PFH heavy-duty transmission equipment energy-saving device

The PFH series of energy-saving devices for heavy-duty transmission equipment is a high-efficiency feedback device for high-power and heavy-duty equipment developed and produced using Canadian technology.

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1. PFH series energy-saving devices have "full-process voltage automatic tracking" technology

It can improve the stability of the feedback current during the feedback, avoid serious sudden changes in the current, and improve the power factor during the feedback.

2. Built-in enhanced common mode inductor, full noise filtering, excellent EMC performance

3. Really realize the four-quadrant operation of the frequency conversion speed regulation system

The energy saving rate is as high as 20%~50%, the energy conversion efficiency is as high as 97%, and the energy saving efficiency is extremely high

4. No high-power resistance heating

Effectively suppress temperature rise, improve working environment, and increase equipment service life

5. Comprehensive protection function to ensure the safe and reliable operation of the system

6. Built-in MODBUS communication protocol, easy to realize centralized monitoring

7. Support parallel mode, which can easily realize capacity expansion

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A port gantry crane application case

The lifting mechanism of a port MC type 40T grab gantry crane is composed of supporting and closing mechanisms. Both mechanisms are driven by 160kW variable frequency motors. The inverter model is PH7-04-220NDC, and the speed regulation is closed-loop vector control with encoder. It is a stepless speed regulation mode with gears, using Profibus-DP field bus control, built-in S-curve acceleration and deceleration mode, to ensure the stability of the heavy lifting process, the feedback part uses 2 PFH-04-110PDC in parallel.

Configuration of Frequency Conversion Modification System for MC Type 40T Portal Crane

The comprehensive advantages of a port gantry crane after the transformation are obvious:

(1) Accurate positioning and high efficiency. There will be no change in the motor speed when the load of the traditional crane changes, which can improve the productivity of loading and unloading operations.

(2) Smooth operation and high safety. The vibration and impact of the whole machine are significantly reduced during acceleration and deceleration during operation, which extends the life of the steel structure and mechanical parts of the crane, and improves the safety of the equipment

(3) Reduce maintenance and reduce costs. The service life of the brake pads of mechanical brakes is extended, and the maintenance costs are significantly reduced.

(4) Low failure rate The use of squirrel cage asynchronous motors instead of wound rotor asynchronous motors avoids motor damage or failure to start due to poor contact.

(5) Low harmonic pollution The harmonic pollution of the power supply is less than 2%, and the full load power factor is close to "1"

(6) Simplify the circuit. The main circuit of the motor realizes non-contact control, which avoids the frequent action of the contactor's contact and the electrical damage caused by the contactor's contact burnout.