Soybean milk machine controlling circuit capable of starting electric machine softly

Abstract

The invention relates to a soya bean milk maker circuit with motor soft start function, which comprises a motor, a silicon-controlled switch which is connected with the motor at an output end, a trigger circuit unit connected with a control end of the silicon-controlled switch, a single chip microcomputer connected with the trigger circuit unit, a zero-crossing detecting unit connected with the single chip microcomputer and a power and voltage detecting unit connected with the single chip microcomputer. An input end of the silicon-controlled switch is connected with one pole of a power, with the other pole of the power being connected with the motor at one end that is not connected with the silicon-controlled switch; the power and voltage detecting unit is connected with two poles of the power; the single chip microcomputer is connected with the power through a power step-down circuit unit. The soya bean milk maker circuit with motor soft start function of the invention controls the motor under the condition that the trigger circuit unit controls the silicon-controlled switch, thereby realizing soft start, and when the motor is started, shock impact of the motor on electric network is reduced and sudden noise caused by starting the motor becomes stable, thus reducing acoustical irritation to human body; in addition, the motor is provided with various voltage for regulating rev of the motor, thereby meeting requirements for different crushing degrees determined by bean materials and users, reducing the noise of the motor, prolonging the service life of the motor and increasing discharging rate.

Description

technical field [0001] The invention relates to a soybean milk machine control circuit, in particular to a soybean milk machine control circuit with a motor soft start function. Background technique [0002] The pulverizing motor of the existing soybean milk machine is controlled by a relay. When the motor is started, it has a large impact on the power grid, and at the same time, the sudden burst of noise is very loud, which frightens the hearing of the human body, especially for children and pets. In addition, the applicability of the motor to the grid voltage is also very poor. The higher the voltage, the greater the output power of the motor, and the noise of the motor will also increase, which will affect the life of the motor. At the same time, the mechanical and electrical life of the relay is also limited. [0003] Therefore, it is necessary to improve the motor control circuit of the existing soybean milk machine. Contents of the invention [0004] Therefore the ...

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Problems solved by technology

[0002] The crushing motor of the existing soybean milk machine is controlled by a relay. When the motor is started, it will have a large impact on the power grid, and at the same time, the sudden burst of noise will be very loud, which will frighten the human hearing, especially for children and pets.

In addition, the applicability of the motor to the grid voltage is also very poor. The higher the voltage, the greater the output power of the motor, and the noise of the motor will also increase, which will affect the life of the motor. At the same time, the mechanical and electrical life of the relay is also limited

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