| 摘要 |
A power-receiving rectifier circuit (RC) is, for example, formed in series with a power-receiving resonating mechanism. A first power-receiving device (PRU1) has a load with a low equivalent resistance value, and has a bimodal voltage gain frequency characteristic, which is the ratio of a direct current output voltage to a direct current input voltage, while a second power-receiving device (PRU2) has a load with a high equivalent resistance value, and has a unimodal voltage gain frequency characteristic. In the first power-receiving device (PRU1), by setting a coefficient of coupling between a power receiving coil (ns1) and a power transmitting coil (np), the voltage gain is defined by the positional relationship between one of the frequencies at which the voltage gain in the first power-receiving device (PRU1) is a maximum, and an operating frequency; and in the second power-receiving device (PRU2), the frequency at which the voltage gain is a maximum is determined so as to be close to the operating frequency, and the voltage gain is determined in accordance with the setting of the coefficient of coupling between a power receiving coil (ns2) and the power transmitting coil (np). |
