Dual-mode power drive for active magnetic bearings

Hsin Lin Chiu, Nan Chyuan Tsai

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


A compact-design hybrid power amplifier for Active Magnetic Bearing (AMB) units, named as Dual Cooperative Drive Circuit (DC 2 ), is designed and verified by intensive experiments. DC 2 can operate under dual mode: either Digital Driving Mode (DDM) or Analogue Driving Mode (ADM). By taking advantages of the complementary cooperation between DDM and ADM, the proposed DC 2 manifests its superiorities mainly in three aspects. (i) Compared to a traditional 2-level Pulse-Width Modulation drive circuit, the improvement degree of reducing the amplitudes of current ripples is up to 62%. (ii) By taking advantages of mutually complementary cooperation between DDM and ADM, the steady-state errors of output current, which is exerted to the coils of AMBs, can be much reduced by DC 2 . (iii) DC 2 can provide high current slew rate so that the response of AMBs is pretty fast and quick enough to regulate the high-speed rotor back to the neutral position within a very short time period below 0.40 ms. In addition, the proposed DC 2 is particularly suitable to be complied with digital controllers and Digital Signal Processors since the commands or drive sequences are all in Direct Current manner.

Original languageEnglish
Pages (from-to)162-167
Number of pages6
JournalIET Electric Power Applications
Issue number2
Publication statusPublished - 2019 Feb 1

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


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