Low-voltage electric motor protection controller and CAN bus connected multipoint remote-control device

Abstract

Provided is a low-voltage electric motor protection controller and CAN bus connected multipoint remote-control device. A DSPIC33EP64 digital signal processor is connected with a high-speed CAN bus interface VP230 chip, the VP230 chip is connected with a low-voltage electric motor protection controller and a CAN bus communication looped network, an electric motor side local control remote device, a production process link remote control device, a centralized operation remote control device and the low-voltage electric motor protection controller are connected to the CAN bus communication looped network, the digital signal processor is connected with a EL817 photoelectric coupler, and the EL817 photoelectric coupler is connected with an external starting and stopping button. By using the CAN bus communication looped network, the original hardware cost and the maintenance cost can be reduced, the safety of the device during operation is improved well, the possibility that an operating worker in a field continuously and repeatedly starts an electric motor during electric motor failure is also avoided, the motor burning-down possibility and production risk are reduced, electric motor halting failures are handled and inquired effectively, the production efficiency is improved, and the production safety is ensured.

Description

technical field [0001] The invention relates to a low-voltage motor control device, in particular to a low-voltage motor protection controller connected with a CAN bus to realize a multi-point remote control device. Background technique [0002] At present, motor protection controllers are mostly used in motor control to protect and control motor operating data. Motor protection controllers have gradually replaced traditional thermal relays and become mainstream products in motor protection and motor control centers (MCC). The motor protection controller is usually installed in the control cabinet of the low-voltage power distribution room, which is far away from the motor operating site. In the motor control, the on-site start and stop control of the motor is usually only realized by hard-wiring buttons. The on-site operation control box cannot query the motor's operating data, operating status and protection faults, causing the on-site operators to repeatedly start the mot...

AI Technical Summary

Problems solved by technology

The motor protection controller is usually installed in the control cabinet of the low-voltage power distribution room, which is far away from the motor operating site. In the motor control, the on-site start and stop control of the motor is usually only realized by hard-wiring buttons. The on-site operation control box cannot query the motor's operating data, operating status and protection faults, causing the on-site operators to repeatedly start the motor without troubleshooting the motor fault, causing the motor to burn out

At the same time, at the monitoring point of the main process equipment in the motor production link, due to the distance from the motor on-site operation box, it is impossible to monitor the entire production operation of the motor in the process production and operation link, resulting in external failures in the production process.

In addition, the automation efficiency of the entire production process is affected by faults such as motor heating, stalling, and overload.

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