Rotary drive mechanism and light dispersion system having the same
US-9515591-B2 · Dec 6, 2016 · US
Image forming apparatus
US9503003B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9503003-B2 |
| Application number | US-201414332987-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 16, 2014 |
| Priority date | Jul 23, 2013 |
| Publication date | Nov 22, 2016 |
| Grant date | Nov 22, 2016 |
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Abstract
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An image forming apparatus drives and rotates at least one of a photosensitive drum and a transport roller with use of a stepping motor in a multi-phase excitation mode. The image forming apparatus includes: a constant-voltage control unit controlling the stepping motor by applying a constant voltage for each phase; a constant-current control unit controlling the stepping motor by regulating an amount of current for each phase by a chopping control; a measuring unit measuring a chopping count of each phase on a per-step basis; a chopping count determination unit determining whether the chopping count of each phase is less than or equal to a predetermined count; and a control switching unit causing the constant-voltage control unit to control the stepping motor when the chopping count determination unit determines affirmatively, and causing the constant-current control unit to control the stepping motor when the chopping count determination unit determines negatively.
First claim
Opening claim text (preview).
What is claimed is: 1. An image forming apparatus for driving and rotating, with use of a stepping motor in a multi-phase excitation mode, at least one of a photosensitive drum on which an electrostatic latent image is to be formed and a transport roller that transports a recording sheet, the image forming apparatus comprising: a constant-voltage control unit configured to control a drive of the stepping motor by applying a constant voltage for each phase according to a clock sign…
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Classifications
- H02P8/12Primary
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9503003B2 cover?
- An image forming apparatus drives and rotates at least one of a photosensitive drum and a transport roller with use of a stepping motor in a multi-phase excitation mode. The image forming apparatus includes: a constant-voltage control unit controlling the stepping motor by applying a constant voltage for each phase; a constant-current control unit controlling the stepping motor by regulating an…
- Who is the assignee on this patent?
- Konica Minolta Inc
- What technology area does this patent fall under?
- Primary CPC classification H02P8/12. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).