DRV10983Q1 tune guide 中电阻的计算是否有问题

TI 工程师

DRV10983Q1   tune guide

2.2 Motor Resistance
For a wye-connected motor, the motor phase resistance refers to the resistance from the phase output to
the center tap (RPH_CT). This resistance is labeled as RPH_CT in Figure 2.

RY

RY

RY

Rû

Rû

Rû

CenterTap

Phase U

Phase V Phase W

Phase V Phase W

Phase U

RPH_CT

RPH_CT

RPH_CT

CenterTap

www.ti.com Acquire Motor Parameter

SLVUAV9 –June 2017 3
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated

DRV10983-Q1 Tuning Guide

Figure 2. Wye-Connected Motor Resistance

For a delta-connected motor, the motor phase resistance refers to the equivalent phase to center tap in
the wye configuration. In Figure 3, this resistance is calculated as RY × RPH_CT = RY.
For both the delta-connected motor and the wye-connected motor, the easy way to get the equivalent
RPH_CT is to measure the resistance between two phase terminals (RPH_PH) and then divide this value by
two: RPH_CT = ½ RPH_PH.

请问其中delta-connected 的 RY × RPH_CT = RY.这电阻值RY怎么算？用多少来计算，是否有问题？

Alvin Zheng：

其实就是三角形和Y形电阻网络换算问题。简单方式就是量出相间电压然后除以2。详细的可以参考：www.elecfans.com/…/story.php