CN203554334U - Low-harmonic soft starter - Google Patents
Low-harmonic soft starter Download PDFInfo
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- CN203554334U CN203554334U CN201320696560.6U CN201320696560U CN203554334U CN 203554334 U CN203554334 U CN 203554334U CN 201320696560 U CN201320696560 U CN 201320696560U CN 203554334 U CN203554334 U CN 203554334U
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- asynchronous motor
- crossing
- stm32 microprocessor
- circuit
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Abstract
The utility model provides a low-harmonic soft starter, which comprises an STM32 microprocessor, a zero-crossing pulse generating circuit, a driving circuit, a bidirectional silicon controlled rectifier and an asynchronous motor, wherein the zero-crossing pulse generating circuit and the driving circuit are respectively connected with the STM32 microprocessor; the zero-crossing pulse generating circuit is connected in parallel with a 220V power grid, and is used for detecting whether the voltage of the 220V power grid crosses a zero point or not and generating a rectangular pulse signal at the zero crossing point; the driving circuit is connected with the bidirectional silicon controlled rectifier, and the bidirectional silicon controlled rectifier is connected in parallel with the 220V power grid after being serially connected with the asynchronous motor; and the bidirectional silicon controlled rectifier can be used for driving the asynchronous motor according to conducted cyclic wave number of control signals output by the STM32 microprocessor. According to the low-harmonic soft starter, the driving circuit is controlled through the STM32 microprocessor to achieve the purpose of decreasing the starting current output by the asynchronous motor, thereby effectively reducing the pollution of current harmonics to the power grid voltage; and the low-harmonic soft starter is simple and compact in structure, can determine the zero-crossing trigger of the starting current, and prevents the occurrence of serious harmonic pollution caused by general soft starters.
Description
Technical field
The utility model belongs to low-voltage electrical field, is specifically related to a kind of low harmonic wave soft initiator.
Background technology
Low harmonic wave soft initiator is a kind of novel product in power electronic technology high speed development.Low harmonic wave soft initiator refers to a kind of embedded integration control system of being combined with power electronic technology based on automatic control technology, its control principle adopts intergranular pipe chopper control technology, by controlling thyristor conducting cycle, realizing motor both end voltage raises gradually, reduce electric motor starting impulse current, the pollution of reduction to voltage electrical network is the regeneration product of traditional self-starter.In the process of starting asynchronous motor, can cause motor to produce secondary pulse torque and impulse current, electrical network and power equipment are impacted, therefore traditional start mode is difficult to meet actual needs.The features such as low harmonic wave soft initiator has non-impact current, has soft stop function, system parameters is adjustable, intelligent protection function, have advantages of that traditional starter is incomparable, therefore many Bian soft initiators of starting asynchronous motor device at present.
But most soft initiator is substantially all by controlling the angle of flow, realizing soft start in currently available technology, this can produce very large current harmonics to electrical network and pollute.
Utility model content
The purpose of this utility model be to provide a kind of simple in structure, reduce starting current, overcome the low harmonic wave soft initiator of harmonic pollution.
The utility model is achieved by the following technical solution:
A low harmonic wave soft initiator, comprises that STM32 microprocessor, zero-crossing pulse produce circuit, drive circuit, bidirectional triode thyristor and asynchronous motor, and described zero-crossing pulse produces circuit and is all connected with STM32 microprocessor with drive circuit; It is in parallel with 220V electrical network that zero-crossing pulse produces circuit, for detection of 220V line voltage zero crossing whether, and at zero crossing place generation rectangular pulse signal; Described drive circuit is connected with bidirectional triode thyristor, after bidirectional triode thyristor is connected with asynchronous motor, more in parallel with 220V electrical network; Described bidirectional triode thyristor is for driving asynchronous motor according to the conducting cycle of the control signal of STM32 microprocessor output.
Low harmonic wave soft initiator described in the utility model has adopted STM32 microprocessor to control the soft starting mode of the cycle of bidirectional triode thyristor (thyristor), compares with hard reboot mode, has reduced the starting current of motor; Compare with the soft starting mode of controlling the angle of flow of thyristor, greatly reduce the current harmonics while starting.The utility model is when the cycle of controlling thyristor starts, cause the half period energy conducting of several grid alternating currents above, full conducting slowly subsequently, can realize like this effect that reduces starting current, can effectively reduce the pollution of current harmonics to electrical network again, thereby make this low harmonic wave soft initiator there is wider practical value.
Low harmonic wave soft initiator described in the utility model produces circuit by zero-crossing pulse and first 220V alternating current is converted to direct current, then adopt two-phase synchrotrans, by power supply A, B two phase voltages, through zero-crossing comparator, obtain three synchronous square-wave signals, through synthetic, within each cycle, obtain the pulse signal of six synchronization zero-cross again; Zero-crossing pulse produces circuit rectangular pulse signal is sent to STM32 microprocessor afterwards, and STM32 microprocessor is processed this signal.Therefore, STM32 microprocessor obtains the pulse train that AC signal produces zero passage, and finally the conducting cycle by the pulse train that produces is input to the bidirectional triode thyristor that drive circuit is controlled, and reaches the soft control to asynchronous machine.It is in parallel with 220V electrical network that zero-crossing pulse produces circuit simultaneously, can realize high-low pressure isolation, can play the effect of protection STM32 microprocessor.Therefore, the utility model has not only been realized voltage zero-crossing point of power grid has been detected, conducting while controlling loss thyristor zero-voltage; completing the low harmonic wave of motor starts; and the circuit structure that makes this low harmonic wave soft initiator is more simple compact, intelligent protection control appliance more, longer service life.
Preferably, described asynchronous motor is two-phase AC asynchronous motor.
So arrange, in order to make two-phase AC asynchronous motor soft initiator can allow microcontroller better monitor, keep the control impuls in two-phase alternating current source and the strict phase relation of maintenance of controllable silicon anode voltage, make to record result more obvious.Certainly, described asynchronous motor can also be the motor according to actual conditions, such as threephase asynchronous machine.
Preferably, described zero-crossing pulse generation circuit comprises TLP181 opto-coupler chip.
TLP181 opto-coupler chip has the advantages such as volume is little, electrical isolation, good in anti-interference performance, and the zero-crossing pulse that forms three phase mains with its produces circuit, can protect again microcontroller, can make again circuit seem simpler, compact, miniaturization.
Preferably, described drive circuit drives bidirectional triode thyristor by chip MOC3038.
Chip MOC3038 comprises a GaAs infrared light diode and a single piece of silicon detector, can realize the function of voltage zero intersection light isolation bidirectional triode thyristor, can use with bidirectional triode thyristor perfect adaptation below.
Preferably, STM32 microprocessor adopts STM32F103RBT6 chip to realize.
So arrange, can make STM32 microprocessor there is the characteristics such as the high and low power consumption of precision, high-performance.
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing explanation
Fig. 1 is low harmonic wave soft initiator general construction block diagram described in the utility model;
Fig. 2 is the circuit theory diagrams of STM32 microprocessor;
Fig. 3 is the circuit theory diagrams that zero-crossing pulse produces circuit;
Fig. 4 is the circuit theory diagrams of drive circuit.
Embodiment
As shown in Figure 1, the utility model provides a kind of low harmonic wave soft initiator, comprises that STM32 microprocessor, zero-crossing pulse produce circuit, drive circuit and asynchronous motor, and wherein, described asynchronous motor is phase asynchronous motor or some other plant equipment.
Described zero-crossing pulse produces circuit and is all connected with STM32 microprocessor with drive circuit; It is in parallel with 220V electrical network that zero-crossing pulse produces circuit, for detection of 220V line voltage zero crossing whether, and at zero crossing place generation rectangular pulse signal; Described drive circuit is connected with bidirectional triode thyristor, after bidirectional triode thyristor is connected with asynchronous motor, more in parallel with 220V electrical network; Described bidirectional triode thyristor is for driving asynchronous motor according to the conducting cycle of the control signal of STM32 microprocessor output.
The circuit diagram of STM32 microprocessor as shown in Figure 2, STM32 microprocessor adopts STM32F103RBT6 chip to realize, the pin 28 of STM32 microprocessor is connected with one end of the resistance R 4 of drive circuit, the pin 29 of STM32 microprocessor is connected with the collector electrode that zero-crossing pulse produces the triode Q1 of circuit, the pin 1 of STM32 microprocessor and the stabilized voltage power supply VCC(3.3V of peripheral circuit) be connected, pin 8 ground connection of STM32 microprocessor.
The circuit diagram of zero-crossing pulse generation circuit (detecting pulse generation unit by voltage amplitude limit unit, full-wave bridge rectifier unit and voltage zero-cross combines) as shown in Figure 3, zero-crossing pulse produces main circuit will comprise TLP181 opto-coupler chip, resistance R 5, R6, R7, R8, R9, diode D1, D2, D3, D4, D5, D6 and triode Q1, the collector electrode of triode Q1 is connected with the PD4 pin of STM32 microprocessor, base stage is connected with the 4th pin of TLP181 opto-coupler chip, and the 3rd pin of this chip is connected and directly meets GND with emitter.Diode D1, D3, D5, D6 form full-wave bridge rectifier unit jointly, play the effect to the rectification of alternating current.
The circuit diagram of drive circuit as shown in Figure 4, drive circuit mainly comprises capacitor C 1, transistor Q2, resistance R 1, R2, R3, R4 and driving bidirectional triode thyristor chip MOC3038, one end of resistance R 3 is connected with line voltage with one end of bidirectional triode thyristor BTA100-1200B, the other end and capacitor C 1, with effect of playing flow-limiting voltage-stabilizing of electric capacity.The base stage of triode is connected with current-limiting resistance R4, and R4 is directly connected with the PD3 pin of STM32 microprocessor, and collector electrode is connected with the 2nd pin of MOC3083, the direct ground connection of emitter.
The utility model is not only confined to above-mentioned embodiment; persons skilled in the art are according to the disclosed content of the utility model; can adopt other multiple embodiment to implement the utility model; therefore; every employing project organization of the present utility model and thinking; do some simple designs that change or change, all fall into the scope of the utility model protection.
Claims (5)
1. a low harmonic wave soft initiator, is characterized in that, comprises that STM32 microprocessor, zero-crossing pulse produce circuit, drive circuit, bidirectional triode thyristor and asynchronous motor, and described zero-crossing pulse produces circuit and is all connected with STM32 microprocessor with drive circuit; It is in parallel with 220V electrical network that zero-crossing pulse produces circuit, for detection of 220V line voltage zero crossing whether, and at zero crossing place generation rectangular pulse signal; Described drive circuit is connected with bidirectional triode thyristor, after bidirectional triode thyristor is connected with asynchronous motor, more in parallel with 220V electrical network; Described bidirectional triode thyristor is for driving asynchronous motor according to the conducting cycle of the control signal of STM32 microprocessor output.
2. low harmonic wave soft initiator according to claim 1, is characterized in that, described asynchronous motor is two-phase AC asynchronous motor.
3. low harmonic wave soft initiator according to claim 1, is characterized in that, described zero-crossing pulse produces circuit and comprises TLP181 opto-coupler chip.
4. low harmonic wave soft initiator according to claim 1, is characterized in that, described drive circuit drives bidirectional triode thyristor by chip MOC3038.
5. low harmonic wave soft initiator according to claim 1, STM32 microprocessor adopts STM32F103RBT6 chip to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320696560.6U CN203554334U (en) | 2013-11-06 | 2013-11-06 | Low-harmonic soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320696560.6U CN203554334U (en) | 2013-11-06 | 2013-11-06 | Low-harmonic soft starter |
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| Publication Number | Publication Date |
|---|---|
| CN203554334U true CN203554334U (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320696560.6U Expired - Fee Related CN203554334U (en) | 2013-11-06 | 2013-11-06 | Low-harmonic soft starter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017020644A1 (en) * | 2015-08-01 | 2017-02-09 | 漳州科华技术有限责任公司 | Method and apparatus for reducing excitation current of transformer during bypass conducted by isolated ups |
| CN109282458A (en) * | 2018-08-15 | 2019-01-29 | 北京汉美奥科节能设备有限公司 | Change the wind blower coil tube temperature controller of power of motor by changing alternating current cycle |
| CN112255471A (en) * | 2020-06-05 | 2021-01-22 | 浙江华云信息科技有限公司 | Equipment fault uploading technology under application of reactive current pulse signals |
-
2013
- 2013-11-06 CN CN201320696560.6U patent/CN203554334U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017020644A1 (en) * | 2015-08-01 | 2017-02-09 | 漳州科华技术有限责任公司 | Method and apparatus for reducing excitation current of transformer during bypass conducted by isolated ups |
| CN109282458A (en) * | 2018-08-15 | 2019-01-29 | 北京汉美奥科节能设备有限公司 | Change the wind blower coil tube temperature controller of power of motor by changing alternating current cycle |
| CN112255471A (en) * | 2020-06-05 | 2021-01-22 | 浙江华云信息科技有限公司 | Equipment fault uploading technology under application of reactive current pulse signals |
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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: 20140416 Termination date: 20141106 |
|
| EXPY | Termination of patent right or utility model |