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Motor driving circuit and motor driving system
US9048769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9048769-B2 |
| Application number | US-201313758509-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 4, 2013 |
| Priority date | Jul 23, 2012 |
| Publication date | Jun 2, 2015 |
| Grant date | Jun 2, 2015 |
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Abstract
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The motor driving circuit includes a first converting circuit that outputs an analog voltage proportional to a rotational speed of a motor, a differential voltage calculating circuit that calculates a differential voltage between the analog voltage and a rotation instruction voltage that prescribes the rotational speed of the motor and outputs a differential voltage signal including information on the differential voltage, a duty controlling circuit that outputs, based on the differential voltage signal, a duty controlling signal including information on a control duty that controls a duty of a PWM signal so as to bring the differential voltage between the rotation instruction voltage and the analog voltage close to zero, and a motor driving waveform controlling circuit that generates the PWM signal in response to a signal based on the duty controlling signal and that outputs the PWM signal.
First claim
Opening claim text (preview).
What is claimed is: 1. A motor driving circuit that controls driving of a motor with a PWM signal, comprising: a first converting circuit that outputs an analog voltage proportional to a rotational speed of the motor; a differential voltage calculating circuit that calculates a differential voltage between the analog voltage and a rotation instruction voltage that prescribes the rotational speed of the motor and outputs a differential voltage signal including information on the…
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Frequently asked questions
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- What does patent US9048769B2 cover?
- The motor driving circuit includes a first converting circuit that outputs an analog voltage proportional to a rotational speed of a motor, a differential voltage calculating circuit that calculates a differential voltage between the analog voltage and a rotation instruction voltage that prescribes the rotational speed of the motor and outputs a differential voltage signal including information…
- Who is the assignee on this patent?
- Toshiba Kk
- What technology area does this patent fall under?
- Primary CPC classification H02P6/182. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 02 2015 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).