The successful development of the permanent magnet internal mine hoist has completely overturned the traditional hoist. The external rotor permanent magnet synchronous motor is adopted, the permanent magnet is installed on the inner wall of the drum, as the external rotor of the permanent magnet motor, and the working winding coil is fixed on the main shaft as the motor stator. The technical features of the permanent magnet synchronous motor are multi-series, low frequency, low speed and large torque, and low frequency converter is used for speed regulation. Compared with the traditional hoist, the permanent magnet built-in mine hoist has broken through a number of key technologies, and the product technology is the international leader, which has the incomparable advantages of the traditional hoist.

Product features:

★High efficiency, under light load can also ensure higher efficiency, light load efficiency is higher than the asynchronous motor more than 20%.

★The power factor is high, basically close to 1, the current is small, the supporting power supply capacity is lower, the cable specification can be smaller, and the system investment is reduced;

★The allowable pulse torque is large, high acceleration can be obtained, and the dynamic performance is good;

★Low noise and high overload capacity;

★Simple and compact structure, small size, light weight, small footprint;

★Low speed and high torque, can directly drive the load, no intermediate mechanical transmission, small vibration, low failure rate.

★Under multiple driving conditions, the power balance control is more accurate to ensure the output balance of the motor;

 

Variable Frequency Speed Regulation System of Permanent Magnet Motor Mine Hoist

1. implementation of technical standards and regulations

1. The latest edition of Coal Mine Safety Regulations

2. General safety requirements for hoisting electric control device of mine hoist

3. Electromagnetic compatibility of industrial over-control measuring and control devices GB/T13926-92 and IEC standards

Basic Measurement Methods of Industrial Radio Interference (GB3907-83)

5. Basic Measurement Methods for Anti-interference Characteristics of Electrical Equipment (GB3907-83)

6. Code for Design of Mine Electric Power (GB50070-2009)

7. Code for Design of Low Voltage Distribution (GB50054-2)

8. Electronic Control Equipment Part I: Low Voltage Electrical Control Equipment (GB4720)

9. Electronic Control Equipment Part II: Electronic Control Equipment Equipped with Electronic Devices (GB3797)

10. "Digital Interface for Programmable Control Instruments" GBT15946

11. Code for design of relay protection and automatic devices of electric power installations (GB50062-2008)

12. Imported electrical equipment comply with the International Electrotechnical Commission (IEC1311-3) standards

13. GB4208-2008 on Classification of Protection Levels of Enclosures

2. system model meaning ZTKP-PC-YT □/□

Z-Device

T-Lift

K-electric control

P -- variable controller speed regulation

-PC--PLC control

-YT-Permanent magnet synchronous machine

□-Rated current (A)

/□-Rated voltage (V)

3. variable frequency speed control system

1, the use of high-performance low-speed high-torque synchronous machine special frequency converter, speed, current, position closed-loop control, with regenerative feedback function, can be generated when the power back to the grid, the minimum stable operating frequency of 0.01Hz.

2, the overload capacity is greater than the overload capacity of the motor, to ensure that the load change is -120~0 ~ +120%, the converter device can meet the four-quadrant safe operation requirements.

3. It has the following functions

1) Can automatically find the magnetic pole position of the permanent magnet motor

2) with the main circuit overvoltage, overcurrent protection

3) S-shaped curve with impact prevention during acceleration and deceleration;

4) The display and adjustment of parameters are set through menu instructions;

5) with torque and current limiting function;

6) Optimize the parameters of current regulator and speed regulator;

7) the device itself self-monitoring and self-diagnosis and alarm function

8) With MODBUS, PROFIBUS and other communication functions

Frequency converter

4. control system

1. The operation and safety protection system is controlled by Siemens dual-PLC and dual-wire. The main and auxiliary PLC communicate and monitor each other. It has three safety protection circuits, including two software safety circuits and one hardware safety circuit. Multiple safety protection circuits are redundant with each other. Double or multiple protection is adopted for key links, such as over-rolling and over-speed, which fully meets the requirements of Coal Mine Safety Regulations.

2. The PLC operation control system can complete the control requirements of various operation modes such as automatic, semi-automatic, manual, rope inspection and emergency control of the hoist.

3. When a set of PLC fails, the hoist can realize emergency start-up and must have various protection functions stipulated in the current "Coal Mine Safety Regulations.

4. With remote expert diagnosis function, technicians can observe and analyze the input and output ports and intermediate parameters of the electric control through the network.

5. Memory function: when the safety brake (secondary brake), emergency brake (primary brake) and the system are powered off and stopped, the previous setting parameters and the position and state of the winch can be stored, so that when the power supply is restored, the stored contents can be automatically restored

6. It has the following safety protection: A, over-roll and over-release protection; B, overload and pressure loss protection; C, constant speed section overspeed; D, deceleration section overspeed; E, 2 m/s speed limit protection f, wrong direction operation; G, brake shoe wear protection; H. spring fatigue protection; I. depth indicator failure; J. inverter failure; K. encoder failure; L. Man Cang Protection; M, high brake oil pressure; N, high brake oil temperature; O, high temperature of the main motor; P, loose rope protection (single rope winding type); Q, wire rope slip (multi-rope friction type); R, sound and light deceleration signal protection; S, anti-sports car interlock protection; U. handle zero protection; V. brake failure protection.

Full digital dual PLC control console

5. monitoring system

1. Display of digital speed and digital depth, analog animation, doting signal, instant fault, oil pressure, oil temperature, motor current, motor temperature, operating frequency, deceleration signal, brake shoe gap, speed curve, etc;

2, according to different mines to the well depth, speed, deceleration, deceleration distance, parking point, over-roll point and other parameters to set;

3. Fault display, occurrence time and release time.

The successful development of the permanent magnet internal mine hoist has completely overturned the traditional hoist. The external rotor permanent magnet synchronous motor is adopted, the permanent magnet is installed on the inner wall of the drum, as the external rotor of the permanent magnet motor, and the working winding coil is fixed on the main shaft as the motor stator. The technical features of the permanent magnet synchronous motor are multi-series, low frequency, low speed and large torque, and low frequency converter is used for speed regulation. Compared with the traditional hoist, the permanent magnet built-in mine hoist has broken through a number of key technologies, and the product technology is the international leader, which has the incomparable advantages of the traditional hoist.