1140V 1600kW Mine-Proof and Intrinsically Safe Variable Frequency Drive
The module is a flexible, modular power quality product designed for harmonic suppression, power factor correction, and three-phase balance.
Rated capacity: 30A/50A/75A/100A/150A/200A
Rated input: 200/400/480/690/800V AC
Grid frequency: 50/60 Hz ± 10%
Filter range: 2 to 50 orders
Installation types: wall-mounted, rack-mounted, upright
Power grid configuration: 3P3W, 3P4W
Service Hotline: +86-10-81799630
Email: Liry_chinnovo@126.com
Category:
Special frequency converter
Keywords:
Product Description
Product Overview
Inverter rated input voltage: 10 kV / AC 2 × 660 VAC (±10%); Rated output voltage: 0~1140 VAC; Rated output current: 405 A (per channel). Enables smooth soft start, soft stop, speed regulation, and power balancing for belt conveyors.
Principle Topology
Figure 1: Schematic Diagram of the Belt Electrical Control System
This belt's main drive is by 2 A six-phase motor composed of multiple shafts with different axes. 1600kW , each winding 800kW ). 1# The motor is driven by 1# Variable-frequency drive, 2# The motor is driven by 2# Inverter-driven. Under normal circumstances, 1# Frequency conversion as the main approach, 2# Frequency conversion is from (master and slave can be interchanged). 1# Motor and 2# The motors are all in 6 Operating condition of the phase, rated current of each winding 460A。
Figure 2: Main Circuit of the Inverter
The frequency converter consists of a mobile substation, a pre-charge stage, a DC bus, and a three-level full-bridge topology. A rectifier bridge is configured at the front end. 2 The power reactor suppresses inrush current. The master and slave frequency converters maintain command synchronization via high-speed communication; the master unit handles speed control, while the slave unit follows the torque command. The inverter employs a three-level topology internally. With an increased number of voltage levels, harmonic distortion is reduced, and the waveform’s sinusoidal quality is superior to that of a two-level topology. The six-phase bridge arm output achieves a redundant design for the main circuit, enhancing reliability.
Figure 3: Redundant Design
If at this moment 1# Variable-frequency -INV1 A malfunction has occurred. The fault signal has been reported to the console, and the console operator can switch the mode from “Normal Mode” to “…” using the “Mode Switch.” INV2 “Three-phase operating mode”—after receiving a command from the console, the inverter will automatically disconnect or close the switchgear inside. KM1~KM5 Contactor, enabling the main circuit from the inverter to the motor to be in a closed state. INV2 In “three-phase operation mode,” this ensures that the belt can still start and maintain operation at half speed under full load; similarly, if... 1# Variable-frequency -INV2 The same goes for when a malfunction occurs.
Technical Specifications
Parameter Category |
Technical specification |
Input side |
|
Rated input voltage |
Mobile substation: 10 kV / AC 2* 660Vac (±10%) |
Input frequency |
50 Hz ± 5% |
Number of phases |
6-phase (equivalent to two independent three-phase power supplies with a phase difference of 30°) |
Topological structure |
Three-level (NPC) |
Output side |
|
Rated output voltage |
0~1140 VAC |
Rated output current |
405A (Per channel)
|
Rated output frequency |
0–50 Hz (expandable up to 0–120 Hz) |
Overload capacity |
150% rated current, sustained for 60 seconds; 200% rated current, sustained for 2 seconds |
DC bus |
|
Rated DC voltage |
1860V (no-load) |
System performance |
|
Rated power |
1600 kW |
System efficiency |
> 98% (at rated load) |
Power factor |
> 0.96 (At rated load, above 20% load) |
Control method |
Sensorless Vector Control (SVC) / Vector Control with Speed Sensor (FVC) |
Protection and Cooling |
|
Explosion-proof type |
Flameproof Ex d [ib] I Mb (Or according to specific mining requirements)
|
Cooling method |
Water-cooled |
Inlet water temperature |
≤ 35°C |
Inlet pressure |
0.2–0.4 MPa |
Water quality requirements |
Pure water |
Control and Communication |
|
Control mode |
Master-slave control (Supports speed master-slave, torque master-slave, and load balancing control)
|
Synchronization method |
Synchronous operation via 485 twisted pair or high-speed fiber optic cable, ensuring consistent torque response between the two units. |
Standard communication interface |
Modbus TCP / CAN |
Host computer interface |
Modbus/Ethernet interface, supports OPC UA/Modbus TCP |
I/O interface |
Digital Input/Output (DI/DO), Analog Input/Output (AI/AO) |
Mechanical properties |
|
Installation method |
Flange installation, suitable for explosion-proof enclosures. |
Shell material |
High-strength steel plate welding (explosion-proof enclosure) |
Protection level |
IP45 (Inside the shell)
|
Color |
Mining white or other |
External dimensions (optional): 3490*1300*1435mm
Product Features
1 Master-slave control function ：
- One is designated as the master drive, and the other as the slave drive.
- The main drive unit uniformly issues speed and torque commands via... Fiber-optic real-time synchronization Ensure that the output torques of the two machines are highly consistent, achieving perfect load balancing and preventing belt tearing caused by torque desynchronization.
2 Electricity Flat Topological Advantage ：
- Excellent output waveform: Low harmonic content in the output voltage, dv /dt Small size reduces the impact on motor insulation, extending the motor's lifespan.
- High efficiency: Switching losses are lower than those in a two-level topology, resulting in higher system efficiency.
- Low common-mode voltage: effectively reduces bearing currents and electromagnetic interference. ( EMI).
3 Comprehensive protection features ：
- It features protections against overcurrent, overvoltage, undervoltage, overheating, phase loss, short circuit, ground fault, overspeed, and stalling.
4 Humanized Operation and Monitoring ：
- Equipped with a touch-screen human-machine interface (HMI) It can display real-time information such as voltage, current, frequency, power, torque, and equipment status.
- Supports fault logging and operational data traceability features.
- Supports remote monitoring and debugging.
Application scenarios
Main drive for high-power, long-distance belt conveyors
Application site photos
On-site installation photos
Live operational view
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Beijing Qian'an Electrical Technology Co., Ltd.
Service Hotline: +86-10-81799630
Email: Liry_chinnovo@126.com
Address: Room 906-907, Unit 3, Building 3, No. 42, North Seventh Road, Changping District, Beijing市
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