电池电动工业卡车的行进和提升电机的节能无级变速控制系统。提供给电动机的电流转换为脉冲。脉冲频率和脉冲持续时间通过电动机速度决定行进和提升速度。与电阻式开关电路相比，脉冲控制系统几乎没有损耗和磨损，即使在负载下也能平稳启动。与传统的电阻式开关电路相比，其优势在于可以更好地利用电池容量，并可以提高叉车的位置。

        Energy-saving, continuously variable control system for travel and lifting motors of battery-electric industrial trucks. The current supplied to the electric motor in converted to pulses. Pulse frequency and pulse duration determine travel and lifting speed via the motor speed. In contrast to resistive switch circuits the pulse control systems operate almost free of loss and wear and allow smooth travel start even under load. The advantage over conventional resistive switch circuits is better utilisation of the battery capacity and the improved possibilities of positioning the truck.