| 摘要 |
Conventionally, accurate zero-cross position drive control is not achieved due to overlapping noise in reverse electromotive force signals detected by electromagnetic actuator drive devices in order to perform a control. Thus, this electromagnetic actuator drive device generates an AC waveform signal V1 produced from an AC waveform constituting a one-period section of an electromotive force signal, and a reference signal V2 obtained by adding an arbitrary and different phase shift amount for each period to the AC waveform signal having a frequency identical to that of the waveform signal V1. The phase alignment of the drive pulse is adjusted using phase information obtained from a correlation operation of these signals V1, V2. |
