Medium voltage vfd
 

Medium-voltage vfd are widely used in which the fields of electric power, iron and steel, petroleum, mining, chemical, cement, automobiles, and utilities.


Feature:
1. Substantial reduction of harmonic current on power source side
SD3200 suppresses the harmonics by using a multi-pulse diode rectification system (12 to 60 pulses),thereby substantially reducing the generation of harmonics in comparison with previous models. The harmonic generation level stipulated in IEEE 519 (1992) is satisfied. This inverter is ideal for power sources.




2. Total inverter effi ciency as high as approximate 97%
a). Because an output transformer is unnecessary, inherent losses are eliminated.
b). Multi-level PWM control minimizes switching loss.
c). Because the harmonic current on the power source side is reduced, the primary winding of the input transformer
has a reduced harmonic losses.
Total inverter efficiency curve (including input transformer)
 
3. Source power factor as high as 95% or more
a). Due to full-wave rectifi cation with multi-phase diodes,operation is allowed with the source power factor (power factor on power source side) set at a high level.
b). A phase advancing capacitor and a DC reactor for improving the source power factor are unnecessary.
c). A smaller power capacity suffices for inverter operation.
4. High-reliability
a) . Higher equipment reliability is achieved by reducing the number of inverter cells by using a single-phase,3-level inverter, etc..
b).  Stable operation is maintained despite load fluctuations, by the simple sensor-less vector control function.
c).  The control device has a 32-bit MPU for quick response and high-accuracy.
5. Vector control
 Vector control with a speed sensor is available (as an option) for equipment having high speed and torque accuracy requirements. (option)
6. Easy maintenance
a). The inverter is air-cooled, requiring no cooling water.
b). Start/stop operation, parameter setting, fault display and data monitoring are performed on the touch panel with simple loader functions.
c). Simple, built-in auto-tuning functions facilitate testing and adjustment.
d). Fault diagnoses are easily performed.
e). A dry-type input transformer is adopted. 

It has several advantages as following:
* Three-level drive technology, lower output harmonics, waveform closer to sine wave, lower motor heating, longer motor workinglife
*High performance for driving permanent magnet synchronous motor and AC asynchronous motor
* Compatible with 6 pulse, 12 pulse, 18 pulse, 24 pulse, multiple voltage input modes, allowing grid voltage range from 85% to 115%
* V/f control and high-performance vector control can be provided to achieve two-quadrant and four-quadrant operation, saving energy and reducing consumption;
* The larger starting torque to easy move the load, soft start and soft stop to eliminate the mechanical and electrical impact, to extend the service life of the equipment; 150% starting torque is available when 1Hz reaching.
* With CAN, Rs485 and other communication interfaces, it can realize communication with the host computer, realize the centralized control operation of multiple devices, and transfer the operation data to the ground dispatching room for remote supervision.
* Multi-channel digital, analog I/O interface
* Compatible with European control mode; capable of master-slave control of multi-machine dragging device
* Power balance during runing (no need to install encoder) and synchronous speed driving
* It has perfect protection functions such as overcurrent, overload, short circuit, phase loss, leakage lockout, overvoltage, undervoltage, overheating and other protection functions.
 
The main advantages of the three-level inverter:
1) Simple structure and small size;
2) Compared with the two levels, the device can achieve 2 times the voltage output with the same voltage level;
3) Reduce the common mode voltage of the motor;
4) Reduce common mode interference to the power grid;
5) It is convenient to realize the two-way flow of energy and the four-quadrant operation of the motor;
6) The output du/dt is reduced by half compared to the two levels;
7) Compared with the two levels, the number of phase voltage output levels increases and the output harmonics decrease.
 

Technical specification 

Technical specification 

Items		Specification
Control  mode	Control mode	V/F control	Sensorless Vector     control 1	Sensorless Vector     control 2	Close loop vector control
	Starting torque	1Hz 150%	0.5Hz 150%	0.25Hz 150%	180% under 0Hz
	Speed adjust range	**	1:50	1:200	1:500
	speed stabilizing precision	±0.1%	±0.3%	±0.05%	±0.02%
	Torque precision	NO	NO	Yes	Yes
	Motor type	General induction motor，permanent magnet synchronous motor (PMSM)
Function    design	Output volage	3 electric level with low harmonic
	Highest frequency	General vector control :400Hz  V/f control：4000Hz
	frequency resolution	Digital setting: 0.01Hz  analog setting: maximum×0.025%
	carrier frequency	0.5K～16KHz, the carrier frequency can be adjust by temperature automatically
	Frequency reference  setting method	Digital of Control panel, analog AI1, AI2, potentionmeter of control panel, UP/DN control, communication, PLC pulse frequency
	Accel./decel. characteristic	Linear curve and S curve accel. /decel. mode, range of time: 0.0 to 65000S.
	V/F curve	3 mode: linear, multiple points, N Power
	V/F separation	2 times separation: totally separation, half separation
	DC braking	DC braking frequency: 0.0 to 300Hz, DC braking current: 0.0% to 100%
	Braking unit	Built in braking unit up to 15kw, optional is 18.5kw to 75kw, external built in for  above 93kw.
	Jog function	Job frequency range: 0.0 to 50.0Hz, the accel. and decel. time of Jog
	Configuration PID	Easy to perform pressure, flow, temperature close loop control
	PLC  multiple speed	To achieve 16 segment speed running through built in PLC or terminal control
	Common Dc bus *	Multiple inverters use one DC bus for energy balance.
	Auto voltage regulation (AVR)	Enable to keep output voltage constant when grid fluctuation
	Over load tolerance capability	G type model: 150% rated current for 60s, 180% rated current for 2s, P type Model: 120% rated current for 60s, 150% rated current for 3s.
	stall control when over  current, over voltage	Carry out limiting automation for running current, voltage to prevent over current  over voltage frequently
	Fast current limit function	minimize the IGBT module broken to protect the inverter, maximum reduce the  over current fault.
	Torque limit and torque  control	"Excavator" characteristics , torque limit automatically during motor running.  Torque control is available in close loop vector control mode.

 

Items		Specification
features	friendly interface	Display Hello when power on.
	Multiple function key MK .F  button	It can set for Forward Jog, reverse Jog, forward/reverse switch
	Timing control function	A total running time and total running time calculating
	Motor over heat  protection	Accepting motor temperature sensor signal input via AI1 terminals.
	Command source	Control panel, control terminals, series communication, switch freely.
	Frequency source	Digital setting, analog current/voltage, pulse setting, serial communication, main  and auxiliary combination.
	Protection function	Short circuit detect after power on, input/output phase missing, over voltage, over current, under voltage, over heat, over load protection.
Environment	Application site	Indoor, free of exposure to sunlight, no dusty, no corrosive, no inflammable gas,  no oil and water vapor, and water dipping
	Altitude	Lower 1000m
	environment temperature	-10℃～+40℃, power derated for 40～50℃, rated current derated 1% for 1℃increasing.
	Humidity	Less than 95%, no water condense.
	Storage	-40～+70℃

Wiring
Multiple digital input, 2 analog input
2 analog output, 2 relay output,
Rs485 and CAN bus interface



Model list
SD3000-37G-T11-ASDA
SD3000 stand for products name
37G stand for rated of power, 37kw
T11 stand for input voltage range, T6: 3PH, 660VAC input, T11: 3PH, 1140VAC, T33: 3PH 3300VAC
ASDA stand for function description,
 

SD3000 series 1140V VFD model list
Series	Model list	Rated Power (kw)	Input current  (A)	Output current (A)	Input reactor	DC Reactor	Output Reactor
1	SD3000-37G-T11-ASDA	37	20	23		7.3mh/ 25A	1mh/25A
2	SD3000-45G-T11-ASDA	45	26	28		5.6mh/ 32A	0.8mh/28A
3	SD3000-55G-T11-ASDA	55	34	36		4.2mh/ 42A	0.62mh/36A
4	SD3000-75G-T11-ASDA	55	47	50		3mh/ 58A	0.45mh/50A
5	SD3000-90G-T11-ASDA	90	56	60		2.6mh/ 69A	0.38mh/60A
6	SD3000-110G-T11-ASDA	110	68	73		2.2mh/ 85A	0.3mh/73A
7	SD3000-132G-T11-ASDA	132	82	85		1.78mh/100A	0.26mh/85A
8	SD3000-160G-T11-ASDA	160	98	104		1.5mh/ 120A	0.22mh/104A
9	SD3000-200G-T11-ASDA	200	122	128		1.2mh/ 150A	170mh/128A
10	SD3000-250G-T11-ASDA	250	150	160		0.97mh/ 185A	140mh/160A
11	SD3000-315G-T11-ASDA	315	185	195		0.79mh/ 230A	115mh/195A
12	SD3000-400G-T11-ASDA	400	235	250		0.62mh/ 285A	90mh/250A
13	SD3000-500G-T11-ASDA	500	300	310		0.5mh/ 370A	72mh/310A
14	SD3000-560G-T11-ASDA	560	355	350	0.22mh/ 355A		64mh/350A
15	SD3000-630G-T11-ASDA	630	380	395	0.19mh/ 380A		57mh/395A
16	SD3000-710G-T11-ASDA	710	430	450	0.17mh/ 430A		50mh/450A
17	SD3000-800G-T11-ASDA	800	480	500	0.15mh/ 480A		45mh/500A
18	SD3000-1000G-T11-ASDA	1000	600	520	0.12mh/ 600A		36mh/620A
SD3000 series 3300V VFD model list
Series	Model list	Rated Power	Input current	Output current	Input reactor	Output Reactor
1	SD3000-800G-T33-ASDA	800	166	173	1.2mH/170A	0.6h/180A
2	SD3000-1000G-T33-ASDA	1000	208	216	1mH/210A	0.48h/220A
3	SD3000-1250G-T33-ASDA	1250	259	270	0.8mH/260A	0.39h/270A
4	SD3000-1500G-T33-ASDA	1500	311	324	0.67mH/320A	0.32h/320A
5	SD3000-2000G-T33-ASDA	2000	415	433	0.5mH/420A	0.24h/420A
6	SD3000-3000G-T33-ASDA	3000	623	649	0.34mH/630A	0.16h/630A
SD3000 series 660V VFD model list
Series	Model list	Rated Power (KW)	Input current  (A)	Output current (A)	Input reactor	Output Reactor
1	SD3000-1000G-T66-ASDA	1000	91	95	4mH/100A	2mH/100A
2	SD3000-1500G-T66-ASDA	1500	114	119	3.3mH/120A	1.6mH/120A
3	SD3000-2000G-T66-ASDA	2000	143	149	2.7mH/150A	1.3mH/150A
4	SD3000-2500G-T66-ASDA	2500	171	178	2.2mH/180A	1mH/180A
5	SD3000-3000G-T66-ASDA	3000	228	238	1.7mH/240A	0.8mH/240A
6	SD3000-5000G-T66-ASDA	5000	342	357	1.1mH/360A	0.6mH/360A

 Application.
Construction Materials                         
< Kiln head cooling fans
< Kiln tail heating fans
< Grinders
< Cement rotary kilns


Petrochemical Mining
< Catalytic cracking unit
< Hydrogenation compressor
< Oil and gas transmission device
< Blowers/pumps/pelletizer


Mining
< Belt conveyers
< Grinders
< Mine air circulation blowers


Iron and steel
< Blast fumace blowers
< Primary/secondary dust blowers
< Dry quenched coke circulation blower
< High-pressure phosphorus ejector pump
< Blowers/water pumps
< Crusher


Electric power
< Induced draft fan/forced draught fan
< Primary/secondary blowers 
< Condensation pumps
< Recirculation pumps
< Feed pumps


Others
< Water conservancy, utilities (pumps)  
< Sugaring (mill)
< Test crew
< Internal mixer

 
 
 

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