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US-2024367552-A1 · Nov 7, 2024 · US
Drive signal generating circuit
US9130496B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9130496-B2 |
| Application number | US-201213594396-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 24, 2012 |
| Priority date | Aug 25, 2011 |
| Publication date | Sep 8, 2015 |
| Grant date | Sep 8, 2015 |
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Abstract
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A drive-signal-generating circuit includes: a current-detecting unit to detect a current flowing through a three-phase motor; a calculating unit to calculate d- and q-axis currents based on a detection output of the current detecting unit; a reference-signal-output unit to output a reference signal indicating a first-reference value of the q-axis current for rotating the motor at a target-rotational speed; first- and second-control-signal-output units to output first- and second-control signals corresponding to respective errors between current values of the d- and q-axis currents and a second and the first reference values, respectively; a drive-signal-output unit to output such a drive signal that the d- and q-axis currents reach the second and first reference values, respectively; and an adjusting unit to adjust the detection output so that a ripple of the second-control signal become smaller, after a rotational speed of the motor reaches a predetermined rotational speed corresponding to the target-rotational speed.
First claim
Opening claim text (preview).
What is claimed is: 1. A drive signal generating circuit, comprising: a current detecting unit configured to detect a current flowing through a three-phase motor, wherein the current detecting unit includes: a differential amplifier circuit configured to amplify, by a predetermined gain, a difference between a voltage corresponding to a current flowing through the three-phase motor and a reference voltage, and output the amplified difference as the detection output, wherein the c…
Assignees
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Classifications
Electricity · mapped topic
- H02P21/22Primary
Electricity · mapped topic
- H02P21/0035Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9130496B2 cover?
- A drive-signal-generating circuit includes: a current-detecting unit to detect a current flowing through a three-phase motor; a calculating unit to calculate d- and q-axis currents based on a detection output of the current detecting unit; a reference-signal-output unit to output a reference signal indicating a first-reference value of the q-axis current for rotating the motor at a target-rotat…
- Who is the assignee on this patent?
- Takai Kazumasa, Morihara Hiroyuki, Semiconductor Components Ind
- What technology area does this patent fall under?
- Primary CPC classification H02P21/22. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 08 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).