PCHVA series high voltage multilevel inverter 6 kV, 10 kV
PCHVA series medium voltage variable frequency drive 3 kV, 3.3 kV, 6 kV, 6.6 kV, 10 kV
The PCHVA series medium voltage variable frequency drive designed and manufactured by Advanced Electric Systems LLC has prominent performance and high reliability with low cost. It is of AC-DC-AC voltage type inverter with main loop of multi-level topology circuit. The control mode adopts SPWM technology. And the input uses isolated transformer of multiple technology, while the output is fulfilled by the solution of phase-shifting tandem multi-unit and medium voltage to medium voltage direct conversion.
Many years of technical experience enabled Advanced Electric Systems LLC. and its staff to have developed inverters with low harmonic content, which is in a leading level in domestic. Perfect output voltage sine wave provides the inverter with stability of motor's operation during the whole speed regulation range. The low input current harmonics almost has no any disturbance to the grid and this ensures the operation reliability of the surrounding electric equipments.
This series inverter can drive and regulate the medium voltage motor in almost all kinds of application area. The speed regulation is smooth, and the efficiency and power factor is enviable. In particular, nowadays the world is in short of energy. PCHVA inverter can bring great economic effect when used for blowers and pumps.
This series inverter consists of three main parts, transformer cabinet is on the left, and power unit cabinet is in the middle, while control cabinet is on the right. To improve the stability of the control circuit and to make the debugging more convenient, the control cabinet door was put on the right of the machine. This series product adopts cabinet structure with forced air cooling. And the big capacity machine adopts the cooling mode of water-cooled, air-closed circulation. The wiring terminal of input and output of the complete machine was placed on the lower left back. It is easy for connection
PCHVA medium voltage variable frequency drive has been widely used for the medium voltage motor's speed regulation, energy saving, soft starting and intelligent control in the area of power supply, iron and steel, HVAC, oil, construction, mine and etc.
*Heat power station: Coal grinding machine, blower, draught fan, dust exhaust fan, circulating pump, water-feeding pump.
*Iron and steel plant, metallurgical plant: Water-feeding pump, dust exhaust fan, draught fan, oxygenator.
*Mine: Slurry pump, ventilator.
*Oil: Water injection pump, oil pump.
*Chemical plant: Compressor, blower, circulating pump.
*draw off pump, supply pump, purifying pump, sewage pump in urban power supply and sewage disposal:
*The grinder, pump, draught fan, dust fan, supply blower in cement plant and ceramic plant
*others: The blower for medicine, paper making, food
*Years of accumulative technology of high-power drive increases the product's power supply to be 8000kw.
Unique low-induction bus structure ensures stable operation of the power unit.
Distinctive cooling design and components layout enable the inverter to work more reliably.
*Non-disturbance switch between grid frequency and inverted frequency makes sure that the equipments can work uninterruptedly.
Technical specification of PCHVA series frequency inverter mentioned below
0~10 V, 4~20 mA voltage, current and frequency optional (3 channels) output is for 5 variables
0~5 V, 4~20 mA (2 ports)
Isolation RS485 interface
Overcurrent, overload, short-circuit, 3-phase current imbalance, transient power failure, input/output phase loss, overvoltage, undervoltage, body overheat, shutdown caused by external fault, automatic bypass of power unit
Operation environment temperature
0°C ~ + 40°C
Storage and transport temperature
-40°C ~ +70°C
Compulsory air cooling
< 90% (no condensate)
< 1,000 m
Below is an example PCHVA-M-600-T60 UKhL.4 shows the structure of designation of the frequency inverter:
Medium voltage PCHV
Type of motor A
Type of PWM conversion М
Rated output current 600
Rated output voltage T60
6000 V 3-phase
Placement category UKhL.4
Block diagram of PCHVA
Functional diagram of the PCHVA power cell
The power cell consists of a power input fuse R, S, T, three-phase bridge rectifier, capacitor filter, one-phase inverter Q1-Q4, the bypass consists of a single-phase rectifier and K thyristor, the output terminals of the power cell are L1, L2.
Curves of output voltage and current of the PCHVA medium voltage variable frequency drive