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Starting device for single-phase induction motor

A technology for induction motors and starting devices, which is applied to the starters of single-phase induction motors, asynchronous induction motors, motor generators/starters, etc., and can solve problems such as difficult storage, poor space efficiency, and easy deformation, and achieve The effect of high connection reliability

Inactive Publication Date: 2006-01-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In addition, in the barrel-shaped receptacle terminal of JP-A-8-149770, there is a problem that the arc-shaped part divided by the groove concentrates stress on a part due to the rib arch effect, and there is a problem that it is easy to deform.
On the other hand, in the receptacle terminal provided with the engaging piece portion of Japanese Patent Laid-Open No. 8-149770, the engaging piece portion protrudes to the side, so the space efficiency is deteriorated and it is difficult to be accommodated in the starter device.
In the socket terminal of JP-A-2001-332159, since the convex part is provided separately from the socket terminal, there is a problem that the space efficiency becomes poor and it is difficult to be accommodated in the starter device.

Method used

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  • Starting device for single-phase induction motor
  • Starting device for single-phase induction motor
  • Starting device for single-phase induction motor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0118] Next, a starter device and an overload protector according to a first embodiment of the present invention will be described with reference to the drawings.

[0119] Such as figure 1 As shown in (A), the starter 10 and the overload protector 50 of the first embodiment are integrally attached to the pin terminal 110 of the dome 104 of the compressor 102 and protected by the cover 106 . The motor 100 is housed inside the compressor 102 .

[0120] figure 2 It is a circuit diagram of the starter of the single-phase induction motor and the overload protector 50 which concerns on 1st Embodiment. The power supply terminals 92 and 94 are connected to the 100V single-phase AC power supply 90. In addition, one of the power supply terminals 92 is connected to the power line 96 through the series operation switch 97 and the overload protector 50, and the other power terminal 94 is connected to the power line 98. superior. The overload protector 50 is composed of a bimetal 70 a...

no. 2 approach

[0178] refer to Figure 12 The snap bimetal 18 of the starter device of the second embodiment will be described.

[0179] Figure 12 (A) is a plan view of the snap bimetal 18 of the starting device of the second embodiment, Figure 12 (B) is a side view, Figure 12 (C) is a plan view of the snap bimetal 18 of the starter device of another example of the second embodiment, Figure 12 (D) is a side view of another example, Figure 12 (E) is explanatory drawing of the ON state of the snap bimetal 18 of 2nd Embodiment. Figure 12 (F) is an explanatory diagram of an off state.

[0180] Such as Figure 12 As shown in (A), the snap-action bimetal 18 is provided with a long hole near the center of the flat bimetal, and the central part 18h sandwiched by the long hole is not processed, and the two sides of the long hole are respectively processed. Add 18g to the deep drawing in two places. Figure 12 (C), Figure 12 (D) is another example in which 18 g of deep drawing processi...

no. 3 approach

[0191] refer to Figure 14 The bimetal 18 of the starter device of the third embodiment will be described.

[0192] Figure 14 (A) is an explanatory diagram of the ON state of the bimetal 18 of the third embodiment, Figure 14 (B) is an explanatory diagram of the disconnected state of the bimetal 18 .

[0193] In the bimetal 18 of the third embodiment, as in the first and second embodiments, the auxiliary PTC is disposed on the base, and the movable contact 18a is provided on the free end side. Furthermore, a magnet 23A that pushes the movable contact 18 a toward the fixed contact 36 a side is applied to the bimetal 18 , and is installed near the bimetal 18 . Other structures and references Figure 1 to Figure 9 The above-mentioned first embodiment is the same, so the description thereof will be omitted.

[0194] In the starter device of the third embodiment, the bimetal 18 provided with the movable contact 18a on the free end side is pushed to the contact-connection side...

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Abstract

When a starting current runs through an auxiliary winding (S), a main PTC (12) and an auxiliary PTC (14) undergo self-heating for an increased electric resistance. When the auxiliary PTC (14) is heated to 140 DEG C, a snap-action bimetal (18) is turned off to stop a current flow to the main PTC (12) and completes the starting of a single-phase induction motor (70). With the bimetal (18) off, a feeble current runs through the auxiliary PTC (14) side only to keep the bimetal (18) off by heat generated by the current.

Description

technical field [0001] The present invention relates to a starting device for single-phase induction motors such as compression motors (hermetic electric compressors) for refrigerators and pump motors. Background technique [0002] Generally, a starter device is often provided in a single-phase induction motor that drives a hermetic compressor such as a refrigerator or an air conditioner. As an existing starting device of this kind, such as Figure 27 As shown in (A), there is provided a structure in which a positive characteristic thermistor 312 is connected in series to the auxiliary winding S powered by the AC power supply 90 together with the main winding M. In such a starting device, when the single-phase induction motor 100 is started, the positive characteristic thermistor 312 has a low resistance value, so that a starting current flows through the auxiliary winding S. By the starting current, the positive characteristic thermistor 312 becomes high resistance, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/42H02K17/08H01H37/54H02K11/00
Inventor 佐桥干夫松家显彦岩崎真一冈田基伊藤一夫
Owner PANASONIC CORP