CN203984302U - Two PWM frequency-variable controllers - Google Patents
Two PWM frequency-variable controllers Download PDFInfo
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- CN203984302U CN203984302U CN201420161934.9U CN201420161934U CN203984302U CN 203984302 U CN203984302 U CN 203984302U CN 201420161934 U CN201420161934 U CN 201420161934U CN 203984302 U CN203984302 U CN 203984302U
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Abstract
The utility model relates to frequency converter.Two PWM frequency-variable controllers, comprise a frequency-variable controller main body, and frequency-variable controller main body comprises a control circuit, and control circuit comprises a TMS320LF2407A type dsp chip, an Intelligent Power Module 6MBP20RH060; The gate pole of Intelligent Power Module 6MBP20RH060 connects TMS320LF2407A type dsp chip, and the control end of Intelligent Power Module 6MBP20RH060 connects 12 IGBT pipes; TMS320LF2407A type dsp chip pwm signal connects a power drive chip I R2130, and power drive chip I R2130 drives the control signal input that connects an Intelligent Power Module 6MBP20RH060.The utility model is based on DSP and SVPWM technology, and hardware configuration is supported two PWM designs.
Description
Technical field
The utility model relates to Motor Control Field, is specifically related to a kind of frequency converter.
Background technology
Frequency converter is as one of the core devices of power electronic technology or equipment, be widely used in the fashion field of household appliances such as air-conditioning, refrigerator, microwave oven, washing machine, the novel frequency modulation and voltage modulation power supply of simultaneously controlling as the transmission of AC and DC motor by a large number for AC-DC speed-regulating control, different field and the occasions such as SERVO CONTROL, Energy Saving Control.
But in adopting the process of frequency converter, the motor that frequency converter is connected with it is as the load of electrical network, and the electromagnetic interference problem bringing is very important.The motor that frequency converter is connected with it is nonlinear load to electrical network, to electrical network output higher harmonic current, causes that line voltage distortion and current distortion cause electromagnetic pollution, affect other electronic electric equipments on electrical network and normally work.
Utility model content
The utility model object is to be to provide a kind of pair of PWM frequency-variable controller.
To achieve these goals, the technical solution of the utility model is as follows:
Two PWM frequency-variable controllers, comprise a frequency-variable controller main body, and described frequency-variable controller main body comprises a control circuit, it is characterized in that, described control circuit comprises a TMS320LF2407A type dsp chip, an Intelligent Power Module 6MBP20RH060;
The gate pole of described Intelligent Power Module 6MBP20RH060 connects described TMS320LF2407A type dsp chip, and described Intelligent Power Module 6MBP20RH060 is provided with 12 IGBT pipes;
Described TMS320LF2407A type dsp chip pwm signal connects a power drive chip I R2130, and described power drive chip I R2130 drives the control signal input that connects an Intelligent Power Module 6MBP20RH060.
The utility model is based on DSP and SVPWM technology, hardware configuration is supported two PWM designs, control circuit allows to adopt advanced PWM Algorithm, inverter and motor are done as a whole, utilize the time manager A of TMS320LF2407A type dsp chip to produce 6 road pwm signals, through power drive chip I R2130, drive Intelligent Power Module 6MBP20RH060 to realize transformation, variable frequency control.Effectively avoid the generation of high order harmonic component, thereby prevented the device damage that causes because of voltage waveform distortion, and reduced radiation.
Described frequency-variable controller main body also comprises an ac power input end, described ac power input end connects a current rectifying and wave filtering circuit, described current rectifying and wave filtering circuit comprises that one becomes three-phase alternating current full-wave rectification into galvanic three-phase commutation bridge, one provides the reactive power buffer circuit of reactive power buffering between inverter negative load DC power supply, one for suppressing the absorption buffer circuit of surge voltage, described three-phase commutation bridge, described reactive power buffer circuit, described absorption buffer circuit is in parallel, Intelligent Power Module 6MBP20RH060 described in described current rectifying and wave filtering circuit connection one.
Described three-phase commutation bridge comprises 6 diode D1, D2, D3, D4, D5, D6, D1, D4 series connection, D3, D6 series connection, D2, D5 series connection;
Described reactive power buffer circuit comprises two electrochemical capacitor C1, C2, C1, C2 series connection;
Described absorption buffer circuit comprises a noninductive resistance R2, a capacitor C 3, R2, C3 series connection.
Described control circuit also comprises a voltage and current detection circuit, and the signal output part of described voltage and current detection circuit connects the A/D unit of described TMS320LF2407A type dsp chip;
Voltage and current detection circuit comprises that one for gathering the LTS25-NP type current sensor of current parameters, described LTS25-NP type current sensor has two, described in one of them, the signals collecting end of LTS25-NP type current sensor connects the DC side of three-phase commutation bridge, and described in another, the signals collecting end of LTS25-NP type current sensor connects the AC of three-phase commutation bridge;
Voltage and current detection circuit comprises that one for gathering the LV28-P type voltage sensor of voltage parameter, described LV28-P type voltage sensor has two, described in one of them, the signals collecting end of LV28-P type voltage sensor connects the DC side of three-phase commutation bridge, and described in another, the signals collecting end of LV28-P type voltage sensor connects the AC of three-phase commutation bridge.
Frequency-variable controller main body, also comprises an inductance component, and one end of described inductance component connects described ac power input end, and the other end of described inductance component connects described current rectifying and wave filtering circuit.In frequency-variable controller body front end, add inductance component, can effectively suppress the interference of frequency-variable controller main body to electrical network, also help minimizing reactive power, reduce electrical network burden, can make frequency-variable controller main body seldom affect the stable operation of motor, realize energy-conserving action.
Described ac power input end is the ac power input end of three-phase alternating-current supply, and described inductance component is connected with one of described ac power input end.
Described ac power input end is the ac power input end of three-phase alternating-current supply, and described frequency-variable controller main body is provided with two inductance components, and described two inductance components are connected with two of described ac power input end respectively.
Described ac power input end is the ac power input end of three-phase alternating-current supply, and described frequency-variable controller main body is provided with three inductance components, and described three inductance components are connected with three of described ac power input end respectively.
Described inductance component adopts wire around the inductance component of magnet ring structure, the ferrite bead that described magnet ring can adopt Ferrite Material to make.Magnet ring has good inhibition high-frequency interferencing signal, does not stop again the effect of normal useful signal.Magnet ring is cheap, can reduce the cost of equipment.
Described frequency-variable controller main body also comprises a ceramic disc capacitor, and described ceramic disc capacitor is in parallel with described inductance component.Ceramic disc capacitor has the effect of eliminating High-frequency Interference, and ceramic disc capacitor in parallel further effectively suppresses the interference of frequency-variable controller main body to electrical network.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, further illustrate the utility model:
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is partial circuit figure of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1 and Fig. 2, two PWM frequency-variable controllers, comprise a frequency-variable controller main body, and frequency-variable controller main body comprises a control circuit, and control circuit comprises a TMS320LF2407A type dsp chip, an Intelligent Power Module 6MBP20RH060; The gate pole of Intelligent Power Module 6MBP20RH060 connects TMS320LF2407A type dsp chip, and Intelligent Power Module 6MBP20RH060 is provided with 12 IGBT pipes; TMS320LF2407A type dsp chip pwm signal connects a power drive chip I R2130, and power drive chip I R2130 drives the control signal input that connects an Intelligent Power Module 6MBP20RH060.The utility model is based on DSP and SVPWM technology, and hardware configuration is supported two PWM designs, and DSP forms computing and control core, with two IPM, forms respectively PWM rectification and PWM inverter power switched circuit.Control circuit allows to adopt advanced PWM Algorithm, inverter and motor are done as a whole, utilize the time manager A of TMS320LF2407A type dsp chip to produce 6 road pwm signals, through power drive chip I R2130, drive Intelligent Power Module 6MBP20RH060 to realize transformation, variable frequency control.Effectively avoid the generation of high order harmonic component, thereby prevented the device damage that causes because of voltage waveform distortion, and reduced radiation.
Intelligent Power Module 6MBP20RH060 adopts the IGBT switching tube of low-power consumption, high-performance, soft switch technique, and built-in overcurrent protection, short-circuit protection, the protection of control under-voltage, overtemperature protection and failure output terminal mouth.Its gate pole triggering signal is from DSP control circuit, controls the break-make of 12 IGBT pipes according to SVPWM control law, and the DC inverter after rectifying and wave-filtering is become to frequency, alternating current that amplitude is adjustable, and this is the execution link that frequency converter is realized frequency conversion.
Frequency-variable controller main body also comprises an ac power input end, ac power input end connects a current rectifying and wave filtering circuit, current rectifying and wave filtering circuit comprises that one becomes three-phase alternating current full-wave rectification into galvanic three-phase commutation bridge, and between inverter negative load DC power supply, provides the reactive power buffer circuit, of reactive power buffering for suppressing the absorption buffer circuit of surge voltage, three-phase commutation bridge, reactive power buffer circuit, the parallel connection of absorption buffer circuit, current rectifying and wave filtering circuit connects an Intelligent Power Module 6MBP20RH060.Three-phase commutation bridge comprises 6 diode D1, D2, D3, D4, D5, D6, D1, D4 series connection, D3, D6 series connection, D2, D5 series connection; Reactive power buffer circuit comprises two electrochemical capacitor C1, C2, C1, C2 series connection; Absorb buffer circuit and comprise a noninductive resistance R2, a capacitor C 3, R2, C3 series connection.
Control circuit also comprises a voltage and current detection circuit.Direct voltage detection signal is taken from R3, R1 bleeder circuit, after photoelectricity isolation and signal are left under order, sends into DSP control circuit, realizes overvoltage, under-voltage protection.Current detection signal is taken from resistance R 5, and signal is given the PDPINT pin of DSP after amplifying, relatively processing; Once generation overcurrent condition, frequency converter turn-offs all control signals, realizes overcurrent protection.
The signal output part of voltage and current detection circuit connects the A/D unit of TMS320LF2407A type dsp chip; Voltage and current detection circuit comprises that one for gathering the LTS25-NP type current sensor of current parameters, LTS25-NP type current sensor has two, the signals collecting end of one of them LTS25-NP type current sensor connects the DC side of three-phase commutation bridge, and the signals collecting end of another LTS25-NP type current sensor connects the AC of three-phase commutation bridge; Voltage and current detection circuit comprises that one for gathering the LV28-P type voltage sensor of voltage parameter, LV28-P type voltage sensor has two, the signals collecting end of one of them LV28-P type voltage sensor connects the DC side of three-phase commutation bridge, and the signals collecting end of another LV28-P type voltage sensor connects the AC of three-phase commutation bridge.LTS25-NP type current sensor, can measure DC quantity, of ac and pulsed quantity, can select as required ± 25A, ± 12A, tri-kinds of measuring ranges of ± 8A response time≤200ns, output voltage 2.5 ± 0.6V.For the performance of good utilisation A/D converter more, existing voltage range is brought up to 7.6～12.4V, then compare with reference voltage VREF, modulation 0～4.8V sends into the A/D unit of DSP.LV28-P type voltage sensor, can be for measuring direct current, interchange and pulse voltage.Performance is: operating voltage 15V ±, measuring range 10～500V, the specified effective current Ipn=10mA of rim, become specified effective value electric current I pn=25mA again, the comfortable electric current of secondary converts voltage to through storekeeper, export-restriction, between 0～5V, is sent into the A/D unit of DSP.
Frequency-variable controller main body, also comprises an inductance component, and one end of inductance component connects ac power input end, and the other end of inductance component connects current rectifying and wave filtering circuit.In frequency-variable controller body front end, add inductance component, can effectively suppress the interference of frequency-variable controller main body to electrical network, also help minimizing reactive power, reduce electrical network burden, can make frequency-variable controller main body seldom affect the stable operation of motor, realize energy-conserving action.
Can ac power input end the ac power input end that is three-phase alternating-current supply, inductance component is connected with one of ac power input end.The ac power input end all right, ac power input end is three-phase alternating-current supply, frequency-variable controller main body is provided with two inductance components, and two inductance components are connected with two of ac power input end respectively.The ac power input end all right, ac power input end is three-phase alternating-current supply, frequency-variable controller main body is provided with three inductance components, and three inductance components are connected with three of ac power input end respectively.
Inductance component adopts wire around the inductance component of magnet ring structure, the ferrite bead that magnet ring can adopt Ferrite Material to make.Magnet ring has good inhibition high-frequency interferencing signal, does not stop again the effect of normal useful signal.Magnet ring is cheap, can reduce the cost of equipment.Frequency-variable controller main body also comprises a ceramic disc capacitor, and ceramic disc capacitor is in parallel with inductance component.Ceramic disc capacitor has the effect of eliminating High-frequency Interference, and ceramic disc capacitor in parallel further effectively suppresses the interference of frequency-variable controller main body to electrical network.
Frequency-variable controller main body also comprises a shell, is also provided with a radio-frequency (RF) tag on shell, is provided with the memory module of the parameter information that stores two PWM frequency-variable controllers in radio-frequency (RF) tag.How by nameplate, to enumerate out parameter information in the past, but limited by the size of nameplate, the parameter information that nameplate shows is limited often, stores the relevant information of the utility model parameter by radio-frequency (RF) tag, can expand parameter information amount.
Shell is an electromagnetic shielding plastic housing of being made by electromagnetic shielding plastic, and electromagnetic shielding plastic housing comprises plastic layer, is embedded with conductive fiber layer in plastic layer, and conductive fiber layer is the fibrage of being made by conductive fiber.The utility model had both had plastic product and had been easy to the feature being shaped, also there is the radiation-resistant feature of electromagnetic shielding that electric conducting material just possesses, make the utility model antijamming capability strong, strengthened stability of the present utility model, and then also strengthened the stability of control system internal components work.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. pair PWM frequency-variable controller, comprises a frequency-variable controller main body, and described frequency-variable controller main body comprises a control circuit, it is characterized in that, described control circuit comprises a TMS320LF2407A type dsp chip, an Intelligent Power Module 6MBP20RH060;
The gate pole of described Intelligent Power Module 6MBP20RH060 connects described TMS320LF2407A type dsp chip, and described Intelligent Power Module 6MBP20RH060 is provided with 12 IGBT pipes;
Described TMS320LF2407A type dsp chip pwm signal connects a power drive chip I R2130, and described power drive chip I R2130 drives the control signal input that connects an Intelligent Power Module 6MBP20RH060;
Described frequency-variable controller main body also comprises an ac power input end, and described ac power input end connects a current rectifying and wave filtering circuit;
Also comprise an inductance component, one end of described inductance component connects described ac power input end, and the other end of described inductance component connects described current rectifying and wave filtering circuit;
Described inductance component adopts wire around the inductance component of magnet ring structure, the ferrite bead that described magnet ring can adopt Ferrite Material to make;
Described frequency-variable controller main body also comprises a ceramic disc capacitor, and described ceramic disc capacitor is in parallel with described inductance component.
2. according to claim 1 pair of PWM frequency-variable controller, it is characterized in that: described current rectifying and wave filtering circuit comprises that one becomes three-phase alternating current full-wave rectification into galvanic three-phase commutation bridge, and between inverter negative load DC power supply, provides the reactive power buffer circuit, of reactive power buffering for suppressing the absorption buffer circuit of surge voltage, described three-phase commutation bridge, described reactive power buffer circuit, described absorption buffer circuit are in parallel, described current rectifying and wave filtering circuit connect one described in Intelligent Power Module 6MBP20RH060.
3. according to claim 2 pair of PWM frequency-variable controller, is characterized in that: described three-phase commutation bridge comprises 6 diode D1, D2, D3, D4, D5, D6, D1, D4 series connection, D3, D6 series connection, D2, D5 series connection;
Described reactive power buffer circuit comprises two electrochemical capacitor C1, C2, C1, C2 series connection;
Described absorption buffer circuit comprises a noninductive resistance R2, a capacitor C 3, R2, C3 series connection.
4. according to claim 1 pair of PWM frequency-variable controller, is characterized in that: described control circuit also comprises a voltage and current detection circuit, and the signal output part of described voltage and current detection circuit connects the A/D unit of described TMS320LF2407A type dsp chip;
Voltage and current detection circuit comprises that one for gathering the LTS25-NP type current sensor of current parameters, described LTS25-NP type current sensor has two, described in one of them, the signals collecting end of LTS25-NP type current sensor connects the DC side of three-phase commutation bridge, and described in another, the signals collecting end of LTS25-NP type current sensor connects the AC of three-phase commutation bridge;
Voltage and current detection circuit comprises that one for gathering the LV28-P type voltage sensor of voltage parameter, described LV28-P type voltage sensor has two, described in one of them, the signals collecting end of LV28-P type voltage sensor connects the DC side of three-phase commutation bridge, and described in another, the signals collecting end of LV28-P type voltage sensor connects the AC of three-phase commutation bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420161934.9U CN203984302U (en) | 2014-04-03 | 2014-04-03 | Two PWM frequency-variable controllers |
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| CN201420161934.9U CN203984302U (en) | 2014-04-03 | 2014-04-03 | Two PWM frequency-variable controllers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104660148A (en) * | 2015-03-16 | 2015-05-27 | 深圳市步科电气有限公司 | AC speed adjusting device of frequency converter |
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2014
- 2014-04-03 CN CN201420161934.9U patent/CN203984302U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104660148A (en) * | 2015-03-16 | 2015-05-27 | 深圳市步科电气有限公司 | AC speed adjusting device of frequency converter |
| CN104660148B (en) * | 2015-03-16 | 2018-03-30 | 深圳市步科电气有限公司 | A kind of frequency converter AC speed regulator |
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| 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: 20141203 Termination date: 20160403 |
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| CF01 | Termination of patent right due to non-payment of annual fee |