CN202260489U - Rectification feedback device for dam crest gantry crane and tailwater gantry crane - Google Patents
Rectification feedback device for dam crest gantry crane and tailwater gantry crane Download PDFInfo
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- CN202260489U CN202260489U CN2011203903134U CN201120390313U CN202260489U CN 202260489 U CN202260489 U CN 202260489U CN 2011203903134 U CN2011203903134 U CN 2011203903134U CN 201120390313 U CN201120390313 U CN 201120390313U CN 202260489 U CN202260489 U CN 202260489U
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- rectification feedback
- gantry crane
- dam crest
- feedback device
- rectification
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Abstract
The utility model relates to a rectification feedback device for a dam crest gantry crane and a tailwater gantry crane. The rectification feedback device for the dam crest gantry crane and the tailwater gantry crane comprises an incoming wire contactor, an incoming wire reactor, an auto-transformer, a rectification feedback circuit and an inverter, wherein an alternating-current power supply passes through the incoming wire contactor and then enters the incoming wire reactor; the auto-transformer is connected with the incoming wire reactor in parallel; the secondary output end of the auto-transformer is connected with the input end of the rectification feedback circuit; direct current output from the rectification feedback circuit enters the inverter and motors in sequence; the alternating-current power supply passes through a general alternating-current contactor and an incoming wire breaker and then enters the incoming wire contactor; the direct current output from the rectification feedback circuit passes through an air switch and a fuse protector and then enters the motors; and the motors are a dam crest gantry crane motor and a tailwater gantry crane motor. The rectification feedback device for the dam crest gantry crane and the tailwater gantry crane, provided by the utility model, has the advantages of high automation degree, high efficiency and energy saving.
Description
(1), technical field: the utility model relates to a kind of rectification feedback device, particularly a kind of rectification feedback device that is used for dam crest and tail water door machine.
(2), background technology: at present, the electrical control of the portal hoist that the hydroelectric station of China is used majority adopts the modes of speed regulation of traditional coiling electric motor rotor crosstalk resistance, and there is following problem in it:
(1) drive motor power is big, and big electric current impacts electrical network during starting, and waste of energy is serious.
(2) crane lifting, dolly, cart starting, excessive velocities when stopping, and all be inertia load, mechanical shock is also bigger, and plant equipment shortens useful life, and operating personnel's coefficient of safety is relatively poor, and the equipment operation reliability is lower.
(3) because the winding motor speed governing is through the major control element in the electrical drive system---A.C. contactor inserts and breaks off the resistance that is connected in series on the motor rotor, under the bigger state of current ratio, burns out contact easily.Thereby equipment failure rate is than higher, and maintenance load is bigger.
(4) in the moment of crane hoisting, elevating motor is discontinuity sometimes, is prone to overload, directly causes motor to damage or wire cable rupture.
(5) be the operating mode that adapts to crane, the repeatable operation that the operating personnel of crane are regular, the electric elements of crane and motor are in big current work state all the time, have reduced the useful life of electric elements and motor.
(6) harmony of crane work is mainly leaned on operating personnel's qualification.Because do not have fixing contact between up-down, cart, three main orders of dolly, when crane was worked, labor intensity of operating staff was bigger, easy fatigue is prone to produce misoperation.
(7) automatization level is lower, does not have sharing of load, data monitoring and communication function.
At present, also have some users to adopt the Frequency Converter Control scheme, but motor is in generating state in the gate decline process continuously; This part energy will be to the dc capacitor charging of RHVC; Cause DC bus-bar voltage to raise, the method that traditional controlling schemes adopts brake unit and resistance is converted into thermal dissipation with the generated energy of motor to be fallen, and does not produce overvoltage with the assurance DC loop; This scheme not only causes the waste of the energy, and DC bus-bar voltage is often unstable, noise is big.
(3), utility model content: the technical problem that the utility model will solve is: to the prior art deficiency, provide a kind of automaticity high, the energy-efficient rectification feedback device that is used for dam crest and tail water door machine.
The technical scheme of the utility model: a kind of rectification feedback device that is used for dam crest and tail water door machine; Contain inlet wire contactor, inlet wire reactor, autotransformer, rectification feedback circuit and inverter; Get into the inlet wire reactor behind the AC power process inlet wire contactor; Autotransformer is parallelly connected with the inlet wire reactor, and the secondary output end of autotransformer is connected with the input of rectification feedback circuit, gets into motor again after the direct current of rectification feedback circuit output is introduced into inverter.
AC power is earlier through getting into the inlet wire contactor behind total A.C. contactor and the lead-in circuit breaker again.
The direct current of rectification feedback circuit output is earlier through getting into motor behind air switch and the fuse again.
Motor is dynamo-electric machine of dam crest door and the dynamo-electric machine of tail water door.
In the course of work of this rectification feedback device, when dam crest door machine port-cullis door was mentioned, motor was in motoring condition; Energy arrives motor from AC network through rectification feedback circuit, inverter; The rectification feedback circuit is operated in the rectification pattern, and what difference this state and common frequency converter connecting resistance scheme do not have, but dam crest door machine port-cullis door is when transferring continuously; Motor is in power generation mode, and this portion of energy is charged to DC side through inverter.
Under the traditional braking resistance control model, DC charging causes direct voltage to raise, and release voltage consumes with the heat energy form to resistance when being higher than the brake unit threshold value.After adopting the rectification feedback device, it carries out regulating and controlling to direct voltage, guarantees that dc voltage stability is steady.When the rectification feedback circuit is in the feedback pattern; The energy that electric power generation is produced feeds back to AC network; So not only avoided under the traditional resistor controlling schemes electric energy being converted into the energy waste that heat energy causes the operation of having stablized, improved other mechanisms that has also reduced heating, kept direct voltage.
Along with the implementation energetically of national energy-saving and emission-reduction policy, the water generating industry is more and more, causes dam crest door machine requirement to increase, and this rectification feedback device is used for the industry can produce bigger economic benefit, has bigger market prospects.
The beneficial effect of the utility model: 1, the utility model feeds back to electrical network with the generated energy of dam crest and the dynamo-electric machine of tail water door, supplies other mechanism's motoring conditions to use, and saves energy reduces operating cost.
2, the utility model is not to fall the energy of generating with thermal dissipation through brake unit and brake resistance, solved the caloric value that traditional control method brings big, take problems such as platform space, noise are big.
3, it is stable that the utility model can be kept the voltage of dc bus, avoided the dc voltage fluctuation under the traditional control method big, influences the shortcoming of the speed adjusting performance of other inversions.
(4), description of drawings:
Fig. 1 is the operation principle block diagram that is used for the rectification feedback device of dam crest and tail water door machine.
(5), embodiment: referring to Fig. 1; Among the figure; The rectification feedback device that is used for dam crest and tail water door machine contains inlet wire contactor, inlet wire reactor, autotransformer, rectification feedback circuit and inverter, gets into the inlet wire reactor behind the AC power process inlet wire contactor, and autotransformer is parallelly connected with the inlet wire reactor; The secondary output end of autotransformer is connected with the input of rectification feedback circuit, gets into motor again after the direct current of rectification feedback circuit output is introduced into inverter.
AC power is earlier through getting into the inlet wire contactor behind total A.C. contactor and the lead-in circuit breaker again.
The direct current of rectification feedback circuit output is earlier through getting into motor behind air switch and the fuse again.
Motor is dynamo-electric machine of dam crest door and the dynamo-electric machine of tail water door.
In the course of work of this rectification feedback device, when dam crest door machine port-cullis door was mentioned, motor was in motoring condition; Energy arrives motor from AC network through rectification feedback circuit, inverter; The rectification feedback circuit is operated in the rectification pattern, and what difference this state and common frequency converter connecting resistance scheme do not have, but dam crest door machine port-cullis door is when transferring continuously; Motor is in power generation mode, and this portion of energy is charged to DC side through inverter.
Under the traditional braking resistance control model, DC charging causes direct voltage to raise, and release voltage consumes with the heat energy form to resistance when being higher than the brake unit threshold value.After adopting the rectification feedback device, it carries out regulating and controlling to direct voltage, guarantees that dc voltage stability is steady.When the rectification feedback circuit is in the feedback pattern; The energy that electric power generation is produced feeds back to AC network; So not only avoided under the traditional resistor controlling schemes electric energy being converted into the energy waste that heat energy causes the operation of having stablized, improved other mechanisms that has also reduced heating, kept direct voltage.
Claims (4)
1. rectification feedback device that is used for dam crest and tail water door machine; Contain inlet wire contactor, inlet wire reactor, autotransformer, rectification feedback circuit and inverter; It is characterized in that: get into the inlet wire reactor behind the AC power process inlet wire contactor; Autotransformer is parallelly connected with the inlet wire reactor, and the secondary output end of autotransformer is connected with the input of rectification feedback circuit, gets into motor again after the direct current of rectification feedback circuit output is introduced into inverter.
2. the rectification feedback device that is used for dam crest and tail water door machine according to claim 1 is characterized in that: said AC power is earlier through getting into the inlet wire contactor behind total A.C. contactor and the lead-in circuit breaker again.
3. the rectification feedback device that is used for dam crest and tail water door machine according to claim 1 is characterized in that: the direct current of said rectification feedback circuit output is earlier through getting into motor behind air switch and the fuse again.
4. the rectification feedback device that is used for dam crest and tail water door machine according to claim 1 is characterized in that: said motor is dynamo-electric machine of dam crest door and the dynamo-electric machine of tail water door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203903134U CN202260489U (en) | 2011-10-14 | 2011-10-14 | Rectification feedback device for dam crest gantry crane and tailwater gantry crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203903134U CN202260489U (en) | 2011-10-14 | 2011-10-14 | Rectification feedback device for dam crest gantry crane and tailwater gantry crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202260489U true CN202260489U (en) | 2012-05-30 |
Family
ID=46121673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203903134U Expired - Fee Related CN202260489U (en) | 2011-10-14 | 2011-10-14 | Rectification feedback device for dam crest gantry crane and tailwater gantry crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202260489U (en) |
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2011
- 2011-10-14 CN CN2011203903134U patent/CN202260489U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20141014 |
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| EXPY | Termination of patent right or utility model |