereinafter referred to as high voltage), for example. The technical background of the present invention is as follows.

Generally, the multiple inputs (power) of an electric motor are determined by the output (load). If input power W, voltage V, and electric current are given, W=
V I cosψ where COSψ is the power factor.

Now, when the low voltage is 100v and the high voltage is 220v, cosψ=
The case where 0.8W=30W is illustrated.

Current angle 1° when the voltage is 100V. =0.375AM
It is P. Furthermore, there is an impedance Z100.

When the high voltage is 220v, current and impedance f I220 + 2220, I220 = 0.1704 AMP, Z2
20 = 1291Ω.

Therefore, the current ratio and impedance ratio when the voltage is 100v and 220v are as follows.

That is, when the voltage increases by 2.2 times, the current becomes 1/2.2. According to the above theory, when the cross-sectional area of the winding is 100V, the stain flow density can be kept the same by making it 2.2 times larger than that at 220V. Note that the number of windings is roughly proportional to the voltage, and the impedance is proportional to the square of the winding, so the relationship between the number of windings, cross-sectional area, and impedance is as follows.

The configuration is explained in the drawing.

2 for low voltage 100V as an AC power source as shown in Figure 1.
and one winding for fractional voltage 2OV, namely the low voltage winding N1. N2 and fractional voltage winding N3 are divided into three parts and wound, and the ends of each winding are connected to a two-pole changeover switch K. e is an AC power supply, and a low voltage of 10QV or a high voltage of 220V is selectively supplied. When the switch K is turned to the terminals 1 and 2 side, low voltage is applied, and when it is turned to the terminals 3 and 4 side, high voltage is applied. If the windings Nl and N2 are connected in parallel, the number of turns will be for low voltage (100V), and the cross-sectional area of the winding will be twice that of the high voltage (220V) winding. Also, if you turn the switch to the terminals 3 and 4, it will become the high voltage (220V) side, and as shown in Figure 3, the windings Nl (for 100V) and N
2 (for 100V) and N5 (fractional voltage of 20V) are connected in series to form a winding for high voltage (220V).

As described above, in the present invention, the 220V winding is connected to the 220V winding for high voltage in the - motors at 100V, Zo.

Low voltage (100V) or high voltage (220V) can be achieved by applying windings divided into V and 20V and switching to a switch.
) As a result of having motor winding #J that is compatible with only one of the AC power supply voltages, the space factor of the windings can be used effectively even when the power supply is 100V or 220V, resulting in the effect of operating as an efficient motor. . On the other hand, when a 100V winding and a 220V winding are provided separately as in the past and the windings are used individually, one of the windings is always unused, and as a result, By providing a switching method that can prevent the space 7 actors in the idle state from being reduced by half, there is an advantage that a small and inexpensive electric motor can be manufactured.

[Brief explanation of drawings]

Figure 1 is a wiring diagram showing the main parts of the electric equipment winding when the supplied AC power is 100V or 220V, Figure 2 is a wiring diagram when the above AC power is 100V, and Figure 3 is a wiring diagram when the AC power is 100V or 220V. Wiring diagram for 220V, N1 to N3... windings, 1 to 4...
・Terminal, K...Indicates a switch. Compilation (day 00v $2 day procedural amendment (voluntary) September 6, 1985 Michibe Uga, Commissioner of the Patent Office 1, Indication of the case Patent application 1988-122535 2, Name of the invention Switching of motor windings Form 3, Relationship with the case of the person making the amendment Patent applicant address: 2-13-9-4, Nakamachi, Ageo City, Saitama Prefecture, Date of amendment order (voluntary) 5, Specification subject to amendment/!>riV'1・2・−・、

Claims (1)

[Claims] Divide the high voltage winding into two low voltage windings and a fractional voltage winding, attach them to the motor, connect the above windings in series or in parallel using a changeover switch, and energize them to high or low voltage. A motor winding switching system with a circuit like this.