Commercial Refrigeration Compressor Motor Mutual Inductance Non-contact Current Starter

Abstract

A commercial refrigeration compressor motor mutual inductance type noncontact current starter comprising a box body, a starting control mechanism, a zero-power-consumption starting mechanism, a box body cover, an external terminal mechanism and a plug pin mechanism, wherein a starting control mechanism cavity and a zero-power-consumption starting mechanism cavity are arranged in the box body, the starting control mechanism is arranged in the starting control mechanism cavity, the zero-power-consumption starting mechanism is arranged in the zero-power-consumption starting mechanism cavity, an inner part of the box body cover is provided with relief holes for a plug pin M and a plug pin N and external electrode slice plug pin relief holes, the external terminal mechanism is arranged at one side of the box body cover, and the plug pin mechanism comprises the plug pins M and N. The commercial refrigeration compressor motor mutual inductance type noncontact current starter is characterized in that the starting control mechanism cavity is separated from the zero-power-consumption starting mechanism cavity via an insulating separation wall; the starting control mechanism cavity comprises a current transformer cavity, a bidirectional silicon controlled rectifier cavity and an electric inductor cavity; the zero-power-consumption starting mechanism cavity comprises first and second PTC cavities; the starting control mechanism comprises a current transformer, a bidirectional silicon controlled rectifier and an electric inductor; the zero-power-consumption starting mechanism comprises first and second PTCs, internal and external electrode slices and electrode slice resistors. The commercial refrigeration compressor motor mutual inductance type noncontact current starter is safe and reliable, energy can be saved, requirements for heavy current starting can be met, high assembling efficiency is achieved, and good modularization effects are fulfilled.

Description

technical field [0001] The invention belongs to the technical field of starting and running devices for refrigeration compressors, and in particular relates to a mutual-inductance non-contact current starter for motors of commercial refrigeration compressors. Background technique [0002] The aforementioned commercial refrigeration compressors are relative to household refrigeration compressors. Specifically, the former is mainly used in commercial channels such as supermarkets, restaurants and shopping malls and has a large starting current, while the latter is mainly used in households and has a relatively small starting current. . According to the knowledge in the industry, whether it is a commercial refrigeration compressor or a household refrigeration compressor, a starter is usually connected in series in the starting circuit of the refrigeration compressor. Current (for example, the rated operating current of the compressor is 1A, and the starting current is 4-7A). W...

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Problems solved by technology

Although the current type heavy hammer starter belongs to the category of non-power consumption starters, because its structure is in the form of contacts, it is easy to oxidize between the contacts or at the contacts, and it is easy to catch fire when it is in motion, so it is safe and reliable. Reliability is relatively low; the structure of the voltage-type hammer starter is also a contact type, so in addition to the shortcomings of the aforementioned current-type hammer starter, there is also a problem of power consumption; the PTC starter is not only a Power dissipating (required to be maintained in a high impedance state by albeit a small current), and due to the large current flowing through it, the requirements on (PTC) itself are very stringent

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