CN203504471U - Power supply system for variable-frequency winch - Google Patents
Power supply system for variable-frequency winch Download PDFInfo
- Publication number
- CN203504471U CN203504471U CN201320661548.1U CN201320661548U CN203504471U CN 203504471 U CN203504471 U CN 203504471U CN 201320661548 U CN201320661548 U CN 201320661548U CN 203504471 U CN203504471 U CN 203504471U
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- main motor
- power supply
- frequency
- variable
- transformer
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Abstract
The utility model provides a power supply system for a variable-frequency winch. The power supply system comprises a feedback power supply, a main motor, a frequency converter, a main motor fan and a hydraulic oil pump, wherein the main motor drives the variable-frequency winch to work, the feedback power supply is connected with a frequency converter for supplying power to the frequency converter, and an output end of the frequency converter is connected with the main motor; the frequency converter comprises a transformer, an output end of the transformer is connected with an input end of a lighting comprehensive protector, the transformer carries out voltage step-down conversion on the feedback power supply and supplies power for the lighting comprehensive protector to operate, an output end of the lighting comprehensive protector is connected with a PLC control cabinet, and the PLC control cabinet respectively controls the main motor, the main motor fan and the hydraulic oil pump. The voltage of a working power supply of the hydraulic oil pump, the main motor and the main motor fan is reduced to 660V by the transformer, the reduction of voltage classes reduces the insulating requirements for the motor and prolongs the service life of the motor; and the transformer plays an isolating role in voltage fluctuations of a power grip, and makes the operating power supply of the main motor more stable.
Description
Technical field
The utility model relates to variable-frequency hoist technical field, is specifically related to a kind of electric power system of variable-frequency hoist.
Background technology
In mine hoisting system, the frequency that in inclined gallery, variable-frequency hoist is used is increasing, and power, the electric pressure of variable-frequency hoist are increasing, and common employing power is that the variable-frequency hoist that 355KW, voltage are 1140V is proposed material transportation as inclined gallery at present.When variable-frequency hoist frequency converter starts, also obvious by the frequency converter impact voltage harmonic that produces, electric power system is impacted.Because power component is very responsive to factors such as electrical current, resonance current, radiating efficiencys, although frequency converter front and back end is all equipped with reactor, heat absorption protection, current protective device.But because higher order resonances exists the feature that frequency is high, the time is short; and protective device often can not absorb completely or have little time to make protection action; its remaining resonance current peak value bears current range much larger than motor, produces thus aftercurrent feedback and burns out the phenomenons such as low-power machine, switch JDB, circuit board.Same hydraulic motor, blower motor also can produce feedback of harmonic to frequency conversion electrical control system while producing fault, thereby power component is caused to some impacts.Therefore, voltage fluctuation generation high-frequency resonant is the main cause of motor and component wear.
Utility model content
The utility model will solve above-mentioned deficiency exactly, and a kind of electric power system of variable-frequency hoist is provided, and small machine is realized to isolated power supply, has protected power supply safety, and reduces the generation of fault, has saved cost simultaneously.
In order to reach above-mentioned effect, the utility model provides a kind of electric power system of variable-frequency hoist, comprise feed power supply, and the main motor of variable-frequency hoist work, frequency converter, main motor fan, hydraulic oil pump, described feed power supply and frequency converter are connected to its power supply, and the output of described frequency converter is connected with main motor; Described frequency converter comprises transformer, the output of described transformer is connected with the input of illumination integrated protection, described transformer carries out feed power supply to supply illumination integrated protection working power after voltage step-down conversion, the output of described illumination integrated protection is connected with PLC control cubicle, and described PLC control cubicle is controlled respectively main motor, main motor fan, hydraulic oil pump.
Further, in described PLC control cubicle, be provided with A.C. contactor, described unsteady flow contactor is connected with main motor, illumination integrated protection output voltage by electric wire respectively.
Further, described transformer is converted to the feed power supply step-down of 1140V the low-tension supply of 660V.
Further, described frequency converter also comprises that eliminating generation disturbs and strengthen the filter of its Electro Magnetic Compatibility, and falls lower powered inverter.
For protection PLC control cubicle and the not impact of acceptor's electrical fault of transformer, between described transformer and illumination integrated protection, be provided with feeding switch, feeding switch is introduced 660V low-tension supply from the transformer of frequency converter.
The 1140V feed power supply step-down that transformer in frequency converter of the present utility model provides electric substation is converted to the low-tension supply of 660V for elements such as main motor, main motor fan, hydraulic oil pump, illumination integrated protections.Cancelled the 1140V Power supply mode of hydraulic oil pump and main motor and main motor fan, and change into by frequency converter self transformer-supplied, supply power voltage changes 660V into, thereby the high order harmonic component producing by transformer isolation voltage fluctuation is eliminated the impact that low-power machine is caused.The 660V power supply of being introduced from feed source by the A.C. contactor of PLC cabinet Nei Xinjia is controlled hydraulic oil pump and main motor and main motor fan; because voltage is after transformer isolation; voltage fluctuation on motor almost without any impact, also just without using 80 switch activated, protection motors.Both can simplify circuit, again easy access.
Feeding switch has protected PLC control cubicle and transformer not affected by electrical fault, has both been convenient to protect main motor, transformer, also the main motor of easy access.
So it is that 660V powers that the power supply of hydraulic oil pump of the present utility model and main motor and main motor fan is changed into by the step-down of frequency converter internal transformer by the direct power supply of 1140V power supply, electric pressure reduces, insulating requirements to motor reduces simultaneously, with entering to have extended motor useful life; Transformer has played buffer action to voltage ripple of power network in addition, makes main motor operation power supply more stable.Also reduce switch and used number of units, reduced fault point and lost quick-fried hidden danger point, be conducive to regular maintenance.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the utility model circuit block diagram.
Embodiment
As shown in Figure 1, an electric power system for variable-frequency hoist, comprises feed power supply 1, and the main motor 3 of variable-frequency hoist work, frequency converter 2, main motor fan 7, hydraulic oil pump 8, described feed power supply 1 is connected to its power supply with frequency converter 2, and the output of frequency converter 2 is connected with main motor 3; Described frequency converter 2 comprise conversion electric power voltage transformer 2-1, eliminate to produce and to disturb and to strengthen the filter 2-3 of its Electro Magnetic Compatibility, and lower powered inverter 2-2 falls; The output of described transformer 2-1 is connected with the input of illumination integrated protection 5, transformer 2-1 carries out voltage step-down by the feed power supply of 1140V 1 and is converted to 660V low-voltage for illumination integrated protection 5 work, the output of described illumination integrated protection 5 is connected with PLC control cubicle 6, PLC control cubicle 6 is controlled respectively main motor 3, main motor fan 7, hydraulic oil pump 8, so the working power of main motor 3, main motor fan 7, hydraulic oil pump 8 is all 660V power supply, safe and reliable.
Further, in described PLC control cubicle 6, be provided with A.C. contactor, described unsteady flow contactor is connected with main motor 3, illumination integrated protection 5 output voltages by electric wire respectively.
Above embodiment is not limited only to protection range of the present utility model, all based on basic thought of the present utility model, modify or change all belong to protection range of the present utility model.
Claims (5)
1. the electric power system of a variable-frequency hoist, comprise feed power supply, and the main motor of variable-frequency hoist work, frequency converter, main motor fan, hydraulic oil pump, it is characterized in that: described feed power supply and frequency converter are connected to its power supply, and the output of described frequency converter is connected with main motor; Described frequency converter comprises transformer, the output of described transformer is connected with the input of illumination integrated protection, described transformer carries out feed power supply to supply illumination integrated protection working power after voltage step-down conversion, the output of described illumination integrated protection is connected with PLC control cubicle, and described PLC control cubicle is controlled respectively main motor, main motor fan, hydraulic oil pump.
2. the electric power system of variable-frequency hoist according to claim 1, is characterized in that: in described PLC control cubicle, be provided with A.C. contactor, described unsteady flow contactor is connected with main motor, illumination integrated protection output voltage by electric wire respectively.
3. the electric power system of variable-frequency hoist according to claim 1, is characterized in that: described transformer is converted to the feed power supply step-down of 1140V the low-tension supply of 660V.
4. the electric power system of variable-frequency hoist according to claim 1, is characterized in that: described frequency converter also comprises that eliminating generation disturbs and strengthen the filter of its Electro Magnetic Compatibility, and falls lower powered inverter.
5. the electric power system of variable-frequency hoist according to claim 1, is characterized in that: between described transformer and illumination integrated protection, be provided with feeding switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320661548.1U CN203504471U (en) | 2013-10-22 | 2013-10-22 | Power supply system for variable-frequency winch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320661548.1U CN203504471U (en) | 2013-10-22 | 2013-10-22 | Power supply system for variable-frequency winch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504471U true CN203504471U (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320661548.1U Expired - Fee Related CN203504471U (en) | 2013-10-22 | 2013-10-22 | Power supply system for variable-frequency winch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504471U (en) |
-
2013
- 2013-10-22 CN CN201320661548.1U patent/CN203504471U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20141022 |
|
| EXPY | Termination of patent right or utility model |