Single-phase AC motor starting method

A single-phase AC motor and starting method technology, which is applied to the starter of a single single-phase induction motor, motor generator/starter, etc., can solve the problems of affecting the service life of the motor, potential safety hazards of the motor, and high production costs, and achieve extension Long service life, improved reliability, and large starting torque

Inactive Publication Date: 2006-05-03
QINGDAO D& D ELECTRO MECHANICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The starting method of the traditional single-phase AC motor generally uses a centrifugal switch cut-end starting element, its structure is complex, and the centrifugal switch is expensive, so the production cost is high
Moreover, the reliability is poor, which brings hidden dangers to the safety of the motor.
In addition, it will inevitably affect the service life of the motor

Method used

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  • Single-phase AC motor starting method
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Examples

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Embodiment 1

[0020] Example 1. A starting method for a single-phase AC motor, the designed circuit is shown in Figure 1. The method connects a circuit together with the winding circuit (1) of the motor to the single-phase AC mains in parallel, comprising the following steps:

[0021] (1) Design a resistor-capacitor parallel circuit (2) connected to one end A of the AC mains power to step down the AC mains power;

[0022] (2) Install a rectifier circuit (3) between the output terminal of the resistor-capacitor parallel circuit (2) and the other end B of the AC mains to rectify the AC to DC;

[0023] (3) A filter capacitor (4) is connected in parallel at the output end of the rectification circuit (3) to make the DC output more stable;

[0024] (4) On the filter capacitor (4), the voltage stabilizing circuit connected in parallel by the resistor (5) and the voltage regulator tube (6) is connected in series to stabilize the voltage;

[0025] (5) connect the series circuit of the coil of la...

Embodiment 2

[0028] Example 2. A method for starting a single-phase AC motor, such as figure 2 shown. In the method, a circuit and the winding circuit (1) of the motor are connected in parallel to the single-phase AC commercial power. A normally open contact of its relay (9) and the starting element are connected in the winding circuit (1) of the motor.

[0029] Embodiments 1 and 2 avoid using a centrifugal switch, the circuit is simple, the production cost can be significantly reduced, and the reliability can be improved. It can greatly improve the starting performance and effectively prolong the service life of the motor. Its production cost can be reduced to about one-third of the past. It can be widely used in the starting of single-phase AC motors.

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Abstract

The invention relates to an operating method of a single-phase ac motor in the field of motor technology. The method connects a circuit and a coil group circuit of the motor on the single-phase ac commercial power, which comprises: designing a resistance capacity parallel circuit connected with one end of the ac commercial power, adding a rectifying circuit on the output end of the resistance capacity parallel circuit and the other end of the ac commercial power, paralleling a filter capacity on the output end of the rectifying circuit, paralleling a voltage regulating circuit which is formed by resistance and voltage regulating pipe on the filter capacity, paralleling a large capacity and a series circuit of the relay coil on the output end of the voltage regulating pipe, connecting an open contact and a start unit of the relay on the coil group circuit of the motor.

Description

technical field [0001] The invention belongs to the technical field of single-phase motors, and more specifically relates to the improvement of the starting method of single-phase AC motors. Background technique [0002] The starting method of the traditional single-phase AC motor generally uses a centrifugal switch cut-end starting element, its structure is complex, and the centrifugal switch is expensive, so the production cost is relatively high. Moreover, the reliability is poor, which brings hidden dangers to the safety of the motor. In addition, it will inevitably affect the service life of the motor. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned shortcomings and deficiencies, and to provide a starting method for a single-phase AC motor. It does not use a centrifugal switch, has a simple structure and circuit, can significantly reduce production costs and improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/42
Inventor 张永升任东良任淑梅
Owner QINGDAO D& D ELECTRO MECHANICAL TECH
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