High Voltage Variable Frequency Speed Control System
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High Voltage Variable Frequency Speed Control System
This product is suitable for the speed control of AC motors with power supply voltage from 3KV to 10KV and motor power from 200 to 5000KW. The high voltage frequency conversion device adopts new technologies such as phase shifting rectification, power unit series superposition, true rotor flux vector control and active front-end energy feedback, etc. The technology has reached international advanced level and filled the gap in China.
It is the best combination of AC hoist electrical control and transmission technology, and has become the preferred solution for modern mine construction.
Scope of Supply：
System technical features:
High quality input:
No harmonic pollution, pure power input, meet the requirements of IEEE519.1992 standard: 2) Protect the on-line equipment from harmonic interference.
High power factor:
Network side power factor up to 95% or more, without any power factor compensation device.
High quality power output.
1) Perfect output waveform, harmonic content less than 2%, lower than the national standard (4%). No output filter is required: it can effectively prevent the motor from heating caused by harmonic current.
2) Provide multiplexed pulse width modulation output waveform, which will not cause additional noise to the motor.
3) Adopt real rotor flux vector control technology, good low-speed torque characteristics, starting torque up to more than twice the rated torque.
4)Protect motor insulation and cable from damage of dwdt stress, no special insulation requirement for motor, no restriction on cable length.
5) Stepless speed regulation, small inrush current during starting and acceleration, strong overload capacity, which can extend the life of motor and mechanical equipment.
6)Allow 150% Ie running for 1 minute, 180%le overcurrent protection.
High efficiency .
1)Total efficiency of inverter>96%, efficiency of inverter part>98%.
2)Significant power saving effect, according to actual measurement can reach more than 30%.
High reliability:
1)Powerful self-diagnosis and protection.
2)The power unit adopts fiber optic communication control and complete electrical isolation.
3)Adopt power unit series stacking technology, using low-voltage devices to complete high-voltage output, safer equipment operation.
4) Power unit modular structure design, interchangeability.
5) Built-in PID regulator, which can realize closed-loop operation; 6) Redundant design of control part, which realizes the safety circuit double-wire system.
System control method:
The system is divided into two control modes: manual and automatic. In manual mode, the operator can adjust the speed by himself, and in automatic mode, the winch will automatically accelerate to the rated speed and then automatically decelerate and stop after giving the running signal. Equipped with a new type of main command controller has the advantages of reliable action and convenient operation, UPS has the function of continuous power supply to the system after power failure, the system can accurately realize the secondary braking, dual PLC design site connection is fast and convenient.
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Address: No.759, Guomao Road, Hi-tech Development Zone, Xintai City, Shandong Province
Tel: +86-538-7058222
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