Electric control device for modularization high-power electromagnetic range and control method

Abstract

The invention relates to a modularized high-power induction cooker electric controlling device and a controlling method. The electric controlling device mainly comprises a power conversion module, two independent power modules with consistent parameters, a main control module, etc. The control structure of the set of device adopts the modular design; if a part of power module is removed, a set ofindependent and complete induction cooker electric controlling device can be formed; higher power output can be obtained simply by increasing the power module. Because being designed by adopting a modularized structure, the electric controlling device can be assembled conveniently by a user; therefore, the power enlargement upgrade is also very convenient. In addition, a hardware dead zone controlling circuit and a safety protection controlling circuit are adopted in the system, thereby enhancing the working safety and the stability of the induction cooker; an intelligent self-adapting constant power controlling strategy, an intelligent soft start controlling strategy and the fault detection technology are adopted in the controlling method, thereby enhancing the working stability and the safety of the induction cooker.

Description

technical field [0001] The invention relates to an electromagnetic cooker, in particular to a high-power electromagnetic cooker, in particular to a modular high-power electromagnetic cooker electric control device and a control method with high efficiency, energy saving, cleanness and environmental protection, strong safety and high reliability. Background technique [0002] Induction cooker is currently the fastest growing and one of the household electrical appliances with the highest market growth rate. Not only has its ownership rate in households soared, but its wide application in business has also led manufacturers to invest heavily in the development of commercial products. The market space for high-power commercial induction cookers is huge. The commercial environment of high-power induction cookers is mainly concentrated in restaurants that cannot use gas, such as hot pot cities, fast food chains, and large commercial centers; electric trains, passenger and cargo ...

AI Technical Summary

Problems solved by technology

[0004] 1. The safety is not high, easy to damage

High-power induction cooker is a strong electric product, with large inverter current and high voltage, and has high requirements on the components of the induction cooker. If the circuit design is not good, it is easy to cause the circuit and components to burn out, affecting the work of the induction cooker and the kitchen. personnel safety

[0005] Second, the cost is high and it is not easy to promote

Many research and development units use full-bridge inverter circuits or use transformers for power output, which greatly increases the hardware cost of the device

And because the safety protection circuit and software control design are not adopted, the large current generated during use is easy to burn out the components of the power module, and the IGBT components of the power module are very expensive, accounting for a high proportion of the hardware cost, and the maintenance cost is too high Virtually increases the hardware cost of the device

[0006] 3. At present, the output power of the existing electromagnetic cooker control scheme is limited, and it has not been modularized. It cannot expand the power according to the needs of users, and cannot independently expand and combine at will, and has not formed a product series that meets the power needs of various users.

[0007] 4. The control method cannot accurately control the power output of each gear

The pot material, size, and the distance between the heating coil plate and the pot are important factors that affect the difference in output power. During the installation process, there are installation errors in the heating coil plate that lead to differences in output power. Changes in pot material and pot Changes in tool size will also lead to changes in output power. There are differences in heating power, and the output power of the induction cooker cannot be accurately controlled. The heating power of each gear is unstable and the control accuracy is poor.

In addition, when the grid voltage fluctuates or some uncertain factors such as the change of the resonance point due to the increase of the load temperature occur, it will also cause unstable changes in the output power of the system.

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