Static Voltage Stabilizer is an IGBT based PWM type buck-boost voltage stabilizer which has tight regulation and fast correction speed which is impossible to obtain using conventional methods such as servo voltage stabilizers, SCR / triac type stabilizer, relay type stabilizer etc.
This is an SMPS type voltage stabilizer for mains voltage (AC input and AC output). This is a new switching topology where PWM is made directly in AC-to-AC switching, without any harmonic distortion. In this topology there is no need to convert the AC input to DC and again convert it back to regulated AC output. This simplifies the design, reduces the component count and improves the efficiency and reliability. The power stage is an IGBT chopper control. The chopping frequency is around 20KHz which ensures absolutely silent operation and pure sine wave output (no waveform distortion).
The control section is based on dsPIC controller which ensures quick correction of output which is not possible in conventional relay type stabilizer or servo controlled stabilizers. The circuit is having LCD for display which will show all parameters like: input voltage, output voltage, connected load, etc.
Since the circuit is fully solid state (no mechanical or moving parts) there will not be any wear and tear like the brush tear in servo stabilizer or relay degrading in relay based stabilizer.
This is specially useful in places where we need very fast correction speed, constant output voltage, overload current limiting and short circuit protection, soft start, high voltage cut-off and low voltage cut-off, automatic bypass, no wear and tear, long life and maintenance free which is impossible with other conventional relay type or servo control stabilizers.
WORKING In this IGBT based PWM type static voltage stabilizer only the difference voltage is switched through IGBT and will be added or subtracted from the mains. This is done electronically without any step changing in voltage which occurs when the system regulates. This is achieved by a feedback control system using digital signal processor (DSP). The output voltage is sensed by the DSP and corrections are made by varying the duty cycle of the PWM.
This stabilizer boosts up the voltage if it is low and bucks the voltage if it is high.
For example - If the AC input is 200V and the AC output is set for 220V, only 20V will be regulated through the IGBT and will be added to the original mains source which is 200V. If the AC input is 195V, then 25V will be added....
The efficiency in worst case will also be above 97%. This stabilizer is ideal for mobile towers, CNC machines, medical equipment, textile industries, power plants and any industrial product that needs tight regulation and fast correction. We can also use this for Air Conditioners, refrigerators, motor, pump etc
Highlights of QUIKorrect are -
The unique feature of this stabilizer is its correction speed which is very fast. If there is any change in the input voltage, it will be corrected i n the very next cycle.
As we can see in the above waveform, input voltage (channel 1 –yellow) is dragged down from high voltage to low voltage within 0.2sec, but the output voltage (channel 2 –blue) remains steady.
Category | Feature | Three Phase Model | ||||||
Electrical | Capacity in KVA (KW) | 20 KVA | 30 KVA | 40 KVA | 50 KVA | 60 KVA | 80 KVA | 100 KVA |
Regulator | High frequency 20 khz IGBT driven voltage regulation converter | |||||||
Input | Nominal Voltage | Nominal Voltage volts ac, three phase | ||||||
Normal operating voltage (Topical output within +1- 1% of nominal) | 340 - 480 volts ac for full regulation | |||||||
Relaxed operating voltage (relaxed output regulation within functional range of 200-250V P-N) | 300 - 490 volts ac within maximum rated input current capacity | |||||||
Nominal Frequency | 47 - 63 Hz | |||||||
Output | *nominal voltage | 415 Volts, Three Phase | ||||||
Power Efficiency | Typically over 97% (with 20-100% load conditions) | |||||||
Voltage regulation | +/- 1% | |||||||
Maximum rated output current | 27 A | 40 A | 54 A | 67 A | 80 A | 107 A | 134 A | |
Physical | Dimensions (IN MM) | 500 X 560 X 840 | 700 X 720 X 1000 | |||||
20X4 LCD Display | Digital Input, Output voltage & Load Current display | |||||||
Mounting | 4 High Quality Castor wheels | |||||||
Envionmental | ambient temperature | 0° to +45° Centigrade (32° to 113° Farhenite). 10 to 90% RH non condensing | ||||||
Cooling Method | Fan Coiled & Air Coolled | |||||||
Proactive Features | OV/UV cut off with SPP | Automatic trip in event of High / Low / Missing Voltage, Auto reset | ||||||
Overload & Short Circuit Protection | Through suitable rated input circuit braker & Output By Contactor | |||||||
Soft Switch-On | This feature ensure that output voltage is never higher than input voltage upon switch-on, before it commences full stabilization. | |||||||
Automatic Bypass | Automatic Bypass will be activated when there is a fault condition | |||||||
Surge Protection | By Input & Output Filter Card | |||||||
Note | All * marked voltage regulation ranges are based on 415V nominal output voltage. They would proportionately change in case nominal output voltage is required to be present at any other value between 380-415V. |