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Food processor

A technology for food processing machines and hosts, which is applied to milk substitutes, dairy products, and program control in sequence/logic controllers, etc., can solve the problems of uneven motor speed, large motor dynamic load, and large motor impact, and achieve safety. Improved reliability, improved motor life, and reduced electromagnetic noise

Active Publication Date: 2010-05-26
FOSHAN JINXINGHUI ELECTRICAL APPLIANCE
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AI Technical Summary

Problems solved by technology

In the above two schemes, the switching components used are silicon controlled rectifiers, and the speed is adjusted by the principle of silicon controlled rectifiers, so that the motor speed is uneven, the dynamic load of the motor is large, the impact of the motor is large, and the electromagnetic noise is large, and the efficiency of the motor is low, and the loss Severe heat generation, high temperature, fragile motor, poor reliability

Method used

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Embodiment Construction

[0018] see figure 1 and figure 2 , a food processing machine provided in the present invention includes a host, an AC series motor installed in the host, a cutter driven by the motor, a heating component and a control circuit, and the control circuit is provided with a regulating The speed control circuit includes a rectifier circuit 1, a strong and weak current isolation device 4, a power switch tube IGBT5, a freewheel tube 6 and a CPU. Described CPU adopts single-chip microcomputer. The rectifier circuit 1 provides DC control power to the power switch tube IGBT5, the strong and weak current isolation device 4 is connected to the control terminal G of the power switch tube IGBT, and the variable frequency or variable pulse width pulse generated by the CPU The control signal is input into the strong and weak current isolation device 4 to control the operation of the strong and weak current isolation device 4, thereby triggering the conduction of the power switch tube IGBT, ...

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Abstract

A food processor comprises a principal machine, an alternating current series motor, a cutter, a heating component and a control circuit. A speed regulating circuit is arranged in the control circuit and comprises a rectifying circuit, a strong-weak current barrier device, a power switch tube, a continuous current tube and a CPU. The rectifying circuit provides direct current control power supply to the power switch tube. The strong-weak current barrier device is connected with the control end of the power switch tube. The pulse control signal generated by the CPU is input into the strong-weak current barrier device to control the strong-weak current barrier device to work, thereby triggering the power switch tube to be conducted. The power switch tube is accessed to a power supply circuit of the motor to ensure the pulse control signal generated by the CPU to regulate the speed of the motor. The continuous current tube is connected with the motor to form a continuous current circuit, thereby ensuring an inductive energy storage in the motor to discharge to keep the motor remaining in operation. The invention adopts the AC-DC dual-purpose series motor and adopts the power switch tube to control frequency conversion and pulse width conversion to regulate the speed, and the motor is smooth and stable in speed, low in electromagnetic noise, little iron loss and high efficiency.

Description

technical field [0001] The invention relates to a food processing machine, in particular to a food processing machine with a speed regulation control circuit. Background technique [0002] The series motor can be applied to AC and DC power sources, and has large starting torque and high speed, especially in the DC drive mode, the speed is higher. This type of motor can well meet the needs of soybean milk machines. In order to realize the speed regulation control of the series excitation motor in the soybean milk machine, a speed regulation circuit for the motor control of the soybean milk machine appears in the prior art. For example, the Chinese patent number is CN200820043323.9 invention patent, and the announcement date is November 12, 2008. It discloses a stepless speed regulation soymilk machine, including a machine head and a milk container. A motor is installed on the machine head, and the motor passes through the The single-chip microcomputer intelligent control ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47J31/44A23C11/10G05B19/04
Inventor 蔡镜波
Owner FOSHAN JINXINGHUI ELECTRICAL APPLIANCE