A New PWM Strategy for High Efficiency Drive of DC Servo Motors
Summary :
A new pulse-width-modulation (PWM) circuit is developed for high efficiency, bidirectional drive of dc servo motors. The circuit generates the positive- and negative-going sweeps shifted each other in time by a half period of the repetition frequency. Compared with these sweeps, a control input is converted into the PWM signal which drives a motor in a push-pull manner. This method of driving a motor consumes no power when it is at rest and reduces the switching loss of power stage to a half that of a conventional PWM scheme. An efficiency higher than 90% is achieved by a prototype PWM driver using power MOSFET's for the switching frequency lower then 60 kHz. Simultaneous conduction of two complementary power transistors in each leg of a power bridge, and thus the short-circuit current, never occurs because of the phase-shift in the two sweeps. Besides the high efficiency, the new scheme features wide dynamic range made possible by nonlinear PWM process.
- Publication
- IEICE TRANSACTIONS on transactions Vol.E71-E No.12 pp.1298-1302
- Publication Date
- 1988/12/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Electroic Circuits
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Hiroji YOKOTE, Kenzo WATANABE, "A New PWM Strategy for High Efficiency Drive of DC Servo Motors" in IEICE TRANSACTIONS on transactions,
vol. E71-E, no. 12, pp. 1298-1302, December 1988, doi: .
Abstract: A new pulse-width-modulation (PWM) circuit is developed for high efficiency, bidirectional drive of dc servo motors. The circuit generates the positive- and negative-going sweeps shifted each other in time by a half period of the repetition frequency. Compared with these sweeps, a control input is converted into the PWM signal which drives a motor in a push-pull manner. This method of driving a motor consumes no power when it is at rest and reduces the switching loss of power stage to a half that of a conventional PWM scheme. An efficiency higher than 90% is achieved by a prototype PWM driver using power MOSFET's for the switching frequency lower then 60 kHz. Simultaneous conduction of two complementary power transistors in each leg of a power bridge, and thus the short-circuit current, never occurs because of the phase-shift in the two sweeps. Besides the high efficiency, the new scheme features wide dynamic range made possible by nonlinear PWM process.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e71-e_12_1298/_p
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@ARTICLE{e71-e_12_1298,
author={Hiroji YOKOTE, Kenzo WATANABE, },
journal={IEICE TRANSACTIONS on transactions},
title={A New PWM Strategy for High Efficiency Drive of DC Servo Motors},
year={1988},
volume={E71-E},
number={12},
pages={1298-1302},
abstract={A new pulse-width-modulation (PWM) circuit is developed for high efficiency, bidirectional drive of dc servo motors. The circuit generates the positive- and negative-going sweeps shifted each other in time by a half period of the repetition frequency. Compared with these sweeps, a control input is converted into the PWM signal which drives a motor in a push-pull manner. This method of driving a motor consumes no power when it is at rest and reduces the switching loss of power stage to a half that of a conventional PWM scheme. An efficiency higher than 90% is achieved by a prototype PWM driver using power MOSFET's for the switching frequency lower then 60 kHz. Simultaneous conduction of two complementary power transistors in each leg of a power bridge, and thus the short-circuit current, never occurs because of the phase-shift in the two sweeps. Besides the high efficiency, the new scheme features wide dynamic range made possible by nonlinear PWM process.},
keywords={},
doi={},
ISSN={},
month={December},}
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TY - JOUR
TI - A New PWM Strategy for High Efficiency Drive of DC Servo Motors
T2 - IEICE TRANSACTIONS on transactions
SP - 1298
EP - 1302
AU - Hiroji YOKOTE
AU - Kenzo WATANABE
PY - 1988
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E71-E
IS - 12
JA - IEICE TRANSACTIONS on transactions
Y1 - December 1988
AB - A new pulse-width-modulation (PWM) circuit is developed for high efficiency, bidirectional drive of dc servo motors. The circuit generates the positive- and negative-going sweeps shifted each other in time by a half period of the repetition frequency. Compared with these sweeps, a control input is converted into the PWM signal which drives a motor in a push-pull manner. This method of driving a motor consumes no power when it is at rest and reduces the switching loss of power stage to a half that of a conventional PWM scheme. An efficiency higher than 90% is achieved by a prototype PWM driver using power MOSFET's for the switching frequency lower then 60 kHz. Simultaneous conduction of two complementary power transistors in each leg of a power bridge, and thus the short-circuit current, never occurs because of the phase-shift in the two sweeps. Besides the high efficiency, the new scheme features wide dynamic range made possible by nonlinear PWM process.
ER -
English
