Specialized Variable-Frequency Drive (VFD)
Special frequency converters (electrostatic precipitator power supplies) (4-315kW)
High voltage electrostatic precipitator power supply special frequency converter can support all kinds of dust removal equipment, widely used in electric power, metallurgy, building materials, light industry, chemical industry and many other industries of flue gas dust treatment, is an efficient dust removal, important equipment for environmental protection. The power supply will be rectified by the power frequency three-phase AC power supply after high frequency inverter, and then boost and secondary rectification into DC negative high voltage output, compared with the traditional SCR control power supply, it has a number of significant advantages, such as small output voltage ripple, high average voltage and current, high conversion efficiency and high power factor, usually with a power range of 4~315kW, can be accurate control and adjustment of electrostatic precipitator according to the need, in order to achieve more efficient dust removal effect. This special frequency converter can provide stable and reliable power output, and has a variety of protection functions, to ensure the safe and reliable operation of the equipment.
Description
The high-voltage electrostatic precipitator power-specific frequency converter is designed to be compatible with various types of dust removal equipment and finds wide application in the treatment of smoke and dust in industries such as electric power, metallurgy, building materials, light industry, and chemical industry. It serves as an important device for efficient dust removal and environmental protection. This power source rectifies the three-phase AC power after high-frequency inversion following initial rectification. It then undergoes a voltage boost and secondary rectification transformation into DC negative high-voltage output. Compared to traditional thyristor-controlled line frequency power sources, it offers significant advantages including low output voltage ripple, high average voltage current, high conversion efficiency, and power factor.
Reliability:
- The entire product range conforms to the national standard open-grade EMC testing standards and has obtained the CNAS system certification certificate and authentication record number.
- Generous margin design, rigorous testing and validation, selection of high-quality components, meticulous process management to ensure long-term reliable operation of the product.
- The entire product line adopts an encapsulated IGBT module solution, effectively ensuring product consistency and reducing quality blind spots.
- Three-channel current sampling enables precise torque control while effectively protecting against abnormal conditions such as overcurrent, short circuits, and grounding.
- Robust switch power protection design ensures product stability under any auxiliary power instantaneous/continuous short-circuit conditions.
- The product utilizes original German Peters three-proof paint, along with a two-coat application process, to ensure reliable operation in complex environments.
Structural properties:
- Direct independent air duct design, spatial isolation, maximizes heat dissipation capability and supports compact installation of multiple units in parallel.
- The entire series is equipped with high-speed DC fans, offering extended lifespan and easy replacement.
- Optional dust cover plates and dust screens (supporting quick installation) are available to effectively reduce the impact of dust and moisture on the product.
- Models with a power rating of 160KW and above support cabinet mode, enabling rapid and cost-effective cabinet assembly.
Characteristics of the software:
- Multiple control modes such as V/F, open-loop vector, closed-loop vector, and pressure frequency separation are available with deeply optimized software performance, making it suitable for a wide range of application environments.
- Supports static and dynamic self-learning modes, enabling rapid and accurate acquisition of motor parameters.
- Upon power-up, automatic ground detection is performed on the power output line (including the motor), enabling comprehensive protection for both the inverter and motor.
- Optimized speed tracking function, supports one-to-one or one-to-many tracking start, effectively reducing the start-up surge current.
- Rapid suppression function for over-current and over-voltage ensures uninterrupted operation in the event of sudden load fluctuations.
- Supports parameter copying, enabling rapid batch debugging of similar functional requirement environments.
Expanded Features:
- Supports a variety of encoders, including differential signal and open collector signal.
- Supports 2/3 channels of 0~10V analog isolated inputs.
- Supports 2/3 channels of 0~1V analog isolated inputs.
- Supports 2/3 channels of 0~10V or 0~1A combined analog isolated inputs.
- We are soon launching a programmable I/O expansion card that can serve as a cost-effective alternative to small PLCs, effectively reducing system costs for our customers.
Technical Specifications:
1. Output voltage range: 0~400V.
2. Output frequency range: Medium frequency 0~500Hz, high frequency 8~14kHz.
3. Offers continuous and intermittent modes for selection; the medium frequency allows setting of intermittent cycle counts, while the high frequency permits configuration of on/off cycle counts.
4. DI1: Safety interlock - when parameters are validly set, closing this point prepares the system, while opening it stops operation and triggers an alarm.
5. DI2: Start/Stop - when "local" is selected as a parameter, closing initiates start-up and outputs the specified voltage according to AI1's given 4-20mA output; opening stops output. When "DCS" is chosen as a parameter, closing starts up and outputs based on AI1's given 4-20mA signal; opening stops operation.
6. DI3: Voltage reduction spray - when parameters are validly set and reach the specified closure count, it reduces the output voltage to a preset value upon closure and restores previous operating values upon opening.
7. DI4: Oil temperature alarm - closing this point stops output and triggers an alarm.
8. DI5: Carbon monoxide alarm - closing this point stops output and triggers an alarm.
9.DI6：DCS startup – selecting “DCS” as a parameter closes relay 1 momentarily if closed or opens relay 2 momentarily if opened.
10.AI1：Accepts either a 4-20mA signal or potentiometer-set value to control output voltage.
11.AI2：Secondary voltage input signal,-10V ~0V，a scaling factor determined by parameters indicates secondary voltage values represented by input signals.
12.AI3：Secondary current input signal，0V ~10V，a scaling factor determined by parameters indicates secondary current values represented by input signals.
13.AO1：Outputs a current signal of 4-20mA depending on secondary voltage size or outputs a voltage signal of O—SV depending on primary voltage size.
14.AO2：Outputs a current signal of 4-20mA depending on secondary current size or outputs a voltage signal of O—SV depending on primary current size.
15.Relay Output l:DOSor remote start-stop effective,receives start command,momentarily closes.
16.Relay Output Z:DOSor remote start-stop effective,receives stop command,momentarily closes during failure.
17.Has spark sensitivity setting : three judgment conditions determine effectiveness,judgment threshold can be adjusted.
18.Voltage recovery fast/slow setting after spark pressure drop.
19.Alarm protection value setting : various alarms thresholds can be adjusted.
20.Run time settings (staged) : staged run time settings,cannot operate after expiration.
21.Factory value saving & restoration.
22.Displays spark rate : records number of sparks in sixty seconds.
23.Primary overcurrent protection,instantaneous exceeding110% rated primary current.Slow reaching100% restricts.
24.Secondary short circuit protection,output transformer short circuit,voltage lower than set value,current greater than set value,and reaches repeated action times trigger alarms.
25.Secondary open circuit protection ,instantaneous higher than set-value trigger alarms.
26.High oil temperature protective warning.
27.CO out-of-range protective warning.
28.Other VFD faults (such as overcurrent ,overtemperature ,overvoltage etc.) triggering warnings.
