Because the elevator is manned tool for drag system is reliable, but also to frequent deceleration and positive and negative

Because the elevator is manned tool for drag system is reliable, but also to frequent deceleration and positive and negative turn, elevator dynamic characteristics and the improvement of reliability, and increased the elevator ride sense of security, comfort and efficiency. In the past the elevator control dc is in the majority, in recent years gradually into rotating joints ac motor frequency control of motor speed, whether Japan, or Germany. Our country a lot of elevator factory have vied with one another in frequency control of motor speed to equip the elevator. Such as Shanghai mitsubishi, guangzhou Hitachi, Qingdao Fuji, tianjin Otis adopts ac frequency control of motor speed. A lot of original production of elevator and variable frequency transformation. Many people sit over shenzhen window of the world of monorail elevated touring car, the car driving frequent starting, parking, uphill and downhill, and requirements on off smoothly, speed constant.
Because be manned vehicle, operation must be safe and reliable, perennial, that is to say, bad environment. Before the performance of speed for high drive, the adoption of the belt velocity feedback of vector control system, the price is higher. In order to lower the price, and convenient maintenance, we adopted universal converter torque vector control mode, successfully resolved the starting/acceleration, parking/reduction, constant speed/variable speed drive, etc., and prevent the "down", "impact station" phenomenon production, achieve the safe and reliable, the user is satisfied. This transformation is made by our company shenzhen electronics co., LTD.
Finished. Case 4, mixer class load Chemical, pharmaceutical industry mixer is very much, use frequency control of motor speed to replace other speed regulating mode, it has good. Northeast pharmaceutical factory hydrogenated fermentation post consists of eight table 6.5 tons of fermentation tank, motor power for 18.5 KW, belongs to rotary union gear speed control, such as the case of mixing speed change need to remove the triangle belt, was bulky and unsafe. Convert frequency control of motor speed, the annual energy saving 86000 KW, fermentation process improved obviously and improve the product quality, reduce the maintenance, only reduce triangle belt cost will save 30000 yuan, reduce the labor intensity, be beneficial to the factory, be beneficial to workers. And as: shijiazhuang HuaShu pharmaceutical factory with 10 sets of 315 kw converter drive mixer in pharmaceutical process production terramycin. Example 5, the injection molding machine class load The plastic injection machine is the key equipment of plastic molding processing, quantity, great power consumption. The past power saving mode for through the train type conversion Y type (star) to fiber optic rotary joint energy-saving, the effect is general.
The frequency converter speed control does not change the structure of the original injection molding machine, control oil pump several process pressure or flow (such as clamping, closing, shoot glue, the pressure, and demoulding, back mould, etc.), power saving 20% ~ 52%, better replace the past proportional valve throttle control way, greatly reduce the energy consumption and the pearl river delta for many of the injection molding factory has carried on the variable frequency transformation. Transformation injection molding machine, attention should be paid to joint acceleration, otherwise the yield decreased; Pay attention to the input and the output harmonic interference.