CN103825430A - Frequency converter capable of radiating by semiconductor refrigerating plates - Google Patents
Frequency converter capable of radiating by semiconductor refrigerating plates Download PDFInfo
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- CN103825430A CN103825430A CN201410086116.1A CN201410086116A CN103825430A CN 103825430 A CN103825430 A CN 103825430A CN 201410086116 A CN201410086116 A CN 201410086116A CN 103825430 A CN103825430 A CN 103825430A
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Abstract
The invention belongs to the technical field of a frequency converter, and provides a frequency converter capable of radiating by semiconductor refrigerating plates. The frequency converter comprises a structure part and an electrical part, wherein the structure part comprises a plastic shell which is internally provided with a base, a radiator, a direct current (DC) fan, a capacitance plate, the semiconductor refrigerating plates, an insulated gate bipolar translator (IGBT) module, a power panel, a switching power panel and a main control panel; the main control panel is used for controlling the radiator to work normally; the radiator is arranged on the base; the DC fan is fixed at the rear end of the radiator; the capacitance plate is arranged at an air duct hole at the front end of the radiator; and the two semiconductor refrigerating plates are available, and each semiconductor refrigerating plate comprises a cold surface and a hot surface. The frequency converter has the advantages that the heat dissipation design of combining the semiconductor refrigerating plates and air cooling is adopted, and the radiator is cooled by air cooling through the fan, so that the good and reliable cooling effect can be achieved, the cooling effect of the frequency converter is greatly improved, the service life of the frequency converter is prolonged, and the whole reliability is improved.
Description
Technical field
The invention belongs to converter technology field, relate to a kind of its inner inverter power unit module (IGBT) and adopt semiconductor chilling plate and air-cooled coefficient frequency converter.
Background technology
Frequency converter, as a kind of RHVC, relies on its superior control performance and energy-saving effect, and it is widely applied in power electronics, electric drive, Industry Control.Along with petrochemical industry, textile printing and dyeing, metallurgical papermaking, building building etc. every profession and trade is to the improving constantly of frequency converter performance requirement, high controllability, practicality and reliability have become a large index of weighing frequency converter performance.
For the core in frequency converter---the heat dissipation problem of IGBT, it is a large bottleneck of restriction frequency converter industry development always, too high temperature rise will cause the shortening in frequency converter global reliability and useful life, seriously can cause the demolition of inversion module, thereby user's personal safety is caused damage.At present, industry mainly adopts three kinds of modes to dispel the heat, i.e. water-cooled, forced air cooling and natural heat dissipation.Because cost is low, effect better, the radiating mode of forced air cooling becomes the method that each producer generally adopts gradually.Even if but adopting wind-cooling heat dissipating, its temperature rise is also relatively high, can not reach reliable radiating effect.
Summary of the invention
Technical problem to be solved by this invention is the present situation for prior art, and a kind of frequency converter that adopts semiconductor chilling plate heat radiation is provided, this frequency converter improves the radiating effect of frequency converter greatly, thereby reaches the useful life that extends frequency converter, improves the object of global reliability.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of frequency converter that adopts semiconductor chilling plate heat radiation, comprise structure division and electric part, it is characterized in that, described structure division includes plastic casing, in plastic casing, be provided with base, radiator, DC fan, capacitor board, semiconductor chilling plate, IGBT module, power panel, Switching Power Supply plate and master control borad, master control borad control radiator is normally worked, the radiator of described floor installation, rear end at radiator is fixed with DC fan, the front end wind passage mouth of radiator goes out to install capacitor board, described semiconductor chilling plate is altogether two and every and is divided into huyashi-chuuka (cold chinese-style noodles) and hot side, semiconductor chilling plate is fixed on radiator burnishing surface for the heat of huyashi-chuuka (cold chinese-style noodles) is conducted to radiator timely and effectively by hot side, described IGBT module is close to the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate the fastened by screw with the processing of plastic partition thermal sleeve, master control borad and Switching Power Supply plate are positioned over moulds shell top, the stitch of described IGBT module is welded on power panel, the output line of semiconductor chilling plate is electrically connected to respectively the both positive and negative polarity of Switching Power Supply.
The measure of taking for optimization such scheme specifically comprises:
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described semiconductor chilling plate and heat spreader module backplane specifications are in the same size, and on the hot side of two block semiconductor cooling pieces, evenly smear heat-conducting silicone grease, and by its hot side held against heat sink burnishing surface, the surrounding of described semiconductor chilling plate is fixed with heat insulating washer, on huyashi-chuuka (cold chinese-style noodles), equally evenly smear heat-conducting silicone grease, described IGBT module is close to its huyashi-chuuka (cold chinese-style noodles) the fastened by screw with the processing of plastic partition thermal sleeve.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation; described Switching Power Supply plate provides output 24V voltage; in Switching Power Supply plate, mainly comprise oscillation circuit, voltage stabilizing and protection loop composition; when the input side of described oscillation circuit passes into direct current; oscillation circuit starting of oscillation is also exported square wave and after exchange conversion and filter action, is completed 24V Voltage-output and offer semiconductor chilling plate work; voltage stabilizing and protection loop, by the real-time monitoring to output voltage, compare rear automatic adjustment output voltage by signal feedback.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described oscillation circuit comprises startup vibration, high frequency conversion and filter step, the peripheral RC timing elements of 4 pins of the start-up circuit that described oscillation circuit is made up of K3878 switching tube, transformer, UC3844 chip, dropping resistor and electrochemical capacitor and UC3844 thereof form, and the corresponding PWM ripple of starting of oscillation, high frequency conversion and output that described oscillation circuit mainly completes power supply carrys out the break-make speed of control switch pipe.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described voltage stabilizing and protection loop are made up of loop of voltage regulation and protection loop, described voltage stabilizing and protection loop comprise pulse-width modulation, relatively amplify and sampling procedure, described loop of voltage regulation is mainly by reference voltage source TL431, PS2501 photoelectrical coupler, the voltage error amplifier of UC3844 inside and attached Chip-R, the compositions such as electric capacity, main being responsible for feeds back to 3844 chip internal amplification ratios by the 24V voltage change signal of output, thereby the PWM duty ratio of output is changed, complete the constant output of 24V voltage, protection loop one is made up of 3844 chips itself and current sampling resistor and for output current is sampled, chip internal compares output, the failure of oscillation protection of control circuit, the 2nd, by diode in parallel on transformer input winding, chromatic circle resistance and ceramic disc capacitor composition for absorbing the reverse voltage of switching tube.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, the electrical design part of frequency converter comprises the rectifying part of electrical connection successively, charge circuit, filtering part, Converting Unit, control loop part and man-machine interface part, described rectifying part comprise multiple diodes and for by industrial frequency AC electric rectification be pulsation direct current, for subordinate's circuit, described charge circuit is for the inhibition of impact electric current, buffering and live action, described filtering part is for becoming mild by the direct current of pulsation, eliminate peak voltage, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, control loop part comprises isolation drive plate, Switching Power Supply plate and master control borad, control loop part is carried out the effect of regulation and control comprehensively for playing in whole process for major loop, described isolation drive plate is used for exporting corresponding SPWM pulse, thereby control the switching rate of IGBT gate pole, reach the object of regulation output voltage and output frequency, described Switching Power Supply plate is used for reaching to voltage, the real-time control of frequency, master control borad is auxiliary each input signal to be processed for computing and protective circuit, computing, described man-machine interface part is mainly used in the setting of user to its inner parameter, change and supervision and every warning and fault output display.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described charge circuit is made up of charging resistor and contactor, charging resistor is for charging to storage capacitor at powered on moment, play inhibition and the cushioning effect of impact electric current, contactor adhesive then after charging, by charging resistor short circuit, complete powering on of frequency converter.
In above-mentioned a kind of frequency converter that adopts semiconductor chilling plate heat radiation, described filtering part adopts big capacity electrolyte capacitor group and for being responsible for, the direct current of pulsation is become gently, eliminates peak voltage.
Compared with prior art, the invention has the advantages that the frequency converter that adopts semiconductor chilling plate and air-cooled coefficient heat dissipation design, and by blower fan, radiator is carried out to wind-cooling heat dissipating, the temperature of frequency converter entirety will significantly decline like this, finally reach the good object of heat radiation reliably, improve greatly the radiating effect of frequency converter, thereby reach the useful life that extends frequency converter, improve the object of global reliability.
Accompanying drawing explanation
Fig. 1 is to be structure division design drawing of the present invention;
Fig. 2 is this Switching Power Supply plate electrical design system architecture diagram;
Fig. 3 is frequency converter electrical design major loop figure of the present invention.
Embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
In figure, DC fan 11; IGBT module 12; Master control borad 13; Radiator 14; Capacitor board 15; Power panel 16; Switching Power Supply plate 17; Semiconductor chilling plate 18; Oscillation circuit 21; Voltage stabilizing and protection loop 22; Rectifying part 31; Charging resistor 32; Contactor 33; Capacitance group 34; Isolation drive plate 35.
As shown in Figure 1, Figure 2, Figure 3 shows, the frequency converter of this employing semiconductor chilling plate heat radiation, comprises structure division and electric part.
The scheme that wherein structure structural design aspect adopts is: structure division includes plastic casing, in plastic casing, be provided with base, radiator 14, DC fan 11, capacitor board 15, semiconductor chilling plate 18, IGBT module 12, power panel 16, Switching Power Supply plate 17 and master control borad 13, master control borad 13 is controlled radiator 14 and is normally worked, the radiator 14 of floor installation, be fixed with DC fan 11 in the rear end of radiator 14, the front end wind passage mouth of radiator 14 goes out to install capacitor board 15, semiconductor chilling plate 18 is altogether two and every and is divided into huyashi-chuuka (cold chinese-style noodles) and hot side, semiconductor chilling plate 18 is fixed on radiator 14 burnishing surfaces for the heat of huyashi-chuuka (cold chinese-style noodles) is conducted to radiator 14 timely and effectively by hot side, IGBT module 12 is close to the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate 18 fastened by screw with the processing of plastic partition thermal sleeve, semiconductor chilling plate 18 is in the same size with radiator 14 module backplane specifications, and on the hot side of two block semiconductor cooling pieces 18, evenly smear heat-conducting silicone grease, and by its hot side held against heat sink 14 burnishing surfaces, the surrounding of semiconductor chilling plate 18 is fixed with heat insulating washer, like this to prevent scattering and disappearing of heat, on huyashi-chuuka (cold chinese-style noodles), equally evenly smear heat-conducting silicone grease, be beneficial to like this heat of huyashi-chuuka (cold chinese-style noodles) to conduct to timely and effectively on radiator 14 by hot side, IGBT module 12 is close to its huyashi-chuuka (cold chinese-style noodles) the fastened by screw with the processing of plastic partition thermal sleeve, master control borad 13 and Switching Power Supply plate 17 are positioned over moulds shell top, the stitch of IGBT module 12 is welded on power panel 16.
Electric part comprises Switching Power Supply plate 17 electric parts and frequency converter electric part, and Switching Power Supply plate 17 provides the 24V voltage of stable output here, and Switching Power Supply plate 17 is interior mainly comprises that oscillation circuit 21, voltage stabilizing and protection loop 22 form.Oscillation circuit 21 comprise start vibration, high frequency conversion and filter step, voltage stabilizing and protection loop 22 by loop of voltage regulation and protection loop form, voltage stabilizing and protection loop 22 comprise pulse-width modulation, relatively amplify and sampling procedure.
Oscillation circuit 21 is made up of the peripheral RC timing elements of 4 pins of the start-up circuit of K3878 switching tube, transformer, UC3844 chip, dropping resistor and 34 one-tenth of electrochemical capacitor groups and UC3844 thereof, and the corresponding PWM ripple of starting of oscillation, high frequency conversion and output that oscillation circuit 21 mainly completes power supply carrys out the break-make speed of control switch pipe.
Loop of voltage regulation is mainly made up of the voltage error amplifier of reference voltage source TL431, PS2501 photoelectrical coupler, UC3844 inside and attached Chip-R, electric capacity etc., main being responsible for feeds back to 3844 chip internal amplification ratios by the 24V voltage change signal of output, thereby the PWM duty ratio of output is changed, complete the constant output of 24V voltage.
Protection loop one is made up of 3844 chips itself and current sampling resistor etc., and the 2nd, formed by diode (BYV26G), chromatic circle resistance (100K, 3W) and the ceramic disc capacitor of parallel connection on transformer input winding (103,2KV).The former is mainly to output current sampling, and chip internal compares output, the failure of oscillation protection of control circuit.The latter's effect is the reverse voltage that absorbs switching tube.
The design of 24V Switching Power Supply plate 17 will be completed above, on this basis, the black outer lead of the red outer lead of a slice semiconductor chilling plate 18 and another sheet cooling piece is connected and fixed, again two cooling pieces are distinguished to remaining black and red outer lead exact connect ion negative pole and the positive pole to 24V Switching Power Supply plate 17, complete both being connected in series, so just, integral layout and the electrical design of semiconductor chilling plate 18 have been completed, in the time of frequency converter and Switching Power Supply energising operation, the heat of IGBT module 12 bottom surfaces is by the conducting on the radiator 14 contacting with hot side rapidly and efficiently of the huyashi-chuuka (cold chinese-style noodles) by semiconductor chilling plate 18, and then by blower fan, radiator 14 is carried out to wind-cooling heat dissipating, the temperature of frequency converter entirety will significantly decline like this, finally reach the good object of heat radiation reliably.
The electrical design part of frequency converter comprises the rectifying part 31 of electrical connection successively, charge circuit, filtering part, Converting Unit, control loop part and man-machine interface part, rectifying part 31 comprise multiple diodes and for by industrial frequency AC electric rectification be pulsation direct current, for subordinate's circuit, charge circuit is for the inhibition of impact electric current, buffering and live action, filtering part adopts big capacity electrolyte capacitor, and for the direct current of pulsation is become to mild, eliminate peak voltage, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, control loop part comprises isolation drive plate 35, Switching Power Supply plate 17 and master control borad 13, control loop part is carried out the effect of regulation and control comprehensively for playing in whole process for major loop, mainly be distributed as switching power circuit, drive circuit, testing circuit, protective circuit and governor circuit etc.Switching Power Supply is mainly made up of 3844 switching power source chips, switching tube, transformer and other voltage stabilizings and calibration circuit, and being used for provides multichannel stabilized power supply for subordinate's circuit; Drive circuit is exported corresponding SPWM pulse by main control chip and auxiliary circuit; thereby control the switching rate of IGBT module 12 gate poles; testing circuit mainly carries out amplification and the comparison of signal by operational amplifier and auxiliary circuit to sampling resistor, realize every defencive function.Master control borad 13 mainly completes every control function of frequency converter in the calculation process of signal and the output of every analog quantity, switching value and temperature detection.
Charge circuit is made up of charging resistor 32 and contactor 33, charging resistor 32, for charging to storage capacitor at powered on moment, plays inhibition and the cushioning effect of impact electric current, contactor 33 meeting adhesives then after charging, by charging resistor 32 short circuits, complete powering on of frequency converter.
As shown in Figure 3 when input passes into after three-phase electricity, the rectifying part 31 of diode composition is carried out rectification, alternating current is converted to the direct current of pulsation, giving capacitance group 34 by charging resistor 32 again charges, after treating that capacitance group 34 is full of, contactor 33 receives adhesive signal, by its short circuit, then filter circuit carries out flat ripple effect, finally, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, Switching Power Supply plate 17 and master control borad 13 play for major loop and carry out the effect of regulation and control comprehensively in whole process, wherein Switching Power Supply plate 17 can pass through drive circuit, Switching Power Supply part, testing circuit, protective circuits etc. reach voltage, the real-time control of frequency, wherein master control borad 13 can be take DSP main control chip as core, other computings and protective circuit are auxiliary each input signal to be processed, computing, thereby reach every control effect.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from the defined scope of spirit of the present invention.
Claims (8)
1. one kind adopts the frequency converter of semiconductor chilling plate heat radiation, comprise structure division and electric part, it is characterized in that, described structure division includes plastic casing, in plastic casing, be provided with base, radiator, DC fan, capacitor board, semiconductor chilling plate, IGBT module, power panel, Switching Power Supply plate and master control borad, master control borad control radiator is normally worked, the radiator of described floor installation, rear end at radiator is fixed with DC fan, the front end wind passage mouth of radiator goes out to install capacitor board, described semiconductor chilling plate is altogether two and every and is divided into huyashi-chuuka (cold chinese-style noodles) and hot side, semiconductor chilling plate is fixed on radiator burnishing surface for the heat of huyashi-chuuka (cold chinese-style noodles) is conducted to radiator timely and effectively by hot side, described IGBT module is close to the huyashi-chuuka (cold chinese-style noodles) of semiconductor chilling plate the fastened by screw with the processing of plastic partition thermal sleeve, master control borad and Switching Power Supply plate are positioned over moulds shell top, the stitch of described IGBT module is welded on power panel, the output line of semiconductor chilling plate is electrically connected to respectively the both positive and negative polarity of Switching Power Supply.
2. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 1, it is characterized in that, described semiconductor chilling plate and heat spreader module backplane specifications are in the same size, and on the hot side of two block semiconductor cooling pieces, evenly smear heat-conducting silicone grease, and by its hot side held against heat sink burnishing surface, the surrounding of described semiconductor chilling plate is fixed with heat insulating washer, on huyashi-chuuka (cold chinese-style noodles), equally evenly smear heat-conducting silicone grease, described IGBT module is close to its huyashi-chuuka (cold chinese-style noodles) the fastened by screw with the processing of plastic partition thermal sleeve.
3. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 1, it is characterized in that, described Switching Power Supply plate provides output 24V voltage, in Switching Power Supply plate, mainly comprise oscillation circuit, voltage stabilizing and protection loop composition, when the input side of described oscillation circuit passes into direct current, oscillation circuit starting of oscillation is also exported square wave and after exchange conversion and filter action, is completed 24V Voltage-output and offer semiconductor chilling plate work, voltage stabilizing and protection loop are by the real-time monitoring to output voltage, signal feedback is compared to rear automatic adjustment output voltage.
4. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 3, it is characterized in that, described oscillation circuit comprises startup vibration, high frequency conversion and filter step, the peripheral RC timing elements of 4 pins of the start-up circuit that described oscillation circuit is made up of K3878 switching tube, transformer, UC3844 chip, dropping resistor and electrochemical capacitor and UC3844 thereof form, and the corresponding PWM ripple of starting of oscillation, high frequency conversion and output that described oscillation circuit mainly completes power supply carrys out the break-make speed of control switch pipe.
5. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 3, it is characterized in that, described voltage stabilizing and protection loop are made up of loop of voltage regulation and protection loop, described voltage stabilizing and protection loop comprise pulse-width modulation, relatively amplify and sampling procedure, described loop of voltage regulation is mainly by reference voltage source TL431, PS2501 photoelectrical coupler, the voltage error amplifier of UC3844 inside and attached Chip-R, the compositions such as electric capacity, main being responsible for feeds back to 3844 chip internal amplification ratios by the 24V voltage change signal of output, thereby the PWM duty ratio of output is changed, complete the constant output of 24V voltage, protection loop one is made up of 3844 chips itself and current sampling resistor and for output current is sampled, chip internal compares output, the failure of oscillation protection of control circuit, the 2nd, by diode in parallel on transformer input winding, chromatic circle resistance and ceramic disc capacitor composition for absorbing the reverse voltage of switching tube.
6. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 1, it is characterized in that, the electrical design part of frequency converter comprises the rectifying part of electrical connection successively, charge circuit, filtering part, Converting Unit, control loop part and man-machine interface part, described rectifying part comprise multiple diodes and for by industrial frequency AC electric rectification be pulsation direct current, for subordinate's circuit, described charge circuit is for the inhibition of impact electric current, buffering and live action, described filtering part is for becoming mild by the direct current of pulsation, eliminate peak voltage, Converting Unit is converted to direct current alternating current output again, complete the action of whole major loop, control loop part comprises isolation drive plate, Switching Power Supply plate and master control borad, control loop part is carried out the effect of regulation and control comprehensively for playing in whole process for major loop, described isolation drive plate is used for exporting corresponding SPWM pulse, thereby control the switching rate of IGBT gate pole, reach the object of regulation output voltage and output frequency, described Switching Power Supply plate is used for reaching to voltage, the real-time control of frequency, master control borad is auxiliary each input signal to be processed for computing and protective circuit, computing, described man-machine interface part is mainly used in the setting of user to its inner parameter, change and supervision and every warning and fault output display.
7. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 6, it is characterized in that, described charge circuit is made up of charging resistor and contactor, charging resistor is for charging to storage capacitor at powered on moment, play inhibition and the cushioning effect of impact electric current, contactor adhesive then after charging, by charging resistor short circuit, completes powering on of frequency converter.
8. a kind of frequency converter that adopts semiconductor chilling plate heat radiation according to claim 6, is characterized in that, described filtering part adopts big capacity electrolyte capacitor group and for being responsible for, the direct current of pulsation become gently, eliminates peak voltage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410086116.1A CN103825430A (en) | 2014-03-10 | 2014-03-10 | Frequency converter capable of radiating by semiconductor refrigerating plates |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410086116.1A CN103825430A (en) | 2014-03-10 | 2014-03-10 | Frequency converter capable of radiating by semiconductor refrigerating plates |
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| CN103825430A true CN103825430A (en) | 2014-05-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107454799A (en) * | 2017-07-31 | 2017-12-08 | 阳泉煤业（集团）有限责任公司 | Improve the method for power module of converter heat dispersion using semiconductor heat electrical effect |
| CN107781203A (en) * | 2016-08-28 | 2018-03-09 | 上海奇电电气科技股份有限公司 | With the frequency converter for automatically adjusting rate of heat dispation function |
| CN109962481A (en) * | 2019-04-09 | 2019-07-02 | 深圳市恩玖科技有限公司 | A kind of free-standing three level parallel type active power quality devices of three-phase |
| CN114420452A (en) * | 2022-02-10 | 2022-04-29 | 北京国家新能源汽车技术创新中心有限公司 | Structure of thin film capacitor and heat dissipation method |
| CN114916213A (en) * | 2022-07-18 | 2022-08-16 | 爱弗特(徐州)电子有限公司 | Radiator structure of new energy automobile motor control system |
-
2014
- 2014-03-10 CN CN201410086116.1A patent/CN103825430A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107781203A (en) * | 2016-08-28 | 2018-03-09 | 上海奇电电气科技股份有限公司 | With the frequency converter for automatically adjusting rate of heat dispation function |
| CN107454799A (en) * | 2017-07-31 | 2017-12-08 | 阳泉煤业（集团）有限责任公司 | Improve the method for power module of converter heat dispersion using semiconductor heat electrical effect |
| CN109962481A (en) * | 2019-04-09 | 2019-07-02 | 深圳市恩玖科技有限公司 | A kind of free-standing three level parallel type active power quality devices of three-phase |
| CN109962481B (en) * | 2019-04-09 | 2023-04-14 | 深圳市恩玖科技有限公司 | Three-phase independent three-level parallel active power quality device |
| CN114420452A (en) * | 2022-02-10 | 2022-04-29 | 北京国家新能源汽车技术创新中心有限公司 | Structure of thin film capacitor and heat dissipation method |
| CN114420452B (en) * | 2022-02-10 | 2023-10-31 | 北京国家新能源汽车技术创新中心有限公司 | Structure of thin film capacitor and heat dissipation method |
| CN114916213A (en) * | 2022-07-18 | 2022-08-16 | 爱弗特(徐州)电子有限公司 | Radiator structure of new energy automobile motor control system |
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Address after: 317519, 2, North Ring Road, Wenling City, Zhejiang, Taizhou Applicant after: Zhejiang nouveaux riches insult electric incorporated company Address before: 317519, 2, North Ring Road, Wenling City, Zhejiang, Taizhou Applicant before: Taizhou Fuling Electrical Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: TAIZHOU FULING ELECTRIC CO., LTD. TO: ZHEJIANG XINFULING ELECTRIC CO., LTD. |
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Application publication date: 20140528 |