WO2013121589A1 - 電力変換装置、及び電力変換システム - Google Patents
電力変換装置、及び電力変換システム Download PDFInfo
- Publication number
- WO2013121589A1 WO2013121589A1 PCT/JP2012/053880 JP2012053880W WO2013121589A1 WO 2013121589 A1 WO2013121589 A1 WO 2013121589A1 JP 2012053880 W JP2012053880 W JP 2012053880W WO 2013121589 A1 WO2013121589 A1 WO 2013121589A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power conversion
- frequency
- power
- candidate
- power converter
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
Definitions
- the present invention relates to a power conversion device and a power conversion system.
- information communication may be performed between the plurality of semiconductor power conversion devices in order to control the plurality of semiconductor power conversion devices in a coordinated manner.
- information communication is performed between a plurality of semiconductor power converters, it is common to perform communication using a dedicated communication line.
- a dedicated communication line is laid, man-hours are required, and noise current may flow through the communication line, causing trouble due to noise.
- Patent Document 1 in a power line carrier communication system in which a plurality of lighting devices are connected to a power line, a lighting device of a parent device transmits a signal to the lighting devices of each child device by common mode communication. It is described that the lighting state of each slave unit is controlled to be interlocked with the lighting state of the unit. Specifically, in the lighting device of the master unit, the control unit controls the on / off of the field effect transistor according to a signal for controlling the lighting state of the lighting device of the slave unit, and is formed by the magnitude of the amplitude of the waveform flowing to the ground side. The transmitted signal is transmitted to the lighting device of the slave unit by common mode communication.
- the detection circuit receives a signal transmitted by common mode communication by inputting a signal having a rectangular waveform by extracting a signal component through a ground capacitor to the control unit.
- Patent Document 1 is a method for detecting the magnitude of the voltage amplitude with respect to the ground of the power line, it is difficult to perform bidirectional communication or communication between three or more devices on the same power line.
- the amplitude changes depending on the impedance of the power line, depending on the system, there is a concern that the signal level needs to be individually adjusted or the reliability of communication is lowered.
- This invention is made in view of the above, Comprising: It aims at obtaining the power converter device and power conversion system which can communicate the voltage signal to earth according to information, and can reduce the manufacturing cost of the transmission side .
- a power converter is a power converter connected to a second power converter through a power supply line and a ground line.
- a carrier signal generation unit that switches to a frequency selected from a plurality of candidate frequencies or candidate frequency ranges according to information to be transmitted to the second power conversion device and generates a carrier signal having the switched frequency.
- a PWM signal generation unit that generates a PWM signal using the generated carrier signal, and a switching element for controlling a control target, and performs switching according to the generated PWM signal to perform power conversion.
- a ground voltage signal corresponding to the information to be transmitted through the power supply line and the ground line. Characterized by comprising a switching element to be transmitted to the serial second power converter.
- the switching operation of the switching element serves as both an operation for power conversion and an operation for transmitting an anti-ground voltage signal.
- the ground voltage signal corresponding to the information to be transmitted is transmitted from the transmission-side power conversion device to the reception-side power conversion device without adding a large-scale circuit configuration dedicated to communication in the transmission-side power conversion device. Can be sent. That is, it is possible to communicate an anti-ground voltage signal corresponding to information and to reduce the manufacturing cost on the transmission side.
- FIG. 1 is a diagram illustrating a configuration of the power conversion system according to the first embodiment.
- FIG. 2 is a diagram illustrating a configuration of the power conversion system according to the first embodiment.
- FIG. 3 is a diagram illustrating an operation of the power conversion system according to the first embodiment.
- FIG. 4 is a diagram illustrating a configuration of the switching element according to the first embodiment.
- FIG. 5 is a diagram showing a configuration of the carrier signal frequency extraction unit in the first embodiment.
- FIG. 6 is a diagram showing a configuration of the carrier signal frequency extraction unit in the modification of the first embodiment.
- FIG. 7 is a diagram illustrating the operation of the carrier signal frequency extraction unit in the modification of the first embodiment.
- FIG. 8 is a diagram illustrating a configuration of a power conversion system according to another modification of the first embodiment.
- FIG. 9 is a diagram of a configuration of the power conversion system according to the second embodiment.
- FIG. 10 is a diagram showing the configuration and operation of the carrier signal frequency extraction unit in the second embodiment.
- FIG. 11 is a diagram illustrating a configuration of a carrier signal frequency extraction unit in a modification of the second embodiment.
- FIG. 12 is a diagram illustrating the operation of the carrier signal frequency extraction unit in the modification of the second embodiment.
- FIG. 13 is a diagram of a configuration of the power conversion system according to the third embodiment.
- FIG. 14 is a diagram illustrating the configuration and operation of the carrier signal frequency extraction unit in the fourth embodiment.
- FIG. 15 is a diagram illustrating the configuration and operation of the carrier signal frequency extraction unit in the fifth embodiment.
- FIG. 16 is a diagram illustrating the operation of the carrier signal frequency extraction unit in the modification of the fifth embodiment.
- FIG. 17 is a diagram illustrating a comparative example.
- FIG. 18 is a diagram illustrating a comparative example.
- FIG. 1 is a diagram illustrating a configuration of the power conversion system 1.
- the power conversion system 1 performs a predetermined power conversion operation and controls a plurality of control objects M1 and M2.
- the control objects M1 and M2 are, for example, a motor or a machine.
- the power conversion system 1 includes a power supply device 2, a power conversion device 10, and a power conversion device 20.
- the power supply device 2 is connected to the power conversion device 10 and the power conversion device 20 via the power supply line Lp and the power supply line Ln.
- the power conversion device 10 and the power conversion device 20 are connected to the power supply device 2 in parallel.
- the power supply device 2 generates DC power, and supplies the generated DC power to each of the power conversion device 10 and the power conversion device 20 via the power supply line Lp and the power supply line Ln.
- the power conversion device 10 is connected to the power supply device 2 and the power conversion device 20 via the power supply line Lp and the power supply line Ln.
- the power conversion device 10 is connected to the ground potential via the ground wire Le.
- the power conversion device 10 is connected to the control target M1 through power lines Lu1, Lv1, and Lw1.
- the power conversion device 10 receives DC power from the power supply device 2 through the power supply line Lp and the power supply line Ln.
- the power converter 10 performs a power conversion operation for converting DC power into AC power in the main circuit 10a. Specifically, the plurality of switching elements 15-up to 15-wn (see FIG. 4) in the main circuit 10a are turned on and off at predetermined timings.
- the power converter 10 supplies the converted AC power to the control target M1 via the power lines Lu1, Lv1, and Lw1. Thereby, the power converter device 10 carries out drive control of the control object M1.
- the power conversion device 20 is connected to the power supply device 2 and the power conversion device 10 via the power supply line Lp and the power supply line Ln.
- the power conversion device 10 is connected to the ground potential via the ground wire Le.
- the power converter 20 is connected to the controlled object M2 via the power lines Lu2, Lv2, and Lw2.
- the power conversion device 20 receives DC power from the power supply device 2 via the power supply line Lp and the power supply line Ln.
- the power conversion device 20 performs a power conversion operation for converting DC power into AC power in the main circuit 20a. Specifically, a plurality of switching elements (see FIG. 4) in the main circuit 20a are turned on and off at a predetermined timing.
- the power conversion device 20 supplies the converted AC power to the control object M2. Thereby, the power converter device 20 carries out drive control of the control object M2.
- the main circuit 10a and the ground line Le are equivalently connected via the stray capacitance Cf1.
- the main circuit 20a and the ground line Le are equivalently connected via the stray capacitance Cf1 via the stray capacitance Cf2.
- the power converter 10 transmits a ground voltage signal Ve corresponding to predetermined information (see FIG. 3C) to the power converter 20. That is, in the present embodiment, power conversion device 10 functions as a power conversion device on the transmission side, and power conversion device 20 functions as a power conversion device on the reception side.
- FIG. 2 is a diagram illustrating a configuration related to communication in the power conversion device 10.
- the power conversion apparatus 10 includes a fundamental frequency generation unit 11, a PWM carrier signal generation unit 12, a PWM signal generation unit 13, a drive circuit 14, and switching elements 15 of the main circuit 10a. Since the plurality of switching elements 15-up to 15-wn in the main circuit 10a perform an equivalent operation with respect to transmission of the ground voltage signal Ve, in FIG. 2, each of the plurality of switching elements 15-up to 15-wn is performed. Is shown as each switching element 15.
- the fundamental frequency generator 11 generates a reference signal having a fundamental frequency.
- a transmitter or a crystal resonator is used for the fundamental frequency generator 11 to supply the generated reference signal to the PWM carrier signal generator 12.
- the PWM carrier signal generator 12 receives a reference signal from fundamental frequency generator 11.
- the PWM carrier signal generation unit 12 generates a carrier signal using the reference signal.
- the PWM carrier signal generation unit 12 modulates the frequency of the carrier signal according to information (that is, a bit pattern) to be transmitted to the power conversion device 20. That is, the PWM carrier signal generation unit 12 includes a frequency modulation unit 12a and a generation unit 12b.
- the frequency modulation unit 12a receives information to be transmitted to the power conversion device 20 from the outside (for example, a host controller (not shown)).
- a plurality of candidate frequencies are preset in the frequency modulation unit 12a.
- the number of candidate frequencies is set in advance so as to correspond to the number of bit values that can be taken by the ground voltage signal Ve to be transmitted.
- a candidate frequency range having a certain degree of continuity may be set in advance instead of a plurality of discrete candidate frequencies.
- the candidate frequency f1 corresponding to the bit value “0” and the candidate frequency f2 corresponding to the bit value “1” (FIG. 3 (a)) is set in the frequency modulation unit 12a.
- correlation information between possible bit values and candidate frequencies is preset in the frequency modulation unit 12a for a plurality of candidate frequencies.
- each of the plurality of candidate frequencies f1 and f2 is set to a value different from the frequency f3 of the carrier signal used in the power converter 20 on the receiving side (see FIG. 7).
- the frequency modulation unit 12a selects, for example, one frequency from the plurality of candidate frequencies f1 and f2 (or candidate frequency ranges) according to information to be transmitted to the power conversion device 20, and requests the generation unit 12b. Switch the frequency to be used to the selected frequency. In other words, the frequency modulation unit 12a may digitally select and switch the frequency to be requested to the generation unit 12b, or may select and switch the analog frequency.
- the frequency modulation unit 12a requests the generation unit 12b to generate a carrier signal at the switched frequency. In response to the request, the generation unit 12b generates a carrier signal having a switched frequency using the reference signal as a reference (for example, a clock).
- the carrier signal is generated at the frequency f2 corresponding to the bit value “1” in the period TP2.
- a carrier signal is generated at a frequency f1 corresponding to the bit value “0”. That is, information to be transmitted to the power conversion device 20 is embedded in the carrier signal in the form of a frequency.
- the PWM carrier signal generation unit 12 supplies the generated carrier signal to the PWM signal generation unit 13.
- the PWM signal generator 13 receives a carrier signal from the PWM carrier signal generator 12.
- the PWM signal generation unit 13 generates a PWM signal using the carrier signal.
- the PWM signal generation unit 13 modulates the pulse width (duty ratio) of the PWM signal in accordance with the frequency command. That is, the PWM signal generation unit 13 includes a PWM modulation unit 13a and a generation unit 13b.
- the PWM modulator 13a receives a frequency command from the outside (for example, a host controller (not shown)).
- the PWM modulation unit 13a generates a threshold value corresponding to the frequency command and supplies it to the generation unit 13b.
- Generation unit 13b receives a carrier signal from PWM carrier signal generation unit 12, and receives a threshold value from PWM modulation unit 13a.
- the generating unit 13b compares the carrier signal with a threshold value, and generates a PWM signal according to the comparison result. At this time, the frequency of the generated PWM signal corresponds to the frequency of the carrier signal.
- the PWM signal is generated at the frequency f2a corresponding to the bit value “1”, and the pulse width (duty ratio) of the PWM signal is set according to the frequency command. It has changed into a thing. Further, in the period TP1, the PWM signal is generated at the frequency f1a corresponding to the bit value “0”, and the pulse width (duty ratio) of the PWM signal is changed according to the frequency command. That is, information to be transmitted to the power conversion device 20 is embedded in the PWM signal in the form of a frequency, and a parameter corresponding to the frequency command is embedded in the form of a pulse width (duty ratio).
- the PWM signal generation unit 13 supplies the generated PWM signal to the drive circuit 14.
- the drive circuit 14 receives the PWM signal from the PWM signal generation unit 13.
- the drive circuit 14 generates a drive signal for each of the plurality of switching elements 15-up to 15-wn (see FIG. 4) in the main circuit 10a, that is, for each switching element 15 in the main circuit 10a, according to the PWM signal.
- information to be transmitted to the power conversion device 20 is also embedded in the drive signal in the form of a frequency, and a parameter corresponding to the frequency command is embedded in the form of a pulse width (duty ratio).
- Each switching element 15 of the main circuit 10 a receives a drive signal from the drive circuit 14. Each switching element 15 of the main circuit 10a is turned on and off at a predetermined timing in accordance with the drive signal. Thereby, the power converter device 10 converts DC power into AC power, supplies the converted AC power to the control target M1 via the power lines Lu1, Lv1, and Lw1, and drives and controls the control target M1. Each switching element 15 of the main circuit 10a is a switching element for controlling the control object M1.
- each switching element 15 of the main circuit 10 a performs switching according to the PWM signal generated by the PWM signal generation unit 13. As a result, each switching element 15 of the main circuit 10a performs an operation for power conversion, and power-converts the ground voltage signal Ve corresponding to information to be transmitted through the power supply line Lp and the ground line Le, for example. Transmit to device 20.
- each switching element 15 of the main circuit 10a has a switching operation (on / off operation) serving both as an operation for power conversion and an operation for transmitting the ground voltage signal Ve by embedding information.
- the ground voltage signal Ve is transmitted at the frequency f2b corresponding to the bit value “1” in the period TP2.
- the ground voltage signal Ve is transmitted at the frequency f1b corresponding to the bit value “0”. That is, information to be transmitted to the power conversion device 20 is embedded in the anti-ground voltage signal Ve in the form of a frequency.
- FIG. 2 is a diagram illustrating a configuration related to communication in the power conversion device 20.
- the power conversion device 20 includes an anti-ground voltage detection unit 26, a carrier signal frequency extraction unit 27, a demodulation unit (restoration unit) 28, and an information processing unit 29.
- the ground voltage detector 26 detects the ground voltage signal Ve via the power supply line Lp and the ground line Le.
- the anti-earth voltage detection unit 26 acquires the electric potential of the power supply line Lp and the electric potential of the earth line Le, and detects the anti-earth voltage signal Ve by obtaining the difference between the two using, for example, a differential amplifier. May be.
- the anti-ground voltage detector 26 may detect the potential of the node connected to the electrode on the main circuit 20a side of the stray capacitance Cf2 and the potential of the node connected to the electrode on the opposite side of the main circuit 20a of the stray capacitance Cf2.
- the ground voltage signal Ve may be detected by obtaining a difference between the two using, for example, a differential amplifier.
- the ground voltage detector 26 supplies the detected ground voltage signal Ve to the carrier signal frequency extractor 27.
- the carrier signal frequency extraction unit 27 receives the ground voltage signal Ve from the ground voltage detection unit 26.
- the carrier signal frequency extraction unit 27 extracts a frequency component corresponding to any frequency in a plurality of candidate frequencies (for example, f1, f2) (or candidate frequency range FR1) of the carrier signal from the ground voltage signal Ve.
- the carrier signal frequency extraction unit 27 includes a plurality of bandpass filters 27a and 27b and a specification unit 27c as illustrated in FIG.
- the plurality of band pass filters 27a and 27b have pass bands corresponding to a plurality of candidate frequencies of the carrier signal.
- the plurality of band-pass filters 27a and 27b are provided corresponding to the number of bit values that can be taken by the ground voltage signal Ve.
- the band pass filter 27a has a pass band corresponding to the candidate frequency f1. That is, the band pass filter 27a has a pass band corresponding to the bit value “0”. In the cases shown in FIGS. 3A to 3C, the bandpass filter 27a has a pass band that selectively passes the vicinity of the frequency f1b corresponding to the candidate frequency f1, that is, the bit value “0”. is doing.
- the band pass filter 27b has a pass band corresponding to the candidate frequency f2. That is, the band pass filter 27b has a pass band corresponding to the bit value “1”. In the cases shown in FIGS. 3A to 3C, the bandpass filter 27b has a pass band that selectively passes the vicinity of the frequency f2b corresponding to the candidate frequency f2, that is, corresponding to the bit value “1”. is doing.
- the identifying unit 27c When the identifying unit 27c receives a signal from one of the plurality of bandpass filters 27a and 27b, the identifying unit 27c converts the received signal into a frequency component corresponding to any frequency among the plurality of candidate frequencies (or candidate frequency ranges). Identify if there is.
- the specifying unit 27c when receiving the frequency component of the frequency f1b from the bandpass filter 27a, the specifying unit 27c specifies that the frequency component corresponds to the candidate frequency f1, that is, the bit value “0”.
- the specifying unit 27c when receiving the frequency component of the frequency f2b from the bandpass filter 27b, specifies the frequency component corresponding to the candidate frequency f2, that is, the bit value “1”.
- the carrier signal frequency extraction unit 27 extracts a frequency component corresponding to one of the plurality of candidate frequencies f1 and f2 by passing the anti-ground voltage signal Ve through the plurality of bandpass filters 27a and 27b.
- the carrier signal frequency extraction unit 27 supplies the extracted frequency component to the demodulation unit 28.
- the demodulation unit 28 receives the extracted frequency component and / or the corresponding candidate frequency identification result from the carrier signal frequency extraction unit 27.
- the demodulator (restoration unit) 28 restores the information transmitted from the power converter 10 according to the extracted frequency component and / or the corresponding candidate frequency identification result.
- a plurality of candidate frequencies (or candidate frequency ranges) corresponding to those set in the frequency modulator 12a are preset.
- the number (or range length) corresponding to the number of possible bit values of the ground voltage signal Ve to be transmitted is set in advance in the same manner as that set in the frequency modulation unit 12a. Yes.
- the candidate frequency f1 corresponding to the bit value “0” and the candidate frequency f2 corresponding to the bit value “1” (FIG. 3 ( a) see) is set in the demodulator 28.
- correlation information between possible bit values and candidate frequencies corresponding to those set in the frequency modulator 12a is preset for a plurality of candidate frequencies.
- the correlation information set in the frequency modulation part 12a is updated, it is preferable that the correlation information set in the demodulation part 28 is also updated synchronously.
- the demodulator 28 when it is recognized that the anti-earth voltage signal Ve having the frequency f2b corresponding to the candidate frequency f2 is received in the period TP2, the demodulator 28 sets the frequency f2 to the corresponding frequency f2. The bit value is converted to “1”.
- the demodulator 28 converts the frequency f1 into the corresponding bit value “0”. That is, the demodulator 28 restores information (that is, a bit pattern) embedded in the ground voltage signal Ve. The demodulator 28 supplies the restored information to the information processor 29.
- the information processing unit 29 receives the restored information from the demodulation unit 28.
- the information processing unit 29 performs predetermined information processing using the received information.
- the information processing unit 29 performs information processing for controlling the power conversion device 20 in conjunction with the power conversion device 10 using the received information.
- the carrier signal generation unit 912 does not have the frequency modulation unit 12a (see FIG. 2) in the power conversion device 910 on the transmission side, as shown in FIG.
- the amplitude of the ground voltage signal is modulated in the power converter 910 on the transmission side according to the information to be transmitted. That is, it is necessary to change the impedance of the power supply line Lp with respect to the ground line Le according to information to be transmitted. Therefore, as shown in FIG. 17, a bypass line Lb that bypasses the line Lf that equivalently connects the main circuit 10a and the ground line Le via the stray capacitance Cf1 and connects the power supply line Lp and the ground line Le.
- the impedance element 943 and the switching element 942 are connected in parallel to the bypass line Lb, and the impedance element 944 is inserted in series to the bypass line Lb. Furthermore, a drive circuit 941 for controlling on / off of the switching element 942 is added, and an ON / OFF control unit 941a for controlling on / off of the switching element 942 according to information to be transmitted is provided in the drive circuit 941. Become.
- the transmission-side power conversion device 910 is increased in size, and the manufacturing cost of the transmission-side power conversion device 910 tends to increase.
- the impedance element 943 and the impedance element 944 are capacitive elements, it is necessary to increase the electrode area in order to increase the capacitance. As a result, the transmission-side power conversion device 910 is further increased in size, and the manufacturing cost of the transmission-side power conversion device 910 tends to further increase.
- the carrier signal generation unit 12 includes the frequency modulation unit 12a.
- the carrier signal generation unit 12 switches to a frequency selected from among a plurality of candidate frequencies f1 and f2 (or candidate frequency range FR1) according to information to be transmitted to the power conversion device 20, and the switched frequency is changed. Having a carrier signal.
- the PWM signal generation unit 13 generates a PWM signal using the generated carrier signal.
- Each switching element 15 of the main circuit 10a performs an operation for power conversion by switching according to the generated PWM signal, and at the same time, a pair corresponding to information to be transmitted via the power supply line Lp and the ground line Le.
- the ground voltage signal Ve is transmitted to the power converter 20.
- each switching element 15 of the main circuit 10a has a switching operation (on / off operation) serving as an operation for power conversion and an operation for transmitting the ground voltage signal Ve with information embedded therein.
- the power conversion device 10 converts the ground voltage signal corresponding to the information to be transmitted from the power conversion device 10 without adding a large-scale circuit configuration 940 (see FIG. 17) dedicated to communication in the power conversion device 10 on the transmission side. It can be transmitted to the device 20. That is, it is possible to communicate an anti-ground voltage signal corresponding to information and to reduce the manufacturing cost on the transmission side.
- the ground voltage detection unit 26 detects the ground voltage signal Ve through the power supply line Lp and the ground line Le.
- the carrier signal frequency extraction unit 27 corresponds to any one of a plurality of candidate frequencies f1 and f2 (or candidate frequency range FR1) of the carrier signal from the ground voltage signal Ve detected by the ground voltage detection unit 26. Extract frequency components.
- the demodulator 28 restores the information transmitted from the power conversion device 10 according to the frequency component extracted by the carrier signal frequency extractor 27. Thereby, the information embedded in the ground voltage signal Ve can be taken out, and the ground voltage signal Ve corresponding to the information transmitted from the power conversion device 10 on the transmission side as described above can be received. That is, it is possible to communicate an earth voltage signal according to information.
- the carrier signal frequency extraction unit 27 includes a plurality of bandpass filters 27a and 27b corresponding to a plurality of candidate frequencies f1 and f2 (or a candidate frequency range FR1).
- the carrier signal frequency extraction unit 27 passes the ground voltage signal Ve detected by the ground voltage detection unit 26 through the plurality of bandpass filters 27a and 27b, so that the plurality of candidate frequencies f1 and f2 (or the candidate frequency range FR1). ) Is extracted.
- the frequency component corresponding to any one of the plurality of candidate frequencies f1 and f2 (or the candidate frequency range FR1) of the carrier signal can be extracted from the ground voltage signal Ve.
- the impedance of the power supply line Lp with respect to the ground line Le is changed according to the information to be transmitted, and the amplitude of the ground voltage signal according to the information to be transmitted. Since the amplitude varies depending on the impedance of the power supply line, depending on the system, there is a concern that the signal level needs to be individually adjusted or the reliability of communication is lowered.
- the anti-ground voltage signal Ve in the form of a frequency for communication, and therefore the communication system does not depend on the impedance of the power supply line, so the signal level must be individually adjusted.
- the versatility of communication can be improved.
- the power conversion device 910 on the transmission side shown in FIG. 17 modulates the amplitude of the voltage signal to ground according to the information to be transmitted, the amplitude is affected when a single surge or the like flows from the outside. Therefore, there is a concern about the occurrence of communication errors.
- the first embodiment is a communication method that does not depend on the amplitude of the ground voltage signal, and even if the amplitude changes temporarily, the communication is not affected, so that the communication reliability is unlikely to decrease.
- the transmission-side power conversion device 910 shown in FIG. 17 when multi-value communication is attempted, a configuration corresponding to the impedance element 943, the switching element 942, the drive circuit 941, and the ON / OFF control unit 941 a is configured. It is necessary to increase the number of sets of bit values to be increased. As a result, the transmission-side power conversion device 910 is further increased in size, and the manufacturing cost of the transmission-side power conversion device 910 tends to further increase.
- the frequency modulation unit 12a of the PWM carrier signal generation unit 12 has a plurality of pieces of correlation information between the bit values that can be taken by the ground voltage signal Ve and the candidate frequencies.
- Candidate frequencies or candidate frequency ranges
- correlation information between possible bit values and candidate frequencies corresponding to those set in the frequency modulator 12a is preset for a plurality of candidate frequencies.
- multi-value communication since the number of possible bit values of the ground voltage signal Ve to be transmitted can be increased without updating the hardware, multi-value communication can be easily realized. In other words, multi-value communication can be realized while suppressing an increase in manufacturing cost of the power converter 10 on the transmission side.
- the frequency command information embedded in the PWM wave at the same time is sufficiently small, usually about 1/100 of the frequency of the PWM carrier wave, and does not affect information transmission.
- the frequency command is set to 60 Hz when the motor is operated.
- the carrier wave frequency is usually in the order of kHz, it is easy to distinguish on the receiving side.
- each switching element 15 of the main circuit 10a may be formed using a wide band gap semiconductor.
- a SiC element may be applied to each switching element 15 of the main circuit 10a.
- the carrier signal frequency extraction unit 27i of the power conversion device 20i on the receiving side performs frequency analysis on the ground voltage signal Ve detected by the ground voltage detection unit 26, thereby providing a plurality of candidates. You may extract the frequency component corresponding to any frequency of a frequency (or candidate frequency range).
- the carrier signal frequency extraction unit 27i includes, for example, a Fourier transform unit 27ai and a specifying unit 27bi.
- the Fourier transform unit 27ai performs a Fourier transform on the ground voltage signal Ve detected by the ground voltage detection unit 26 to obtain a frequency spectrum as shown in FIG.
- the specifying unit 27bi specifies whether the obtained frequency spectrum is a frequency component corresponding to which of a plurality of candidate frequencies (or candidate frequency ranges).
- the peak Pk1 when the peak Pk1 appears at the position of the frequency f1b corresponding to the candidate frequency f1 by the Fourier transform of the Fourier transform unit 27ai, the peak Pk1 corresponds to the candidate frequency f1, that is, corresponds to the bit value “0”. Specify that it is a frequency component.
- the peak Pk2 when the peak Pk2 appears at the position of the frequency f2b corresponding to the candidate frequency f2 by the Fourier transform of the Fourier transform unit 27ai, the peak Pk2 corresponds to the candidate frequency f2, that is, corresponds to the bit value “0”. Specify that it is a frequency component.
- a plurality of candidate frequencies f1 and f2 (or candidate frequency ranges FR1) of the carrier signal can be obtained from the ground voltage signal Ve. ) Can be extracted.
- each of the power conversion device 10 and the power conversion device 20 is an inverter
- the power conversion device 10 and the power conversion device 20 are different from each other in the supplied power. Any other form may be used as long as it converts the power into the power and outputs the converted power.
- each of the power conversion device 10 and the power conversion device 20 is a converter, for example, which converts supplied AC power into DC power and outputs the converted DC power to a predetermined control target (for example, an inverter). You may do it.
- each of the power conversion device 10 and the power conversion device 20 is, for example, a step-up chopper or a step-down chopper, converts the supplied DC power into DC power having a different power level, and converts the converted DC power to a predetermined control target. May be output.
- the power conversion device 10 and the power conversion device 20 are connected to the AC power (for example, three-phase AC power) from the power supply device 2j via the power supply lines Lr, Ls, and Lt. ),
- the supplied AC power may be converted into AC power having a different power level, and the converted AC power may be output to the control objects M1 and M2.
- Embodiment 2 the power conversion system 100 according to the second embodiment will be described. Below, it demonstrates focusing on a different part from Embodiment 1.
- FIG. 1 the power conversion system 100 according to the second embodiment will be described. Below, it demonstrates focusing on a different part from Embodiment 1.
- the power conversion device 10 in the power conversion system 1, is a transmission-side power conversion device and the power conversion device 20 is a reception-side power conversion device.
- the power converter 110 and the power converter 120 communicate bidirectionally.
- the power conversion device 110 further has a configuration for receiving an anti-ground voltage signal. That is, the power conversion device 110 further includes an anti-ground voltage detection unit 116, a carrier signal frequency extraction unit 117, a demodulation unit (restoration unit) 118, and an information processing unit 119.
- the functions of the ground voltage detection unit 116, the carrier signal frequency extraction unit 117, the demodulation unit (restoration unit) 118, and the information processing unit 119 are the same as those in the first embodiment, respectively. This is the same as the section 27, the demodulation section (restoration section) 28, and the information processing section 29 (see FIG. 2).
- the power converter 120 further has a configuration for transmitting an anti-ground voltage signal. That is, the power conversion device 120 includes a fundamental frequency generation unit 121, a PWM carrier signal generation unit 122, a PWM signal generation unit 123, a drive circuit 124, and each switching element 125 of the main circuit 20a.
- the functions of the fundamental frequency generator 121, the PWM carrier signal generator 122, the PWM signal generator 123, the drive circuit 124, and the switching elements 125 of the main circuit 20a are the fundamental frequency generator 11, the first embodiment, This is the same as the PWM carrier signal generation unit 12, the PWM signal generation unit 13, the drive circuit 14, and the switching elements 15 (see FIG. 2) of the main circuit 20a.
- the carrier signal frequency extraction unit 117 of the power conversion device 110 includes, for example, a plurality of bandpass filters 117a and 117b and a specifying unit 117c as illustrated in FIG.
- the plurality of band pass filters 117a and 117b have pass bands corresponding to the plurality of candidate frequencies f11 and f12 (or the candidate frequency range FR11) of the carrier signal of the power conversion device 120.
- the plurality of candidate frequencies f11 and f12 (or the candidate frequency range FR11) of the carrier signal of the power conversion device 120 do not overlap with the plurality of candidate frequencies f1 and f1 of the carrier signal of the power conversion device 110 and can be distinguished from each other. It is preset to have a large difference (see FIG. 12).
- the band pass filter 117a has a pass band corresponding to the candidate frequency f11. That is, the band pass filter 117a has a pass band corresponding to the bit value “0”.
- the band pass filter 117b has a pass band corresponding to the candidate frequency f12. That is, the band pass filter 117b has a pass band corresponding to the bit value “1”.
- the identifying unit 117c When the identifying unit 117c receives a signal from one of the plurality of bandpass filters 117a and 117b, the identifying unit 117c identifies which frequency of the plurality of candidate frequencies corresponds to the received signal.
- the specifying unit 117c when receiving the frequency component of the frequency f1b from the bandpass filter 117a, the specifying unit 117c specifies that the frequency component corresponds to the candidate frequency f1, that is, the bit value “0”. For example, when receiving the frequency component of the frequency f2b from the bandpass filter 117b, the specifying unit 117c specifies that the frequency component corresponds to the candidate frequency f2, that is, the bit value “1”.
- the carrier signal frequency extraction unit 117 passes the anti-ground voltage signal Ve through the plurality of bandpass filters 117a and 117b, thereby supporting any one of the plurality of candidate frequencies f11 and f12 (or the candidate frequency range FR11). Extracted frequency components.
- the carrier signal frequency extraction unit 117 supplies the extracted frequency component to the demodulation unit 118.
- power conversion device 110 further has a configuration for receiving an anti-ground voltage signal
- power conversion device 120 further has a configuration for transmitting an anti-ground voltage signal.
- the plurality of candidate frequencies f1 and f2 (or candidate frequency range FR1) of the carrier signal of power converter 110 and the plurality of candidate frequencies f11 and f12 (or candidate frequency range FR11) of the carrier signal of power converter 120 are mutually interchanged. Have a distinguishable difference (or frequency interval). Thereby, the power converter 110 and the power converter 120 can communicate bidirectionally.
- the carrier signal frequency extraction unit 117i performs frequency analysis on the ground voltage signal Ve detected by the ground voltage detection unit 116, thereby obtaining a plurality of candidate frequencies (or candidate frequency ranges). A frequency component corresponding to any frequency may be extracted.
- the carrier signal frequency extraction unit 117i includes, for example, a Fourier transform unit 117ai and a specifying unit 117bi.
- the Fourier transform unit 117ai performs a Fourier transform on the ground voltage signal Ve detected by the ground voltage detection unit 116 to obtain a frequency spectrum as shown in FIG.
- the specifying unit 117bi specifies whether the obtained frequency spectrum is a frequency component corresponding to any of the plurality of candidate frequencies f11 and f12 (or the candidate frequency range FR11).
- the peak Pk11 when the peak Pk11 appears at the position of the frequency corresponding to the candidate frequency f11 by the Fourier transform of the Fourier transform unit 117ai, the peak Pk11 corresponds to the candidate frequency f11, that is, the frequency corresponding to the bit value “0”. Identify the ingredients.
- the peak Pk12 when a peak Pk12 appears at a frequency corresponding to the candidate frequency f12 by the Fourier transform of the Fourier transform unit 117ai, the peak Pk12 corresponds to the candidate frequency f12, that is, the frequency corresponding to the bit value “0”. Identify the ingredients.
- the frequency of the ground voltage signal Ve is changed to any one of the carrier signal candidate frequencies f11 and f12. Corresponding frequency components can be extracted.
- Embodiment 3 the power conversion system 200 according to the third embodiment will be described. Below, it demonstrates focusing on a different part from Embodiment 1.
- FIG. 1 the power conversion system 200 according to the third embodiment.
- the power conversion system 1 includes one transmission-side power conversion device 10 and one reception-side power conversion device 20, but in Embodiment 3, the power conversion system 200 includes One transmission-side power conversion device 10 and a plurality of reception-side power conversion devices 20, 230 (see FIG. 13) are provided.
- the power conversion system 200 further includes a power conversion device 230.
- the power conversion device 10, the power conversion device 20, and the power conversion device 230 are commonly connected by the same power supply line Lp, commonly connected by the same power supply line Ln, and commonly connected by the same ground line Le. Has been.
- the power conversion device 230 is connected to the power supply device 2, the power conversion device 10, and the power conversion device 20 via the power supply line Lp and the power supply line Ln.
- the power conversion device 230 is connected to the ground potential via the ground wire Le.
- the power converter 230 is connected to the controlled object M3 via the power lines Lu3, Lv3, and Lw3.
- the power converter 230 receives DC power from the power supply device 2 through the power supply line Lp and the power supply line Ln.
- the power conversion device 230 performs a power conversion operation for converting DC power into AC power in the main circuit 230a. Specifically, a plurality of switching elements (see FIG. 4) in the main circuit 230a are turned on and off at a predetermined timing.
- the power converter 230 supplies the converted AC power to the control object M3. Thereby, the power converter device 230 drives and controls the control object M3.
- the main circuit 230a and the ground wire Le are equivalently connected via the stray capacitance Cf3.
- the voltage to ground voltage Ve (see FIG. 3 (c)) is, for example, the power supply line Lp and It is transmitted not only to the power converter 20 but also to the power converter 230 via the ground wire Le. Therefore, in the present embodiment, using this, the ground voltage signal Ve (see FIG. 3C) corresponding to predetermined information is transmitted from the power conversion device 10 to the power conversion device 20 and the power conversion device 230.
- the power conversion device 10 functions as a power conversion device on the transmission side
- the power conversion device 20 and the power conversion device 230 function as power conversion devices on the reception side.
- predetermined information can be simultaneously distributed from the power conversion device 10 to the power conversion device 20 and the power conversion device 230.
- the case where there are two power conversion devices on the reception side is illustrated, but there may be three or more power conversion devices on the reception side.
- Embodiment 4 FIG. Next, a power conversion system 300 according to the fourth embodiment will be described. Below, it demonstrates centering on a different part from Embodiment 1, 3. FIG.
- the power conversion system 1 includes one power conversion device 10 on the transmission side and one power conversion device 20 on the reception side.
- the power conversion system 300 includes A plurality of power conversion devices 10 and 230 on the transmission side (see FIG. 13) and a power conversion device 320 on the reception side (see FIG. 14) are provided.
- the power conversion device 320 on the reception side distinguishes from which power conversion devices 10 and 230 on the transmission side the transmission is performed. There is a need.
- the power converter 320 on the reception side includes a plurality of bandpass filters 327 a and 327 b corresponding to the plurality of candidate frequencies f1 and f2 of the carrier signal of the power converter 10, and the power converter A plurality of bandpass filters 327c and 327d corresponding to a plurality of candidate frequencies f11 and f12 of the 230 carrier signals and a specifying unit 327e are included.
- the plurality of bandpass filters 327a and 327b have passbands corresponding to the plurality of candidate frequencies f1 and f2 (or the candidate frequency range FR1) of the carrier signal of the power conversion device 10.
- the plurality of bandpass filters 327c and 327d have pass bands corresponding to the plurality of candidate frequencies f11 and f12 (or candidate frequency range FR11) of the carrier signal of the power conversion device 230.
- the plurality of candidate frequencies f11 and f12 (or candidate frequency range FR11) of the carrier signal of the power conversion device 230 do not overlap with the plurality of candidate frequencies f1 and f2 (or candidate frequency range FR1) of the carrier signal of the power conversion device 10. And are set in advance so as to have a difference distinguishable from each other (see FIG. 12).
- the identifying unit 327e When the identifying unit 327e receives a signal from any of the plurality of bandpass filters 327a, 327b, 327c, and 327d, the identifying unit 327e identifies from which power converter the received signal is transmitted. At the same time, the frequency component corresponding to any one of the plurality of candidate frequencies of the specified power conversion device is specified.
- the carrier signal frequency extraction unit 327 passes the anti-ground voltage signal Ve through the plurality of bandpass filters 327a, 327b, 327c, and 327d, so that the plurality of candidate frequencies f1, f2, f11, f12 (or the candidate frequency range FR1 , FR11), a frequency component corresponding to one of the frequencies is extracted.
- the carrier signal frequency extraction unit 117 supplies the extracted frequency component to the demodulation unit 118.
- the power conversion device 10 in the power conversion system 300 capable of transmitting the ground voltage signal Ve from the plurality of transmission-side power conversion devices 10 and 230 to the reception-side power conversion device 320, the power conversion device 10
- the difference between the plurality of candidate frequencies f1 and f2 (or candidate frequency range FR1) of the carrier signal and the plurality of candidate frequencies f11 and f12 (or candidate frequency range FR11) of the carrier signal of the power converter 230 is different from each other.
- the power converter 320 on the receiving side can correctly receive information from each of the power converter 10 and the power converter 1230.
- the case where there are two power conversion devices on the transmission side is illustrated, but there may be three or more power conversion devices on the transmission side.
- the candidate frequencies of the carrier signals of the power converters on each transmission side are set in advance so as not to overlap each other and have a difference that can be distinguished from each other.
- the power converter 320 on the receiving side can correctly receive information from each power converter on the transmitting side.
- the case where there is one power conversion device on the reception side is illustrated, but there may be two or more power conversion devices on the reception side. Or in the modification of said Embodiment 4, two or more power converters on the receiving side may be sufficient.
- Embodiment 5 a power conversion system 400 according to the fifth embodiment will be described. Below, it demonstrates centering on a different part from Embodiment 2. FIG.
- two power conversion devices 110 and 120 communicate bidirectionally in the power conversion system 100.
- three or more power conversion devices 410 communicate bidirectionally.
- the power conversion system 400 for example, when viewed from the power conversion device 410, there are a plurality of power conversion devices 20 and 230 that can be the transmission side, and thus which power conversion device 20 in the power conversion device 410 that can be the reception side. , 230 need to be distinguished.
- the power converter 410 on the receiving side has a plurality of carrier frequencies corresponding to a plurality of candidate frequencies f21 and f22 (see FIG. 16) (or candidate frequency range FR21) of the carrier signal of the power converter 20.
- the plurality of bandpass filters 427a and 427b have pass bands corresponding to the plurality of candidate frequencies f21 and f22 (or the candidate frequency range FR21) of the carrier signal of the power conversion device 20.
- the plurality of bandpass filters 427c and 427d have pass bands corresponding to the plurality of candidate frequencies f11 and f12 (or candidate frequency range FR11) of the carrier signal of the power conversion device 230.
- the plurality of candidate frequencies f21 and f22 (or candidate frequency range FR21) of the carrier signal of the power converter 20 and the plurality of candidate frequencies f1 and f2 (or candidate frequency range FR1) of the carrier signal of the power converter 410 and the power converter It is set in advance so as not to overlap with any of the plurality of candidate frequencies f11 and f11 (or candidate frequency range FR11) of the 230 carrier signals and to have a difference distinguishable from each other (see FIG. 16). .
- the specifying unit 427e specifies from which power conversion device the received signal is transmitted. At the same time, the frequency component corresponding to any one of the plurality of candidate frequencies of the specified power conversion device is specified.
- the carrier signal frequency extraction unit 417 passes the anti-ground voltage signal Ve through the plurality of band-pass filters 427a, 427b, 427c, and 427d, so that the plurality of candidate frequencies f1, f2, f21, f22, f11, f12 (or The frequency component corresponding to any frequency in the candidate frequency ranges FR1, FR11, FR21) is extracted.
- the carrier signal frequency extraction unit 417 supplies the extracted frequency component to the demodulation unit 118.
- the power converter device 410 was exemplarily described, the same applies to the other power converter devices 20 and 230.
- a plurality of candidate frequencies f1 and f2 (or candidate frequency range FR1) of the carrier signal of power conversion apparatus 410 and a plurality of candidate frequencies f21 and f22 of the carrier signal of power conversion apparatus 20 (
- the candidate frequency range FR21) and the plurality of candidate frequencies f11 and f12 (or candidate frequency range FR11) of the carrier signal of the power conversion device 230 have a difference that can be distinguished from each other. Thereby, when transmitting and receiving information bidirectionally between three or more power converters, the information can be correctly communicated.
- the carrier signal frequency extraction unit 417i performs frequency analysis on the ground voltage signal Ve detected by the ground voltage detection unit 116, thereby obtaining a plurality of candidate frequencies (or candidate frequency ranges). A frequency component corresponding to any frequency may be extracted.
- the carrier signal frequency extraction unit 417i includes, for example, a Fourier transform unit and a specifying unit (see FIG. 11).
- the Fourier transform unit Fourier transforms the ground voltage signal Ve detected by the ground voltage detection unit 116 to obtain a frequency spectrum as shown in FIG.
- the specifying unit specifies from which power conversion device the obtained frequency spectrum is transmitted, and a frequency component corresponding to which of the plurality of candidate frequencies of the specified power conversion device. Identify if there is.
- a plurality of carrier signal candidate frequencies f1, f2, f21, f22, f11 A frequency component corresponding to any frequency in f12 (or candidate frequency ranges FR1, FR11, FR21) can be extracted.
- the case where three power conversion devices are commonly connected by the same power supply lines Lp and Ln and the same ground line Le is illustrated, but the same power supply lines Lp and Ln are used. There may be four or more power converters connected in common by the same ground line Le.
- the power conversion device and the power conversion system according to the present invention are useful for communication between a plurality of power conversion devices.
Abstract
Description
実施の形態1にかかる電力変換システム1について図1を用いて説明する。図1は、電力変換システム1の構成を示す図である。
次に、電力変換装置10における通信に関連した構成について図2を用いて説明する。図2は、電力変換装置10における通信に関連した構成を示す図である。
PWMキャリア信号生成部12は、発生されたキャリア信号をPWM信号生成部13へ供給する。
PWM信号生成部13は、発生されたPWM信号を駆動回路14へ供給する。
例えば、キャリア信号周波数抽出部27は、図5に示すように、複数のバンドパスフィルタ27a、27b及び特定部27cを有する。
次に、実施の形態2にかかる電力変換システム100について説明する。以下では、実施の形態1と異なる部分を中心に説明する。
次に、実施の形態3にかかる電力変換システム200について説明する。以下では、実施の形態1と異なる部分を中心に説明する。
次に、実施の形態4にかかる電力変換システム300について説明する。以下では、実施の形態1、3と異なる部分を中心に説明する。
次に、実施の形態5にかかる電力変換システム400について説明する。以下では、実施の形態2と異なる部分を中心に説明する。
なお、電力変換装置410について例示的に説明したが、他の電力変換装置20、230についても同様である。
2 電源装置
10 電力変換装置
10a 主回路
11 基本周波数生成部
12 PWMキャリア信号生成部
12a 周波数変調部
12b 発生部
13 PWM信号生成部
13a PWM変調部
13b 発生部
14 駆動回路
15 スイッチング素子
20 電力変換装置
20a 主回路
26 対アース電圧検出部
27 キャリア信号周波数抽出部
27a、27b バンドパスフィルタ
27ai フーリエ変換部
27c 特定部
28 復調部
29 情報処理部
100 電力変換システム
110 電力変換装置
116 対アース電圧検出部
117、117i キャリア信号周波数抽出部
117a、117b バンドパスフィルタ
117ai フーリエ変換部
117c 特定部
118 復調部
119 情報処理部
120 電力変換装置
121 基本周波数生成部
122 PWMキャリア信号生成部
123 PWM信号生成部
124 駆動回路
125 スイッチング素子
200 電力変換システム
230 電力変換装置
230a 主回路
300 電力変換システム
320 電力変換装置
327 キャリア信号周波数抽出部
327a~327d バンドパスフィルタ
327e 特定部
400 電力変換システム
410 電力変換装置
417、417i キャリア信号周波数抽出部
427a~427d バンドパスフィルタ
427e 特定部
910 電力変換装置
912 キャリア信号生成部
940 回路構成
941 駆動回路
941a ON/OFF制御部
942 スイッチング素子
943 インピーダンス素子
944 インピーダンス素子
Cf1、Cf2、Cf3 浮遊容量
M1、M2、M3 制御対象
Claims (17)
- 電力供給線及びアース線を介して第2の電力変換装置に接続された電力変換装置であって、
前記第2の電力変換装置に送信すべき情報に応じて複数の候補周波数又は候補周波数範囲のうちから選択した周波数に切り替え、切り替えられた周波数を有するキャリア信号を発生させるキャリア信号生成部と、
前記発生されたキャリア信号を用いてPWM信号を発生させるPWM信号生成部と、
制御対象を制御するためのスイッチング素子であって、前記発生されたPWM信号に従ってスイッチングすることにより、電力変換のための動作を行うとともに、前記電力供給線及び前記アース線を介して前記送信すべき情報に対応した対アース電圧信号を前記第2の電力変換装置へ送信するスイッチング素子と、
を備えたことを特徴とする電力変換装置。 - 前記電力供給線及び前記アース線を介して対アース電圧信号を検出する検出部と、
前記検出された対アース電圧信号から、キャリア信号の複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する抽出部と、
前記抽出された周波数成分に応じて、前記第2の電力変換装置から送信された情報を復元する復元部と、
をさらに備えた
ことを特徴とする請求項1に記載の電力変換装置。 - 前記スイッチング素子は、ワイドバンドギャップ半導体を用いて形成されている
ことを特徴とする請求項1に記載の電力変換装置。 - 電力供給線及びアース線を介して第1の電力変換装置に接続された電力変換装置であって、
前記電力供給線及び前記アース線を介して対アース電圧信号を検出する検出部と、
前記検出された対アース電圧信号から、キャリア信号の複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する抽出部と、
前記抽出された周波数成分に応じて、前記第1の電力変換装置から送信された情報を復元する復元部と、
を備えたことを特徴とする電力変換装置。 - 前記抽出部は、前記複数の候補周波数又は候補周波数範囲に対応した複数のバンドパスフィルタを有し、前記検出された対アース電圧信号を前記複数のバンドパスフィルタに通すことにより、前記複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する
ことを特徴とする請求項4に記載の電力変換装置。 - 前記抽出部は、前記検出された対アース電圧信号を周波数解析することにより、前記複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する
ことを特徴とする請求項4に記載の電力変換装置。 - 第1の電力変換装置と、
電力供給線及びアース線を介して第1の電力変換装置に接続された第2の電力変換装置と、
を備え、
前記第1の電力変換装置は、
前記第2の電力変換装置に送信すべき情報に応じて複数の候補周波数又は候補周波数範囲のうちから選択した周波数に切り替え、切り替えられた周波数を有するキャリア信号を発生させるキャリア信号生成部と、
前記発生されたキャリア信号を用いてPWM信号を発生させるPWM信号生成部と、
制御対象を制御するためのスイッチング素子であって、前記発生されたPWM信号に従ってスイッチングすることにより、電力変換のための動作を行うとともに、前記電力供給線及び前記アース線を介して前記送信すべき情報に対応した対アース電圧信号を前記第2の電力変換装置へ送信するスイッチング素子と、
を有し、
前記第2の電力変換装置は、
前記電力供給線及び前記アース線を介して対アース電圧信号を検出する検出部と、
前記検出された対アース電圧信号から、キャリア信号の複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する抽出部と、
前記抽出された周波数成分に応じて、前記第1の電力変換装置から送信された情報を復元する復元部と、
を有する
ことを特徴とする電力変換システム。 - 前記第1の電力変換装置は、
前記電力供給線及び前記アース線を介して対アース電圧信号を検出する第1の検出部と、
前記検出された対アース電圧信号から、キャリア信号の複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する抽出部と、
前記抽出された周波数成分に応じて、前記第2の電力変換装置から送信された情報を復元する復元部と、
をさらに有し、
前記第2の電力変換装置は、
前記第1の電力変換装置に送信すべき情報に応じて複数の候補周波数又は候補周波数範囲のうちから選択した周波数に切り替え、切り替えられた周波数を有するキャリア信号を発生させるキャリア信号生成部と、
前記発生されたキャリア信号を用いてPWM信号を発生させるPWM信号生成部と、
第2の制御対象を制御するためのスイッチング素子であって、前記発生されたPWM信号に従ってスイッチングすることにより、電力変換のための動作を行うとともに、前記電力供給線及び前記アース線を介して前記送信すべき情報に対応した対アース電圧信号を前記第1の電力変換装置へ送信するスイッチング素子と、
をさらに有する
ことを特徴とする請求項7に記載の電力変換システム。 - 前記第1の電力変換装置のキャリア信号生成部が選択すべき複数の候補周波数又は候補周波数範囲と、前記第2の電力変換装置のキャリア信号生成部が選択すべき複数の候補周波数又は候補周波数範囲とは、互に重ならないように調整されている
ことを特徴とする請求項8に記載の電力変換システム。 - 前記スイッチング素子は、ワイドバンドギャップ半導体を用いて形成されている
ことを特徴とする請求項7に記載の電力変換システム。 - 前記抽出部は、前記複数の候補周波数又は候補周波数範囲に対応した複数のバンドパスフィルタを有し、前記検出された対アース電圧信号を前記複数のバンドパスフィルタに通すことにより、前記複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する
ことを特徴とする請求項7に記載の電力変換システム。 - 前記抽出部は、前記検出された対アース電圧信号を周波数解析することにより、前記複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する
ことを特徴とする請求項7に記載の電力変換システム。 - 前記電力供給線及び前記アース線を介して前記第1の電力変換装置及び前記第2の電力変換装置に接続された第3の電力変換装置をさらに備え、
前記第3の電力変換装置は、
前記第2の電力変換装置に送信すべき情報に応じて複数の候補周波数又は候補周波数範囲のうちから選択した周波数に切り替え、切り替えられた周波数を有するキャリア信号を発生させるキャリア信号生成部と、
前記発生されたキャリア信号を用いてPWM信号を発生させるPWM信号生成部と、
第3の制御対象を制御するためのスイッチング素子であって、前記発生されたPWM信号に従ってスイッチングすることにより、電力変換のための動作を行うとともに、前記電力供給線及び前記アース線を介して前記送信すべき情報に対応した対アース電圧信号を前記第2の電力変換装置へ送信するスイッチング素子と、
を有する
ことを特徴とする請求項7に記載の電力変換システム。 - 前記第1の電力変換装置のキャリア信号生成部が選択すべき複数の候補周波数又は候補周波数範囲と、前記第2の電力変換装置のキャリア信号生成部が選択すべき複数の候補周波数又は候補周波数範囲とは、互に重ならないように調整されている
ことを特徴とする請求項13に記載の電力変換システム。 - 前記電力供給線及び前記アース線を介して前記第1の電力変換装置及び前記第2の電力変換装置に接続された第3の電力変換装置をさらに備え、
前記第3の電力変換装置は、
前記電力供給線及び前記アース線を介して対アース電圧信号を検出する検出部と、
前記検出された対アース電圧信号から、キャリア信号の複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する抽出部と、
前記抽出された周波数成分に応じて、前記第1の電力変換装置から送信された情報を復元する復元部と、
を有する
ことを特徴とする請求項7に記載の電力変換システム。 - 前記電力供給線及び前記アース線を介して前記第1の電力変換装置及び前記第2の電力変換装置に接続された第3の電力変換装置をさらに備え、
前記第3の電力変換装置は、
前記第1の電力変換装置又は前記第2の電力変換装置に送信すべき情報に応じて複数の候補周波数又は候補周波数範囲のうちから選択した周波数に切り替え、切り替えられた周波数を有するキャリア信号を発生させるキャリア信号生成部と、
前記発生されたキャリア信号を用いてPWM信号を発生させるPWM信号生成部と、
第3の制御対象を制御するためのスイッチング素子であって、前記発生されたPWM信号に従ってスイッチングすることにより、電力変換のための動作を行うとともに、前記電力供給線及び前記アース線を介して前記送信すべき情報に対応した対アース電圧信号を前記第1の電力変換装置又は前記第2の電力変換装置へ送信するスイッチング素子と、
前記電力供給線及び前記アース線を介して対アース電圧信号を検出する検出部と、
前記検出された対アース電圧信号から、キャリア信号の複数の候補周波数又は候補周波数範囲のいずれかの周波数に対応した周波数成分を抽出する抽出部と、
前記抽出された周波数成分に応じて、前記第1の電力変換装置又は前記第2の電力変換装置から送信された情報を復元する復元部と、
を有する
ことを特徴とする請求項8に記載の電力変換システム。 - 前記第1の電力変換装置のキャリア信号生成部が選択すべき複数の候補周波数又は候補周波数範囲と、前記第2の電力変換装置のキャリア信号生成部が選択すべき複数の候補周波数又は候補周波数範囲と、前記第3の電力変換装置のキャリア信号生成部が選択すべき複数の候補周波数又は候補周波数範囲とは、互に重ならないように調整されている
ことを特徴とする請求項16に記載の電力変換システム。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112012005893.3T DE112012005893B4 (de) | 2012-02-17 | 2012-02-17 | Stromumwandlungsvorrichtung und Stromumwandlungssystem |
PCT/JP2012/053880 WO2013121589A1 (ja) | 2012-02-17 | 2012-02-17 | 電力変換装置、及び電力変換システム |
US13/641,381 US8847442B2 (en) | 2012-02-17 | 2012-02-17 | Power converting apparatus and power converting system |
CN201280001179.1A CN103384964B (zh) | 2012-02-17 | 2012-02-17 | 功率转换装置及功率转换系统 |
JP2012519815A JP5031130B1 (ja) | 2012-02-17 | 2012-02-17 | 電力変換装置、及び電力変換システム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2012/053880 WO2013121589A1 (ja) | 2012-02-17 | 2012-02-17 | 電力変換装置、及び電力変換システム |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013121589A1 true WO2013121589A1 (ja) | 2013-08-22 |
Family
ID=47016603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/053880 WO2013121589A1 (ja) | 2012-02-17 | 2012-02-17 | 電力変換装置、及び電力変換システム |
Country Status (5)
Country | Link |
---|---|
US (1) | US8847442B2 (ja) |
JP (1) | JP5031130B1 (ja) |
CN (1) | CN103384964B (ja) |
DE (1) | DE112012005893B4 (ja) |
WO (1) | WO2013121589A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011118044A1 (de) * | 2011-11-09 | 2013-05-16 | Conti Temic Microelectronic Gmbh | Verfahren zur Steuerung eines Motors mittels Pulsweitenmodulation (PWM) |
CN103607224B (zh) * | 2013-12-02 | 2015-09-23 | 国家电网公司 | 建立电力线载波通信系统双向链路的方法 |
KR101684839B1 (ko) | 2014-01-09 | 2016-12-08 | 미쓰비시덴키 가부시키가이샤 | 전력 변환 장치 |
CN104242992A (zh) * | 2014-09-16 | 2014-12-24 | 郑瑞勇 | 电源开槽通讯 |
US10141876B2 (en) * | 2014-11-18 | 2018-11-27 | Mitsubishi Electric Corporation | Power generator system, power generator control device, and power-generation balance control method for power generator system |
US10449614B2 (en) | 2014-12-18 | 2019-10-22 | Illinois Tool Works Inc. | Systems and methods for solid state sensor measurements of welding cables |
US10682722B2 (en) * | 2014-12-18 | 2020-06-16 | Illinois Tool Works Inc. | Systems and methods for measuring characteristics of a welding cable with a low power transceiver |
CN105071770A (zh) * | 2015-08-19 | 2015-11-18 | 杨舟 | 一种光伏电站运行状况的监控系统 |
CN106455198B (zh) * | 2016-09-18 | 2018-10-19 | 深圳市山普龙科技有限公司 | 基于电力载波的照明调光方法及装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08102369A (ja) * | 1994-09-30 | 1996-04-16 | Toshiba Lighting & Technol Corp | 照明制御装置 |
JP2000013382A (ja) * | 1998-06-19 | 2000-01-14 | Fujitsu General Ltd | 家庭内インターネットシステム |
JP2009117892A (ja) * | 2007-11-01 | 2009-05-28 | Toshiba Corp | 可視光通信装置 |
JP2009260953A (ja) * | 2008-03-28 | 2009-11-05 | Planners Land Co Ltd | 可視光通信装置 |
JP2011192481A (ja) * | 2010-03-12 | 2011-09-29 | Toshiba Lighting & Technology Corp | 調光装置および照明システム |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2887633B2 (ja) * | 1993-03-25 | 1999-04-26 | 富士通電装株式会社 | 直流電源装置 |
JPH0773973A (ja) * | 1993-08-31 | 1995-03-17 | Toshiba Lighting & Technol Corp | 照明装置 |
JP3882319B2 (ja) * | 1998-03-10 | 2007-02-14 | ソニー株式会社 | 電源供給アダプタ、電子機器および信号伝送システム |
JP2001036592A (ja) * | 1999-07-21 | 2001-02-09 | Mitsubishi Electric Corp | 配電線搬送装置及びその端末器 |
US6531970B2 (en) * | 2001-06-07 | 2003-03-11 | Analog Devices, Inc. | Digital sample rate converters having matched group delay |
JP4413469B2 (ja) * | 2002-04-10 | 2010-02-10 | 富士通テレコムネットワークス株式会社 | トラッキング制御電源システム |
JP2003304690A (ja) * | 2002-04-10 | 2003-10-24 | Fujitsu Access Ltd | 可変電源システム |
JP4423157B2 (ja) * | 2004-10-06 | 2010-03-03 | キヤノン株式会社 | 電力線通信装置およびその制御方法 |
JP4665569B2 (ja) * | 2004-11-30 | 2011-04-06 | トヨタ自動車株式会社 | 電圧変換装置および電圧変換装置における電圧変換の制御をコンピュータに実行させるためのプログラムを記録したコンピュータ読取り可能な記録媒体 |
US8223880B2 (en) * | 2005-03-16 | 2012-07-17 | Analog Devices, B.V. | System and method for power line communication |
JP2008066828A (ja) | 2006-09-05 | 2008-03-21 | Toshiba Lighting & Technology Corp | 電力線搬送送信装置、電力線搬送受信装置および電力線搬送通信システム |
GB2449427B (en) * | 2007-05-19 | 2012-09-26 | Converteam Technology Ltd | Control methods for the synchronisation and phase shift of the pulse width modulation (PWM) strategy of power converters |
US7602080B1 (en) * | 2008-11-26 | 2009-10-13 | Tigo Energy, Inc. | Systems and methods to balance solar panels in a multi-panel system |
JP4957538B2 (ja) * | 2007-12-27 | 2012-06-20 | アイシン・エィ・ダブリュ株式会社 | コンバータ装置,回転電機制御装置および駆動装置 |
JP4730420B2 (ja) * | 2008-10-09 | 2011-07-20 | トヨタ自動車株式会社 | モータ駆動装置およびモータ駆動装置の制御方法 |
US20100320014A1 (en) * | 2009-06-17 | 2010-12-23 | Gm Global Technology Operations, Inc. | Automotive power electronics with wide band gap power transistors |
AT508505B1 (de) * | 2009-06-18 | 2013-03-15 | Rp Technik E K | Sicherheitsbezogenes kommunikationsverfahren auf energieversorgungsleitungen und ein dazugehöriges netz |
JP5471259B2 (ja) * | 2009-10-02 | 2014-04-16 | アイシン・エィ・ダブリュ株式会社 | 制御装置 |
US8649923B2 (en) * | 2010-01-12 | 2014-02-11 | Ford Global Technologies, Llc | E-drive PWM frequency strategy |
WO2011096051A1 (ja) * | 2010-02-03 | 2011-08-11 | トヨタ自動車株式会社 | 回転電機の制御装置および回転電機の制御方法 |
JP5567381B2 (ja) * | 2010-04-27 | 2014-08-06 | 日立オートモティブシステムズ株式会社 | 電力変換装置 |
US8847542B2 (en) * | 2010-05-27 | 2014-09-30 | Toyota Jidosha Kabushiki Kaisha | Device and method for controlling motor |
US9035626B2 (en) * | 2010-08-18 | 2015-05-19 | Volterra Semiconductor Corporation | Switching circuits for extracting power from an electric power source and associated methods |
US9431825B2 (en) * | 2011-07-28 | 2016-08-30 | Tigo Energy, Inc. | Systems and methods to reduce the number and cost of management units of distributed power generators |
-
2012
- 2012-02-17 JP JP2012519815A patent/JP5031130B1/ja not_active Expired - Fee Related
- 2012-02-17 WO PCT/JP2012/053880 patent/WO2013121589A1/ja active Application Filing
- 2012-02-17 CN CN201280001179.1A patent/CN103384964B/zh not_active Expired - Fee Related
- 2012-02-17 DE DE112012005893.3T patent/DE112012005893B4/de not_active Expired - Fee Related
- 2012-02-17 US US13/641,381 patent/US8847442B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08102369A (ja) * | 1994-09-30 | 1996-04-16 | Toshiba Lighting & Technol Corp | 照明制御装置 |
JP2000013382A (ja) * | 1998-06-19 | 2000-01-14 | Fujitsu General Ltd | 家庭内インターネットシステム |
JP2009117892A (ja) * | 2007-11-01 | 2009-05-28 | Toshiba Corp | 可視光通信装置 |
JP2009260953A (ja) * | 2008-03-28 | 2009-11-05 | Planners Land Co Ltd | 可視光通信装置 |
JP2011192481A (ja) * | 2010-03-12 | 2011-09-29 | Toshiba Lighting & Technology Corp | 調光装置および照明システム |
Also Published As
Publication number | Publication date |
---|---|
US8847442B2 (en) | 2014-09-30 |
US20130214599A1 (en) | 2013-08-22 |
CN103384964B (zh) | 2015-06-03 |
JP5031130B1 (ja) | 2012-09-19 |
CN103384964A (zh) | 2013-11-06 |
DE112012005893B4 (de) | 2015-06-03 |
DE112012005893T5 (de) | 2014-11-06 |
JPWO2013121589A1 (ja) | 2015-05-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5031130B1 (ja) | 電力変換装置、及び電力変換システム | |
KR101777434B1 (ko) | 무선 전력 링크 상에서 데이터 통신을 검출하기 위한 시스템들 및 방법들 | |
US9300225B2 (en) | Solar photovoltaic power conversion system and method of operating the same | |
KR102036081B1 (ko) | 펄스 위치변조를 이용한 전력선 통신방법 및 장치 | |
CN1832314B (zh) | 模拟控制专用集成电路设备及用于控制高电压电源的方法 | |
CN109412276B (zh) | 适用于无线电能传输装置的控制电路及控制方法 | |
JPWO2016088261A1 (ja) | 共振型電力伝送システム、送信装置及び給電位置制御システム | |
CN102890505A (zh) | 边界系统 | |
US10498395B2 (en) | Power line communication apparatus and electronic control apparatus including power line communication apparatus | |
EP2446713A1 (en) | Method and device for programming a microcontroller | |
CN107086893B (zh) | 利用无线电接收器的车辆通信信号诊断 | |
JP2008079309A (ja) | Ac電源ラインを利用したデータ通信方法及び装置 | |
TW201304343A (zh) | 無線供電裝置 | |
KR102151209B1 (ko) | 전력선 통신을 이용한 조명 제어 시스템. | |
CN114172543A (zh) | 无线电能传输的调制解调器设计 | |
KR101083679B1 (ko) | 디지타이저 | |
US11061384B2 (en) | Methods, apparatus, and systems to facilitate multi-channel isolation | |
US20180115309A1 (en) | Gate signals | |
JP5552978B2 (ja) | 高圧電源装置 | |
WO2013046354A1 (ja) | 車両接近通報装置 | |
JP2008066828A (ja) | 電力線搬送送信装置、電力線搬送受信装置および電力線搬送通信システム | |
WO2005109667A1 (ja) | 電力線を利用する通信方法 | |
JP2015201946A (ja) | 電力変換装置 | |
US8638894B2 (en) | Data communication apparatus, data communication system, and data communication method | |
US11374433B2 (en) | Method for operating a circuit for generating an electromagnetic field, and circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2012519815 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13641381 Country of ref document: US |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12868895 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120120058933 Country of ref document: DE Ref document number: 112012005893 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12868895 Country of ref document: EP Kind code of ref document: A1 |