Method for controlling an electrical tool
US-2015375386-A1 · Dec 31, 2015 · US
Vehicle, and control method for vehicle
US8975839B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8975839-B2 |
| Application number | US-201313742085-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 15, 2013 |
| Priority date | Jan 19, 2012 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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A control device includes a PWM control unit that executes PWM control over an alternating-current motor mounted on a vehicle. The PWM control unit includes an alarm sound generation processing unit that executes an alarm sound generating process of generating an alarm sound from the motor for informing a pedestrian, or the like, of the approach of the vehicle by intentionally varying phase current flowing through the motor by periodically adding a variation value (ΔV) to a d-axis voltage command value (Vd) at a predetermined interval. At the time of executing the alarm sound generating process, the alarm sound generation processing unit adjusts the variation value (ΔV) such that the d-axis voltage command value (Vda) resulting from the alarm sound generating process (the sum of Vd and ΔV) falls within a range in which it is possible to suppress occurrence of an overcurrent in the motor.
First claim
Opening claim text (preview).
What is claimed is: 1. A vehicle comprising: an alternating-current motor coupled to a wheel of the vehicle; and a control device that controls the alternating-current motor through pulse width modulation control, wherein when the control device varies phase current flowing through the alternating-current motor by periodically adding a variation value to a voltage command value of the alternating- current motor so as to generate a sound from the alternating-current motor, the…
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Frequently asked questions
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- What does patent US8975839B2 cover?
- A control device includes a PWM control unit that executes PWM control over an alternating-current motor mounted on a vehicle. The PWM control unit includes an alarm sound generation processing unit that executes an alarm sound generating process of generating an alarm sound from the motor for informing a pedestrian, or the like, of the approach of the vehicle by intentionally varying phase cur…
- Who is the assignee on this patent?
- Iseda Mitsuru, Katoh Satoru, Yamada Kenji, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H02P31/00. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 10 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).