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Low Harmonic Variable Frequency Drive with THDI

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Low Harmonic Variable Frequency Drive with THDI

Name: Low Harmonic Variable Frequency Drive with THDI
Brand: Inomax
Price: 500 USD

Quality Low Harmonic Variable Frequency Drive with THDI for sale

Model Number : ACS880-B23-05A6-3B

Brand Name : Inomax

Place of Origin : China

Certification : ce

MOQ : 1

Price : $500

Control Mode : Slip Compensation Control, V/F Control, Sensorless Vector Control, Direct Torque Control, Pid Control, Vector Control

Nominal Voltage : 220 V, 380v, 690, 1140

Power Phase : 3

Rated Power : 1.5kw-5000kw

Dimensions : 167.5*185.8*80mm

Power Range : 0.75KW-5000KW

Power Voltage : 220v,230v,240v,380v,400v,440v,480v,500v,520v,600v,660v,690v

Protocol Type : Modbus,CanOpen,Profibus, Profinet,Ethercat,Ethernet

Torque Response : less than 5 ms

Speed Accuracy : less than 0.5%

Frequency Range : 0~1000Hz

Frequency Resolution : 0.01Hz

THDi : <3%

Torque Repeatability : 1%

Speed Response : 0.7%

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acs 880Products Describtion

Low Harmonic Variable Frequency Drive with THDI

ModeL reference	ACS880 abb analog
Product or component type	High performance DTC drive
Product specific application	Complex, Heavy duty,Speed control,Tension control,Position control,Lifting contol,DTC,STO,direction torque control,Safe Torque Off
Power range	0.75KW-5000KW
Power supply voltage	220v,230v,240v,380v,400v,440v,480v,500v,520v,600v,660v,690v
control mode:	DTC control,Vector control
Protocol type:	Modbus,CanOpen,Profibus, Profinet,Ethercat,Ethernet
Warranty:	24 months

acs880 advantages

ACS880 DTC drive 2.2KW-5000KW

1,Really Direct torque control technology ,same as ABB, 2,Almighty can drive any sine wave AC motor including IM / PM / SynRM /Servo motor and so on 3,four-quadrant inverter with energy feedback, save energy and reduce harmonics，the real environment friendly drives. 4,Support Stack Type inverter or Multi-drive modules type inverter 5,Support 380V-690V from 0.75KW-5000KW. 6,Build standar EMC filters,DC reactor as well as braking units. 7,Support Budbus,Profibus,ProfiNET. EtherCAT,Ethernet communication. 8, 2 times torque in zero speed without sensor control, no mechanical lock, smooth switch between driver and brake, to help equipment to realize safer and more convenient operation. 9,Torque response time lower than 5 ms for sensorless applications (0 step to the rated torque).The torque repeatability is 1% . It is equal to the closed-loop vector or dc device.

ACS880 DTC drive 2.2KW-5000KW

10,The speed loop's dynamic response accuracy is 0.7% s. 11,The speed accuracy of the sensorless application is less than 0.5%, and the sensor is not needed in 95% of applications. 12,Leading weak magnetic control technology always adjust the magnetic flflux at its best to minimize motor losses for higher energy savings while reducing motor noise. 13,Intelligent temperature controllable fan, which saves energy and also increases AC drive life time. 14,We have special logic programme function which can help you save the PLC cost for application need to do simple logic programme. 15,Built-in multiple application parameter macros, user friendly and save commission time. More and more you will find after you use it.

ACS880 DTC drive 2.2KW-5000KW

ACS 880 with direct torque control functions and energy saving functions as well as four-quadrant Energy regeneration and feedback function,with in-built filter and reactors,very good performance,maily application for the filed of Steels, Cement, Chemical, Oil & Gas, Power, Polymer & Rubber, Pulp & Paper, Sugar, Minerals & Mining....

Application projects exerence

Metallurgy project experience

The converter steelmaking process of Henan Yaxin Iron and Steel Plant's steelmaking plant is relatively complex, with many detection parameters and frequent equipment movements. The accuracy of process parameter detection and the level of automatic control are directly related to the quality and output of molten steel. To this end, there must be a set of control systems with accurate and timely detection and high level of automatic control in order to stabilize production and meet the needs of enterprise survival and development.

Converter requirements for the AC VFD control system:

(1) The mechanical tilting converter can continuously rotate 360°, driven by 4 sets of 90KW variable frequency motors, and can stop at any position accurately. It should also have speed regulation performance according to process requirements. Its tilting position can have certain interlocking requirements with related equipment such as oxygen lance, ladle car and fume hood; (2) In the process of operation, there must be maximum safety and reliability. When a certain part of the electrical or mechanical failure occurs, the tilting machine should be able to continue to operate for a short time and maintain it until the end of the first steelmaking furnace. (3) The tilting machine should have good flexibility to buffer shock load and torsional vibration generated by starting and braking

Solutions:

Since these 4 motors are rigidly connected, the speeds of all motors are required to be absolutely synchronized, so the transmission of the 4 motors adopts master/slave control, and the data is transmitted between the 4 drives through internal communication. The inverter is used as the host, which adjusts the speed and sets the output torque. Other inverters, as slaves, follow the torque response of the host, and completely solve the "nodding" and "shaking" problem caused by the asynchronous operation of the motor.

-about rolling mill in metallurgy,last year we did one project in a stell plant in henan province last year, it is our regenerative drive application in 20-roll reversible mill project. In total of 4 motors:

1 pcs of 1900kW main winding motor, 2 pcs 2000kW winding motors and one 250kW unwinding motor. The input voltage of our inverter is 690VAC. The rated frequency of the main coiling motor is 18.2hz, the maximum operating frequency is 56.6hz, the rated frequency of the coiling motor is 12.7hz, the maximum operating frequency is 48.2hz, the tension control accuracy is less than 1%, the maximum rolling line speed is 600m/min, and the rated voltage of the motor is 660V. Our design for this project is 5pcs AFE +16pcs SMM inverter.

Mine hoist experience

SIEMAG TECBERG group is a leading supplier of shaft hoisting technology. Siemens is the only supplier for them for the shaft hoisting system. But becasue of the shortage of siemens drives, they try inomax regenerative drive. The main request for the drives is low harmonics and high torque in low frequency.because in order to keep safety environment, the system must work at very low speed in low freqeuncy.this have very high reqeust for VFD.

Introduction of motor test bench project

The electric motor test bench includes 2 motors, one is MUT (Motor under test), the other is DM (Driving motor). During the test,
the controller controls the motor speed and torque. One motor works under motoring mode, the other motor works under generator
mode. The system can realize features: 1.Motor durability and mechanical properties 2.Motor temperature rise and overload
performance 3.Motor field weakening performance and efficiency, power factor 4.Display voltage, current, torque, speed, output power, and efficiency in real time

VFD selection for motor test bench project

1.Power unit To make sure the motor constant torque output, keep DC bus voltage stable, and reduce the interference in the site,
select Inomax AFE (Active front End) as rectifier, Inomax AFE rectifier adopts IGBT to replace diode rectifier, comes standard
with LCL filter, input THDi<5%. When the motor test bench is working, one motor is under motoring mode, the other is regenerative
mode, so can select small power rating rectifier Converter adopts 2pcs power unit, output frequency range is 0~1000Hz, frequency
resolution is 0.01Hz, open loop torque response time is less than 20ms. 2.Control unit The rectifier control unit (RCU) and
inverter control unit (ICU), through drive cable, three modules output uvw at the same time through the reactor and then
concatenate the output to drive a single motor

Advantages of Inomax 4Q regenerative drive for motor test bench

1.Significant energy saving effect The mechanical energy generated by the prime mover is converted into electrical energy and fed back to the grid. 2. Good bidirectional loading characteristics Provides two-way consistent loading capacity to adapt to different steering power mechanical tests. 3. Wide range of speed adaptation Basically, the rated load torque can be provided from zero speed to 5-6 times of field weakening. 4. High torque response speed The torque response speed of the electric dynamometer can reach the ms level, and it is used in the simulated load and new energy industry. 5. Provide anti-drag capability Can be used as a power source, such as mechanical efficiency power drag, generator power drag, one machine for multiple purposes

National key project - Xiangyanghong scientific research ship>=10000m main cable winch drive control

This project is a high-end marine long-line winch,world leading level. Due to the large number of precision electronic equipment used in marine detection, in order to prevent the electromagnetic interference of the equipment and ensure the work of the whole ship, strict requirements are placed on the drive system of the winch, and the expected harmonics are less than 3%.

Traditional frequency converters cannot meet the high-precision coordination of multi-machine torque at this site and extremely low harmonics (conduction and radiation), and the storage system has been occupied by foreign systems. It has undergone multiple rounds of screening through rigorous schemes and technical strengths, and is also based on the experience of independent and controllable excellent drive schemes. , choose INOMAX after fully considering performance indicators, reliability, maintainability, etc.

Inomax VFD for oil filed top drive system

Inomax VFD for oil filed drilling pump system

Production line

Product packaging

FAQ

What is direct torque control?

Semi-Automatic PET Bottle Blowing Machine Bottle Making Machine Bottle Moulding Machine PET Bottle Making Machine is suitable for producing PET plastic containers and bottles in all shapes.

What is the benefit of direct torque control?

* Torque and flux can be changed very fast by changing the references
* High efficiency & low losses - switching losses are minimized because the transistors are switched only when it is needed to keep torque and flux within their hysteresis bands
* The step response has no overshoot
* No dynamic coordinate transforms are needed, all calculations are done in stationary coordinate system
* No separate modulator is needed, the hysteresis control defines the switch control signals directly
* There are no PI current controllers. Thus no tuning of the control is required
* The switching frequency of the transistors is not constant. However, by controlling the width of the tolerance bands the
average switching frequency can be kept roughly at its reference value. This also keeps the current and torque ripple small.Thus the torque and current ripple are of the same magnitude as with vector controlled drives with the same switching frequency.
* Due to the hysteresis control the switching process is random by nature. Thus there are no peaks in the current spectrum. This further means that the audible noise of the machine is low
* The intermediate DC circuit's voltage variation is automatically taken into account in the algorithm (in voltage integration).Thus no problems exist due to dc voltage ripple (aliasing) or dc voltage transients
* Synchronization to rotating machine is straightforward due to the fast control; Just make the torque reference zero and start the inverter. The flux will be identified by the first current pulse
* Digital control equipment has to be very fast in order to be able to prevent the flux and torque from deviating far from the
tolerance bands. Typically the control algorithm has to be performed with 10 - 30 microseconds or shorter intervals. However, the amount of calculations required is small due to the simplicity of the algorithm
* The current measuring devices have to be high quality ones without noise because spikes in the measured signals easily cause erroneous control actions. Further complication is that no low-pass filtering can be used to remove noise because filtering causes delays in the resulting actual values that ruins the hysteresis control
* The stator voltage measurements should have as low offset error as possible in order to keep the flux estimation error down. For this reason the stator voltages are usually estimated from the measured DC intermediate circuit voltage and the transistor control signals
* In higher speeds the method is not sensitive to any motor parameters. However, at low speeds the error in stator resistance used in stator flux estimation becomes critical

What Type Of Motor Is Compatible With Inverters?

Inverter motor type must be a three phase AC induction motor. Preferably, you should use an inverter-grade motor that has 800V insulation for 200V class inverters, or 1600V insulation for 400V class inverters. For motor size, in practice it is much better to find the right size motor for your application; then look for an inverter to match the motor.

What Are Some Of The Common Reasons Why Motors Fail?

The EPRI Power Industry Study by General Electric in 1985 offered the following causes based on 6,000 utility motor failures: 41% were bearing related, 37% were stator related, 10% were rotor related and 12% were other causes.

How do you select a VFD?

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