| 摘要 |
<p>PURPOSE:To prevent the current of a main motor on the two-phase side from bounching, by arranging a limiter circuit on the one-phase side and a limiter circuit on the two-phase side. CONSTITUTION:A pattern voltage generating section 2 impresses brake pattern voltage 2a to an ACR arithmetic system 5 on the one phase side and to an ACR arithmetic system 7 on the two phase side. The respective ACR arithmetic systems 5 and 7 issue the conductivity signals 5a, 7a for each phase on the basis of input signal. A limiter circuit 11 on the one phase side, at the final speed of a regenerative brake impresses a limiter signal 11a to the ACR arithmetic system 5 on the one phase side to attenuate the conductivity signal 5a. In the meantime, A limiter circuit 12 on the two phase side, with the maximum conductivity on the two phase side at the final speed of the regenerative brake, impresses limiter signal 12a to the ACR arithmetic system 7 on the two phase side to attenuate the conductivity signal 7a.</p> |
