| 发明名称 |
RESOLVER EXCITATION CIRCUIT |
| 摘要 |
A resolver excitation circuit includes a D/A converter configured to generate a sinusoidal excitation signal being supplied to a resolver outputting a resolver signal to detect a rotation angle of a target object with a predetermined sampling frequency; and an amplifier configured to be constituted with an operational amplifier amplifying the excitation signal generated by the D/A converter. The operational amplifier has a gain-frequency characteristic set so that the predetermined sampling frequency is a higher frequency than a cutoff frequency of a gain of the operational amplifier, and the gain of the operational amplifier at the predetermined sampling frequency is lower than 0 dB. |
| 申请公布号 |
US2015276373(A1) |
申请公布日期 |
2015.10.01 |
| 申请号 |
US201514662375 |
申请日期 |
2015.03.19 |
| 申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
IDE Akihiko;OISHI Makoto |
| 分类号 |
G01B7/30 |
主分类号 |
G01B7/30 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A resolver excitation circuit comprising:
a D/A converter configured to generate a sinusoidal excitation signal being supplied to a resolver outputting a resolver signal to detect a rotation angle of a target object with a predetermined sampling frequency; and an amplifier configured to be constituted with an operational amplifier amplifying the excitation signal generated by the D/A converter, wherein the operational amplifier has a gain-frequency characteristic set so that the predetermined sampling frequency is a higher frequency than a cutoff frequency of a gain of the operational amplifier, and the gain of the operational amplifier at the predetermined sampling frequency is lower than 0 dB. |
| 地址 |
Toyota-shi JP |
