Reversible magnetic starter of general power-driven multi-turn execution mechanism

Abstract

The invention relates to a reversible magnetic starter of a power-driven multi-turn execution mechanism. A display unit comprises a touch screen; an operating unit comprises a test / working mode selection switch, the touch screen and a change-over switch; a signal acquisition unit comprises a signal processing board and an analog-digital conversion module; and the units are connected with a programmable controller of a control unit respectively. The reversible magnetic starter is high in reliability and strong in anti-interference capacity, is used for controlling local / remote places, start, closure, stop, self protection / instantaneous release, travel limit, torque limit and the like of the power-driven multi-turn execution mechanism, and carries out comprehensive protection on turn-on of a contact of a contactor, current overload, current short circuit, default phase, under-voltage, earth leakage latching resistance and the like in real time; and the touch screen displays working conditions or fault types and parameters in real time, and can carry out recording, storage and viewing.

Description

technical field [0001] The invention relates to a reversible magnetic force starter, in particular to a reversible magnetic force starter for electrically driving a multi-rotary actuator. Background technique [0002] At present, manual multi-rotary actuators can no longer meet the requirements of modernization, and large and medium-sized manual multi-rotary actuators are gradually being replaced by electric-driven multi-rotary actuators. [0003] The drive of the multi-turn actuator is electric drive, and the magnetic starter realizes various functions such as opening, closing, stopping, local / remote control of the multi-turn actuator, and performs stroke, torque, and ground leakage of the multi-turn actuator. Lockout, overload, short circuit, phase failure, undervoltage and other protections. The reversible magnetic starter of the multi-rotary actuator currently used is controlled by a single-chip microcomputer system or a discrete component system. [0004] However, whe...

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Problems solved by technology

[0004] However, when used in an environment with harsh working conditions, complex electromagnetic environment, and strong interference signals, the existing reversible magnetic starters of multi-rotary actuators have the following problems:

[0005] (1) Reliability, stability and anti-interference are poor, and malfunctions often occur;

[0006] (2) The selection of local / remote control, self-holding / instantaneous operation needs to be realized after the power is cut off, and the wiring cavity can be disassembled to change the wiring. It cannot be changed in real time according to the needs, which is not safe and convenient.

[0007] (3) When the AC contactor that controls the forward and reverse rotation of the multi-turn actuator fails due to problems such as voltage or magnetic coils, and cannot work normally, the reversible magnetic starter does not judge whether the AC contactor is closed or not, and checks it. Protective function

[0008] Due to the above problems, there are hidden dangers of accidents in production and safety, which need to be improved urgently.

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