light industry

一、preface
As people demand more and more high quality of life, fitness has become a part of everyday life for many urban people. As a kind of simple and practical fitness equipment, fitness equipment has become the first choice for fitness equipment. Treadmill is also from the early luxury into ordinary people's homes. Using a treadmill running than in outdoor running the biggest benefit is treadmills provide shock absorption effect, reduce the impact force of knee joint running, the fitness staff from sports injuries.
The early treadmill is generally constant speed or DC speed, there are defects or expensive properties. At present, the use of frequency control and general induction motor has become the standard configuration of the treadmill.

二、The requirement of running machine to frequency converter
The basic function of a running machine is to simulate a professional runway, the runway of the direction of movement of the movement in the opposite direction, at the same time must maintain the same speed, so that the movement can be in place to exercise.
There is no doubt that the motor is the treadmill's heart, electrical system is the heart pacemaker. Electric system is the core of the inverter, inverter performance is good or bad, a direct impact on the performance of the treadmill. Because when people use the treadmill, usually to start running on a treadmill, therefore treadmill requirements inverter has very good low frequency torque characteristics; when people on the treadmill running, load as the run personnel running and change, the load will not stop change, but is treadmill speed required to keep consistent, can not change, thus requiring frequency converter has a high precision velocity control; for treadmill is usually used in the interior of considerable sensitive to noise. Therefore, the inverter has good silent.

三、Yichuangfei ECF300 vector inverter treadmill solutions
Yichuangfei ECF300 vector type of inverters with leading global vector control algorithm, the stator current according to the coordinate transform decomposition for the torque current component and the exciting current component, so that the control characteristics of the AC motor to achieve the control performance of the DC motor and Application on a treadmill with has the following characteristics:
1) can provide open loop mode under 0.50Hz 180% of the rated torque, with the full load (people stand on the treadmill), starting from zero speed.
2) fully decoupled vector control algorithm to achieve accurate torque control and speed control. Torque control accuracy of 5%, speed control accuracy in the open loop mode up to + 0.2%. Compared with the V/F control algorithm, it has the advantages of good low frequency torque characteristics, good dynamic response characteristics, high speed control accuracy and so on.
3) Gao Zaibo silent running. Yi Chuang Fei ECF300 vector inverter provides the highest 16 kHz carrier frequency, the complete elimination of the induction motor use frequency converter, due to low carrier frequency caused by electromagnetic whistlers.
4) wide speed regulation range, general treadmill speed regulating range is 1:20, Yi Chuang Fei record highest ECF300 vector inverter up to 1:40, far beyond the equipment requirements.
5) special under voltage protection mode, which improves the safety protection of the sports personnel. Yi Chuang Fei ECF300 vector inverter can flexibly set the inverter owe voltage protection point; at the same time when the voltage is lower than the protection point, the inverter is not under pressure down, but through active deceleration of the motor as a generator, inverter fed, thereby controlling the motor to slowly decelerate to stop.
6) standard configuration RS485 communication interface, can communicate with the controller, greatly simplifies the wiring and control mode. Keyboard with the parameters of the copy function, simplify the workload.

 
四、Concluding remarks
Yi Chuang Fei ECF300 vector inverter with excellent performance, which solves the technical difficulties in some long-standing treadmill manufacturers, greatly improves the competitiveness of products, on a treadmill after a launch will be well received by users.