No contact energy-saving starter

A starter and non-contact technology, applied in the direction of motor generator/starter, single-phase induction motor starter, etc., can solve the problems of narrowing the scope of application, limitation of versatility, electromagnetic interference, etc., and achieve reliability Improve and reduce heating energy consumption, good starting effect

Inactive Publication Date: 2007-10-17
何敦启
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sampling part of the mutual-inductance non-contact starter is not really isolated from the trigger circuit of the bidirectional thyristor. The main coil of the motor or the main power supply circuit still has the influence of electromagnetic interference on the trigger circuit through the current transformer.
In addition, the mutual inductance non-contact starter cannot complete the starting

Method used

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Examples

Experimental program
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Embodiment Construction

[0019] Shown in the dotted line box in the figure is a DC isolation control type non-contact energy-saving starter. The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Referring to Fig. 1, the first embodiment of non-contact energy-saving starter, one electrode of PTC thermistor Rp and one output end (the 6th pin) of photoelectric coupler U are connected with AC power supply end A, PTC thermistor The other electrode of the device Rp is connected to the T2 pole of the triac T, and the other output terminal (pin 4) of the photocoupler U is connected to the G pole of the control terminal of the triac T. The T1 pole of the bidirectional thyristor T and one end of the run capacitor C2 are connected to the S end of the secondary coil L2 of the motor. One end of the inductor L, an AC input end of the rectifier bridge D, and the other end of the running capacitor C2 are connected to the M end of the main coil L1...

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PUM

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Abstract

The present invention relates to a contactless enegy-saving starter which is characterized in that: the device includes a PTC thermosensitive resistor Rp, a three-end bidirectional controllable silicon T, a photocoupler U, a sensor L and a rectifying bridge D. In the present invention, a photocoupler U is used to trigger the three-end bidirectional controllable silicon T, thus, the situation that the controllable silicon is not conducted and stopped absolutely because of the un-synchrony of the phase of the triggered control signal and the started loop is avoided, and the reliability is improved greatly. Thus, not only the successful stating of the electric motor is assured, and the started loop is broke absolutely because the bidirectional controllable silicon is stopped absolutely after the starting is achieved. The energy consumption by the thermosensitive resistor Rp is eliminated because there is no current flowing through the PTC thermosensitive resistor Rp.

Description

Technical field [0001] The invention relates to a starter, in particular to a non-contact energy-saving starter for a single-phase AC induction motor. Background technique [0002] A single-phase AC induction motor is generally composed of a stator and a rotor. The stator is composed of a main coil L1 and an auxiliary coil L2. The auxiliary coil L2 mainly works when the motor starts, and the main coil L1 works when the motor is running in a steady state. For any motor to run normally, it needs a good starting process. For the starting of a single-phase AC induction motor, it is necessary to connect a starter similar to a switch in series in the secondary coil circuit; it is required to be connected when the motor starts. The secondary coil L2 loop should be disconnected in time after the motor is started. A conventional motor starter is usually just a PTC thermistor with a positive temperature coefficient characteristic. If the power is turned on to the motor, a large curr...

Claims

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Application Information

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IPC IPC(8): H02P1/42
Inventor 何敦启陈浩明向玉安杨百昌
Owner 何敦启
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