Specifications

PMSM Commercial & Industrial Applications


Case Studies A : Solution of Direct feed Wire Drawing Machine

Solution advantages

  • Feedforward PID control mode can be adopted between processes of the system. The main speed is calculated from the metal flow per second from the previous process. As a fine adjustment of the system speed, the speed calculation is made inside the variable-frequency drive, improving response time and simplifying the commission work.
  • Users can choose between speed mode and torque mode for the winding part based on their requirements. The speed mode adopts PID feedforward control method, which requires a tension frame. The torque mode does not need a tension frame, and the winding machine follows the speed of the main machine by maintaining the constant tension of the wire rod;
  • The variable-frequency drive is equipped with built-in winding diameter calculation function, which can quickly and accurately calculate the winding diameter to ensure that the rotation speed of the take-up motor meets the requirements of constant linear speed winding of materials;
  • Motor speed command can be realized through analog quantity, pulse quantity ModBus communication and other methods according to user requirements, and the logic controls to coordinate the different parts within a system are realized by PLC.

Solution features

  • The current vector variable-frequency driver ensures that the system has excellent low frequency performance and dynamic performance;
  • With excellent built-in PID or torque mode, the system has good dynamic performance, and the system is made simple.

Case Studies A.1 : Solution of  Wire Drawing Machine with double Variable Frequency Drives

Solution advantages

  • User can choose between speed mode and torque mode according to their requirements. For speed mode, PID feedforward method is adopted, which requires a tension frame. The torque mode does not need a tension frame, and the winding machine follows the speed of the main machine by keeping the constant tension of the wire;
  • The variable-frequency drive is equipped with built-in winding diameter calculation function, which can quickly and accurately calculate the winding diameter to ensure that the rotation speed of the take-up motor meets the requirements of constant linear speed winding of materials;
  • Automatic detection of material fracture: It can automatically identify the state of material fracture and raise an alarm without an additional detection

Solution features

  • The variable-frequency drive can completely realize the main electrical control of the wire drawing machine without additional controller and, therefore, the system structure is simplified;
  • During operation, the fluctuation of the swing rod is small. When the machine starts after shutdown, the rod will be positions automatically without any human actions;
  • It runs smoothly in the whole working range of linear speed command, and the driving motor can quickly respond to the sudden change of linear speed command;
  • The standard operation panels of the two variable-frequency drives can be relocated outside of the process cells by using extension And they can be used as displays for linear speedometers and meter counters.

Application A : Application of Constant Tension Control System

Solution features

  • High performance vector control / torque control technology realizes constant linear speed and constant tension control;
  • Tension feedback solution: the winding machine outputs the most matching torque according to tension setting, tension feedback signal and current winding diameter. As a result, constant tension control of the system is realized;
  • Tension-free feedback solution: the winding machine automatically follows the speed of the main machine and obtains ideal torque output according to the tension setting and the current winding As a result, constant tension control is achieved;
  • Applicable to the following equipment: slitting machine, coating machine, paper machine, printing machine, compound machine, jig dyeing machine,

Solution advantages

  • Stable control: the closed-loop tension control mode of NE300 tension special variable- frequency drive can provide tension stability in the process of acceleration and deceleration of the system;
  • Integrated winding diameter calculation function and tension control compensation algorithm, simplifying PLC program development and making it effective and convenient;
  • Double-station winding: With the equipped pre-drive function, winding reel can be switched over automatically and quickly without shutting down the line, improving production efficiency;
  • The taper of winding can be controlled conveniently and accurately to avoid bad “flowering cabbage” shape and improve the winding quality;
  • A variety of additional practical functions, such as: fracture detection and alarm, fracture overrun protector, length counter, linear speedometer, etc.

Application B : Compressor Industry

Solution features

  • High performance speed sensor-less vector control technology. High efficiency low energy consuming, energy saving rate can reach max. 50%. Special integrated design to adapt with air compressor operation characteristics, completely change the traditional mode of”general purpose drive + special controller”;
  • Vector control speed stabilization precision is 2%, quickly and accurately response to pressure variation, close-loop cons tant air supply precision can reach ±0.01MPa;
  • High startup torque can fully support compressor fully loading starting
  • Superior overload capacity, wider speed control range, can fully satisfied air system temporary overload requirement;
  • Superior software and hardware protection ensures compressor system reliability and
  • Steady starting and operating, no impact for power grid, low wear, long life, and low

Solution advantages

  • Constant pressure control: Inbuilt high efficiency PID algorithm, quick response to air demand;
  • Frequency conversion/power frequency switching: ensure non-stopping air supply;
  • Intelligent system: Timing control, Automatic sleep, Automatic wake-up and other functions
  • Cascade control: multiple air compressors supply gas at the same time, automatic allocation of working hours and output power
  • User interface: optional text display keypad and touch screen graphic

Application C : Machine Tool Industry

Solution features

  • Variable V/F and vector control modes are applicable for various machine tools, e.g.: lathe, miller, driller, grinder, and carving machine, ;
  • Unique digital signal tiny pulse harmonic control technology ensures super quiet operation;
  • Variable speed command channels: current/ voltage analog input, pulse input, communication input

Solution advantages

  • High torque at low frequency: Reduce 90% during cutting compared with open-loop control, satisfied machine tools’ principle axis low speed heavy cutting requirement;
  • High speed stabilization precision: speed stabilization precision is 02% of rated speed, speed fluctuation is small;
  • Reliable operation control: inbuilt torque limitation and over voltage protection avoid trip;
  • Quick dynamic response: dynamic torque response time<20mS, small speed fluctuation during instant upload or unload;
  • Superior overload capacity: 150% rated current 1min, 200% rated current 5s.

Application D : Industrial Washing Machine

Solution features

The application has strong adaptability for the input voltage and can also be used under the condition of instantaneous fluctuation of 20% rated voltage;

  • The size is equivalent to 70% of that of other VFD with the same power, which facilitates the installation;
  • The thickened cover enhanced by triple-protection treatment process and optional dust-proof cover plates make the products more reliable in harsh environment;
  • The migration functions of parameters are supported by the operation panels, significantly simplying the commission and maintenance work.

Solution features

Low frequency and large torque: It can output 0.50Hz 180% rated torque, suitable for start-up with load;

  • Reliable operation control: built-in torque limit and undervoltage and overvoltage regulation;
  • Perfect four-quadrant control technology supports forward and reverse rotation and fast acceleration and deceleration, supporting the frequent forward and reverse rotation direction changes during washing;
  • The voltage and current regulation technology under the constant power of the motor enables the motor to work stably at high frequency, which is suitable for high-speed dehydration.

Application E : Torque Motor Substitution Solution

Solution features

  • Significant energy saving effect and reliable operation, without extra heat loss, extend system working life;
  • No requirement for extra encoder, saving cost and completely immune external interference;
  • Retrofit system will not change original operation behavior;
  • Steady torque output, reliable operation.

Solution advantages

  • Superior overload capacity: 150% rated current 1min, 200% rated current 5s;
  • High torque at low frequency: 180% rated torque at 5Hz;
  • Reliable operation control: inbuilt torque limitation and overvoltage adjustment, avoid trip;
  • Quick dynamic response: dynamic torque response time<20mS, small speed fluctuation during instant upload or unload;
  • Synchronized winding: high performance open-loop vector control, ensure post stage winding speed follows the forestage winding at any
  • Full lap start/stop: drive startup torque high and stable even under full lap condition with highest inertia, automatic torque output compensation according to roll diameter variation;
  • Whole speed range operation: winding motor can stably operate at extra low speed(0.5Hz) and relatively high speed, even in motor constant power
 
Rated power / frequency NE200-2Sxxxx: 1-phase 200V ~ 240V; 50Hz/60Hz NE200-4Txxxx: 3-phase 380V ~ 440V; 50Hz/60Hz NE300-4Txxxx: 3-phase 380V ~ 440V; 50Hz/60Hz
Voltage range NE200-2Sxxxx: 176V ~ 264V; Voltage unbalance degree: < 3% ; permissible frequency fluctuation: ±5% NE200-4Txxxx: 304V ~ 456V; Voltage unbalance degree: < 3% ; permissible frequency fluctuation:±5% NE300-4Txxxx: 304V ~ 456V; Voltage unbalance degree: < 3% ; permissible frequency fluctuation: ±5%
Voltage rangeNE200-2Sxxxx: 0~200V/440V
NE200-4Txxxx: 0~380V/440V NE300-4Txxxx: 0~380V/440V
Overload capacityType G: 150% rated current 1min, 180% rated current 20s
Type P: 120% rated current 1min, 150% rated current 1s

NE200

Voltage rangeVector control with PG(VC)Vector control without PG(SVC)V/F control
Startup torque—-0.5Hz 150%1.5Hz 150%
Speed adjustable range—-1:1001:50
Speed stabilization precision—-± 0.2%± 0.5%
Torque control—-YesN/A
Torque precision—-± 10%—-
Torque response time—-&lt20ms—-

NE300

Voltage rangeVector control with PG(VC)Vector control without PG(SVC)V/F control
Startup torque0.00Hz 180%0.5Hz 150%1.5Hz 150%
Speed adjustable range1:10001:1001:50
Speed stabilization precision± 0.02%± 0.2%± 0.5%
Torque controlYesYesN/A
Torque precision± 5%± 10%—-
Torque response time&lt10ms&lt20ms—-
Key functions

NE200: Torque/speed control mode switching, Multi-function input/ output terminals, under voltage regulation, AC operation grounding switching, torque limit, multi-step operation, slip compensation, PID regulation, simple PLC, current control, manual/ automatic torque boost, current limit, AVR function

NE300: Torque/speed control switching, Multi-function input/ output terminals, under voltage regulation, AC operation grounding switching, flying start, torque limit, multi speed operation, autotune, S curve Acc/ Dec, slip compensation, PID regulation, simple PLC, fix length control, droop control, current control, manual/ automatic torque increase, current limit, AVR function

Frequency setup NE200: Keypad, terminal Up/Down, Communication, Analog input AI1/AI2
NE300: Keypad, terminal Up/Down, communication, Analog input AI1/AI2, Terminal pulse input X4,X5
Output frequency 0.00~550.0Hz
Startup frequency 0.00~60.00Hz
Acc/Dec time 0.01~3600.0s
Dynamic braking 400V drive: braking unit action voltage: 650 ~ 750V;
200V drive: braking unit action voltage: 360 ~ 390V;
DC injection braking DC braking activation frequency: 0.00 ~ 550.0Hz
DC braking current: G type 0.0 ~ 100.0%; P type 0.0 ~ 80.0%
DC braking time: 0.0 ~ 30.0s; Quick DC brake activation without lag time
Magnetic flux braking Fast deceleration through adding motor magnetic flux
Parameter cloning NE200 & NE300: Parameter upload, download. User can forbid the overwriting of the uploaded parameters.
Keypad NE300: LED keypad as standard.
Common DC bus NE300: Common DC bus for multiple drives power supply.
Independent air duct NE300: Independent air duct design for whole series product.
Extension card NE300: IO extension card, injection molding machine connecting card etc.
Power-up detection NE300: Automatic detection of internal and external circuits when power-up.

NE200: Power undervoltage/overvoltage protection, overcurrent protection, IGBT protection, heatsink overheat protection, drive overload protection, motor overload protection, External devices faults protection, output phase-to-phase short-circuit protection, Abnormal power failure in running, power supply trip, output phase loss, EEPROM trip, Analog input trip, communication trip, version compatibility trip, cloning trip, hardware overload protection

NE300: Power undervoltage/overvoltage protection, overcurrent protection, autotune trip, IGBT protection, heatsink overheat protection, drive overload protection, motor overload protection, external device false protection, output to ground short- circuit protection, abnormal power failure in running, power supply abnormal, output phase loss, EEPROM trip, relay contact error, temperature sampling abnormal, encoder off-line, analog input trip, communication trip, version compatibility trip, cloning trip, extension card connection trip, hardware overload protection.

NE300: Operation at rated power: 7.5kW or below≥ 93%; 11kW~45kW≥ 95%; 55kW or above≥ 98%

Application environment Vertical installation in well ventilated cabinet. Horizontal or other installation are forbidden. The cooling medium is air. Free from direct sunlight, dust, corrosive gas, combustible gas, oil mist, steam, and water drop.
Ambient temperature -10~+40°C, deration is required from 40 to 50°C, rated output current decreasing 1% per 1°C temperature higher
Humidity 5~95% without condensation
Altitude 0~2000m, deration is required for more than 1000 meters, at rated output current decreasing 1% per 1 00m higher
Vibration 3.5mm, 2~9Hz; 10 m/s2, 9~200Hz; 15 m/s2, 200~500Hz
Storage temperature -40~+70°C
Protection level IP20
Cooling NE200: Fan air cooling
NE300: Fan force cooling