The variable frequency speed regulation of the electric forklift stacker has a wide speed regulation ratio and good characteristics. In particular, the closed-loop variable frequency speed regulation can obtain almost rational speed regulation characteristics, and adjust the acceleration and deceleration smoothly and accurately according to the actual needs, so as to reach the destination address with the best dynamic characteristics, and there is almost no low-speed crawling, thus improving the efficiency. Frequency conversion speed regulation is currently the preferred speed regulation solution for relatively high-end electric stackers.
Some electric forklifts use thyristors. The power supply DC speed control system has the widest speed control range, the highest quality, and good dynamic accuracy, but the cost is high and the maintenance workload is the largest. It is mainly suitable for wide speed control ratio requirements and stable starting and braking. For particularly demanding occasions.
Usually, several schemes of electric forklift stacker are mixed, for example, a two-speed motor and another single-speed motor are used to form a double-motor speed change scheme; two two-speed motors are used to form a double-motor scheme; eddy current brakes are used to make the main The motor is decelerated to a low speed and then switched to an auxiliary motor to achieve stable slow-speed operation and so on.
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