Per Ranstad

This inventor holds 7 USPTO granted patents, plus 1 CIPO patent and 4 EPO patents. Top assignees: Alstom Technology Limited, General Electric Technology Gmbh, Abb Flakt Ab. Active years: 1997-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Per Ranstad. Retrieved from https://idiyas.com/inventor/per-ranstad

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 7

% Patents Active = 28.6

CIPO Patents = 1

EPO Patents = 4 (Patent Applications = 9)

Average Co-Inventor Count = 2.4

ph-index = 4

Forward Citations = 53(Granted Patents)

Location History:

Vaxjo, SE (1997 - 2017)
Växjö, SE (2013 - 2018)

Company Filing History:

4 out of 1,386

Alstom Technology Limited

patents

2 out of 674

General Electric Technology Gmbh

Years Active: 1997-2018

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7 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9899831 - Method and device to protect an ESP power supply from transient over-voltages on the power grid (2018-02-20),

2. 9543855 - Voltage source converter (VSC) with neutral-point-clamped (NPC) topology and method for operating such voltage source converter (2017-01-10),

3. 9331561 - Method to minimize input current harmonics of power systems such as ESP power systems (2016-05-03),

4. 9325300 - Method for the operation of electrostatic precipitators (2016-04-26),

5. 9132434 - Method to control the line distoration of a system of power supplies of electrostatic precipitators (2015-09-15),

6. 8570776 - Method and device for determining a control scheme for an active power filter (2013-10-29),

7. 5639294 - Method for controlling the power supply to an electrostatic precipitator (1997-06-17),

Title: The Innovative Contributions of Per Ranstad

Introduction

Per Ranstad is a notable inventor based in Växjö, Sweden. He has made significant contributions to the field of electrical engineering, particularly in power supply technologies. With a total of six patents to his name, Ranstad's work focuses on enhancing the efficiency and reliability of power systems.

Latest Patents

Ranstad's latest patents include a method and device designed to protect an electrostatic precipitator (ESP) power supply from transient over-voltages on the power grid. This innovative power supply converter unit converts the frequency of alternating input supply to high-frequency alternating output. The design includes a rectifier that transforms alternating input supply into direct current, which is then converted back into alternating current using a full bridge inverter. The invention also features overvoltage protection circuitry to ensure the stability of the power supply converter unit.

Another significant patent by Ranstad is a Voltage Source Converter (VSC) with Neutral-Point-Clamped (NPC) topology. This converter comprises an intermediate DC circuit with capacitances connected in series, providing a central tap terminal. The design allows for the generation of alternating voltage phases and includes a circuit arrangement typical of conventional NPC converters, enhancing the functionality and efficiency of power systems.

Career Highlights

Throughout his career, Per Ranstad has worked with prominent companies such as Alstom Technology Limited and General Electric Technology GmbH. His experience in these organizations has contributed to his expertise in developing advanced power supply technologies.

Collaborations

Ranstad has collaborated with several professionals in his field, including Jörgen Linner and Thiago Batista Soeiro. These collaborations have likely enriched his work and led to innovative solutions in power supply systems.

Conclusion

Per Ranstad's contributions to the field of electrical engineering through his patents and collaborations highlight his role as a significant inventor. His innovative solutions continue to impact the efficiency and reliability of power supply technologies.

Profile summary based on public USPTO records.