Image formation apparatus
AssigneeKonica Minolta Business Technologies, Inc.
InventorsTakahiro Tsujimoto, Takashi Honda, Shiro Umeda
Life of this patent
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Abstract
An error detector determines whether or not there is a frequency error. In a case where it is determined that there is the frequency error, the error detector further determines whether or not the frequency error stays within a targeted error range. In a case where it is determined that the frequency error stays within the targeted error range, a proportional gain is decreased. In a case where it is determined that the frequency error fails to stay within the targeted error range, the proportional gain is increased. Then, a frequency proportional-integral-derivative operation processing is executed based on a set gain.
Claims7
An image formation apparatus comprising:
- a direct-current brushless motor;
- a motor driver circuit which supplies current to said direct-current brushless motor based on an instruction signal in accordance with a targeted speed in order to drive said direct-current brushless motor;
- and
- a control circuit which adjusts said instruction signal outputted as a result of a proportional-integral-derivative operation control processing so that said motor driver circuit follows said targeted speed in response to input of a rotation signal outputted from said motor driver circuit, wherein
- said control circuit detects a targeted error based on comparison between a reference pulse signal indicating said targeted speed and a rotation pulse signal functioning as said rotation signal, and adjusts a gain used in said proportional-integral-derivative operation control processing based on the detected error.
An image formation apparatus comprising:
- a direct-current brushless motor;
- a motor driver circuit which supplies current to said direct-current brushless motor based on an instruction signal in accordance with a targeted speed in order to drive said direct-current brushless motor;
- and
- a control circuit which adjusts said instruction signal outputted as a result of a proportional-integral-derivative operation control processing so that said motor driver circuit follows said targeted speed in response to input of a rotation signal outputted from said motor driver circuit, wherein
- said control circuit adjusts a gain used in said proportional-integral-derivative operation control processing in accordance with a drive sequence.
Dependencies are inferred from the claim text.