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Single-phase motor centrifugal switch tester

A centrifugal switch, single-phase motor technology, applied in the direction of motor generator testing, circuit breaker testing, etc., can solve the problem of inability to detect the starting speed of the centrifugal switch

Active Publication Date: 2012-05-30
慈溪威力电机制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the existing single-phase motor tester cannot detect the starting speed when the centrifugal switch is disconnected, the present invention provides a single-phase motor centrifugal switch tester that can effectively detect the starting speed when the centrifugal switch is disconnected

Method used

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the drawings.

[0018] Reference Figure 1 ~ Figure 2 , A single-phase motor centrifugal switch tester, including a housing, a detection circuit, an external power interface, a centrifugal switch plug-in point, and a rotation speed display. The external power interface, the centrifugal switch plug-in point and the rotation speed display are all located on the surface of the housing. The detection circuit is located in the housing, the detection circuit includes a step-down transformer, a rectifier circuit, a switch detection relay, a frequency converter, a frequency conversion motor, a speed sensor, and a controlled sub-circuit. The external power interface is connected to a step-down transformer and a frequency converter at the same time , A speed indicator and a controlled sub-circuit, the low-voltage output end of the step-down voltage regulator is connected with the input end of the finishing cir...

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Abstract

The invention relates to a single-phase motor centrifugal switch tester which comprises an outer casing, a detecting circuit, an exterior power supply interface, a centrifugal switch inserting point and a rotation speed display, wherein the exterior power supply interface is simultaneously connected with a reducing transformer, a converter, the rotation speed display and a controlled sub circuit.The low-voltage output end of the reducing transformer is connected with the input end of a sorting circuit, the output end of the sorting circuit is connected with the centrifugal switch, and the centrifugal switch is connected in series with a switch detecting relay. The converter is connected with a variable-frequency motor through a motor starting switch. The variable-frequency motor is provided with a speed-testing sensor, and the speed-testing sensor is connected with the rotation speed display. The controlled sub circuit comprises a switch detecting normally open contact, a control push button and a motor starting relay which are sequentially connected in series. The switch detecting normally open contact is linked with the switch detecting relay, and the motor starting switch is linked with the motor starting relay. The invention can effectively detect the starting rotation speed of the centrifugal switch when in disconnection.

Description

Technical field [0001] The invention relates to a single-phase motor tester. Background technique [0002] In the field of motor production, the performance and production technology of single-phase motors are improving and progressing, especially foreign customers have higher and higher performance requirements for single-phase motors. There are many differences from traditional domestic single-phase motors, such as The domestic power supply voltage is 220V / 380V and the frequency is 50HZ. In foreign countries, there are multiple voltages with 110V / 230V / 460V / 575V, and the frequency is 60HZ. And it is a high-power single-phase motor (maximum 7.5KW), multi-voltage, with temperature protector, with overcurrent protector, etc. Because the voltage and frequency are different from the domestic ones, especially for the centrifugal switch and the centrifugal switch board of the high-power single-phase motor, the starting speed of the centrifuge is too low, which affects the starting tor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327G01R31/34
Inventor 徐如根鲁涵
Owner 慈溪威力电机制造有限公司
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