A comparison between six-step and sine-wave commutation methods for brushless direct current motors

Hilmi Yafi Al-Faruq, Harry Septanto


This research is focused on the design and implementation of an electronic circuit for commuting a brushless direct current (BLDC) motor and its data acquisition system, as well as conducting experiments on them. We propose a drive circuit using two modules, each consist of a dual H-bridge, that are cheap and can be easily obtained. Two different commutation methods, namely six-step and sine-wave commutations, are applied. Each of these implements a different way for its open-loop speed control, i.e., a voltage-controlled-current-source is implemented along with the six-step commutation and the step duration approach is implemented along with the sine-wave commutation. The experiment data are acquired using a developed desktop application. Some experiment results lead us to find that, on its own, both commutation methods have a narrow range of speed. Nevertheless, if both methods are used together, this range can be increased. Also, the relation between speed and its controlling signals for both methods are shown.


BLDC motor; Data acquisition system; Electronic commutation circuit; H-bridge; Open-loop speed control

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DOI: http://doi.org/10.11591/ijpeds.v13.i2.pp%25p


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