Micro-motor water resistance soft start control device

Abstract

The invention discloses a micro-motor water resistance soft start control device for controlling a water resistance cabinet in a micro-motor water resistance soft start device. The micro-motor water resistance soft start control device comprises a wire drawing displacement sensor and a control device, the wire drawing displacement sensor is electrically connected to the control device, a three-phase electric signal input end of the control device is electrically connected to a three-phase inlet wire, and a steel wire of the wire drawing displacement sensor is mounted on a movable conductive electrode plate of the water resistance cabinet. By the aid of the micro-motor water resistance soft start control device, start of a motor is optimized, start success rate is increased, and the motor can be effectively protected from possible failure in the starting and running process.

Description

technical field [0001] The invention relates to a field of soft starting, which can be used for but not limited to the soft starting and motor protection of large and medium-sized squirrel-cage motors, wire wound motors or synchronous motors with a rated voltage of 3-110KV and a rated power of 200-20000KW, and is widely applicable Used in building materials, metallurgy, mining, petrochemical, electric power, papermaking, system water conservancy and other industries. Background technique [0002] At present, the soft start of water resistance is mainly controlled by PLC to start the motor. This starting control method cannot accurately control the position of the movable conductive plate, and the position of the plate is determined by several limit switches; there is no man-machine interface, and it cannot be set when the motor is started on site. Starting parameters, motor starting and running real-time data cannot be monitored; due to the use of many intermediate relays an...

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Problems solved by technology

[0002] At present, the soft start of water resistance is mainly controlled by PLC to start the motor. This starting control method cannot accurately control the position of the movable conductive plate, and the position of the plate is determined by several limit switches; there is no man-machine interface, and it cannot be set when the motor is started on site. Starting parameters, motor starting and running real-time data cannot be monitored; due to the use of many intermediate relays and limit switches, the circuit is complex and the cost is relatively high, and maintenance is inconvenient; there is no motor protection function; because the motor is started by detecting the limit switch , there is no current and temperature acquisition feedback function, the pole plate cannot be moved to the best starting position when the motor is started, and the starting efficiency and success rate are low

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