CN202713226U - Intelligent load tracking mine-used flameproof frequency-conversion speed-adjusting device - Google Patents

Abstract

The utility model discloses an intelligent load tracking mine-used flameproof frequency-conversion speed-adjusting device. The device includes a flameproof cabinet body and a flameproof cabinet body door as well as a first alternating current contactor, a second alternating current contactor, a protecting device, a relay set, an intrinsically safe power supply, a transformer, a discharging contactor and a discharge resistor which are arranged at a bottom plate of the flameproof cabinet body, and a fan box and a junction box which are arranged at an external wall of the flameproof cabinet body. The device is characterized in that a 660V-resistant intelligent frequency converter is fixed at a middle portion of the flameproof cabinet body through a bracket. The intelligent load tracking mine-used flameproof frequency-conversion speed-adjusting device has a flameproof function; and accessories of the device are 660V-voltage resistant, and therefore, the device can not only immediately response to any change of a load, but also can dynamically and optimizedly combine the current, voltage and frequency which are provided to a motor, so that the power factor of the motor can be improved to above 0.9, and further, the device can be installed in a main line with voltage above 660V. The device is especially suitable for under-coal mine operation.

Description

Intelligent load is followed the trail of the mine explosion-suppression RHVC

Technical field

The utility model relates to a kind of improvement of intelligent frequency convertor, specifically a kind ofly is applicable under the coal mine, the intelligent load of voltage more than 660V follow the trail of the mine explosion-suppression RHVC.

Background technology

Institute's use frequency converter is common frequency converter under mine at present; independent is installed in the electrical control cubicles with flame proof function; frequency converter is the on-off action that utilizes power semiconductor device; power frequency supply is transformed to the electric energy control device of another frequency, can realizes soft start, frequency control, raising running accuracy, change power factor, overcurrent/overvoltage/overload protection alternating current motor.The advantage of this frequency converter is to access in the above circuit of 660V, its deficiency is: in the situation that frequency is constant, can not change voltage with the variation of load, so, in the situation that load reduces, load power will occur less than the power output of motor, the required moment of loading is less than motor output torque, and power factor is low, electric efficiency is low, reactive power increases, and the copper loss of motor, iron loss increase, to greatest extent saves energy.At present, release a kind of intelligent frequency convertor on the market, also claim super scholar's frequency converter, its principle is to have adopted the iterative computation technology, by 5000 times/second microcomputer measuring and controlling, and adopt pulse-width regulated (PWM) to control gate pole insulation high power transistor (IGPT), can carry out summary responses to any variation of load, simultaneously the electric current, voltage, the frequency that provide to motor are carried out dynamic optimized combination, the power factor of motor is brought up to more than 0.9.Its structure comprises that mainly power supply and driving mainboard and the power filter plate of withstand voltage 400V, the rectifier bridge of withstand voltage 1600V, the filter capacitor group of withstand voltage 900V, the inversion group (IGBT) of withstand voltage 1200V, AC380V become the transformer of AC220V, the contactor of withstand voltage 400V, because these members are withstand voltage lower, so this intelligent frequency convertor is applicable to the following voltage of 380V, be not suitable for the above voltage of 660V under the coal mine.

Summary of the invention

The purpose of this utility model is to provide a kind of and not only has the flame proof function, and has the performance of intelligent frequency convertor, and adapt to the above voltage of 660V, the intelligent load that is specially adapted to coal mine operation follows the trail of the mine explosion-suppression RHVC.

In order to reach above purpose, the technical scheme that the utility model adopts is: this intelligent load is followed the trail of the mine explosion-suppression RHVC, comprise flameproof cabinet, the flameproof cabinet door, air box, the junction box, the first A.C. contactor, the second A.C. contactor, protector, the relay group, intrinsic safety electric source, transformer, discharge contactor and discharge resistance, the first A.C. contactor, the second A.C. contactor, protector, the relay group, intrinsic safety electric source, transformer, discharge contactor and discharge resistance are installed on the interior base plate of flameproof cabinet successively, the junction box is fixed on the sidewall of flameproof cabinet, air box is fixed on the rear wall of flameproof cabinet, be provided with start button at the flameproof cabinet door, switch knob, reset button, a winding of transformer connects the 660V main line, secondary winding connects intrinsic safety electric source and relay group simultaneously, the switching signal circuit, start given signal circuit, reset circuit, discharge circuit, blower fan in the air box is characterized in that by the second A.C. contactor access 660V main line: the intelligent frequency convertor of anti-660V fixing by support at the middle part of flameproof cabinet; The intelligent frequency convertor of described anti-660V comprises that the inversion group of power supply and driving mainboard and the power filter plate of withstand voltage 750V, the rectifier bridge of withstand voltage 2000V, the filter capacitor group of withstand voltage 1200V, withstand voltage 1700V, AC660V become the transformer of AC220V, the contactor of withstand voltage 750V; The power filter plate of withstand voltage 750V and the rectifier bridge of withstand voltage 2000V connect the AC660V main line simultaneously, the rectifier bridge of withstand voltage 2000V connects the filter capacitor group of withstand voltage 1200V by the contactor of withstand voltage 750V, the filter capacitor group of withstand voltage 1200V is with after the inversion group of withstand voltage 1700V is connected, access respectively power supply and drive 1 pin, 3 pin of the CN6 of mainboard, the inversion group of withstand voltage 1700V connects simultaneously power supply and drives the 1-6 pin of CN4 of mainboard and 1 pin, 2 pin, the 4-8 pin of CN5; 2 pin and 4 pin of the TB1 of power supply and driving mainboard connect the output that AC660V becomes the transformer of AC220V, and the power supply of 220V is provided for driving mainboard; The power filter plate of withstand voltage 750V connect simultaneously AC660V become AC220V transformer input and power supply and drive 5 pin, 7 pin, 9 pin of the CN6 of mainboard.

The utility model is also implemented by following measure: the interior heat exchanger of the inner chamber of described air box and flameproof cabinet is connected, and the heat exchanger bottom nozzle stretches out flameproof cabinet.

The beneficial effects of the utility model are: this intelligent load is followed the trail of the mine explosion-suppression RHVC, compare with employed frequency converter under the present coal mine, not only have the flame proof function, be applicable to the above voltage of 660V, and have all functions of intelligent frequency convertor; With at present on the 380V voltage circuit employed intelligent frequency convertor compare, owing to the accessory of the only voltage of anti-380V in the intelligent frequency convertor all is replaced by the accessory of the above voltage of anti-660V, and be installed in the same flameproof cabinet, so, can not only carry out summary responses to any variation of load, the electric current, voltage, the frequency that provide to motor are carried out dynamic optimized combination, the power factor of motor is brought up to more than 0.9, and can be directly installed in the main line of the above voltage of 660V, and had explosion insulation performance.Be specially adapted to coal mine operation.

Description of drawings

Fig. 1 is structure front-view schematic diagram of the present utility model;

Fig. 2 is assembly structure circuit theory schematic diagram of the present utility model;

Fig. 3 is the intelligent frequency convertor circuit theory schematic diagram of anti-660V of the present utility model;

Among the figure: 1, flameproof cabinet; 2, flameproof cabinet door; 3, air box; 4, junction box; 5, the first A.C. contactor; 6, the second A.C. contactor; 7, protector; 8, relay group; 9, intrinsic safety electric source; 10, transformer; 11, discharge contactor; 12, discharge resistance; 13, support; 14, the intelligent frequency convertor of anti-660V; 141, power supply and driving mainboard; 142, the power filter plate of withstand voltage 750V; 143, the rectifier bridge of withstand voltage 2000V; 144, the filter capacitor group of withstand voltage 1200V; 145, the inversion group of withstand voltage 1700V; 146, AC660V becomes the transformer of AC220V; 147, the contactor of withstand voltage 750V; 15, heat exchanger; 16, start button; 17, switch knob; 18, reset button.

Embodiment

Make the utility model with reference to Fig. 1, Fig. 2, Fig. 3.This intelligent load is followed the trail of the mine explosion-suppression RHVC, comprise flameproof cabinet 1, flameproof cabinet door 2, air box 3, the junction box 4, the first A.C. contactor 5, the second A.C. contactor 6, protector 7, relay group 8, intrinsic safety electric source 9, transformer 10, discharge contactor 11 and discharge resistance 12, the first A.C. contactor 5, the second A.C. contactor 6, protector 7, relay group 8, intrinsic safety electric source 9, transformer 10, discharge contactor 11 and discharge resistance 12 are installed on the base plate in the flameproof cabinet 1 successively, junction box 4 is fixed on the sidewall of flameproof cabinet 1, air box 3 is fixed on the rear wall of flameproof cabinet 1, be provided with start button 16 at flameproof cabinet door 2, switch knob 17, reset button 18, a winding of transformer 10 connects the 660V main line, secondary winding connects intrinsic safety electric source 9 and relay group 8 simultaneously, the switching signal circuit, start given signal circuit, reset circuit, discharge circuit, blower fan in the air box 3 is by the second A.C. contactor 6 access 660V main lines, it is characterized in that: the intelligent frequency convertor 14 of fixing anti-660V at the middle part of flameproof cabinet 1 by support 13, make the intelligent frequency convertor 14 of anti-660V leave the inwall of flameproof cabinet 1, have good flame proof function; The intelligent frequency convertor 14 of described anti-660V comprises that the inversion group 145 of power supply and driving mainboard 141 and the power filter plate 142 of withstand voltage 750V, the rectifier bridge 143 of withstand voltage 2000V, the filter capacitor group 144 of withstand voltage 1200V, withstand voltage 1700V, AC660V become the transformer 146 of AC220V, the contactor 147 of withstand voltage 750V; The power filter plate 142 of withstand voltage 750V and the rectifier bridge 143 of withstand voltage 2000V connect the AC660V main line simultaneously, the rectifier bridge 143 of withstand voltage 2000V connects the filter capacitor group 144 of withstand voltage 1200V by the contactor 147 of withstand voltage 750V, the filter capacitor group 144 of withstand voltage 1200V is with after the inversion group 145 of withstand voltage 1700V is connected, access respectively power supply and drive 1 pin, 3 pin of the CN6 of mainboard 141, the inversion group 145 of withstand voltage 1700V connects simultaneously power supply and drives the 1-6 pin of CN4 of mainboard 141 and 1 pin, 2 pin, the 4-8 pin of CN5; 2 pin and 4 pin of the TB1 of power supply and driving mainboard 141 connect the output that AC660V becomes the transformer 146 of AC220V, and the power supply of 220V is provided for driving mainboard; The power filter plate 142 of withstand voltage 750V connect simultaneously AC660V become AC220V transformer 146 input and power supply and drive 5 pin, 7 pin, 9 pin of the CN6 of mainboard 141.

As improvement of the present utility model: the inner chamber of described air box 3 is connected with heat exchanger 15 in the flameproof cabinet 1, heat exchanger 15 bottom nozzles stretch out flameproof cabinet 1, by heat exchanger 15, can make in flameproof cabinet 1 chamber cooling, can isolate with the inner chamber of flameproof cabinet 1 with making the gas that enters in the heat exchanger 15 again.

Claims (2)

1. intelligent load is followed the trail of the mine explosion-suppression RHVC, comprise flameproof cabinet (1), flameproof cabinet door (2), air box (3), junction box (4), the first A.C. contactor (5), the second A.C. contactor (6), protector (7), relay group (8), intrinsic safety electric source (9), transformer (10), discharge contactor (11) and discharge resistance (12), the first A.C. contactor (5), the second A.C. contactor (6), protector (7), relay group (8), intrinsic safety electric source (9), transformer (10), discharge contactor (11) and discharge resistance (12) are installed on the interior base plate of flameproof cabinet (1) successively, junction box (4) is fixed on the sidewall of flameproof cabinet (1), air box (3) is fixed on the rear wall of flameproof cabinet (1), be provided with start button (16) at flameproof cabinet door (2), switch knob (17), reset button (18), a winding of transformer (10) connects the 660V main line, secondary winding connects intrinsic safety electric source (9) and relay group (8) simultaneously, the switching signal circuit, start given signal circuit, reset circuit, discharge circuit, blower fan in the air box (3) is characterized in that: the intelligent frequency convertor (14) of fixing upper anti-660V at the middle part of flameproof cabinet (1) by support (13) by the second A.C. contactor (6) access 660V main line; The intelligent frequency convertor of described anti-660V (14) comprises that the inversion group (145) of power supply and driving mainboard (141) and the power filter plate (142) of withstand voltage 750V, the rectifier bridge (143) of withstand voltage 2000V, the filter capacitor group (144) of withstand voltage 1200V, withstand voltage 1700V, AC660V become the transformer (146) of AC220V, the contactor (147) of withstand voltage 750V; The power filter plate (142) of withstand voltage 750V and the rectifier bridge (143) of withstand voltage 2000V connect the AC660V main line simultaneously, the rectifier bridge of withstand voltage 2000V (143) connects the filter capacitor group (144) of withstand voltage 1200V by the contactor (147) of withstand voltage 750V, the filter capacitor group (144) of withstand voltage 1200V is with after the inversion group (145) of withstand voltage 1700V is connected, access respectively 1 pin of the CN6 of power supply and driving mainboard (141), 3 pin, the inversion group (145) of withstand voltage 1700V connect simultaneously power supply and drive the 1-6 pin of CN4 of mainboard (141) and 1 pin of CN5,2 pin, the 4-8 pin; 2 pin of the TB1 of power supply and driving mainboard (141) and 4 pin connect the output that AC660V becomes the transformer (146) of AC220V; The power filter plate (142) of withstand voltage 750V connect simultaneously AC660V become AC220V transformer (146) input and power supply and drive 5 pin, 7 pin, 9 pin of the CN6 of mainboard (141).

2. intelligent load according to claim 1 is followed the trail of the mine explosion-suppression RHVC, it is characterized in that: the heat exchanger (15) in the inner chamber of described air box (3) and the flameproof cabinet (1) is connected, and heat exchanger (15) bottom nozzle stretches out flameproof cabinet (1).

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