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Method for soy bean milk making machine soft starting and soft closing and control circuit for implementing the method

A motor control and motor technology, applied in starter parts, food preparation, food science, etc., can solve the problems of unstable motor speed, reduced motor service life, large starting current, etc., to improve operation stability, extend Service life, effect of reducing impact torque

Inactive Publication Date: 2009-07-08
KINGCLEAN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the motors of soybean milk machines on the market basically reach half power or maximum power instantly when starting, and stop immediately when the motor is stopped. There is a lot of recoil and so is the motor, instant starts and stops can affect the functionality and longevity of the motor
The reason for the above-mentioned situation of the soybean milk machine motor is that the current control circuit of the soybean milk machine motor uses a relay to drive and control the motor; Reduced motor life
Moreover, when the motor is started and shut down, due to the large voltage change, the speed of the motor is not stable, and the impact torque on the load machinery causes the soymilk machine to vibrate severely, greatly reducing the operation stability of the soymilk machine

Method used

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  • Method for soy bean milk making machine soft starting and soft closing and control circuit for implementing the method
  • Method for soy bean milk making machine soft starting and soft closing and control circuit for implementing the method

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Embodiment

[0017] Embodiment: The present invention provides a method for soft start and soft shutdown of the soybean milk machine motor. In this method, the thyristor TR2 is used as a voltage regulator to connect between the power supply and the motor M1, and in the alternating current with a period of T, The detection of the AC zero-crossing signal is used as a synchronous signal, and the conduction angle of the thyristor TR2 is changed through a phase-shift trigger method, so that a continuously changing voltage is obtained on the motor M1.

[0018] Simultaneously the present invention also provides a kind of control circuit that realizes above-mentioned method, present embodiment combines figure 1 As shown, the composition of this control circuit and the process of realizing soft start and soft shutdown of the motor are described in detail as follows: The motor control circuit of this soybean milk machine adopts a thyristor phase-shift trigger circuit, which is specifically composed o...

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PUM

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Abstract

The invention discloses a motor soft-starting method of a soymilk machine. Controlled silicon is used as a booster that is connected between a power supply and an electric motor; in AC with T period, an AC zero-crossing signal is detected and taken as a sync signal, the conduction angle magnitude is changed in a phase-shift trigger manner, so that the electric motor obtains voltage that varies continuously. The motor soft-starting method really realizes the soft-starting and soft turning-off of the electric motor in the soymilk machine, reduces the impact of sudden increase and sudden decrease of the voltage on the electric motor and a power grid, leads the rotation speed of the electric motor in the soymilk machine to change smoothly when starting or turning off, reduces the impact torque of the electric motor on loaded machinery, increases the operating stability of the soymilk machine, and prolongs the service life of the electric motor.

Description

technical field [0001] The invention relates to a method for soft starting and soft closing of a soybean milk machine motor and a control circuit for realizing the method. Background technique [0002] At present, the motors of soybean milk machines on the market basically reach half power or maximum power instantly when starting, and stop immediately when the motor is stopped. There is a lot of recoil, and so does the motor, and instant starts and stops can affect the functionality and longevity of the motor. The reason for the above-mentioned situation of the soybean milk machine motor is that the current control circuit of the soybean milk machine motor uses a relay to drive and control the motor; reduce the service life of the motor. Moreover, when the motor is started and shut down, due to the large voltage change, the speed of the motor is not stable, and the impact torque on the load machinery causes the soymilk machine to vibrate severely, greatly reducing the oper...

Claims

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Application Information

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IPC IPC(8): H02P1/04A23L1/20
Inventor 倪祖根
Owner KINGCLEAN ELECTRIC
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