Dlhvf Series of High Voltage Frequency Converter (inverter) Speed Regulator
|FOB Price:||US $48,000-319,385 / Piece|
|Min. Order:||1 Piece|
|Min. Order||FOB Price|
|1 Piece||US $48,000-319,385/ Piece|
|Production Capacity:||500 PCS/Year|
|Payment Terms:||L/C, T/T, Western Union, Money Gram|
- Variable Frequency Drive
- 4 Products
- Product Image
- Product Name
- FOB Price
- Payment Terms
- Product Package
- Product Attribute
- Product Table
- Model NO.: DLHVF
- Output Type: Triple
- Switch Mode: High Carrier Frequency PWM Control
- Voltage of Power Supply: High Voltage Variable-Frequency Drive
- Nature of DC Power: Voltage Variable-Frequency Drive
- Brand: Big Pawer
- Trademark: Big Pawer
- Specification: CE, SGS
- HS Code: 94019019
- Application: High-performance Transducer, Three Phase Transducer, General Transducer, Single-phase Transducer, High Frequency Converter Transducer
- Principle of Work: PLC Control
- Main Circuit Type: Voltage
- Link of Transformation: AC-AC Variable-Frequency Drive
- Function: Constant Torque Universal Type
- Size: in Following Diagram
- Transport Package: Wooden Case
- Origin: Xiangyang, Hubei Province
- Product introduction
2. applicable industry
The device is suitable for:
Cement industry: main dust absorption fan, kiln induced draft fan, kiln air supply fan, preheat tower fan, cooler exhaust fan, cooler dust absorption fan, pressure blower, raw material grinding blower, classifier fan.
Metallurgy/mining industry: ventilation fan, dust absorption fan, induced draft fan, descaling pump, slurry pump.
Oil/chemistry: main pipe pump, water injection pump, mixer, brine pump, boiler water supply pump, oil-submerged pump, air compressor, blower, extruder.
Electrical industry: dust absorption fan, induced draft fan, blower, boiler water supply pump, slurry pump, compressor.
Water supply industry: priming pump, water delivery pump.
Waste water treatment: waste water pump, purification pump, clean water pump.
Pharmacy industry: scavenging pump.
Papermaking/sugaring industry: beating machine.
Coal-mining industry: ventilation fan, lifter.
- Technical features
3.2 High efficiency: efficiency of DLHVF DLHVF speed regulation device is more than 96% ;
3.3 High power factor: power factor of DLHVF DLHVF speed regulation device can surpass 0.95;
3.4 No harmonic input:DLHVF DLHVF speed regulation device adopts phase shifting multi-recitification technology to decrease voltage and current harmonic, no harmonic suppression device is needed for input, no pollution to power grid;
3.5 No harmonic output: DLHVF DLHVF speed regulation device output standard sine wave current, small voltage and current harmonic, no harmonic suppression device is needed for output, no operation noise adding to motor, no additional stress generated;
3.6 High reliability: DLHVF DLHVF speed regulation device has fault-auto-bypass and high voltage power failure restart functions, to ensure the fault motor operation without stop;
3.7 High reliability: DLHVF DLHVF speed regulation device's design is according to high voltage national mandatory standard. High voltage main circuit and control circuit is connect via optic fibre. It is safe and reliable.
3.8 Perfect protection and alarm design: DLHVF DLHVF speed regulation device has perfect system and power units protection function. After protection action it can automatically record the fault and accident. The fault record can automatically record all kinds of protection action type, action time to help technicians analyze the fault cause and locate the fault;
3.9 High flexibility: DLHVF DLHVF speed regulation device realize site control by PLC. The control mode can be changed by changing man-machine interface parameters flexibly. Various standard communication protocols are available for communication with central control system.
3.10 Installation and maintenance: withdrawable power units design, connected with external connection wire by plug-connector, no manual wiring needed. Good interchangeability and convenient to change.
- Unique technical features
4.1 Waveform digital direct adaptive synthesis technology:
Waveform generating part of DLHVF DLHVF is discretized frequency and amplitude controlable monolithic FPGA 3 phase waveform data. Waveform generating part of DLHVF is discretization frequency and amplitude all controllable 3 phase waveform data from certain algorithm calculated by single chip FPGA. Then compare to triangular carrier wave phase in different phase, generates waveform digital signal to control power units in same phase output fundamental voltage with same amplitude and phase position. But the carrier wave of serial connected all units staggers certain electrical angle, to realize multi-level overlay wavefrom which increases the reliability of whole control system significantly.
4.2 Low voltage whole system commissioning function:
DLHVF can do function test to DLHVF with low voltage control power supply. User can repair or do commissioning to frequency converting device without HV power supply or during motor power frequency operation. In this way the repair and commissioning time of DLHVF device can be significantly reduced.
4.3 Advanced auto-fault-detection technology:
DLHVF will automatically do on-circuit check to whole system and each power unit before each start. For power unit it can check performance of each IGBT to ensure the whole device is in good condition.
4.4 Withdrawable power unit:
Power units and main circuits of DLHVF are connected via dynamic and static contact. For disassembly user only need to take down two optic fibers instead of disassembling bolts of main circuits. All contacts of main circuits are in back side of cabinets. It ensures the personal safety of operators.
4.5 On circuit switch power units:
During normal operation DLHVF can manually inject or bypass any power unit. So that if one power unit is mistakenly bypassed it can be manually inject to normal operation again. Most faults of HV frequency conversion are caused by disturbances. This function will significantly increase the mean time between failures and reliability of DLHVF.
4.6 Power unit DC voltage on circuit test:
DLHVF will test DC busbar voltage of each power unit and display the measured value in man-machine interface in HV live condition. So that the operator will intuitively understand the working condition of each power unit's main circuit. It provides strong assurance to further analysis.
4.7 Power unit soft bypass function:
DLHVF will ensure the reliability of power unit auto-bypass by adopting combination of mechanical bypass and electrical bypass technology in case the power unit fault occurs.
4.8 Instant torque control function:
In load mutation case, DLHVF can realize instant torque control to avoid overcurrent or quick-break trip, and to increase the reliability of device operation.
4.9 Frequency converting soft start control technology:
Low starting current in frequency converting starting. No starting tries limit.User can switch to power frequency after starting without disturbance. No current impact during starting.
4.10 Motor rotate restart control technology:
In case the motor in stall rotation condition, DLHVF can recognize motor speed automatically and then access without disturbance, to drive the motor to frequency conversion condition.
- Technical parameters
6kV series structure diagram
Normally there are 15 power modules and every 5 power modules is serial connected as 1 phase in 6kV series.
10kV series structure diagram
Normally there are 24 power modules and every 8 power modules is serial connected as 1 phase in 6kV series.
Diagram 1: DLHVFseries DLHVF speed regulation device topological diagram
Diagram 2: typical power unit schematic diagram
DLHVFseries DLHVF speed regulation device overlays the output of multiple low voltage power units to get high voltage. Low voltage power units are optimized standard PWM (pulse width modulation) low voltage frequency converter which are widely used for many years.
In diagram 1 shows the typical circuit topological diagram of DLHVFseries DLHVF speed regulation device. For 6kV frequency converting device, each phase of motor is driven by 5 serial connected power units. 15 power units can generate 6000V AC line voltage. For 10kV frequency converting device, each phase of motor is driven by 8 serial connected power units. 24 power units can generate 10000V AC line voltage. Serial connection of power units adopts star connection, neutral line floating, each power units is powered-up by isolation secondary winding of an isolation transformer, input 3 phase 710V AC,50/60Hz power supply, inverter output maximum voltage to 750V AC. Variable power supply maximum frequency to 120Hz. Power units and corresponding transformer secondary winding and its earthing insulation grade is designed for 6kV or 10kV high voltage.
All power units receive the commands from the same main unit controller. These commands are transmitted by optic fibre to ensure the isolation of high and low voltage.
Diagram 2 shows the working principle of typical power unit. 710V AC secondary powered 3 phase diode rectifier charge the DC capacitor bank to about 1000V DS. The DC voltage is supplied to single phase H shape bridge inverter circuit which is composed of IGBT chips.
The secondary winding of phase-shifting transformer which provides power to power units. There is some phase difference between secondary winding of phase-shifting transformer which provides power to power units during enwinding. Main circuits of 5 power units in each phase can form 30 pulse rectification. Main circuits of 8 power units in each phase can form 48 pulse rectification. This multi-level overlay rectification can make DLHVF series DLHVF speed regulation device generate very close to sine waveform output, to remove harmonic current caused by independent power unit. So the current absorbed from power grid is also close to sine waveform. THD of Input current of DLHVFseries DLHVF speed regulation device is also kept within 3%. DLHVFseries DLHVF speed regulation device. The waveform of motor voltage and current in rated output frequency is very close to real sine waveform. The quantitative determination of waveform quality is its total harmonic distortion shorted as THD THD of motor current which is equipped with DLHVFseries DLHVF speed regulation device is less than 3%.
DLHVFseries DLHVF speed regulation device control system is made up of main control unit and PLC. Main control unit is made up of power panel, sampling and relay board, main control board and 3 optic fibre interface board.
The sampling board tests input and output signal. The signal will be range switched and rectified, then transmitted to main control board via mother board. The key component of main control board is made up of DSP and FPGA. It deals with signal analysis, PWM waveform control of all power units, trigger/block/bypass IGBT chips to make the frequency converting device supply corresponding frequency and voltage output, make PLC receive control commands from users (start, stop, emergency stop, frequency settings and others), realizes all kinds of logical processing of switch signals. The control system will also monitor status of all components of frequency converting device(e.g. all power units, transformer, fan and others, provide diagnosis information of fault, and realize fault alarm and protection.
In site application, control system has flexible interface with site, provide valve linkage, automatic adjustment and other needed control functions on site. It is convenient to change control mode to meet user's specified requirements on site.
Bypass device is used in case heavy fault occurs to DLHVF speed regulation device and causes not working properly, to realize the switch between frequency converting and power frequency. There are two modes: manual bypass and auto bypass available for user's option. Standard DLHVF speed regulation device does not include bypass device.
Manual bypass device is made up of high voltage isolation switches. For frequency converting operation open QS3, then close QS1 and QS2, for power frequency open QS1 and QS2, then close QS3. Switching operation between frequency converting and power frequency must be after motor completely stopped. Close or open isolation switch manually. Hot-line operation is strictly prohibited.
Auto bypass device is made up of high voltage contactors. For frequency converting open KM3, then close KM1 and KM2, for power frequency open KM1 and KM2, then close KM3. System will automatically switch (open/close) the high voltage contactors.
- Main technical parameters
|Installation site||Indoor cabinet|
|Topological structure||Power unit multiple level serial connection to PMW voltage source|
|Refitification mode||Phase shifting multiple impulse|
|Motor requirements||Normal high voltage motor||No requirement|
|Input filter||Not required|
|Output filter||Not required|
|Input side fuse protection||have||Power unit input fuse protection|
|Input voltage||-30%~+15% rated voltage, frequency 45Hz~55Hz||Service in derated capacity if voltage decrease by 15%|
|HV input current harmony content||<4%|
|HV input power factor||>0.96|
|HV output voltage and current harmony content||<4%|
|HV output side frequency||5~120Hz, resolution 0.01Hz|
|HV output voltage||0~rated voltage, voltage volatility ±0.5%|
|Overload capacity||1.2 times for 1 minute, 1.5 times instant protection||Customized available|
|Device overall efficiency||Full load>97%, other load>96%|
|Reliability index(mean time between failures)||25,000 hours|
|Control power supply||3-phase 4-wire AC380V, capacity 5kVa||DC power supply also suitable|
|HV LV control signal connection method||Optical fiber cables|
|Noise grade||<75dBA||(1 meter)|
|Cooling mode||Forced air cooling|
|Standard control connection||RS485 MODBUS RTU, DP, Ethernet||Standard industry port|
|Analog value signal (input)||4~20mA or 0~10V 1 way||expandable|
|Analog value signal (output)||4~20mA or 0~10v 3 way||expandable|
|Switch value signal (input)||10 points||expandable|
|Switch value signal (output)||220v AC, 5A, 10 points||expandable|
|Control mode||Touch screen|
|Interface language||Full Chinese|
|Earthing requirements||Earthing resistance <1Ω|
- Working conditions
Ambient temperature: minimum 0ºC, maximum 40ºC, service place temperature variation no more than 5ºC/h.
If ambient temperature exceeds permissible value, corresponding air conditioner equipment is needed;
Ambient humidity should be less than 90%(20ºC), relative humidity change rate should be less than 5% per hour to avoid condensation;
Installation height should be less than altitude 1000 meters. If installation height is more than altitude 1000 meter, device should be used derated, with special design or with venting solutions;
Avoid explosive, corrosive media or conductive any air/dust.
Transportation, storage and installation
DLHVF DLHVF speed regulation device can be transported by automobile, train, ship and other vehicles. Device should be handled with care. No exposure to rain or sun. Avoid strenuous vibration, charge or reverse. Transportation temperature should be within the range of -40~+70ºC;
DLHVF DLHVF speed regulation device maximum height is 2680mm, total height with packaging material will be no more than 2880mm. Please consider height limit during your means of transportation.
DLHVF DLHVF speed regulation device can not be exposed in rain or sun. It should be stored in flowing air. Ambient medium temperature should be in range of -40~+70ºC, air maximum relative humidity should be less than 90%( air temperature 20±5ºC) with air flow in dry clean warehouse;
Avoid mice and mold;
Avoid salt mist, dangerous gas, corrosive liquid.
User is responsible for speed regulation device cabinet preparation; providing, laying, test, connecting of all cables in site. The device manufacture is responsible for electrical installation and test of HV LV lines in device cabinet;
Installation field should have enough weigh capacity and the base must be solid;
Considering the requirements of cooling ventilator and operation space, the back side of device should be at least 1000mm far from wall and the front side should be at least 1500mm far from wall;
Please use the forklift hole in bottom of device to handle with forklift. For lifting the crane must lift from the bottom of device and avoid damage instruments of paint coat;
DLHVF should be steady mounted on the base frame reliably earthing to workshop ground. Shielding layer of transformer and earthing terminal PE should also be earthing to workshop ground. All cabinets should be connected to each other in alignment;
During installation avoid charge and vibration to DLHVF. All cabinet must not be reversed laid. Angle of inclination should be less than 30°;
Withstand voltage of Input and output HV cables must be strictly tested. Signal cables and strong current cables should be separated laid;
User site ground ready, installation base ready, crane ready;
User site HV cables wiring ready, control power and signal cables ready;
User site HV switch ready for power distribution, motor and auxiliary devices are ready for operation.
- Type explanation
Capacity of frequency converter(kVA)
DLHVF speed regulation device
Remarks: serial version design code, code 1is mainly used for fan or pump load.
Voltage grade:06-6kV 10-10kV
Auxiliary code:M-equipped with manual bypass switch cabinet A-equipped with auto bypass switch cabinet A
For example :DLHVF1-1100/06-M
Means capacity of DLHVF DLHVF speed regulation device is 1100kVA, voltage grade 6kV, suitable for fan/pump load motors, equipped with manual bypass switch cabinet.
8.2 product dimensions
6kV DLHVF speed regulation device dimensions
DLHVF type /rated capacity/output current/motor power/dimensions/weight
10kV DLHVF speed regulation device dimensions
DLHVF type /rated capacity/output current/motor power/dimensions/weight
8.2.1 The dimensions above includes phase-shifting transformer cabinet, power unit cabinet and control cabinet. Bypass cabinet is not included. The height does not include bottom base U channel (100mm) and top cooling fan (286~361mm);
8.2.2 If manual bypass cabinet is equipped, the width of bypass cabinet is 1100mm; if auto bypass is equipped, width of 6kV bypass cabinet is 600mm, width of 10kV bypass cabinet is 800mm;
8.2.3 If device dimensions are changed, the actual dimensions are subject to technical agreements;
8.2.4 Air conditioner is advised to be equipped with DLHVF. If air cooling channel is needed, please design according to site condition.
- Ordering instructions
For the best speed regulation and energy saving efficiency, the rated capacity of DLHVF HV frequency converting speed regulation device should be determined according to actual motor load conditions. Therefore user should provide motor type, motor power, stator voltage and current data, together with driven load type and motor actual load rate.