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Regenerative 250KW 280KW Variable Frequency Drive with Direct Torque Control for High-Speed Applications

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Regenerative 250KW 280KW Variable Frequency Drive with Direct Torque Control for High-Speed Applications

Products Description
ACS 880 regeneration drive/direct torque control drive
Inomax ACS880 variable frequency drive with same software and similar hardware than ABB ,also 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....
Product Technical Instructions
Applications
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.
ACS880 DTC drive 2.2KW-5000KW
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.
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.
ACS880 DTC drive 2.2KW-5000KW
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....
Production line
FAQ

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?

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.
Product Tags:

Regenerative Variable Frequency Drive

  

250KW AC Inverter

  

280KW VFD

  
Quality Regenerative 250KW 280KW Variable Frequency Drive with Direct Torque Control for High-Speed Applications for sale

Regenerative 250KW 280KW Variable Frequency Drive with Direct Torque Control for High-Speed Applications

Company Info.
Shenzhen Inomax Technology Co., Ltd.
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