Axpert-i-Sine Series Active Front-end Converter
“Power Quality Improvement & Regenerative Unit”
Active Front-end Converter is an IGBT based AC to DC converter. It keeps supply side power factor to unity and supply current sinusoidal. Our Axpert-i-Sine Series AFC is also capable of feeding back the excessive power from DC link capacitor to grid side and so it is also popularly known as Regenerative Unit. A single unit of high capacity can also be used for multiple VFD (Variable Frequency Drive) of low capacity having common DC bus configuration.
Six pulse diode rectifier bridge is a basic building block of many products such as UPS, battery chargers, VFDs, DC drives etc., known as non-linear loads. They generate about 70…120% current harmonic distortion at the input depending upon the source impedance. AFC reduces current harmonic distortion level to <5%. It is a high quality product and easily meets the international power quality standards such as IEEE 519-2014.
Wherever there is a 6-pulse rectifier at the input of variable frequency drive, UPS or there is a 6- pulse rectifier supplying the common DC link to which number of variable frequency drives are connected, the input harmonic distortion of current is from 40 to 100% depending upon the source impedance. Due to presence of harmonics the effective power factor (which is a product of displacement factor and distortion factor) is less (of the order of 0.8). If variable frequency drives has regenerative load like centrifuge or lift, lot of power is dissipated in dynamic braking resistor across the DC link. Active Front-end converter (AFC) can take care of these three problems in totality due to its capacity to work in four quadrants.
- It reduces the total harmonic distortion of input current to less than 5%.
- It can improve the input power factor up to unity.
- It can feed back the regenerative power to mains so that energy can be conserved.
- Stabilizes the output D.C. voltage against mains and load fluctuations.
- Compatible with any VFD, useful in common DC applications
| Power Source | Input | 440, 460, 480 VAC, 3-Phase, 3-Wire, 60Hz | |||
| Voltage +5 %,-10 %, Frequency ±5 % | |||||
| Output | DC 660/690/720 VDC, +2 % (Source input voltage 440/460/480 VAC) | ||||
| Control Functions* | Control mode | Constant Voltage | |||
| Control method | Hysteresis current control | ||||
| Input current distortion (% THD) | Less than 5 % (at 100 % load) | ||||
| Power Factor | 0.99 (at 100 % load & nominal voltage) More than 0.95 (at load of more than 30 %) | ||||
| Regeneration mode | Yes (Automatic) | ||||
| Max. Switching Frequency | 5 kHz | ||||
| Efficiency | Approx. 98 % | ||||
| Operation Specifications | Digital inputs | 5-Programmable sequence inputs, sink / source and Active Close / Active Open selectable | |||
| Digital outputs | 4-Programmable sequence outputs, open collector type | ||||
| Potential free contacts | 3-programmable relays: | 1-NO, 1-NC for 5 A @ 240 Vac | |||
| Programmable between 12 different options | |||||
| Programmable analog outputs | 2-Programmable analog outputs AO1 & AO2: Voltage (0…10 V) and current (4…20 mA) selectable using jumper | ||||
| Soft-charge | Through resistor within 5 sec. | ||||
| Auto start | Yes, AFC can start at power ON condition in local and serial mode. | ||||
| Auto restart | Adjustable up to ten times for fault like Over current fault, Timed over current fault, Adjustable over current fault, DC bus over voltage fault, DC bus under voltage fault, Earth fault, Temperature fault, External fault, R-Phase Temp Fault, Y- Phase Temp Fault, B-Phase Temp Fault. | ||||
| Display Indications | Display and Keypad module | Digital Operation Panel 128 x 64 Graphical LCD with white back light LED, 8-Key keypad, 3-Status indicating LED for Run, Stop and Fault; Real Time Clock. | |||
| VL-L, THDi, THDv, Line Frequency, DC bus voltage, PF, DPF, kW, kWH import, kWH export, kWH net, kVA, kVAR, Source side current for each phase | |||||
| Communication | Network connectivity | RS-485 for PC interface with Modbus-RTU protocol and Wi-Fi connectivity as standard (DeviceNet, Profibus DP (Slave), CANopen, Ethernet, ControlNet are optional) | |||
| Protective Specifications | Protective Function | Over current | Phase loss | ||
| Adjustable over current | Ground fault | ||||
| Timed over current | External fault | ||||
| DC bus over voltage | Charging fault | ||||
| DC bus under voltage | EEPROM fault | ||||
| Over temperature | |||||
| Fault History | Last 20 faults with status at time fault occurred stored in memory | ||||
| Electronic Thermal Overload | 120 % Overload for 60 Seconds | ||||
| Environment | Installation location | Indoor | |||
| Type of cooling | Forced Air Cooling | ||||
| Ambient temperature | 5…113 °F (-15…45 °C) | ||||
| Storage temperature | -4…158 °F (-20…70 °C) | ||||
| Audible noise | ≤ 72 dB @ 3 ft (1.0 m) | ||||
| Altitude (above sea level) | 3300 ft (1000 m) w/o derate, (derate 1 % per 330 ft (100 m) above 3300 ft (1000 m) | ||||
| Model derating with temperature | Above 113 °F (45 °C), derate the output current by 1.8 °F (3 % / 1 °C) maximum up to 131 °F (55 °C) temperature | ||||
| Relative humidity | 0…95 % max non condensing | ||||
| Mechanical Specifications | Color | RAL 7035 | |||
| Protection class | IP 00 | IP 31 | |||
| consult Amtech for higher protection requirements | |||||
| Installation | Wall mounting | Floor mounting (Above 55 kVA model) | |||
| Reference standard | Harmonic | IEEE 519-2014, G5/4-1, GB/T 14549-93, IEC 61000-3-2, IEC 61000-3-4, IEC 61000-3-12 | |||
| Safety | IEC 50178 | ||||
| Input voltage range 440…480 V | ||||
| Model | Rated Capacity | Rated current | Short time current for 60 Seconds | Applicable VFD capacity |
| kVA | A | A | HP | |
| AMT-AFC-018-4 | 22 | 30 | 36 | 25 |
| AMT-AFC-022-4 | 25 | 35 | 42 | 30 |
| AMT-AFC-030-4 | 36 | 50 | 60 | 40 |
| AMT-AFC-037-4 | 43 | 60 | 72 | 50 |
| AMT-AFC-045-4 | 50 | 70 | 84 | 60 |
| AMT-AFC-055-4 | 61 | 85 | 102 | 75 |
| AMT-AFC-075-4 | 83 | 115 | 138 | 100 |
| AMT-AFC-090-4 | 101 | 140 | 168 | 125 |
| AMT-AFC-110-4 | 122 | 170 | 204 | 150 |
| AMT-AFC-132-4 | 144 | 200 | 240 | 200 |
| AMT-AFC-160-4 | 176 | 245 | 294 | 250 |
| AMT-AFC-200-4 | 219 | 305 | 366 | 300 |
| AMT-AFC-250-4 | 273 | 380 | 456 | 400 |
| AMT-AFC-315-4 | 341 | 475 | 570 | 450 |
| AMT-AFC-355-4 | 388 | 486 | 648 | 500 |
| AMT-AFC-400-4 | 438 | 548 | 732 | 550 |
| AMT-AFC-450-4 | 492 | 616 | 822 | 600 |
| AMT-AFC-500-4 | 546 | 685 | 912 | 700 |
| Model | Dimensions in inch (mm) | Weight in kg / lb | ||
| H | W | D | ||
| AMT-AFC-018-4 | 35.4 (900) | 12.2 (310) | 14.2 (360) | 50 / 110 |
| AMT-AFC-022-4 | 35.4 (900) | 12.2 (310) | 14.2 (360) | 52 / 114 |
| AMT-AFC-030-4 | 35.4 (900) | 12.2 (310) | 14.2 (360) | 55 / 121 |
| AMT-AFC-037-4 | 35.4 (900) | 12.2 (310) | 14.2 (360) | 55 / 121 |
| AMT-AFC-045-4 | 35.4 (900) | 12.2 (310) | 14.2 (360) | 60 / 132.2 |
| AMT-AFC-055-4 | 35.4 (900) | 12.2 (310) | 14.2 (360) | 65 / 143.3 |
| AMT-AFC-075-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 195 / 430 |
| AMT-AFC-090-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 210 / 463 |
| AMT-AFC-110-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 225 / 496 |
| AMT-AFC-132-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 250 / 551 |
| AMT-AFC-160-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 300 / 661 |
| AMT-AFC-200-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 335 / 738.5 |
| AMT-AFC-250-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 360 / 793.7 |
| AMT-AFC-315-4 | 78.5 (1995) | 23.6 (600) | 23.6 (600) | 410 / 903.9 |
| AMT-AFC-355-4 | * | * | * | * |
| AMT-AFC-400-4 | * | * | * | * |
| AMT-AFC-450-4 | * | * | * | * |
| AMT-AFC-500-4 | * | * | * | * |
| *Consult AMTECH or nearest dealer for the weight and dimension above AMT-AFC-315-4 | ||||
Note: Panel plinth height is not included in above dimension for floor mounted units. Standard plinth height is 100 mm.
Power and control circuit overview
Amtech's Axpert-i-Sine Series Active Front-end Converter (AFC) offers all these advantages and can serve many applications such as:
- Countermeasure for power source harmonic wave
- Water & drainage works, cable car, lift, blower etc.
- Power source regeneration
- Kinds of tester, crane, elevator, centrifugal separator, line drives etc.
- Common DC link converter
- Kinds of line drive, rotary press of news papers etc.
- Roller tables
- Test jigs for dynamometers, gears and motor test benches