Actuator driving device for executing positive and negative energization method under pulse width modulation control
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United States of America Patent
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Jan 31, 2017
Grant Date -
Dec 18, 2014
app pub date -
Jun 16, 2014
filing date -
Jun 18, 2013
priority date (Note) -
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Abstract
An actuator driving device drives an actuator connected to an output terminal. The control unit of the actuator driving device includes a PWM delay time setting unit, a first duty ratio setting unit, and a second duty ratio setting unit. The PWM delay time setting unit sets a delay time of pulse width modulation control for a driving voltage to be applied to the output terminal and outputs setting information to the first and second duty ratio setting units. The first duty ratio setting unit sets the first duty ratio for a first PWM output unit, and the second duty ratio setting unit sets the second duty ratio for a second PWM output unit. When positive and negative energization is performed, the control unit controls to reduce the amount of change in current in the current peak of a PWM waveform by providing a short-circuit period in response to the energization amount.
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