CN201918913U - Special control unit for PWM (pulse-width modulation) rectifier - Google Patents
Special control unit for PWM (pulse-width modulation) rectifier Download PDFInfo
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- CN201918913U CN201918913U CN2010206846209U CN201020684620U CN201918913U CN 201918913 U CN201918913 U CN 201918913U CN 2010206846209 U CN2010206846209 U CN 2010206846209U CN 201020684620 U CN201020684620 U CN 201020684620U CN 201918913 U CN201918913 U CN 201918913U
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- pwm rectifier
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Abstract
The utility model relates to a special control unit for a PWM (pulse-width modulation) rectifier, which is mainly technically characterized by comprising an FPGA (field programmable gate array) module, a DSP (digital signal processing) module, a sampling module and a driving module. The FPGA module is connected with the DSP module in a bus mode, the FPGA module is connected with the sampling module and the driving module via I/O (input/output) interfaces, the sampling module is connected into a PWM rectifier control system for acquiring voltage values, the driving module is connected with an output circuit of the PWM rectifier so as to control the PWM rectifier, the DSP module is connected with a communication module via a CAN (controller area network), and the communication module is connected with a front-end acquisition device of the PWM rectifier control system. The special control unit realizes a control function to the PWM rectifier by means of combining the FPGA module, the DSP module and the sampling module, and has the advantages of high sampling precision and interference resistance and capability of quickly and dynamically responding.
Description
Technical field
The utility model belongs to electric drive converter technique field, especially a kind of PWM rectifier nonshared control unit.
Background technology
Adopt the rectifier of PWM rectifier as universal frequency converter, it is the frequency conversion system rectifier system of the most advanced, the energy-conservation and environmental protection of present technology, adopt the PWM commutation technique of IGBT (insulated gate bipolar transistor) power device, mainly comprise novel electric power electric device engineering application technology, full-digital control technology, the fault diagnosis technology that is applicable to this system, system reliability technology, densification modular organization technology or the like.
Common low voltage frequency converter generally adopts the dynamic braking unit to absorb the braking energy of motor, carries out running under braking.The Frequency Drive that this mode is simple, ripe, price is low, be suitable for often not braking is used, but for frequent braking or need the application of fast braking, the dynamic braking unit that this mode consumes energy greatly, dispose greatly, move uneconomical.Adopting PWM regenerative braking mode at present is the most advanced regenerative braking mode of technology.This unit can be converted to the motor brake energy AC energy feedback AC network fast and efficiently as active inverter, therefore is very suitable for frequent braking or needs the frequency conversion of fast braking to use, and move very economical.But prior PWM rectifier control unit exists that the control sampling precision is low, poor anti jamming capability, dynamic response wait problem slowly.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of high sampling precision, antijamming capability strong and PWM rectifier nonshared control unit that can fast dynamic response.
The utility model solves its technical problem and takes following technical scheme to realize:
A kind of PWM rectifier nonshared control unit, comprise FPGA module, DSP module, sampling module and driver module, the FPGA module is connected by bus mode with the DSP module, the FPGA module is connected with driver module with sampling module by the I/O interface, sampling module is connected to and carries out the magnitude of voltage collection in the PWM rectifier control system, driver module is connected with PWM rectifier output circuit the PWM rectifier is controlled, the DSP module is connected with communication module by the CAN network, and this communication module is connected with the front-end collection equipment of PWM rectifier control system.
And, also be connected with overvoltage surge protection module between described communication module and the PWM rectifier control system.
And described overvoltage surge protection module comprises that overvoltage absorbs protector and surge current inhibitor.
And described PWM rectifier output circuit is for driving 6 road pwm signal phase-locked loops of IGBT two level three-phase rectifiers.
And described FPGA module also connects an output module, and this output module is converted into analog signal with digital signal and is connected on the analog signals oscilloscope.
And described output module adopts the TLV5617 chip to carry out the conversion of digital quantity to analog quantity.
And described driver module is connected and composed by 74HC245 chip and HEF4093 chip.
And described communication module is one of Network Interface Module, CAN interface module and RS48 interface news module or their combination.
And described FPGA module adopts the extensive gate array of EP3C10E144 of CYCLONEIII series, and the DSP module adopts the TMS320LF2812 digital signal processor, and described sampling module adopts the ADS1204 chip.
Advantage of the present utility model and good effect are:
1, FPGA module, DSP module and acquisition module are combined this control unit, realization is to the controlled function of PWM rectifier, has fast operation, can finish three-phase phase-locked loop in 400 μ s, function calculation function such as voltage-regulation, active current adjusting, reactive current adjusting, the conversion of three-phase voltage current actual value, power factor controlling, feed-forward voltage calculating.
2, this control unit adopts high speed, high-precision analog amount sampling A ADS1204 chip to carry out the collection of analog signals, has taken into account sampling precision and sample rate and cost problem.
3, this control unit used overvoltage surge protection module before the CAN network, prevented from common mode overvoltage signal and surge impact electric current to occur on the communication cable in the long line transmission, can protect the communications protocol chip well, guaranteed the reliability and stability of communication.
4, this control unit detects by the mode of three-phase phase-locked loop, carries out vector calculus by the FPGA module, has guaranteed the accuracy of electrical network phase tracking and the accuracy of power factor controlling, suppresses the common mode disturbances in the signals transmission effectively.
5, this control unit can satisfy the requirement of observation inner parameter and variable by realizing the Presentation Function of analog signal on output module and the analog signals oscilloscope, has solved in the system debug process observation problem to control unit inner parameter and variable.
Description of drawings
Fig. 1 is the circuit block diagram of utility model;
Fig. 2 is the circuit theory diagrams that the utility model is connected PWM rectifier major loop;
Fig. 3 is the PLL principle of phase lock loop block diagram of FPGA module.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described:
A kind of PWM rectifier nonshared control unit as shown in Figures 1 and 2, comprises FPGA module, DSP module, overvoltage surge protection module, sampling module, output module and driver module.The FPGA module is connected by bus mode with the DSP module, the FPGA module is connected with sampling module, output module and driver module by the I/O interface, sampling module is connected to and carries out the magnitude of voltage collection in the PWM control system, and driver module is connected to 6 road pwm signal phase-locked loops that drive IGBT two level three-phase rectifiers the PWM rectifier is controlled; Output module is converted into analog signal with digital signal and is connected to and carries out the analog quantity demonstration on the analog signals oscilloscope.The DSP module is connected with communication module by the CAN network; communication module is connected with the front-end collection equipment of PWM rectifier control system; between communication module and PWM rectifier control system, also be connected with overvoltage surge protection module; communication module can be one or more in Network Interface Module, CAN interface module and the RS48 interface news module, carries out data communication by network, CAN and RS485 mode.
The FPGA module adopts the extensive gate array of EP3C10E144 of the ALTERA CYCLONEII I of company series, carry out exchanges data by parallel data, address bus between FPGA module and the DSP module, and send synchronizing clock signals by the FPGA module and be used for the DSP module synchronous.FPGA module and sampling module carry out high-precision acquisition function by the serial data bus mode; sampling module adopts the ADS1204 chip as ∑/Δ high speed, high-precision analog amount sampling A; in the FPGA module, adopt the software overvoltage protective module that the magnitude of voltage of gathering is carried out overvoltage protection; this software overvoltage protective module adopts triple integral, three subdifferential modes to solve the response speed problem of analog quantity sampling; can in 1.6 μ s, finish once high-precision analog quantity sampling, realize excess current protective function at a high speed.
The FPGA module detects for the detection of the electric network voltage phase mode by three-phase phase-locked loop, as shown in Figure 3, by pi regulator idle shaft voltage component is adjusted to 0, thereby determines the phase angle of three phase network voltage vector.In the FPGA module, realize mathematical operations such as three-phase voltage coordinate transform, PI adjusting, and assist ∑/Δ analog quantity sampling A, guaranteed the accuracy of electric network voltage phase with high accuracy, high sample rate.The reactive current adjuster can owing to adopt feedfoward control and pi regulator to combine, improve the corresponding speed of reactive current according to the given adjusting of carrying out reactive current, can be controlled in the 10ms.Adopt the three-phase phase-locked loop principle, in CPU, carry out vector calculus, guaranteed the accuracy of electrical network phase tracking and the accuracy of power factor controlling.Because employing ADS1204 acquisition chip carries out analog acquisition and sets analog quantity sampling time sheet according to system switching cycles 400 μ s, satisfied the requirement of sampling precision and sample rate simultaneously, and use mean value sampling and auxiliary to carry out the way of time bias in the DSP program, efficiently solve the signal lag problem that the digital system discretization produces.
Driver module employing+15VDC and-9VDC drives IGBT, the output of FPGA module is sent drive signal and is carried out the 3.3V-5V level conversion by the 74HC245 chip, and auxiliary HEF4093 chip carries out the 5V--15V level conversion, owing to adopt the high-speed level conversion chip, make the delay of rising edge of a pulse and trailing edge to be controlled within the 5ns.
Output module adopt the TLV5617 chip carry out digital quantity to the conversion of analog quantity and the analog signal after will changing output on the analog signals oscilloscope, this chip has 10 analog quantity precision, can satisfy the requirement of observation inner parameter and variable, solve in the system debug process observation problem control unit inner parameter and variable.
The DSP module adopts the TMS320LF2812 digital signal processor, collecting device by CAN network and front end carries out communication, the front-end collection equipment that is connected in the PWM rectifier control system sends to the data of collecting in the DSP module by network interface, CAN interface and RS485 interface, by collection and the mathematical computations function of DSP module realization to the front-end collection devices collect data.For fear of the influence of thunderbolt and surge current, guarantee the stable of CAN network communication.Adopt overvoltage to absorb protector LCDA12 the communications protocol chip is carried out overvoltage protection, adopt surge current inhibitor B82790 to suppress surge current protection communications protocol chip.
It is emphasized that; embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other execution modes that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (9)
1. PWM rectifier nonshared control unit, it is characterized in that: comprise the FPGA module, the DSP module, sampling module and driver module, the FPGA module is connected by bus mode with the DSP module, the FPGA module is connected with driver module with sampling module by the I/O interface, sampling module is connected to and carries out the magnitude of voltage collection in the PWM rectifier control system, driver module is connected with PWM rectifier output circuit the PWM rectifier is controlled, the DSP module is connected with communication module by the CAN network, and this communication module is connected with the front-end collection equipment of PWM rectifier control system.
2. PWM rectifier nonshared control unit according to claim 1 is characterized in that: also be connected with overvoltage surge protection module between described communication module and the PWM rectifier control system.
3. PWM rectifier nonshared control unit according to claim 2 is characterized in that: described overvoltage surge protection module comprises that overvoltage absorbs protector and surge current inhibitor.
4. PWM rectifier nonshared control unit according to claim 1 is characterized in that: described PWM rectifier output circuit is for driving 6 road pwm signal phase-locked loops of IGBT two level three-phase rectifiers.
5. PWM rectifier nonshared control unit according to claim 1 is characterized in that: described FPGA module also connects an output module, and this output module is converted into analog signal with digital signal and is connected on the analog signals oscilloscope.
6. PWM rectifier nonshared control unit according to claim 5 is characterized in that: described output module adopts the TLV5617 chip to carry out the conversion of digital quantity to analog quantity.
7. PWM rectifier nonshared control unit according to claim 1 is characterized in that: described driver module is connected and composed by 74HC245 chip and HEF4093 chip.
8. PWM rectifier nonshared control unit according to claim 1 is characterized in that: described communication module is one of Network Interface Module, CAN interface module and RS48 interface news module or their combination.
9. PWM rectifier nonshared control unit according to claim 1, it is characterized in that: described FPGA module adopts the extensive gate array of EP3C10E144 of CYCLONEIII series, the DSP module adopts the TMS320LF2812 digital signal processor, and described sampling module adopts the ADS1204 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206846209U CN201918913U (en) | 2010-12-28 | 2010-12-28 | Special control unit for PWM (pulse-width modulation) rectifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206846209U CN201918913U (en) | 2010-12-28 | 2010-12-28 | Special control unit for PWM (pulse-width modulation) rectifier |
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| CN201918913U true CN201918913U (en) | 2011-08-03 |
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| CN2010206846209U Expired - Lifetime CN201918913U (en) | 2010-12-28 | 2010-12-28 | Special control unit for PWM (pulse-width modulation) rectifier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387563A (en) * | 2017-09-09 | 2017-11-24 | 珠海格力电器股份有限公司 | A kind of magnetic suspension bearing control method and device |
| CN107994786A (en) * | 2017-11-28 | 2018-05-04 | 合肥华耀电子工业有限公司 | A kind of multi-pulse rectifier |
| CN108055038A (en) * | 2017-12-12 | 2018-05-18 | 深圳市英威腾电气股份有限公司 | A kind of frequency converter and its bearing calibration, analog quantity bearing calibration, system |
-
2010
- 2010-12-28 CN CN2010206846209U patent/CN201918913U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387563A (en) * | 2017-09-09 | 2017-11-24 | 珠海格力电器股份有限公司 | A kind of magnetic suspension bearing control method and device |
| CN107994786A (en) * | 2017-11-28 | 2018-05-04 | 合肥华耀电子工业有限公司 | A kind of multi-pulse rectifier |
| CN108055038A (en) * | 2017-12-12 | 2018-05-18 | 深圳市英威腾电气股份有限公司 | A kind of frequency converter and its bearing calibration, analog quantity bearing calibration, system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110803 |
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| CX01 | Expiry of patent term |