CN203590120U - Variable-frequency speed regulating system for elevator - Google Patents
Variable-frequency speed regulating system for elevator Download PDFInfo
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- CN203590120U CN203590120U CN201320863416.7U CN201320863416U CN203590120U CN 203590120 U CN203590120 U CN 203590120U CN 201320863416 U CN201320863416 U CN 201320863416U CN 203590120 U CN203590120 U CN 203590120U
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- pwm inverter
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- inverter
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- 230000001105 regulatory Effects 0.000 title abstract 3
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000000051 modifying Effects 0.000 abstract 1
- 230000001172 regenerating Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model discloses a variable-frequency speed regulating system for an elevator. The variable-frequency speed regulating system comprises a main loop and a control loop, wherein the main loop comprises a power grid, a PWM (Pulse Width Modulation) rectifier, an inductor, a PWM inverter and an elevator motor which are electrically connected in sequence; the control loop comprises a central processor, a PWM rectifier driving circuit connected between the PWM rectifier and the central processor, a PWM inverter driving circuit connected between the PWM inverter and the central processor, a rotating speed detection circuit connected between the elevator motor and the central processor, a voltage detection circuit for measuring the voltage of a direct-current side between the PWM rectifier and the PWM inverter, a direct-current detection circuit for measuring the current of a direct-current side between the PWM rectifier and the PWM inverter, a load side current detection circuit for measuring the load side current between the PWM inverter and the elevator motor, and a display. By adopting double PWM frequency converters as well as high-inductance filtration in a direct-current loop, direct-current voltage can be reserved rapidly, rapid dynamic response is achieved, and the system runs stably. Equipment is simple, the efficiency is high, and energy is saved.
Description
Technical field
The utility model relates to a kind of Variable Frequency Speed Adjustable System of Mine-hoist, is mainly applicable to mine hoist field.
Background technology
Mine hoist is when transferring weight, and motor is in regenerative power generation state, and regenerated energy raises the DC bus-bar voltage of frequency converter, if do not taken measures, and when busbar voltage rises to a certain degree, frequency converter meeting high voltage protective, out of service.In traditional frequency converter, adopt can not Regenerative feedback voltage-type indirect ac ac converter, rectifying part is uncontrollable diode rectification, a lot of mine hoists adopt brake resistance mode to consume regenerated energy, not only caused the waste of energy, and can cause the temperature of environment to rise, impact is the useful life of electric equipment around.Some frequency converters adopt energy back feed device, motor regenerated energy is fed back to electrical network, but need to increase a set of convertor circuit, cause equipment too fat to move, and cost increases, and control difficulty and increase.
Advanced person's frequency conversion equipment adopts double-PWM frequency converter in the world now, comprise PWM rectifier and PWM inverter, when electric operation, PWM rectifier works in rectification state, and PWM inverter works in inverter mode, when carrying the dynamo-electric machine of body in regenerative power generation state, PWM inverter proceeds to rectification state, PWM rectifier enters inverter mode, can directly electric energy be fed back to electrical network by motor, does not need to increase frequency changer circuit.But the frequency conversion equipment of existing advanced employing double-PWM frequency converter is in the world all to adopt large capacitor filtering in DC link, due to the polarity that electric capacity can clamped down on voltage greatly, DC link can not be reverse rapidly, causes dynamic response slow, affects the even running of system.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of Variable Frequency Speed Adjustable System of Mine-hoist, adopts double-PWM frequency converter, in DC link, adopts large inductor filter, and direct voltage can commutate rapidly, and dynamic response is quick, and system operates steadily.When mine hoist is transferred weight, motor regenerated energy is fed back to electrical network simultaneously, do not need to increase convertor circuit, equipment is simple, energy-efficient.
The technical solution of utility model is as follows:
A Variable Frequency Speed Adjustable System of Mine-hoist, comprises major loop and control loop, and major loop comprises electrical network, PWM rectifier, inductance, PWM inverter and the elevator motor being electrically connected successively.Control loop comprises central processing unit, be connected in the PWM rectifier drive circuit between PWM rectifier and central processing unit, be connected in the PWM inverter driving circuit between PWM inverter and central processing unit, be connected in the speed detect circuit between elevator motor and central processing unit, measure the voltage detecting circuit of the voltage of DC side between PWM rectifier and PWM inverter, measure the D.C. current detecting circuit of the electric current of DC side between PWM rectifier and PWM inverter, measure load-side current detection circuit and the display of load-side electric current between PWM inverter and elevator motor.Voltage detecting circuit, D.C. current detecting circuit, load-side current detection circuit and display are all connected with central processing unit.
PWM rectifier and PWM inverter are IPM Intelligent Power Module.
Beneficial effect:
The utility model Variable Frequency Speed Adjustable System of Mine-hoist, adopts double-PWM frequency converter, in DC link, adopts large inductor filter, and direct voltage can commutate rapidly, and dynamic response is quick, and system operates steadily.When mine hoist is transferred weight, motor regenerated energy is fed back to electrical network simultaneously, do not need to increase convertor circuit, equipment is simple, energy-efficient.
Accompanying drawing explanation
Fig. 1 is the utility model Variable Frequency Speed Adjustable System of Mine-hoist block diagram.
Embodiment
Below with reference to the drawings and specific embodiments, the utility model is described in further details:
As shown in Figure 1, the utility model Variable Frequency Speed Adjustable System of Mine-hoist, comprises major loop and control loop.Major loop comprises electrical network, PWM rectifier, inductance, PWM inverter and the elevator motor being electrically connected successively.Control loop comprises central processing unit, be connected in the PWM rectifier drive circuit between PWM rectifier and central processing unit, be connected in the PWM inverter driving circuit between PWM inverter and central processing unit, be connected in the speed detect circuit between elevator motor and central processing unit, measure the voltage detecting circuit of the voltage of DC side between PWM rectifier and PWM inverter, measure the D.C. current detecting circuit of the electric current of DC side between PWM rectifier and PWM inverter, measure load-side current detection circuit and the display of load-side electric current between PWM inverter and elevator motor.Voltage detecting circuit, D.C. current detecting circuit, load-side current detection circuit and display are all connected with central processing unit.PWM rectifier and PWM inverter are IPM Intelligent Power Module.
Central processing unit is accepted the information that all kinds of testing circuits are carried, and drives as requested PWM rectifier and the work of PWM inverter, shows the operating state of motor simultaneously on display, is in motor-operated running state or in regenerative feedback generating state.Central processing unit can be single-chip microcomputer, can be also dsp controller, in the utility model, only relates to its hardware, does not relate to its software and method.The utility model is only protected its hardware circuit.As for central processing unit, how to accept the information that all kinds of testing circuits are carried, drive as requested PWM rectifier and the work of PWM inverter, the operating state that shows motor on display, belong to prior art, in the < < kinetic control system > > course that the electrical automation of Ge great colleges and universities is offered, tell about.
The utility model Variable Frequency Speed Adjustable System of Mine-hoist, adopts double-PWM frequency converter, in DC link, adopts large inductor filter, and direct voltage can commutate rapidly, and dynamic response is quick, and system operates steadily.When mine hoist is transferred weight, motor regenerated energy is fed back to electrical network simultaneously, do not need to increase convertor circuit, equipment is simple, energy-efficient.
Claims (2)
1. a Variable Frequency Speed Adjustable System of Mine-hoist, comprises major loop and control loop, it is characterized by, and described major loop comprises electrical network, PWM rectifier, inductance, PWM inverter and the elevator motor being electrically connected successively:
Described control loop comprises central processing unit, be connected in the PWM rectifier drive circuit between PWM rectifier and central processing unit, be connected in the PWM inverter driving circuit between PWM inverter and central processing unit, be connected in the speed detect circuit between elevator motor and central processing unit, measure the voltage detecting circuit of the voltage of DC side between PWM rectifier and PWM inverter, measure the D.C. current detecting circuit of the electric current of DC side between PWM rectifier and PWM inverter, measure load-side current detection circuit and the display of load-side electric current between PWM inverter and elevator motor,
Described voltage detecting circuit, D.C. current detecting circuit, load-side current detection circuit and display are all connected with central processing unit.
2. Variable Frequency Speed Adjustable System of Mine-hoist as claimed in claim 1, is characterized by, and described PWM rectifier and PWM inverter are IPM Intelligent Power Module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863416.7U CN203590120U (en) | 2013-12-16 | 2013-12-16 | Variable-frequency speed regulating system for elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863416.7U CN203590120U (en) | 2013-12-16 | 2013-12-16 | Variable-frequency speed regulating system for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590120U true CN203590120U (en) | 2014-05-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320863416.7U Expired - Fee Related CN203590120U (en) | 2013-12-16 | 2013-12-16 | Variable-frequency speed regulating system for elevator |
Country Status (1)
| Country | Link |
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| CN (1) | CN203590120U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350845A (en) * | 2019-07-04 | 2019-10-18 | 冶金自动化研究设计院 | A kind of frequency converter control method based on profinet communication |
-
2013
- 2013-12-16 CN CN201320863416.7U patent/CN203590120U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350845A (en) * | 2019-07-04 | 2019-10-18 | 冶金自动化研究设计院 | A kind of frequency converter control method based on profinet communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EXPY | Termination of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20141216 |