Contactless contactor with auxiliary contact

Abstract

A contactless contactor with an auxiliary contact belongs to the field of electrical components. The contactless contactor comprises a housing, a heat radiator, a main circuit board, a main terminal and a control signal terminal. The contactless contactor is characterized in that the housing comprises a main circuit housing and an auxiliary circuit housing which is fixed in front of the main circuit housing; an auxiliary circuit board and an auxiliary terminal are fixed in the auxiliary circuit housing; the main circuit board is provided with a control signal input module and a main circuit module; the control signal input module is connected with the control signal input end of the main circuit module; the auxiliary circuit board is provided with an auxiliary contact module; the driving signal of the auxiliary contact module is from the output end of two random main electronic contacts of the main circuit module, and the auxiliary contact module becomes a real auxiliary contact. The contactless contactor with the auxiliary contact has functions of settling a problem that the auxiliary contact for matching is necessary at an electrical interlock occasion with the contactless contactor, preventing auxiliary contact false triggering which may be caused in a prior-art product in which the auxiliary contact is triggered by a control signal, and ensuring high safety in use.

Description

technical field [0001] A non-contact contactor with auxiliary contacts belongs to the field of electrical components. Background technique [0002] At present, there are three main types of devices used as electrical switches in industrial sites: ordinary electromagnetic AC contactors, ordinary solid-state relays, and ordinary non-contact contactors. The above three devices have the following deficiencies in specific use: [0003] (1) Ordinary electromagnetic AC contactor: there is power loss during use, and when the coil is running, there is noise, and the noise is louder when the armature has dirt. When the load current is large, it is easy to burn the contacts so that the contacts cannot be released in time. When the main electronic contact is loaded and released, it is easy to generate arc ignition, which will ablate the contact and cause poor contact. In serious cases, it will cause a phase loss of the power supply and burn the motor coil. In applications with frequen...

AI Technical Summary

Problems solved by technology

[0003] (1) Ordinary electromagnetic AC contactor: there is power loss during use, and when the coil is running, there is noise, and the noise is louder when the armature has dirt

When the load current is large, it is easy to burn the contacts so that the contacts cannot be released in time

When the main electronic contact is loaded and released, it is easy to generate arc ignition, which will ablate the contact and cause poor contact. In serious cases, it may cause a phase loss of the power supply and burn the motor coil

In frequent switching applications, it is more likely to be damaged

The service life is short, and the control coil consumes a lot of energy, which is more obvious when the power is high

(2) Ordinary solid state relays: The biggest disadvantage of ordinary solid state relays is that there are no auxiliary contacts in them, so they cannot be used in occasions that require electrical interlocking

(3) Ordinary non-contact contactor: the design of the circuit of ordinary non-contact contactor is not mature enough, the failure rate is high, the design form and position of the terminal are different from that of ordinary AC contactor, and there is a need for on-site installation and maintenance. process of adaptation

There is a big disadvantage in this design: if the main power supply is not powered on, but only with the control signal input, the auxiliary contacts will be converted immediately, which will cause danger in some electrical interlocking occasions, which is not allowed

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