The speed control of the wire rope electric hoist is mainly achieved through the following methods:

1、 Variable frequency speed control

Principle: Use a frequency converter to change the frequency and voltage of the motor power supply to achieve the purpose of motor speed regulation. The frequency converter can automatically recognize the electrical parameters of the motor through self-learning and drive the motor using high-performance sensorless vector control.

characteristic:

Large speed range and good smoothness of speed regulation.

The energy-saving effect is obvious, and the mechanical impact force is small.

The short-term overload capacity can reach 150%.

It can be operated remotely with high control accuracy.

Application: Suitable for scenarios that require precise speed control, such as heavy-duty lifting, precision positioning, etc.

2、 Electrical control (direct control)

Principle: The electric motor uses the button switch on the wire rope electric hoist handle switch to connect or disconnect the contactor contacts of the motor, achieving single and double speed, forward and reverse control of the motor.

characteristic:

Easy to operate, send control commands directly through buttons or remote control.

It can achieve single and dual speed control for lifting and operation.

The speed ratio during dual speed is usually 1:10.

Application: Suitable for scenarios where speed control requirements are not very high, such as lifting and handling general cargo.

3、 Other speed regulation methods

Motor rotor and resistance adjustment: By adjusting the motor rotor and resistance, the motor speed can be changed, but this method is relatively simple, with limited speed range and poor stability.

Hydraulic push rod adjustment: Using hydraulic push rod mechanism to adjust the speed of the motor, this method is relatively stable, but may not be ideal when pursuing high speed.

Power regulation: By adjusting the output power of the power source (such as the engine or electric motor) to control the speed of the electric hoist, this method has high energy efficiency, but may not be precise enough for low-speed control.

4、 Precautions in practical operation

When performing speed control, it is necessary to calculate the motor output power based on the mass and shape of the lifting object to determine the appropriate specifications for the motor and reducer.

Pay attention to the heat dissipation, noise and other issues of electric hoists during use, as well as their coordination with lifting objects.

Ensure the coordination between the brake and motor control to ensure smooth and precise start stop of the lifting object.

Regularly maintain and upkeep the electric hoist, including checking the operating status of the motor, transmission components, lubrication system, etc., timely replacing damaged components, and adding lubricating oil, etc.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment