Synchronous Spindle Motor Drive
EDT. DATE DESIG. DESCRIPTION PAGE /29
02 2003.10.15 K.Takahashi
dded SSM etc. Y.Toyozawa
03 2004.06.09 K.Takahashi Revised Pole detect, etc. Y.Toyozawa
Connects the synchronous spindle motor to SPM. In driving synchronous spindle motor, the motor is driven on
condition that the power cable and the feedback cable are connected as the follows.
2.1 Connection of power cable
The Symbol U, V and W are the power terminal of the synchronous motor, and the symbol u, v and w are the
power terminal of SPM.
When the motor rotates to the direction CCW viewing from the flange side (output shaft side), please confirm
that the back EMF of U, V and W go forward in turn. It is necessary to connect the power cable as the follows
according to this confirmation.
U, V, W order ----------------> connect u and U, v and V, w and W
U, W, V order ----------------> connect u and U, v and W, w and V
2.2 Connection of feedback cable
The feedback cable of BZi / CZi sensor is connected to JYA2 on SPM. When the motor is rotated to the same
direction CCW as above power cable check, the feedback signal A/B phase should be observed as the following
chart. If not, it is necessary to change A and B signal so that the signal shows the chart order.
Back EMF phase order (CCW)
U V W
Feedback signal phase order (CCW)