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Control method and circuit of single-phase motor

A single-phase motor and control method technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve problems such as unproposed solutions, fixed working torque range, limited motor utilization rate and application range, etc., to achieve increased Large torque output range, improved torque range, and reduced energy consumption

Active Publication Date: 2019-04-30
ZHUHAI LANDA COMPRESSOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the working torque range of the single-phase motor is fixed in the prior art, and the utilization rate and scope of application of the motor are limited, no effective solution has been proposed yet

Method used

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  • Control method and circuit of single-phase motor
  • Control method and circuit of single-phase motor
  • Control method and circuit of single-phase motor

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Embodiment 1

[0017] According to an embodiment of the present invention, a method embodiment of a control method for a single-phase motor is provided. It should be noted that the steps shown in the flow charts of the drawings can be executed in a computer system such as a set of computer-executable instructions , and, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0018] figure 2 is a flow chart of a control method for a single-phase motor according to an embodiment of the present invention, such as figure 2 As shown, the method includes the following steps:

[0019] Step S202, acquiring the to-be-output torque of the single-phase motor.

[0020] Specifically, the above torque to be output may be the torque that the single-phase motor needs to provide to the load, and the torque required by the load is different in different working environments.

[0021] Step...

Embodiment 2

[0050] According to an embodiment of the present invention, a product embodiment of a control circuit for a single-phase motor is also provided.

[0051] Figure 4 is a schematic diagram of a control circuit of a single-phase motor according to an embodiment of the present invention, such as Figure 4 As shown, the circuit includes:

[0052] A plurality of windings 41 are connected in parallel to both ends of the AC power supply 40 .

[0053] A plurality of control switches 43 , each control switch 43 is connected in series between the corresponding winding 41 and the AC power source 40 .

[0054] Optionally, in the above embodiments of the present invention, in the case that the preset multiple torque ranges of the single-phase motor include: the first torque range and the second torque range, the multiple windings include: the first winding and The second winding, wherein the first winding corresponds to the first torque range, the second winding corresponds to the second...

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Abstract

The invention discloses a control method and circuit of a single-phase motor. The method includes steps: obtaining a to-be-output torque of the single-phase motor; determining the torque range which the to-be-output torque belongs to from a plurality of torque ranges preset by the single-phase motor, wherein each torque range corresponds to a winding and a control switch; and controlling the switch-on of the corresponding control switch according to the torque range which the to-be-output torque belongs to so that the corresponding winding is regarded as the working winding of the single-phase motor. According to the control method and circuit, the technical problem that in the prior art, the working torque range of the single-phase motor is fixed, and the utilization rate and the application range of the motor are limited is solved.

Description

technical field [0001] The invention relates to the field of single-phase motors, in particular to a control method and circuit for a single-phase motor. Background technique [0002] Single-phase motor refers to a low-power single-phase asynchronous motor powered by a single-phase AC power supply (AC220V). Since the output power of a single-phase motor is not large, the rotor of a single-phase motor generally adopts a squirrel-cage rotor, and its stator has a set The working winding, called the main winding, can only generate positive and negative alternating pulse vibration magnetic fields in the air gap of the single-phase motor, but cannot generate a rotating magnetic field, so it cannot generate starting torque. In order to generate a rotating magnetic field in the air gap of the motor, a set of auxiliary windings is also required, which is called an auxiliary winding. Since the magnetic field generated by the auxiliary winding and the magnetic field of the main winding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P25/04
CPCH02P25/04
Inventor 张继胤范少稳
Owner ZHUHAI LANDA COMPRESSOR
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