Which master can provide the electrical control circuit course design of the mine hoist?

You can refer to professional books such as "Mine Lifting" and "Electric Drag and Control".

Transmission part: included.

1. Reversing part: provide power supply for the stator, and control the direction of the rotating magnetic field by switching the phase sequence of the stator power supply through the positive and negative contactors.

2 rotor screen and resistance: control the number of stages of series resistance in the rotor circuit, so as to achieve speed regulation 3 power braking part: put in when the weight is lowered, direct current is passed into the stator at this time, and the direction of the force of the induced electromotive force acting on the motor generated by the rotor cutting the magnetic field line is opposite to the direction of the gravity of the heavy object, so that the speed regulation of the negative force is realized by changing the size of the DC current.

Control part: including safety circuit, high-voltage reversing control loop, power brake control loop, tachogenerator circuit, hydraulic station lubrication station control loop, delay relay circuit, etc., please see the drawings for details.

The electronic control system of the hoist is composed of:

1. Control system, main control system, auxiliary control system.

2. Speed control system, speed control system, power supply system.

3. Monitoring system, upper computer, operating console.

Hope it helps.

Ordinary electronic control. Main configuration: stator screen, rotor screen, relay screen, power brake screen, control panel, metal resistor.

Working principle: The method of string resistance speed regulation is to connect a metal resistor in the rotor circuit of the asynchronous motor around the punching bout line, and use the controller to gradually remove the resistance for speed regulation.

Advantages: small one-time investment cost, simple equipment and convenient maintenance.

Disadvantages: Waste of resources and poor speed regulation performance after equipment operation.

PLC electronic control.

Main configuration: power reversing cabinet, operation console, power control cabinet, rotor control cabinet, sub-PLC console, tachogenerator, shaft encoder, etc.

Working principle scattering: the use of double PLC control, to meet the "Coal Mine Safety Regulations" protection of the two-wire system requirements, in addition to completing the manual and semi-automatic operation process of the winch, but also through the high-speed counter module to receive the pulse signal sent by the shaft encoder, precision calculation and display of the position and speed of the tank cage (or minecart), and accordingly to provide reliable soft deceleration point and overspeed, soft overcoiling protection.

Advantages: the system is safe and reliable, the equipment is small in size, and the installation and debugging are reeds.

Frequency conversion electronic control. Main configuration: operation console, power cabinet, resistance cabinet, inverter cabinet.

How it works

The frequency conversion speed regulation method is an asynchronous or synchronous motor, and the method of changing the stator frequency to change the synchronous speed of the motor is used to achieve speed regulation.

Advantages: stepless speed regulation, energy saving, good motor performance, stable work.