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BPQJ Variable Frequency Drive

The explosion-proof type of the BPQJ series mining flameproof and intrinsically-safe combined frequency conversion starter is mining flameproof and intrinsically-safe Exd [ib] I. It is composed of variable-frequency speed control system, electrical control system, display system and parameter setting. It applies advanced IGBT frequency control and vector current loop control theory to the speed regulation device with high degree of automation and leading technology. Tests and inspections such as flameproof, alternate wet and heat and electric property have been conducted for the device, and relevant certificates have been obtained. The converter has perfect protection functions such as short-circuit protection, overcurrent, overload, overvoltage, under-voltage and over-temperature protection. The converter core is the IGBT semiconductor switching device, adopting the mature high-quality device of German INFINEON; the drive circuit adopts integrated circuit with high precision designed with imported chip. Through controlling the software design, it can rapidly handle various external input orders and cope with emergency circumstances. Under the circumstance of non-stop, the system can automatically remove a part of faults so as to reduce frequent participation of users.

Technical parameters
Product advantage
Overall dimensions
Product features
Purpose
Use conditions

Product model	BPQJ-(400, 250)/1140	BPQJ-(500, 300)/1140
Explosion prevention type	Exd［ib］ΙMb
Rated power	400kW	500kW
Rated operating voltage	Three-phase1140VAC，50Hz±0.5%
Voltage fluctuation range	－20%～＋20%
Rated current	250A	300A
Output voltage	0～1140VAC
Output current	0～250A	0～300A
Output frequency	0～50Hz
Carrier frequency	1.5kHz
Working system	Long term working system
Cooling mode	Natural cooling
Control motor	Synchronous (asynchronous) motor	Synchronous (asynchronous) motor

1. Synchronous frequency converter’s starting torque is large, which can reach 200% of the rated torque;

2. Belt frequency converter starts on ramp, to minimize damage to the belt and drum when starting;

3. Synchronous direct-driven frequency converter is efficient and energy-saving, and the power saving effect can reach more than 20%;

4. Synchronous direct-driven system eliminates the decelerator, hydraulic coupler and other equipment, so that the overall efficiency of the system can be increased to more than 95%;

5. Rich communication function can support CAN, RS485, PROFBUS, DP and other communication interface access, realize the communication with the upper computer, realize the centralized control of the operation of multiple equipment, and can monitor the operation data transmitted to the ground dispatching station online;

6. Historical data storage can save the operation data of recent one year, and the data can be exported in EXCEL format, transformed into graphic mode through the software developed by Huaxin, and convenient for understanding the historical working condition of belt conveyor.

Specification & model	Overall dimensions mm	Weight Kg
BPQJ-(400，250)/1140	1723×1437×1250	2000
BPQJ-(500，300)/1140	1723×1437×1285	2300

1. Asynchronous frequency converter’s starting torque is large, which can reach 150% of the rated torque

2. Synchronous frequency converter’s starting torque is large, which can reach 200% of the rated torque

3. Belt frequency converter starts on ramp, to minimize damage to the belt and drum when starting

4. Synchronous direct-driven frequency converter is efficient and energy-saving, and the power saving effect can reach more than 20%

5. Synchronous direct-driven system eliminates the decelerator, hydraulic coupler and other equipment, so that the overall efficiency of the system can be increased to more than 95%.
The BPQJ series mining flameproof and intrinsically-safe combined frequency conversion starter can be used for regulating the speed of mining belt conveyor motors, applicable to frequency conversion driving system of synchronous or asynchronous motors. This product belongs to two-quadrant working system and it can meet the starting and speed governing requirements of asynchronous motors for mining belt conveyors and scraper.
1. Environment temperature: 0℃ - +40℃;

2. Maximum average relative humidity: ≤95% (at +25℃);

3. Atmospheric pressure: 80kpa-106kpa (at +25℃);

4. No occasion with serious dripping and splashing in the surrounding;

5. Environment with explosive gases, such as methane and coal dust, but without corrosive gases.