"

lol竞猜_lol赛事竞猜_lol联赛竞猜_lol竞猜官网拥有全球最顶尖的原生APP，每天为您提供千场精彩体育赛事,lol竞猜_lol赛事竞猜_lol联赛竞猜_lol竞猜官网更有真人、彩票、电子老虎机、真人电子竞技游戏等多种娱乐方式选择,lol竞猜_lol赛事竞猜_lol联赛竞猜_lol竞猜官网让您尽享娱乐、赛事投注等，且无后顾之忧!

"

Facabook Twitter Linkin Youtube Contact Us

行业应用

Industry Applications > Applications > 正文

Powtech PT200 frequency converter application in CNC machine tool

更新时间：2012-12-27点击次数：3857次字号：T|T

1. Introduction

At present domestic CNC machine tools spindle servo system mainly adopts dc servo system, and some use the spindle servo system of ac speed regulating all rely on imports, price expensive, most other ac induction machine drive system is adopt imported frequency converter, this not only make the country lose a lot of foreign exchange, but also serious restricted the our country electric power electronics field, the formation and development of high-tech industries. Home-made frequency converter USES V/F control, mostly because of the speed precision affected by slip and load, can't accurate control of motor speed, there exists a low control precision, poor dynamic performance and the high failure rate, less control functions, and improve the stator voltage compensation is difficult to completely and load match, the torque at low speed. So the V/F control frequency converter, in particular, shall not apply to requirements such as nc machine tool spindle, servo transmission machinery of high precision, fast response.

This paper mainly introduces the unique PT200 vector frequency converter performance and superior cost performance, and the successful application in the numerical control machine tool.

2. CNC machine introduction

Nc machine tool is a comprehensive application in thirty years collection of mechanical, electrical, hydraulic, pneumatic, micro-electronic and information technologies for the integration of mechanical and electrical integration products, in the machinery manufacturing equipment with flexible, general motors, high precision, high efficiency "flexible automated production equipment, it will be needed for a variety of processing operations and step size and the shape of the workpiece, using the digital code, by controlling the media into CNC equipment, CNC equipment to input information processing and computation, command control machine tool system and the driving element, automatically processing the required artifacts. Nc machine tool technology level and its application in metal cutting machine tools production and total ownership percentage, is the measure of a country national economy development and an important symbol of the overall level of industrial manufacturing. In recent years, our country enterprise of nc machine tools share rise year by year, in large and medium-sized enterprises have more use, also common in small and medium-sized enterprises and individual enterprises begin to use.

3. Powtech PT200 introduction to vector converter features

Powtech PT200 series frequency Manager used advanced of no sensor vector control technology, motor in low speed Shi go moments large, has zero servo features, run frequency in 0Hz Shi has 100% of go moments output, and speed precision high, price reasonable, features complete, to automatically detection motor dynamic running of parameter and made corresponding adjustment, to guarantee motor running in Supreme efficiency State, therefore, vector frequency Manager can instead of Exchange servo system, is machine industry best of select. For customers due to the inverter's high performance-price ratio, frequency converter used to be widespread on the lathe.

1) advanced technology, compact design, the products look beautiful and elegant;

2) control method for vector control without sense, controlled performance than previous VF control in a very significant improvement, particularly in low-speed torque to meet demands of machine tool spindle, 0.5HZ starting torque can reach more than 100%;

3) 0~16KHz carrier frequency range, ensure that the motor high quiet running;

4) power range 0.75kw~500kW, 0.0~800.0Hz output frequency range, suitable for applications of high speed CNC machine tools;

5) provides a standard analog interface 0~10V,4~20MA;

4. the debug environment, debugging and wiring methods

1) parameters of 3.7kW CNC lathe motor: nominal power: 3.7kW, rated frequency: 50Hz, rated voltage: 380V, rated current: 8.6A, rated speed: 1450r/min Mechanical transmission ratio: 1:1.5 Material: 45# steel Actual test performance indicators: spindle speed: 450R/min (inverter frequency about 15Hz), feed speed: 50mm/min, unilateral approach: 2.5mm, very good running, actual feed speed and unilateral approach can also increase.

2) 5.5kW CNC lathe Motor parameters: power rating: 5.5kW, rated frequency: 50Hz, rated voltage: 380V, rated current: 13A, rated speed: 1450r/min Mechanical transmission ratio: 1:1.5 material: 45# steel Actual test performance indicators: spindle speed: 450R/min (frequency Manager run frequency 14~15Hz), into knife speed: 60mm/min, unilateral into knife volume: 2mm; spindle speed: 600r/min (frequency Manager run frequency 20Hz around), into knife speed: 60mm/min, unilateral into knife volume: 4mm, run of effect is good, actual of into knife speed and unilateral into knife volume also can increased.　 Customer matching motor is 3.7KW/50Hz/380V, for the selection of inverter models PT200-004G-3B, braking resistor of 1000 watts/100 ohms.

AI1\GND inverter speed analog terminals provided with CNC system, AI1 CNC system signals analog interface, GND negative signals, signal for 0~10V analog voltage signals to control spindle speed. DI1/DI2/COM forward/reverse signal for frequency converter terminals, usually issued by the CNC system is turn signal DI1 or reverse the DI2 to drive the relays in the Middle, intermediate relay normally open contacts connected to the transducer DI1/COM or DI2/COM that can control the inverter reverse.

Parameters are set as follows:

1) P01.11 and P01.12 for the acceleration and deceleration time, depending on customer requirements, P01.11=2S,P01.12=1S;

2) P03 sets of parameters set according to the motor nameplate, and can also be automatically detected.

3) P01.08 maximum operating frequency choices corresponds to the analog signal 10V input, inverter output frequency, because it is in the 0~3000rpm range increase speed, mechanical reduction ratio after this count, this parameter needs to be set to 100Hz;

4) P01.03 parameter setting for operation signal source, signal control set to external terminals;

5) set P01.03 parameter to select the primary frequency input source is set to analog signal 0~10V input, P01.03=1, AI1 analog output signal;

6) select P01.00 as control, you need to select vector control, P01.00=1, sensorless vector controlled inverter runs on calculus systems, providing additional torque compensation of voltage, in addition to increased low speed torque of the motor, and can compensate for a load increase caused by slipping.

5. Conclusion

CNC machine tool spindle generally ac servo system, imported brand vector control inverter and frequency conversion motor, purchase cost is very high; European families PT 200 series inverter with its unique performance and superior cost-effective, rapid rise in the application of CNC machine tools, to become a powerful force on the market at present, for the machine tool industry customers reduce about double the cost, and high reliability, create more benefits for our customers.

上一篇：Powtech application of inverters in wire drawing machine（2）
下一篇：Powtech frequency converter application in paper machine accessories

lol竞猜_lol赛事竞猜_lol联赛竞猜_lol竞猜官网