Variable Frequency Drive(VFD)丨3‑Phase BK-ZHB Series(500~630kw)

Produktübersicht

The BK-ZHB570 series (3 Phase) heavy-duty industrial frequency inverter und variable frequency drive (VFD) is a high-performance current vector AC drive specifically engineered for heavy-duty industrial applications requiring three-phase power supply. As a professional frequency converter und inverter drive, it is ideally suited for driving general-purpose three-phase AC asynchronous motors, and excels in powering equipment with high starting impact, continuous heavy loads, and rigorous operational demands—such as industrial crushers, large ball mills, heavy-duty elevators (equipped with dedicated elevator drive), hydraulic presses, steel rolling mill auxiliaries, and mining conveyors (matched with specialized conveyor drive).

This three-phase heavy-duty VFD supports two advanced control modes: voltage-to-frequency ratio control (V/F control) and sensorless vector control (SVC). As a reliable frequency inverter, it boasts an overload capacity of 1.5 times the rated current, outstanding low-frequency high-torque output performance (150% rated torque at 0.25Hz in SVC mode), and a comprehensive fault protection mechanism (including overcurrent, overvoltage, undervoltage, overheating, phase loss, and short-circuit protection). Designed to adapt to three-phase grid characteristics, this AC drive can effectively withstand grid voltage fluctuations, minimize equipment energy losses, and significantly enhance the operational stability and energy efficiency of large-scale industrial production.

Its core design focuses on high reliability, robust environmental adaptability, and precise control under heavy-duty conditions. Through optimized heat dissipation structures, reinforced circuit layouts, and industrial-grade component selection, this frequency converter ensures long-term stable operation in harsh industrial environments—such as high-temperature workshops, dusty mining sites, and humid processing plants—meeting the uninterrupted operation demands of critical industrial processes.

Anwendungen

The BK-ZHB570 Series Heavy-Duty Inverter Drive is widely applied in high-load industrial scenarios and critical infrastructure, providing stable, efficient, and precise drive solutions for heavy-duty equipment with high starting torque requirements and harsh operating conditions:

Heavy Industry & Metallurgy

• Steel rolling mills, continuous casting equipment powered by industrial frequency inverter
• Non-ferrous metal smelting & calendering machines with high-performance VFD
• Ore crushers, ball mills, and mineral processing equipment matched with frequency converter
• Metallurgical hoisting cranes, ladle transfer equipment equipped with AC drive

Mining & Construction Materials

• Mine belt conveyors with dedicated conveyor drive, bucket elevators
• Cement mill drives, rotary kilns powered by heavy-duty variable frequency drive
• Stone crushers, sand making machines supported by inverter drive
• Construction tower cranes, hoisting systems with reliable frequency inverter

Port & Logistics Handling

• Shore container cranes, gantry cranes equipped with VFD
• Grab ship unloaders, bulk material handlers matched with AC drive
• Heavy-duty conveyors with specialized conveyor drive, automated storage stackers
• Container loading/unloading equipment powered by frequency converter

Chemical & Petroleum Industry

• Chemical reactor agitators, pressure vessel drives with industrial frequency inverter
• Oil drilling rigs, well workover machines supported by variable frequency drive
• Large air compressors, reciprocating pumps powered by inverter drive
• Pipeline transportation pumps, oil refining equipment matched with VFD

Water Treatment & Environmental Protection

• Sewage lifting pumps with dedicated pump inverter, sludge dewatering presses
• Aeration blowers (equipped with fan inverter), chemical dosing pumps
• Waste incineration plant grate drives powered by frequency converter
• Desalination plant high-pressure pumps supported by AC drive

New Energy & Power Systems

• Wind turbine pitch control systems with VFD
• Solar energy storage system pumps matched with pump inverter
• Power plant boiler feed pumps, induced draft fans (equipped with fan inverter)
• New energy vehicle production line heavy-duty conveyors with conveyor drive

HVAC & General Industrial

• HVAC systems powered by specialized HVAC inverter for energy-saving operation
• Ventilation equipment with high-efficiency fan inverter
• Building water supply systems matched with pump inverter
• General industrial machinery supported by versatile variable frequency drive

Agriculture & Food Processing

• Large agricultural machinery (combine harvesters, tractors) with frequency inverter
• Grain drying equipment, bulk material conveyors equipped with conveyor drive
• Oil press machines, food extrusion equipment powered by AC drive
• Feed grinder drives, mixing machines matched with VFD

Produktmerkmale

Diversified and Precise Control Technology

As a professional variable frequency drive (VFD), it supports two control modes (V/F control, SVC open-loop vector control), which can be flexibly switched according to the characteristics of heavy-duty equipment. This industrial frequency inverter can output 150% rated torque at a low frequency of 0.25Hz, with strong loaded starting capability and a steady-state speed accuracy of ≤±0.2%, meeting the precise speed regulation needs of pump inverter, fan inverterund elevator drive applications.

Intelligent Integration and Interconnection Capability

This frequency converter is built-in with PID controller and preset frequency function, which can directly connect to closed-loop process control such as pressure and flow. Standard-equipped with RS485 communication interface, compatible with Modbus-RTU protocol, this AC drive facilitates remote control and system integration with PLC and upper computer, reducing the difficulty of automation transformation for conveyor drive und HVAC inverter systems.

Stable and Reliable Heat Dissipation and Protection Design

The fully sealed structure of the heat dissipation duct effectively isolates dust and moisture, with strong environmental adaptability. Combined with intelligent air-cooled control, this inverter drive has excellent heat dissipation efficiency, ensuring long-term stable operation in the industrial environment of -10℃~40℃. The IP20 protection level complies with industrial on-site installation specifications, reducing the external environment impact on pump inverter, fan inverter, and other specialized applications.

Comprehensive Safety Protection System

This VFD integrates 9 core protection functions, including output phase loss, instantaneous current, overvoltage, undervoltage, overheating, overload, overcurrent, braking and short circuit protection. It fully avoids equipment failure risks under heavy-duty working conditions for industrial frequency inverter applications, maximizing the service life of motors and frequency converter.

Convenient and Adaptable Installation and Working Condition Compatibility

The installation process is simple, with two installation methods (wall-mounted and cabinet-type) to adapt to different on-site spaces. The carrier frequency is adjustable from 0.5kHz to 16.0kHz, which can balance low-noise operation and load adaptability, and can match the drive needs of various heavy-duty equipment such as crushers, cranes, and specialized pump inverter, fan inverter, elevator drive, conveyor drive systems.

Spezifikationen

Model Comparison Chart

Note:

1. The size and weight vary depending on the voltage range, and are subject to the customized actual product.
2. DC Input is also customizable. Please contact the sales team before placing the order.

FAQs

1. What is a three-phase Variable Frequency Drive (VFD)?A three-phase VFD (also called frequency inverter) converts three-phase AC power to adjustable frequency/voltage, controlling AC motor speed for heavy industrial equipment.
2. How does this industrial AC drive differ from single-phase models?It supports 0.75~630KW high power, targets heavy-load scenarios (crushers, conveyors), and offers stronger overload capacity—ideal for large-scale industrial use.
3. Can this pump inverter / fan inverter be used for high-pressure pumps?Yes, it’s optimized for industrial pumps/fans, with 150% low-frequency torque and stable output, matching high-pressure pump/fan drive needs.
4. What advantages does this conveyor drive / elevator drive have?It provides precise speed control (≤±0.2% steady-state precision) and comprehensive protection, ensuring safe, uninterrupted operation for heavy-duty conveyors/elevators.
5. Why choose this industrial frequency inverter for harsh environments?Its sealed heat dissipation and IP20 protection resist dust/moisture, operating stably at -10℃~40℃—suited for mining, steel mill, and chemical plant conditions.

✅ FAQs – 500–630kW Three-Phase Variable Frequency Drive (VFD)

Q1: What distinguishes a 500–630kW VFD from lower-power industrial drives?
At this scale, the VFD is no longer just a “component”—it’s an engineered drive system integrated into the facility’s power and process architecture. Key differentiators include:

• Multi-level inverter topology (e.g., 3-level NPC or ANPC) for ultra-low dv/dt (<500 V/µs), extending motor life
• Fully regenerative Active Front End (AFE) with near-unity power factor and bidirectional energy flow
• Modular, scalable power stacks—allowing N+1 redundancy or future capacity expansion
• Compliance with stringent grid codes (IEEE 519, EN 50160, G99, etc.) out of the box

🔍 Keywords: 630kW engineered VFD system, 3-level regenerative VFD, multi-level inverter 600kW, grid-compliant high-power drive

Q2: Where are 500–630kW VFDs typically deployed?
These drives power mission-critical, continuous-duty systems such as:

• National water transmission mains (e.g., 800–1000 HP vertical turbine pumps)
• Deep-shaft mine hoists (>1000m depth) requiring precise torque control during descent
• Main air compressors in LNG or ammonia plants
• Shipboard propulsion auxiliary drives (DNV/GL or ABS marine certified)
• Hot strip mill main stands in integrated steel mills
  Downtime in these applications can cost >$50k/hour—reliability is non-negotiable.

🔍 Keywords: 630kW VFD for water transmission, mine hoist VFD 600kW, marine-certified 500kW VFD, steel mill main drive VFD

Q3: How does regenerative capability benefit a 600kW application?
In four-quadrant operations (e.g., lowering a loaded skip, decelerating a large fan, or reversing a rolling mill), kinetic energy is fed back to the grid instead of being burned off as heat. Benefits include:

• 10–20% net energy savings in cyclic processes
• Elimination of braking resistors (reducing fire risk and cooling load)
• Stable DC bus voltage during rapid deceleration
  This is standard in AFE-based 500–630kW systems.

🔍 Keywords: regenerative 630kW VFD, four-quadrant VFD 600kW, energy feedback VFD for hoist, AFE VFD energy savings

Q4: What harmonic performance can be expected without external filters?
Thanks to advanced topologies:

• AFE + 3-level inverter: THD <3%, PF >0.98
• 24-pulse diode rectifier + phase-shifting transformer: THD <5%
  Both meet IEEE 519 at the point of common coupling (PCC) without additional harmonic mitigation—critical for utility interconnection approval.

🔍 Keywords: IEEE 519 compliant 630kW VFD, THD <3% VFD, 24-pulse VFD 600kW, low-harmonic high-power drive

Q5: How is reliability maintained in 24/7 critical operations?
Through system-level redundancy and diagnostics:

• Hot-swappable control and power modules—no shutdown for maintenance
• Real-time health monitoring: IGBT junction temp, DC capacitor ESR, fan RPM
• Predictive alerts based on thermal cycling and operating hours
• Dual Ethernet ports for independent SCADA and maintenance networks

🔍 Keywords: redundant 630kW VFD, hot-swap power module VFD, predictive maintenance 600kW drive, dual-network VFD

Q6: What cooling solutions are available for confined or high-ambient installations?
Options include:

• Forced-air IP21 cabinet (standard, up to +45°C)
• Closed-loop liquid cooling (for engine rooms, underground mines, or data center co-location)
• Heat pipe or refrigerant-based cooling (for desert environments >50°C)
  Total heat dissipation ranges from 15–25 kW, requiring coordinated HVAC planning.

🔍 Keywords: liquid-cooled 630kW VFD, VFD for >50°C ambient, closed-loop cooling VFD, heat dissipation 600kW drive

Q7: Can this VFD integrate with medium-voltage (MV) switchgear or transformers?
Yes. Many 500–630kW systems are delivered as pre-engineered skids that include:

• Integrated dry-type phase-shifting transformer (for 24-pulse or AFE)
• MV/LV protection coordination with upstream breakers
• Common DC bus for multi-motor applications (e.g., tandem pumps)
  This reduces engineering time and ensures compatibility with existing MV infrastructure.

🔍 Keywords: VFD with integrated transformer 630kW, MV/LV coordinated drive system, common DC bus VFD, pre-engineered VFD skid

Q8: What communication and cybersecurity standards are supported?
Beyond industrial protocols, these systems comply with critical infrastructure security frameworks:

• OPC UA over TLS 1.3 with X.509 certificates
• IEC 62443-3-3 Zone & Conduit model
• Profinet with Profisafe oder EtherNet/IP CIP Security
  All firmware updates and remote access require multi-factor authentication and audit logging.

🔍 Keywords: IEC 62443 VFD 630kW, OPC UA secure VFD, CIP Security 600kW drive, industrial cybersecurity VFD