Avoiding the use of WPT Magnetic coupling 20.05-38 kHz • NA systems transmitting power in (low-high power for 42-58 kHz NA the amateur radio frequency home appliances) 62-100 kHz NA ranges Capacitive coupling 425-524 kHz NA (low power for mobile devices) Coexistence conditions in assessment: (*1) Amateur radio devices: For capacitive coupling, 472-479 kHz band is an in-band case (sharing the same spectrum). For Amateur Radios, no official interference level requirements or rules from other systems are found. However, an agreement was to exclude this band allocated to Amateur Radios in the WPT operation frequency range and to set appropriate frequency offset. (*2) Public radio systems: 6 765-6 795 kHz is not designated as an ISM band in Japan. However, the regulations’ provisions allow the use for WPT applications in the band. New emission limits for WPT products in this band have been agreed, which may allow coexistence with the incumbent systems and higher transmission power in this band. TABLE 7.3 Summary of WPT for EV coexistence study results and ongoing considerations in Japan WPT for EV Incumbent systems Candidate SCRD (*1) ATS (*2) ITRS (*3) AM broadcast Amateur radio frequency (40 kHz, 60 kHz) (10-250 kHz) (10-250 kHz) (*4) devices (*5) ranges (526.5- (135.7- 1 606.5 kHz) 137.8 kHz) 42-48 kHz Not meet Not assessed Meets coexistence Meets coexistence since another coexistence conditions with the coexistence conditions condition did not conditions following notes. conditions with meet the following Inviting user’s • note. attention to the 52-58 kHz Not meet Not assessed Meets possibility of Avoiding the • coexistence since another coexistence interference to use of WPT conditions condition did not conditions AM broadcast systems meet radio receivers. transmitting power in the If harmful • amateur interference radio observed, WPT frequency devices shall ranges take appropriate measures
• Avoiding the use of WPT systems transmitting power in the amateur radio frequency ranges Magnetic coupling (low-high power for home appliances) 20.05-38 kHz NA 42-58 kHz NA 62-100 kHz NA Capacitive coupling (low power for mobile devices) 425-524 kHz NA Coexistence conditions in assessment: (*1) Amateur radio devices: For capacitive coupling, 472-479 kHz band is an in-band case (sharing the same spectrum). For Amateur Radios, no official interference level requirements or rules from other systems are found. However, an agreement was to exclude this band allocated to Amateur Radios in the WPT operation frequency range and to set appropriate frequency offset. (*2) Public radio systems: 6 765-6 795 kHz is not designated as an ISM band in Japan. However, the regulations’ provisions allow the use for WPT applications in the band. New emission limits for WPT products in this band have been agreed, which may allow coexistence with the incumbent systems and higher transmission power in this band. TABLE 7.3 Summary of WPT for EV coexistence study results and ongoing considerations in Japan WPT for EV Incumbent systems Candidate frequency ranges SCRD (*1) (40 kHz, 60 kHz) ATS (*2) (10-250 kHz) ITRS (*3) (10-250 kHz) AM broadcast (*4) (526.5- 1 606.5 kHz) Amateur radio devices (*5) (135.7- 137.8 kHz) 42-48 kHz Not meet coexistence conditions Not assessed since another condition did not meet Meets coexistence conditions coexistence conditions with the following notes. • Inviting user’s attention to the possibility of interference to AM broadcast radio receivers. • If harmful interference observed, WPT devices shall take appropriate measures Meets coexistence conditions with the following note. • Avoiding the use of WPT systems transmitting power in the amateur radio frequency ranges 52-58 kHz Not meet coexistence conditions Not assessed since another condition did not meet Meets coexistence conditions
R-REP-SM.2303-1-2015-MSW-E.docx